CN203362505U

CN203362505U - Internal gear machine

Info

Publication number: CN203362505U
Application number: CN 201320056643
Authority: CN
Inventors: R·皮普; A·高斯
Original assignee: Eckerle Industrie Elektronik GmbH
Current assignee: Eckerle Industrie Elektronik GmbH
Priority date: 2012-12-12
Filing date: 2013-01-31
Publication date: 2013-12-25
Anticipated expiration: 2023-01-31
Also published as: DE202012104839U1

Abstract

The utility model relates to an internal gear machine, it has the casing, is provided with the action wheel of outer system tooth and the internal gear of the interior system tooth of meshing with it in this casing. The internal gear is rotatably mounted in the circumferential direction around an internal gear rotational axis extending in the axial direction and has a plurality of internal gear teeth that delimit internal gear tooth gaps as seen in the circumferential direction. The internal gear has a plurality of radially extending recesses which each open into one of the internal gear tooth grooves and which are each open on the outer circumferential surface of the internal gear. A plurality of the recesses are arranged at a circumferential angle to one another, in each case in a first circumferential row and in a second circumferential row which is offset in the axial direction and in each case, as viewed in the circumferential direction. Each of the recesses of the second circumferential row is offset in the circumferential direction with respect to each of the recesses of the first circumferential row, which recesses are arranged directly adjacent to each other when viewed in the axial direction.

Description

Internal gear machine

Technical field

The utility model relates to a kind of internal gear machine, and it has housing, is provided with two meshed gears in the tooth meshing zone in this housing, and they refer to the driving wheel of outer tooth processed and the internal gear of interior tooth processed, and this internal gear supports prejudicially about this driving wheel.This driving wheel is rotatably mounted around the driving wheel-spin axis extended in the axial direction.This internal gear is rotatably mounted around the internal gear-spin axis extended in the axial direction in a circumferential direction.This internal gear has a plurality of internal gears-tooth section, and they are seen in a circumferential direction and define internal gear-teeth groove.This internal gear has the breach that a plurality of difference are extended transverse to axial direction in a lateral direction, and these breach lead to respectively in a plurality of internal gear-teeth groove and they open wide towards the outer peripheral surface of internal gear respectively.A plurality of in these breach are in the first circular row and circumferencial direction is mutual arranges to such an extent that be certain angle of circumference.In addition, other a plurality of breach are in the second circular row and circumferencial direction is mutual arranges to such an extent that be certain angle of circumference.The breach of the second circular row is staggeredly arranged in the axial direction with respect to the breach of the first circular row, and/or the first circular row is staggeredly arranged in the axial direction with respect to the second circular row.

Background technique

This internal gear machine is for example by DE10 2,004 021 216 A1 or known by EP 0 549 929 A1.It at this spindle to the internal gear pump with radial compensation.Its internal gear has the breach that a plurality of forms are radial hole.These radial holes mutually arrange so each other with radial spacing in couples on two circular row and respectively, make their Kong centers arrange parallelly with axial direction on imaginary straight line.These radial holes are used as respectively pressure channel and are used.When operation, the pressure medium of clamp-oning in the tooth meshing zone is transferred in the pressure tank (Drucktasche) of housing by these radial holes.In this structural type, at least one this breach preferably is set for each teeth groove of internal gear, or at least one this breach is necessary.In the gear of this relatively " wide ", see that in the axial direction a plurality of radial holes are necessary.When manufacturing the substantial radial hole, waste time and energy very much, and very expensive, especially because of single radial hole, not only to hole, but also will remove burr.

The model utility content

The purpose of this utility model is, improves like this internal gear machine of aforementioned type,, in the situation that construction size is constant the quantity in hole is reduced or be down to minimumly, but not there will be the associated change of efficiency and/or working life and/or pump noise.

This purpose with simply surprising type and mode by a kind of internal gear machine to realize, this gear mechanism is with housing, be provided with two meshed gears in the tooth meshing zone in this housing, described gear refers to the driving wheel of outer tooth processed and the internal gear of interior tooth processed, this internal gear supports prejudicially about this driving wheel, wherein, this driving wheel is rotatably mounted around driving wheel-spin axis, and wherein, this internal gear is rotatably mounted round the internal gear-spin axis extended in the axial direction in a circumferential direction, wherein this internal gear has a plurality of internal gears-tooth section, described internal gear-tooth section sees in a circumferential direction and defines internal gear-teeth groove, and wherein, this internal gear has a plurality of breach that extend transverse to axial direction at horizontal direction respectively, these breach lead to respectively in an internal gear-teeth groove in described internal gear-teeth groove, and described breach opens wide towards the outer peripheral surface of internal gear respectively, wherein a plurality of breach in these breach are arranged with an angle of circumference relative to each other in the first circular row and circumferencial direction, wherein, a plurality of breach in these breach are arranged with an angle of circumference relative to each other in the second circular row and circumferencial direction, and wherein the breach of the second circular row is staggeredly arranged in the axial direction with respect to the breach of the first circular row, and/or wherein the first circular row is staggeredly arranged in the axial direction with respect to the second circular row, wherein, each breach in the breach of the second circular row sees that with respect to each in the breach of the first circular row the breach of direct neighbor setting is staggeredly arranged in a circumferential direction in the axial direction.Briefly, the utility model refers to, the breach of the second circular row is staggeredly arranged in a circumferential direction with respect to the breach of the first circular row.

Breach by internal gear by layout of the present utility model, can be down to minimum by the quantity of breach.Situation ratio with in the patent documentation of mentioning in the above, even can reduce half by the quantity of breach by the utility model.Can obviously reduce manufacture cost by this way, and not there will be the associated change of efficiency and/or working life and/or pump noise.

The cross-section area of these breach can be selected like this, that is, this cross-section area is at least that the twice of cross-section area of the breach in the internal gear machine that prior art is identical is large on construction size.

By stipulating in preferred structural scheme, the breach of the first circular row is staggeredly arranged with the axial spacing of formed objects respectively relative to each other in the axial direction with respect to the breach of the second circular row.

By favourable improvement project, can stipulate, the breach of the first circular row is arranged in the first imaginary, public plane, and the breach of the second circular row is arranged in the second imaginary, public plane.

At this, can stipulate, the first plane and the second plane are staggeredly arranged each other with axial spacing.

Suitable, the first plane arranges respectively vertically with internal gear-spin axis with the second plane.

By the first structural form, can stipulate, internal gear has odd number internal gear-teeth groove.In other words can stipulate, internal gear has odd number internal gear-tooth section.

By the second structural form, can alternatively stipulate, internal gear has even number internal gear-teeth groove.In other words can stipulate, internal gear has even number internal gear-tooth section.

Preferably, at least one in these breach the 3rd breach is arranged in the internal gear zone of internal gear, and this internal gear zone is seen between the second breach in these breach of the first breach in these breach that are arranged on the first circular row and the second circular row in the axial direction.By improvement project, can stipulate, the 3rd breach of at least one in these breach is seen between the second breach in these breach of the first breach in these breach that are arranged on the first circular row and the second circular row in the axial direction.

By especially preferred structural scheme, can stipulate, unique the 3rd breach in these breach is arranged in the internal gear zone of internal gear, and this internal gear zone is seen between the second breach in these breach of the first breach in these breach that are arranged on the first circular row and the second circular row in the axial direction.By improvement project, can stipulate, unique the 3rd breach in these breach is seen between the second breach in these breach of the first breach in these breach that are arranged on the first circular row and the second circular row in the axial direction.

By a kind of especially preferred embodiment, can stipulate, described the 3rd breach is seen the center in the internal gear zone that is arranged on internal gear in the axial direction, between the second breach in these breach of first breach of this internal gear region division in these breach of the first circular row and the second circular row.By improvement project, can stipulate, described the 3rd breach is seen the centre between the second breach in these breach of the first breach in these breach that are arranged on the first circular row and the second circular row in the axial direction.

Preferably, described the first breach and described the second breach arrange with described the 3rd breach direct neighbor.

By above-mentioned measure, can in this zone of internal gear, realize wall thickness maximum between the breach of direct neighbor.In this zone of internal gear, not there will be by this way obvious internal gear to weaken or only there will be trickle internal gear to weaken.If internal gear-breach is seen in a circumferential direction with second breach relative to the first breach or the mutual same circumference angle of three breach relative to the second breach and is arranged, but contrary to the present invention circumferentially seeing and be arranged in public plane,, internal gear may not weaken on this position with allowing.So, may no longer can reach the operating pressure of equal height, and/or may limit its working life.

To above-mentioned measure alternatively or additionally, except two breach of the first circular row, the first circular row the breach of seeing in a circumferential direction direct neighbor setting respectively of jagged and this first circular row with the first angle of circumference of formed objects, arrange relative to each other, and/or except two breach of the second circular row, the second circular row the breach of seeing in a circumferential direction direct neighbor setting respectively of jagged and this second circular row with the second angle of circumference of formed objects, arrange relative to each other.

Can stipulate the first angle of circumference and the second angle of circumference equal and opposite in direction at this.

By especially preferred structural scheme, especially by described the second structural form of the present utility model, can stipulate, the first circular row the breach of seeing in a circumferential direction direct neighbor respectively of jagged and the first circular row with the first angle of circumference of formed objects, arranged, and/or the institute of the second circular row is jagged and the breach of seeing in a circumferential direction direct neighbor respectively of the second circular row is arranged with the second angle of circumference of formed objects.Can stipulate the first angle of circumference and the second angle of circumference equal and opposite in direction by especially preferred structural scheme at this.

By especially preferred embodiment, can stipulate, at least one breach in these breach leads in each internal gear-teeth groove of internal gear.

Suitable, these breach can form by columniform hole.These holes can be respectively start radially outward to extend to the excircle of internal gear from gap in tooth root scope separately or in the scope of internal gear-teeth groove separately or with the internal gear separately-axial slits of teeth groove adjacency always.

These breach preferably refer to radial indentation, especially radial hole.

Should be understood that by internal gear machine of the present utility model and can refer to internal gear pump or internal gear motor.Correspondingly should be understood that this internal gear machine can be used as internal gear pump and/or internal gear motor allows.When internal gear machine turns round, especially, when driving wheel is rotated round its driving wheel-spin axis, in the situation that internal gear rotates at the same time, together with driving wheel, turn round in a circumferential direction.

The internal gear machine that internal gear machine preferably can refer to have axially and/or radial pressure compensates.

By preferred structural scheme, driving wheel-spin axis and internal gear-spin axis extend in parallel.So, driving wheel-spin axis and internal gear-spin axis can arrange relative to each other with radial spacing.This radial spacing is equivalent to certain eccentricity of the supporting of driving wheel and internal gear.

By preferred structural scheme, this housing refers to multipart housing.This housing can form the border of area of low pressure, pressure initiation zone and the high-pressure area in chamber, and each gear is arranged in this chamber.Preferably can be in the high-pressure area in this chamber between the housing parts of the axial sides of gear and housing, at least one can be set on the direction of the spin axis of gear or axial pressing plate movably in the axial direction.This at least one axial pressing plate can be by pressure field directly or indirectly by pressure, especially high pressure loads, this pressure field can form on the side of gear dorsad at axial pressing plate, preferably by least one notch, maybe can be configured at least one notch and form, so this axial pressing plate can be pressed on the side of gear.In other words, this at least one axial pressing plate can be by pressure field directly or indirectly by pressure, especially high pressure loads, this pressure field forms on the side of gear and preferably by least one notch or be configured at least one notch and form dorsad at it, so this axial pressing plate is pressed on the side of gear.

Preferably, be provided with outside falculate free space between the internal gear of the driving wheel of tooth processed and interior tooth processed.The preferably filling block of multipart, especially two parts can be set in this free space.By a kind of preferred improvement project, this filling block can abut in like this driving wheel of driving wheel-tooth section and abut in the internal gear of internal gear-tooth section, that is, driving wheel and internal gear can be round their spin axis rotations with respect to filling block.By preferred structural scheme, can stipulate, this filling block is supported at least one filling block pin or filling block bolt, and it extends in the free space of pump chamber, and it is fixed, especially can be rotated to support at least one housing parts of pump case.

This driving wheel can be torsionally, preferably integrally with axle, be connected.Especially preferred, make to this driving wheel and axle single-piece.Driving wheel can be described as driving gear shaft together with axle.This axle can by least one support section at a side bearing of driving wheel at least one sliding bearing, preferably respectively by the support section from the two-side supporting of driving wheel sliding bearing separately.But this sliding bearing or sliding bearing monomer separately or many bodies ground are connected with the housing parts of housing, preferably pack into, especially be pressed in the housing parts of housing.Between the support section and sliding bearing of axle, or the hydrokinetics supporting that axle can be realized in ，Gai bearing play, bearing play can be set between support section separately and axle.Can give this bearing play supply pressure medium, preferably hydraulic fluid, especially oil.This bearing play can form axially the lubricating fluid passage extended along sliding bearing, the end Shang Yugai chamber of this lubricating fluid passage in its end, especially with the area of low pressure in chamber or be connected aspect fluid with the pressure initiation zone.This lubricating fluid passage can be connected aspect fluid with coupler or shaft sealing chamber, especially shaft sealing-ring cavity on Zhong the other end, its end.This shaft sealing chamber can be in being arranged on housing parts, preferably be configured to Simmer ring, especially be configured to the shaft seal limited boundary of radial axle Sealing, it abuts on axle and housing parts hermetically, or it seals axle and housing parts mutually.In preferred improvement project, can stipulate, pressure medium can flow in coupler or shaft sealing chamber, to lubricate axle and/or sliding bearing or sliding bearing separately by the lubricating fluid passage from this chamber.

Internal gear machine can preferably refer to high pressure-internal gear machine.

Should be understood that above feature and measure can at random combinations in implementation framework of the present utility model.

The accompanying drawing explanation

Draw in further feature of the present utility model, advantage and the requirement of viewpoint accessory rights, accompanying drawing and following specification part, in this specification part, by accompanying drawing, described preferred embodiment of the present utility model.Wherein:

Fig. 1 there is shown by internal gear machine of the present utility model in perspective;

Fig. 2 there is shown the internal gear machine in section at longitudinal profile, driving wheel-spin axis that it comprises driving wheel and the internal gear-spin axis of internal gear;

Fig. 3 shows along the cutting line 3-3 of Fig. 4, longitudinal sectional drawing with respect to the longitudinal sectional drawing of Fig. 1 round driving wheel-spin axis 90-degree rotation;

Fig. 4 shows the cross section of internal gear machine along the cutting line 4-4 of Fig. 2;

Fig. 5 there is shown the internal gear by the first structural form in perspective;

Fig. 6 shows the cross section of internal gear along the cutting line 6-6 of Fig. 7;

Fig. 7 overlooks the internal gear there is shown by Fig. 5;

Fig. 8 overlooks the internal gear there is shown by the second structural form;

Fig. 9 there is shown the layout by the member of the internal gear machine of Fig. 1 in perspective;

Figure 10 has illustrated the part by the device of Fig. 9 in decomposition view;

Figure 11 there is shown the filling block of the internal gear machine of the part under having in side-looking;

Figure 12 has illustrated other part of internal gear machine in decomposition view;

Figure 13 shows the axial pressing plate of two axial plates of internal gear machine;

Figure 14 has illustrated the scope of the circle marked with reference character 14 in Fig. 3 in the cross section amplified.

List of numerals

20 internal gear pump 33.1 support sections

21 housing 33.2 support sections

22 intermediate members/housing intermediate member 34.1 connecting grooves

23 the (the first) cover plate parts/flange cover plate 34.2 connecting grooves

24 the (the second) cover plate parts/closing panel 30 35 couplers

25 vacancy 36 driving wheels

26 pump chamber 37 suction chambers/suction zone

27 23 the axial pressing plate of outer annular groove 38.1

28 24 the axial pressing plate of each outer annular groove 38.2

29 23 hole 35 39 driving gear shafts

30.1(first) axle sleeve 40 driving wheels-tooth section

30.2(second) axle sleeve 41 driving wheels-teeth groove

(blind) hole 42.1 internal gears of 31 24

32 live axle 42.2 internal gears

43 internal gears-tooth section 61.1 blind holes

44 circumferencial direction 61.2 blind holes

45 internal gears-teeth groove 25 62 suction passages

46 driving wheels-spin axis 63 pressure channels

47 internal gears-spin axis 64 areas of low pressure/low-pressure cavity

48 speed changer plane/midplane 65 tooth meshing zones

49 66 high-pressure areas/hyperbaric chambers

50: 30 67 pressure initiation zones

51 variator axis 68 suction sides

52 spacings/eccentricity 69 on the pressure side

53 42 excircle 70.1 (the first) breach

Outer peripheral surface/outer cover 70.2 (the second) breach of 54 42

55 free spaces 35 70.3 (unique/3rd) breach

56 filling block 71 holes

57 (driving wheel)-sections 72 axial slits

58 (internal gear)-sections 73 axial directions

59.1 filling block pin/stay bolt 74.1 is distolateral/end faces/side faces

59.2 filling block pin/stay bolt 40 74.2 is distolateral/end faces/side faces

60.1 the width of axle head or projection 75 36,42.1,42.2

60.2 the external diameter of axle head or projection 76 42.1,42.2

60.3 the tip diameter of axle head or projection 77 42.1,42.2

60.4 axle head or projection 78 internal gear thickness

79.1 (the first) circular row 93.1 axial seals

79.2 (the second) circular row 93.2 axial seals

80.1 angle of circumference 25 94.1 supporting rings

80.2 angle of circumference 94.2 supporting rings

81 axial spacing 95 cross bars

82.1 plane 96 cross bars

82.2 plane 97 cams

83 internal gear zone 30 98 (supporting ring)-inner chambers

Arrow/clockwise direction of 85 36/presetting gap, rotation side 99.1

To 99.2 presetting gaps

Arrow/clockwise direction of 86 42.1/revolve, 100.1 control holes

Veer 100.2 control holes

87.1 radius 35 101 pressure ports

87.2 radius 102.1 step-down grooves

88.1 42.1 distolateral/end face 102.2 step-down indentations

88.2 42.1 distolateral/end face 103 extruding-pressure medium grooves

89.1 the outside of pressure field/notch 104 58/outer (circumference) face

89.2 the inboard of pressure field/notch 40 105 58/interior (circumference) face

(first) stop of 90 cams (interior) 106 59.1,59.2

91 cams (outward) face

92.1 (second) stop of 38 side 107 59.1,59.2

92.2 38 side face

108 36 tip diameter 122 seal roll dishs

109 57 inboard/interior (circumference) face 123 wedge slots

110 57 the outside/outer (circumference) face 124 seal roll

111.1 groove 20 125 leaf springs/seal roll spring

111.2 groove 126 abutment face

112 dihedron 127 angles

113.1 (first) stop surface of 112 side 128.1 58

113.2 (second) stop surface of 112 side 128.2 58

114 (first) with reference to groove 25 129.1 57 stop surface

(second) stop surface of 115 filling blocks most advanced and sophisticated 129.2 57

Notch 130 notches/grooves in 116 57

Notch 131 (wedge shape) pressure chamber in 117 58

118 towards (wedge) inclined-plane 132 pressure chambers of 116

119 towards (wedge) inclined-plane 30 133 additional springs of 117/leaf spring

120 (filling block-) gap 134 horizontal directions (radially)

121 angles of wedge

Embodiment

Internal gear machine shown in the drawings, its form is the internal gear pump 20 with part.This internal gear pump 20 has one, the preferred housing 21 of three parts.This housing 21 can be by the ring-type intermediate member 22 also referred to as the housing intermediate member, also referred to as the first cover plate part of flange cover plate and also referred to as the second cover plate part 24 of closing panel, assemble.Intermediate member 22 can preferably be made by high-intensity aluminium-extrudate.But the preferred You Lv – die castings of these two cover plate parts 23,24 is made.In order to save material and to improve casting technique, cover plate part 23,24 can have several notches or vacancy 25.When pressure load is higher, preferably can use the housing parts of being made by aluminium-wrought alloy, steel casting or steel.This intermediate member 22 radially surrounds pump chamber 26.These two cover plate parts 23,24 are limiting pump chamber 26 on axial direction 73.In the zone of each outer annular groove 27,28 of cover plate part 23,24, intermediate member 22 is overlapped on these two cover plate parts 23,24.The first cover plate part 23 has through hole 29, the first sliding bearings and is pressed in this hole with the form of the first axle sleeve 30.1.The blind hole 31 of the second cover plate part 24 flushes with this hole 29, and the second sliding bearing is pressed in this blind hole with the form of the second axle sleeve 30.2.The live axle 32 of internal gear pump 20 is bearing in these two axle sleeves 30.1,30.2 with support section 33.1,33.2 separately.

Be bearing in axle sleeve 30.1,30.2 to live axle 32 fluid dynamics.Axle sleeve 30.1,30.2 can refer to so-called three layers of lining, and they can consist of the mild steel outer cover with sprung copper layer and sliding layer (being made of plastics).If axle sleeve 30.1,30.2 is made by the application rolling depression method, especially by so-called " roll extrusion ", make, they have unshowned seam.The lubricated of axle sleeve 30.1,30.2 realized by pressure medium (preferably hydraulic fluid, especially oil).This pressure medium marginally flows by the bearing play existed by certain pressure reduction conditionally, and this bearing play is formed between axle sleeve 30.1,30.2 and live axle 32 separately.Alternatively, so-called oil groove can be set, it does not illustrate in the accompanying drawings yet.Connecting groove 34.1,34.2 is both on the first cover plate part 23, also on the second cover plate part 24, be arranged on the excircle for each hole 29,31 of axle sleeve 30.1,30.2 separately, this connecting groove 3 couples together coupler 35, or the chamber between the first cover plate part 23 of the end face that the relative with driving side of driving wheel 36 put and suction chamber 37.1 with pump chamber 26 couples together.For the axial pressing plate 38.1,38.2 that also will describe in detail below fixing, axle sleeve 30.1,30.2 separately is outstanding on the end face of cover plate part 23,24 on the direction of driving wheel 36 with certain size.

The driving wheel 36 of outer tooth processed is arranged on the inside of pump chamber 26.This driving wheel 36 torsionally is fixed on live axle 32.In an illustrated embodiment, this driving wheel 36 is constituent elements of the driving gear shaft 39 that is made into integration, in this driving gear shaft driving wheel 36 and live axle 32 monolithically, material in the same manner and no-welding-seam ground be connected.In other words, driving wheel 36 links into an integrated entity with live axle 32 in this embodiment.But should be understood that this driving wheel also can be used as independent member and torsionally is fixed on independent live axle.Driving wheel 36 has 13 driving wheels-tooth section 40 at this, but also can have driving wheel greater or less than 13-tooth section.This driving wheel 36 is positioned at the inside of the internal gear 42.1 of tooth processed.This internal gear 42.1 has 19 internal gears-tooth section at this, but also can have internal gear greater or less than 19-tooth section.The combination of other tooth section quantity is also feasible.In having the internal gear pump of so-called radial compensation, this tooth section quantity is poor is generally 7 or 6, also can consider that 5 or 4 tooth section quantity is poor.

According to the quantity of internal gear-tooth section 43, the internal gear-teeth groove 45 of respective numbers is set between internal gear-tooth section 43 on circumferencial direction 14.Each internal gear-teeth groove 45 is limited by the internal gear of two direct neighbors-tooth section 43 on circumferencial direction 14.Driving wheel 36 is rotatably mounted round driving wheel-spin axis 46.Internal gear 42.1 is rotatably mounted on circumferencial direction 44 round internal gear-spin axis 47.Driving wheel-spin axis 46 and internal gear-spin axis 47 extend in parallel with each other in imaginary speed changer plane 48.This speed changer plane 48 had both comprised driving wheel-spin axis 46, also comprised internal gear-spin axis 47.In the cross section of the drawing of pie graph 4, this driving wheel-spin axis 46 and internal gear-spin axis 47 form two imaginary points 49,50 on imaginary straight variator axis 51.Internal gear-spin axis 47 arranges towards driving wheel-spin axis 46 bias.As shown in Figures 2 and 4, internal gear-spin axis 47 and driving wheel-spin axis 46 have spacing 52 mutually, and it is the size of eccentricity of the bearing position of internal gear 42.1 and driving wheel 36.This internal gear 42.1 is bearing in the intermediate member 22 of housing 21 by external peripheral surface 54 on its excircle 53.By driving wheel-spin axis 46 with by 47 tensionings of internal gear-spin axis, zones also referred to as the both sides of the midplane on speed changer plane 48, these two gears 36,42.1 are engaged with each other, and this is external has falculate free space 55 between them.This free space 55 roughly half fills up by the filling block 56 preferably consisted of driving wheel-sections 57 and internal gear-sections 58.This filling block 56 is configured to binary in an illustrated embodiment.But should be understood that this filling block also can consist of the filling block parts more than two, also or be configured to monomer.Filling block 56 or its driving wheel-sections 57 abut in the driving wheel of driving wheel 36-tooth section 40, and filling block 56 or its internal gear-sections 58 abut in the internal gear of internal gear 42.1-tooth section 43.This filling block 56 is bearing on two pins of the filling block also referred to as stop pin or stay bolt 59.1,59.2 with its driving wheel-sections 57 and internal gear-sections 58.Each filling block pin 59.1,59.2 crosses the free space 55 in midplane 48.Each filling block pin 59.1,59.2 can be rotated to support in two blind holes 61.1,61.2 that flush each other, pref. cylindrical of

housing parts

23,24 in the both sides of pump chamber 26 by the axle head 60.1,60.2 of pref. cylindrical respectively.Filling block 56 is rotatably mounted by filling block pin 59.1,59.2 at this place.Axial expansion or the width 75 of the axial expansion of filling block 56 or width and these two gears 36,42.1 are harmonious.

Suction passage 62 leads in pump chamber 26, and this suction passage is staggeredly arranged with the angle of 180 degree in a circumferential direction relatively, or during pressure channel 63 leads to pump chamber 26 on the position of just in time relatively putting of the intermediate member 22 of housing 21.In should be understood that this suction passage and pressure channel also can lead to pump chamber on the position be staggeredly arranged each other with 90 degree or with other angle with being staggeredly arranged each other.The diameter of suction passage 62 is preferably greater than the diameter of pressure channel 63.

Suction passage 62 leads in the area of low pressure also referred to as low-pressure cavity 64 of pump chamber 26 by the suction bag of extending with certain angle of circumference on circumferencial direction 44.This area of low pressure 64 can be subordinated to the following zone of pump chamber 26, and this zone starts to extend filling block 5 by the tooth section separated from one another 40,43 of gear 36,42.1 from the tooth meshing zone 65 of meshed gears 36,42.1 when internal gear pump 20 running always.This pressure channel 63 leads in the high-pressure area also referred to as hyperbaric chamber 66 of pump chamber 26 by the pressure bag extended with certain angle of circumference on circumferencial direction 44.This high-pressure area 66 can be subordinated to the following zone of pump chamber 26, this zone starts to extend to tooth section 40, the 43 intermeshing tooth meshing zones 65 of gear 36,42.1 always from the pressure initiation zone 67 of pump chamber 26, this pressure initiation zone 67 roughly is equivalent to following zone when internal gear pump 20 running, in the

tooth section

40,43 of this zone middle gear 36,42.1, arrives at the zone that is provided with stop pin or filling block pin 59.1,59.2 of filling block 56 or filling block 56.

Should be understood that the suction side and on the pressure side and the guiding structure of pressure medium in case of necessity also can be designed to other form.For example suction passage and pressure channel also can axially extend.Suction passage also can axially extend, and pressure channel radially extends; Perhaps suction passage radially extends, and pressure channel axially extends.The diameter of suction passage or equally large with the diameter of pressure channel.Also can there is other moulding in suction and/or pressure span.

Internal gear 42.1 has radial indentation 70.1,70.2,70.3, and its quantity is equivalent to the quantity of internal gear-teeth groove 45.Each breach 70.1,70.2,70.3 forms by columniform hole 71.This hole 71 is radially outward opened wide towards the outer peripheral surface 54 of internal gear 42.1.Hole 71 is radially led in axial slits 72 on the direction inwardly, and it extends and be unlimited towards tooth root or internal gear-teeth groove separately 45 separately on axial direction 73.In other words, it is starting point that breach 70.1,70.2,70.3 be take respectively outer cover or the outer peripheral surface 54 of internal gear 42.1, leads to respectively in the tooth root of the internal gear of the direct neighbor of internal gear 42.1-tooth section 43.Each breach 70.1,70.2,70.3 radially opens wide towards the internal gear-teeth groove 45 under separately on the one hand on direction inwardly, and on the other hand radially on direction outwardly the excircle 53 towards internal gear 42.1 open wide.Each breach 70.1,70.2,70.3 forms radially by the interior fluid output that penetrates internal gear 42.1 outwardly.

By the radial indentation 70.1,70.2,70.3 in internal gear 42.1, make pressure medium to be conveyed from entering or suction passage 62 flows into pump chambers 26.By the breach 70.1,70.2,70.3 that is configured to fluid-outlet, pressure medium to be conveyed can flow into the free space 55 of pump chamber 26 from suction passage 62, and arrives in pressure channel 63 from this.In addition, pressure medium distolateral 74.1,74.2 the arriving in the free space 55 of pump chamber 26 away from each other on axial direction 73 of two by internal gear 42.1 from suction passage 62 also.

Internal gear 42.1 by the first structural form has been shown in Fig. 5 to 7, and has figure 8 illustrates the internal gear 42.2 by two structural forms.At first the common trait of two structural forms of internal gear 42.1,42.2 has below been described:

These two internal gears 42.1,42.2 have identical width 75, identical external diameter 76 and identical internal gear thickness 78, and their internal gear teeth section 43 has identical tip diameter 77.In addition, identical element also arranges or indicates identical reference character.In each internal gear 42.1,42.2, a plurality of breach 70.1 in breach 70.1,70.2,70.3 are arranged with angle of circumference 80.1 each other in the first circular row 79.1 and circumferencial direction 44.In addition, a plurality of breach 70.2 in breach 70.1,70.2,70.3 are arranged with angle of circumference 80.2 each other in the second circular row 79.2 and circumferencial direction 44.The breach 70.1 of the first circular row 79.1 is staggeredly arranged on axial direction 73 with the axial spacing 81 of formed objects respectively with respect to the breach 70.2 of the second circular row 79.2.The breach 70.1 of the first circular row 79.1 is arranged in the first common plane 82.1 in the imagination, and the breach 70.2 of the second circular row 79.2 is arranged in the second common plane 82.2 in the imagination.Correspondingly, the first plane 82.1 and the first circular row 79.1 are staggeredly arranged with axial spacing 81 on axial direction 73 with respect to the second plane 82.2 and the second circular row 79.2.The first plane 82.1 arranges respectively vertically with internal gear-spin axis 47 with the second plane 82.2.Press the utility model, each breach 70.2 in scarce each mouthful 70.2 of the second circular row 79.2 is staggeredly arranged on circumferencial direction 44 with respect to the breach 70.1 of each the direct neighbor setting on axial direction 73 in each breach 70.1 of the first circular row 79.1.Jagged 70.1,70.2,70.3 all construct identically.But should be understood that the breach that different shaping also can be set.

Shown in Fig. 5 to 7, there is odd number internal gear-tooth section 43 by the internal gear 42.1 of the first structural form, and correspondingly there is the odd number internal gear-teeth groove 45 of as much.In an illustrated embodiment, be provided with 19 internal gears-tooth section 43, and correspondingly be provided with 19 heart wheel-teeth groove 45.But should be understood that internal gear-tooth section and heart wheel-teeth groove also can have other Odd number.This internal gear 42.1 has 19 radial indentation 70.1,70.2,70.3 altogether.In these 19 breach 70.1,70.2,70.3, in the first common plane 82.1 of 9 breach 70.1 be arranged on the imagination in the first circular row 79.1 in.In described 19 breach 70.1,70.2,70.3, in the second common plane 82.2 of 9 other breach 70.2 be arranged on the imagination in the second circular row 79.2 in.In these 19 breach 70.1,70.2,70.3, especially there are 18 breach 70.1,70.2,70.3 to be arranged in two circular row 79.1 and 79.2.

A unique breach 70.3(in these 19 breach 70.1,70.2,70.3 its also referred to as the 3rd breach 70.3) see in the axial direction the 83 center, internal gear zone that is arranged on internal gear 42.1, between the second breach 70.2 in each breach 70.2 of first breach 70.1 of this internal gear region division in each breach 70.1 of the first circular row 79.1 and the second circular row 79.2, wherein said the first breach 70.1 and described the second breach 70.2 arrange directly with the direct adjacency of described unique breach 70.3.In other words, described unique breach 70.3 is arranged on the center between the second plane 82.2 of the first plane 82.1 of the first circular row 79.1 and the second circular row 79.2 at axial direction 73.

In the internal gear 42.1 of the first structural form, the first circular row 79.1 jagged 70.1(except two breach of the first circular row 79.1, be below described the first breach 70.1) towards first angle of circumference 80.1 with formed objects at circumferencial direction 44 breach 70.1 that direct neighbors arrange respectively of this first circular row 79.1, arrange relative to each other.In addition, the second circular row 79.2 jagged 70.2(except two breach of the second circular row 79.2, be below described the second breach 70.2) towards second angle of circumference 80.2 with formed objects at circumferencial direction 44 breach 70.2 that direct neighbors arrange respectively of this second circular row 79.2, arrange relative to each other.At this, the first angle of circumference 80.1 and the second angle of circumference 80.2 equal and opposite in directions.

From shown in Fig. 5 to 7, different by the internal gear 42.1 of the first structural form, the internal gear by the second structural form 42.2 shown in Fig. 8 has even number internal gear-tooth section 43, and correspondingly has the even number internal gear-teeth groove 45 of as much.This internal gear 42.2 for example can have 18 internal gears-tooth section 43, therefore correspondingly is provided with 18 heart wheel-teeth groove 45.But should be understood that internal gear-tooth section and heart wheel-teeth groove also can have other even number.This internal gear 42.2 has 18 radial indentation 70.1,70.2 altogether.In these 18 breach 70.1,70.2,9 breach 70.1 are arranged in imaginary the first common plane 82.1 in the first circular row 79.1.In described 18 breach 70.1,70.2,9 other breach 70.2 are arranged in imaginary the second common plane 82.2 in the second circular row 79.2.Except these breach 70.1,70.2, other this or corresponding radial indentation is not set.

In the second structural form of the internal gear 42.2 with even number teeth groove 45, the first circular row 79.1 jagged 70.1 therewith first angle of circumference 80.1 with formed objects at circumferencial direction 44 breach 70.1 that direct neighbors arrange respectively of the first circular row 79.1 arrange relative to each other, and the second circular row 79.2 jagged 70.2 also therewith second angle of circumference 80.2 with formed objects at circumferencial direction 44 breach 70.2 that direct neighbors arrange respectively of the second circular row 79.2 arrange relative to each other, wherein the first angle of circumference 80.1 is that size is identical with the second angle of circumference 80.2.Correspondingly, in this internal gear 42.2 jagged 70.1,70.2 at circumferencial direction 44, by the breach 70.1,70.2 of direct neighbor separately, with identical angle of circumference 80.1,80.2, on circumferencial direction 44, be staggeredly arranged each other.Press the utility model, each breach 70.2 of the second circular row 79.2 is staggeredly arranged on circumferencial direction 44 with respect to each breach 70.1 in axial direction 73 direct neighbor settings in the breach 70.1 of the first circular row 79.1.At this, the second circular row 79.2 jagged 70.2 all with respect to the breach 70.1 at axial direction 73 direct neighbors of the first circular row 79.1, with certain angle of circumference, on circumferencial direction 44, be staggeredly arranged, this angle of circumference is the medium-sized of angle of circumference 80.1,80.2 between two breach 70.1,70.2 that direct neighbor arranges respectively on circumferencial direction 44 of circular row 79.1,79.2 separately.

Internal gear pump 20 shown in the drawings is to construct like this, i.e. driving wheel 36 (with reference to Fig. 4) 85 drivings in a clockwise direction in the running.So, internal gear 42.1 is 86 rotations in a clockwise direction also, and then it moves together in company with driving wheel 36.When internal gear pump 20 running, the driving wheel 36 of outer tooth processed is meshed with the internal gear 42.1 of interior tooth processed, and when rotating along clockwise 85, pressure medium 68 is transported on the pressure side to 69 from suction side.When internal gear pump 20 operation, the pressure medium that is arranged in the teeth groove 41,45 of gear 36,42.1 is transferred on filling block 56 by teeth groove 41,45, and arrive at 65(Ji high-pressure area, tooth meshing zone 66) in, in this zone, two gear rings of these two gears 36,42.1 always further embed alternately.In this high-pressure area 66, pressure medium penetrates in radial indentation 70.1,70.2, the 70.3 entry pressure passages 63 that the formation of internal gear 42.1 is fluid output.Simultaneously, by other of internal gear 42.1, form the breach of fluid output 70.1,70.2,70.3, the suction passage 62 of pressure medium from area of low pressure 64 sucks in the free space 55 of pump chambers 26.

In an illustrated embodiment, the sealing of the side of the first cover plate part 23 shown in pump chamber 26 and Fig. 1 and 2 left side be not it and shown in live axle 32 between carry out, but carry out in the scope of unshowned motor drive shaft.It and live axle 32 can be coupled or be coupled.By same unshowned coupling element, live axle 32 is realized synchronous by unshowned motor drive shaft.Live axle 32 has dihedron on the end of its driving side, is used for being coupled with coupling element.This coupling element turns round under the situation that pressure medium (especially oil) is arranged.Therefore, can realize permanent lubricating, and therefore realize long working life conditionally.

Driving wheel 36 and live axle 32(are driving gear shaft 39 in the embodiment shown) by high tensile steel, made, and carry out surperficial cure process.End face separately 88.1,88.2 at driving wheel 36 has stoped the high unallowed notch effect that obtains towards the radius 87.1,87.2 on intermediate location between live axle 32.Internal gear 42.1,42.2 is made by high tensile steel equally, and carries out surperficial cure process.Each tooth root on internal gear 42.1,42.2 is provided with radius.

Member and the measure that can realize so-called nose balance are described below:

In order to realize the greater efficiency of internal gear pump 20, the good axial seal of the high-pressure area 66 of internal gear pump 20 is necessary.It can be delimitated by the following zone of pump chamber 26, and filling block 56 is arranged in this zone and two immediately always tooth processed ground embeddings further at leisure in these filling block 56 back of gear 36,42.1.In order to realize good sealing, between 74.1,88.1,74.2,88.2 and two cover plate parts 23,24 of axial end of gear 36,42.1, be respectively arranged with the axial pressing plate 38.1,38.2 that also can be described as axial disk.It respectively by the pressure field 89.1,89.2 between it and corresponding cover plate part 23,24 axially towards gear 36,42.1 extruding.Should understand, if be provided with at least one axial pressing plate between the axial end of gear and at least one cover plate part in these cover plate parts, it respectively by the pressure field between it and corresponding cover plate part axially towards the side extruding of the sensing equidirectional of gear, also be enough to realize good sealing.Pressure field 89.1,89.2 separately forms by the notch in cover plate part 23,24 separately.It has respectively half falculate moulding (seeing Figure 12).Corresponding pressure field 89.1,89.2 direction in high-pressure area 66 and midplane 48 position spaced apart extend to the midplane 48 in the maximum tooth meshing zone of almost crossing between two gears 36,42.1.This pressure field also can be for example roughly from the foot of filling block or top start almost to extend to midplane near.The axial pressing plate 38.1,38.2 that pressure field 89.1,89.2 separately penetrates separately is communicated with aspect pressure medium with the high-pressure area 66 of internal gear pump 20.Each axial pressing plate 38.1,38.2 closely surrounds live axle 32 and filling block pin or filling block pin separately 59.1,59.2, and therefore in the plane perpendicular to gear 36,42.1, is fixed on to a great extent on their position.Axial pressing plate 38.1,38.2 separately has through hole 135, and the axle head separately of stay bolt separately or filling block pin 59.1,59.2 or projection 60.1,60.2 are rotatably stretched out with respect to axial pressing plate 38.1,38.2 separately by this through hole.That is, by axial pressing plate 38.1,38.2, realize the distolateral sealing of gear 36,42.1.They extend on whole pressure span 37.2, and by accordingly, preferably be arranged on pressure field 89.1,89.2 in two cover plate parts 23,24 and load on the side 92.2 of gear 36,42.1 dorsad with driving pressure.The root diameter that axially pressing plate 38.1,38.2 is radially crossed gear 36,42.1 with certain size extends to and sucks in zone 37.1 by variator axis 51 or speed changer plane 48 in the tooth meshing zone.The axial pressing plate 38.1,38.2 around by separately in the scope of stay bolt 59.1,59.2 is fixed in the radial direction.The cam 90 of axial pressing plate 38.1,38.2 separately exceeds on position knocking on its external diameter affiliated axle sleeve 30.1,30.2.Another cam 91(of axial pressing plate 38.1,38.2 separately is arranged on its external diameter it) axial pressing plate 38.1,38.2 is separately remained in position, rather than clamp.

Side 92.1 towards

cover plate part

23,24 and the sealing between pressure field separately 89.1,89.2 of axial pressing plate 38.1,38.2 separately realize by axial seal 93.1,93.2 and supporting ring 94.1,94.2 respectively.This axial seal 93.1,93.2 can preferably mainly be made by rubber or form.This axial seal 93.1,93.2 is configured to sickle shaped, and have around sealing the margin.The cross section that this axial seal 93.1,93.2 has similar circle.This axial seal 93.1,93.2 has at least one

cross bar

95,96, and it has stablized the shape of axial seal 93.1,93.2.In an illustrated embodiment, axial seal 93.1,93.2 separately has two this cross bars 95 and 96.Under the installment state of axial seal 93.1,93.2, these two

cross bars

95,96 mutually arrange with angle of circumference on circumferencial direction 44, and are extending in the radial direction respectively.The outer circumferential shape of axial seal 93.1,93.2 separately embeds in pressure field 89.1,89.2 separately in the

cover plate part

23,24 under separately in locking manner.

Each axial seal 93.1,93.2 arranges at least one independent supporting ring 94.1,94.2.It can preferably be made or be formed by high-intensity, resistant to elevated temperatures plastics.Supporting ring 94.1,94.2 separately under installment state cross-over connection under axial pressing plate 38.1,38.2 and the gap between the end face of affiliated cover plate 23,24.Supporting ring 94.1,94.2 is separately gone back type and is embedded in affiliated separately pressure field 89.1,89.2 with trickle gap in locking manner.Supporting ring 94.1,94.2 has a plurality of cams 97, and they are extending in supporting ring 94.1,94.2 surrounds supporting ring-inner chamber 98 towards interior in the plane of supporting ring 94.1,94.2.Therefore, the outward edge of supporting ring 94.1,94.2 does not have the injection moulding position of preferred unshowned injection mould or the mark of unshowned ejector, not affected by it.Cam 97 makes supporting ring 94.1,94.2 more easily by the injection moulding manufacture.Can there is the ejector mark in the scope of cam 97, also there is in case of necessity the injection moulding position.

This or each axial pressing plate 38.1,38.2 preferably consist of high-intensity brass alloys or aluminum alloy or bell metal.This or each axial pressing plate 38.1,38.2 are preferably made by punching press and casting by flat material.

In presetting gap 99.1,99.2, control hole 110.1,110.2, pressure port 101 and step-down notch, especially step-down groove 102.1 and/or gap 102.2 and extruding-pressure medium groove 103 can also or only be arranged on the side 92.2 reclined towards speed changer (towards driving wheel 36 with towards internal gear 42.1) on two axial pressing plates 238.1,238.2 on an axial disk.By the presetting gap 99.1,99.2 that also can be described as presetting indentation, the pressure initiation in the

teeth groove

41,45 of driving wheel 36 and internal gear 42.1 especially.These two step-down gaps 102.1,102.2 are used for controlling the pressure drop in tooth meshing zone 65.Alternatively, this point can be by one or two tooled joint gap 102.1,102.2(as described in the embodiment shown) realize.By these measures, the running fluctuation that can make internal gear pump 20 less and noise few.By come pilot pressure to form by presetting gap 99.1,99.2, can make the crown of the

tooth section

40,43 of gear 36,42.1 move on

sections

57,58 without wearing and tearing ground.Therefore, can again extend the working life of internal gear pump 20.

Member and the measure that can realize so-called radial compensation are described below:

In order to realize the high efficiency of internal gear pump 20, there is good sealing between the gear ring of the tooth section 40,43 of filling block 56 and driving wheel 36 and internal gear 42.1, be also necessary.Therefore, filling block 56 is configured to two parts, and forms by internal gear sections 58 also referred to as the sealing sections with also referred to as the driving wheel sections 57 of sections carrier.This internal gear sections 58 and internal gear 42.1 adjacency, and can the crown extruding towards the internal gear of internal gear 42.1-tooth section 43 by a small amount of redundant force.58 of this internal gear sections abut on tip diameter 77 with the outside 104 or on the gear ring of internal gear 42.1.In addition, internal gear sections 58 when internal gear pump 20 running also hydraulically towards scabbling place or towards the first stop surface 106 extruding of stop pin or filling block pin 59.1,59.2.So, internal gear sections 58 abuts on first supporting surface or stop surface 106 of stop pin or filling block pin 59.1,59.2 with the first supporting or stop surface 128.1.This driving wheel sections 57 and driving wheel 36 adjacency, and can the crown extruding towards the driving wheel of driving wheel 36-tooth section 40 by a small amount of redundant force.57 of this driving wheel sections abut on tip diameter 108 with inboard 109 or on the gear ring of driving wheel 36.

These two sections 57,58 are preferably made by high-intensity, anti abrasive brass or bell metal.Driving wheel sections 57 has the width identical with two transmission components (driving wheel 36 and internal gear 42.1) in axial direction 73.The internal diameter of driving wheel sections 37 preferably is greater than the tip diameter 108 of driving wheel 36 in the scope of one of percentage millimeter.Internal gear sections 58 also has and the width identical with two transmission components (driving wheel 36 and internal gear 42.1) on axial direction 73.It extends equally on the whole axial width 75 of driving wheel 36 and internal gear 42.1.The external diameter of internal gear sections 38 is less than the tip diameter 77 of internal gear 42.1 in the scope of one of percentage millimeter.Filling block 56(or driving wheel sections 57 and internal gear sections 58) can there is at least one distolateral groove 111.1,111.2.In an illustrated embodiment, filling block 56 preferably has two that open wide on axial direction 73, distolateral grooves 111.1,111.2 on inverse direction.Their effect is, filling block 56 or driving wheel sections 57 and internal gear sections 58 are remained on their position.For this reason, two filling block pins 59.1,59.2 that also are called stay bolt stretch in the groove 111.1,111.2 of sections 57,58 with corresponding projection or axle head 60.3,60.4, and this filling block pin can be rotated to support in cover plate part 23,24.Should be understood that a unique filling block pin also can only be set, it can be bearing in in these cover plate parts, and it can stretch in the groove of sections with corresponding projection.Projection 60.3,60.1 separately consists of dihedron 112, and it has two sides 113.1,113.2 parallel, that extend on inverse direction.The size of this dihedron 112 is to set like this, between the wall member of dihedron 112 and two sides 113.1,113.2, exists certain gap, and this wall member has formed the boundary of groove 111.1,111.2 on circumferencial direction 44.

Sections 57,58(are driving wheel sections 57 and internal gear sections 58) two mutually in the face of or opposed surperficial 105,110 there is different grooves and protuberance.The first groove 114 in driving wheel sections 57 is the reference grooves for the manufacture of process, and it starts at groove 111.2 places of the protuberance 60.4 for filling block pin 59.2 or stay bolt.On circumferencial direction 44, further towards filling block tip 115, be staggeredly arranged, or, further away from each other for the groove 111.1,111.2 of described projection 60.3,60.4, driving wheel sections 57 and internal gear sections 58 all have notch 116,117.The notch 117 of internal gear sections 58 is configured to groove.The notch 116 of driving wheel sections 57 is configured to step.The notch 117 of internal gear sections 58 and the notch 116 of driving wheel sections 57 are respectively arranged with inclined-plane 116,117, and they tilt respectively on the direction in the gap 120 towards between driving wheel sections 57 and internal gear sections 58.These two inclined-planes 116,117 arrange and are configured roughly symmetrical.Inclined-plane 116,117 surrounds the angle of wedge 121.This angle of wedge 121 preferably is roughly respectively 90 degree.These two notches 116,117 form wedge slot 123 together.Be provided with seal element (especially seal roll 124) in this wedge slot 123, it preferably has circular cross section.Should be understood that also can arrange to surpass a seal roll, therefore a plurality of seal roll are set.Should be understood that in addition these seal roll can be arranged in leaving a blank separately with being staggeredly arranged each other on sense of rotation or circumferencial direction.Sealing roller 124 both had been pressed against on the wedge surface or inclined-plane 118 of notch 116 of driving wheel sections 57, also was pressed against on the wedge surface or inclined-plane 119 of notch 117 of internal gear sections 58.

Under stress-free state, by least one leaf spring also referred to as the seal roll spring 125, press sealing roller 124.This leaf spring 125 is supported on the abutment face 126 of internal gear sections 58, and this stop surface delimited the border of notch or the groove 117 of internal gear sections 58.

Preferably the seal roll dish 122 especially consisted of flat material can be set between leaf spring 125 and seal roll 124.When internal gear pump 20 running, seal roll 124 by pump pressure or the pressure by pressure medium towards wedge surface 118,119 extruding.When internal gear pump 20 running, seal roll 124 is basically by pressure or pump pressure 118,119 extruding towards inclined-plane of pressure medium.Therefore stop, pressure medium (for example high pressure oil) flows to low voltage side or area of low pressure 64 gap from Huo Cong high-pressure area, high pressure side 66 between driving wheel sections 57 and internal gear sections 58.Sealing roller 124 can preferably be made by high-intensity, resistant to elevated temperatures plastics, and it has less thermal expansion coefficient.But the material that the sealing roller also can be suitable by other forms or makes.The length of seal roll 124 is equivalent to the width of transmission components usually, i.e. the width 75 of driving wheel 36 and internal gear 42.1.When internal gear pump 20 running, till the pump pressure in high-pressure area 66 is applied to seal roll 124, and load that driving wheel sections 57 is put with the relative of internal gear sections 58 or inner surface 105,110.Both tip diameter 77 extruding towards internal gear 42.1 by internal gear sections 58 of consequent power, and tip diameter 108 extruding towards driving wheel 36 by driving wheel sections 57.This at least one filling block pin or stay bolt or these filling block pins or stay bolt 59.1,59.2 receive corresponding radial force at this, and keep the position of these two sections 57,58.On the direction of the tip diameter 77,108 of affiliated gear 36,42.1, sections 57,58 slides on supporting surface 113.1, the 113.2 upper supports ground of the dihedron 112 of filling block pin or stay bolt 59.1,59.2.Towards variator axis 51 or towards midplane or speed changer plane 48(, it had both had driving wheel-spin axis 46 to these supporting surfaces 113.1,113.2, also had internal gear-spin axis 47) there is angle 127.This angle 127 is about 12 degree in the embodiment shown.According to the ratio of the number of teeth of driving wheel and internal gear, but this angle also can have the value between zero degree and 20 degree.Therefore, but size deviation when both balance had been manufactured, but the variation that also balance for example, causes due to operating pressure, temperature and operating conditions (lubrication gap caused by rotating speed and viscosity changes).

As above-mentioned, from one or both sides, so-called presetting groove is arranged on axial pressing plate 38.1,38.2.They are configured to presetting gap 99.1,99.2 in an embodiment.These presetting gaps 99.1,99.2 are extended with respect to the internal pressure loaded surfaces of

sections

57,58 basically in this zone.By presetting gap 99.1,99.2, control the pressure initiation in the

teeth groove

41,45 of driving wheel 36 and internal gear 42.1.The layout in these presetting gaps 99.1,99.2 and the position of seal roll 124 are so mutual coordinations, only have a small amount of redundant force to be applied to

sections

57,58 is abutted on tip diameter 77,108, or abut on the crown of driving wheel 36 and internal gear 42.1.Therefore, between the tip diameter 77 of the external diameter of internal gear sections 58 or outer peripheral surface 54 and internal gear 42.1, and realize almost gapless sealing between the tip diameter 108 of the internal diameter of driving wheel sections 57 or inner peripheral surface 109 and driving wheel 36.

Both can on driving wheel sections 57, also can on internal gear sections 58, bring into play the effect of function aspects by crossing filling block pin or stay bolt 59.1,59.2 these two sections, 57,58, the second stop surfaces 128.2,129.2 of prolongation on the direction that sucks zone 37.1.When turning round without pressure also or when internal gear pump 20 entry into service, the effect of the second stop surface 128.2,129.2 is, these two

sections

57,58 can be conditionally by the frictional force pulling force, because

sections

57,58 abuts on the second stop surface 107 of filling block pin or stay bolt 59.1,59.2 by its second stop surface 128.2,129.2 in wedge shape pressure chamber 131.

By seal roll 124, in the filling block gap 120 existed between driving wheel sections 57 and internal gear sections 58, formed towards the pressure chamber 132 of 66He area of low pressure, high-pressure area 64 sealings of internal gear pump 20.In the embodiment shown in the figures, this pressure chamber 132 when internal gear pump 20 running by whole running pressure-loaded.Therefore, except leaf spring 125, preferably also by additional springs 133, the pressure by pump pressure or pressure medium presses off mutually by seal roll 124 for driving wheel sections 57 and internal gear sections 58, this additional springs is arranged in the scope at filling block tip 115 in case of necessity, for example be arranged in the notch or groove 130 of internal gear sections 58, and can be leaf spring 133 equally.This pressure is equivalent to whole running pressure basically.

Claims

1. an internal gear machine, it has housing (21), be provided with two meshed gears (36 in tooth meshing zone (65) in this housing, 42.1, 42.2), described gear refers to the driving wheel (36) of outer tooth processed and the internal gear (42.1 of interior tooth processed, 42.2), this internal gear supports prejudicially about this driving wheel (36), wherein, this driving wheel (36) is rotatably mounted around driving wheel-spin axis (46), and wherein, this internal gear (42.1, 42.2) upper rotatably mounted round the internal gear-spin axis (47) in axially (73) upper extension at circumferencial direction (44), this internal gear (42.1 wherein, 42.2) there is a plurality of internal gears-tooth section (43), described internal gear-tooth section defines internal gear-teeth groove (45) at circumferencial direction (44), and wherein, this internal gear (42.1, 42.2) there are a plurality of breach (70.1 that extend transverse to axial direction (73) at horizontal direction (134) respectively, 70.2, 70.3), these breach lead to respectively in the internal gear-teeth groove (45) in described internal gear-teeth groove (45), and described breach is respectively towards internal gear (42.1, 42.2) outer peripheral surface (54) open wide, these breach (70.1 wherein, 70.2, 70.3) in a plurality of breach (70.1) in the first circular row (79.1) and circumferencial direction (44), with an angle of circumference (80.1), arrange relative to each other, wherein, these breach (70.1, 70.2, 70.3) in a plurality of breach (70.2) in the second circular row (79.2) and circumferencial direction (44), with an angle of circumference (80.2), arrange relative to each other, and wherein the breach (70.2) of the second circular row (79.2) is staggeredly arranged on axial direction (73) with respect to the breach (70.1) of the first circular row (79.1), and/or wherein the first circular row (79.1) is staggeredly arranged on axial direction (73) with respect to the second circular row (79.2), it is characterized in that, each breach (70.2) in the breach (70.2) of the second circular row (79.2) is staggeredly arranged on circumferencial direction (44) with respect to each breach (70.1) arranged at axial direction (73) direct neighbor in the breach (70.1) of the first circular row (79.1).

2. internal gear machine according to claim 1, it is characterized in that, the breach (70.1) of the first circular row (79.1) is staggeredly arranged on axial direction (73) with the axial spacing (81) of formed objects respectively with respect to the breach (70.2) of the second circular row (79.2).

3. internal gear machine according to claim 1, it is characterized in that, the breach (70.1) of the first circular row (79.1) is arranged in imaginary public the first plane (82.1), and the breach (70.2) of the second circular row (79.2) is arranged in imaginary public the second plane (82.2).

4. internal gear machine according to claim 3, is characterized in that, the first plane (82.1) and the second plane (82.2) are staggeredly arranged each other with axial spacing (81).

5. according to the described internal gear machine of claim 3 or 4, it is characterized in that, the first plane (82.1) arrange respectively vertically with internal gear-spin axis (47) with the second plane (82.2).

6. according to the described internal gear machine of one of claim 1 to 4, it is characterized in that, internal gear (42.1) has odd number internal gear-teeth groove (45), or has even number internal gear-teeth groove (45).

7. internal gear machine according to claim 1, it is characterized in that, at least one the 3rd breach (70.3) in these breach (70.1,70.2,70.3) is arranged in the internal gear zone (83) of internal gear (42.1), and this internal gear zone is arranged between the second breach (70.2) in the breach (70.2) of the first breach (70.1) in the breach (70.1) of the first circular row (79.1) and the second circular row (79.2) at axial direction (73).

8. internal gear machine according to claim 1, it is characterized in that, unique the 3rd breach (70.3) in these breach (70.1,70.2,70.3) is arranged in the internal gear zone (83) of internal gear (42.1), and this zone is arranged between the second breach (70.2) in these breach (70.2) of the first breach (70.1) in these breach (70.1) of the first circular row (79.1) and the second circular row (79.2) at axial direction (83).

9. according to the described internal gear machine of claim 7 or 8, it is characterized in that, described the 3rd breach (70.3) is arranged on the center in the internal gear zone (83) of internal gear (42.1) at axial direction (73), between the second breach (70.2) in these breach (70.2) of first breach (70.1) of this internal gear region division in these breach (70.1) of the first circular row (79.1) and the second circular row (79.2).

10. according to the described internal gear machine of claim 7 or 8, it is characterized in that, described the first breach (70.1) and described the second breach (70.2) arrange with described the 3rd breach (70.3) direct neighbor.

11. according to the described internal gear machine of one of claim 1 to 4, it is characterized in that, except two breach of the first circular row (79.1), the first circular row (79.1) first angle of circumference (80.1) with formed objects at circumferencial direction (44) breach (70.1) that direct neighbor arranges respectively of jagged (70.1) and this first circular row (79.1) arrange relative to each other, and/or except two breach of the second circular row (79.2), the second circular row (79.2) jagged (70.2) and this second circular row (79.2), the second angle of circumference (80.2) at circumferencial direction (44) breach (70.2) that direct neighbor arranges respectively with formed objects arranges relative to each other.

12. internal gear machine according to claim 11, is characterized in that, the first angle of circumference (80.1) and the second angle of circumference (80.2) equal and opposite in direction.

13. according to the described internal gear machine of one of claim 1 to 4, it is characterized in that, the first circular row (79.1) jagged (70.1) relative the first circular row (79.1), circumferencial direction (44) respectively the breach (70.1) of direct neighbor with first angle of circumference (80.1) of formed objects, arrange, with institute's jagged (70.2) relative second circular row (79.2) of the second circular row (79.2), circumferencial direction (44) respectively the breach (70.2) of direct neighbor with second angle of circumference (80.2) of formed objects, arrange.

14. internal gear machine according to claim 13, is characterized in that, the first angle of circumference (80.1) and the second angle of circumference (80.2) equal and opposite in direction.

15. according to the described internal gear machine of one of claim 1 to 4, it is characterized in that, the breach (70.1,70.2,70.3) in these breach (70.1,70.2,70.3) leads in each internal gear-teeth groove (45) of internal gear (42.1,42.2).

16. according to the described internal gear machine of one of claim 1 to 4, it is characterized in that, these breach (70.1,70.2,70.3) form by columniform hole (71).

17. according to the described internal gear machine of one of claim 1 to 4, it is characterized in that, this internal gear machine is internal gear pump (20) or internal gear motor.