DE8909012U1 - Adjustable connecting element for coupling two synchronously working parts - Google Patents

Description

Angelder:

South German Radiator Factory
Julius Fr. Behr GmbH & Co. KG
Hauserstrasse 3
7000 Stuttgart-30

89-B-10 0417 066 20.07.1S39

(89/135 H-S/cd

Title: Adjustable connection box for coupling two synchronously working parts

Description

The invention relates to an adjustable connecting element for coupling two synchronously operating parts, in particular shafts, flaps of a heating, ventilation or air conditioning system, with a shaft disk that can be firmly connected to the first part and a connecting disk that can be connected to the second part, which can be plugged together in different angles of rotation and can be secured against mutual rotation and axial displacement.

Such connecting elements are used, for example, between a servomotor and an air guide flap or between two flaps whose movements are to be synchronous. Using such an adjustable connecting element, the flaps or the shafts can be brought into a fixed angle of rotation position relative to one another and secured. This is necessary because, due to manufacturing tolerances or assembly inaccuracies, an exact assignment of synchronously working parts is usually not possible without additional adjustment elements. Furthermore, such connecting elements must also be able to transmit larger torques.

;. A connecting element of the type mentioned is known (DE-GH

&psgr; 88 03 503.4), in which the two coupling parts transmit torque through intermeshing teeth

and secured by means of a clamp. Such a connection must be manually set in the correct

% position and subsequently by means of the clamp attached to one of the coupling parts by sliding it on . This must be secured to both parts. The

Connection setting depends on the feeling of the installer and requires an additional handle to secure the

Connection.

The invention is based on the object of improving an adjustable connecting element of the type mentioned above so that the adjustment process of the kinematics, the

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For example, it couples two synchronously operating flaps, is designed to be easy to assemble and is simplified, and a greater degree of setting reliability and better connection security are achieved.

This object is achieved in that at least one clamp-like bayonet bracket is formed on a disk connecting the disks, by means of which the disks are held axially immovable and non-rotatable against each other after adjustment.

With this design, the two disc parts do not need to be secured against twisting and against axial displacement of the parts relative to one another using a separate assembly handle. By simply twisting the disc parts relative to one another, which has to be done during the adjustment process anyway, the connecting element is secured by the bayonet connection. High torques can be transmitted without the adjusted setting being lost.

In order to achieve the most secure bayonet connection possible, it is intended that distributed around the circumference of the wave washer, ||

preferably two bayonet brackets can be provided, which $ have a gripping arm with a projection, in particular in the form of an axially projecting toothing, and that the gripping arms with their projection or toothing in a

engage the teeth formed on the surface of the other connecting disc facing the arms,

It is particularly advantageous that the teeth of the gearing can have the shape of saw teeth, with different front and rear tooth flank pitches to determine an adjustment direction and an anti-twisting direction. The finer the tooth pitch of this gearing, the more precisely the adjustment of the two disks to each other can be made.

In a further embodiment of the invention, it is provided that when the disks are assembled and adjusted relative to one another, a toothed segment of the connecting disk is sandwiched between the gripping arms of the bayonet bracket and a holding segment of the wave disk and that the segments are held axially immovably and securely against rotation by the engagement of toothings formed on the facing surfaces of the segments and the engagement of the toothings of the bayonet bracket and the connecting disk. The arrangement of the parts relative to one another described ensures that an axial displacement of the disks relative to one another is not possible. The short connection of the holding segment to the outer circumference of a radially arranged flange of the wave disk, with the holding segment lying in the radial extension of the flange in the flange plane,

an opening angle range of approximately 20* to 40*, during the adjustment process, a locking and spring-loaded insertion of the toothed segment of the connecting disk between the holding segment and the bayonet bracket can be made possible.

In order to facilitate the insertion of the toothed segment of the connecting disc between the bayonet brackets and the retaining segment, the flange of the connecting disc can have a radially extending edge and be provided with insertion bevels starting from the edge on both flange surfaces in the flange edge area, with the toothed segment adjoining these.

In a further embodiment of the invention, the connecting disk can be provided with a preferably cylindrical centering pin and the wave disk with a corresponding centering recess, whereby easy rotation of the disks relative to one another is ensured and no additional radial securing measures are required to prevent the disks from drifting apart under lateral forces.

The discs can advantageously be made of plastic and preferably be injection-molded. Such injection-molded parts can be manufactured with little effort but with very high precision. Furthermore, the use of plastic ensures a certain spring force of the bayonet bracket and the

Holding segment when the discs engage with each other .

To accommodate a fastening pin of a Bowden cable, the connecting disc* can have a two-part hook flange in the flange plane. The two-part design of the hook flange should ensure that the wire of the Bowden cable is between the two hook parts

f§ and thus the fastening pin when adjusted

Adjustment of the folding mechanism secured in the hook flange /-.

To secure the connecting element in a corresponding receptacle of the flaps to be connected and working synchronously, a connecting pin can be provided on the shaft disk. This is advantageously designed in two parts with a spring and a safety hook, so that it only needs to be inserted into the corresponding receptacle of the flap, whereby an additional safety device can be omitted.

: To rotate the fastener discs against their

;> Adjustment direction to separate again jtiii- to

&kgr; twist, it is particularly advantageous that the

gg connecting disc can have a tool holder, in particular a central hexagon socket recess, into which a tool for rotating the connecting disc relative to the wave disc in the opposite direction to the adjustment direction can be inserted in order to release the connecting element.

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Further features and advantages of the invention emerge from the following description of the embodiment shown in the figures and can be found in the claims:

Figure 1

shows an air conditioning system with a Bowden cable running between two flaps and the adjustable connecting elements connected to the flaps,

Figure 2

shows a partial longitudinal section of the adjustable connecting element according to the invention,

Figure 3

shows a plan view of the connecting element shown in Fig. 2,

Figure 4

Figure 5 Figure 6

shows a bottom view of the connecting element shown in Fig. 2,

shows a partial longitudinal section through the wave washer of the connecting element according to Fig. 2.

shows a plan view of the shaft disk shown in Fig. S,

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shows a partial longitudinal section through the connecting disc of the connecting element according to Fig. 2,

Figure 8 shows a plan view of the device shown in Fig. &Iacgr; connecting disc, Figure 9- shows a schematic diagram of the interaction

the gear teeth provided on the discs to prevent rotation.

Figure 1 shows a view of a motor vehicle air conditioning system 1, which has two ventilation ducts (not shown) on the left and right sides, the cross-section of which can be changed by means of shut-off flaps running therein. The flaps are each connected to adjustable connecting elements 9, 10, which can be synchronized with the Bowden cable connected between them. The left adjustable connecting element 10 is used to adjust the length of the Bowden cable S arranged between the flaps. The assembly and adjustment is carried out in such a way that the Bowden cable 5 is first fastened in the connecting element shown on the right by means of a fastening pin 6 and then the left end of the Bowden cable is hooked onto the adjustable connecting element 10 with the fastening pin 7 attached to it. The two disk parts 20, 40,

which form the adjustable left connecting element 10, are rotated relative to one another so far when the right connecting element 9 and the flap connected to it are in a predetermined initial position - whereby a simultaneous "reverse rotation lock" of the discs takes place - _that the second connecting element 10 and the flap also come into this synchronous initial position - while the Bowden cable 5 is tensioned. If the right flap is now actuated, a synchronous transfer of the movement to the left ^flap takes place, whereby the adjustable connecting element 10 is moved against the spring force of a ^spring 8 from its initial position into the predetermined actuating position; When the direction of rotation is changed or the right flap is reset, the connecting element 10 is automatically pivoted back synchronously to the connecting element 9, whereby the tension in the 5 is maintained.

Figure 2 shows the two-part adjustable connecting element 10 from Figure 1 in a slightly modified form. This has two interlocking disks 20, 40 which can be put together in different angles of rotation and are mutually secured against rotation and axial displacement in order to transmit torque. The wave disk 20 (Figure 5) has a connecting pin 29 in its lower area which is essentially rectangular in cross section. This is axially slotted so that a two-part spring

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The design of the connecting pin 29 is given; the wave disk 20 can thus be easily inserted into a corresponding receptacle of one of the ventilation flaps, with the aid of a locking device 25 provided on one of the long sides of the connecting pin 29, the disk 20 is secured against axial displacement in the receptacle. The wave disk 20 has a cylindrical centering recess 30 coaxial with the connecting pin 29, in which a correspondingly shaped centering pin 46 of the connecting disk 40 can be received (Figures 1, 7). The two disks 20, 40 are thus aligned with one another, whereby easy rotation of the disks 20, 40 with respect to one another is ensured and no additional radial securing measures are required to prevent the disks 20, 40 from drifting apart under lateral forces.

The connecting disc 40 has, in order to connect with the Bowden cable 5

•I can be connected to a hook flange 45, which in

% disc plane is made in two parts and is formed by a flange 41 of the connecting disc 40. A

A two-part design of the hook flange 45 is useful in order, for example , to accommodate the wire of the Bowden cable 5 between the two hook parts when the fastening pin 7 of the Bowden cable 5 is accommodated in the hook flange 45 (Fig. 1).

Other designs of the respective connection concept of the discs 20, 40 to the to be connected

Machine elements are conceivable, especially in cases where, for example, two shafts are to be connected to one another and both the hook flange 45 and the connecting pin 29 are superfluous. A corresponding design of the receiving areas for the shafts could, for example, consist in the provision of central receiving bushes on the disks 20, 40 for the shafts to be connected.

The flange 41 already mentioned is arranged radially around the disk normal axis on the circumference of the connecting disk 40, whereby it only extends over a partial area of the circumference. It begins at a radial flange edge 48 and continues into the hook flange 45. In an outer radial partial area of the flange 41, a toothed segment 42 is formed, which in turn runs over a peripheral partial area of the flange 41 and is provided with a toothing 43, 43' on both flange surfaces, the teeth of which run in a radial direction, whereby the tooth tips do not protrude beyond the flange surfaces. The two flange surfaces in the flange edge area are provided with lead-in bevels 44, 44' starting at an acute angle from the radial flange edge 48, to which the toothed segment 42 is connected.

The wave disk 20 (Figures 5, 6) also has a radially extending flange 21 which is arranged only over a partial area of the circumference. On the outer circumference of the flange

21, a holding segment 27 is arranged in the flange plane in a radial extension of the flange 21. The holding segment 27 extends circumferentially over a partial area that includes an opening angle range of approximately 20 to 40°, with the radial edges of the segment 27 forming the area boundary. A toothing 28 is formed on the segment surface, which has radially extending teeth, the tooth tips of which protrude axially from the flange plane. A bayonet bracket 22, 22' is provided on the side and at a distance from the holding segment 27, the gripping arms 23 of which are held parallel and at a predetermined height to the flange plane by bayonet webs 25 running essentially perpendicular to the flange plane, which in turn are connected to the flange 21 via bayonet arms 26 lying in the flange plane and projecting radially from the flange 21. As can be seen from Figures 3 and 5, the bayonet arms 26 hold the bayonet webs 25 at such a distance from the central axis of the connecting element 10 that the peripheral edge of the flange 41 of the connecting disk 40 can be guided past the bayonet webs (25) when the disks 20, 40 are plugged together when the disks 20, 40 are rotated relative to one another. The gripping arms 23 have a radial toothing 24 protruding in the direction of the flange 21. The distance of the gripping arms 23 from the flange plane is selected such that when the disk parts 20, 40 are plugged together, the flange 41 of the connecting disk is between the gripping arm 23 and the surface of the flange 21.

can be pushed through with a force-fitting fit.

Figure 9 shows a schematic diagram in which the

Tooth arrangement and a preferred tooth embodiment are shown; it is intended to explain the principle of how the disks 20, 40 of the connecting element 10 are secured axially and radially to one another. As shown there, the tooth segment 42 of the connecting disk 40 is sandwiched between the gripping arms 23 of the bayonet brackets 22, 22' and the holding segment 27, with their respective teeth 24, 28, 43, 43' engaging with one another. The adjustment direction of rotation in the embodiment shown here runs from left to right, i.e. the connecting disk 40 is rotated clockwise with respect to the wave disk 20 (Fig. 3). The toothing 43 on the top of the toothing segment 42 is designed as a mirror image of the lower toothing 43' and has teeth 50 with an introduction flank 51 and a securing flank 52. The tooth shape is selected so that an interlocking is ensured when the respective toothings 24/43, 28/43' are in positive contact with one another and the inclination of the introduction flank 51 relative to the flange plane is less than that of the securing flank 52, which in extreme cases can be designed perpendicular to the flange plane.

The tooth shape, although preferred, does not necessarily have to be the same for all gears 24, 43, 43', as long as

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It is ensured that the intermeshing gears 24/43, 28/43' have identical teeth" 50, whereby a uniform and "equal tooth pitch must be given for all gears 24, 28,43,43'.

The insertion of the toothed segment 42 between the bayonet brackets 22, 22' and the holding segment 27 is carried out in such a way that |&iacgr; the radial flange edge 48 of the connecting disk 40 coming from the left with the insertion bevels 44, 44' expands the gripping arm 23 of the bayonet bracket 22' and the holding segment § 27 to tooth head height. When the

f connecting disks (40) with respect to the shaft disk (20)

a continuous interlocking of the individual gears 24,28,43,43' takes place, whereby the gears 24,28,4343" are held in engagement with one another by the spring force effect exerted by the bayonet brackets 22,22' via their gripping arms 23 and the holding segment 27 normal to the plane of the gear segment.

The effort required to twist the

H discs 20,40 depends on the inclination of the flanges 51, 52 as well as on the flexibility of the material of the bayonet brackets 22, 22' and the holding segment 27. The inclination of the flanks 51,52 of the intermeshing teeth 24, 28, 43, 43' X3t is chosen so that in the direction of insertion (twisting adjustment direction) an easier twistability (low inclination) and in the direction of locking a very difficult

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ft &igr; · &igr;&bull;&bull;■te· ·■

or there is no twistability (strong inclination).

Thus, the disks 20, 40 are prevented from rotating relative to one another in the opposite direction to the insertion direction by the locking flanks 52 of the toothings 24, 28, 43, 43', with the axial securing being provided by the gripping arms 23 of the bayonet brackets 22, 22'.

In order to facilitate rotation of the disks 20, 40 relative to one another, whether during the adjustment process or to release the connecting element 10 against the adjustment direction, the connecting disk 40 has a central hexagon socket recess running in the axial direction, which serves as a tool holder 47 for inserting an Allen key.

Claims (13)

&bull;&bull;&bull;&bull;(&bull;I ·· · <· ·· Sc. lutz claims 1. Adjustable connecting element (10) for coupling two synchronously operating parts, in particular shafts, flaps of a heating, ventilation or air conditioning system, including a shaft disk (20) connectable to the first part and a locking washer (40) connected to the second part, which can be plugged together in a wide variety of rotational angle positions and can be secured against mutual rotation and axial displacement, characterized in that at least one bayonet bracket (22) connecting the disks (20, 40) in a clamp-like manner is formed on a disk (20), by means of which the disks (20, 40) are held axially immovable and non-rotatable against one another after adjustment. 2. Connecting element according to claim 1, characterized in that distributed around the circumference of the wave disk (20), preferably two bayonet brackets (22, 22') are provided, which have an ore arm (23) with a projection, in particular in the form of an axially projecting toothing (21) and that the gripping arms (23) engage with their projections or toothings (24) in a toothing (43) which is formed on the surface of the connecting disk (40) facing the gripping arms (23). 3. Connecting element (10) according to claim 1 or 2, characterized in that in the assembled state and adjusted setting of the disks (20, 40) to each other, a toothed segment (42) of the connecting disk (40) sandwiches between the extension arms (21) of the bayonet brackets (22, 22') and a holding segment (U?) of the disc (20) is received on the ice reef E on facing surfaces (27.42) of the outer formations (28. 43 '), and the engagement of the toothing (24) of the connecting bracket (22,22') with the toothing (&Iacgr;&uacgr;) of the connecting disk (40), the disks (20,40) are held axially immovable and securely to one another. 4. Connecting element (10) according to claim 3, characterized in that a flange (41) arranged radially on the circumference of the connecting disk (40) has the toothing segment (42), wherein the toothing segment (42) is arranged in an outer radial partial region and extends over a peripheral partial region of the flange (41) and is provided with the toothing (43, 43') formed on both flange surfaces and equipped with radially extending teeth (50). 5. Connecting element (10) according to claim 4, characterized in that the flange (41) has a radially extending edge (48) and on both Flange surfaces in the flange edge area are provided with insertion grooves (44, 44') extending from the edge (48), with the toothed segment (42) adjoining these. 6. Connecting element (10) according to one of claims 3 to 5, characterized in that a flange (21) arranged radially on the circumference of the wave disk (20) has the holding segment (27), wherein the holding segment (27) on the outer circumference in radial extension of the flange (21) lying in flange planes comprises an opening angle range of approximately 20'-40* and the toothing (28) is formed with radially running teeth (50) on a surface of the holding segment (27). 7. Connecting element (10) according to one of claims 3 to 6, characterized in that a bayonet bracket (22, 22') is arranged laterally at a distance from the holding segment (27), wherein the gripping arms (23) are held parallel and at a predetermined height to the plane of the holding segment (27) by bayonet webs (25) which run approximately perpendicular to the flange plane and are connected to the flange (.21) via bayonet arms (26) lying in the flange plane and projecting radially from the flange (21). 8. Connecting element (10) according to one of claims 3 to 7, &id; 555S &id; » * characterized in that the teeth (SO) of the toothings (24, 28, 43, 43') have the shape of saw teeth with different front and rear tooth flank pitches for determining an adjustment direction and an anti-twisting direction. 9. Connecting element (10) according to one of claims 1 to 8, characterized in that the discs (20, 40) are made of made of plastic and are preferably injection-molded. 10. Connecting element (10) according to one of claims 1 to 9, characterized in that the connecting disc (40) with a cylindrical centering pin (46) and the wave disc (20) with a corresponding Centering recess (30). 11. Connecting element (10) according to one of claims 1 to 10, characterized in that the connecting disc (40) has a hook flange (45) made in two parts in the flange plane, which serves as a receptacle for the fastening pin of a Bowden cable. 12. Connecting element (10) according to one of claims 1 to 11, characterized in that the wave washer (20) has a ,-. connecting pin (29) which is used for fastening in | %■■■ a corresponding recording of one of the U to be connected &diams; · III· ·· III) »I I' &bull; It · · · · · I t &bull; III ·· · · I » ■ _ 20 &mdash; * · · » · t e * e · ■ ■ IHl t" ti < »· ir synchronously operating flaps. 13. Connecting element (10) according to one of claims 1 to 12, characterized in that the connecting disk (40) has a tool holder (47), in particular a central hexagon socket recess, into which a tool for rotating the connecting disk (40) relative to the wave disk (20) can be inserted in the opposite direction of the setting direction in order to release the connecting disk (10).