CN213616050U

CN213616050U - Electric spindle assembly for high-speed grinding

Info

Publication number: CN213616050U
Application number: CN202022321409.7U
Authority: CN
Inventors: 杨文杰
Original assignee: Zhejiang Aijingji Technology Co ltd
Current assignee: Zhejiang Aijing Machine Technology Co.,Ltd.
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-07-06
Anticipated expiration: 2030-10-19

Abstract

The utility model discloses an electric main shaft component for high-speed grinding, which comprises a shell component, a main shaft arranged in the shell component and an armature component used for driving the main shaft to rotate; the main shaft is provided with an extending end extending out of the shell component; bearings supported at two ends of the main shaft are arranged in the shell assembly, wherein a lubricating mechanism is arranged between the bearings and the shell assembly; the lubricating mechanism comprises a lubricating channel arranged on the shell component and a lubricating through hole arranged on the bearing outer ring and communicated with the lubricating channel. The electric main shaft assembly is lubricated by oil mist gas, and the oil mist gas enters a lubricating through hole of the bearing outer ring through a lubricating channel of the shell assembly and is injected into a roller path of the bearing to lubricate the bearing. The electric spindle assembly can be used for directly lubricating a raceway of a bearing at a high rotating speed, has low consumption of lubricating oil, enhances the lubricating effect of the bearing, improves the performance and the service life of the bearing, and reduces the cost of compressed air.

Description

Electric spindle assembly for high-speed grinding

Technical Field

The utility model relates to a technical field of electricity main shaft, concretely relates to electricity main shaft subassembly is used in high-speed grinding.

Background

High-speed cutting, precision manufacturing and numerical control technologies have become important components of modern advanced manufacturing technologies, and are important bases for realizing the development of national manufacturing technologies and equipment industries towards modern technologies. High speed, high precision and high efficiency are always the main targets pursued by the numerical control machine tool, and the main shaft unit of the machine tool is taken as a key functional part of the numerical control machine tool and is a key factor influencing the realization of the high speed, high precision and high efficiency targets of the machine tool.

Chinese patent No. CN202428317U discloses a "high-power internal grinding electric spindle". The high-power internal grinding electric spindle comprises a spindle body, a shell, a front cover, a rear cover, a handle, a rotor stator system and a lead-out wire, wherein the front cover comprises a small front cover and a large front cover, the front end of the spindle body is sleeved on the inner side of the large front cover through an angular contact ball bearing assembly, the large front cover is provided with a rear flange, the small front cover is fixed on the front end of the large front cover to form a front flange, two ends of the outer ring of the angular contact ball bearing assembly are respectively pressed on the front flange and the rear flange, one end of the inner shaft sleeve of the bearing assembly is pressed on a shaft shoulder of a rotating shaft, and the other end of the inner shaft sleeve is pressed and fixed by a front. One end of the inner shaft sleeve of the bearing group is pressed on a shaft shoulder of the rotating shaft, and the other end of the inner shaft sleeve is tightly pressed and fixed by the front nut through threaded connection. However, after the oil mist gas of the grinding motorized spindle enters the lubricating channel on the housing, the oil mist gas enters the opening between the inner ring and the outer ring of the bearing through the gap between the outer spacer and the inner spacer, so that lubricating oil is dispersed among the spacers, and the oil mist gas amount lubricated by the bearing is not favorably and accurately controlled, so that the consumption of the oil mist gas is high, the service performance of the bearing is influenced, and the cost of compressed air is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the above-mentioned problem to existence among the prior art provides an electricity main shaft subassembly for high-speed grinding, its electricity main shaft subassembly is equipped with a lubrication mechanism between bearing and shell subassembly, lubrication mechanism including set up the lubrication channel on the shell subassembly with set up on the bearing outer lane and with the lubrication through-hole of lubrication channel intercommunication, the gaseous lubricated passageway back that gets into on the shell subassembly of oil mist, directly pour into the raceway of bearing in through the lubrication through-hole on the bearing outer lane, reach the purpose that carries out direct lubrication to the bearing with this, can realize carrying out accurate control to the gaseous volume of oil mist, thereby improve the limit speed of bearing, strengthen the lubricated effect of bearing, improve the life of bearing. The problem of when electric main shaft assembly used oil mist gas lubrication, lubricating oil spreads, is unfavorable for carrying out accurate control to the gaseous volume of bearing lubricated oil mist, causes the gaseous consumption of oil mist big, influences the performance of bearing, compressed air's with high costs technical problem is solved.

In order to solve the technical problem, the utility model is realized by the following technical scheme:

an electric spindle assembly for high-speed grinding comprises a shell assembly, a spindle arranged in the shell assembly and an armature assembly used for driving the spindle to rotate; the main shaft is provided with an extending end extending out of the shell component; bearings supported at both ends of the main shaft are arranged in the shell assembly; wherein a lubricating mechanism is arranged between the bearing and the shell component; the lubricating mechanism comprises a lubricating channel arranged on the shell component and a lubricating through hole arranged on the bearing outer ring and communicated with the lubricating channel, so that after oil mist gas enters the lubricating channel on the shell component, the oil mist gas is directly injected into a roller path of the bearing through the lubricating through hole on the bearing outer ring, the scattering of lubricating oil is avoided, the amount of the oil mist gas for lubricating the bearing is conveniently and accurately controlled, the consumption of the lubricating oil is reduced, the service performance and the service life of the bearing are improved, and the cost of compressed air is reduced.

Further, the shell subassembly is established including the cover the main shaft is close to stretch out the sleeve of end department, set up and be in preceding big lid, the cover on the sleeve terminal surface are established stretch out to serve and set up shield on the preceding big lid terminal surface with be close to the rear end of main shaft sets up back lid on the sleeve terminal surface for the constitution of shell subassembly's structure.

Furthermore, the lubricating channel comprises a lubricating hole arranged on the cylinder wall of the sleeve along the axial direction and a lubricating hole which is arranged on the front big cover along the axial direction and the radial direction in a communicating manner, is used for forming the lubricating channel and is communicated with the lubricating through hole on the outer ring of the bearing, and is convenient for realizing the transmission of oil mist gas and the lubrication of the bearing.

Furthermore, the bearings are angular contact bearings and are respectively supported and arranged between the main shaft and the front big cover and between the rear end and the sleeve, so that the bearings are supported on the main shaft at intervals, the force action point span on the main shaft is increased, the rigidity of the extending end of the main shaft is improved, the circular runout error of the main shaft during rotation is reduced, and the rotation stability of the main shaft is maintained.

Further, the shell assembly further comprises a front bearing seat arranged between the bearing and the front big cover and a rear bearing seat arranged between the bearing at the rear end and the sleeve, and the lubricating channel further comprises lubricating holes arranged on the front bearing seat and the rear bearing seat along the radial direction, is used for forming the structure of the shell assembly and the lubricating channel and is communicated with the lubricating through hole on the outer ring of the bearing, and is convenient for conveying oil mist gas and lubricating the bearing.

Further, the shell assembly further comprises a rear bushing disposed between the rear bearing seat and the sleeve and a spring pad disposed between the rear bearing seat and an opposite end surface of the rear cover; a plurality of rolling guide sleeves are arranged between the rear bushing and the rear bearing seat; a plurality of counter bores are formed in the end face, opposite to the spring pad, of the rear bushing, and elastic elements are arranged in the counter bores; one end of the elastic element extending out of the counter bore is abutted against the end face of the spring pad; lubricating holes are axially formed in the corresponding positions of the rear cover and the rear bearing seat, and a hollow pin penetrating through the spring pad and connected with the lubricating holes is arranged between the rear cover and the rear bearing seat; the radial lubrication hole of the rear bearing seat is communicated with the axial lubrication hole, is used for forming a structure of the shell assembly and a lubrication channel and is communicated with the lubrication through hole on the outer ring of the bearing, so that the oil mist gas can be conveniently conveyed and the bearing can be lubricated, and meanwhile, the bearing preload adopts an elastic loading mode, so that the high rotating speed and the higher rigidity of the main shaft can be favorably realized.

Further, a gas seal mechanism is arranged on the shell assembly and comprises a gas seal channel arranged on the shell assembly; the outlet of the air seal channel is arranged on the shell component close to the extending end of the main shaft, and the outlet of the air seal channel is arranged along the radial direction of the main shaft and used for sealing the electric main shaft component, so that impurities are prevented from entering between the shell component and the main shaft, the influence of the impurities on the main shaft in the shell component is reduced, and the service life of the electric main shaft component is prolonged.

Further, the shell assembly further comprises a small front cover arranged between the dust cover and the front bearing seat, and the small front cover is arranged on the end face of the front bearing seat; the gas seal channel comprises a rear cover, an axial gas seal hole and a structure component, wherein the axial gas seal hole is formed in the sleeve, the gas seal hole is formed in the front large cover, the front bearing seat and the front small cover and is communicated with the front small cover in the axial direction and the radial direction, an outlet of the gas seal channel is formed in the front small cover in the radial direction of the main shaft and used for forming the structure component of the gas seal channel, gas is provided for sealing the electric main shaft assembly, impurities are prevented from entering the space between the shell assembly and the main shaft, the influence of the impurities on the main shaft in the shell assembly is reduced, and the service life of the electric main shaft assembly.

Furthermore, the electric spindle assembly is provided with a cooling channel, the cooling channel comprises a cooling hole arranged on the rear cover and the sleeve, a cooling hole arranged on the front big cover and communicated along the axial direction and the radial direction, and a cavity formed by a groove on the outer circumference of the front bearing seat and the front big cover, and the cooling channel is structurally composed so as to facilitate the heat dissipation of the electric spindle assembly.

Further, the armature assembly includes a rotor wound on the main shaft and a stator provided on an inner circumference of the sleeve; and a water jacket is arranged between the stator and the sleeve and is connected with the cooling channel, so that heat generated between the armature components is conveniently discharged out of the interior of the armature components through cooling liquid in the cooling channel.

Compared with the prior art, the utility model has the advantages that: the electric spindle assembly for high-speed grinding can be used for extremely high rotating speed, after oil mist gas enters a lubricating channel on a shell assembly, the oil mist gas is directly injected into a roller path of a bearing through a lubricating through hole on an outer ring of the bearing, the bearing is directly lubricated, the spreading of lubricating oil is avoided, the amount of the oil mist gas for lubricating the bearing can be accurately controlled, the consumption of the lubricating oil is reduced, the service performance and the service life of the bearing are improved, and the cost of compressed air is reduced.

Drawings

Fig. 1 is a front sectional view of a high-speed grinding electric spindle assembly according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a right side view of the electric spindle assembly for high-speed grinding according to the embodiment of the present invention.

Fig. 4 is a front sectional view of the electric spindle assembly for high-speed grinding according to the embodiment of the present invention.

The reference numbers are as follows:

1. a main shaft; 11. an extension end; 12. a back end; 2. a water jacket; 3. a housing assembly; 30. a dust cover; 31. a front small cover; 32. a front bearing cover; 33. a front large cover; 34. a sleeve; 35. a rear bushing; 36. a rear bearing seat; 37. A spring pad; 38. a hollow pin; 39. a rear cover; 4. an armature assembly; 41. a stator; 42. a rotor; 5. a lubrication mechanism; 51. a lubrication channel; 6. a bearing; 61. lubricating the through hole; 7. a rolling guide sleeve; 8. an elastic element; 9. a cooling channel; 91. a cavity; 10. and (4) air sealing the channel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Fig. 1, 2, 3 and 4 are a front sectional view B-B, a partially enlarged view a part a, a right side view and a front sectional view of an electric spindle assembly for high-speed grinding according to an embodiment of the present invention, respectively. In the embodiment of the present invention, the electric spindle assembly for high-speed grinding includes a housing assembly 3, a spindle 1 disposed in the housing assembly 3, and an armature assembly 4 for driving the spindle 1 to rotate, and the spindle is provided with an extending end 11 extending out of the housing assembly 3.

The housing assembly 3 is an important part of the electric spindle assembly for high-speed grinding, and comprises a dust cover 30, a front small cover 31, a front bearing seat 32, a front large cover 33, a sleeve 34, a rear bushing 35, a rear bearing seat 36, a spring pad 37 and a rear cover 39. The sleeve 34 is sleeved on the main shaft 1 near the extending end 11, the front big cover 33 is arranged on the end surface of the sleeve 34, the dust cover 30 is sleeved on the extending end 11 and is arranged on the end surface of the front big cover 33, the rear cover 39 is arranged on the end surface of the sleeve 34 near the rear end 12 of the main shaft 1, the front bearing seat 32 is arranged between the bearing 6 and the front big cover 33, the rear bearing seat 36 is arranged between the bearing 6 and the sleeve 34 at the rear end 12, the rear bushing 35 is arranged between the rear bearing seat 36 and the sleeve 34, the spring pad 37 is arranged between the rear bearing seat 36 and the opposite end surface of the rear cover 39, and the front small cover 31 is arranged on the end surface of the front bearing seat 32 between the dust cover 30 and the front. The rolling guide sleeves 7 are arranged between the rear bushing 35 and the rear bearing seat 36, the rear bushing 35 is provided with a plurality of counter bores on the end face opposite to the spring pad 37, elastic elements 8 are arranged in the counter bores, one ends of the elastic elements 8 extending out of the counter bores are abutted to the end face of the spring pad 37, bearings 6 supported at two ends of the main shaft 1 are arranged in the shell assembly 3, the bearings 6 are angular contact bearings and are respectively supported and arranged between the main shaft 1 and the front big cover 33 and between the rear end 12 and the sleeve 34, so that the bearings 6 are supported on the main shaft 1 at intervals, the force action point span on the main shaft 1 is increased, the rigidity of the extending end of the main shaft 1 is improved, the circular runout error of the main shaft 1 during rotation is reduced, the stability of the main shaft 1 is kept, and meanwhile, the preload of the bearings 6 is in an elastic loading mode, and the.

And be equipped with a lubrication mechanism 5 between bearing 6 and shell subassembly 3, lubrication mechanism 5 is including setting up lubrication channel 51 on shell subassembly 3 and setting up on bearing 6 outer lane and with the lubrication through-hole 61 of lubrication channel 51 intercommunication, make oil mist gas get into the lubrication channel 51 on shell subassembly 3 after, directly pour into the raceway of bearing 6 through the lubrication through-hole 61 on the bearing 6 outer lane, directly lubricate bearing 6, the lubricating oil has been avoided scattering, be convenient for simultaneously carry out accurate control to the lubricated oil mist gas volume of bearing 6, reduce the consumption of lubricating oil, improve bearing 6's performance and life-span, thereby reduce compressed air cost. The lubricating channel 51 is composed of lubricating holes arranged on the sleeve 34, the front big cover 33, the front bearing seat 32, the rear bearing seat 36 and the rear cover 39 and a central hole of the hollow pin 38 respectively, so that the oil mist gas can be conveniently conveyed and the bearing 6 can be lubricated.

The shell component 3 is provided with an air sealing mechanism which comprises an air sealing channel 10 arranged on the shell component 3; the air seal channel 10 is composed of air seal holes arranged on a rear cover 39, a sleeve 34, a front big cover 33, a front bearing seat 32 and a front small cover 31 respectively, an outlet of the air seal channel 10 is radially arranged on the front small cover 31 along the main shaft 1 and used for sealing the electric main shaft assembly, impurities are prevented from entering between the shell assembly 3 and the main shaft 1, the influence of the impurities on the main shaft 1 in the shell assembly 3 is reduced, and the service life of the electric main shaft assembly is prolonged.

The shell component 3 is also provided with a cooling channel 9, and the cooling channel 9 is respectively composed of cooling holes arranged on the rear cover 39, the sleeve 34 and the front big cover 33 and a cavity 91 formed by a groove on the outer circumference of the front bearing seat 32 and the front big cover 33, so that the heat dissipation of the electric spindle component is facilitated. The armature assembly 4 includes a rotor 42 wound on the main shaft 1 and a stator 41 provided on the inner circumference of the sleeve; the water jacket 2 is arranged between the stator 41 and the sleeve 34, and the water jacket 2 is connected with the cooling channel 9, so that heat generated between the armature assemblies 4 can be conveniently discharged out of the interior of the electric spindle assembly through the cooling liquid in the cooling channel 9.

This electric main shaft subassembly for high-speed grinding gets into behind the lubricated passageway on the shell subassembly at oil mist gas, directly pour into the raceway of bearing into by the lubricated through-hole on the bearing inner race, directly lubricate the bearing, lubricating oil has been avoided and has been spread, be convenient for simultaneously carry out accurate control to the lubricated oil mist gas volume of bearing, reduce the consumption of lubricating oil, improve the performance and the life-span of bearing, reduce the compressed air cost, adopt the atmoseal structure, prevent to get into impurity between shell subassembly and the main shaft, reduce the influence of impurity to the main shaft in the shell subassembly, prolong electric main shaft subassembly's life.

Some features of the above embodiments may be interchanged and omitted, and the scope of the present invention should not be limited thereto, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are intended to be encompassed by the present invention.

Claims

1. An electric spindle assembly for high-speed grinding comprises a shell assembly (3), a spindle (1) arranged in the shell assembly (3) and an armature assembly (4) for driving the spindle (1) to rotate; the main shaft (1) is provided with an extending end (11) extending out of the shell component (3); the method is characterized in that:

bearings (6) supported at both ends of the main shaft (1) are arranged in the shell component (3);

wherein a lubricating mechanism (5) is arranged between the bearing (6) and the shell component (3); the lubricating mechanism (5) comprises a lubricating channel (51) arranged on the shell component (3) and a lubricating through hole (61) arranged on the outer ring of the bearing (6) and communicated with the lubricating channel (51).

2. The electric spindle assembly of claim 1, wherein: the shell assembly (3) comprises a sleeve (34) sleeved on the main shaft (1) and close to the extending end (11), a front big cover (33) arranged on the end face of the sleeve (34), a dustproof cover (30) sleeved on the extending end (11) and arranged on the end face of the front big cover (33), and a rear cover (39) close to the rear end (12) of the main shaft (1) and arranged on the end face of the sleeve (34).

3. The electric spindle assembly of claim 2, wherein: the lubricating channel (51) comprises a lubricating hole which is axially arranged on the wall of the sleeve (34) and a lubricating hole which is axially and radially communicated and arranged on the front big cover (33).

4. Electric spindle assembly according to claim 2 or 3, characterized in that: the bearing (6) adopts an angular contact bearing and is respectively supported and arranged between the main shaft (1) and the front big cover (33) and between the rear end (12) and the sleeve (34).

5. The electric spindle assembly of claim 4, wherein: the housing assembly (3) further comprises a front bearing seat (32) disposed between the bearing (6) and the front large cover (33) and a rear bearing seat (36) disposed between the bearing (6) and the sleeve (34) of the rear end (12), the lubrication channel (51) further comprising lubrication holes radially disposed on the front bearing seat (32) and the rear bearing seat (36).

6. The electric spindle assembly of claim 5, wherein: the shell assembly (3) further comprises a rear bushing (35) disposed between the rear bearing seat (36) and the sleeve (34) and a spring pad (37) disposed between the rear bearing seat (36) and an opposite end face of the rear cover (39); a plurality of rolling guide sleeves (7) are arranged between the rear bushing (35) and the rear bearing seat (36); a plurality of counter bores are formed in the end face, opposite to the spring pad (37), of the rear bushing (35), and elastic elements (8) are arranged in the counter bores; the end of the elastic element (8) extending out of the counter bore is resisted on the end face of the spring pad (37); lubricating holes are axially formed in the corresponding positions of the rear cover (39) and the rear bearing seat (36), and a hollow pin (38) which penetrates through the spring pad (37) and is connected with the lubricating holes is arranged between the rear cover (39) and the rear bearing seat (36); the radial lubricating hole of the rear bearing seat (36) is communicated with the axial lubricating hole.

7. The electric spindle assembly of claim 6, wherein: the shell assembly (3) is provided with an air sealing mechanism, and the air sealing mechanism comprises an air sealing channel (10) arranged on the shell assembly (3); the outlet of the air seal channel (10) is arranged on the shell component close to the extending end (11) of the main shaft (1), and the outlet of the air seal channel (10) is arranged along the radial direction of the main shaft (1).

8. The electric spindle assembly of claim 7, wherein: the shell assembly (3) further comprises a front small cover (31) arranged between the dust cover (30) and the front bearing seat (32); the front small cover (31) is arranged on the end face of the front bearing seat (32), the air sealing channel (10) comprises axial air sealing holes formed in the rear cover (39) and the sleeve (34) and air sealing holes formed in the front large cover (33), the front bearing seat (32) and the front small cover (31) and communicated in the axial direction and the radial direction, and an outlet of the air sealing channel (10) is arranged on the front small cover (31) in the radial direction of the main shaft (1).

9. The electric spindle assembly of claim 8, wherein: the electric spindle assembly is provided with a cooling channel (9), wherein the cooling channel (9) comprises cooling holes formed in the rear cover (39) and the sleeve (34), cooling holes formed in the front big cover (33) and communicated in the axial direction and the radial direction, and a cavity (91) formed by a groove in the outer circumference of the front bearing seat (32) and the front big cover (33) in a surrounding mode.

10. The electric spindle assembly of claim 9, wherein: the armature assembly (4) comprises a rotor (42) wound on the main shaft (1) and a stator (41) arranged on the inner circumference of the sleeve (34); a water jacket (2) is arranged between the stator (41) and the sleeve (34), and the water jacket (2) is connected with the cooling channel (9).