CN218844587U

CN218844587U - Compressor and vehicle

Info

Publication number: CN218844587U
Application number: CN202223377293.4U
Authority: CN
Inventors: 郑坚标
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-04-11
Anticipated expiration: 2032-12-15

Abstract

The utility model provides a compressor, vehicle, compressor wherein, construct the mounting hole including on the support, the bent axle has the installation department, and the installation department is provided with a plurality of balls in the mounting hole between the internal surface of installation department and mounting hole, forms between the internal surface of installation department and mounting hole and allows each ball circumference rolling raceway, and along the axial of mounting hole, the raceway still forms spacingly to each ball. According to the utility model discloses, form rolling friction between the surface of each ball and bent axle installation department and the internal surface of support mounting hole, on the basis of keeping the original effect of bearing, avoided interference fit to cause bearing inner race and outer lane to warp and influence bearing installation play. The sizes of parts are reduced, the installation clearance is only influenced by three variables of the diameter of the installation hole, the diameter of the ball and the diameter of the crankshaft, and the installation clearance is easier to control within a reasonable range, so that the operation reliability of the compressor is improved, and the operation noise of the compressor is reduced.

Description

Compressor and vehicle

Technical Field

The utility model belongs to the technical field of the vehicle, concretely relates to compressor, vehicle.

Background

The scroll compressor is widely applied to the field of vehicles due to stable operation, and in order to improve the installation stability of a shaft system, three rolling bearings are generally installed on a crankshaft to fixedly install the shaft system. The installation of antifriction bearing is divided into interference fit and clearance fit installation according to the installation fit dimension of interior outer lane, to the main bearing on the automobile-used scroll compressor support, generally adopts the structural style that interior outer lane all was interference fit installation. The inner and outer ring raceways of the bearing are inevitably deformed by interference fit, the assembly clearance of the bearing is difficult to control within a reasonable range, and finally, the operation reliability of the compressor is reduced and the operation noise is increased. Wherein, the bearing play receives seven variables influences such as support mounting aperture, bearing inner race external diameter, bearing inner race internal diameter, ball diameter, bearing inner race internal diameter, bearing inner race external diameter and crankshaft installation department diameter, if can reduce the variable that influences the bearing play, will improve the problem that the bearing play is difficult to control at reasonable within range for the operation of compressor is more reliable, and the running noise is littleer.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a compressor can solve when the main bearing on the current automobile-used scroll compressor support adopts interference fit installation, and the outer lane raceway can take place to warp in the bearing for the assembly play of bearing is difficult to control at reasonable within range, finally causes compressor operational reliability to reduce, the problem of noise of operation grow.

In order to solve the above problem, the present invention provides a compressor, including: the crankshaft is provided with an installation part, the installation part is located in the installation hole, a plurality of balls are arranged between the installation part and the inner surface of the installation hole, raceways allowing the balls to roll in the circumferential direction are formed between the installation part and the inner surface of the installation hole and are axially arranged in the installation hole, and the raceways are limited to the balls.

In some embodiments, the mounting portion is configured with a recess forming a mounting channel with an inner surface of the mounting bore, the mounting channel opening into the raceway, the ball being mounted in the raceway through the mounting channel.

In some embodiments, the mounting channel has a first inclined surface on the mounting portion, the crankshaft has a central axis, the central axis is in a reference plane, the reference plane is perpendicular to the first inclined surface, a projection of the first inclined surface in the reference plane is a first straight line, and an included angle a1 is formed between the first straight line and the central axis, and the included angle a1 is more than 5 degrees and less than or equal to a1 and less than or equal to 20 degrees.

In some embodiments, the mounting channel further has a second inclined surface on the inner surface of the mounting hole, a projection of the second inclined surface in the reference plane is a second straight line, and the second straight line forms an included angle a2 with the central axis, and a2 < a1.

In some embodiments, the raceway has a first concave arc surface on the outer surface of the mounting portion and a second concave arc surface on the inner surface of the mounting hole, and the first concave arc surface and the second concave arc surface are both provided with wear resistant layers.

In some embodiments, the wear layer has a thickness of 8 to 50 μm.

In some embodiments, the maximum distance between the outer surface of the wear layer on the first concave arc surface and the outer surface of the wear layer on the second concave arc surface is L, the diameter of the ball is R, and the distance between the outer surface of the wear layer on the first concave arc surface and the outer surface of the wear layer on the second concave arc surface is L and L-R is less than or equal to 5 μm and less than or equal to 20 μm.

In some embodiments, the compressor further includes a retainer, the retainer is disposed on an outer side of the mounting portion, and each of the balls is rotatably retained in the retainer at intervals.

In some embodiments, each of the balls is evenly distributed within the cage.

The utility model also provides a vehicle, including foretell compressor.

The utility model provides a compressor, vehicle are got rid of through the original inner circle of bearing and outer lane, only remain a plurality of balls, then with each ball setting between the internal surface of installation department and mounting hole, then the surface of each ball can contact with the surface of installation department and the internal surface of mounting hole. When the crankshaft rotates, under the action of friction force, each ball can rotate, and simultaneously each ball can also revolve under the drive of the crankshaft, namely rolling friction is formed between each ball and the outer surface of the mounting part and the inner surface of the mounting hole, so that on the basis of keeping the original action of the bearing, the phenomenon that the inner ring and the outer ring of the bearing are deformed to influence the mounting clearance of the bearing due to interference fit is avoided. The sizes of parts are also reduced, so that the installation clearance is only influenced by three variables of the diameter of the installation hole, the diameter of the ball and the diameter of the crankshaft, and the installation clearance is easier to control within a reasonable range, thereby being beneficial to improving the operation reliability of the compressor and reducing the operation noise of the compressor.

Drawings

Fig. 1 is a schematic structural diagram of a compressor according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a compressor according to an embodiment of the present invention, in which a crankshaft is mounted on a bracket;

fig. 3 is an enlarged schematic view of a portion a of the compressor according to the embodiment of the present invention in fig. 2;

FIG. 4 is a schematic view of a compressor according to the prior art;

fig. 5 is a schematic view showing a structure in which a crankshaft of a compressor according to the related art is mounted on a bracket.

The reference numbers are given as:

1. a crankshaft; 2. a support; 3. mounting holes; 4. a ball bearing; 5. a raceway; 6. installing a channel; 7. a holder; 8. a wear layer; 9. a main bearing; 10. and a secondary bearing.

Detailed Description

Referring to fig. 1 to 5 in combination, according to an embodiment of the present invention, there is provided a compressor including: the crankshaft 1 and the support 2 are provided with a mounting hole 3, the crankshaft 1 is provided with a mounting part, the mounting part is positioned in the mounting hole 3, a plurality of balls 4 are arranged between the mounting part and the inner surface of the mounting hole 3, a roller path 5 allowing each ball 4 to roll in the circumferential direction is formed between the mounting part and the inner surface of the mounting hole 3, and the roller path 5 also limits each ball 4 along the axial direction of the mounting hole 3. In this technical scheme, through getting rid of the original inner circle of bearing and outer lane, only remain a plurality of balls 4, then set up each ball 4 between the internal surface of installation department and mounting hole 3, then the surface of each ball 4 can contact with the surface of installation department and the internal surface of mounting hole 3. When the bent axle 1 rotates, under the effect of frictional force, each ball 4 can rotate, simultaneously each ball 4 still can carry out the revolution under bent axle 1's drive, form rolling friction between the surface that also is each ball 4 and installation department and the internal surface of mounting hole 3, thereby on the basis that keeps the original effect of bearing, avoided interference fit to cause bearing inner race and outer lane to warp and influence bearing installation play, also reduced the spare part size, make the installation play only receive the mounting hole 3 diameter, the influence of the three variable of ball 4 diameter and bent axle 1 diameter, the installation play is controlled in reasonable within range more easily, thereby be favorable to promoting compressor operational reliability, reduce compressor noise. Further, the size of a shaft system installation part is reduced by removing the inner ring and the outer ring of the bearing, so that the structure of the whole machine is more compact.

As a specific embodiment, the mounting portion is configured with a recess, a mounting channel 6 is formed between the recess and the inner surface of the mounting hole 3, the mounting channel 6 is opened to the raceway 5, and the ball 4 is mounted in the raceway 5 through the mounting channel 6. The recess can increase the installation space, so that the installation of the ball 4 is more convenient.

Referring to fig. 3 in combination, the mounting channel 6 has a first inclined surface on the mounting portion, the crankshaft 1 has a central axis, the central axis is in the reference plane, the reference plane is perpendicular to the first inclined surface, a projection of the first inclined surface in the reference plane is a first straight line, and an included angle a1 is formed between the first straight line and the central axis. The first inclined plane is also a plane of the recess on the mounting portion, the greater the inclination of the first inclined plane, that is, the greater the included angle a1, the more the recess is recessed, and thus the structural strength of the crankshaft 1 is affected. In order to achieve both the structural strength of the crankshaft 1 and the mounting of the balls 4, it is preferable that a1 is 5 DEG or more and 20 DEG or less.

Specifically, the mounting channel 6 further has a second inclined surface on the inner surface of the mounting hole 3, and a projection of the second inclined surface in the reference plane is a second straight line, and an included angle a2 is formed between the second straight line and the central axis. The second inclined surface on the inner surface of the mounting hole 3 plays a limiting role on the ball 4, and the ball 4 can be prevented from falling out of the mounting hole 3 in a working state. Meanwhile, a2 < a1 is required to facilitate the installation of the ball 4, so that the ball 4 is limited, and meanwhile, the installation channel 6 is ensured to have enough space so that the ball 4 can be installed in the raceway 5 through the installation channel 6.

Referring to fig. 3 in combination, the raceway 5 has a first concave arc surface on the outer surface of the mounting portion and a second concave arc surface on the inner surface of the mounting hole 3, and the first concave arc surface and the second concave arc surface are both provided with wear-resistant layers 8. The wear-resistant layer 8 can be carburized and nitrided to improve hardness and wear resistance, and can also be subjected to surface treatment such as nickel plating to improve wear resistance. The wear-resistant layer 8 is used for ensuring the wear resistance of the roller path 5 and ensuring the reliable use of the balls 4 under high load and high-speed operation.

In particular, because of the limited space within the raceway 5, the thickness of the wear layer 8 should be limited or otherwise interfere with the installation of the balls 4. Preferably, the wear resistant layer 8 has a thickness of 8-50 μm.

In the embodiment, the maximum distance between the outer surface of the wear-resistant layer 8 on the first concave cambered surface and the outer surface of the wear-resistant layer 8 on the second concave cambered surface is L, the diameter of the ball 4 is R, and L-R is more than or equal to 5 μm and less than or equal to 20 μm. The balls 4 need to be installed in the raceway 5 in a clearance fit manner, so that when the crankshaft 1 rotates, each ball 4 can rotate and roll in the raceway 5, thereby ensuring that the friction between the crankshaft 1 and each ball 4 and between each ball 4 and the inner surface of the installation hole 3 is smaller due to sliding friction. Meanwhile, the clearance during clearance fit cannot be too large, the installation precision needs to be ensured, and preferably, the L-R is more than or equal to 5 mu m and less than or equal to 20 mu m.

Referring to fig. 3, the compressor further includes a retainer 7, the retainer 7 is disposed on the outer side of the mounting portion, and the balls 4 are rotatably retained in the retainer 7 at intervals. The cage 7 spaces the balls 4 apart from each other without affecting the rotation and revolution of the balls 4 so that the balls 4 are not jammed together during the rotation of the crankshaft 1. At the same time, the cage 7 prevents the balls 4 from falling out of the mounting holes 3 through the mounting passages 6.

In this embodiment, the balls 4 are uniformly distributed in the retainer 7, so that the mounting portion of the crankshaft 1, the balls 4, and the bracket 2 are uniformly stressed during operation.

Further, in addition to the main bearing 9, other secondary bearings 10 may also adopt the integrated structure described above. Of course, whether the compressor is a scroll compressor, a roller compressor, or other compressors, the above-described integrated structure can also be adopted when the compressor is horizontal or vertical. Further, a scroll compressor is particularly suitable.

According to the utility model discloses an embodiment still provides a vehicle, includes foretell compressor.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a compressor, its characterized in that, includes bent axle (1), support (2), be constructed mounting hole (3) on support (2), bent axle (1) has the installation department, the installation department is in mounting hole (3), the installation department with be provided with a plurality of balls (4) between the internal surface of mounting hole (3), the installation department with form between the internal surface of mounting hole (3) and allow each ball (4) rolling raceway (5) of circumference, and follow the axial of mounting hole (3), raceway (5) are still to each ball (4) form spacingly.

2. Compressor according to claim 1, characterized in that the mounting portion is configured with a recess, which forms a mounting channel (6) with the inner surface of the mounting hole (3), which mounting channel (6) opens into the raceway (5), and the balls (4) are mounted in the raceway (5) through the mounting channel (6).

3. The compressor of claim 2, wherein the mounting channel (6) has a first inclined surface on the mounting portion, the crankshaft (1) has a central axis, the central axis is in a reference plane, and the reference plane is perpendicular to the first inclined surface, a projection of the first inclined surface in the reference plane is a first straight line, and an included angle a1,5 ° ≦ a1 ≦ 20 ° is formed between the first straight line and the central axis.

4. The compressor of claim 3, wherein the mounting channel (6) further has a second inclined surface on the inner surface of the mounting hole (3), the projection of the second inclined surface in the reference plane is a second straight line, and the second straight line forms an included angle a2 with the central axis, wherein a2 < a1.

5. Compressor according to claim 1, characterized in that the raceway (5) has a first concave arc surface on the outer surface of the mounting portion and a second concave arc surface on the inner surface of the mounting hole (3), the first and second concave arc surfaces each being provided with a wear layer (8).

6. Compressor according to claim 5, characterized in that the thickness of the wear resistant layer (8) is 8-50 μm.

7. A compressor according to claim 5, characterized in that the maximum distance between the outer surface of the wear layer (8) on the first concave arc and the outer surface of the wear layer (8) on the second concave arc is L, the diameter of the ball (4) is R,5 μm L-R20 μm.

8. The compressor of any one of claims 1 to 7, further comprising a retainer (7), wherein the retainer (7) is sleeved outside the mounting portion, and each ball (4) is respectively and rotatably limited in the retainer (7) at intervals.

9. Compressor according to claim 8, characterized in that each ball (4) is uniformly distributed within the cage (7).

10. A vehicle characterized by comprising the compressor of any one of claims 1 to 9.