Damping compressor main shaft

Abstract

The utility model discloses a damping compressor main shaft, and belongs to the technical field of compressor main shafts. A damping compressor spindle comprises a spindle body and an eccentric pin, and an eccentric hole is formed in the eccentric position of the end of the spindle body and used for detachably installing the eccentric pin. The eccentric pin is used for being detachably connected with the eccentric balance block, the eccentric balance block comprises a lining and a balance part, and the inner wall of the lining is detachably connected with the eccentric pin and used for enabling the eccentric balance block to rotate along with rotation of the main shaft body; the balance part abuts against the end, where the eccentric hole is located, of the main shaft body and is used for guaranteeing dynamic balance of the main shaft body. An annular groove is formed in the area, where the balance part is located, of the main shaft body, an annular ring is detachably installed at the annular groove, and the annular ring is clamped between the annular groove and the eccentric balance block and used for bearing loads generated between the main shaft body and the eccentric balance block.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor main shafts, and more specifically relates to a vibration-damping compressor main shaft. Background Art

[0002] As an important component of new energy vehicles, electric compressors play a very important role. As the core component of the air conditioning system of new energy vehicles, electric compressors play an irreplaceable role. The performance, vibration and noise, reliability, sealing, etc. of electric compressors are all important factors affecting their operation.

[0003] The main shaft used in most electric compressors now has a gap of 0.4mm between the eccentric pin end and the counterweight. When the compressor is working normally, the counterweight will experience axial runout, which will cause loud noise and vibration during the operation of the compressor and reduce the working efficiency of the compressor. Taking the compressor main shaft assembly equipment (CN202120863677.3) disclosed in the Chinese invention patent document as an example, the invention prevents the counterweight from axial runout by sleeve-mounting the counterweight on the main shaft and fastening the counterweight to the main shaft with screws. However, this solution requires threaded holes to be drilled in the counterweight and the main shaft, which is more complicated to process. At the same time, the counterweight after the threaded hole is drilled will change its overall mass distribution, which will affect its eccentric effect, thereby affecting the stability of the compressor operation.

[0004] Therefore, we need a compressor main shaft with simple structure, convenient processing, and less noise and vibration when working in conjunction with the counterweight. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a shock-absorbing compressor main shaft, which has a simple structure and is easy to process. By arranging an elastic ring close to the main shaft body and the counterweight block, the purpose of reducing noise and vibration when the main shaft body and the counterweight block are matched can be achieved.

[0006] The utility model discloses a vibration-damping compressor main shaft, which comprises a main shaft body and an eccentric pin. An eccentric hole is provided at an eccentric position on the end of the main shaft body for detachably installing the eccentric pin.

[0007] The eccentric pin is used to be detachably connected to the eccentric balancing block. The eccentric balancing block includes a bushing and a balancing part. The inner wall of the bushing is detachably connected to the eccentric pin, and is used to make the eccentric balancing block rotate with the rotation of the main shaft body; the balancing part abuts against the end of the main shaft body on the side where the eccentric hole is located, and the balancing part is used to ensure the dynamic balance of the main shaft body when the compressor is running.

[0008] The main shaft body is provided with an annular groove in the area where the balancing part is located, and an annular ring is detachably installed at the annular groove to prevent the annular ring from moving on the main shaft body; the annular ring is tightly attached to the annular groove and the eccentric balancing block, and is used to bear the load generated between the main shaft body and the eccentric balancing block.

[0009] As a further improvement of the utility model, the main shaft body includes a main shaft rod and a bearing rod. The bearing rod is located at the axial extension of one end of the main shaft rod away from the eccentric hole and is fixedly connected to the main shaft rod to cooperate with the bearing to support the stable rotation of the main shaft body.

[0010] As a further improvement of the utility model, a plurality of mounting grooves are opened in the middle of the main shaft rod for detachable connection with the supporting assembly of the compressor.

[0011] As a further improvement of the utility model, a limiting groove is provided at the step where the main shaft rod and the bearing rod are connected, which is used for detachable connection with the components of the compressor and cooperates with the installation groove to limit the axial position of the main shaft body.

[0012] As a further improvement of the utility model, the circular radius of the cross section of the annular ring is not less than the depth of the annular groove, which is used to maintain the stability of the eccentric balance block on the main shaft body; at the same time, the annular ring can maintain the gap between the eccentric balance block and the main shaft body to reduce wear.

[0013] As a further improvement of the present invention, the annular ring is made of elastic material and can be squeezed and deformed by the balancing part in the annular groove to form a certain buffer layer, thereby reducing the direct impact of the eccentric balancing block on the main shaft body after being affected by vibration, and avoiding axial vibration of the eccentric balancing block, which causes noise and vibration to the compressor.

[0014] As a further improvement of the utility model, a center hole is opened at the end of the bearing rod for positioning the main shaft body inside the compressor.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: a shock-absorbing compressor main shaft of the utility model reduces the axial runout of the counterweight by arranging an annular ring close to the main shaft body and the counterweight, thereby achieving the purpose of reducing noise and vibration when the main shaft body and the counterweight cooperate, thereby achieving the effect of improving product reliability and product service life; the main shaft body position is limited by the limit grooves arranged at the installation grooves of the main shaft rod and the bearing rod steps, so that the main shaft body will not be offset or vibrated, thereby achieving the shock-absorbing effect and improving the stability of the compressor operation; by making the cross-sectional circular radius of the elastic annular ring not less than the depth of the annular groove, a certain buffer layer is formed between the main shaft body and the counterweight, reducing the direct impact of the counterweight on the main shaft body and avoiding axial displacement, thereby achieving the effect of reducing the noise and vibration occurring during the operation of the compressor and improving customer experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of a half-section structure of the utility model;

[0018] Figure 3 It is an enlarged schematic diagram of the structure at A of the utility model;

[0019] Figure 4 It is a schematic diagram of the annular ring structure of the utility model.

[0020] Description of the numbers in the figure:

[0021] 1 spindle body, 11 spindle rod, 111 mounting groove, 12 bearing rod, 121 limiting groove, 122 center hole, 13 eccentric hole, 14 annular groove, 2 eccentric pin, 3 eccentric balance block, 31 bushing, 32 balance part, 4 annular ring. DETAILED DESCRIPTION

[0022] Specific embodiment 1: Please refer to Figures 1 - 4 A vibration-damping compressor main shaft comprises a main shaft body 1 and an eccentric pin 2. An eccentric hole 13 is provided at an eccentric position on the end of the main shaft body 1 for detachably installing the eccentric pin 2.

[0023] The eccentric pin 2 is used to be detachably connected to the eccentric balancing block 3. The eccentric balancing block 3 includes a bushing 31 and a balancing portion 32. The inner wall of the bushing 31 is detachably connected to the eccentric pin 2, and is used to make the eccentric balancing block 3 rotate with the rotation of the main shaft body 1; the balancing portion 32 abuts against the end of the main shaft body 1 on the side where the eccentric hole 13 is located. The balancing portion 32 is used to ensure the dynamic balance of the main shaft body 1 when the compressor is running, thereby achieving stable operation of the compressor.

[0024] The spindle body 1 is provided with an annular groove 14 in the area where the balancing part 32 is located, and an annular ring 4 is detachably installed at the annular groove 14. The annular groove 14 limits the position of the annular ring 4 to prevent the annular ring 4 from moving on the spindle body 1; the annular ring 4 is tightly attached to the annular groove 14 and the eccentric balancing block 3, and is used to bear the load generated between the spindle body 1 and the eccentric balancing block 3. At the same time, the annular ring 4 is clamped by the annular groove 14 and the eccentric balancing block 3 to reduce the axial runout of the eccentric balancing block 3. By clamping the annular ring 4, the tiny gap between the spindle body 1 and the eccentric balancing block 3 is converted into damping to prevent the axial movement of the eccentric balancing block 3, thereby achieving the effect of shock absorption and noise reduction.

[0025] Specifically, Figure 2 The spindle body 1 shown includes a spindle rod 11 and a bearing rod 12. The bearing rod 12 is located at an axial extension of one end of the spindle rod 11 away from the eccentric hole 13, is fixedly connected to the spindle rod 11, and is used to cooperate with the bearing to support the spindle body 1 for stable rotation.

[0026] Specifically, a plurality of mounting grooves 111 are formed in the middle of the main shaft rod 11 for detachably connecting with the support assembly of the compressor in a clamping manner, making the movement of the main shaft body 1 more stable.

[0027] Specifically, a central hole 122 is formed at the end of the bearing rod 12 for positioning the main shaft body 1 inside the compressor, thereby preventing the axis position of the main shaft body 1 from deviating during rotation and affecting the normal use of the compressor.

[0028] Specifically, as Figure 3 shown, a limiting groove 121 is provided at the stepped portion where the main shaft rod 11 and the bearing rod 12 are connected for detachably connecting with the components of the compressor and simultaneously cooperating with the mounting groove 111 to axially limit the main shaft body 1, thereby further limiting the position of the main shaft body 1 and preventing the main shaft body 1 from swinging due to the gap in the connection area with the compressor components, improving the stability of the operation of the main shaft body 1.

[0029] Specifically, as Figure 4 shown, the cross-sectional circular radius of the annular ring 4 is not less than the depth of the annular groove 14 for maintaining the clamping of the annular groove 14 and the eccentric balance weight 3 on the annular ring 4, thereby ensuring the stability of the eccentric balance weight 3 on the main shaft body 1; at the same time, the presence of the annular ring 4 can maintain the gap between the eccentric balance weight 3 and the main shaft body 1, reducing the wear caused by the direct contact of the two workpieces.

[0030] Specifically, the annular ring 4 is made of an elastic material and can be deformed by the extrusion of the balancing portion 32 in the annular groove 14 to form a certain buffer layer, reducing the direct impact of the eccentric balance weight 3 on the main shaft body 1 after being affected by vibration and preventing the eccentric balance weight 3 from axially jumping, thereby causing noise and vibration to the compressor.

[0031] Specifically, the annular ring 4 can be an O-ring with a cross-sectional circular radius of 3 mm, and the matching annular groove 14 can be a circular annular groove with a depth of 1 mm. The top surface of the annular groove 14 is 4 mm away from the end surface of the main shaft rod 11 close to the eccentric pin 2, and the bottom surface of the annular groove 14 is 5.5 mm away from the end surface of the main shaft rod 11 close to the eccentric pin 2.

[0032] During use, after the main shaft body 1 and the eccentric balancing block 3 are assembled, the annular groove 14 and the eccentric balancing block 3 clamp the annular ring 4, so that the tiny gap between the main shaft body 1 and the eccentric balancing block 3 is converted into damping to prevent the axial movement of the eccentric balancing block 3. At the same time, the elastic annular ring 4 absorbs and buffers the axial force caused by vibration, thereby avoiding the axial runout of the eccentric balancing block 3, which causes large vibration and noise in the compressor and affects the normal use experience; at the same time, the presence of the annular ring 4 can also maintain the gap between the eccentric balancing block 3 and the main shaft body 1, reduce the wear of the two workpieces in direct contact, and increase the service life of the compressor; at the same time, since the main shaft body 1 is jointly positioned by the mounting groove 111, the limit groove 121 and the center hole 122, the rotation of the main shaft body 1 during the working process is more stable, and will not be offset after being loaded by the eccentric balancing block 3, thereby improving the stability of the compressor operation.

[0033] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A vibration-damped compressor main shaft, characterized in that: It comprises a main shaft body (1) and an eccentric pin (2); an eccentric hole (13) is provided at an eccentric position on the end of the main shaft body (1) for detachably installing the eccentric pin (2); The eccentric pin (2) is used to be detachably connected to the eccentric balancing block (3); the eccentric balancing block (3) comprises a bushing (31) and a balancing portion (32); the inner wall of the bushing (31) is detachably connected to the eccentric pin (2); the balancing portion (32) abuts against the end of the main shaft body (1) on the side where the eccentric hole (13) is located, and is used to ensure the dynamic balance of the main shaft body (1) when the compressor is running; The spindle body (1) is provided with an annular groove (14) in the area where the balancing portion (32) is located, and an annular ring (4) is detachably mounted on the annular groove (14) to prevent the annular ring (4) from moving on the spindle body (1); the annular ring (4) is tightly attached to the annular groove (14) and the eccentric balancing block (3).

2. A vibration-damped compressor main shaft according to claim 1, characterized in that: The main spindle body (1) comprises a main spindle rod (11) and a bearing rod (12); the bearing rod (12) is located at an axial extension of one end of the main spindle rod (11) away from the eccentric hole (13), is fixedly connected to the main spindle rod (11), and is used to cooperate with the bearing to support the main spindle body (1) for stable rotation.

3. A vibration-damped compressor main shaft according to claim 2, characterized in that: A plurality of mounting grooves (111) are formed in the middle of the main shaft rod (11) for detachably connecting with a supporting assembly of the compressor.

4. A vibration-damped compressor main shaft according to claim 2, characterized in that: A limiting groove (121) is provided at the step where the main shaft rod (11) and the bearing rod (12) are connected, and is used for detachably connecting with a compressor component to limit the axial position of the main shaft body (1).

5. A vibration-damped compressor main shaft according to claim 1, characterized in that: The circular radius of the cross section of the annular ring (4) is not less than the depth of the annular groove (14), and is used to maintain the stability of the eccentric balance weight (3) on the main shaft body (1).

6. A vibration-damped compressor main shaft according to claim 1, characterized in that: The annular ring (4) is made of an elastic material and can be squeezed and deformed by the balancing portion (32) in the annular groove (14), so as to mitigate the direct impact of the eccentric balancing block (3) on the main shaft body (1).

7. A vibration-damped compressor main shaft according to claim 2, characterized in that: The end of the bearing rod (12) is provided with a central hole (122) for positioning the main shaft body (1) inside the compressor.

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