A machining positioning fixture for inner ring of deep groove ball bearing

Abstract

The utility model discloses a kind of processing positioning fixture of deep groove ball bearing inner ring, it is related to bearing processing field, and its technical scheme main point is: including positioning table, the top of the positioning table is fixedly connected with pre-positioning ring, deep groove ball bearing inner ring is sleeved on it, the bottom of the positioning table is equipped with motor for driving its top main bevel gear rotation, a plurality of sub bevel gears that are circumferentially distributed around main bevel gear are meshingly connected on the main bevel gear, the number of sub bevel gears is more than three, each sub bevel gear is connected with a pusher assembly, an arc clamping plate is connected on the pushing part of the pusher assembly, effect is the number of sub bevel gears and corresponding arc clamping plate in the utility model is more than three, can form multiple clamping stress points that are evenly distributed in circumferential direction, fully adapt to the stress characteristics of deep groove ball bearing inner ring thin-walled annular structure, avoid that workpiece produces trace elastic deformation or positioning eccentricity.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing, and more specifically, it relates to a machining positioning fixture for the inner ring of a deep groove ball bearing. Background Technology

[0002] As a core component in the field of mechanical transmission, the machining accuracy of the inner ring, such as the roundness of the groove, coaxiality, and parallelism of the end face, directly determines the smoothness of rotation, load-bearing capacity, and service life of the bearing. It is widely used in machine tools, automobiles, motors, and other equipment with stringent requirements for transmission accuracy. Positioning fixtures are key tooling in the machining process of the inner ring of deep groove ball bearings.

[0003] Currently, there are many areas for improvement in the positioning fixtures for machining the inner ring of deep groove ball bearings on the market: some fixtures do not have a pre-positioning structure, making it difficult to quickly and accurately pre-position the inner ring of the deep groove ball bearing, which directly affects the machining cycle time; in terms of clamping, most fixtures still use a three-jaw chuck adapted to general workpieces or a design with fewer than three clamping units, which does not fully consider the force characteristics of the thin-walled annular structure of the inner ring of the deep groove ball bearing. There are fewer force points evenly distributed in the circumferential direction, which can easily lead to slight elastic deformation or positioning eccentricity of the inner ring of the deep groove ball bearing. Especially in the high-precision machining of the inner ring of the deep groove ball bearing, it is difficult to meet the stringent dimensional and geometric tolerance requirements.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes a machining positioning fixture for the inner ring of a deep groove ball bearing. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a machining and positioning fixture for the inner ring of a deep groove ball bearing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a machining and positioning fixture for the inner ring of a deep groove ball bearing, comprising a positioning platform, a pre-positioning ring fixedly connected to the top of the positioning platform, the inner ring of the deep groove ball bearing fitting on the platform, a motor installed at the bottom of the positioning platform to drive the rotation of the main bevel gear at its top, multiple circumferentially distributed sub-bevel gears meshing with the main bevel gear, the number of sub-bevel gears being greater than three, each sub-bevel gear being connected to a pushing component, an arc-shaped clamping plate connected to the pushing part of the pushing component, the pre-positioning ring having a through groove for the arc-shaped clamping plate to pass through, the arc-shaped clamping plate passing through the through groove to fix the inner ring of the deep groove ball bearing.

[0007] Preferably, the pushing assembly includes a pushing rod fixed to the surface of the bevel gear away from the main bevel gear. A support bearing is sleeved on the outer wall of the pushing rod near the bevel gear, and the pushing rod is fixed to the inner ring of the support bearing. The support bearing is fixed to the top surface of the positioning table through a bearing seat. A thread is formed on the outer wall of the pushing rod away from the bevel gear, and a threaded sleeve is threaded through the thread. A guide rail A for sliding slider A is fixedly connected to the top surface of the positioning table and the parallel part of the pushing rod. The surface of slider A is fixed to the threaded sleeve through a connecting plate, and the connecting plate is connected to the arc-shaped clamping plate.

[0008] Preferably, the connecting plates are all connected to the arc-shaped clamping plate via elastic components.

[0009] Preferably, the elastic component includes a base block fixed to the surface of the connecting plate. The top two sides of the base block are connected to a connecting shell facing the through slot opening via vertical rods. An inner plate is slidably connected inside the connecting shell, and a spring is installed between the inner plate and the inner surface of the connecting shell. The other side of the inner plate connected to the spring is connected to an arc-shaped clamping plate via a connecting rod. Preferably, the upper and lower sides of the inner side of the connecting shell are fixedly connected with guide rails B for sliding slider B, and the inner plate is fixed between the sliders B.

[0010] Preferably, the bottom of the positioning platform is equipped with a mounting bracket for mounting the motor.

[0011] Preferably, the side end of the connecting shell is detachably connected to a stop block that abuts the arc-shaped clamping plate against the connecting shell to limit the maximum compression of its spring when the plate moves toward the connecting shell.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model provides a reliable pre-positioning reference for the inner ring directly through the structure of the pre-positioning ring, thereby solving the problem in the background technology that "some fixtures do not have a pre-positioning structure and it is difficult to quickly achieve accurate pre-positioning", and effectively improving the processing cycle time; 2. In this utility model, the number of bevel gears and corresponding arc-shaped clamping plates is greater than three, which can form multiple clamping force points (more than three) evenly distributed in the circumferential direction. This fully adapts to the force characteristics of the thin-walled annular structure of the inner ring of the deep groove ball bearing, and avoids the workpiece from producing slight elastic deformation or positioning eccentricity. This solves the problem of "few clamping units and uneven force affecting machining accuracy" in the background technology, and ultimately meets the stringent tolerance requirements for high-precision machining of the inner ring of the deep groove ball bearing. 3. This utility model generates a reverse preload force through the elastic deformation of the spring, which not only achieves flexible buffering of the clamping force and avoids slight deformation of the inner ring of the deep groove ball bearing caused by rigid contact, but also ensures that the arc-shaped clamping plate fits tightly with the inner ring. 4. This utility model can precisely limit the maximum compression of the spring when the arc-shaped clamping plate moves towards the connecting shell by using the stop block, avoiding permanent deformation or fatigue damage to the spring due to excessive compression, ensuring the long-term stable working performance of the elastic component. At the same time, by limiting the maximum compression, the upper limit of the clamping force can be controlled, preventing irreversible elastic deformation or surface damage to the inner ring of the deep groove ball bearing due to excessive clamping force, ensuring that the processing accuracy is not affected. In addition, the synchronous clamping of multiple arc-shaped clamping plates can be judged by whether the arc-shaped clamping plate is close to the stop block. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the specific structure of the top of this utility model; Figure 3 This is a schematic diagram of the specific structure of the present invention after removing the prepositioning ring; Figure 4 This utility model Figure 3 Enlarged view of the local structure of A; Figure 5 This is a schematic diagram of the specific structure of the elastic component in this utility model; Figure 6 This is a schematic diagram of the internal structure of the connecting shell in this utility model.

[0014] In the diagram: 1. Positioning platform; 2. Pre-positioning ring; 201. Through groove; 3. Main bevel gear; 4. Motor; 5. Split bevel gear; 6. Pushing assembly; 601. Push rod; 602. Support bearing; 603. Bearing seat; 604. Threaded sleeve; 605. Guide rail A; 606. Slider A; 607. Connecting plate; 7. Arc-shaped clamping plate; 8. Elastic assembly; 801. Base block; 802. Vertical rod; 803. Connecting shell; 804. Inner plate; 805. Spring; 806. Connecting rod; 807. Guide rail B; 808. Slider B; 809. Stop; 9. Mounting bracket. Detailed Implementation

[0015] like Figure 1-6As shown, this utility model provides a machining and positioning fixture for the inner ring of a deep groove ball bearing, including a positioning table 1. A pre-positioning ring 2 is fixedly connected to the top of the positioning table 1, and the inner ring of the deep groove ball bearing is fitted on it. A motor 4 is installed at the bottom of the positioning table 1 to drive the main bevel gear 3 at its top to rotate. Multiple sub-bevel gears 5 are meshed on the main bevel gear 3 and distributed circumferentially around the main bevel gear 3. The number of sub-bevel gears 5 is greater than three. Each sub-bevel gear 5 is connected to a pushing component 6. An arc-shaped clamping plate 7 is connected to the pushing part of the pushing component 6. The pre-positioning ring 2 has a through groove 201 for the arc-shaped clamping plate 7 to pass through. The arc-shaped clamping plate 7 passes through the through groove 201 to fix the inner ring of the deep groove ball bearing. A mounting bracket 9 for mounting the motor 4 is installed at the bottom of the positioning table 1.

[0016] In use, the inner ring of the deep groove ball bearing is first fitted onto the pre-positioning ring 2 at the top of the positioning table 1. The structure of the pre-positioning ring 2 directly provides a reliable pre-positioning reference for the inner ring, effectively improving the machining cycle time. Then, the motor 4 at the bottom of the positioning table 1 is started, and the motor 4 drives the main bevel gear 3 at its top to rotate. Since the main bevel gear 3 meshes with multiple peripheral bevel gears 5 arranged in a circular pattern around it (more than three in number), the rotational power of the main bevel gear 3 can be synchronously transmitted to each peripheral bevel gear 5, driving all the peripheral bevel gears 5 to rotate synchronously, thereby causing the push assembly 6 connected to each peripheral bevel gear 5 to rotate synchronously. The synchronous linear pushing action is generated. The pushing part of the pushing component 6 drives the arc-shaped clamping plate 7 to pass through the through groove 201 on the prepositioning ring 2, forming a multi-point synchronous clamping of the inner ring of the deep groove ball bearing sleeved on the prepositioning ring 2 from the circumferential direction. Since the number of bevel gears 5 and corresponding arc-shaped clamping plates 7 is greater than three, multiple clamping force points (greater than three) can be evenly distributed in the circumferential direction, which fully adapts to the force characteristics of the thin-walled annular structure of the inner ring of the deep groove ball bearing, avoids the workpiece from producing slight elastic deformation or positioning eccentricity, and meets the strict tolerance requirements of high-precision machining of the inner ring groove of the deep groove ball bearing.

[0017] The following is the specific structure of the pushing component 6: The pushing component 6 includes a pushing rod 601 fixed on the surface of the bevel gear 5 away from the main bevel gear 3. A support bearing 602 is sleeved on the outer side wall of the pushing rod 601 near the bevel gear 5, and the pushing rod 601 is fixed to the inner ring of the support bearing 602. The support bearing 602 is fixed to the top surface of the positioning table 1 through the bearing seat 603. A thread is opened on the outer side wall of the pushing rod 601 away from the bevel gear 5, and a threaded sleeve 604 is threadedly connected through the thread. A guide rail A605 for sliding the slider A606 is fixedly connected to the top surface of the positioning table 1 and the parallel part of the pushing rod 601. The surface of the slider A606 is fixed to the threaded sleeve 604 through the connecting plate 607. The connecting plate 607 is connected to the arc-shaped clamping plate 7.

[0018] When motor 4 drives the main bevel gear 3 to rotate forward, the intermediate bevel gear 5 rotates under the drive of the main bevel gear 3. The push rod 601, fixed to the side of the intermediate bevel gear 5 away from the main bevel gear 3, rotates synchronously with the intermediate bevel gear 5. The support bearing 602 provides stable support for the rotation of the push rod 601. The part of the push rod 601 away from the intermediate bevel gear 5 is connected to the threaded sleeve 604 via threads. Simultaneously, the threaded sleeve 604 is fixed to the slider A606 via the connecting plate 607. The slider A606 can slide along the guide rail A605 parallel to the push rod 601. This connection... The structure restricts the threaded sleeve 604 from rotating with the push rod 601, so that the rotational motion of the push rod 601 is converted into the linear motion of the threaded sleeve 604 along the axial direction of the push rod 601. Finally, the threaded sleeve 604 drives the arc-shaped clamping plate 7 to move linearly (moving outward from the prepositioning ring 2) through the connecting plate 607, so that the arc-shaped clamping plate 7 passes through the through groove 201 of the prepositioning ring 2 to clamp the inner ring of the deep groove ball bearing. Conversely, when the motor 4 drives the main bevel gear 3 to reverse, the arc-shaped clamping plate 7 retracts (retracts into the prepositioning ring 2).

[0019] The aforementioned main bevel gear 3 simultaneously meshes with multiple peripheral bevel gears 5 (more than three) that are distributed circumferentially around it, ensuring that all peripheral bevel gears 5 rotate synchronously at the same time and with the same rotation angle. Then, through the linkage of components such as the push rod 601 and the threaded sleeve 604, all arc-shaped clamping plates 7 are driven to achieve completely synchronous extension and retraction, avoiding the problem of uneven clamping force distribution caused by transmission delay or asynchrony. This fully adapts to the force requirements of the thin-walled annular structure of the inner ring of the deep groove ball bearing and effectively prevents it from generating slight elastic deformation or positioning eccentricity.

[0020] Furthermore, the connecting plates 607 are all connected to the arc-shaped clamping plate 7 via the elastic component 8. The specific structure of the elastic component 8 is as follows: The elastic component 8 includes a bottom block 801 fixed on the surface of the connecting plate 607. The top two sides of the bottom block 801 are connected to the connecting shell 803 facing the through groove 201 via vertical rods 802. An inner plate 804 is slidably connected inside the connecting shell 803, and a spring 805 is installed between the inner plate 804 and the inner surface of the connecting shell 803. The other side of the inner plate 804 connected to the spring 805 is connected to the arc-shaped clamping plate 7 via a connecting rod 806. The upper and lower sides of the inside of the connecting shell 803 are fixedly connected to guide rails B807 for sliding sliders B808. The inner plate 804 is fixed between the sliders B808.

[0021] When the connecting plate 607 moves outward from the pre-positioned ring 2 under the drive of the pushing component 6, the bottom block 801 fixed on the surface of the connecting plate 607 synchronously drives the connecting shell 803 to move through the vertical rod 802. The inner plate 804 inside the connecting shell 803 maintains a straight sliding guide under the cooperation of the slider B808 and the guide rail B807 to avoid deviation. When the arc-shaped clamping plate 7 contacts the inner ring of the deep groove ball bearing, the inner ring generates a reverse force on the arc-shaped clamping plate 7. This force is transmitted to the inner plate 804 through the connecting rod 806, causing the inner plate 804 to move. 04 slides into the connecting shell 803 and compresses the spring 805. The elastic deformation of the spring 805 generates a reverse preload force, which not only achieves flexible buffering of the clamping force and avoids slight deformation of the inner ring of the deep groove ball bearing caused by rigid contact, but also ensures that the arc-shaped clamping plate 7 fits tightly with the inner ring. Conversely, when the connecting plate 607 drives the connecting shell 803 to retract, the spring 805 restores its deformation, pushes the inner plate 804 to reset along the guide rail B807, and then drives the arc-shaped clamping plate 7 to retract synchronously through the connecting rod 806, ensuring the smoothness of the clamping and releasing actions.

[0022] Furthermore, the side end of the connecting shell 803 is detachably connected to a stop 809 that, when the arc-shaped clamping plate 7 moves toward the connecting shell 803, blocks it to the maximum extent of its compression spring 805.

[0023] The stop block 809 can precisely limit the maximum compression of the spring 805 when the arc-shaped clamping plate 7 moves towards the connecting shell 803, avoiding permanent deformation or fatigue damage to the spring 805 due to excessive compression, ensuring the long-term stable working performance of the elastic component 8. At the same time, by limiting the maximum compression, the upper limit of the clamping force can be controlled, preventing irreversible elastic deformation or surface damage to the inner ring of the deep groove ball bearing (especially thin-walled structures) due to excessive clamping force, ensuring that the machining accuracy is not affected. In addition, the synchronous clamping of multiple arc-shaped clamping plates 7 can be judged by whether the arc-shaped clamping plate 7 is close to the stop block 809. The detachable design of the stop block 809 allows for the replacement of stop blocks 809 with different thicknesses or limit strokes according to the size requirements of the inner ring of the deep groove ball bearing of different specifications, flexibly adjusting the maximum compression degree of the spring 805 and the upper limit of the clamping force, enhancing the adaptability of the fixture to inner rings with different inner diameters.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A machining and positioning fixture for the inner ring of a deep groove ball bearing, characterized in that: The system includes a positioning platform (1), with a pre-positioning ring (2) fixedly connected to the top of the positioning platform (1), and the inner ring of the deep groove ball bearing fitted on it. A motor (4) is installed at the bottom of the positioning platform (1) to drive the main bevel gear (3) at its top to rotate. Multiple bevel gears (5) are meshed on the main bevel gear (3) and are distributed in a circular pattern around the main bevel gear (3). The number of bevel gears (5) is greater than three. Each bevel gear (5) is connected to a push assembly (6). An arc-shaped clamping plate (7) is connected to the push part of the push assembly (6). The pre-positioning ring (2) has a through groove (201) for the arc-shaped clamping plate (7) to pass through. The arc-shaped clamping plate (7) passes through the through groove (201) to fix the inner ring of the deep groove ball bearing.

2. The machining and positioning fixture for the inner ring of a deep groove ball bearing according to claim 1, characterized in that: The pushing assembly (6) includes a pushing rod (601) fixed on the surface of the bevel gear (5) away from the main bevel gear (3). A support bearing (602) is sleeved on the outer side wall of the pushing rod (601) near the bevel gear (5), and the pushing rod (601) is fixed to the inner ring of the support bearing (602). The support bearing (602) is fixed to the top surface of the positioning table (1) through the bearing seat (603). A thread is opened on the outer side wall of the pushing rod (601) away from the bevel gear (5), and a threaded sleeve (604) is threaded through the thread. A guide rail A (605) for sliding slider A (606) is fixedly connected on the top surface of the positioning table (1) and the parallel part of the pushing rod (601). The surface of slider A (606) is fixed to the threaded sleeve (604) through the connecting plate (607). The connecting plate (607) is connected to the arc-shaped clamping plate (7).

3. The machining and positioning fixture for the inner ring of a deep groove ball bearing according to claim 2, characterized in that: The connecting plates (607) are all connected to the arc-shaped clamping plates (7) through elastic components (8).

4. The machining and positioning fixture for the inner ring of a deep groove ball bearing according to claim 3, characterized in that: The elastic component (8) includes a bottom block (801) fixed to the surface of the connecting plate (607). The top two sides of the bottom block (801) are connected to the connecting shell (803) facing the through groove (201) via vertical rods (802). An inner plate (804) is slidably connected inside the connecting shell (803), and a spring (805) is installed between the inner plate (804) and the inner surface of the connecting shell (803). The other side of the inner plate (804) connected to the spring (805) is connected to the arc-shaped clamping plate (7) via a connecting rod (806).

5. The machining and positioning fixture for the inner ring of a deep groove ball bearing according to claim 4, characterized in that: The connecting shell (803) has guide rails B (807) fixedly connected to the upper and lower sides of the interior for sliding slider B (808), and the inner plate (804) is fixed between sliders B (808).

6. The machining and positioning fixture for the inner ring of a deep groove ball bearing according to claim 1, characterized in that: The bottom of the positioning platform (1) is equipped with a mounting bracket (9) for mounting the motor (4).

7. The machining and positioning fixture for the inner ring of a deep groove ball bearing according to claim 4, characterized in that: The side end of the connecting shell (803) is detachably connected to a stop (809) that blocks the arc-shaped clamping plate (7) against the connecting shell (803) to limit the maximum extent of its compression spring (805) when the arc-shaped clamping plate (7) moves toward the connecting shell (803).

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