Bearing inner ring polishing positioning fixture

Abstract

The utility model discloses bearing inner race polishing positioning fixture, especially relates to bearing processing field, bearing inner race polishing positioning fixture, including support frame and fixedly connected on the mounting shell of support frame, be equipped with the positioning assembly on the support frame, and the output of positioning assembly is connected with a plurality of guide blocks, and positioning assembly is used for driving a plurality of guide blocks along the synchronous movement of preset direction, and a plurality of parallel inclined sliding slots are seted up on the guide block, and the positioning block is slidably connected on the guide block, and the bottom of positioning block is equipped with a plurality of parallel first protruding blocks, and first protruding block and inclined sliding slot slidingly connect. The utility model discloses a drive source combines the design and the unique inclined sliding slot and the cooperation mechanism of first protruding block of rack and pinion drive module, guarantees that a plurality of fixture bodies can synchronously, concentricly to bearing inner race exert even clamping force, effectively avoids the workpiece deformation or positioning deviation caused by uneven clamping, and greatly improves the precision of polishing processing.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and more specifically, to a bearing inner ring grinding and positioning fixture. Background Technology

[0002] The bearing inner ring grinding positioning fixture is a special fixture used to fix the bearing inner ring. Its core function is to ensure the precise positioning between the inner ring and the shaft during grinding or machining, and to prevent displacement caused by vibration or external force. The fixture is usually made of rigid material and uses mechanical clamping or interference fit to firmly fix the inner ring on the shaft, thereby ensuring the uniformity of grinding and dimensional accuracy.

[0003] In traditional bearing inner ring grinding, positioning fixtures rely on multiple independently controlled pneumatic or hydraulic drive units to push each jaw individually. Due to the inevitable slight differences in response speed, output force, and stroke of each drive unit, it is difficult to achieve absolute synchronous movement of all jaws in time and space. This asynchrony causes the multiple clamping forces acting on the bearing inner ring to be unevenly distributed. Some jaws have already made contact and applied force, while others are still in motion. This creates an unbalanced radial pressure on the workpiece at the moment of clamping, causing imperceptible micro-elastic deformation or slight overall eccentricity in the thin-walled bearing inner ring. This initial clamping defect will be replicated and amplified in subsequent high-precision grinding, ultimately resulting in problems such as roundness deviation and cylindricity error in the finished inner ring, which seriously reduces the bearing's rotational accuracy, dynamic balance, and service life, and fails to meet the manufacturing requirements of high-precision bearings.

[0004] In summary, to improve grinding accuracy, it is necessary to address the problem that the multiple clamping forces acting on the bearing inner ring by the traditional bearing inner ring grinding positioning fixture cannot be evenly distributed, resulting in micro-elastic deformation or slight overall eccentricity of the bearing inner ring. The positioning fixture should be able to apply uniform clamping force to the bearing inner ring synchronously and concentrically. Utility Model Content

[0005] The bearing inner ring grinding and positioning fixture provided by this utility model is intended to solve the problem that the multiple clamping forces acting on the bearing inner ring of traditional bearing inner ring grinding and positioning fixtures cannot be evenly distributed, resulting in micro-elastic deformation or slight overall eccentricity of the bearing inner ring.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bearing inner ring grinding positioning fixture, comprising a support frame and a mounting housing fixedly connected to the support frame. A positioning component is mounted on the support frame, and the output end of the positioning component is connected to several guide blocks. The positioning component is used to drive the several guide blocks to move synchronously along a preset direction. Several parallel inclined grooves are provided on the guide blocks, and positioning blocks are slidably connected to the guide blocks. Several parallel first protrusions are provided at the bottom of the positioning blocks, and the first protrusions are slidably connected to the inclined grooves. A T-shaped groove is provided at the top of the positioning blocks, and an installation block is provided on the positioning blocks. A T-shaped protrusion is provided at the bottom of the installation block, and the T-shaped protrusion is connected to the T-shaped groove. A fixture body is fixedly connected to the side of the installation block near the center of the mounting housing, and a second protrusion is provided at the bottom of the fixture body.

[0007] In a preferred embodiment, the positioning component includes a drive module mounted on a support frame and a transmission module mounted inside a mounting housing. The input end of the transmission module is connected to the output end of the drive module. Both the transmission module and the drive module are connected to a guide block. The drive module is used to drive the guide block to move in a preset direction and transmit power to the transmission module, so that the transmission module drives the guide block to move in the preset direction.

[0008] In a preferred embodiment, the drive module includes a DC reversible motor fixedly connected to a support frame, a threaded rod fixedly connected to the output end of the DC reversible motor, and an active slider threadedly connected to the threaded rod. The threaded rod is rotatably connected inside the mounting housing, and the active slider and guide block are fixedly connected. The DC reversible motor is used to drive the threaded rod to rotate.

[0009] In a preferred embodiment, the transmission module includes a first rack slidably connected to the mounting housing, a gear rotatably connected to the center of the mounting housing, two driven sliders slidably connected to the mounting housing, and a second rack fixedly connected to the driven sliders. The first rack is fixedly connected to the driving slider, and both the first rack and the second rack are meshed with the gear. The driven slider is fixedly connected to the guide block.

[0010] In a preferred embodiment, the mounting housing has a circumferential array of limiting grooves, which are slidably connected to the positioning block. Two guide rods are fixedly connected inside the mounting housing, and the guide rods are slidably connected to the driven slider.

[0011] In a preferred embodiment, the positioning block has a locking hole, and the mounting block has several through holes, in which a quick-release component is installed.

[0012] In a preferred embodiment, the quick-release assembly includes a button slidably connected in a through hole, a fixed sleeve fixedly connected to the bottom of the through hole, a compression spring fixedly connected between the button and the fixed sleeve, and a plurality of steel balls movably connected to the fixed sleeve. The fixed sleeve, the steel balls, and the lock hole are movably connected.

[0013] In a preferred embodiment, a vacuum cleaner is provided at the bottom of the mounting housing, and a chip removal pipe is fixedly connected between the vacuum cleaner and the mounting housing.

[0014] The beneficial effects of this utility model are as follows: This invention, through a design combining a drive source with a gear and rack transmission module, ensures that the movement of all guide blocks is strictly synchronized. At the same time, the unique inclined slide and the first protrusion cooperation mechanism transform the horizontal linear input into a precise clamping trajectory that conforms to the inner ring contour of the bearing. This ensures that multiple clamping bodies can apply uniform clamping force to the inner ring of the bearing synchronously and concentrically, effectively avoiding workpiece deformation or positioning deviation caused by uneven clamping, and greatly improving the accuracy of grinding.

[0015] This invention utilizes a quick-release assembly to connect the positioning block and the mounting block. When changing bearing models, operators only need to press a button to quickly remove the entire clamp body. After replacement, it can be locked with steel balls. No tools are required, and the process takes very little time. This allows the equipment to quickly adapt to the production of bearings of different sizes, greatly improving production flexibility and efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the positioning component structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the drive module structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the mounting block of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the mounting block of this utility model.

[0022] Figure 7 This is a schematic diagram of the quick-release component structure of this utility model.

[0023] Figure 8 This is a schematic diagram of another embodiment of the drive module of this utility model.

[0024] The attached figures are labeled as follows: 1. Support frame; 2. Mounting housing; 201. Limiting groove; 301. DC reversible motor; 302. Threaded rod; 303. Active slider; 401. First rack; 402. Gear; 403. Second rack; 404. Driven slider; 5. Guide rod; 6. Guide block; 601. Inclined slide groove; 7. Positioning block; 701. First protrusion; 702. T-shaped slide groove; 703. Locking hole; 8. Mounting block; 801. T-shaped protrusion; 802. Through hole; 9. Clamp body; 901. Second protrusion; 1001. Button; 1002. Compression spring; 1003. Fixing sleeve; 1004. Steel ball; 11. Chip removal pipe; 12. Vacuum cleaner; 13. Electric push rod. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Refer to the instruction manual appendix Figures 1 to 8 The bearing inner ring grinding positioning fixture includes a support frame 1 and a mounting housing 2 fixedly connected to the support frame 1. A positioning component is installed on the support frame 1. The output end of the positioning component is connected to several guide blocks 6. The positioning component is used to drive several guide blocks 6 to move synchronously in a preset direction. Several parallel inclined slide grooves 601 are provided on the guide blocks 6. A positioning block 7 is slidably connected to the guide blocks 6. Several parallel first protrusions 701 are provided at the bottom of the positioning block 7. The first protrusions 701 and the inclined slide grooves 601 are slidably connected. A T-shaped slide groove 702 is provided at the top of the positioning block 7. An mounting block 8 is provided on the positioning block 7. A T-shaped protrusion 801 is provided at the bottom of the mounting block 8. The T-shaped protrusion 801 and the T-shaped slide groove 702 are connected. A fixture body 9 is fixedly connected to the side of the mounting block 8 near the center of the mounting housing 2. A second protrusion 901 is provided at the bottom of the fixture body 9.

[0027] It should be noted that the guide block 6 and the positioning block 7 correspond one-to-one and are arranged in a circular array on the mounting housing 2. The inclined groove 601 on the guide block 6 is an inclined parallelogram channel. When the drive module drives the guide block 6 to make horizontal linear movement, the first protrusion 701 fixed at the bottom of the positioning block 7 is constrained to slide in this inclined groove, so that multiple positioning blocks 7 can move synchronously along different preset paths, thereby better adapting to the contour of the bearing inner ring or realizing a specific clamping trajectory, ensuring the uniform distribution of clamping force and the accuracy of positioning.

[0028] Another embodiment based on the clamp body 9: A pressure sensor is added to the surface of the clamp body 9 so that the pressure sensor is in direct contact with the bearing to be processed. The force applied to the bearing by the clamp body 9 is measured in real time and converted into an electrical signal to the external PLC control system. The PLC control system transmits control signals to the positioning component to accurately control the clamping force applied to the bearing by the clamp body 9, so as to avoid inaccurate positioning due to insufficient clamping force or deformation of the bearing due to excessive clamping force.

[0029] Refer to the instruction manual appendix Figure 3 The positioning component includes a drive module mounted on the support frame 1 and a transmission module mounted in the mounting housing 2. The input end of the transmission module is connected to the output end of the drive module. Both the transmission module and the drive module are connected to the guide block 6. The drive module is used to drive the guide block 6 to move in a preset direction and transmit power to the transmission module, so that the transmission module drives the guide block 6 to move in the preset direction.

[0030] It should be noted that the drive module, as the power source, transmits power to each guide block 6 through the transmission module, thereby achieving synchronous movement of multiple guide blocks 6 and clamping the bearing.

[0031] Refer to the instruction manual appendix Figure 4 The drive module includes a DC reversible motor 301 fixedly connected to the support frame 1, a threaded rod 302 fixedly connected to the output end of the DC reversible motor 301, and an active slider 303 threadedly connected to the threaded rod 302. The threaded rod 302 is rotatably connected inside the mounting housing 2. The active slider 303 is fixedly connected to the guide block 6. The DC reversible motor 301 is used to drive the threaded rod 302 to rotate.

[0032] It should be noted that the DC reversible motor 301 is mounted on the support frame 1. The rotational motion output by the DC reversible motor 301 is converted into the linear motion of the active slider 303 through the threaded rod 302. The DC reversible motor 301 can support bidirectional output torque to realize the reciprocating motion of the active slider 303. The active slider 303 is provided with a through threaded hole, and the size of the threaded hole is adapted to the threaded rod 302.

[0033] Please refer to another embodiment based on the driver module. Figure 8 The DC reversible motor 301 is improved into an electric push rod 13, and the threaded rod 302 is replaced with a guide rod 5. The active slider 303 is directly pushed by the electric push rod 13 to slide back and forth on the guide rod 5, which makes it easier to connect with the existing support frame 1 and active slider 303, reduces the difficulty of installation and debugging, and lowers the requirements for the control circuit.

[0034] Refer to the instruction manual appendix Figure 3 and Figure 4The transmission module includes a first rack 401 slidably connected to the mounting housing 2, a gear 402 rotatably connected to the center of the mounting housing 2, two driven sliders 404 slidably connected to the mounting housing 2, and a second rack 403 fixedly connected to the driven sliders 404. The first rack 401 and the driving slider 303 are fixedly connected. The first rack 401 and the second rack 403 are both meshed with the gear 402. The driven sliders 404 and the guide block 6 are fixedly connected.

[0035] It should be noted that the linear motion of the active slider 303 is transmitted to the central gear 402 through the first rack 401. The gear 402 then transmits the motion synchronously to the two second racks 403 that mesh with it, thereby driving the two driven sliders 404 to perform linear motion at the same speed as the active slider 303. This achieves the simultaneous control of three sliders by one drive source to converge towards the center or disperse from the center synchronously.

[0036] Refer to the instruction manual appendix Figure 3 The mounting housing 2 has a circumferential array of limiting grooves 201, which are slidably connected to the positioning block 7. Two guide rods 5 are fixedly connected inside the mounting housing 2, and the guide rods 5 are slidably connected to the driven slider 404.

[0037] It should be noted that the limiting groove 201 is adapted to the size of the positioning block 7 to limit the movement of the positioning block 7. The driven slider 404 has a smooth through hole with the same size as the guide rod 5, so that the driven slider 404 moves along the guide rod 5.

[0038] Refer to the instruction manual appendix Figure 5 The positioning block 7 has a locking hole 703, and the mounting block 8 has several through holes 802, in which quick-release components are installed.

[0039] It should be noted that the inner diameter of the keyhole 702 opening is smaller than the inner diameter of the inner hole, the through hole 802 is a through hole, and the inner diameter of the through hole 802 is the same as the inner diameter of the keyhole 703 opening.

[0040] Refer to the instruction manual appendix Figure 7 The quick-release assembly includes a button 1001 slidably connected in the through hole 802, a fixing sleeve 1003 fixedly connected to the bottom of the through hole 802, a compression spring 1002 fixedly connected between the button 1001 and the fixing sleeve 1003, and several steel balls 1004 movably connected to the fixing sleeve 1003. The fixing sleeve 1003, the steel balls 1004 and the lock hole 703 are movably connected.

[0041] It should be noted that in the locked state, the spring force of the compression spring 1002 presses part of the steel ball 1004 into the locking hole 703 of the positioning block 7. Since the inner diameter of the opening of the locking hole 703 is smaller than the inner diameter of the inner hole, a mechanical interlock is formed, thereby firmly locking the mounting block 8 onto the positioning block 7. When it is necessary to replace the clamp body 9 to adapt to different models of bearings, simply press the button 1001 to overcome the spring force and move the fixing sleeve 1003 inward. The steel ball 1004 can then roll back and disengage from the locking hole 703, and the mounting block 8 can be quickly removed.

[0042] Refer to the instruction manual appendix Figure 2 A vacuum cleaner 12 is provided at the bottom of the mounting housing 2, and a chip removal pipe 11 is fixedly connected between the vacuum cleaner 12 and the mounting housing 2.

[0043] It should be noted that the mounting housing 2 has a hollow hole in the center, and the chip removal pipe 11 is installed below and connected to this hollow hole. When the bearing is polished, the polished chips fall directly into the chip removal pipe under the influence of gravity, and are simultaneously adsorbed by the vacuum cleaner 12. Since the bottom of the clamp body 9 has a second protrusion 901, the vacuum cleaner 12 will not interfere with the fixing of the bearing. On the contrary, the bearing can be adsorbed on the second protrusion 901 by the strong suction.

[0044] Working principle: The DC reversible motor 301 is started, driving the threaded rod 302 to rotate. The threaded rod 302 drives the active slider 303 to perform precise linear motion. The motion of the active slider 303 is transmitted in two ways: one way directly drives a guide block 6 fixedly connected to it to move; the other way drives the gear 402 at the center of the mounting housing 2 to rotate through the first rack 401. The gear 402 then drives the two second racks 403 meshing with it to move, thereby driving the two driven sliders 404 fixed to the second racks 403 to slide along the guide rod 5, achieving linear motion synchronized with the active slider 303. Each driven slider 404 also drives a guide block 6, achieving synchronous radial movement of multiple guide blocks 6. When the guide block 6 moves horizontally, the inclined groove 601 on it forces the first protrusion 701 at the bottom of the positioning block 7 to produce a combined motion, thereby driving the positioning block 7 to move along the limiting groove 201 on the mounting housing 2 in the horizontal plane. The T-shaped groove 702 on the top of the positioning block 7 is connected to the T-shaped protrusion 801 on the bottom of the mounting block 8. In the locked state, the elastic force of the compression spring 1002 presses part of the steel ball 1004 into the locking hole 703 of the positioning block 7. Since the inner diameter of the opening of the locking hole 703 is smaller than the inner diameter of the inner hole, a mechanical interlock is formed, thereby firmly locking the mounting block 8 on the positioning block 7. When it is necessary to replace the clamp body 9 to adapt to different models of bearings, simply press the button 1001 to overcome the spring force and move the fixing sleeve 1003 inward. The steel ball 1004 can then roll back and disengage from the locking hole 703, and the mounting block 8 can be quickly removed. Finally, the clamp body 9 moves along with it, clamps the bearing, and uses the second protrusion 901 at its bottom to provide support from the bottom. At the same time, the vacuum cleaner 12 connected to the bottom of the mounting housing 2 through the chip removal pipe 11 is started. The grinding debris falls into the chip removal pipe 11 through the hollow hole in the center of the mounting housing 2 and is sucked away.

[0045] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A bearing inner race grinding positioning fixture, characterized in that: Includes a support frame (1) and a mounting housing (2) fixedly connected to the support frame (1). A positioning component is mounted on the support frame (1). The output end of the positioning component is connected to several guide blocks (6). The positioning component is used to drive the several guide blocks (6) to move synchronously along a preset direction. Several parallel inclined slide grooves (601) are provided on the guide blocks (6). A positioning block (7) is slidably connected to the guide block (6). Several parallel first protrusions (701) are provided at the bottom of the positioning block (7). The first protrusions (701) and the inclined slide grooves (601) are connected to the positioning block (6). 01) Sliding connection, the top of the positioning block (7) is provided with a T-shaped groove (702), the positioning block (7) is provided with an installation block (8), the bottom of the installation block (8) is provided with a T-shaped protrusion (801), the T-shaped protrusion (801) and the T-shaped groove (702) are connected, the side of the installation block (8) near the center of the installation housing (2) is fixedly connected with a clamp body (9), the bottom of the clamp body (9) is provided with a second protrusion (901), the positioning component includes a drive module installed on the support frame (1) and a transmission module installed in the installation housing (2); The drive module includes a DC reversible motor (301) fixedly connected to the support frame (1), a threaded rod (302) fixedly connected to the output end of the DC reversible motor (301), and an active slider (303) threadedly connected to the threaded rod (302). The threaded rod (302) is rotatably connected inside the mounting housing (2). The active slider (303) and the guide block (6) are fixedly connected. The DC reversible motor (301) is used to drive the threaded rod (302) to rotate. The transmission module includes a first rack (401) slidably connected to the mounting housing (2), a gear (402) rotatably connected to the center of the mounting housing (2), two driven sliders (404) slidably connected to the mounting housing (2), and a second rack (403) fixedly connected to the driven sliders (404). The first rack (401) and the driving slider (303) are fixedly connected. The first rack (401) and the second rack (403) are both meshed with the gear (402). The driven slider (404) and the guide block (6) are fixedly connected.

2. The bearing inner race polishing fixture of claim 1, wherein: The mounting housing (2) has a circumferential array of limiting grooves (201), the limiting grooves (201) and the positioning block (7) are slidably connected, and two guide rods (5) are fixedly connected inside the mounting housing (2), the guide rods (5) and the driven slider (404) are slidably connected.

3. The bearing inner race polishing fixture of claim 1, wherein: The positioning block (7) has a lock hole (703), and the mounting block (8) has several through holes (802), with quick-release components installed in the through holes (802).

4. The bearing inner race polishing fixture of claim 3, wherein: The quick-release assembly includes a button (1001) slidably connected in the through hole (802), a fixed sleeve (1003) fixedly connected to the bottom of the through hole (802), a compression spring (1002) fixedly connected between the button (1001) and the fixed sleeve (1003), and several steel balls (1004) movably connected to the fixed sleeve (1003). The fixed sleeve (1003), the steel balls (1004), and the lock hole (703) are movably connected.

5. The bearing inner race polishing fixture of claim 1, wherein: The bottom of the mounting shell (2) is provided with a dust collector (12), and a chip removal pipeline (11) is fixedly connected between the dust collector (12) and the mounting shell (2).

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