A positioning mechanism for bearing processing

Abstract

The present invention relates to a positioning mechanism for bearing processing applied in the field of bearing processing, comprising a positioning plate installed on a fixed base, the positioning plate being provided with a plurality of slide grooves extending radially along the positioning plate, the plurality of slide grooves being slidably connected with a positioning frame, the positioning plate being provided with a driving component driving the positioning frame to slide along the slide groove, and the positioning plate being provided with a limiting mechanism for adjustably limiting the positioning frame. By adopting the above-mentioned positioning frame, driving component and limiting mechanism, a grinding effect without dead angles can be achieved, and there is no need for secondary clamping of the bearing ring after it is removed, and the axial position and radial position of the bearing ring will not be changed during the grinding process, thereby ensuring the effectiveness of grinding and improving the grinding quality. At the same time, the limiting mechanism can adjustably limit the positioning frame, thereby achieving the effect of limiting or contact limiting the positioning frame, so as to better cooperate with the driving component to realize the change of the moving or fixed state of the positioning frame.

Description

Technical Field

[0001] The present invention relates to a positioning device for parts processing, in particular to a positioning mechanism for bearing processing applied in the field of bearing processing. Background Art

[0002] At present, when bearing processing equipment processes bearings, it is necessary to fix the bearings on a fixture, process one end of the bearing, and then disassemble and fix the bearing again to process the other end of the bearing. This process is relatively complicated, and the surface temperature of the bearing that has just been processed is high, which makes disassembly and assembly inconvenient, seriously affecting work efficiency and easily causing harm to workers. In order to solve this problem, the prior art uses a position-adjustable fixing device to fix the bearing. The bearing processing position is changed by adjusting the position of the fixing device, and there is no need to disassemble and assemble the bearing again.

[0003] However, when grinding bearings with this adjustable bearing processing fixture, especially when the bearing is switched to another position after processing at one position, it is difficult to ensure the matching accuracy between the grinding mechanism and the bearing clamped on the clamping mechanism, resulting in large processing errors, low bearing qualification rate, and increased production costs.

[0004] To solve the above problems, the Chinese patent CN117001441B specification discloses a surface grinding device for bearing processing, which mainly includes a processing platform and a left processing block and a right processing block symmetrically arranged on the processing platform. The left processing block and the right processing block both include a driving mechanism, a supporting and positioning mechanism and a grinding mechanism. The supporting and positioning mechanism is used to position the bearing. The driving mechanism drives the supporting and positioning mechanism to move and rotate left and right. The grinding mechanism elastically presses on the bearing, and the supporting and positioning mechanism drives the bearing to rotate synchronously. The grinding mechanism grinds the bearing synchronously from the left and right sides. The surface grinding device for bearing processing has grinding mechanisms symmetrically arranged on both sides of the bearing, and drives the bearing to rotate through the supporting and positioning mechanism that fixes the bearing, so that the grinding mechanism grinds the bearing synchronously from both sides of the bearing. The operation is convenient, and there is no need to adjust the bearing position. At the same time, the consistency of the processing on both sides of the bearing is ensured, and the processing error is reduced.

[0005] In the above-mentioned prior art, although the inner ring and outer ring of the bearing ring can be polished simultaneously to improve the accuracy of bearing polishing, in the actual polishing process, since a part of the inner ring of the bearing is always pressed tightly by the supporting positioning mechanism, there is an unpolished area in the inner ring of the bearing, and a secondary polishing is still required to compensate for the position. During the two polishing processes, slight axial movement and radial movement may still occur, which affects the polishing accuracy and reduces the quality of the finished bearing ring after polishing. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to provide a positioning mechanism for bearing processing that does not require secondary grinding of the nature of re-positioning, can always maintain a stable clamping state of the bearing ring, and can grind the inner and outer sides of the bearing ring in turn, so as to improve the positioning accuracy of the bearing ring during the grinding process and improve the finished product quality of the bearing ring.

[0007] In order to solve the above problems, the present invention provides a positioning mechanism for bearing processing, comprising a positioning plate mounted on a fixed base, the positioning plate is provided with a plurality of slide grooves extending radially along the positioning plate, and a positioning frame is slidably connected in each of the plurality of slide grooves;

[0008] The positioning frame is in a U-shaped frame, and the two ends of the positioning frame are close to each other and extend a certain distance;

[0009] A driving assembly for driving the positioning frame to slide along the slide groove is installed in the positioning plate;

[0010] The driving component first drives at least two symmetrically arranged positioning frames to move in opposite directions. When the at least two symmetrically arranged positioning frames are in different clamping states from other positioning frames, the driving component again drives at least two other symmetrically arranged positioning frames to move in opposite directions, and finally makes the clamping states of the two positioning frames moving in the rear consistent with those of the two positioning frames moving in the front.

[0011] The clamping state includes clamping the outer wall of the bearing ring and clamping the inner wall of the bearing ring;

[0012] A limiting mechanism for adjusting the positioning frame is also installed in the positioning plate, and the limiting mechanism is linked with the driving component.

[0013] In the above-mentioned positioning mechanism for bearing processing, the driving component is first used to drive at least two symmetrically arranged positioning frames to move in opposite directions. When the at least two symmetrically arranged positioning frames are in different clamping states from the other positioning frames, the driving component drives at least two other symmetrically arranged positioning frames to move in opposite directions again, and finally the clamping states of the two positioning frames moving later are consistent with the clamping states of the two positioning frames moving in front, thereby gradually changing the clamping state of the positioning frames on the bearing ring from clamping the outer ring of the bearing ring to clamping the inner ring of the bearing ring, thereby achieving the change of the clamping state under the premise of ensuring clamping, so that the outer ring or the inner ring of the bearing ring is fully polished in turn, so as to achieve a completely dead angle-free polishing effect, and there is no need to perform secondary clamping on the bearing ring after removing it, and the axial position and radial position of the bearing ring will not be changed during the polishing process, thereby ensuring the effectiveness of polishing and improving the polishing quality;

[0014] At the same time, the limiting mechanism can perform adjustable limiting on the positioning frame, thereby achieving the effect of limiting or contact limiting the positioning frame, so as to better cooperate with the driving component to realize the change of the moving or fixed state of the positioning frame.

[0015] As a further supplement to the present application, the drive assembly includes a plurality of drive units, a transmission member and a drive motor, the drive motor is fixed to the rear side of the positioning plate, the number of the drive units corresponds to the number of the positioning frames and the plurality of drive units correspond one to one to the plurality of positioning frames, a plurality of transmission members are provided and used to transmit between the drive motor and the plurality of drive units, so that the plurality of drive units rotate synchronously in the same direction;

[0016] The plurality of drive units have the same structure but are arranged in different ways. The plurality of drive units can asynchronously drive the plurality of positioning frames to change the clamping state through different arrangements.

[0017] As a further supplement to the present application, the drive unit includes a drive gear, a rack and a drive shaft. The drive gear is fixed to the drive shaft, and the drive shaft is rotatably connected to the positioning plate. The rack is fixed to the rear side of the positioning frame and meshes with the drive gear. The teeth on the drive gear are distributed in a fan shape and the angle is not greater than 90°.

[0018] As a further supplement to the present application, two driving units corresponding to two positioning frames symmetrically distributed along the axis of the positioning plate are arranged in a mirror image;

[0019] The other two driving units corresponding to the other two positioning frames arranged at an angle of 90° with the two positioning frames have tooth distribution directions of the driving gears opposite to those of the aforementioned two driving units.

[0020] As a further supplement to the present application, two limit holes are provided on the rear side of the rack and are symmetrically arranged along the middle of the rack;

[0021] The limit mechanism is composed of several follow-up limit units, which include:

[0022] A limiting rod, one end of which is plugged into and matched with the limiting hole;

[0023] The paddle and the fan-shaped pressing piece are fixed to one end of the limit rod close to the rack and abut against the side of the rack away from the positioning frame;

[0024] The fan-shaped pressing piece is fixedly sleeved on the driving shaft, and both sides of the fan-shaped pressing piece are provided with inclined surfaces that cater to the paddle. When the fan-shaped pressing piece rotates with the driving shaft, the inclined surfaces of the fan-shaped pressing piece drive the paddle to move to the side away from the rack;

[0025] A limit spring, the limit spring is sleeved on the limit rod and one end of the limit spring is fixed to the rear side of the paddle;

[0026] An installation cavity for accommodating the driving unit and the follow-up limiting unit is provided in the positioning plate, and the other end of the limiting spring is fixed to the inner side wall of the installation cavity.

[0027] As a further supplement to the present application, one end of the drive shaft and the limit rod are both movable and penetrate the rear side of the positioning plate, the limit rod and the transmission member are staggered, and the drive shaft is connected to the transmission member in transmission.

[0028] As a further supplement to the present application, the transmission member is a gear set or a transmission pulley set.

[0029] As a further supplement to the present application, when the transmission member is a gear set, a gear is fixedly sleeved on each drive shaft, one of which is transmission-connected to the output shaft of the drive motor; the distribution and sum of the gear sets meet the need to drive multiple drive shafts to rotate synchronously in the same direction.

[0030] As a further supplement to the present application, when the transmission member is a transmission pulley group, a transmission wheel is fixedly provided on each driving shaft, and a transmission belt is provided on the transmission wheel between every two adjacent driving shafts, and the transmission wheel on one of the driving shafts is transmission-connected to the output shaft of the driving motor.

[0031] To summarize, the driving motor drives several driving shafts to rotate synchronously in the same direction through the transmission member. Since the two driving units corresponding to the two positioning frames symmetrically distributed along the axis of the positioning disk are arranged in a mirror image, and the other two driving units corresponding to the other two positioning frames arranged at a 90° angle to the two positioning frames have tooth distribution directions opposite to those of the driving gears of the aforementioned two driving units, the multiple driving shafts drive the multiple driving gears to rotate synchronously in the same direction when rotating. When the multiple driving gears rotate synchronously in the same direction, the four driving gears forming a 90° angle drive the two symmetrical positioning frames to move toward the axis of the positioning disk or toward the outside of the positioning disk in pairs, and the four positioning frames are divided into two groups opposite to each other, and the movement of the two groups of positioning frames is separated front and back, so as to achieve the purpose of gradually changing the clamping state of the positioning frame on the bearing ring, and realize the effect of changing the clamping point of the bearing ring while ensuring the clamping state of the bearing ring, so as to facilitate high-precision grinding, avoid the low qualified rate of the finished bearing ring due to the change of the axial position or radial position of the bearing ring, and improve the grinding quality;

[0032] At the same time, when one of the driving shafts rotates, it drives the corresponding fan-shaped pressure piece to rotate. When the fan-shaped pressure piece rotates to the position where the paddle position overlaps, the fan-shaped pressure piece is first guided by the inclined surface, so that the fan-shaped pressure piece moves to the side away from the rack, so that one end of the limit rod leaves the limit hole and the limit spring is compressed at the same time, so that the rack can move under the drive of the driving gear. After the rack moves to the predetermined position, the other limit hole on it corresponds to the position of the limit rod, that is, after the rack is separated from the driving gear), the fan-shaped pressure piece continues to rotate a certain angle and separates from the paddle, so that the paddle is reset under the elastic force of the limit spring, and drives one end of the limit rod to insert into the other limit hole to limit the rack, that is, the position of the positioning frame is fixed, and the bearing ring is stably clamped;

[0033] In this way, the positioning frame can be limited or contact-limited as needed, which not only meets the needs of stably clamping the bearing ring, but also meets the needs of automatically releasing the limit, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the first embodiment of the present application;

[0035] Figure 2 This is a schematic structural diagram of a half-section of the positioning plate according to the first embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of the transmission member and drive motor structure of the first embodiment of the present application;

[0037] Figure 4 This is a three-dimensional diagram of the first embodiment of the present application when the positioning frame clamps the outer ring of the bearing ring;

[0038] Figure 5 This is a front view of the first embodiment of the present application when the positioning frame clamps the outer ring of the bearing ring;

[0039] Figure 6 This is a rear view of the first embodiment of the present application when the positioning frame clamps the outer ring of the bearing ring;

[0040] Figure 7 This is an enlarged view of the positioning frame, the driving unit and the follow-up limiting unit of the first embodiment of the present application;

[0041] Figure 8 This is a schematic diagram of the positioning frame and rack structure of the first embodiment of the present application.

[0042] Description of the numbers in the figure:

[0043] 1. Positioning plate; 11. Slide groove; 12. Mounting cavity; 2. Positioning frame; 3. Driving unit; 31. Driving gear; 32. Rack; 321. Limiting hole; 33. Driving shaft; 4. Follow-up limiting unit; 41. Limiting rod; 42. Paddle; 43. Fan-shaped pressure piece; 44. Limiting spring; 5. Transmission member; 6. Driving motor; 100. Bearing ring. DETAILED DESCRIPTION

[0044] An implementation method of the present application is described in detail below with reference to the accompanying drawings.

[0045] The first implementation method:

[0046] The present invention provides a positioning mechanism for bearing processing, see Figure 1-Figure 3 , comprising a positioning plate 1 mounted on a fixed base, the positioning plate 1 is provided with a plurality of slide grooves 11 extending radially along the positioning plate 1, and a positioning frame 2 is slidably connected in each of the plurality of slide grooves 11;

[0047] The positioning frame 2 is a U-shaped frame, and the two ends of the positioning frame 2 are close to each other and extend a certain distance;

[0048] A driving assembly is installed in the positioning plate 1 to drive the positioning frame 2 to slide along the slide groove 11;

[0049] First, the driving component drives at least two symmetrically arranged positioning frames 2 to move in opposite directions. When the at least two symmetrically arranged positioning frames 2 are in different clamping states from the other positioning frames 2, the driving component drives the other at least two symmetrically arranged positioning frames 2 to move in opposite directions again, and finally the clamping states of the two positioning frames 2 moving in the rear are consistent with those of the two positioning frames 2 moving in the front.

[0050] The clamping state includes clamping the outer wall of the bearing ring 100 and clamping the inner wall of the bearing ring 100;

[0051] A limiting mechanism for adjusting the position of the positioning frame 2 is also installed in the positioning plate 1, and the limiting mechanism is linked with the driving component.

[0052] Based on the above structure, the driving component is first used to drive at least two symmetrically arranged positioning frames 2 to move in opposite directions. When the at least two symmetrically arranged positioning frames 2 are in different clamping states from the other positioning frames 2, the driving component drives at least two other symmetrically arranged positioning frames 2 to move in opposite directions again, and finally the clamping states of the two positioning frames 2 moving in the rear are consistent with the clamping states of the two positioning frames 2 moving in the front, thereby gradually changing the clamping state of the positioning frames 2 on the bearing ring 100, from clamping the outer ring of the bearing ring 100 to clamping the inner ring of the bearing ring 100 (or from the inner ring to the outer ring), thereby achieving the change of the clamping state under the premise of ensuring clamping, so that the outer ring or the inner ring of the bearing ring 100 is fully polished in turn, so as to achieve a completely dead angle-free polishing effect, and there is no need to perform secondary clamping on the bearing ring 100 after removing it, and the axial position and radial position of the bearing ring 100 will not be changed during the polishing process, thereby ensuring the effectiveness of polishing and improving the polishing quality;

[0053] At the same time, the limiting mechanism can perform adjustable limiting on the positioning frame 2, thereby achieving the effect of limiting or contact limiting the positioning frame 2, so as to better cooperate with the driving component to realize the change of the moving or fixed state of the positioning frame 2.

[0054] Figure 2-Figure 4 The driving assembly is shown to include a plurality of driving units 3, a transmission member 5 and a driving motor 6. The driving motor 6 is fixed to the rear side of the positioning plate 1. The number of driving units 3 corresponds to the number of positioning frames 2 and the plurality of driving units 3 corresponds one to one to the plurality of positioning frames 2. A plurality of transmission members 5 are provided and used for transmitting between the driving motor 6 and the plurality of driving units 3, so that the plurality of driving units 3 rotate synchronously in the same direction.

[0055] The plurality of drive units 3 have the same structure but are arranged in different ways. The plurality of drive units 3 can asynchronously drive the plurality of positioning frames 2 to change the clamping state through different arrangements.

[0056] The driving unit 3 includes a driving gear 31, a rack 32 and a driving shaft 33. The driving gear 31 is fixed to the driving shaft 33. The driving shaft 33 is rotatably connected to the positioning plate 1. The rack 32 is fixed to the rear side of the positioning frame 2 and meshes with the driving gear 31. The teeth on the driving gear 31 are distributed in a fan shape and the angle is not greater than 90°.

[0057] Two driving units 3 corresponding to two positioning frames 2 symmetrically distributed along the axis of the positioning plate 1 are arranged in mirror image;

[0058] The other two drive units 3 corresponding to the other two positioning frames 2 arranged at an angle of 90° with the two positioning frames 2 have teeth distribution directions opposite to those of the drive gears 31 of the two aforementioned drive units 3; Figure 4 The structure shown.

[0059] Through the arrangement of the driving unit 3, the transmission member 5 and the driving motor 6, the driving motor 6 drives the plurality of driving shafts 33 to rotate synchronously in the same direction through the transmission member 5. Since the two driving units 3 corresponding to the two positioning frames 2 symmetrically distributed along the axis of the positioning plate 1 are arranged in a mirror image, and the other two driving units 3 corresponding to the other two positioning frames 2 arranged at an angle of 90° to the two positioning frames 2 have teeth distribution directions opposite to those of the driving gears 31 of the aforementioned two driving units 3, the plurality of driving shafts 33 drive the plurality of driving gears 31 to rotate synchronously in the same direction when rotating. When the plurality of driving gears 31 rotate synchronously in the same direction, The four driving gears 31 forming a 90° angle are opposite to each other and drive two symmetrical positioning frames 2 to move toward the axis of the positioning disk 1 or toward the outside of the positioning disk 1 at the same time. The four positioning frames 2 are divided into two groups opposite to each other, and the movement of the two groups of positioning frames 2 is separated front and back, so as to achieve the purpose of gradually changing the clamping state of the positioning frame 2 on the bearing ring 100, and realize the effect of changing the clamping point of the bearing ring 100 while ensuring the clamping state of the bearing ring 100, so as to facilitate high-precision grinding and avoid low qualified rate of the finished bearing ring 100 due to changes in the axial position or radial position of the bearing ring 100.

[0060] It should be noted that the number of the positioning frames 2 and the number of the driving units 3 in this embodiment are both at least four, so as to meet the requirement of changing the clamping state of the positioning frame 2 on the bearing ring 100 in stages.

[0061] Figure 6-Figure 8 It is shown that the rear side of the rack 32 has two limiting holes 321 symmetrically arranged along the middle of the rack 32;

[0062] The limiting mechanism is composed of a plurality of follow-up limiting units 4, and the follow-up limiting unit 4 includes:

[0063] A limiting rod 41, one end of which is plugged into and matched with the limiting hole 321;

[0064] The paddle 42 and the fan-shaped pressing piece 43 are fixed to one end of the limiting rod 41 close to the rack 32 and abut against the side of the rack 32 away from the positioning frame 2;

[0065] The fan-shaped pressing piece 43 is fixedly sleeved on the driving shaft 33. Both sides of the fan-shaped pressing piece 43 are provided with inclined surfaces that meet the paddle 42. When the fan-shaped pressing piece 43 rotates with the driving shaft 33, the inclined surfaces of the fan-shaped pressing piece 43 drive the paddle 42 to move to a side away from the rack 32;

[0066] A limit spring 44, which is sleeved on the limit rod 41 and has one end fixed to the rear side of the paddle 42;

[0067] The positioning plate 1 is provided with a mounting cavity 12 for accommodating the driving unit 3 and the follower limiting unit 4, and the other end of the limiting spring 44 is fixed to the inner wall of the mounting cavity 12;

[0068] One end of the driving shaft 33 and the limiting rod 41 both movably penetrate the rear side of the positioning plate 1 , the limiting rod 41 and the transmission member 5 are staggered in position, and the driving shaft 33 is in transmission connection with the transmission member 5 .

[0069] By means of the arrangement of the limiting rod 41, the paddle 42, the fan-shaped pressure piece 43 and the limiting spring 44, when one of the driving shafts 33 rotates, the corresponding fan-shaped pressure piece 43 is driven to rotate. When the fan-shaped pressure piece 43 rotates to a position where it coincides with the paddle 42, the paddle 42 is first guided by the inclined surface so that the paddle 42 moves to a side away from the rack 32, so that one end of the limiting rod 41 leaves the limiting hole 321 and the limiting spring 44 is compressed at the same time, so that the rack 32 can move under the drive of the driving gear 31. After the rack 32 moves to a predetermined position (i.e., another limiting hole 321 on the rack 32 corresponds to the position of the limiting rod 41, i.e., after the rack 32 is separated from the driving gear 31), the fan-shaped pressing piece 43 continues to rotate a certain angle and separates from the paddle 42, so that the paddle 42 is reset under the elastic force of the limiting spring 44, and drives one end of the limiting rod 41 to be inserted into another limiting hole 321 to limit the rack 32, that is, the position of the positioning frame 2 is fixed, and the bearing ring 100 is stably clamped;

[0070] In this way, the positioning frame 2 can be limited or contact limited as needed, which not only meets the demand for stable clamping of the bearing ring 100, but also meets the demand for automatic release of the limit, and is more practical.

[0071] Figure 3 The transmission member 5 is shown to be a gear set or a transmission pulley set ( Figure 3 The figure shows a gear set, and the tooth block structure of each gear in the gear set is not specifically shown, but it does not affect the understanding based on the existing structure of the gear set, and the transmission pulley set is not shown);

[0072] When the transmission member 5 is a gear set, each drive shaft 33 is fixedly sleeved with a gear, one of which is transmission-connected to the output shaft of the drive motor 6; the distribution and sum of the gear sets meet the need to drive multiple drive shafts 33 to rotate synchronously in the same direction;

[0073] When the transmission member 5 is a transmission pulley group, a transmission wheel is fixedly sleeved on each driving shaft 33, and a transmission belt is sleeved on the transmission wheel between every two adjacent driving shafts 33, and the transmission wheel on one of the driving shafts 33 is transmission-connected to the output shaft of the driving motor 6.

[0074] By setting up the transmission part 5, the transmission requirements can be met, and the effect of using a driving motor 6 to drive multiple positioning frames 2 to move can be achieved, and it can also cooperate well with the driving unit 3 and the follow-up limiting unit 4 to phase-change the clamping state of the positioning frame 2 on the bearing ring 100 and the limiting state of the positioning frame 2 itself.

[0075] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A positioning mechanism for bearing processing, comprising a positioning plate (1) mounted on a fixed base, the positioning plate (1) being provided with a plurality of slide grooves (11) extending radially of the positioning plate (1), a plurality of the slide grooves (11) being slidably connected to positioning frames (2), characterized in that: The positioning frame (2) is a U-shaped frame, and the two ends of the positioning frame (2) are close to each other and extend a certain distance; A driving component is installed in the positioning plate (1) to drive the positioning frame (2) to slide along the slide groove (11); First, the driving component drives at least two symmetrically arranged positioning frames (2) to move in opposite directions. When the at least two symmetrically arranged positioning frames (2) and other positioning frames (2) are in different clamping states, the driving component drives the other at least two symmetrically arranged positioning frames (2) to move in opposite directions again, and finally the clamping states of the two positioning frames (2) moving backward and the two positioning frames (2) moving forward are consistent. The clamping state includes clamping the outer wall of the bearing ring (100) and clamping the inner wall of the bearing ring (100); A limiting mechanism for adjusting the position of the positioning frame (2) is also installed in the positioning plate (1), and the limiting mechanism is arranged in linkage with the driving component; The driving assembly comprises a plurality of driving units (3), a transmission member (5) and a driving motor (6); The driving unit (3) comprises a driving gear (31), a rack (32) and a driving shaft (33); the driving gear (31) is fixed to the driving shaft (33); the driving shaft (33) is rotatably connected to the positioning plate (1); the rack (32) is fixed to the rear side of the positioning frame (2) and meshes with the driving gear (31); the teeth on the driving gear (31) are distributed in a fan shape and the angle is not greater than 90°; The rear side of the rack (32) is provided with two limiting holes (321) symmetrically arranged along the middle of the rack (32); The limiting mechanism is composed of a plurality of follow-up limiting units (4), and the follow-up limiting unit (4) comprises: A limiting rod (41), one end of which is plug-fitted into the limiting hole (321); a paddle (42), the paddle (42) being fixed to an end of the limiting rod (41) close to the rack (32) and abutting against a side of the rack (32) away from the positioning frame (2); A fan-shaped pressing piece (43), the fan-shaped pressing piece (43) is fixedly sleeved on the driving shaft (33), and both sides of the fan-shaped pressing piece (43) are provided with inclined surfaces that cater to the paddle (42), and when the fan-shaped pressing piece (43) rotates with the driving shaft (33), the inclined surfaces of the fan-shaped pressing piece (43) drive the paddle (42) to move to a side away from the rack (32); A limit spring (44), wherein the limit spring (44) is sleeved on the limit rod (41) and one end of the limit spring is fixed to the rear side of the paddle (42); The positioning plate (1) is provided with a mounting cavity (12) for accommodating the driving unit (3) and the follower limiting unit (4), and the other end of the limiting spring (44) is fixed to the inner wall of the mounting cavity (12).

2. A positioning mechanism for bearing processing according to claim 1, characterized in that: The drive motor (6) is fixed to the rear side of the positioning plate (1); the number of the drive units (3) corresponds to the number of the positioning frames (2), and a plurality of the drive units (3) correspond one to one to a plurality of the positioning frames (2); a plurality of the transmission members (5) are provided and are used to transmit between the drive motor (6) and the plurality of drive units (3), so that the plurality of drive units (3) rotate synchronously in the same direction; The plurality of drive units (3) have the same structure but are arranged in different ways; the plurality of drive units (3) are driven asynchronously through different arrangements; and the plurality of positioning frames (2) change the clamping state.

3. A positioning mechanism for bearing processing according to claim 2, characterized in that: Two drive units (3) corresponding to the two positioning frames (2) symmetrically distributed along the axis of the positioning plate (1) are arranged in a mirror image; The other two drive units (3) corresponding to the other two positioning frames (2) arranged at an angle of 90° with the two positioning frames (2) have teeth distribution directions opposite to those of the drive gears (31) of the aforementioned two drive units (3).

4. A positioning mechanism for bearing processing according to claim 3, characterized in that: One end of the driving shaft (33) and the limiting rod (41) are both movably inserted through the rear side of the positioning plate (1); the limiting rod (41) and the transmission member (5) are staggered in position; and the driving shaft (33) and the transmission member (5) are in transmission connection.

5. A positioning mechanism for bearing processing according to claim 4, characterized in that: The transmission member (5) is a gear set or a transmission pulley set.

6. A positioning mechanism for bearing processing according to claim 5, characterized in that: When the transmission member (5) is a gear set, each of the drive shafts (33) is provided with a fixed sleeve with a gear, one of which is in driving connection with the output shaft of the drive motor (6); the distribution and sum of the gear sets meet the need to drive the multiple drive shafts (33) to rotate synchronously in the same direction.

7. A positioning mechanism for bearing processing according to claim 5, characterized in that: When the transmission member (5) is a transmission pulley assembly, a transmission wheel is fixedly sleeved on each of the driving shafts (33), a transmission belt is sleeved on the transmission wheel between every two adjacent driving shafts (33), and the transmission wheel on one of the driving shafts (33) is drivingly connected to the output shaft of the driving motor (6).

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