Damage prevention clamp for grinding thin-wall bearing ring

Abstract

The utility model discloses an anti-damage clamp for grinding a thin-wall bearing ring, and relates to the technical field of bearing machining. The bearing clamping device comprises a mounting plate, the mounting plate is mounted on external mobile equipment, two clamping plates are slidably arranged on the inner side of the mounting plate, anti-skid rubber pads are mounted on the inner sides of the clamping plates, the inner sides of the clamping plates are concave, the two clamping plates move in the direction close to each other to clamp a bearing, and a linkage set is mounted on the inner side of the mounting plate. According to the clamping device, the air cylinder drives the rack to linearly advance and synchronously mesh with the missing gears on the two sides to achieve rotary transmission, the first telescopic rod pushes the clamping plates to move oppositely, the anti-skid rubber pads on the inner sides of the concave clamping plates elastically deform when making contact with the thin-wall bearing ring, and concentrated clamping force is evenly dispersed to the contact face of the outer wall of the ring; the four-bar mechanism of the double clamping plates and the second telescopic rod form a redundant stable system, the clamping posture is still kept stable under grinding high-frequency vibration, and it is guaranteed that the ferrule is free of plastic deformation in the whole machining process.

Description

Technical Field

[0001] This utility model belongs to the field of bearing processing technology, and in particular relates to a damage prevention fixture for grinding thin-walled bearing rings. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical bodies, reduce the coefficient of friction during their movement, and ensure their rotational accuracy. When machining bearings, it is generally necessary to grind both the inner and outer rings to ensure their smoothness and thus their accuracy. During grinding, a fixture is also needed to fix the bearing in place to ensure stable grinding.

[0003] A search revealed that patent CN218461773U discloses a bearing grinding fixture. This patent uses a magnetic rotating shaft that can generate magnetism by using electricity to drive an internal electromagnetic coil, thereby causing the magnetic rotating shaft to generate magnetic force, which facilitates the fixing of the bearing. When fixing, the bearing only needs to be sleeved on the outside of the magnetic fixing column. When the grinder grinds the bearing, it is convenient to adjust the position between the magnetic fixing column and the grinder, thus increasing the flexibility of the device.

[0004] The aforementioned patent effectively improves the clamping effect of the device. However, this fixture is difficult to automatically adjust the clamping stroke according to the diameter of the bearing ring. When processing bearing rings of different specifications, the fixture components need to be changed frequently, resulting in low production efficiency. At the same time, the rigid clamping method tends to concentrate the clamping force in a local area. Thin-walled bearing rings are prone to elliptical deformation or plastic damage under radial pressure. Therefore, we provide a damage-resistant fixture for grinding thin-walled bearing rings to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a damage-resistant fixture for grinding thin-walled bearing rings. It uses a cylinder to drive a rack to advance linearly, and synchronously engages the gears on both sides to achieve rotational transmission. The first telescopic rod is precisely controlled to push the clamping plates to move towards each other. The anti-slip rubber pad on the inner side of the concave clamping plate undergoes elastic deformation when it contacts the thin-walled bearing ring, which evenly distributes the concentrated clamping force to the outer wall contact surface of the ring, thereby solving the technical defects in the above-mentioned background art.

[0006] To solve the above technical problems, this utility model is achieved through the following technical solution: This utility model is a damage-resistant fixture for grinding thin-walled bearing rings, including a mounting plate, which is installed on an external mobile device. Two clamping plates are slidably arranged on the inner side of the mounting plate. Anti-slip rubber pads are installed on the inner side of the clamping plates. The inner side of the clamping plates is concave. The two clamping plates move towards each other to clamp the bearing. A linkage assembly is installed on the inner side of the mounting plate.

[0007] The linkage assembly includes two first telescopic rods, one end of which is fixedly provided with a missing gear, and the two missing gears are in a position opposite to each other.

[0008] The present invention is further configured such that a limiting plate is fixedly provided on the top of the mounting plate, a positioning frame is fixedly provided on the bottom of the limiting plate, a cylinder is installed on the inner side of the positioning frame, and the output end of the cylinder extends through to the outer side of the positioning frame.

[0009] The present invention is further configured such that a drive rack is fixedly provided at the output end of the cylinder, the drive rack is located between two missing gears, and both missing gears mesh with the drive rack.

[0010] The present invention is further configured such that a plurality of fixed shafts are fixedly arranged inside the positioning frame, and the missing gear is rotatably engaged with the corresponding fixed shaft.

[0011] The present invention is further configured such that two connecting rods are fixedly provided on the outer side of the clamping plate, the mounting plate and the corresponding connecting rods are slidably engaged, two limiting rods are fixedly provided between the two connecting rods on the same clamping plate, and the other ends of the two first telescopic rods are rotatably engaged with the corresponding limiting rods.

[0012] The present invention is further configured such that a second telescopic rod is rotatably provided on the circumferential side of the other two limiting rods, and the other end of the second telescopic rod is rotatably engaged with the corresponding fixed shaft.

[0013] The present invention is further configured such that a through opening is provided on the surface of the mounting plate, and the through opening is located on one side of the two clamping plates.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model uses a cylinder to drive a rack for linear propulsion, and synchronously engages the gears on both sides to achieve rotational transmission. It precisely controls the first telescopic rod to push the clamping plates to move towards each other. The anti-slip rubber pad on the inner side of the concave clamping plate undergoes elastic deformation when it contacts the thin-walled bearing ring, which evenly distributes the concentrated clamping force to the outer wall contact surface of the ring, eliminating the risk of local indentation. The four-bar linkage mechanism of the double clamping plates and the second telescopic rod form a redundant and stable system, which maintains the stability of the clamping posture under the high-frequency vibration of grinding, ensuring that the ring does not undergo plastic deformation throughout the entire processing.

[0016] 2. This utility model uses a half-tooth structure with missing gears to convert the cylinder stroke into a rotational motion with a limited angle, so that the opening and closing stroke of the clamping plate automatically adapts to different diameter rings, drives the rack to mesh with the double missing gears, and with the hinge adaptive design of the telescopic rod, the displacement of the two clamping plates is synchronized and the accuracy is stable, avoiding the elliptical deformation of thin-walled parts caused by clamping misalignment. The through-hole provides unobstructed processing space for grinding tools. Combined with the vibration suppression capability of the fixture, the roundness error of the ring is reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a damage prevention fixture for grinding thin-walled bearing rings.

[0019] Figure 2 for Figure 1 Another structural diagram from a different angle.

[0020] Figure 3 for Figure 2 The structural bottom view.

[0021] Figure 4 for Figure 2 The left view of the structure.

[0022] Figure 5 This is a schematic diagram of the positioning frame in this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Mounting plate, 2-Clamping plate, 3-First telescopic rod, 4-Missing gear, 5-Limiting plate, 6-Positioning frame, 7-Cylinder, 8-Drive rack, 9-Fixed shaft, 10-Connecting rod, 11-Second telescopic rod, 12-Through hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5This utility model is a damage-resistant fixture for grinding thin-walled bearing rings, including a mounting plate 1, which is installed on an external mobile device. The mounting plate 1 serves as the main support platform of the fixture and achieves precise multi-station positioning of the workpiece through the external mobile device. Two clamping plates 2 are slidably arranged on the inner side of the mounting plate 1. Anti-slip rubber pads are installed on the inner side of the clamping plates 2. The inner side of the clamping plates 2 is concave. The two clamping plates 2 move towards each other to clamp the bearing. A linkage assembly is installed on the inner side of the mounting plate 1. The concave curved surface structure precisely matches the outer contour of the bearing ring, increasing the contact area. The anti-slip rubber pads absorb local stress through elastic deformation, reducing the clamping pressure.

[0027] The linkage assembly includes two first telescopic rods 3. One end of each first telescopic rod 3 is fixedly equipped with a missing gear 4. The two missing gears 4 are positioned opposite each other. The half-tooth structure limits the rotation angle to within 90°, ensuring that the clamping plate stroke and the diameter of the collar are precisely matched. The symmetrical layout enables bidirectional synchronous motion, converting the rotational motion of the missing gear into linear thrust, improving transmission efficiency. The telescopic structure adapts to collars of different diameters.

[0028] Specifically, a limit plate 5 is fixedly installed on the top of the mounting plate 1, and a positioning frame 6 is fixedly installed at the bottom of the limit plate 5. A cylinder 7 is installed inside the positioning frame 6, and the output end of the cylinder 7 extends through to the outside of the positioning frame 6. A drive rack 8 is fixedly installed at the output end of the cylinder 7. The drive rack 8 is located between two missing gears 4, and both missing gears 4 mesh with the drive rack 8.

[0029] Furthermore, several fixed shafts 9 are fixedly installed on the inner side of the positioning frame 6, and the gear 4 rotates with the corresponding fixed shaft 9.

[0030] Two connecting rods 10 are fixedly installed on the outer side of the clamping plate 2. The mounting plate 1 and the corresponding connecting rod 10 are slidably engaged. Two limiting rods are fixedly installed between the two connecting rods 10 on the same clamping plate 2. The other ends of the two first telescopic rods 3 are rotatably engaged with the corresponding limiting rods. The double connecting rods 10 and the corresponding limiting rods form a four-bar linkage stabilization system to prevent radial deformation when the thin-walled parts are clamped.

[0031] Furthermore, the other two limiting rods are rotatably equipped with second telescopic rods 11 on their circumferential sides. The other end of the second telescopic rod 11 is rotatably engaged with the corresponding fixed shaft 9. The second telescopic rod 11 and the first telescopic rod 3 form a redundant stabilizing mechanism to suppress the micro-displacement of the clamping plate 2 caused by grinding vibration. The hinge design eliminates lateral force and reduces the wear rate. The surface of the mounting plate 1 is provided with a through-hole 12, which is located on one side of the two clamping plates 2. The through-hole 12 is designed to provide a non-interference processing channel for the grinding tool, ensuring that the entire circumference of the ring can be processed.

[0032] The working principle of this utility model is as follows: the output end of the cylinder 7 pushes the drive rack 8 to move in a straight line. The drive rack 8 simultaneously meshes with two missing gears 4. Since the missing gears 4 only have partial tooth structure, the linear motion of the drive rack 8 is converted into a specific angle rotation of the missing gears 4. The rotation of the missing gears 4 drives the first telescopic rod 3, which is fixedly connected to it, to move. The other end of the first telescopic rod 3 rotates and engages with the limiting rod on the clamping plate 2, thereby converting the rotational motion into the translational driving force of the clamping plate 2.

[0033] Two first telescopic rods 3 push the limiting rods on the corresponding clamping plates 2 respectively, so that the two clamping plates 2 slide synchronously towards each other on the inner side of the mounting plate 1 through the connecting rod 10, thereby clamping the bearing. One end of the second telescopic rod 11 is connected to the limiting rod of the clamping plate 2, and the other end is rotatably engaged with the fixed shaft 9 of the positioning frame 6. When the clamping plate 2 moves, the second telescopic rod 11 extends and retracts and adjusts the angle to enhance the stability of the movement of the clamping plate 2 and prevent deflection. The concave structure on the inner side of the clamping plate 2, together with the anti-slip rubber pad, evenly wraps the outer wall of the thin-walled bearing ring when moving towards each other. The clamping force is dispersed through soft contact and surface support to avoid workpiece deformation or surface damage. The through-hole 12 is located on one side of the clamping plate 2 to provide operating space for the grinding tool and ensure that the fixture does not interfere with the grinding path during processing.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A damage-resistant fixture for grinding thin-walled bearing rings, comprising a mounting plate (1), characterized in that: The mounting plate (1) is installed on an external mobile device. Two clamping plates (2) are slidably arranged on the inner side of the mounting plate (1). Anti-slip rubber pads are installed on the inner side of the clamping plates (2). The inner side of the clamping plates (2) is concave. The two clamping plates (2) move towards each other to clamp the bearing. A linkage assembly is installed on the inner side of the mounting plate (1). The linkage group includes two first telescopic rods (3), one end of which is fixedly provided with a missing gear (4), and the two missing gears (4) are in a position opposite to each other.

2. The anti-damage fixture for grinding thin-walled bearing rings according to claim 1, characterized in that, A limiting plate (5) is fixedly installed on the top of the mounting plate (1), and a positioning frame (6) is fixedly installed at the bottom of the limiting plate (5). A cylinder (7) is installed inside the positioning frame (6), and the output end of the cylinder (7) extends through to the outside of the positioning frame (6).

3. The anti-damage fixture for grinding thin-walled bearing rings according to claim 2, characterized in that, The cylinder (7) has a fixed drive rack (8) at its output end. The drive rack (8) is located between two missing gears (4), and both missing gears (4) mesh with the drive rack (8).

4. The anti-damage fixture for grinding thin-walled bearing rings according to claim 3, characterized in that, The positioning frame (6) has several fixed shafts (9) fixedly installed on its inner side, and the missing gear (4) rotates with the corresponding fixed shaft (9).

5. The anti-damage fixture for grinding thin-walled bearing rings according to claim 4, characterized in that, Two connecting rods (10) are fixedly installed on the outside of the clamping plate (2). The mounting plate (1) and the corresponding connecting rod (10) are slidably engaged. Two limiting rods are fixedly installed between the two connecting rods (10) on the same clamping plate (2). The other end of the two first telescopic rods (3) is rotatably engaged with the corresponding limiting rod.

6. The anti-damage fixture for grinding thin-walled bearing rings according to claim 5, characterized in that, The other two limiting rods are rotatably provided with second telescopic rods (11) on their peripheral sides, and the other end of the second telescopic rods (11) is rotatably engaged with the corresponding fixed shaft (9).

7. A damage-resistant fixture for grinding thin-walled bearing rings according to claim 6, characterized in that, The mounting plate (1) has a through opening (12) on its surface, and the through opening (12) is located on one side of the two clamping plates (2).

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