A device for measuring the inner circle surface of a bearing ring

Abstract

This utility model discloses a bearing race inner roundness measurement device, relating to the field of bearing measurement technology. It includes a base, a worktable mounted on the base, and a support seat on the outside of the worktable. A sleeve is fixed to the top of the support seat, and an instrument mounting bracket is engaged with the outside of the sleeve. It also includes a movable measuring rod and two fixed limiting rods. A Y-shaped groove is formed on the worktable, comprising a first strip groove, a second strip groove, and a third strip groove. The movable measuring rod extends from the base through the third strip groove of the Y-shaped groove from bottom to top. The two fixed limiting rods are slidably connected to the first and second strip grooves, respectively. The movable measuring rod can move radially relative to the base along the third strip groove. This utility model solves the problem that existing bearing testers cannot detect roundness. Compared to roundness testers, it has higher detection efficiency, can detect each bearing race, avoids missed detections, and thus improves product quality.

Description

Technical Field

[0001] This utility model relates to the field of bearing measurement technology, specifically to a device for measuring the inner circle surface degree of bearing rings. Background Technology

[0002] As a precision mechanical component, bearings have very strict requirements for the roundness and facets of their working and assembly surfaces. Their accuracy directly affects the bearing's lifespan and whether the OEM can successfully assemble it. Currently, the main method for inspection is to use a roundness tester for random sampling. However, roundness testers are precision measuring devices with high accuracy but low measurement efficiency. In process control, they can only perform random sampling and cannot control each part, which poses a risk of missed inspections.

[0003] Existing bearing ring measuring instruments, such as the D924 bearing tester, determine whether a product is within acceptable tolerances by reading the deviation range from the swing amplitude of the lever pointer during product rotation. Due to the cross-shaped groove and the distribution of the three measuring points on the end face of the measuring instrument, it can only detect the diameter variation, i.e., ellipticity. The minimum and maximum values ​​of the readings are the values ​​of the ellipticity, and it cannot detect roundness. However, although both bearing roundness and ellipticity are indicators describing the relative roundness error or ellipticity error between the inner ring, outer ring, and rolling elements of a bearing, their meanings and functions are different. Existing bearing ring measuring instruments can only measure ellipticity and cannot measure roundness. Utility Model Content

[0004] The purpose of this invention is to provide a device for measuring the roundness of the inner rim of a bearing ring, which aims to solve the problem of low efficiency in the use of roundness testers in the above-mentioned background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bearing ring inner circle surface measurement device, comprising a base, a worktable mounted on the base, and a support seat mounted on the outside of the worktable. A sleeve is fixed to the top of the support seat, and an instrument fixing frame for fixing a lever is engaged with the outside of the sleeve. The device also includes a movable measuring rod and two fixed limiting rods. A Y-shaped groove is provided on the worktable. The Y-shaped groove includes two symmetrical and inclined slots forming a V-shaped structure: a first slot, a second slot, and a third slot extending vertically downward from the intersection of the first and second slots. The movable measuring rod extends from the base through the third slot of the Y-shaped groove from bottom to top. The two fixed limiting rods are slidably connected to the first and second slots of the Y-shaped groove, respectively. The movable measuring rod can move radially relative to the base along the third slot.

[0006] Furthermore, the movable measuring rod and the fixed limiting rod are respectively provided with radially outward extending locking parts, and each locking part is internally tangent to the raceway of the bearing ring to be tested.

[0007] Furthermore, the locking parts on the movable measuring rod and the fixed limiting rod are arranged in a triangular pattern, and the internal tangent points of each locking part and the bearing raceway are located on the same plane.

[0008] Furthermore, a receiving cavity is provided on the base, and a movable component is provided in the receiving cavity. The movable measuring rod is provided on the movable component. An adjustment block protruding from the outer periphery of the base is also hinged on the base and located below the worktable. The other end of the adjustment block away from the exposed end cooperates with the movable component. A rotatable displacement feedback component is also hinged on the base between the lever end and the movable component. The inner abutment of the displacement feedback component on one side of the hinge abuts against the movable component, and the outer abutment on the other side of the hinge abuts against the lever end.

[0009] Furthermore, an elastic reset component is provided between the displacement feedback component and the base. One end of the elastic reset component is connected to the part between the hinge and the inner abutment of the displacement feedback component, and the other end is connected to the edge of the base receiving cavity.

[0010] This utility model has the following beneficial effects:

[0011] This invention provides a bearing race inner circle prism surface measurement device. It modifies the working surface of existing bearing testing instruments and, through the design of a Y-shaped groove and the distribution of three measuring points, can calculate the roundness of the bearing race inner circle. This solves the problem that existing bearing testing instruments cannot detect roundness. Compared with using a roundness meter, the detection efficiency is higher, and each bearing race can be tested, avoiding the problem of missed detection and thus improving product quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the base in this utility model;

[0014] In the diagram: 1. Base; 2. Workbench; 3. Movable measuring rod; 4. Fixed limit rod; 5. Y-groove; 6. Movable part; 7. Adjusting block; 8. Displacement feedback component; 9. Lever. Detailed Implementation

[0015] like Figures 1 to 2As shown, a bearing ring inner circle surface measurement device includes a base 1, a worktable 2 mounted on the base 1, and a support seat located outside the worktable 2. A sleeve is fixed to the top of the support seat, and an instrument fixing bracket for fixing a lever 9 is engaged with the outside of the sleeve. The device is characterized by further including a movable measuring rod 3 and two fixed limiting rods 4. A Y-shaped groove 5 is formed on the worktable 2. The Y-shaped groove 5 includes two symmetrical and inclined slots forming a V-shaped structure: a first strip slot, a second strip slot, and a groove extending from the first strip slot and the second strip slot. The third strip groove extends vertically downward from the intersection of the strip grooves. The movable measuring rod 3 extends out from the bottom of the base through the third strip groove of the Y-shaped groove 5. The two fixed limiting rods 4 are slidably connected to the first and second strip grooves of the Y-shaped groove 5, respectively. The movable measuring rod 3 can move radially relative to the base 1 along the third strip groove. Based on the principle that three points form a circle, an equilateral triangle is formed. The lever 9 connected to the movable measuring rod 3 moves with the rotation of the collar. The lever 9 reflects the change in the size of the circle determined by the three points.

[0016] The movable measuring rod 3 and the fixed limiting rod 4 are respectively provided with radially outward extending locking parts, and each locking part is internally tangent to the raceway of the bearing ring to be tested.

[0017] The locking parts on the movable measuring rod 3 and the fixed limiting rod 4 are arranged in a triangular pattern, and the internal tangent points of each locking part and the bearing raceway are located on the same plane, which can ensure the detection accuracy.

[0018] A receiving cavity is provided on the base 1, and a movable part 6 is provided in the receiving cavity. The movable measuring rod 3 is provided on the movable part 6. An adjustment block 7 is also hinged on the base 1 and located below the worktable 2, protruding from the outer periphery of the base 1. The other end of the adjustment block 7 away from the exposed end cooperates with the movable part 6. Moving the adjustment block 7 can displace the movable part 6 and drive the movable measuring rod 3 to move radially. A rotatable displacement feedback element 8 is also hinged on the base 1 between the end of the lever instrument 9 and the movable part 6. The inner abutment end of the displacement feedback element 8 located on one side of the hinge abuts against the movable part 6, and the outer abutment end located on the other side of the hinge abuts against the end of the lever instrument 9.

[0019] An elastic reset component is also provided between the displacement feedback component 8 and the base 1. One end of the elastic reset component is connected to the part between the hinge and the inner abutment on the displacement feedback component 8, and the other end is connected to the edge of the base receiving cavity.

[0020] The specific operation process of this utility model is as follows:

[0021] Adjust the positions of the movable measuring rod 3 and the two fixed limiting rods 4 respectively and fix them with nuts so that the outer ring of the bearing to be tested is clamped between the clamping parts of the movable measuring rod 3 and the fixed limiting rods 4. Each clamping part is internally tangent to the raceway of the outer ring of the bearing. The fine adjustment device makes the pointer return to zero for easy reading. At this time, the radial position of the movable measuring rod 3 is the measuring position. The displacement between the measuring position and the reference position is the error value of the raceway dimension of the outer ring of the bearing to be tested. Half of the difference between the maximum and minimum readings of the lever instrument 9 is the roundness of the sample to be tested.

Claims

1. A bearing ring inner circle surface measurement device, comprising a base (1), a worktable (2) disposed on the base (1), and a support seat disposed on the outside of the worktable (2), wherein a sleeve is fixed on the top of the support seat, and an instrument fixing bracket for fixing a lever (9) is engaged on the outside of the sleeve, characterized in that: It also includes a movable measuring rod (3) and two fixed limiting rods (4). The worktable (2) is provided with a Y-shaped groove (5). The Y-shaped groove (5) includes two symmetrical and inclined first strip slots and a second strip slot to form a V-shaped structure, and a third strip slot extending vertically downward from the intersection of the first strip slot and the second strip slot. The movable measuring rod (3) extends out from the base through the third strip slot of the Y-shaped groove (5) from bottom to top. The two fixed limiting rods (4) are slidably connected to the first strip slot and the second strip slot of the Y-shaped groove (5) respectively. The movable measuring rod (3) can move radially relative to the base (1) along the third strip slot.

2. The measuring device according to claim 1, characterized in that, The movable measuring rod (3) and the fixed limiting rod (4) are respectively provided with a locking part that extends radially outward, and each locking part is internally tangent to the raceway of the bearing ring to be tested.

3. The measuring device according to claim 1, characterized in that, The locking parts on the movable measuring rod (3) and the fixed limiting rod (4) are arranged in a triangular pattern, and the internal tangent points of each locking part and the bearing raceway are located on the same plane.

4. The measuring device according to claim 1, characterized in that, A receiving cavity is provided on the base (1), and a movable part (6) is provided in the receiving cavity. The movable measuring rod (3) is provided on the movable part (6). An adjustment block (7) that protrudes from the outer periphery of the base (1) is also hinged on the base (1) and located below the worktable (2). The other end of the adjustment block (7) away from the exposed end cooperates with the movable part (6). A rotatable displacement feedback element (8) is also hinged on the base (1) between the end of the lever (9) and the movable part (6). The inner abutment end of the displacement feedback element (8) located on one side of the hinge abuts against the movable part (6), and the outer abutment end located on the other side of the hinge abuts against the end of the lever (9).

5. The measuring device as described in claim 4, characterized in that, An elastic reset component is also provided between the displacement feedback component (8) and the base (1). One end of the elastic reset component is connected to the part between the hinge and the inner abutment on the displacement feedback component (8), and the other end is connected to the edge of the base receiving cavity.

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