A full complement ball bearing diagonal play detection tool

Abstract

The application relates to the field of clearance detection, in particular to a full ball bearing diagonal clearance detection tool, which comprises a base, a supporting assembly and a mandrel, the supporting assembly is connected to the base, the supporting assembly can clamp a bearing outer ring to form a limit, the mandrel comprises a measuring part, a force applying part, a limit ring one and a limit ring two, one end of the force applying part can pass through an inner ring and is threadedly connected to an end face of the measuring part, the other end of the force applying part is used for applying a load, the limit ring one is coaxially connected to an outer circumferential surface of the measuring part close to the force applying part, the limit ring two is coaxially connected to an outer circumferential surface of the force applying part, and a limit gap for embedding the inner ring is left between the end faces of the limit ring one and the limit ring two which are opposite to each other. In the application, the measuring part, the force applying part, the limit ring one and the limit ring two are arranged, the inner ring is fixed on the mandrel, the inner ring is pressed tightly and cannot move on the bearing, and twice measurement values are the diagonal clearance of the measured bearing, so that the diagonal clearance detection precision of the full ball bearing is improved.

Description

Technical Field

[0001] This application relates to the field of clearance testing, and in particular to a tooling for testing the diagonal clearance of a full complement ball bearing. Background Technology

[0002] Bearing clearance refers to the gap between the rolling elements and the raceways of the inner and outer rings when the bearing is not installed or under load. It is used to assess the bearing's assembly quality, operating condition, and life potential. When testing the diagonal clearance of a full complement ball bearing, the bearing is placed horizontally to fix the outer ring. A stress-free shaft is passed through the inner ring, with both sides of the stress-free shaft equidistant. A measuring instrument is placed on one side of the stress-free shaft, and a load force perpendicular to the axis is slowly applied to the other side of the stress-free shaft. The measurement value of the measuring instrument is recorded at this time. The load force is applied in the opposite direction, and the measurement value of the measuring instrument is recorded again. The two readings are the diagonal clearance of the bearing.

[0003] However, during the measurement of the diagonal clearance of a fully loaded ball bearing, the lack of a locking device on the inner ring of the stress-free shaft causes the inner ring to move within the bearing, thus reducing the accuracy of the diagonal clearance measurement for a fully loaded ball bearing. Utility Model Content

[0004] To improve the accuracy of detecting the diagonal clearance of a full complement ball bearing, this application provides a tooling for detecting the diagonal clearance of a full complement ball bearing.

[0005] This application provides a fixture for detecting the diagonal clearance of a full complement ball bearing, which adopts the following technical solution: A fixture for detecting the diagonal clearance of a full complement ball bearing includes a base, a support assembly, and a mandrel. The support assembly is connected to the base and can clamp the outer ring of the bearing to form a limit. The mandrel includes a measuring part, a force-applying part, a first limiting ring, and a second limiting ring. One end of the force-applying part can pass through the inner ring and is threaded to the end face of the measuring part. The other end of the force-applying part is used to apply load force. The end of the measuring part away from the force-applying part is used for the detection contact of a measuring instrument. The second limiting ring is coaxially connected to the outer peripheral surface of the measuring part near the force-applying part. The third limiting ring is coaxially connected to the outer peripheral surface of the force-applying part. A limiting gap is left between the opposite end faces of the first and second limiting rings for the inner ring to be embedded.

[0006] By adopting the above technical solution, when performing diagonal clearance testing on a fully loaded ball bearing, the threaded end of the force-applying part is fitted with the inner ring and screwed tightly onto the end face of the measuring part, thus assembling the force-applying part and the measuring part. Simultaneously, the limiting gap is located between the opposing end faces of limiting ring one and limiting ring two, securing the inner ring on the mandrel and preventing it from shifting within the bearing. The outer ring is placed on the support assembly, which clamps the bearing outer ring to form a limiting position. A load is applied to the end of the force-applying part, and the measuring instrument's detection contact abuts against the end of the measuring part. The measuring instrument measures the position and records the measured value. A reverse load is then applied to the force-applying part, and the measured value is recorded. The two measured values ​​constitute the diagonal clearance of the bearing under test, thereby improving the accuracy of diagonal clearance testing on a fully loaded ball bearing.

[0007] Optionally, the mandrel further includes a washer, which is sleeved on the outer peripheral surface of the force-applying part near the measuring part. The washer is located within the limiting gap, and the inner ring end face and one end face of the limiting ring clamp the two sides of the washer to form a limiting position.

[0008] By adopting the above technical solution, when the inner ring and washer are threaded through one end of the force-applying part and tightened onto the end face of the measuring part, both the inner ring and the washer are embedded in the limiting gap. One end of the inner ring along the axial direction abuts against the two end faces of the limiting ring, and the other end of the inner ring along the axial direction and one end face of the limiting ring clamp the two sides of the washer to form a limit, so that the inner ring is not easy to shift within the limiting gap, thus achieving the fixation of the inner ring on the mandrel. When the length of the inner ring along the axial direction changes, only the number of washers needs to be adjusted to achieve the fixation of bearings of different lengths on the mandrel, thereby improving the versatility of the diagonal clearance detection fixture.

[0009] Optionally, the support assembly includes a support base connected to the surface of the base. The surface of the support base has a positioning cavity for the bearing to be embedded. The inner wall of the positioning cavity abuts against the outer ring of the bearing to form a limit. The bottom wall of the positioning cavity has a coaxial clearance cavity for the measuring part to pass through.

[0010] By adopting the above technical solution, when the end of the force-applying part is threaded and fixed to the end face of the measuring part, the end of the measuring part away from the limiting ring passes through the positioning cavity and the clearance cavity in sequence and abuts against the detection contact of the measuring instrument. At the same time, the bearing is embedded in the positioning cavity, and the outer ring of the bearing abuts against the inside of the positioning cavity to form a limit, making it difficult for the outer ring to shift, thereby further improving the detection accuracy of the diagonal clearance of the fully loaded ball bearing.

[0011] Optionally, the support assembly further includes a pressure cap, and the inner wall of the positioning cavity is coaxially provided with a clamping cavity for the pressure cap to be inserted. The outer peripheral surface of the pressure cap abuts against the inner wall of the clamping cavity to form a limit, and the end face of the pressure cap and the inner wall of the positioning cavity clamp the two ends of the outer ring axis to form a limit.

[0012] By adopting the above technical solution, when the bearing is embedded in the positioning cavity, the gland is embedded in the clamping cavity, and the outer circumferential surface of the gland abuts against the inner wall of the clamping cavity to form a limit. The end face of the gland and the inner wall of the positioning cavity clamp the two ends of the outer ring axis to form a limit, making it difficult for the bearing to shift in the inner wall of the positioning cavity, thereby improving the positioning stability of the bearing in the positioning cavity.

[0013] Optionally, the outer peripheral surface of the pressure cap is threaded and fixed to the inner wall of the clamping cavity to form a limit.

[0014] By adopting the above technical solution, when the bearing is embedded in the positioning cavity, the gland is screwed into the inner wall of the cavity. The end face of the gland and the bottom wall of the positioning cavity clamp the two ends of the outer ring axis to form a limit, making it difficult for the gland to be squeezed out of the cavity, thereby increasing the clamping force of the end face of the gland and the bottom wall of the positioning cavity on the two ends of the bearing.

[0015] Optionally, the end face of the pressure cap protruding from the support seat is provided with multiple force-applying grooves spaced apart.

[0016] By adopting the above technical solution, multiple force-applying grooves are distributed at intervals on the end face of the gland protruding from the support seat. The inner wall of the force-applying grooves provides a force-applying point for the user to screw the gland, thereby facilitating the screwing and fixing of the gland to the inner wall of the clamping cavity, and further improving the ease of use of the clearance detection tool.

[0017] Optionally, the support assembly further includes a support bolt, the end of which passes through the base and is threaded and fixed to the bottom surface of the support base to form a limit.

[0018] By adopting the above technical solution, the end of the support bolt passes through the surface of the base and is threaded and fixed to the bottom surface of the support seat to form a limit, thereby realizing the detachable connection between the support seat and the base, which facilitates the replacement of the support seat.

[0019] Optionally, the end face of the force-applying part away from the measuring part is provided with a force-applying hole, and the axis of the force-applying hole is perpendicular to the axis of the force-applying part.

[0020] By adopting the above technical solution, the axis of the force-applying hole and the axis of the force-applying part are perpendicular to each other, and the inner wall of the force-applying hole provides a force-applying point for the load force, thereby facilitating the control of the magnitude and direction of the force applied to the force-applying part, and further improving the detection accuracy of the diagonal clearance of the full complement ball bearing.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The setting of the measuring part, the force application part, the limiting ring one and the limiting ring two realizes the fixation of the inner ring on the mandrel, so that the inner ring is pressed tightly and will not move on the bearing. The two measurement values ​​are the diagonal clearance of the bearing under test, thereby improving the detection accuracy of the diagonal clearance of the fully loaded ball bearing. 2. The support seat is designed so that the outer ring of the bearing is pressed against the inside of the positioning cavity to form a limit, making it less likely for the outer ring to shift, and further improving the accuracy of detecting the diagonal clearance of a fully loaded ball bearing; 3. The setting of the gland and the clamping cavity, the end face of the gland and the inner wall of the positioning cavity clamp the two ends of the outer ring axis to form a limit, so that the bearing is not easy to shift in the inner wall of the positioning cavity, thereby improving the positioning stability of the bearing in the positioning cavity. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0023] Figure 2 This is a partial cross-sectional view of an embodiment of this application, mainly showing the support bolts.

[0024] Explanation of reference numerals in the attached drawings: 1. Base; 11. Mounting cavity; 12. Threaded groove one; 2. Support assembly; 21. Support seat; 211. Threaded groove two; 212. Positioning cavity; 213. Clearance cavity; 214. Clamping cavity; 22. Pressure cap; 221. Force application groove; 23. Support bolt; 3. Mandrel; 31. Measuring part; 311. Threaded hole; 32. Force application part; 321. Limiting gap; 322. Force application hole; 33. Limiting ring one; 34. Limiting ring two; 35. Washer; 4. Bearing. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] This application discloses a fixture for detecting the diagonal clearance of a full complement ball bearing. (Refer to...) Figure 1 and Figure 2 A fixture for detecting the diagonal clearance of a full complement ball bearing includes a base 1, a support assembly 2, and a mandrel 3. The bottom surface of the base 1 abuts against the ground to form a support. The support assembly 2 is installed on the top surface of the base 1 and can clamp the outer ring of the bearing 4 to form a limit. The mandrel 3 includes a measuring part 31, a force-applying part 32, a first limit ring 33, a second limit ring 34, and a washer 35. In this embodiment, both the force-applying part 32 and the measuring part 31 are cylindrical. One end of the measuring part 31 along the axial direction is abutted by a measuring instrument's detection contact, and the other end of the measuring part 31 is coaxially open. The force-applying part 32 is provided with a threaded hole 311 for threaded tightening of the end of the force-applying part 32. In this embodiment, the measuring instrument is a dial indicator. One end of the force-applying part 32 is threaded and fixed to the inner wall of the threaded hole 311. The other end of the force-applying part 32 is provided with a force-applying hole 322 for applying load force. The axis of the force-applying hole 322 is perpendicular to the axis of the force-applying part 32. The force-applying hole 322 passes through both sides of the force-applying part 32 along its own axis. In this embodiment, the load force on the force-applying part 32 is connected to the counterweight through a fixed pulley, and the weight of the counterweight is 10 Newtons.

[0027] Reference Figure 1 and Figure 2 The inner ring wall of the first limiting ring 33 is coaxially connected to the outer circumferential surface of the measuring part 31 near the threaded hole 311. The inner ring wall of the second limiting ring 34 is coaxially fixed to the outer circumferential surface of the force-applying part 32. A limiting gap 321 is left between the end faces of the first limiting ring 33 and the second limiting ring 34 for the inner ring and washer 35 to be inserted. The inner diameter of the washer 35 is equal to the diameter of the force-applying part 32 and the inner diameter of the inner ring of the bearing 4. The washer 35 is located on the side of the bearing 4 facing the first limiting ring 33. When the inner ring and washer 35 are sequentially inserted into the end of the force-applying part 32... 5. When the inner ring of the bearing 4 is tightened and fixed to the inner wall of the threaded hole 311, one end of the bearing 4 inner ring along the axial direction abuts against the end face of the second limiting ring 34. The other end of the bearing 4 inner ring along the axial direction and the end face of the first limiting ring 33 clamp the two sides of the washer 35 along the axial direction to form a limit, so that the inner ring of the bearing 4 is pressed and will not move on the outer ring of the bearing 4, thus realizing the limit of the inner ring of the bearing 4 on the force application part 32. The distance from the force application hole 322 to the bearing 4 is equal to the distance from the measuring instrument to the bearing 4. In this embodiment, the distance is 10 cm.

[0028] Reference Figure 1 and Figure 2 The support assembly 2 includes a support base 21, a pressure cap 22, and support bolts 23. The number of support bolts 23 can be one, two, or more. In this embodiment, the number of support bolts 23 is two. The bottom surface of the base 1 has an installation cavity 11. The inner wall of the installation cavity 11 has multiple threaded grooves 12 for the ends of the support bolts 23 to pass through. The axis of the threaded grooves 12 is parallel to the height direction of the base 1. The threaded grooves 12 pass through both sides of the height direction of the base 1 along their own axis. The bottom of the support base 21 has multiple threaded grooves 211 for the ends of the support bolts 23 to be embedded. The ends of the support bolts 23 pass through the threaded grooves 12 and are threaded and fixed to the inner wall of the threaded grooves 211 to form a fixed structure, thereby realizing the detachable installation of the support base 21 and the base 1.

[0029] Reference Figure 1 and Figure 2 The support base 21 has a positioning cavity 212 for the bearing 4 to be embedded in. The axis of the positioning cavity 212 is parallel to the length direction of the base 1. The inner wall of the positioning cavity 212 can abut against the outer circumferential surface of the outer ring of the bearing 4 to form a limit. The bottom wall of the positioning cavity 212 has a relief cavity 213 for the measuring part 31 to pass through. The inner diameter of the relief cavity 213 is larger than the diameter of the measuring part 31 and smaller than the inner diameter of the outer ring of the bearing 4. The opening of the positioning cavity 212 has a pressing cavity 214 for the end of the pressure cap 22 to be embedded in. The inner wall of the pressing cavity 214 has an internal thread, and the outer circumferential surface of the pressure cap 22 has an external thread. The end of the pressure cap 22 with the external thread is screwed and fixed to the inner wall of the pressing cavity 214. The end face of the pressure cap 22 and the bottom wall of the positioning cavity 212 clamp the two ends of the outer ring of the bearing 4 in the axial direction to form a limit.

[0030] Reference Figure 1 and Figure 2 The end face of the pressure cap 22 protruding from the support base 21 is provided with multiple force-applying grooves 221 spaced apart. The multiple force-applying grooves 221 are evenly distributed around the axis of the pressure cap 22. The inner wall of the force-applying grooves 221 provides a force-applying point for screwing the pressure cap 22. In this embodiment, the pressure cap 22 is a ring. The inner ring of the pressure cap 22 is for the force-applying part 32 to pass through. The outer diameter of the pressure cap 22 is equal to the outer diameter of the outer ring of the bearing 4, and the inner diameter of the pressure cap 22 is larger than the inner diameter of the inner ring of the bearing 4. When the end of the measuring part 31 passes through the positioning cavity 212 and the clearance cavity 213 in sequence and abuts against the detection contact of the measuring instrument, the bearing 4 is embedded in the positioning cavity 212. The pressure reducing cover 22 is screwed into the inner wall of the pressure groove 221 and embedded into the inner wall of the clamping cavity 214. The end face of the pressure cover 22 and the bottom wall of the positioning cavity 212 clamp the two ends of the outer ring axis of the bearing 4 to form a limit, so that the bearing 4 is not easy to shift in the positioning cavity 212, thereby improving the limiting stability of the bearing 4 in the positioning cavity 212. At the same time, the end of the force application part 32 away from the measuring part 31 is connected to a 10 Newton load block through a fixed pulley, and the measurement value of the measuring instrument is recorded. The 10 Newton load block is applied in the opposite direction, and the measurement value of the measuring instrument is recorded again. The two readings are the diagonal clearance of the bearing 4.

[0031] The implementation principle of the full complement ball bearing diagonal clearance detection fixture in this application embodiment is as follows: When the full complement ball bearing 4 is loaded for diagonal clearance detection, the end of the force application part 32 is sequentially fitted with an inner ring and a washer 35 and screwed tightly onto the inner wall of the threaded hole 311. One end of the inner ring of the bearing 4 in the axial direction abuts against the end face of the second limiting ring 34, and the other end of the inner ring of the bearing 4 and the end face of the first limiting ring 33 clamp the two sides of the washer 35 in the axial direction to form a limit, so that the inner ring of the bearing 4 is pressed tightly and will not move on the outer ring of the bearing 4, thus realizing the limit of the inner ring of the bearing 4 on the force application part 32. The end of the measuring part 31 sequentially fits into the positioning cavity 212 and the clearance cavity 213 and abuts against the detection contact of the measuring instrument. The bearing 4 is embedded in the positioning cavity 212. The pressure reducing cover 22 is screwed into the inner wall of the clamping cavity 214 through the inner wall of the force application groove 221. The end face of the pressure cover 22 and the bottom wall of the positioning cavity 212 clamp the two ends of the outer ring axis of the bearing 4 to form a limit, so that the bearing 4 is not easy to shift in the positioning cavity 212, thereby improving the limiting stability of the bearing 4 in the positioning cavity 212. At the same time, the end of the force application part 32 away from the measuring part 31 is connected to a 10 Newton load block through a fixed pulley. The measurement value of the measuring instrument is recorded. The 10 Newton load block is applied in the opposite direction, and the measurement value of the measuring instrument is recorded again. The two readings are the diagonal clearance of the bearing 4, thereby improving the detection accuracy of the diagonal clearance of the fully loaded ball bearing 4.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fixture for detecting the diagonal clearance of a full complement ball bearing, characterized in that: The device includes a base (1), a support assembly (2), and a spindle (3). The support assembly (2) is connected to the base (1) and can clamp the outer ring of the bearing (4) to form a limit. The spindle (3) includes a measuring part (31), a force-applying part (32), a first limiting ring (33), and a second limiting ring (34). One end of the force-applying part (32) can pass through the inner ring and be threaded to the end face of the measuring part (31). The other end is used for applying load force. The end of the measuring part (31) away from the force-applying part (32) is used for the detection contact of the measuring instrument. The first limiting ring (33) is coaxially connected to the outer peripheral surface of the measuring part (31) near the force-applying part (32). The second limiting ring (34) is coaxially connected to the outer peripheral surface of the force-applying part (32). A limiting gap (321) is left between the end faces of the first limiting ring (33) and the second limiting ring (34) for the inner ring to be inserted.

2. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 1, characterized in that: The mandrel (3) also includes a washer (35), which is sleeved on the outer peripheral surface of the force application part (32) near the measuring part (31). The washer (35) is located in the limiting gap (321), and the inner ring end face and the limiting ring one (33) end face clamp the two sides of the washer (35) to form a limit.

3. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 2, characterized in that: The support assembly (2) includes a support base (21), which is connected to the surface of the base (1). The surface of the support base (21) is provided with a positioning cavity (212) for the bearing (4) to be embedded. The inner wall of the positioning cavity (212) abuts against the outer ring of the bearing (4) to form a limit. The bottom wall of the positioning cavity (212) is coaxially provided with a clearance cavity (213) for the measuring part (31) to pass through.

4. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 3, characterized in that: The support assembly (2) also includes a pressure cap (22). The inner wall of the positioning cavity (212) is coaxially provided with a pressing cavity (214) for the pressure cap (22) to be inserted. The outer peripheral surface of the pressure cap (22) abuts against the inner wall of the pressing cavity (214) to form a limit. The end face of the pressure cap (22) and the inner wall of the positioning cavity (212) clamp the two ends of the outer ring axis direction to form a limit.

5. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 4, characterized in that: The outer circumferential surface of the pressure cap (22) is threaded and fixed to the inner wall of the clamping cavity (214) to form a limit.

6. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 5, characterized in that: The end face of the pressure cap (22) protruding from the support base (21) is provided with a plurality of force-applying grooves (221) spaced apart.

7. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 3, characterized in that: The support assembly (2) also includes a support bolt (23), the end of which passes through the base (1) and is threaded and fixed to the bottom surface of the support base (21) to form a limit.

8. The fixture for detecting diagonal clearance of a full complement ball bearing according to claim 1, characterized in that: The end face of the force-applying part (32) away from the measuring part (31) is provided with a force-applying hole (322), and the axis of the force-applying hole (322) is perpendicular to the axis of the force-applying part (32).

Images