Bearing starting torque measuring device

Abstract

The utility model relates to a bearing starting torque measuring device, which is applied to the field of bearings, and comprises a testing seat, a positioning groove matched with a finished bearing is formed in the testing seat, a supporting groove matched with a bearing outer ring is formed in the groove wall of the positioning groove, the bearing outer ring is erected on the supporting groove, and a bearing inner ring is partially suspended and arranged in the positioning groove in a penetrating manner; the auxiliary block is connected with the bearing inner ring through a first connecting assembly, and a second connecting assembly used for being connected with a testing device is arranged on the auxiliary block. The testing device has the technical effects that the testing device drives the auxiliary block to rotate so as to enable the bearing inner ring to rotate stably, and a numerical value displayed on the testing device is the starting torque of the crossed roller bearing. The supporting groove plays a role in supporting the finished bearing, and the outer ring of the bearing is stably erected on the supporting groove, so that the possibility of deviation or uneven stress of the finished bearing is reduced, and the accuracy of the measured starting torque is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a bearing starting torque measuring device. Background Art

[0002] Crossed roller bearings are important components used for rotating support of mechanical bodies. The finished bearing usually includes a bearing outer ring, a bearing inner ring and a number of rollers. The bearing inner ring is provided with positioning holes, and grooves are provided on the opposite walls of the bearing outer ring and the bearing inner ring. A raceway for the rolling of a number of rollers is formed between the two grooves.

[0003] The starting torque of a crossed roller bearing refers to the torque required when the bearing starts. At the moment the crossed roller bearing starts, there is friction resistance inside the bearing, and the starting torque is the torque required to overcome this friction resistance. Under different preload forces, the friction between the bearing rollers and the inner and outer rings is different, so the starting torque of the bearing under different preload forces is different. The existing method of measuring the starting torque of a crossed roller bearing is that the operator manually holds the bearing or clamps the bearing with a clamping device such as a vise, connects the test device to the inner ring of the bearing, and then rotates the test device. The maximum value displayed on the test device is the starting torque.

[0004] During use of the above measurement method, the measured starting torque is affected by the holding angle or the clamping force of the clamping device such as a vise, and the test data is unstable and has poor accuracy, making it difficult to accurately measure the starting torque of the bearing. Summary of the invention

[0005] In order to help solve the problem that the starting torque measured by the existing operator holding the bearing by hand or clamping the bearing with a vise is affected by the clamping force, etc., and the data is unstable and has poor accuracy, the present application provides a bearing starting torque measuring device, which adopts the following technical scheme: it includes a test seat, the test seat is provided with a positioning groove matching the finished bearing, the groove wall of the positioning groove is provided with a supporting groove matching the outer ring of the bearing, the outer ring of the bearing is mounted on the supporting groove and the inner ring of the bearing is partially suspended in the positioning groove, and also includes an auxiliary block connected to the inner ring of the bearing through a first connecting component, and the auxiliary block is provided with a second connecting component for connecting to the test device.

[0006] Through the above technical solution, when it is necessary to measure the starting torque of the finished bearing, the operator connects the test device to the auxiliary block using the second connecting component, and the auxiliary block is connected to the inner ring of the bearing using the first connecting component. The auxiliary block is driven by the test device to rotate so that the inner ring of the bearing rotates smoothly. The value displayed on the test device is the starting torque of the cross roller bearing. The support groove supports the finished bearing, and the outer ring of the bearing is stably mounted on the support groove, which reduces the possibility of displacement or uneven force of the finished bearing and improves the accuracy of the measured starting torque.

[0007] In a specific possible implementation manner, the first connecting assembly includes a positioning block arranged on the auxiliary block, the positioning block matches the positioning hole of the bearing inner ring and the positioning block is inserted into the positioning hole.

[0008] Through the above technical solution, the auxiliary block is connected to the inner ring of the bearing by inserting the positioning block into the positioning hole of the inner ring of the bearing. The positioning block provides a guide for the transmission of the auxiliary block force, thereby improving the convenience of measuring the starting torque of the finished bearing.

[0009] In a specific possible implementation manner, the second connecting component includes a fixing hole opened on the auxiliary block, and the fixing hole is used to connect with the testing device.

[0010] Through the above technical solution, the test device is connected to the auxiliary block through the fixing hole, and the position of the test device when measuring each finished bearing is fixed, thereby improving the accuracy of measuring the starting torque.

[0011] In a specific implementation manner, the fixing hole is a square hole.

[0012] Through the above technical solution, the square hole limits the angle of the test device, reduces the possibility of deflection after the test device is connected to the auxiliary block to affect the measured starting torque value, and improves the stability and accuracy of measuring the starting torque.

[0013] In a specific possible implementation manner, the axis of the fixing hole coincides with the central axis of the bearing inner ring.

[0014] Through the above technical solution, the axis of the fixing hole coincides with the central axis of the bearing inner ring so that the fixing hole is located at the center of the bearing inner ring. The test device is evenly stressed during the measurement process, thereby improving the accuracy of measuring the starting torque of the finished bearing.

[0015] In a specific possible implementation manner, a pressure block is provided on the surface of the test seat facing the auxiliary block, and the outer ring of the bearing is pressed tightly between the pressure block and the test seat.

[0016] Through the above technical solution, the pressure block limits the position of the finished bearing, reduces the possibility of shaking or shifting of the finished bearing during the measurement process, improves the stability of the overall placement of the finished bearing, and thus improves the accuracy of the measured starting torque data.

[0017] In a specific implementation scheme, a mounting hole is provided on the pressing block, a mounting bolt matching the mounting hole is passed through the mounting hole, a mounting groove is provided on the surface of the test seat facing the pressing block, and the mounting bolt is threadedly connected in the mounting groove.

[0018] Through the above technical solution, the operator can remove the pressing block from the test seat by disassembling the bolts, which is more flexible.

[0019] In a specific possible implementation scheme, a limiting hole is provided on the pressing block, and the finished bearing part is inserted into the limiting hole.

[0020] Through the above technical solution, the limiting hole further limits the position of the finished bearing, reducing the possibility of the finished bearing being offset during the measurement process, thereby improving the accuracy of the measured starting torque data.

[0021] In a specific possible implementation manner, a connection hole is formed on the surface of the test socket facing away from the auxiliary block.

[0022] Through the above technical solution, the test socket can be conveniently connected to the external structure through the connecting hole, which increases flexibility and improves applicability.

[0023] In a specific possible implementation manner, a countersunk groove communicating with the connecting hole is formed at the bottom of the positioning groove.

[0024] Through the above technical solution, the countersunk groove reduces the possibility of interference with the inner ring of the bearing when the test seat is connected to the external structure.

[0025] In summary, the present application has the following beneficial technical effects: when it is necessary to measure the starting torque of the finished bearing, the operator connects the test device to the auxiliary block using the second connecting assembly, and the auxiliary block is connected to the inner ring of the bearing using the first connecting assembly. The auxiliary block is driven to rotate by the test device so that the inner ring of the bearing rotates smoothly, and the value displayed on the test device is the starting torque of the cross roller bearing. The support groove supports the finished bearing, and the outer ring of the bearing is stably mounted on the support groove, which reduces the possibility of displacement or uneven force of the finished bearing and improves the accuracy of the measured starting torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the present application.

[0027] Figure numerals: 1. test seat; 2. positioning groove; 3. supporting groove; 4. positioning block; 5. positioning hole; 6. fixing hole; 7. pressing block; 8. mounting hole; 9. mounting groove; 10. limiting hole; 11. connecting hole; 12. countersunk groove; 13. auxiliary block; 14. finished bearing; 15. bearing inner ring; 16. bearing outer ring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 This application is described in further detail.

[0029] An embodiment of the present application discloses a bearing starting torque measuring device.

[0030] Reference Figure 1 The bearing starting torque measuring device includes a test seat 1, on which a positioning groove 2 matching the size of a finished bearing 14 is provided. In the embodiment of the present application, the size of the positioning groove 2 is slightly larger than the size of a bearing inner ring 15. A supporting groove 3 matching the size of a bearing outer ring 16 is provided on the groove wall of the positioning groove 2. The bearing outer ring 16 is mounted on the supporting groove 3 and the bearing inner ring 15 is partially suspended in the positioning groove 2. A certain gap is left between the outer edge of the bearing inner ring 15 and the positioning groove 2 and between the bottom of the bearing inner ring 15 and the groove bottom of the positioning groove 2. When the bearing inner ring 15 rotates during the measurement process, the possibility of friction generated by the contact between the bearing inner ring 15 and the groove wall of the positioning groove 2 is reduced, and the test seat 1 does not contact and interfere with the bearing inner ring 15, thereby ensuring the accuracy of the measured starting torque.

[0031] Reference Figure 1 The bearing starting torque measuring device also includes an auxiliary block 13 connected to the bearing inner ring 15 through a first connecting component, and the first connecting component includes a positioning block 4 fixedly connected to the auxiliary block 13, and the positioning block 4 matches the positioning hole 5 of the bearing inner ring 15 in size and the positioning block 4 is inserted into the positioning hole 5. Therefore, by inserting the positioning block 4 into the positioning hole 5 of the bearing inner ring 15, the auxiliary block 13 is connected to the bearing inner ring 15, and the positioning block 4 provides a guiding effect on the transmission of the force of the auxiliary block 13, thereby improving the convenience of measuring the starting torque of the finished bearing 14.

[0032] Reference Figure 1 A connection hole 11 is provided on the surface of the test seat 1 away from the auxiliary block 13, through which the test seat 1 can be conveniently connected to the external structure, which is more flexible and improves applicability. A countersunk groove 12 is provided at the bottom of the positioning groove 2 and communicates with the connection hole 11. The countersunk groove 12 reduces the possibility of interference with the bearing inner ring 15 when the test seat 1 is connected to the external structure.

[0033] Reference Figure 1, a second connection assembly for connecting with the test device is provided on the auxiliary block 13. The test device in the embodiment of the present application adopts a torque wrench, and the maximum value displayed on the torque wrench is the measured starting torque. The second connection assembly includes a fixing hole 6 opened on the auxiliary block 13, and the fixing hole 6 is used to connect with the test device. The fixing hole 6 is a square hole, which plays a limiting role on the angle of the test device, reducing the possibility of deflection after the test device is connected to the auxiliary block 13 to affect the measured starting torque value. The axis of the fixing hole 6 coincides with the central axis of the bearing inner ring 15, and the axis of the fixing hole 6 coincides with the central axis of the bearing inner ring 15 so that the fixing hole 6 is located at the center of the bearing inner ring 15. The test device is uniformly stressed during the measurement process, which improves the accuracy of measuring the starting torque of the finished bearing 14. Therefore, the test device is connected to the auxiliary block 13 through the fixing hole 6, and the position of the test device when measuring each finished bearing 14 is fixed, which improves the accuracy of measuring the starting torque.

[0034] Reference Figure 1 , a pressing block 7 is arranged on the surface of the test seat 1 facing the auxiliary block 13, a mounting hole 8 is provided on the pressing block 7, a mounting bolt matching the size of the mounting hole 8 is passed through the mounting hole 8, a mounting groove 9 is provided on the surface of the test seat 1 facing the pressing block 7, the mounting bolt is threadedly connected in the mounting groove 9, and the outer ring 16 of the bearing is pressed between the pressing block 7 and the test seat 1. The operator can remove the pressing block 7 from the test seat 1 by means of bolt disassembly, which is more flexible. A limiting hole 10 is provided on the pressing block 7, and the finished bearing 14 is partially passed through the limiting hole 10. The limiting hole 10 further limits the position of the finished bearing 14, reduces the possibility of the finished bearing 14 shifting during the measurement process, and thus improves the accuracy of the measured starting torque data. Therefore, the pressing block 7 limits the position of the finished bearing 14, reduces the possibility of the finished bearing 14 shaking or shifting during the measurement process, and improves the stability of the overall placement of the finished bearing 14.

[0035] The implementation principle of the embodiment of the present application is as follows: after the operator installs the test seat 1 in place through the connecting hole 11, the outer ring 16 of the bearing finished product 14 is mounted on the supporting groove 3 and the inner ring 15 of the bearing is partially suspended and inserted into the positioning groove 2, the pressing block 7 is mounted on the test seat 1, so that the inner ring 15 of the bearing is partially located at the inner edge of the limiting hole 10 of the pressing block 7, and then the pressing block 7 is connected to the test seat 1 as a whole by using the mounting bolts, the positioning block 4 of the auxiliary block 13 is inserted into the positioning hole 5 of the inner ring 15 of the bearing, so that the auxiliary block 13 is connected to the inner ring 15 of the bearing, and then the testing device, such as a torque wrench, is inserted into the fixing hole 6 of the auxiliary block 13, so that the torque wrench is connected to the auxiliary block 13, and the torque wrench is rotated, so that the torque wrench drives the inner ring 15 of the bearing to rotate smoothly, and the maximum value displayed on the torque wrench is the measured starting torque of the cross roller bearing. The bearing outer ring 16 is stably mounted on the support groove 3. The test seat 1 is used to reduce the possibility of displacement or uneven force on the bearing finished product 14. Part of the bearing outer ring 16 is pressed between the pressure block 7 and the test seat 1, which improves the stability of the overall placement of the crossed roller bearing and improves the accuracy of the measured starting torque.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A bearing starting torque measuring device, characterized in that: The invention comprises a test seat (1), wherein a positioning groove (2) matching a finished bearing (14) is provided on the test seat (1), a supporting groove (3) matching a bearing outer ring (16) is provided on the groove wall of the positioning groove (2), the bearing outer ring (16) is mounted on the supporting groove (3) and a portion of the bearing inner ring (15) is suspended and penetrated in the positioning groove (2), and further comprises an auxiliary block (13) connected to the bearing inner ring (15) via a first connecting component, wherein a second connecting component for connecting to a test device is provided on the auxiliary block (13).

2. The bearing starting torque measuring device according to claim 1, characterized in that: The first connection assembly comprises a positioning block (4) arranged on the auxiliary block (13), the positioning block (4) matches the positioning hole (5) of the bearing inner ring (15) and the positioning block (4) is inserted into the positioning hole (5).

3. The bearing starting torque measuring device according to claim 1, characterized in that: The second connection assembly comprises a fixing hole (6) opened on the auxiliary block (13), and the fixing hole (6) is used to connect with the testing device.

4. The bearing starting torque measuring device according to claim 3 is characterized in that: The fixing hole (6) is a square hole.

5. The bearing starting torque measuring device according to claim 3 is characterized in that: The axis of the fixing hole (6) coincides with the central axis of the bearing inner ring (15).

6. The bearing starting torque measuring device according to claim 1, characterized in that: A pressure block (7) is provided on the surface of the test seat (1) facing the auxiliary block (13), and the bearing outer ring (16) is pressed tightly between the pressure block (7) and the test seat (1).

7. The bearing starting torque measuring device according to claim 6, characterized in that: The pressing block (7) is provided with a mounting hole (8), a mounting bolt matching the mounting hole (8) is passed through the mounting hole (8), a mounting groove (9) is provided on the surface of the test seat (1) facing the pressing block (7), and the mounting bolt is threadedly connected in the mounting groove (9).

8. The bearing starting torque measuring device according to claim 6, characterized in that: The pressing block (7) is provided with a limiting hole (10), and the finished bearing (14) is partially inserted into the limiting hole (10).

9. The bearing starting torque measuring device according to claim 1, characterized in that: A connection hole (11) is provided on the surface of the test seat (1) facing away from the auxiliary block (13).

10. The bearing starting torque measuring device according to claim 9, characterized in that: The bottom of the positioning groove (2) is provided with a countersunk groove (12) which communicates with the connecting hole (11).

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