Shaft rotation angle measuring tool

Abstract

The utility model discloses a shaft rotation angle measuring tool which comprises a fixing piece used for positioning, a cross rod is rotatably arranged on the end portion of the fixing piece, a guide bearing is arranged on the end portion of the cross rod, a rotation tool is tightly attached to the shaft face of the guide bearing, and the rotation tool is connected with a V-shaped block in a clamping tool used for fixing a shaft to be measured. After the clamping tool clamps the to-be-detected shaft, the shaft rotates axially and drives the clamping tool to rotate synchronously, so that the rotary tool is driven to rotate, the sensor confirms the axial rotation angle of the shaft by detecting the rotation angle of the rotary tool, and the axial rotation angle of the shaft is detected by the rotation angle of the rotary tool. Therefore, accurate measurement of the rotation angle of the shaft is realized.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts testing equipment, and in particular to a tooling for measuring shaft rotation angle. Background Technology

[0002] The steering intermediate shaft is a key component of the automotive steering system, responsible for transmitting the steering force from the steering wheel to the steering gear, ensuring the driver can effectively control the vehicle's direction. As the "link" of the steering system, the steering intermediate shaft directly affects steering accuracy and driving safety. Its reliability ensures real-time synchronization between steering wheel operation and wheel steering, making it one of the core components affecting handling and driving safety. Therefore, it is necessary to detect the shaft rotation angle of the steering intermediate shaft. However, existing equipment is relatively difficult to use in detecting the shaft rotation angle. Furthermore, there are many different types of steering intermediate shafts, and the detection accuracy requirements for the testing device are high when the rotation angle is small. To address these issues and needs, this application proposes a solution. Summary of the Invention

[0003] Purpose of the utility model: The purpose of this utility model is to provide a shaft rotation angle measuring fixture that can be adapted to the detection of various shaft rotation angles, while having high detection accuracy and high detection efficiency.

[0004] Technical solution: The present invention provides a shaft rotation angle measuring fixture, comprising a fixing component for positioning, characterized in that: a crossbar is rotatably provided at the end of the fixing component, a guide bearing is provided at the end of the crossbar, a rotary fixture is tightly attached to the axial surface of the guide bearing, the rotary fixture is connected to a V-block in a clamping fixture for fixing the shaft to be measured, and a sensor for detecting the rotation angle of the rotary fixture is also provided at the end of the crossbar.

[0005] After the clamping fixture clamps the shaft to be measured, the shaft rotates axially, causing the clamping fixture to rotate synchronously, which in turn causes the rotary fixture to rotate. The sensor detects the rotation angle of the rotary fixture to confirm the angle of axial rotation of the shaft.

[0006] Preferably, the rotary tooling includes a connecting plate and an arc plate. One end of the connecting plate is connected to a V-block, and the other end is arc-shaped. The arc plate is located at one arc-shaped end of the connecting plate, and the arc of the arc plate is consistent with the arc of one arc-shaped end of the connecting plate. The arc surface of the arc plate is in close contact with the axial surface of the guide bearing during the measurement process.

[0007] Preferably, a grating ruler is provided on the arc surface of the arc plate that is in close contact with the guide bearing to improve the detection accuracy of the sensor.

[0008] The grating ruler is used to improve the accuracy of the sensor when detecting the rotation angle of the rotary tooling.

[0009] Preferably, the clamping fixture includes a quick-connect clamp and a V-block. The V-block is disposed on the inner wall of the quick-connect clamp. The V-groove on one side of the V-block matches the outer wall of the shaft to be measured. The other side of the V-block extends out of the inner wall of the quick-connect clamp and is connected to the rotary fixture.

[0010] The quick-connect clamp drives the V-block to clamp the shaft to be tested. At the same time, the V-block is connected to the rotary fixture to ensure that the rotary fixture rotates synchronously with the clamping fixture.

[0011] Preferably, the quick-connect clamp includes two semicircular rings and a nut, with one end of the two semicircular rings hinged and the other end screwed in by the nut.

[0012] Preferably, the V-block is detachably mounted on the inner wall of the quick-connect clamp and can be replaced according to different shafts to be tested.

[0013] The detachable and replaceable V-blocks can be adapted to various sizes of shafts to be tested, improving the adaptability of this device.

[0014] Preferably, a tensioning mechanism is also included, which includes a positioning rod and a tensioning spring. One end of the positioning rod is fixedly connected to a fixing member, and the other end is connected to a tensioning spring. When the crossbar is in working condition, it is perpendicular to the positioning rod, and the end of the crossbar without a guide bearing is connected to the end of the tensioning spring that is not connected to the positioning rod.

[0015] The end of the fixed positioning rod is connected to one end of the tension spring, and the other end of the tension spring is connected to the crossbar. If the crossbar becomes loose during the clamping of the rotary fixture, the tension spring will provide further elastic force to press the crossbar onto the rotary fixture, ensuring that the guide bearing and the rotary fixture are clamped and fitted, thereby ensuring the consistency of the distance between the sensor and the grating ruler and ensuring the accuracy of the detection.

[0016] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0017] (1) It can be compatible with the measurement of products of various specifications. Only the V-block in the clamping fixture needs to be replaced to match shafts of different diameters.

[0018] (2) The detection accuracy of the sensor is improved by setting a grating ruler on the rotary tooling;

[0019] (3) By using a tension spring, when the shaft rotates, the guide bearing on the crossbar is pressed tightly against the rotary fixture, ensuring that the distance between the sensor and the grating ruler is consistent and ensuring detection accuracy. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is a front view of the present invention.

[0022] Figure 3 This is the right view of the present invention.

[0023] The components are: 1. Fixture; 2. Crossbar; 3. Guide bearing; 4. Rotary fixture; 5. Clamping fixture; 6. Sensor; 7. Tensioning mechanism; 41. Connecting plate; 42. Arc plate; 51. V-block; 52. Quick-connect clamp; 71. Positioning rod; 72. Tensioning spring. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0025] See appendix Figures 1-3 Figure 1 shows a shaft rotation angle measuring fixture of this utility model, including a fixing member 1 for positioning. The fixing member 1 is used to fix the fixture as a whole in the testing site. A crossbar 2 is rotatably provided at the end of the fixing member 1. A guide bearing 3 is provided at the end of the crossbar 2. A rotary fixture 4 is closely attached to the axial surface of the guide bearing 3. The rotary fixture 4 is connected to a V-block 51 in a clamping fixture 5 for fixing the shaft to be measured. A sensor 6 for detecting the rotation angle of the rotary fixture is also provided at the end of the crossbar 2. In this embodiment, the sensor 6 is a Renishaw RH100X30D05A.

[0026] After the clamping fixture 5 clamps the shaft to be tested, the shaft rotates axially, causing the clamping fixture 5 to rotate synchronously, which in turn causes the rotary fixture 4 to rotate. The sensor 6 detects the rotation angle of the rotary fixture 4 to confirm the angle of axial rotation of the shaft.

[0027] In this embodiment, the rotary fixture 4 includes a connecting plate 41 and an arc plate 42. One end of the connecting plate 41 is connected to a V-block 51, and the other end is arc-shaped. The arc plate 42 is disposed at the arc-shaped end of the connecting plate 41, and the curvature of the arc plate 42 is consistent with the curvature of the arc-shaped end of the connecting plate 41. During the measurement process, the arc surface of the arc plate 42 is in close contact with the axial surface of the guide bearing 3, ensuring that the relative position between the sensor 6 and the rotary fixture 4 remains unchanged during the rotation of the shaft, thus ensuring the detection accuracy.

[0028] In this embodiment, a grating ruler is provided on the arc surface of the arc plate 42 that is close to the guide bearing 3 to improve the detection accuracy of the sensor 6. The grating ruler is provided to improve the detection accuracy of the sensor 6 when detecting the rotation angle of the rotary tooling 4. Similarly, in this embodiment, the grating ruler is Renishaw HK-0400-0002.

[0029] In this embodiment, the clamping fixture 5 includes a quick-connect clamp 52 and a V-block 51. The V-block 51 is disposed on the inner wall of the quick-connect clamp 52. The V-groove on one side of the V-block 51 matches the outer wall of the shaft to be tested. The other side of the V-block 51 extends out of the inner wall of the quick-connect clamp 52 and is connected to the rotary fixture 4. The quick-connect clamp 42 drives the V-block 41 to clamp the shaft to be tested. At the same time, the V-block 41 is connected to the rotary fixture 4 to ensure that the rotary fixture 4 rotates synchronously with the clamping fixture 5.

[0030] In this embodiment, the quick-connect clamp 52 includes two semicircular rings and a nut. One end of the two semicircular rings is hinged to each other, and the other end is screwed to the nut, which facilitates quick opening and locking.

[0031] In this embodiment, the V-block 51 is detachably mounted on the inner wall of the quick-connect clamp 52 and can be replaced according to different shafts to be tested. The detachable and replaceable V-block 51 can adapt to a variety of shafts to be tested of different specifications, thereby improving the adaptability of this device.

[0032] In this embodiment, a tensioning mechanism 7 is also included. The tensioning mechanism 7 includes a positioning rod 71 and a tension spring 72. One end of the positioning rod 71 is fixedly connected to a fixing member, and the other end is connected to the tension spring 72. When the crossbar 2 is in the working state, it is perpendicular to the positioning rod 71. The end of the crossbar 2 without the guide bearing 3 is connected to the end of the tension spring 72 that is not connected to the positioning rod 71. The fixed end of the positioning rod 71 is connected to one end of the tension spring 72, and the other end of the tension spring 72 is connected to the crossbar 2. Once the crossbar 2 is in the process of pressing the rotary fixture 4, When loosening occurs, the end of the crossbar 2 with the guide bearing 3 moves upward away from the rotating fixture 4, while the other end moves downward around the point where the crossbar 2 is connected to the fixing part 1. At this time, this end of the crossbar 2 applies a pulling force to the tension spring 72. The tension spring 72 pulls back this end of the crossbar 2 with its elastic force, preventing this end of the crossbar 2 from moving downward. This means that the end of the crossbar 2 with the guide bearing 3 continues to be pressed downward so that the guide bearing 3 fits with the rotating fixture 4, thereby ensuring the consistency of the distance between the sensor 6 and the grating ruler and ensuring the accuracy of the detection.

Claims

1. A tool for measuring the angle of rotation of a shaft, comprising a fixing element (1) for positioning, characterised in that: The end of the fixing part (1) is rotatably provided with a crossbar (2), the end of the crossbar (2) is provided with a guide bearing (3), the shaft surface of the guide bearing (3) is tightly provided with a rotary tool (4), the rotary tool (4) is connected with a V-shaped block (51) in a clamping tool (5) for fixing the shaft to be measured, and the end of the crossbar (2) is also provided with a sensor (6) for detecting the rotation angle of the rotary tool (4).

2. The shaft rotation angle measurement tool according to claim 1, wherein: The rotary tool (4) comprises a connecting plate (41) and an arc-shaped plate (42), one end of the connecting plate (41) is connected with the V-shaped block (51), the other end is in a circular arc shape, the arc-shaped plate (42) is arranged at the circular arc-shaped end of the connecting plate (41), the arc of the arc-shaped plate (42) is consistent with the arc of the circular arc-shaped end of the connecting plate (41), and the arc surface of the arc-shaped plate (42) tightly abuts the shaft surface of the guide bearing (3) during measurement.

3. The shaft rotation angle measurement tool according to claim 2, wherein: The arc-shaped plate (42) is provided with a grating ruler on one side arc surface of the guide bearing (3) for improving the detection accuracy of the sensor (6).

4. The shaft rotation angle measurement tool according to claim 1, wherein: The clamping tool (5) comprises a quick connecting clamp (52) and a V-shaped block (51), the V-shaped block (51) is arranged on the inner wall of the quick connecting clamp (52), the V-shaped groove on one side of the V-shaped block (51) is matched with the outer wall of the shaft to be measured, and the other side of the V-shaped block (51) extends out of the inner wall of the quick connecting clamp (52) and is connected with the rotary tool (4).

5. The shaft rotation angle measurement tool according to claim 4, wherein: The quick connecting clamp (52) comprises two semicircular rings and a nut, one end of the two semicircular rings is hinged, and the other end is screwed through the nut.

6. The shaft rotation angle measuring tool according to claim 4, wherein: The V-shaped block (51) is detachably arranged on the inner wall of the quick connecting clamp (52) and can be replaced according to different shafts to be measured.

7. The shaft rotation angle measurement tool according to claim 1, wherein: It also comprises a tensioning mechanism (7), the tensioning mechanism (7) comprises a positioning rod (71) and a tensioning spring (72), one end of the positioning rod (71) is fixedly connected with the fixing part (1), the other end is connected with the tensioning spring (72), the crossbar (2) is perpendicular to the positioning rod (71) in the working state, and the end of the crossbar (2) which is not provided with the guide bearing (3) is connected with the end of the tensioning spring (72) which is not connected with the positioning rod (71).

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