An angle measuring device

Abstract

The utility model discloses an angle measuring device, including the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration block and the fixed snap ring of the concentricity of the arc calibration

Description

Technical Field

[0001] This utility model relates to the technical field of testing equipment for automotive steering intermediate shafts, specifically an angle measuring device. Background Technology

[0002] Electric power steering (ESP), particularly column-type ESP, has become a standard feature in passenger vehicles, especially SUVs. This has led to new demands for higher torque transmission, improved responsiveness, higher reliability, and superior NVH performance from the steering shaft. Therefore, accurate measurement of the torsional clearance of the steering shaft is crucial during testing and production. Patent publication number CN215177573U discloses a device for measuring the clearance of an automotive steering intermediate shaft. Specifically, it discloses a fork fixed angle measuring device and an axial fixed angle measuring device on one side of the automotive steering intermediate shaft. The axial fixed angle measuring device includes a fixed base, a bracket on the fixed base, a crossbar shaft on the bracket, a crossbar fixed to the crossbar shaft, and an axial grating ruler reading head assembly at the end of the crossbar. Below the axial grating ruler reading head assembly is an axial grating ruler fixing seat, with a grating ruler on top of the axial grating ruler fixing seat and a fixing ring below the axial grating ruler fixing seat. However, the axial grating ruler fixing seat and the axial grating ruler reading head assembly are in contact with each other, and there is friction between them. When measuring the angle of the shaft to be measured, the axial grating ruler reading head assembly will shake, resulting in inaccurate angle measurement, poor measurement stability, and the inability to measure the angle of a horizontally positioned shaft. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an angle measuring device that can measure angles more accurately and stably, and can measure the angles of the shaft under test in different settings, thus effectively solving the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an angle measuring device, comprising an arc-shaped calibration block on a digital height gauge and a fan-shaped grating ruler mounting base concentrically mounted on a fixing ring. The digital display of the height gauge is provided with measuring jaws, which are fixedly connected to the arc-shaped calibration block via a connector. The arc-shaped bottom surface of the arc-shaped calibration block is an abutting arc surface A, and one axial end surface of the arc-shaped calibration block is an abutting plane A. A horizontally arranged grating ruler reading head assembly is fixedly mounted on the upper end of the arc-shaped calibration block. The fixing ring is used to connect the shaft to be measured. A grating ruler is mounted on the outer arc-shaped surface of the fan-shaped grating ruler mounting base. One axial end surface of the fan-shaped grating ruler mounting base is an abutting plane B. An arc-shaped protrusion is concentrically mounted on the abutting plane B of the fan-shaped grating ruler mounting base, and the top arc surface of the arc-shaped protrusion is an abutting arc surface B. The arc of the outer arc-shaped surface, the abutting arc surface A, and the abutting arc surface B of the fan-shaped grating ruler mounting base are all the same.

[0005] Furthermore, a connecting frame is fixedly provided on the measuring jaw; the connecting member is a crossbar, the connecting frame is provided with a sliding groove adapted to the structure of the connecting member, and the connecting member is slidably nested in the sliding groove of the connecting frame, and a locking screw for tightening the connecting member is screwed on the connecting frame.

[0006] Furthermore, the end of the connector is provided with an optical axis, and the optical axis of the connector is inserted into the slide groove of the connecting frame, and the locking screw is used to tighten the optical axis of the connector.

[0007] Furthermore, a fixing protrusion is provided on the axial end face of the arc-shaped calibration block opposite to the abutment plane A. Fixing holes are provided on the fixing protrusion at the positions of the corresponding grating ruler reading head assembly and connector. The grating ruler reading head assembly and connector are fixedly connected to the arc-shaped calibration block by screws passing through their corresponding fixing holes.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: When measuring the rotation angle of the shaft to be measured, the arc-shaped calibration block and the grating ruler reading head assembly are in a non-contact state with the fan-shaped grating ruler mounting base. When the shaft to be measured rotates, there is no friction between the arc-shaped calibration block and the grating ruler reading head assembly and the fan-shaped grating ruler mounting base, making the angle measurement more accurate and stable. The arc-shaped calibration block can be rotated vertically by loosening the locking screw, and the angle of the shaft to be measured in different settings can be measured. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a perspective view of the angle measuring device of this utility model; Figure 3 This is a schematic diagram of the arc-shaped calibration block structure of this utility model; Figure 4 This is a schematic diagram of the mounting base for the fan-shaped grating ruler of this utility model.

[0010] In the diagram: 1. Digital height gauge; 11. Digital display dial indicator; 12. Measuring jaw; 2. Connecting component; 21. Optical axis; 3. Arc-shaped calibration block; 31. Abutting arc surface A; 32. Abutting plane A; 33. Fixing protrusion; 34. Fixing hole; 4. Grating ruler reading head assembly; 5. Fixing retaining ring; 6. Fan-shaped grating ruler mounting base; 61. Abutting plane B; 62. Arc-shaped protrusion; 621. Abutting arc surface B; 7. Connecting frame; 71. Locking screw; 8. Grating ruler. Detailed Implementation

[0011] 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. Example

[0012] Please see Figure 1-4 This utility model provides a technical solution: an angle measuring device, including an arc-shaped calibration block 3 on a digital height gauge 1 and a fan-shaped grating ruler mounting base 6 concentrically arranged on a fixing ring 5. The digital display 11 of the digital height gauge 1 is provided with a measuring jaw 12; a connecting frame 7 is fixedly provided on the measuring jaw 12, and the arc-shaped calibration block 3 is connected to the connecting frame 7 on the measuring jaw 12 through a connecting member 2; the connecting member 2 is a crossbar, and an optical axis 21 is provided at the end of the connecting member 2. The connecting frame 7 is provided with a sliding groove adapted to the optical axis 21, and the optical axis 21 of the connecting member 2 is inserted into the sliding groove of the connecting frame 7; a locking screw 71 for tightening the optical axis 21 is screwed onto the connecting frame 7; The arc-shaped bottom surface of the arc-shaped calibration block 3 is an abutting arc surface A31, and one axial end surface of the arc-shaped calibration block 3 is an abutting plane A32. A horizontally arranged grating ruler reading head assembly 4 is fixedly provided on the upper end of the arc-shaped calibration block 3. A fixing protrusion 33 is provided on the axial end surface of the arc-shaped calibration block 3 opposite to the abutting plane A32. Fixing holes 34 are provided on the fixing protrusion 33 at the positions corresponding to the grating ruler reading head assembly 4 and the connector 2. The grating ruler reading head assembly 4 and the connector 2 are fixedly connected to the arc-shaped calibration block 3 by screws passing through the corresponding fixing holes 34. The retaining ring 5 is used to connect the rotating shaft to be measured. The grating ruler 8 is installed on the outer arc surface of the fan-shaped grating ruler mounting base 6. One axial end face of the fan-shaped grating ruler mounting base 6 is an abutment plane B61. An arc-shaped protrusion 62 is provided on the abutment plane B61 of the fan-shaped grating ruler mounting base 6, which is concentric with it. The top arc surface of the arc-shaped protrusion 62 is an abutment arc surface B621. The arc of the outer arc surface, the abutment arc surface A31 and the abutment arc surface B621 of the fan-shaped grating ruler mounting base 6 are all the same. In use: The fan-shaped grating ruler mounting base 6 is coaxially mounted on the shaft to be measured using the fixing ring 5. The digital height gauge 1 is moved and the digital display 11 is slid, causing the arc surface A31 of the arc calibration block 3 to abut against the arc surface B621. A shim with a thickness of 0.02-0.05mm is inserted between the abutting plane A32 and the abutting plane B61, clamping the shim between them. Then, the shim is removed, causing the digital display 11 to raise the arc calibration block 3 by 0.02-0.05mm until the indicator light on the grating ruler reading head assembly 4 turns green. At this point, the grating ruler reading head assembly 4 and the grating ruler 8 are concentric. When the shaft to be measured rotates, the offset of the grating ruler 8 is monitored through the grating ruler reading head assembly 4. The reading is performed to measure the rotation angle of the shaft under test. When measuring the rotation angle of the shaft under test, the arc-shaped calibration block 3 and the grating ruler reading head assembly 4 are in a non-contact state with the fan-shaped grating ruler mounting base 6. When the shaft under test rotates, there is no friction between the arc-shaped calibration block 3 and the grating ruler reading head assembly 4 and the fan-shaped grating ruler mounting base 6, making the angle measurement more accurate and stable. When the shaft under test is tilted, the arc-shaped calibration block 3 can be vertically rotated by loosening the locking screw 71. The arc-shaped calibration block 3 can also fit against the tilted arc-shaped protrusion 62. After the arc-shaped calibration block 3 is adjusted to the correct angle, the locking screw 71 is tightened. The angle measuring device can be installed and used in accordance with the above method to measure the angle of the shaft under test in a tilted state.

[0013] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An angle measuring device, comprising an arc-shaped calibration block on a digital height scale and a sector-shaped grating scale mounting base concentrically mounted on a fixing ring, characterized in that: The digital display height gauge has a measuring jaw on its digital display, which is fixedly connected to an arc-shaped calibration block via a connector. The arc-shaped bottom surface of the arc-shaped calibration block is the abutting arc surface A, and one axial end surface of the arc-shaped calibration block is the abutting plane A. A horizontally arranged grating ruler reading head assembly is fixedly mounted on the upper end of the arc-shaped calibration block. The fixing ring is used to connect the rotating shaft to be measured. A grating ruler is mounted on the outer arc surface of the fan-shaped grating ruler mounting base. One axial end surface of the fan-shaped grating ruler mounting base is the abutting plane B. An arc-shaped protrusion is provided on the abutting plane B of the fan-shaped grating ruler mounting base, and the top arc surface of the arc-shaped protrusion is the abutting arc surface B. The arc of the outer arc surface of the fan-shaped grating ruler mounting base, the abutting arc surface A, and the abutting arc surface B are all the same.

2. The angle measuring device according to claim 1, characterized in that: A connecting frame is fixedly provided on the measuring jaw; the connecting member is a crossbar, the connecting frame is provided with a sliding groove adapted to the structure of the connecting member, and the connecting member is slidably nested in the sliding groove of the connecting frame, and a locking screw for tightening the connecting member is screwed on the connecting frame.

3. The angle measuring device according to claim 2, characterized in that: The connector has an optical axis at its end, and the optical axis of the connector is inserted into the slide groove of the connecting frame. The locking screw is used to tighten the optical axis of the connector.

4. The angle measuring device according to claim 2, characterized in that: The arc-shaped calibration block has a fixing protrusion on its axial end face opposite to the abutment plane A. The fixing protrusion has fixing holes at the positions of the corresponding grating ruler reading head assembly and connector. The grating ruler reading head assembly and connector are fixedly connected to the arc-shaped calibration block by screws passing through their corresponding fixing holes.

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