A measuring device

Abstract

The present invention discloses a measuring device, which comprises a reference sleeve, a support arm, a first guide wheel, a track, a slider, a sliding plate, a second guide wheel, a motor and a spline shaft; the upper end of the support arm is rotatably provided with two first guide wheels; the sliding plate is rotatably provided with a second guide wheel, the output shaft of the motor drives the main shaft to rotate, a shaft sleeve is coaxially fixed on the main shaft, and a spline shaft is provided in the shaft sleeve. When the measuring device of the present invention is used, firstly, the brake disc and the wheel hub fall from top to bottom, the wheel hub shaft enters the reference sleeve, the reference surface of the wheel hub contacts the reference surface of the reference sleeve, and at the same time, the spline shaft enters the spline hole of the wheel hub, and is centered by the first guide wheel and the second guide wheel, thereby solving the problems of wheel hub shaking and center offset.

Description

Technical Field

[0001] The invention relates to a measuring device and belongs to the field of automobile parts detection. Background Art

[0002] Brake discs and wheel hubs are important vehicle components, and their quality is directly related to the personal safety of drivers and pedestrians. Therefore, when brake discs and wheel hubs leave the factory, their key quality parameters need to be tested to ensure that their quality meets national regulations.

[0003] However, in the inspection process of the brake disc in the prior art, the mounting screw is used as the driving point, and the driving pin is used to drive the mounting screw to rotate the product; however, since the product itself is relatively heavy, if the product is driven in the current manner when rotating, the product will shake and the center will shift, resulting in poor repeatability during measurement and affecting the stability of the equipment. Summary of the invention

[0004] The object of the present invention is to provide a measuring device which solves at least one of the above technical problems.

[0005] The present invention solves the technical problem by adopting the following technical solution: a measuring device, which includes a reference sleeve, a support arm, a first guide wheel, a track, a slider, a sliding plate, a second guide wheel, a motor and a spline shaft;

[0006] The reference sleeve is installed on a workbench; a support arm is fixed on the workbench;

[0007] The upper end of the support arm is rotatably provided with two first guide wheels, the first guide wheels are parallel to the axis of the reference sleeve, and a first opening is opened on the outer wall surface of the reference sleeve relative to the position of the first guide wheels, and a part of the first guide wheel passes through the first opening and is located inside the reference sleeve;

[0008] The workbench is provided with a track, the slider is slidably arranged on the track, and the sliding plate is fixed on the slider;

[0009] A driving device is fixed on the workbench, and the driving device drives the sliding plate to move;

[0010] The sliding plate is rotatably provided with a second guide wheel, the outer wall surface of the reference sleeve is provided with a second opening at a position corresponding to the second guide wheel, and the axis of the second guide wheel is parallel to the axis of the first guide wheel, and when the sliding plate moves, a part of the second guide wheel passes through the second opening and is located inside the reference sleeve;

[0011] The output shaft of the motor drives the main shaft to rotate. A shaft sleeve is coaxially fixed on the main shaft, and a spline shaft is arranged in the shaft sleeve.

[0012] Optionally, a through hole is opened on the workbench, and the lower end of the outer wall of the reference sleeve forms a lower flange, and the lower end of the reference sleeve is inserted into the through hole, and the lower surface of the lower flange is supported on the upper surface of the workbench.

[0013] Optionally, the upper end of the reference sleeve extends outward to form an upper flange, the upper plane of the upper flange is the reference plane, and the upper plane of the upper flange contacts the reference plane of the wheel hub.

[0014] Optionally, the number of the first guide wheels is 2.

[0015] Optionally, the length direction of the track is perpendicular to a line connecting the two first guide wheels.

[0016] Optionally, the number of the tracks is two, the two tracks are parallel to each other, the number of the sliders is four, and two sliders are arranged on each track.

[0017] Optionally, the driving device is a cylinder, which is located below the workbench, the cylinder body of the cylinder is fixed to the workbench, the piston rod of the cylinder is connected to the sliding plate through a vertically arranged connecting arm, and the sliding plate is located above the workbench.

[0018] Optionally, an elongated groove is formed at the upper end of the sleeve; a screw hole is formed at the lower end of the spline shaft corresponding to the position of the elongated groove, an adjusting screw is installed in the screw hole, and the adjusting screw is located in the elongated groove and can move up and down along the elongated groove.

[0019] The present invention has the following beneficial effects: when the measuring device of the present invention is in use, first the brake disc and the wheel hub fall from top to bottom, the hub shaft of the wheel hub enters into the reference sleeve, the reference surface of the wheel hub contacts the reference surface of the reference sleeve, and at the same time the spline shaft enters into the spline hole of the wheel hub, and is centered by the first guide wheel and the second guide wheel, thereby solving the problems of wheel hub shaking and center offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a measuring device of the present invention;

[0021] Figure 2 for Figure 1 AA section view;

[0022] The markings in the figure are as follows: 1-spline shaft; 2-sleeve; 3-first spring; 4-first guide wheel; 5-second guide wheel; 6-reference sleeve; 7-track; 8-slider; 9-sliding plate; 10-connecting arm; 11-reducer; 12-spindle; 13-brake disc; 14-wheel hub; 15-second spring; 16-fixed block; 17-driving device; 18-motor. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the embodiments and drawings.

[0024] Example 1

[0025] This embodiment provides a measuring device for measuring a brake disc and a wheel hub assembly, that is, a measuring device for detecting a brake disc and a wheel hub, and includes: a reference sleeve, a support arm, a first guide wheel, a track, a slider, a sliding plate, a second guide wheel, a motor and a spline shaft.

[0026] The reference sleeve is installed on a workbench. In this embodiment, a through hole is opened on the workbench, and a lower flange is formed at the lower end of the outer wall of the reference sleeve, and the lower end of the reference sleeve is inserted into the through hole. The lower surface of the lower flange is supported on the upper surface of the workbench, so that the reference sleeve can be firmly fixed on the workbench.

[0027] In this embodiment, the upper end of the reference sleeve extends outward to form an upper flange, and the upper plane of the upper flange is the reference plane. When in use, the upper plane of the upper flange contacts the reference plane of the brake disc and the hub of the wheel hub assembly.

[0028] A support arm is fixed on the workbench. In the present embodiment, two first guide wheels are rotatably provided on the upper end of the support arm. In the present embodiment, the first guide wheels are parallel to the axis of the reference sleeve, and a first opening is provided on the outer wall surface of the reference sleeve relative to the position of the first guide wheel. A part of the first guide wheel passes through the first opening and is located inside the reference sleeve.

[0029] Two parallel tracks are arranged on the workbench. In this embodiment, the length direction of the tracks is perpendicular to the line connecting the two first guide wheels.

[0030] The slider is slidably arranged on the track. In the present embodiment, the number of the sliders is four, i.e., two sliders are arranged on each track, and a sliding plate is fixed on the slider. In the present embodiment, a cylinder (driving device) is fixed on the workbench, and the cylinder pushes the sliding plate to move. Preferably, the cylinder is located below the workbench, the cylinder body of the cylinder is fixed to the workbench, the piston rod of the cylinder is connected to the sliding plate through a vertically arranged connecting arm, and the sliding plate is located above the workbench.

[0031] One end of the sliding plate is connected to a fixed block via a second spring, and the fixed block is disposed on the workbench so that the sliding plate can be reset by the pulling force of the second spring. In this embodiment, the cylinder pushes the sliding plate to move to the right, so that the second guide wheel moves away from the reference sleeve, and under the action of the second spring, the second guide wheel moves to the left and enters the interior of the reference sleeve.

[0032] A second guide wheel is rotatably provided on the sliding plate, and a second opening is provided on the outer wall surface of the reference sleeve relative to the position of the second guide wheel, and the axis of the second guide wheel is parallel to the axis of the first guide wheel. When the sliding plate moves, part of the second guide wheel can pass through the second opening and be located inside the reference sleeve.

[0033] The output shaft of the motor drives the main shaft to rotate through the reducer, and a sleeve is coaxially fixed on the main shaft, and a spline shaft is arranged in the sleeve. In this embodiment, an elongated groove is opened at the upper end of the sleeve. Preferably, the length direction of the elongated groove is arranged along the axial direction of the sleeve, and there are 3 elongated grooves, which are evenly distributed along the circumference of the spline shaft; a screw hole is formed at the lower end of the spline shaft corresponding to the position of the elongated groove, and an adjusting screw is installed in the screw hole, and the adjusting screw is located in the elongated groove and can move up and down along the elongated groove, so as to realize the axial limitation of the spline shaft and the power transmission between the sleeve and the spline shaft through the adjusting screw.

[0034] More preferably, a first spring is arranged between the bottom end of the spline shaft and the bottom wall of the hole of the sleeve.

[0035] Preferably, the reducer includes a driving gear and a driven gear, the driving gear is drivingly connected to the output shaft of the motor, the driven gear drives the main shaft to rotate, the main shaft drives the sleeve to rotate, the sleeve drives the spline shaft to rotate, and finally, the spline shaft drives the brake disc and the wheel hub to rotate.

[0036] When the measuring device of the present invention is used, first the brake disc and the wheel hub fall downward from top to bottom, the hub shaft of the wheel hub enters the reference sleeve, the reference surface of the wheel hub contacts the reference surface of the reference sleeve, and the spline shaft enters the spline hole of the wheel hub.

[0037] When the spline shaft is stuck at the chamfered edge of the spline hole and cannot engage effectively, the brake disc and the wheel hub will press the spline shaft down to the limit position. When the main shaft rotates to drive the sleeve and the spline shaft to rotate, the spline shaft will be bounced into the spline hole due to the elastic force of the first spring.

[0038] When the brake disc and the wheel hub are moving downward, the outer side of the wheel hub shaft will slightly contact the two first guide wheels but not the second guide wheel. When the brake disc and the wheel hub are completely moved down, the cylinder stops supplying air. Under the action of the second spring force, the sliding plate moves to the left, causing the second guide wheel on the sliding plate to stick to the outer side of the wheel hub shaft, and at the same time, the two first guide wheels also stick to the outer side of the wheel hub shaft, and finally the positioning is completed.

[0039] In this embodiment, the inner diameter of the reference sleeve is slightly larger than the outer diameter of the wheel hub, so as to avoid collision between the wheel hub and the first guide wheel; preferably, the inner diameter of the reference sleeve is 1-2 mm larger than the outer diameter of the wheel hub.

[0040] The order of the above embodiments is only for the convenience of description and does not represent the advantages or disadvantages of the embodiments.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A measuring device, characterized in that: It includes a reference sleeve, a support arm, a first guide wheel, a track, a slider, a sliding plate, a second guide wheel, a motor and a spline shaft; The reference sleeve is installed on the workbench, the upper end of the reference sleeve extends outward to form an upper flange, and the upper plane of the upper flange is the reference plane; a support arm is fixed on the workbench, and a through hole is opened on the workbench, the lower end of the outer wall of the reference sleeve forms a lower flange, and the lower end of the reference sleeve is inserted into the through hole, and the lower surface of the lower flange is supported on the upper surface of the workbench; The upper end of the support arm is rotatably provided with two first guide wheels, the first guide wheels are parallel to the axis of the reference sleeve, and a first opening is opened on the outer wall surface of the reference sleeve relative to the position of the first guide wheels, and a part of the first guide wheel passes through the first opening and is located inside the reference sleeve; The workbench is provided with a track and a fixed block, the slider is slidably arranged on the track, the sliding plate is fixed on the slider, and one end of the sliding plate is connected to the fixed block through a second spring; a driving device is fixed on the workbench, and the driving device drives the sliding plate to move; The sliding plate is rotatably provided with a second guide wheel, the outer wall surface of the reference sleeve is provided with a second opening at a position corresponding to the second guide wheel, and the axis of the second guide wheel is parallel to the axis of the first guide wheel, and when the sliding plate moves, a part of the second guide wheel passes through the second opening and is located inside the reference sleeve; The output shaft of the motor drives the main shaft to rotate, and a sleeve is coaxially fixed on the main shaft, and an elongated groove is formed on the upper end of the sleeve, a spline shaft is arranged in the sleeve, and a screw hole is formed at the lower end of the spline shaft corresponding to the position of the elongated groove, and an adjusting screw is installed in the screw hole, and the adjusting screw is located in the elongated groove and can move up and down along the elongated groove; When the measuring device is in use, the hub shaft of the wheel hub enters into the reference sleeve, the reference surface of the wheel hub contacts with the reference surface of the reference sleeve, the spline shaft enters into the spline hole of the wheel hub, and under the action of the second spring tension, the sliding plate is reset, the second guide wheel on the sliding plate is pressed against the outer side of the hub shaft, and the first guide wheel is pressed against the outer side of the hub shaft.

2. The measuring device according to claim 1, characterized in that The length direction of the track is perpendicular to the line connecting the two first guide wheels.

3. The measuring device according to claim 2, characterized in that The number of the tracks is two, and the two tracks are parallel to each other. The number of the sliders is four, and two sliders are arranged on each track.

4. The measuring device according to claim 1, characterized in that The driving device is a cylinder, which is located below the workbench. The cylinder body of the cylinder is fixed to the workbench. The piston rod of the cylinder is connected to the sliding plate through a vertically arranged connecting arm, and the sliding plate is located above the workbench.

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