A chassis ground height measuring tool

Abstract

The present invention relates to a chassis ground height measuring tool, belonging to the technical field of automobile design and manufacturing. The chassis ground height measuring tool of the present invention comprises a base, a measuring rod assembly and a telescopic rod assembly; the base comprises a horizontal base plate, and a long hole extending along the Y direction is respectively arranged in the middle of both sides of the horizontal base plate, and a measuring rod assembly is respectively installed in the long holes on both sides, and a telescopic rod assembly is arranged on each measuring rod assembly; the measuring rod assembly comprises a measuring rod, a compression spring, a spring seat, a gasket and two locking nuts; the telescopic rod assembly comprises a sleeve, a switch shaft, a switch skeleton and a switch body. The measuring tool of the present invention can first adjust the height of the measuring rod according to the parameters of the vehicle model to be measured, and only needs to move the measuring rod to the camshaft position in the Y direction and observe whether the top of the measuring rod coincides with the measuring point. Moreover, there is no need to evacuate the tool when adjusting the chassis ground height, and the tool can be adjusted and measured at the same time, which is convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile design and manufacture, and more specifically, to a chassis ground clearance measuring tool. Background Art

[0002] In the prior art, most automobile manufacturers adjust the height of the chassis from the ground by standing in a pit and using a tool or tool with a scale (such as a ruler) to measure. Since the consistency of the angle between the measuring reference plane (Z direction) and the measuring tool and the ground is difficult to ensure, the measurement error (including single-side error and height difference between the two sides) is large. In addition, since the measuring point (usually the center of the camshaft or cam bolt head) is far from the person's line of sight, in order to ensure the measurement accuracy, the scale on the measuring tool is small, and the person has difficulty observing, which further increases the generation of measurement errors and affects the one-time pass rate of subsequent inspections and dynamic debugging. In view of the current problems, a measuring tool is designed to solve the problems of large measurement errors and difficult operation at the same time. Summary of the invention

[0003] In order to solve the above technical problems existing in the prior art, the purpose of the present invention is to provide a chassis ground height measurement tool.

[0004] The chassis ground height measuring tool of the present invention is characterized in that it comprises: a base, a measuring rod assembly and a telescopic rod assembly; the base comprises a horizontal base plate, a long hole extending along the Y direction is respectively arranged in the middle of the two sides of the horizontal base plate, a measuring rod assembly is respectively installed in the long holes on the two sides, and a telescopic rod assembly is arranged on each measuring rod assembly; the measuring rod assembly comprises a measuring rod, a compression spring, a spring seat, a gasket and two locking nuts; the lower end of the measuring rod is provided with an external thread, and the front side of the upper end of the measuring rod is provided with a scale line; the back side of the upper end of the measuring rod is provided with a toothed structure, and the middle part of the measuring rod is provided with a boss, and the boss is in contact with the The spring seat is used to fix the compression spring; the lower end of the measuring rod passes through the long hole of the horizontal base plate and is fixed to the horizontal base plate by a large washer and the two locking nuts; the telescopic rod assembly includes a sleeve, a switch shaft, a switch frame and a switch body; the lower end of the sleeve can be axially movably sleeved on the measuring rod and can move along the axis of the measuring rod, the tube body of the switch frame is fastened to the outer wall of the sleeve, the switch body is connected to the switch frame through the switch shaft, the switch body can rotate along the axial direction of the switch shaft and engage with the toothed structure on the measuring rod through the tube body of the switch frame and the opening on the sleeve.

[0005] Wherein, the long holes on both sides are symmetrical structures.

[0006] Wherein, supporting vertical plates are arranged at the bottoms of both ends of the horizontal base plate.

[0007] Wherein, a first limiting plate is arranged at the front left end of the horizontal base plate, and a second limiting plate is arranged at the rear right end of the horizontal base plate.

[0008] Wherein, a guide groove extending along the length direction of the guide groove is arranged on the front side of the upper end of the measuring rod, and the scale lines are arranged on both sides of the guide groove.

[0009] Wherein, a boss is provided on the inner wall of the sleeve and matches with the guide groove provided on the front side of the upper end of the measuring rod.

[0010] Wherein, every two tooth pitches are the length of one scale line.

[0011] Wherein, the telescopic rod assembly further includes a spring, a switch shield and a screw; the switch shield is fixed to the switch frame through the switch shaft and the screw, and the spring is installed between the switch body and the switch shield.

[0012] The tooth-shaped structure is composed of continuous arc surfaces.

[0013] Compared with the prior art, the chassis ground height measuring tool of the present invention has the following beneficial effects:

[0014] The measuring tool of the present invention can first adjust the height of the measuring rod according to the parameters of the vehicle model to be measured. When measuring, it is only necessary to move the measuring rod in the Y direction to the camshaft position and observe whether the top of the measuring rod coincides with the measuring point. Moreover, when adjusting the height of the chassis from the ground, there is no need to remove the tool, and the measurement can be carried out while adjusting, which is convenient to operate. Moreover, the verticality of the measuring rod and the ground can be ensured, and it can be calibrated by itself, thereby ensuring the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the appearance of the chassis ground height measuring tool of the present invention.

[0016] Figure 2 It is an exploded schematic diagram of the measuring rod assembly in the measuring tool structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the explosion and assembly of the telescopic rod assembly in the measuring tool structure of the present invention.

[0018] Figure 4 It is a cross-sectional view of the chassis ground height measurement tool structure of the present invention. DETAILED DESCRIPTION

[0019] The chassis ground height measuring tool of the present invention will be further described below in conjunction with specific embodiments to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0020] Example 1

[0021] like Figure 1-4 As shown, the chassis ground height measuring tool of this embodiment includes a base 10, a measuring rod assembly 20 and a telescopic rod assembly 30. The base 10 includes a horizontal base plate 11, and an oblong hole 12 extending along the Y direction is provided in the middle of both sides of the horizontal base plate 11. The oblong holes 12 on both sides are preferably symmetrical structures. The oblong holes 12 are used for the installation of the measuring rod assembly 20 and for Y-direction sliding according to the needs of the vehicle model. Support vertical plates 13 are provided at the bottom of both ends of the horizontal base plate 11 to ensure the stability of the tool when it is laid down. A first limit plate 14 is provided at the front of the left end of the horizontal base plate 11, and a second limit plate 15 is provided at the rear of the right end of the horizontal base plate 11 to prevent the base from falling into the pit.

[0022] The measuring rod assembly 20 includes a measuring rod 21, a compression spring 22, a spring seat 23, a gasket 24 and two locking nuts 25. The lower end of the measuring rod 21 is provided with an external thread 26, and the front of the upper end of the measuring rod 21 is provided with a guide groove 28, and scales are provided on both sides along the length direction of the guide groove 28. The back of the upper end of the measuring rod 21 is provided with a toothed structure 29, wherein every two tooth pitches are one scale, and taking a tooth pitch of 2.5 mm as an example, the distance between each scale is 2 tooth pitches, i.e., 5 mm. The middle part of the measuring rod 21 is provided with a boss 27, which fixes and guides the compression spring 22 together with the spring seat 23; the lower end of the measuring rod 21 passes through the oblong hole 12 of the horizontal substrate 11 and is fixed to the horizontal substrate 11 by a large washer 24 and the two locking nuts 25.

[0023] The telescopic rod assembly 30 is composed of a sleeve 31, a switch shaft 32, a switch frame 33, a switch body 34, a spring 35, a switch shield 36 and a screw 37. The lower end of the sleeve 31 is sleeved on the measuring rod 21 and can move along the axis of the measuring rod. The inner wall of the sleeve 31 is provided with a boss that matches the guide groove 28 provided on the front side of the upper end of the measuring rod 21, which guides the axial movement. The tube body of the switch frame 33 is fixed on the outer wall of the sleeve 31 and has no relative movement with the sleeve 31. The switch body 34 is connected to the switch frame 33 through the switch shaft 32. The switch body 34 can rotate axially along the switch shaft 32 and engage with the toothed structure on the measuring rod 21 through the tube body of the switch frame 33 and the opening on the sleeve 31 to achieve the opening and locking functions. The switch cover 36 is fixed to the switch frame 33 by the switch shaft 32 and the screw 37. The spring 35 is installed between the switch body 34 and the switch cover 36 to press the switch body 34.

[0024] The steps for using the chassis ground height measurement tool of this embodiment are as follows:

[0025] ① Adjust the tooling height according to the vehicle model to be adjusted: press the switch body to disengage the switch body from the rack, pull the switch frame upward (or downward) to a suitable position (the sleeve and the switch frame move synchronously), release the switch body, the switch body engages with the rack, and the switch body is locked;

[0026] ② The car drives to the set position of the pit and stops steadily;

[0027] ③ The operator places the tooling upright on the pit limit plate, presses down the compression spring 23 of the measuring rod assembly to leave a gap between the gasket 24 and the base, moves the measuring rod assembly in the Y direction to the appropriate position (the center position of the camshaft), and then releases the hand;

[0028] ④ Visually check whether the center position of the camshaft is level with the top of the sleeve 31, and adjust the chassis ground clearance to the designed state (adjust according to the vehicle structure, which is not described here);

[0029] ⑤Put the tooling down on the pit limit plate and the work is finished.

[0030] When in use, since the tooth surface of the rack is designed as an arc surface, when the switch stops at any position between the upper and lower limits, the rack can adaptively move to a position that meshes with the switch and lock.

[0031] The self-calibration method of the chassis ground height measurement tool in this embodiment is as follows: compare with the standard ruler. If there is a deviation, loosen the locking nut at the bottom and adjust the other locking nut (if the tool scale is larger than the ruler height, adjust the locking nut upwards to compress the spring, otherwise adjust it downwards). After the adjustment is completed, screw on the locking nut at the bottom.

[0032] For ordinary technicians in this field, the specific embodiments are only illustrative descriptions of the present invention. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A chassis ground height measurement tool, characterized in that include: Base, measuring rod assembly and telescopic rod assembly; The base comprises a horizontal base plate, a long hole extending along the Y direction is respectively arranged in the middle of two sides of the horizontal base plate, a measuring rod assembly is respectively installed in the long holes on both sides, and a telescopic rod assembly is arranged on each measuring rod assembly; the measuring rod assembly comprises a measuring rod, a compression spring, a spring seat, a gasket and two locking nuts; the lower end of the measuring rod is provided with an external thread, and the front of the upper end of the measuring rod is provided with a scale line; the back of the upper end of the measuring rod is provided with a toothed structure, and the middle part of the measuring rod is provided with a boss, and the boss and the spring seat are used to fix the compression spring; the lower end of the measuring rod passes through the long hole of the horizontal base plate and is fixed to the horizontal base plate by a large gasket and the two locking nuts; the telescopic rod assembly comprises a sleeve, a switch shaft, a switch skeleton and a switch body; the lower end of the sleeve An axially movable sleeve is mounted on the measuring rod and can move along the axis of the measuring rod. The tube body of the switch skeleton is fastened to the outer wall of the sleeve. The switch body is connected to the switch skeleton through a switch shaft. The switch body can rotate along the axial direction of the switch shaft and mesh with the toothed structure on the measuring rod through the tube body of the switch skeleton and the opening on the sleeve. A guide groove extending along the length direction of the guide groove is arranged on the front side of the upper end of the measuring rod, and the scale lines are arranged on both sides of the guide groove. A boss matching the guide groove arranged on the front side of the upper end of the measuring rod is arranged on the inner wall of the sleeve. The telescopic rod assembly also includes a spring, a switch shield and a screw. The switch shield is fixed to the switch skeleton through the switch shaft and the screw, and the spring is installed between the switch body and the switch shield.

2. The chassis ground height measuring tool according to claim 1, characterized in that: The long holes on both sides are symmetrical structures.

3. The chassis ground height measuring tool according to claim 1, characterized in that: Supporting vertical plates are arranged at the bottoms of both ends of the horizontal base plate.

4. The chassis ground height measuring tool according to claim 1, characterized in that: A first limiting plate is arranged at the front left end of the horizontal base plate, and a second limiting plate is arranged at the rear right end of the horizontal base plate.

5. The chassis ground clearance measuring tool according to claim 1, wherein every two tooth pitches are one scale line length.

6. The chassis ground height measuring tool according to claim 1, characterized in that: The tooth-shaped structure is composed of continuous arc surfaces.

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