Transmission shaft gap detection device for electric steering gear

Abstract

The utility model discloses a transmission shaft gap detection device for an electric steering gear, which comprises a transversely arranged base, one side of the base is provided with a longitudinally arranged first support, and the other side of the base is provided with a longitudinally arranged second support capable of transversely moving. A first fixing spline is arranged on the upper portion of the first support, a second fixing spline is arranged on the upper portion of the second support, a linkage pivot is arranged on the second support, a rotatable lever is arranged on the linkage pivot, a weight is hung at one end of the lever, and the weight is connected with the linkage pivot. The other end of the lever abuts against an ejector rod of a dial indicator. According to the transmission shaft gap detection device for the electric steering gear, different fixed splines can be replaced according to different types of transmission shafts, and the position of the second bracket 3 can be adjusted according to the transmission shafts with different sizes, so that the measurement length of the transmission shaft is met, the adaptability is high, and the gap detection efficiency of the transmission shaft for the electric steering gear is effectively improved.

Description

Technical Field

[0001] The utility model relates to a detection device for an electric steering gear, and more precisely, a device for detecting the clearance of a transmission shaft for an electric steering gear. Background Art

[0002] The size of the clearance between the intermediate transmission shaft connecting the electric steering column and the rack and pinion affects the quality of the product and the driver's handling feel of the vehicle. In the original Q / FD S5-42-2018 "Test Method Standard for Automotive Electric Steering Column with Intermediate Shaft Assembly", it is mentioned that for the steering shaft, when the torsional clearance is less than 30′, the test method is as follows: Fix the electric steering column with the intermediate shaft assembly on the test bench according to the vehicle angle. Rigidly fix the output end of the steering intermediate shaft, and connect the upper end to the steering wheel (or its substitute). Apply a torque of ±5 N·m at a maximum speed of 0.5° / s. Repeat the test three times. And record the torque-angle change curve during the third test. When the torque is T1 = ±1 Nm, measure the torsional angles of the two curves respectively, and take the maximum value among AA′ and BB′ as the torsional angle of the steering shaft. Measure the one-way curve parallel segment distances C1 and C2 respectively when the torques are ±3 N·m, and take the maximum value among them as the torsional clearance C. This detection method is relatively cumbersome and the detection efficiency is low. Summary of the Utility Model

[0003] Based on this, in view of the above technical problems, it is necessary to provide a device for detecting the clearance of a transmission shaft for an electric steering gear.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A device for detecting the clearance of a transmission shaft for an electric steering gear, characterized in that the device for detecting the clearance of a transmission shaft for an electric steering gear comprises a horizontally arranged base, a longitudinally arranged first bracket is provided on one side of the base, a longitudinally arranged second bracket that can move horizontally is provided on the other side of the base, a first fixed spline is provided on the upper part of the first bracket, a second fixed spline is provided on the upper part of the second bracket, a linkage pivot is provided on the second bracket, the linkage pivot is linked with the second fixed spline, a rotatable lever is provided on the linkage pivot, a weight is suspended at one end of the lever, and the other end of the lever abuts against the ejector rod of a dial indicator.

[0006] As a preferred embodiment of the utility model, a guide rail is provided on the base, and the second bracket is arranged on the guide rail.

[0007] As a preferred embodiment of the utility model, the second fixed spline is coaxially arranged with the first fixed spline.

[0008] As a preferred embodiment of the present utility model, the first fixed spline is fixedly connected to the first bracket, and the second fixed spline is connected to the second bracket by a thread.

[0009] As a preferred embodiment of the present utility model, the mass of the weight is 1 Kg.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] The present utility model provides a device for detecting the clearance of a drive shaft for an electric power steering gear. The device for detecting the clearance of the drive shaft for the electric power steering gear can replace different fixed splines according to different models of the drive shaft, and can also adjust the position of the second bracket 3 according to drive shafts of different sizes so as to meet the measuring length of the drive shaft, with strong adaptability and effectively improving the efficiency of detecting the clearance of the drive shaft for the electric power steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the solutions in the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of the device for detecting the clearance of the drive shaft for the electric power steering gear of the present utility model;

[0014] Figure 2 is Figure 1 a schematic structural diagram of the device for detecting the clearance of the drive shaft for the electric power steering gear in , and this is another perspective at this time;

[0015] The reference numerals in the drawings are explained as follows: 2, the first bracket; 21, the first fixed spline; 3, the second bracket; 31, the second fixed spline; 32, the linkage pivot; 4, the guide rail; 5, the lever; 6, the weight; 7, the dial indicator; 71, the ejector rod; 8, the base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model.

[0017] As shown in Figure 1 and Figure 2As shown in the figure, the device for detecting the clearance of the transmission shaft of the electric power steering gear includes a horizontally arranged base 8. On one side of the base 8, there is a vertically arranged first bracket 2. On the other side of the base 8, there is a vertically arranged second bracket 3 that can move horizontally. At the upper part of the first bracket 2, there is a first fixed spline 21. At the upper part of the second bracket 3, there is a second fixed spline 31. On the second bracket 3, there is a linkage pivot 32, which is linked with the second fixed spline 31. On the linkage pivot 32, there is a rotatable lever 5. At one end of the lever 5, there is a hanging weight 6. At the other end of the lever 5, it abuts against the ejector rod 71 of a dial indicator 7.

[0018] On the base 8, there is a guide rail 4, and the second bracket 3 is arranged on the guide rail 4.

[0019] It should be noted that the second fixed spline 31 is coaxially arranged with the first fixed spline 21. The first fixed spline 21 is fixedly connected with the first bracket 2, and the second fixed spline 31 is connected with the second bracket 3 by threads.

[0020] In addition, the mass of the weight 6 is 1 Kg.

[0021] The working mode of the device for detecting the clearance of the transmission shaft of the electric power steering gear will be described below, including the steps:

[0022] Step S1: Adjust the position of the second bracket 3 according to the length of the transmission shaft 1;

[0023] Step S2: Install the transmission shaft 1 between the first fixed spline 21 and the second fixed spline 31, and lock the transmission shaft 1 with bolts;

[0024] Step S3: Push the ejector rod 71 of the dial indicator 7 against the right end of the lever 5, and zero the dial indicator 7;

[0025] Step S4: Hang a 1-Kg weight 6 on the left end of the lever 5, and observe the reading A1 of the dial indicator 7 at this time;

[0026] Step S5: Hang a 1-Kg weight 6 on the right end of the lever 5, and observe the reading A2 of the dial indicator 7 at this time, and obtain the difference A = A2 - A1;

[0027] Step S6: Repeat the above steps three times, and substitute into the calculation formula: F = ATAN(A / 100)*180 / 3.14*60 (A is the difference in the lever displacement), where F is the clearance value of the transmission shaft.

[0028] The gap detection device for the drive shaft of the electric power steering gear can replace different fixed splines according to different models of the drive shaft, and can also adjust the position of the second bracket 3 according to drive shafts of different sizes so as to meet the measurement length of the drive shaft, with strong adaptability and effectively improving the gap detection efficiency of the drive shaft of the electric power steering gear.

[0029] Obviously, the embodiments described above are only a part rather than all of the embodiments of the present application. Preferred embodiments of the present application are shown in the drawings, but they do not limit the patent scope of the present application.

Claims

1. A transmission shaft clearance detection device for an electric steering gear, characterized in that: The transmission shaft clearance detection device for an electric steering gear comprises a transversely arranged base (8), a longitudinally arranged first bracket (2) is provided on one side of the base (8), a longitudinally arranged second bracket (3) movable transversely is provided on the other side of the base (8), a first fixed spline (21) is provided on the upper part of the first bracket (2), a second fixed spline (31) is provided on the upper part of the second bracket (3), a linkage pivot (32) is provided on the second bracket (3), the linkage pivot (32) is linked to the second fixed spline (31), a rotatable lever (5) is provided on the linkage pivot (32), a weight (6) is suspended at one end of the lever (5), and the other end of the lever (5) abuts against a top rod (71) of a micrometer (7).

2. The transmission shaft clearance detection device for an electric steering gear according to claim 1, characterized in that: A guide rail (4) is provided on the base (8), and the second bracket (3) is arranged on the guide rail (4).

3. The transmission shaft clearance detection device for an electric steering gear according to claim 1, characterized in that: The second fixed spline (31) is coaxially arranged with the first fixed spline (21).

4. The transmission shaft clearance detection device for an electric steering gear according to claim 1, characterized in that: The first fixed spline (21) is fixedly connected to the first bracket (2), and the second fixed spline (31) is connected to the second bracket (3) via a thread.

5. The transmission shaft clearance detection device for an electric steering gear according to claim 1, characterized in that: The mass of the weight (6) is 1 kg.

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