Benchmarking tool for rapidly measuring gap between pressing blocks by tooth pushing method

Abstract

The utility model relates to the technical field of machinery, in particular to a benchmarking tool for rapidly measuring a press block gap by a tooth pushing method, which comprises a tool main body, a lead screw, a profiling sleeve, a slide rail retainer, a slide block, a rack ejector rod, a pressure sensor and a connecting piece, a sliding rail which is vertically arranged is installed on the inner side of the sliding rail holder, a sliding block is connected with the sliding rail in a sliding mode, a pressure sensor is installed at the outer end of the sliding block, a rack ejector rod is embedded in the sliding block, a lead screw is installed at the other end of the tool body, one end of the lead screw is connected with the sliding block through a connecting piece, and a profiling sleeve is installed on the front side of the tool body. Compared with the prior art, the utility model ensures that the applied pressure is vertical to the rack through the vertically arranged slide rail, simulates the test state of the machine tool through the rack push rod and the pressure sensor, and conveniently, quickly and efficiently carries out the benchmarking measurement of the gap between the pressing blocks, so that the measurement methods of a production line and a laboratory are kept consistent.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a benchmarking tool for quickly measuring the gap between pressure blocks using the tooth-pushing method. Background Technology

[0002] With the development of the steering gear industry, electronic power steering gears are gradually moving towards higher torque, greater power assistance, and more redundancy.

[0003] With the changes in the structure of electronic power steering, the corresponding measurement specifications have also been adjusted accordingly. Initially, due to limited measurement conditions, the push-tooth method was used to measure the pressure block clearance on the production line, while the rotating-tooth method was used in the laboratory. While there is an approximate conversion relationship between the push-tooth and rotating-tooth methods, the laboratory requires specific bench fixtures tailored to the steering gear structure type to measure the pressure block clearance, which still cannot meet the goal of rapid and accurate measurement.

[0004] Currently, the tooth-pushing method generally uses the compression of a nitrogen spring to estimate the tooth-pushing force. However, as the spring's elastic coefficient changes with the number of uses, the tooth-pushing force becomes increasingly inaccurate, and the measurement error of the pressure block gap becomes larger and larger.

[0005] Therefore, it is necessary to design a benchmarking fixture for rapid measurement of the gap between pressure blocks using the tooth-pushing method, so that the measurement method of the production line is consistent with that of the laboratory, thereby improving the efficiency and accuracy of the measurement. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a benchmarking tool for quickly measuring the gap of pressure blocks using the tooth-pushing method, so that the measurement method of the production line is consistent with that of the laboratory, thereby improving the efficiency and accuracy of the measurement.

[0007] To achieve the above objectives, this utility model provides a benchmarking fixture for rapidly measuring the gap of pressure blocks using a toothed method. The fixture includes a main body, a lead screw, a contour sleeve, a slide rail retainer, a slider, a rack and pinion, a pressure sensor, and connecting parts. A slide rail retainer is installed at one end of the main body, with a vertically arranged slide rail installed on the inner side of the retainer. The slider is slidably connected to the slide rail. A pressure sensor is installed at the outer end of the slider. A rack and pinion is embedded inside the slider, with one end of the rack and pinion in contact with the measuring end of the pressure sensor. The other end of the rack and pinion is located within the inner cavity of the main body. A lead screw is installed at the other end of the main body, with one end connected to the slider via a connecting part. A contour sleeve is installed on the front side of the main body, communicating with the inner cavity of the main body.

[0008] A crank handle is installed at the other end of the lead screw.

[0009] One end of the connector is mounted on the side of the slider, and the other end of the connector is threadedly connected to the lead screw.

[0010] The shape of the contour sleeve matches the shape of the housing bore of the steering gear short assembly.

[0011] The contour sleeve is inserted into the housing hole of the steering gear short assembly. After the end of the rack passes through the contour sleeve, it is located in the inner cavity of the tooling body. The other end of the rack push rod abuts against the side of the end of the rack.

[0012] Compared with the prior art, this utility model ensures that the applied pressure is perpendicular to the rack by using a vertically set slide rail. Through the rack push rod and pressure sensor, it simulates the test state of the machine tool, making it convenient, fast and efficient to measure the gap of the pressure block. This ensures that the measurement method of the production line is consistent with that of the laboratory. This utility model is easy and quick to assemble and disassemble, and can be adapted to different types of steering gears by changing the conformal sleeve. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is an exploded view of the present invention.

[0015] Figure 3 This is a cross-sectional view of the present invention.

[0016] Figure 4 This is a schematic diagram showing the usage state of this utility model.

[0017] Figure 5 This is a cross-sectional view of the present invention in use. Detailed Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] See Figure 1 , Figure 2 and Figure 3 This utility model is a benchmarking fixture for quickly measuring the gap of pressure blocks using the tooth-pushing method. It includes a fixture body 3, a lead screw, a contour sleeve, a slide rail retainer, a slider, a rack and pinion, a pressure sensor, and a connector. A slide rail retainer 4 is installed at one end of the fixture body 3. A vertically arranged slide rail is installed on the inner side of the slide rail retainer 4. The slider 6 is slidably connected to the slide rail. A pressure sensor 7 is installed at the outer end of the slider 6. A rack and pinion 5 is embedded inside the slider 6. One end of the rack and pinion 5 is in contact with the measuring end of the pressure sensor 7. The other end of the rack and pinion 5 is located in the inner cavity of the fixture body 3. A lead screw 1 is installed at the other end of the fixture body 3. One end of the lead screw 1 is connected to the slider 6 by a connector 9. A contour sleeve 2 is installed on the front side of the fixture body 3. The contour sleeve 2 is connected to the inner cavity of the fixture body 3.

[0020] The other end of the lead screw 1 is equipped with a crank handle 8, which makes it easy to apply thrust in a uniform and cyclical manner by hand.

[0021] One end of the connector 9 is mounted on the side of the slider 6, and the other end of the connector 9 is threadedly connected to the lead screw 1.

[0022] The shape of the contour sleeve 2 matches the shape of the housing hole of the steering gear short assembly 11. By replacing the contour sleeve 2 with different shapes, it can be adapted to different types of steering gears.

[0023] The slide rail and slider 6 are designed to ensure that the rack push rod 5 moves smoothly, thereby ensuring that the force applied by the rack push rod 5 is perpendicular to the rack 10.

[0024] See Figure 4 , Figure 5 In operation, the contour sleeve 2 is manually inserted into the housing hole of the steering gear short assembly 11, with the direction horizontal to the adjusting nut. After the end of the rack 10 passes through the contour sleeve 2, it is located in the inner cavity of the tooling body 3. The crank handle 8 is turned clockwise, which drives the slider 6 to slide along the slide rail through the lead screw 1 and connecting piece 9. The rack push rod 5 gradually approaches the rack 10. Before the rack push rod 5 contacts the rack 10, the calibrated pressure sensor 7 is manually zeroed. The crank handle 8 is turned clockwise again, and the other end of the rack push rod 5 abuts against the end side of the rack 10, completely simulating the machine tool test state. The rack and pinion rod 5 transmits the pushing force to the pressure sensor 7. The pressure sensor 7 displays the current pushing force in real time through the display screen or an external display device. After the pushing force reaches the specified requirements, the external pressure block gap measuring displacement sensor is manually zeroed. Turn the crank handle 8 counterclockwise to release the pushing force until the pressure sensor 7 displays a value of 0. Read the value of the external pressure block gap measuring displacement sensor, which is the current pressure block gap value.

[0025] This invention can meet different tooth-pushing force output requirements, and the tooth-pushing force data can be visualized through a display screen or an external display device.

[0026] This invention facilitates equipment restart assessment, NVH analysis, and process quality control, thereby reducing the risk of NVH abnormal noises and improving customer satisfaction.

[0027] This invention uses a vertically arranged slide rail to ensure that the applied pressure is perpendicular to the rack. Through the rack push rod and pressure sensor, it simulates the test state of a machine tool, making it convenient, quick and efficient to measure the gap between the pressure blocks. This ensures that the measurement methods on the production line are consistent with those in the laboratory. This invention is easy and quick to assemble and disassemble, and can be adapted to different types of steering gears by changing the contour sleeve.

Claims

1. A calibration fixture for rapidly measuring the gap of pressure blocks using a toothed pusher method, comprising a fixture body, a lead screw, a contour sleeve, a slide rail retainer, a slider, a rack and pinion, a pressure sensor, and connecting parts, characterized in that: A slide rail retainer (4) is installed at one end of the tooling body (3). A vertically arranged slide rail is installed on the inner side of the slide rail retainer (4). The slider (6) is slidably connected to the slide rail. A pressure sensor (7) is installed at the outer end of the slider (6). A rack and pinion rod (5) is embedded inside the slider (6). One end of the rack and pinion rod (5) is in contact with the measuring end of the pressure sensor (7). The other end of the rack and pinion rod (5) is located in the inner cavity of the tooling body (3). A lead screw (1) is installed at the other end of the tooling body (3). One end of the lead screw (1) is connected to the slider (6) by a connector (9). A contour sleeve (2) is installed on the front side of the tooling body (3). The contour sleeve (2) is connected to the inner cavity of the tooling body (3).

2. The calibration fixture for rapid measurement of pressure block gap using the tooth-pushing method according to claim 1, characterized in that: A crank handle (8) is installed at the other end of the lead screw (1).

3. The calibration fixture for rapid measurement of the gap between pressure blocks using the tooth-pushing method according to claim 1, characterized in that: One end of the connector (9) is mounted on the side of the slider (6), and the other end of the connector (9) is threaded to the lead screw (1).

4. The calibration fixture for rapid measurement of the gap between pressure blocks using the tooth-pushing method according to claim 1, characterized in that: The shape of the contour sleeve (2) matches the shape of the housing hole of the steering gear short assembly (11).

5. A calibration fixture for rapidly measuring the gap of pressure blocks using the tooth-pushing method according to claim 1, characterized in that: The contour sleeve (2) is inserted into the housing hole of the steering gear short assembly (11). After the end of the rack (10) passes through the contour sleeve (2), it is located in the inner cavity of the tooling body (3). The other end of the rack push rod (5) abuts against the side of the end of the rack (10).

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