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CN-121994516-A - Moment performance test method for steering gear pull rod assembly

CN121994516ACN 121994516 ACN121994516 ACN 121994516ACN-121994516-A

Abstract

The application discloses a steering gear pull rod assembly moment performance test method which comprises the following steps of S1, installing a steering gear pull rod assembly on a test device, S2, driving the steering gear pull rod assembly to move along a set direction to simulate actual steering working conditions, S3, collecting moment data of the pull rod assembly in the moving process through the test device, and S4, processing and analyzing the collected moment data by the test device according to a preset moment performance index to evaluate whether moment performance of the steering gear pull rod assembly is qualified or not. The application realizes the full automation of the test process through the test device, does not need manual intervention from bidirectional driving and data acquisition to result judgment, remarkably improves the test efficiency and operation consistency, and is particularly suitable for the rapid detection of a production line.

Inventors

  • WU LIANGYONG

Assignees

  • 绍兴耐柯尔汽车配件有限公司

Dates

Publication Date
20260508
Application Date
20260114

Claims (10)

  1. 1. The method for testing the moment performance of the steering gear pull rod assembly is characterized by comprising the following steps of: S1, mounting a steering gear pull rod assembly on a testing device; S2, driving the steering gear pull rod assembly to move along a set direction, and simulating an actual steering working condition; s3, acquiring moment data of the pull rod assembly in the motion process through the testing device; and S4, the testing device processes and analyzes the collected moment data according to a preset moment performance index, and evaluates whether the moment performance of the steering gear pull rod assembly is qualified or not.
  2. 2. The method for testing the moment performance of the steering gear pull rod assembly according to claim 1, wherein the testing device comprises a testing platform (1), a fixing part (2), a monitoring part (3), a testing part (4), a driving component (5) and a control unit (6), and the fixing part (2), the monitoring part (3), the testing part (4), the driving component (5) and the control unit (6) are all installed on the testing platform (1); One end of the fixing part (2), the monitoring part (3) and the testing part (4) on the testing platform (1) is distributed to the other end in sequence; the monitoring part (3) and the testing part (4) are driven by a driving component (5); the driving assembly (5) and the monitoring part (3) are electrically connected with the control unit (6).
  3. 3. The method for testing the moment performance of the steering gear pull rod assembly according to claim 2, wherein the fixing part (2) comprises a fixing seat (201) with a groove at the top, a fixing piece (202), an elastic piece (203), a threaded rod (204) and a rotating handle (205); The fixing seat (201) and the test platform (1) are detachably arranged; the two opposite ends in the groove of the fixed seat (201) are respectively provided with a fixed piece (202) and an elastic piece (203), and the fixed piece (202) is fixedly connected with the fixed seat (201); A threaded rod (204) is arranged on one side, far away from the fixing piece (202), of the elastic piece (203), the elastic piece (203) is rotationally connected with one end of the threaded rod (204), the other end of the threaded rod (204) penetrates through the fixing seat (201), and the threaded rod (204) is in threaded rotation fit with the fixing seat (201); one end of a threaded rod (204) positioned at the outer side of the fixed seat (201) is fixed with a rotating handle (205).
  4. 4. The method for testing the moment performance of the steering gear pull rod assembly according to claim 3, wherein the monitoring part (3) comprises a limit rod (301), a lifting rod (302), a rotating sleeve (303), a sliding block (304), a first sliding groove (305), a second sliding groove (306), a first ranging sensor (307), a second ranging sensor (308) and an electromagnetic switch (309), one end of the limit rod (301) is fixedly connected with the test platform (1), the lifting rod (302) is sleeved outside the limit rod (301), and the lifting rod (302) is in sliding fit with the limit rod (301); The lifting device is characterized in that a rotating sleeve (303) is sleeved outside the lifting rod (302), a sliding block (304) is fixed on the surface of the lifting rod (302), a first sliding groove (305) and a second sliding groove (306) are formed in the inner wall of the rotating sleeve (303), the first sliding groove (305) and the second sliding groove (306) are spiral, the first sliding groove (305) and the second sliding groove (306) are arranged in a staggered mode, the lifting rod (302) is in an ascending state and a retracting state in the rotating sleeve (303) through the sliding block (304), the first sliding groove (305) and the second sliding groove (306), and the rotating sleeve (303) is in running fit with the test platform (1); the first distance measuring sensor (307) and the second distance measuring sensor (308) are respectively arranged at two sides of the top end of the lifting rod (302); the electromagnetic switch (309) is located between the lifting rod (302) and the test platform (1), a static contact of the electromagnetic switch (309) is fixedly connected with the test platform (1), and a movable contact of the electromagnetic switch (309) is fixedly connected with the lifting rod (302).
  5. 5. The method for testing the moment performance of the steering gear pull rod assembly according to claim 4, wherein the testing part (4) comprises an arc-shaped track (401), a rack (402), a chute (403) and a placing rack (404), the concave surface of the track (401) faces one side of the fixing part (2), and the track (401) is fixedly connected with the testing platform (1); The rack (402) is arranged on the inner side of the track (401), the rack (402) is matched with the track (401) in shape, the rack (402) is in sliding fit with the track (401), a sliding groove (403) is formed in the upper portion of the track (401), and the shape of the sliding groove (403) is matched with the track (401); The middle section of rack (402) upper portion is fixed rack (404), rack (404) are through rack (402) and track (401) sliding fit in spout (403).
  6. 6. The method for testing the moment performance of the steering gear pull rod assembly according to claim 5, wherein the driving component (5) comprises a motor (501), a gear (502) and a conveyor belt (503), and the motor (501) is fixedly connected with the testing platform (1); a gear (502) is fixed at the rotating end of the motor (501), and the gear (502) is meshed with the rack (402); A conveyor belt (503) is sleeved between the rotating end of the motor (501) and the rotating sleeve (303).
  7. 7. The method for testing the moment performance of the steering gear pull rod assembly according to claim 6, wherein a plurality of teeth (7) are circumferentially and uniformly arranged on the outer surface of the rotary sleeve (303), and the teeth (7) are fixedly connected with the rotary sleeve (303); the conveyor belt (503) is divided into a smooth section and a rough section, a plurality of notches (8) are linearly and uniformly formed in the inner side of the rough section, and the notches (8) are meshed with teeth (7).
  8. 8. The method for testing the moment performance of the steering gear pull rod assembly according to claim 4, wherein a spring (9) is arranged between the lifting rod (302) and the test platform (1), and two ends of the spring (9) are fixedly connected with the lifting rod (302) and the test platform (1) respectively.
  9. 9. The steering gear tie rod assembly torque performance test method according to claim 7, characterized in that the control unit (6) is configured to execute control logic comprising the steps of: Controlling the driving component (5) to start, and driving the testing part (4) to drive the pull rod part of the steering gear pull rod assembly to move along a first direction; when a first disconnection signal from the electromagnetic switch (309) is received, determining that the lifting rod (302) has risen to the top end, and starting to collect first distance data of the first distance measuring sensor (307) and moment data corresponding to the first direction; Calculating a first angular displacement of the pull rod part based on the first distance data, and generating a first moment-angle relation curve by combining moment data of the first direction; After the first direction test is completed, controlling the driving assembly (5) to rotate reversely, driving the pull rod part to return to an initial position and then moving along a second direction; When receiving a second disconnection signal from the electromagnetic switch (309), determining that the lifting rod (302) rises to the top end again, and starting to collect second distance data of the second distance measuring sensor (308) and moment data corresponding to the second direction; Calculating a second angular displacement of the pull rod portion based on the second distance data, and generating a second moment-angle relationship curve in combination with moment data of the second direction; And respectively comparing the first moment-angle relation curve with the second moment-angle relation curve with a preset moment performance index for analysis, and comprehensively evaluating whether the bidirectional moment performance of the steering gear pull rod assembly is qualified or not.
  10. 10. The method for testing the moment performance of a steering gear pull rod assembly according to claim 9, wherein the testing device further comprises an operation panel (10) and an alarm (11) which are electrically connected with the control unit (6); The operation panel (10) and the alarm (11) are both installed on the test platform (1), and the operation panel (10) and the alarm (11) are both electrically connected with the controller.

Description

Moment performance test method for steering gear pull rod assembly Technical Field The invention relates to the technical field of moment testing of steering gear assemblies, in particular to a method for testing moment performance of a steering gear pull rod assembly. Background The steering gear pull rod assembly is used as a key component of an automobile steering system, and the moment performance of the steering gear pull rod assembly is directly related to steering feel, aligning characteristics and running safety. In the production, manufacturing and quality detection links, the moment characteristics of the product in the process of simulating steering swing must be accurately tested so as to ensure that the product meets the design requirements. The Chinese patent publication No. CN105352748B discloses a method for testing the moment performance of a steering gear pull rod assembly, which comprises the steps of manually stirring a pull rod body to enable the pull rod body to swing back and forth after the positioning of the pull rod assembly is completed on a testing tool, observing a moment value corresponding to a recorded scale plate, repeating for a plurality of times, and taking an average value as a testing result. The method mainly obtains a moment average value under a specific swing angle, and is difficult to continuously obtain a moment change curve in the whole swing process with high resolution, so that dynamic characteristics such as smoothness, symmetry and the like of moment along with angle change cannot be comprehensively reflected. Disclosure of Invention The invention aims to provide a steering gear pull rod assembly moment performance testing method and a special device which have higher automation degree, can realize whole-course continuous data synchronous acquisition and can objectively and efficiently evaluate moment dynamic performance, so as to improve testing precision, consistency and production efficiency. In order to achieve the above purpose, the present invention provides the following technical solutions: a method for testing moment performance of a steering gear pull rod assembly comprises the following steps: S1, mounting a steering gear pull rod assembly on a testing device; S2, driving the steering gear pull rod assembly to move along a set direction, and simulating an actual steering working condition; s3, acquiring moment data of the pull rod assembly in the motion process through the testing device; and S4, the testing device processes and analyzes the collected moment data according to a preset moment performance index, and evaluates whether the moment performance of the steering gear pull rod assembly is qualified or not. The testing device comprises a testing platform, a fixing part, a monitoring part, a testing part, a driving component and a control unit, wherein the fixing part, the monitoring part, the testing part, the driving component and the control unit are all arranged on the testing platform; the fixing part, the monitoring part and the testing part are sequentially distributed from one end to the other end on the testing platform; The monitoring part and the testing part are driven by a driving assembly; The driving assembly and the monitoring part are electrically connected with the control unit. The fixing part comprises a fixing seat with a groove at the top, a fixing piece, an elastic piece, a threaded rod and a rotating handle; the fixing seat and the test platform are detachably arranged; The two opposite ends in the fixed seat groove are respectively provided with a fixing piece and an elastic piece, and the fixing piece is fixedly connected with the fixed seat; the side, far away from the fixing piece, of the elastic piece is provided with a threaded rod, the elastic piece is rotationally connected with one end of the threaded rod, the other end of the threaded rod penetrates through the fixing seat, and the threaded rod is in threaded rotation fit with the fixing seat; One end of the threaded rod positioned at the outer side of the fixed seat is fixed with a rotating handle. The monitoring part comprises a limit rod, a lifting rod, a rotary sleeve, a sliding block, a first sliding chute, a second sliding chute, a first distance measuring sensor, a second distance measuring sensor and an electromagnetic switch, wherein one end of the limit rod is fixedly connected with the test platform, the lifting rod is sleeved outside the limit rod, and the lifting rod is in sliding fit with the limit rod; The lifting rod is sleeved with a rotary sleeve outside, a sliding block is fixed on the surface of the lifting rod, a first sliding groove and a second sliding groove are formed in the inner wall of the rotary sleeve, the first sliding groove and the second sliding groove are spiral, the first sliding groove and the second sliding groove are arranged in a staggered mode, the lifting rod has two states of ascending and retracting in the rotary sle