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CN-115524116-B - Testing device for differential of gearbox

CN115524116BCN 115524116 BCN115524116 BCN 115524116BCN-115524116-B

Abstract

The invention discloses a testing device for a differential of a gearbox, which belongs to the technical field of differential tests and comprises a fixed tool, wherein the differential is installed at the top of the fixed tool through a mounting frame in a pressing manner, the differential further comprises an input shaft arranged right in front of the differential and output half shafts arranged on the left side and the right side, limiting rings and splines are fixedly sleeved on the outer surfaces of the output half shafts and the input shaft, connectors are connected to the outer surfaces of the splines in an adapting manner, a torque rotation speed sensor and a test motor are respectively fixedly connected to the output half shafts and the input shaft through the connectors, and the test boxes are respectively arranged on the left side and the right side of the fixed tool. According to the invention, the turntable is driven to rotate by the compression of the second spring to the limit in cooperation with the movable plate, the load of the vehicle in the running process in a real scene is simulated by the friction fit of the second spring and the friction arc plate, and the real load condition of the differential is effectively simulated by the movable belt and the static belt, so that the test precision is improved.

Inventors

  • WANG HUIQING
  • XU JIANMING
  • LI MINGDE

Assignees

  • 江苏飞达安全装备科技有限公司

Dates

Publication Date
20260505
Application Date
20220810

Claims (8)

  1. 1. The utility model provides a differential test device for gearbox, includes fixed frock (1), differential mechanism (3) are installed through mounting bracket (2) pressfitting in the top of fixed frock (1), differential mechanism (3) still including setting up input shaft (5) in the dead ahead and setting up output semi-axis (4) in the left and right sides, wherein, the surface of output semi-axis (4) and input shaft (5) is all fixed cup joint spacing ring (8) and spline (20), the surface adaptation joint of spline (20) has connector (6), output semi-axis (4) and input shaft (5) are respectively through connector (6) fixedly connected with moment of torsion rotational speed sensor (9) and test motor (7), the left and right sides of fixed frock (1) all is provided with test chamber (10), the inner wall rotation of test chamber (10) is installed connection pad (11) and support column (13), the surface fixation of support column (13) cup joints carousel (14) and support frame (15), the top movable joint of test chamber (10) has connection pad (12), support frame (16) are equipped with balancing weight (16) and are opened to one side of the fixed slot (17), the upper side fixedly connected with fixed plate (18) of standing groove (17) inner wall, the front fixedly connected with No. two springs (21) of fixed plate (18), the other end elastic connection of No. two springs (21) has fly leaf (19), fly leaf (19) and carousel (14) fixed connection.
  2. 2. The testing device for the differential of the gearbox, as set forth in claim 1, wherein the turntable (14) is fixedly sleeved at the middle part of the outer surface of the supporting column (13), the supporting frame (15) is fixedly sleeved at one side of the supporting column (13) positioned at the inner cavity of the testing box (10), and the front side and the rear side of the supporting frame (15) are in adaptive extrusion contact with the inner wall of the testing box (10).
  3. 3. The testing device for the differential of the gearbox of claim 1, wherein the connector (6) comprises a connecting outer cylinder (61), a clamping groove (64) is formed in one end, facing towards the output half shaft (4), of the connecting outer cylinder (61), a connecting column (62) and a first spring (63) are movably sleeved in the inner portion, facing away from the output half shaft (4), of one end of the connecting outer cylinder (61), the connecting column (62) is elastically supported in the connecting outer cylinder (61) through the first spring (63), the connecting outer cylinder (61) is fixedly connected with the torque rotation speed sensor (9), the connecting outer cylinder (61) located on the front face is fixedly connected with an output shaft of the testing motor (7), and the spline (20) is in fit and clamped in the clamping groove (64).
  4. 4. A differential test device for a transmission case according to claim 1, wherein the fixed plate (18) and the movable plate (19) have the same longitudinal sectional shape and size, the movable plate (19) is positioned at the bottom of the inner wall of the placement groove (17), the second spring (21) is arranged between the fixed plate (18) and the movable plate (19) in a compressed manner, and the width value of the movable plate (19) is larger than that of the fixed plate (18).
  5. 5. A differential test device for a transmission case according to claim 1, wherein the friction arc plate (16) is in a circular arc shape with a concave surface facing vertically downwards, the diameter of the friction arc plate (16) is equal to the diameter of the turntable (14), and the bottom of the friction arc plate (16) is in pressing contact with the outer surface of the turntable (14).
  6. 6. The testing device for a differential of a transmission case according to claim 1, wherein the top of said weight frame (12) has a portal-like longitudinal cross-section, and the front-rear distance of the inner wall of said weight frame (12) is equal to the diameter of the test case (10).
  7. 7. The testing device for the differential of the gearbox, which is disclosed in claim 1, is characterized in that the left side and the right side of the top of the fixed tool (1) are provided with supporting grooves (22), and the two output half shafts (4) are rotatably supported in the supporting grooves (22) and are pressed and mounted on the inner wall of the fixed tool (1) through mounting frames (2).
  8. 8. The testing device for the differential of the gearbox, as set forth in claim 1, is characterized in that the cross section of the connecting disc (11) is T-shaped, and a gap of 20-30 MM is reserved between one side of the connecting disc (11) facing the supporting frame (15) and the supporting frame (15).

Description

Testing device for differential of gearbox Technical Field The invention relates to the technical field of differential mechanism tests, in particular to a differential mechanism test device for a gearbox. Background The differential mechanism of the gearbox is a mechanism for realizing different rotation speeds of left and right wheels of an automobile and mainly comprises a planetary gear, a half shaft and a gear rack, when the automobile turns, the differential mechanism can avoid wheel slip and abrasion due to different turning radiuses of the left and right wheels and can play a role in balancing and distributing torque, the differential mechanism is an important component part of the automobile, the differential mechanism needs to be tested after being designed and molded and mainly comprises torque transmission, rotation speed transmission and the like, wherein the torque transmission test is an extremely important ring, and determines the connection performance of the differential mechanism. At present, three motors are generally adopted to be respectively connected with an input shaft and two output half shafts of a differential, torque transmission effect of the differential is tested by setting a driving mode and a loading mode, the differential is a mainstream test method, chinese patent application No. CN114486244A discloses a differential test device of a passenger car gearbox, the direct connection with the vehicle gearbox is avoided through a tooling structure, the limitation of the gearbox assembly is avoided, meanwhile, three motors are utilized, the driving mode and the loading mode are set to simulate the torque test under a real scene, and the reliability of the test is improved. The test device has the following defects that the load form of the connection of the two half shafts is single, after the input shaft receives power, the half shafts of the differential mechanism also rotate through the two motors connected with the two half shafts, torque transmission is carried out by utilizing the rotating speed difference, so that a test scene is limited, for example, a scene of starting and turning of a vehicle cannot be simulated, when the half shafts output power, the load formed by the motors connected with the half shafts cannot naturally generate a static-rotating state, the test data is incomplete, and the shaft parts are easily damaged due to electric faults and the test process is damaged by utilizing the rotating speed difference of the motors to carry out torque test. Accordingly, the present invention has been made in an effort to solve the above-mentioned problems and to provide a completely new testing device for a differential of a transmission. Disclosure of Invention The invention aims to provide a differential testing device for a gearbox, which aims to solve the problems of small testing range and low precision in the background technology. The differential testing device for the gearbox comprises a fixed tool, wherein the differential is mounted at the top of the fixed tool through a mounting frame in a pressing mode, the differential is further provided with an input shaft arranged right in front of the differential and output half shafts arranged on the left side and the right side, limiting rings and splines are fixedly sleeved on the outer surfaces of the output half shafts and the input shaft, connectors are fixedly connected to the outer surfaces of the splines in an adapting mode, torque rotation speed sensors and test motors are fixedly connected to the output half shafts and the input shaft through the connectors respectively, test boxes are arranged on the left side and the right side of the fixed tool respectively, connecting discs and supporting columns are rotatably mounted on the inner walls of the test boxes, rotating discs and supporting frames are fixedly sleeved on the outer surfaces of the supporting columns, a counterweight frame is movably sleeved on the top of the test boxes, a friction arc plate is fixedly connected to the bottom of the counterweight frame, a placing groove is formed in one side of the connecting disc, a fixing plate is fixedly connected to the upper side of the inner wall of the placing groove, a second spring is fixedly connected to the other end of the fixing plate, a movable plate is movably connected to the front face of the second spring, and the movable plate is movably connected to the rotating disc. As a further scheme of the invention, the turntable is fixedly sleeved in the middle of the outer surface of the supporting column, the supporting frame is fixedly sleeved on one side of the supporting column, which is positioned in the inner cavity of the test box, and the front side and the rear side of the supporting frame are in adaptive extrusion contact with the inner wall of the test box. As a further scheme of the invention, the connector comprises a connecting outer cylinder, a clamping groove is formed in one end, fa