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CN-120778402-B - Damping force testing device of shock absorber

CN120778402BCN 120778402 BCN120778402 BCN 120778402BCN-120778402-B

Abstract

The invention relates to the technical field of shock absorber testing, in particular to a shock absorber damping force testing device which comprises a testing base, a fixing frame, a fixed supporting plate, a pressure sensor, a hydraulic cylinder, a sliding block, a displacement sensor, a movable frame, a limiting assembly, an auxiliary assembly and a plug-in assembly, wherein the four movable frames are arranged on the surface of the testing base in parallel in pairs, the middle two movable frames are fixedly attached, and the bottom of the middle two movable frames are attached to the surface of the sliding block. According to the invention, the diameter of the cylindrical barrel playing a role of the inserting shaft is set smaller, after the cylindrical barrel is inserted into the mounting hole at the end part of the shock absorber, the end part of the shock absorber pushes the auxiliary assembly to move so that the inserting assembly is further unfolded, and the mode of horizontally placing the shock absorber is adopted, so that the problems that in the prior art, the testing efficiency is low due to the fact that the diameter of the inserting shaft is consistent with the diameter of the mounting hole, and the inserting shaft cannot form stable connection with the shock absorber to cause damage to the end part of the shock absorber due to the fact that the diameter of the inserting shaft is smaller than the diameter of the mounting hole are solved.

Inventors

  • SHI LEI
  • Hu Fengcui
  • LI YULAN

Assignees

  • 扬中市兴鸿车辆配件有限公司

Dates

Publication Date
20260512
Application Date
20250822

Claims (7)

  1. 1. The damping force testing device for the shock absorber comprises a testing base (1), a fixing frame (2), a fixed supporting plate (3), a pressure sensor (4), a hydraulic cylinder (5) and a sliding block (6), and is characterized by further comprising a displacement sensor (7), a moving frame (8), a limiting component (9), an auxiliary component (10) and a plug-in component (11), wherein the four moving frames (8) are arranged on the surface of the testing base (1) in a parallel mode, the middle two moving frames (8) are fixedly attached, the bottoms of the middle two moving frames (8) are attached to the surface of the sliding block (6), the displacement sensor (7) is mounted between the two moving frames (8) in the middle and close to one side of the fixing frame (2), the limiting component (9) is mounted between the two moving frames (8) with gaps, the limiting component (9) extends to one side of the fixing frame (2), the auxiliary component (10) is connected with the limiting component (9) in a sliding mode, the plug-in component (11) is mounted at the end portion, close to one side of the fixing frame (2), the plug-in component (11) is inserted into an end portion mounting hole of the shock absorber, the two moving frames (8) are driven to move towards the side of the fixing frame (8), the hydraulic cylinder (8) is pushed to move towards the side of the auxiliary frame (8), the auxiliary assembly (10) provides power input for the plug assembly (11) through the limiting assembly (9), and the plug assembly (11) is gradually unfolded until the axis of the plug assembly (11) is coincident with the center of a mounting hole at the end part of the shock absorber; Limiting component (9) are including fixed plate (91), separation blade (92), first gear (93) and drive gear case (94), fixed plate (91) are installed between two removal frame (8), perforation (911) have been seted up to fixed plate (91) lateral wall, separation blade (92) laminating is installed in perforation (911), first gear (93) rotate and set up inside fixed plate (91), drive gear case (94) are installed between fixed plate (91) and one of them removal frame (8) that are located the centre, and are provided with the gear train of being connected with first gear (93) transmission in drive gear case (94).
  2. 2. The device for testing the damping force of the shock absorber according to claim 1, wherein the auxiliary assembly (10) comprises a tooth groove (101), a penetrating rod (102), a return spring (103), a fitting plate (104) and a sliding plate (105), the tooth groove (101) is formed in one side, close to the first gear (93), of the penetrating rod (102), the tooth groove is connected with the first gear, the penetrating rod (102) is slidably connected with the fixed plate (91), the penetrating rod (102) is matched with the penetrating hole (911), the return spring (103) is arranged between the baffle plate (92) and the penetrating rod (102), the fitting plate (104) is arranged at the end part of the penetrating rod (102), and the sliding plate (105) is slidably arranged on the side wall of the fitting plate (104).
  3. 3. The device for testing the damping force of a shock absorber according to claim 2, wherein the surface of the penetrating rod (102) is provided with a containing groove (1021) and a vertical groove (1023), the containing groove (1021) is used for containing a return spring (103), a side plate (1022) is attached between the vertical grooves (1023), and the side wall of the side plate (1022) is flush with the end part of the penetrating rod (102).
  4. 4. The device for testing the damping force of the shock absorber according to claim 2, wherein the side wall of the attaching plate (104) is arc-shaped, a limit groove (1041) matched with the sliding plate (105) is formed in one side, close to the fixed frame (2), of the attaching plate (104), an extension strip (1051) penetrating through the attaching plate (104) is connected to the side wall of the sliding plate (105), and the extension strip (1051) and the penetrating rod (102) are arranged in a staggered mode.
  5. 5. The device for testing the damping force of the shock absorber according to claim 1, wherein the plug-in assembly (11) comprises a cylindrical drum (111), a straight through groove (112), a conical seat (113), a threaded rod (114), a tightening block (115), an extension shaft (116), a second gear (117) and a moving disc (118), wherein the cylindrical drum (111) is fixed at the end of the transmission gear box (94), a plurality of the straight through grooves (112) are distributed in an annular array with respect to the axis of the cylindrical drum (111), the conical seat (113) is mounted at one end of the cylindrical drum (111) far away from the transmission gear box (94), the threaded rod (114) is rotatably connected with the conical seat (113), the threaded rod (114) extends into the cylindrical drum (111), the tightening block (115) is rotatably arranged in the straight through groove (112), the extension shaft (116) is connected at the end of the threaded rod (114), the end of the extension shaft (116) extends into the transmission gear box (94), the second gear (117) is mounted at the end of the long shaft (116), and the second gear (117) is meshed with the threaded rod (94) in the moving disc (118).
  6. 6. The device for testing the damping force of a shock absorber according to claim 5, wherein the side view of the abutting block (115) is right trapezoid, the right-angle side of the abutting block (115) away from the second gear (117) is short side, and a chute (1151) is formed on the abutting block (115) side close to the threaded rod (114).
  7. 7. The device for testing the damping force of a shock absorber according to claim 6, wherein a protrusion (1181) is integrally formed on the outer circumference of the movable plate (118), and the protrusion (1181) is matched with the chute (1151).

Description

Damping force testing device of shock absorber Technical Field The invention relates to the technical field of shock absorber testing, in particular to a damping force testing device of a shock absorber. Background In order to reduce the impact of riding vibration on a rider and improve riding comfort, electric bicycles are generally provided with shock absorbers between wheels and a frame. Before the produced shock absorber is installed on an electric vehicle, the damping force of the shock absorber needs to be detected to ensure that the produced shock absorbers with the same specification are consistent in size, and the phenomenon that the wheels jump when the electric bicycle runs due to different damping forces of the shock absorbers on two sides of the wheels after the produced shock absorbers are installed on the electric bicycle is avoided. When the damping force of the shock absorber for the electric bicycle is detected, the mounting holes at two ends of the shock absorber are required to be aligned with the inserting shafts on the testing device, so that the shock absorber is stably connected with the damping force testing device through the mounting holes, then the testing device presses the shock absorber, the pressure and the deformation of the shock absorber in the pressing process are respectively monitored through the pressure sensor and the displacement sensor, a group of testing curves can be obtained, and the damping force of the shock absorber can be obtained through analysis and processing. In the prior art, a mode of vertically hanging a shock absorber on a testing device is adopted to detect damping force of the shock absorber, when the damping force testing device applies pressure to the shock absorber, external force applied to a piston rod of the shock absorber not only has the pressure of the damping force testing device, but also contains self gravity, so that certain error exists in the damping force testing precision of the shock absorber, in addition, after an installation hole at the end part of the shock absorber is aligned with an inserting shaft of the damping force testing device, if the diameter of the inserting shaft is kept consistent with the diameter of the installation hole, the efficiency of the shock absorber placed on the damping force testing device is reduced, the damping force testing efficiency of the shock absorber is further reduced, if the diameter of the inserting shaft is far smaller than the diameter of the installation hole, the inserting shaft cannot form stable connection with the shock absorber through the installation hole, and the end part of the shock absorber is easy to be damaged when the testing pressure is too large. For this purpose, a damping force testing device for a shock absorber is proposed. Disclosure of Invention The invention aims to provide a damping force testing device for a shock absorber, which is characterized in that the diameter of a cylindrical barrel playing a role of an inserting shaft is smaller, after the cylindrical barrel is inserted into an installation hole at the end part of the shock absorber, the end part of the shock absorber pushes an auxiliary component to move so as to further expand the inserting component, and the shock absorber is horizontally placed, so that the problems that the testing efficiency is low due to the fact that the diameter of the inserting shaft is consistent with the diameter of the installation hole, and the end part of the shock absorber is damaged due to the fact that the inserting shaft cannot form stable connection with the shock absorber when the diameter of the inserting shaft is smaller than the diameter of the installation hole in the prior art are solved, the testing efficiency and the testing precision of the shock absorber of an electric bicycle can be guaranteed, the shock absorber can be effectively adapted to the shock absorbers with different sizes, the stability between the shock absorber and the damping force testing device can be fully guaranteed, and the end part of the shock absorber after the shock absorber is tested can be prevented from being damaged. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a bumper shock absorber damping force testing arrangement, includes test base, mount, fixed bolster, pressure sensor, pneumatic cylinder, slider, still includes displacement sensor, removes frame, spacing subassembly, auxiliary assembly and grafting subassembly, four remove the two liang parallel arrangement of frame and at test base surface, and middle two remove the frame and laminate mutually with the slider surface, displacement sensor installs and is close to mount one side in the middle two removal frames, spacing subassembly is installed between two removal frames that have the clearance, and spacing subassembly extends to mount one side, auxiliary assembly and spacing subassembly