Fatigue test apparatus of vehicle manual brake controlling mechanism

A fatigue test and operating mechanism technology, which is applied in the testing of machines/structural components, measuring devices, and vehicle testing, etc., and can solve the problems of heavy counterweights, heavy counterweights, and inconvenient operation

Inactive Publication Date: 2009-02-18
ANHUI DACHANG TECH
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AI-Extracted Technical Summary

Problems solved by technology

With such a structure, the weight of the counterweight is relatively heavy, and lifting equipment is required during the test, which is not only inconvenient to ope...
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Method used

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, automobile hand brake operating mechanism fatigue test device includes frame 10, two fatigue test mechanical units, solenoid valve 7, electric control box 12, each A fatigue test mechanical unit comprises a horizontal support plate affixed to the frame 10, a specimen mounting bracket 4 on the upper surface of the support plate, a cylinder I8, a cylinder II9, a first fixed pulley 1, a second fixed pulley 6, a movable pulley 5, Steel cable 2 and counterweight 11, cylinder I8 and cylinder II9 axis intersect, first fixed pulley 1 is located at the top of one side of frame 10, second fixed pulley 6 is located at the other side of frame 10, and one end of steel cable 2 is fixed On the frame 10, the other end of the steel cable 9 is connected with a counterweight 11, and the steel cable 2 passes through the movable pulley 5, t...
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Abstract

The invention discloses a fatigue test device for an automobile manual braking operating mechanism, comprising a machine rack, a fatigue test mechanical unit, a pneumatic part and an electric control part; the fatigue test mechanical unit comprises a horizontal support plate fixedly connected with the machine rack, a specimen mounting bracket on the upper surface of the support plate, and a pulley mechanism; the pulley mechanism comprises a first fixed pulley, a second fixed pulley and a movable pulley; the first fixed pulley is arranged at the top end of one side of the machine rack; the second fixed pulley is arranged at the other side of the machine rack; one end of a wire rope is fixed on the machine rack, while the other end is connected with a balancing weight; and the wire rope is sequentially threaded through the movable pulley, the second fixed pulley and the first fixed pulley. With such a structure, the fatigue test device of the automobile manual braking operating mechanism achieves lightweight of test load balancing weight and is easy to operate during the test; besides, the fatigue test device does not need lifting equipment and can reduce the size of the machine rack to improve the utilization rate of the rack.

Application Domain

Vehicle testing

Technology Topic

Automotive engineeringBrake control +7

Image

  • Fatigue test apparatus of vehicle manual brake controlling mechanism
  • Fatigue test apparatus of vehicle manual brake controlling mechanism
  • Fatigue test apparatus of vehicle manual brake controlling mechanism

Examples

  • Experimental program(1)

Example Embodiment

[0015] like figure 1 , figure 2 , image 3 , Figure 4 As shown in the figure, the fatigue test device of the automobile hand brake operating mechanism includes a frame 10, two fatigue test mechanical units, a solenoid valve 7, and an electric control box 12. The support plate, the specimen mounting bracket 4 on the upper surface of the support plate, the cylinder I8, the cylinder II9, the first fixed pulley 1, the second fixed pulley 6, the movable pulley 5, the wire rope 2 and the counterweight 11, the axis of the cylinder I8 and the cylinder II9 Cross, the first fixed pulley 1 is located at the top of one side of the frame 10, the second fixed pulley 6 is located on the other side of the frame 10, one end of the wire rope 2 is fixed on the frame 10, and the other end of the wire rope 9 is connected with a counterweight Block 11, the wire rope 2 passes through the movable pulley 5, the second fixed pulley 6 and the first fixed pulley 1 in turn, the force F of the movable pulley pulling the specimen 3 is equal to twice the weight W of the counterweight block, so the weight of the counterweight block can be reduced. It is small, and realizes the lightweight of the test load counterweight, which is not only easy to operate during the test, does not require lifting equipment, but also reduces the volume of the rack and improves the utilization rate of the rack.
[0016] The test piece mounting bracket 4 is detachably connected to the frame 10, and can be adapted to various sizes and structures. The automobile hand brake operating mechanism of different specifications only needs to replace the test piece mounting bracket to perform the fatigue test. The electronic control part is connected with the electronic digital counter, which is convenient for users to record accurate numbers.
[0017] During the test, first install the test piece 3 of the automobile handbrake control mechanism on the test piece mounting bracket 4 with bolts. The starting position of specimen 3 is horizontal. The initial state of the cylinder I8 and the cylinder II9 is ​​the piston retracted state. Then, the piston rod of the cylinder I8 is fastened on the handle of the specimen 3 through the plane hinge mechanism, and the cylinder II9 is ​​fixed on the handle of the specimen through the fixing frame. Then connect the test piece to the movable pulley bracket, thread the wire rope 2, use a rope clip to make a loop on each end of the wire rope 2, one end of the wire rope 2 is fixed on the frame, and the other end is hung with the counterweight 11. Connect the power and air supply, press the start button, according to Figure 4 The electrical control schematic diagram shows that the magnetic switches "al, al', a2 are off, the magnetic switches a3, a4 are on, the relays K1 are on, K5 is on, K2, K3, K4, and K6 are off, and the solenoid valve coil of the cylinder I8 is controlled. Power on, the piston of the cylinder I8 extends until the magnetic switch a1' is turned on, causing K5 to be turned off, K6 to be turned on, the cylinder I8 piston continues to rise until the magnetic switch a1 is turned on, a1', a2, a3 are turned off, and a4 is turned on, Relays K1, K2, K5 are connected, K3, K4, K6 are disconnected, the solenoid valve coil of control cylinder I8 is de-energized, the piston of cylinder I8 stops rising, at the same time, the solenoid valve coil of another control cylinder II9 is ​​energized, and the piston of cylinder II9 extends , Press and hold the release button of the hand brake control mechanism until the magnetic switch a2 is turned on, at this time, a1', a3, a4 are turned off, the relays KI and K3 are turned on, and K2, K4, K5, and K6 are turned off. The solenoid valve coil of the control cylinder I8 is turned on. When the piston of the cylinder I8 retracts and meets the magnetic switch a1', a1' is turned on, the relay K6 is turned on, and the piston continues to retract. When it reaches the magnetic switch a3, a3 is turned on, and a2 is turned on. Connected, relays K1, K4 are connected, K2, K3, K5, K6 are disconnected, the piston of the cylinder II9 retracts, release the release button of the hand brake control mechanism 32, and enter the next cycle; repeat the cycle.

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