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Low friction space constant torque spring cam mechanism

A cam mechanism, low-friction technology, used in mechanical equipment, belts/chains/gears, transmissions, etc., can solve the problem of large radial size, and achieve a small radial size, high stability, and a wide range of applicable torque. Effect

Active Publication Date: 2017-11-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large radial dimension in the existing planar low-friction spring cam structure, and to provide a low-friction space constant torque spring cam mechanism

Method used

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  • Low friction space constant torque spring cam mechanism
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specific Embodiment approach 1

[0010] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the low-friction space constant torque spring cam mechanism described in this embodiment includes a cam assembly, a spring 3 and a swing rod 4, the cam assembly includes a cam 1, a roller 2 and a reel 5, and one end of the swing rod 4 The power input shaft is connected, the reel 5 is connected to the power output end, the swing rod 4 and the cam assembly are connected by a spring 3, and the torque transmission between the swing rod 4 and the cam 1 is realized; the power input shaft is inside the reel 5, and the reel The barrel 5 and the power input shaft are concentric, the outline of the cam 1 is fixedly connected to the inner wall of the reel 5, the roller 2 rolls in the rolling groove of the cam 1, one end of the spring 3 is fixedly connected to the roller 2, and the spring The other end of 3 is fixedly connected on the other end of fork 4.

[0011] In this embodiment, the...

specific Embodiment approach 2

[0013] Specific implementation mode two: the following combination figure 1 This embodiment will be described. This embodiment will further describe Embodiment 1, and the spring 3 is a cylindrical helical tension spring.

specific Embodiment approach 3

[0014] Specific implementation mode three: the following combination figure 1 This embodiment will be described. This embodiment will further describe Embodiment 1. The swing link 4 is connected to a power input shaft, and the power input shaft is a motor shaft or a reducer shaft.

[0015] In this embodiment, the swing rod 4 is used as a torque input end to input the torque output by the motor into the cam.

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Abstract

The invention relates to a low-friction spatial constant-torque spring and cam mechanism, and belongs to the technical field of constant-force loading mechanisms. The low-friction spatial constant-torque spring and cam mechanism is used for solving the problem that an existing planar low-friction spring and cam mechanism is large in radial dimension. The low-friction spatial constant-torque spring and cam mechanism comprises a cam assembly, a spring and a swing rod. The cam assembly comprises a cam, a roller and a reel. One end of the swing rod is connected with a power input shaft, the reel is connected with a power output end, the swing rod is connected with the cam assembly through the spring, and therefore torque transmission between the swing rod and the cam is achieved. The power input shaft is arranged in the reel coaxial with the power input shaft. The outline of the cam is fixedly connected to the inner side wall of the reel. The roller rolls in a rolling groove of the cam. One end of the spring is fixedly connected to the roller, and the other end of the spring is fixedly connected to the other end of the swing rod. The low-friction spatial constant-torque spring and cam mechanism is applied to passive constant-force mechanisms.

Description

technical field [0001] The invention belongs to the technical field of constant force loading mechanism. Background technique [0002] Constant force loading mechanism is widely used in paper roll, thermal power generation, material testing, aerospace equipment and other fields, and it can directly affect the safety and reliability of equipment. Especially in the field of aerospace, it is often used as a ground verification method to verify the performance of spacecraft through the constant force mechanism to provide micro-low gravity compensation. Traditional gravity compensation methods include breeding balance, air flotation, water flotation, suspension method, etc. Among them, the gravity simulation of suspension method has two methods: active compensation and passive compensation. [0003] In the prior art, most passive constant force output devices use scroll springs or torsion springs. The limitations of this type of constant force device are reflected in the followi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H37/12
CPCF16H37/12
Inventor 高海波刘振牛福亮邓宗全丁亮李楠
Owner HARBIN INST OF TECH
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