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Constant-force chest developer

A tension device and constant force technology, applied in the field of tension device, tension fitness equipment, and constant force tension device, can solve the problem that the size of the tension cannot be adjusted, and achieve the effects of light weight, adjustable tension and simple structure

Inactive Publication Date: 2009-08-19
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The reversing constant force spring mechanism with patent number CN200720070497.X can provide constant tension, but the magnitude of the tension cannot be adjusted

Method used

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  • Constant-force chest developer
  • Constant-force chest developer
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Embodiment Construction

[0029] see figure 1 , The constant force tensioner of the present invention mainly includes a frame 1, a spring 3, a twisted rope mechanism 2 and an adjustment mechanism 4.

[0030] see figure 2 The bearing support positions at both ends of the rope winding shaft 2.3 of the twisted rope mechanism 2 are installed in the bearing mounting holes on the left support plate 1.1 and the right support plate 1.2 of the frame 1 through the bearing 5, and the connecting rope 2.4 of the twisted rope mechanism 2 is fixed on the The upper end of the spring 3 is connected to the connecting hook, and the lower end of the spring 3 is inserted into the positioning hole of the lower connecting plate 1.4 of the frame 1 to be fixed. The bracket 4.1 of the adjustment mechanism 4 is screwed into the spring 3, and the screw rod 4.2 of the adjustment mechanism 4 is screwed into the frame. 1 The screw hole of the lower connecting plate 1.4 moves up and down by rotating the screw mandrel, and the upper...

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Abstract

The invention provides a constant force spring exerciser. The constant force spring exerciser has the advantages of no counterweight, simple structure and light weight, and can provide constant pulling force, and the magnitude of the pulling force can be adjusted. The constant force spring exerciser mainly comprises a machine frame, a spring, a twisted rope mechanism and an adjustment mechanism, wherein two end shaft supporting positions of a rope winding shaft of the twisted rope mechanism are arranged in bearing arrangement holes on a left supporting plate and a right supporting plate of the machine frame; a connecting rope of the twisted rope mechanism is fixed on a connecting hook at the upper end of the spring, while the lower end of the spring is inserted and fixed in a positioning hole of a lower connecting plate of the frame; a supporting block of the adjustment mechanism is screwed in the spring, a screw rod of the adjustment mechanism is screwed in a screw hole of the lower connecting plate of the frame, and the adjustment mechanism moves up and down by rotating the screw rod; the upper part of the screw rod is fixedly arranged in a middle hole of the supporting block; the twisted rope mechanism comprises a tower-shaped twisted rope disc, a pulling force rope, the connecting rope and a rope winding shaft; and the adjustment mechanism comprises the supporting block, the screw rod and a hand wheel.

Description

technical field [0001] The invention relates to a tension fitness device in the field of body-building and an equal force tension device for force balance, in particular to a constant force tension device. Background technique [0002] In daily life and work, it is often necessary to provide equipment that can provide constant tension. For example, the tension used to balance the weight of hoisted objects requires a relatively constant force. interest, to achieve better sports training purposes. [0003] The domestic multi-functional fitness equipment with the patent No. CN 95222875.0 includes: a frame part, a seat part, a pulley and a rope part on it, a counterweight part, etc. The main frame composed of rods is equipped with a high-position tension device, a low-position tension device, a chest expansion arm device, a flat push arm action device, a leg flexion and extension arm action device, etc., and an adjustment mechanism that can be lifted and lowered is provided on ...

Claims

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Application Information

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IPC IPC(8): A63B21/055
Inventor 辛天才
Owner HUAZHONG NORMAL UNIV
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