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Tread brake

A tread brake and screw technology, which is applied in the field of rail vehicle braking systems, can solve problems such as actuator jamming and reducing the reliability of tread brakes.

Inactive Publication Date: 2015-03-25
NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adjustment head and the screw head are fixedly connected. During the braking process, the adjustment head and the screw rod bear the force in the vertical direction, which will easily cause the actuator to be stuck and reduce the reliability of the tread brake.

Method used

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Examples

Experimental program
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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0027] Such as Figures 1 to 4 As shown, the tread brake of this embodiment comprises a box body 15, a brake adjustment sleeve 5 which is supported in the box body 15 by the front sliding bushing 17 and the rear sliding bushing 16 and can slide back and forth, and is arranged in the sleeve. The screw mandrel 3, the feed nut 8 and the adjustment nut 12 threaded on the screw mandrel 3, the screw mandrel head 9 connected to the front end of the screw mandrel 3, the brake shoe support 19 driven by the screw mandrel head 9, the brake adjusting sleeve 5 An adjustment seat 6 is fixed inside, and an adjustment sleeve 11 is connected through a guide key. The teeth betw...

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Abstract

The invention relates to a tread brake which comprises a box, a brake adjusting sleeve, a screw rod, a screw rod head, an adjusting base, an adjusting sleeve, a feed nut, an adjusting nut and a brake head. A first tooth clutch is formed between the adjusting base and the feed nut. A second tooth clutch is formed between the adjusting sleeve and the adjusting nut. A screw rod end cap used for limiting the adjusting nut is fixed to the rear end of the screw rod. A connecting base is hinged to the brake head through a hanging rod. A vertical dovetail groove is formed in the rear end of the connecting base. A sliding pair is formed between the screw rod head and the connecting base. The tread brake is ingenious in structural design, and the screw rod end cap can prevent the adjusting nut from disengaging from the screw rod so that damage to a screw rod thread can be prevented; as the screw rod head and the connecting base are connected in a sliding mode through the dovetail groove, the screw rod head and the connecting base can slide relatively in the braking process, and mechanism blocking can be prevented.

Description

technical field [0001] The invention relates to a tread brake of a rail transit vehicle, in particular to an actuator for the braking force of the tread brake, and belongs to the technical field of rail vehicle braking systems. Background technique [0002] During the braking process, due to the wear of the brake shoes and brake pads, the stroke of the brake cylinder piston will continue to increase. In order to maintain the reliability of the braking force, it is generally required that the unit brake has the function of automatically adjusting the gap. When the brake shoe or brake pad wears, the brake shoe gap adjuster can ensure that the gap between the brake shoe and the tread of the wheel or between the brake pad and the brake disc remains constant. [0003] Existing gap adjustment mechanism such as patent CN 202528988 U, the front adjustment nut, ring gear, retaining ring, rear adjustment nut, sleeve of contact connection are successively installed on the leading scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61H1/00
CPCB61H1/00
Inventor 臧传相王红旗朱新宇张东升庞淑娟余毅权虞晓峰田启圆
Owner NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
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