CN202349050U - Novel parking gap self-adjustable mechanism of rear disc brake - Google Patents

Abstract

The utility model relates to a novel parking gap self-adjustable mechanism of a rear disc brake, which belongs to the technical field of the automobile brake. A threaded sleeve seat is in clearance fit with a self-adjustable threaded sleeve through an elastic retainer ring, and the self-adjustable threaded sleeve is in a threaded connection with a self-adjustable threaded rod. According to the novel parking gap self-adjustable mechanism of the rear disc brake, parts are easy to process, the assembly technology is simple, and the efficiency is improved and the investments in a welding equipment and a welding strength testing equipment are reduced compared with those of the welding means, the dimensional accuracy of the machining parts is easy to control, the part strength is high, the parts are abrasion resistant, the reliability of the products is improved, and the cost is reduced.

Description

Novel back disk type braker Parking clearance self-regulating mechanism

Technical field

The utility model belongs to the automobile brake technical field, refers in particular to a kind of back disk type braker.

Background technique

Back disk type braker is the braking executive device in the car braking system, is the critical component in the brake system of car.Its working principle is the hydraulic pressure that utilizes brake master cylinder assy to produce, and being sent to afterwards through braking line, braking clamp body makes brake slipper contact with the back brake disc and then produces the trend that surface friction drag stops the rotation or the rotation of wheel.The element of back disk type braker is more than drum brake; And can emergency braking system and parking braking system be integrated into braking clamp body inside; So structure is compact more, maintenance difficulty is bigger, but the advantage of drum brake also clearly after the back brake calipers was compared; Braking efficiency good stability, brake compensation property are good, good heat dissipation, that the chance water stability is good, brake slipper is changed is convenient, so the trend that progressively substitutes the back drum brake is arranged.

Vehicle is when cruising; The caliper piston is near brake slipper and be in the initial position of off working state, is keeping suitable gap between brake slipper and the brake disc, during braking; Hydraulic drive caliper piston; The caliper piston promotes brake slipper and clamps brake disc, relies on surface friction drag to stop the trend of the rotation or the rotation of wheel, accomplishes one time braking maneuver.The caliper piston can be return under the effect of rubber parts elastic force after each service brake, and the distance of at every turn returning all is consistent, and after work a period of time, brake slipper and brake disc can wear and tear gradually, thereby the part that causes the caliper piston to stretch out caliper increases gradually.The halting mechanism that is positioned at the caliper rear portion like this will break away from piston, and this will make Parking efficient reduce until inefficacy, so need to increase the Parking clearance self-regulating mechanism.

The halting mechanism of back disk type braker utilizes the Parking lever part to promote the caliper piston and realizes Parking; In order can in the Parking process, to touch all the time with it at a distance of caliper piston more and more far away by lever part; Make Parking efficient consistent all the time; In brake caliper assy, increase a mechanism of adjusting play voluntarily, be called the Parking clearance self-regulating mechanism.The Parking clearance self-regulating mechanism is one of component very crucial in the disk type braker of back, is the indispensable parts of realizing Parking.

Conventional Parking clearance self-regulating parts are made up of catch, adjustment swivel nut, adjustment screw rod.Adjustment swivel nut and caliper piston contact matching; Adjustment screw rod and caliper contact matching; The adjustment swivel nut relies between the screw rod with adjustment and is threaded, and when the caliper piston receives hydraulic pressure to produce displacement in caliper, adjusts swivel nut and rotatablely moves along adjusting screw flight; Make adjustment swivel nut and adjustment screw rod on axial direction, produce displacement amount, thereby compensated the gap that the wearing and tearing owing to brake slipper and brake disc produce.

Adjustment swivel nut inside need process multiple thread, and in order to satisfy the technological requirement of multiple thread processing, two port part of adjustment swivel nut must be opened; After processing interior shape, adopt catch to carry out shutoff, because catch will form airtight cavity volume with the adjustment swivel nut; And can bear certain hydraulic pressure, so catch adopts welding manner with the adjustment swivel nut, and the welding back is yielding; And the face of weld difficult treatment, common welding procedure can not satisfy performance requirement.Need special welding procedure, cause the difficulty of welding processing big, the process-cycle is long, and cost is high.

Summary of the invention

The utility model provides a kind of novel back disk type braker Parking clearance self-regulating mechanism, to solve the problem that difficulty is big, the process-cycle is long, cost is high of routine techniques welding processing.

The technological scheme of the utility model is: swivel nut seat and self-regulated swivel nut are through elastic back-up ring Spielpassung, and the self-regulated swivel nut is connected with the self-regulated screw flight.

The advantage of the utility model is: part is easy to processing, and assembly technology is simple, compares the not only efficient raising of welding means; Also reduce the input of welding equipment and weld strength detection facility; The machine-made spares dimensional accuracy is controlled easily, and part strength is high, and is wear-resistant; Improve reliability of products, reduced cost.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Embodiment

Swivel nut seat 1 and self-regulated swivel nut 3 are through elastic back-up ring 2 Spielpassung, and self-regulated swivel nut 3 is threaded with self-regulated screw rod 4.

Swivel nut seat 1 after the assembling and self-regulated swivel nut 3 can't break away from axially; But can rotate relatively freely; The working principle of product is identical with conventional Parking clearance self-regulating mechanism, and swivel nut seat 1 wherein is that machine adds part, and back-up ring 2 is to have opening and elastic stamping part; Use these two parts and simple assembly technology to substitute the welding means of conventional products, can realize Parking gap compensate function equally.

Claims (1)

1. novel back disk type braker Parking clearance self-regulating mechanism, it is characterized in that: swivel nut seat and self-regulated swivel nut are through elastic back-up ring Spielpassung, and the self-regulated swivel nut is connected with the self-regulated screw flight.

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