CN101089425A

CN101089425A - Improved structure of scroll axle in hand regulating arm of vehicle

Info

Publication number: CN101089425A
Application number: CNA2007100698102A
Authority: CN
Inventors: 陈招文
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-29
Filing date: 2007-06-29
Publication date: 2007-12-19

Abstract

The present invention discloses an improved structure of worm shaft place in hand-operated adjusting arm of car, belonging to the field of brake mechanism of car. Said improved structure includes the following several portions: worm shaft, worm connected on the worm shaft, worm wheel meshed with said worm and positioning device set between shell body and worm shaft. It is characterized by that the described worm is cover-connected on the worm shaft, between the worm and worm shaft a spline structure is set.

Description

Vehicle manual is adjusted the structure-improved at worm shaft place in the arm

Technical field

The invention belongs to automobile technical field, particularly a kind of vehicle manual is adjusted the structure-improved at worm shaft place in the arm.

Background technique

The braking of automobile normally utilizes contact friction effect between brake shoe and the brake drum and realizes.Because in the process of driving, meeting contact friction continually between brake shoe and the brake drum becomes big owing to abrasive action makes gap between the two between brake shoe and the brake drum, this can have influence on the automobile safety in utilization of arrestment mechanism in the process of moving.Often need in the existing automobile braking mechanism to be provided with the adjustment arm of adjusting brake clearance between brake shoe and the brake drum, thereby make brake clearance between the two can remain on a constant value, to guarantee the Security of automobile braking mechanism work.

The structure of the hand regulation arm of existing automobile comprises the housing of a sealing, is provided with intermeshing worm gear and worm mechanism in housing, and worm screw is connected and at one end stretches out on the worm shaft of hull outside.Between worm shaft and housing, also be provided with positioning device, have steel ball in this positioning device, on the outer circumferential face of worm shaft, be provided with six locating slots in the position of steel ball, in housing, be provided with the spring of roof pressure on steel ball, under the effect of spring force, the steel ball roof pressure is in positioning shaft, to realize the circumferential location to worm shaft.

Along with the continuous growth of automobile amount, also increase substantially as the demand of the braking adjusting arm of auto parts and components, in this case, improve and become a kind of trend adjusting arm.

Have regular grinding in the hand regulation arm between the flank of tooth of worm and wheel, worm gear or worm screw damage easily, because worm screw is connected on the worm shaft very inconvenience when changing damaged worm gear and/or worm screw.General processing mode all is to change whole adjustment arm, because tend to destroy other structures when changing worm gear and/or worm screw, can not keep in repair; When changing, whole braking system must be removed, just replaceable adjustment arm.Adjust in the arm about 2.5 kilograms for one, being used in the whole year will waste a lot of tons of steel in the maintenance.Requirement for low energy consumption is runed counter to fully.In driver's driving process,, caused the conveying cost to uprise, also brought unsafe factor because inconvenient maintenance can not in time be fixed a breakdown the driver.

The adjustment of vehicle brake gap realizes by the rotary worm axle, when adjusting brake clearance at every turn, the minimum amounts of rotation of worm shaft is the circumferential distance between adjacent two locating slots, owing to only be provided with six locating slots on the worm shaft in the existing hand regulation arm, both worm shaft rotated a circle, and had only six gear location; Distance between every adjacent two locating slots is bigger, therefore, and the low precision that this adjustment arm is adjusted brake clearance; The driver is difficult to the braking gap of all wheels of a car is adjusted to unanimity, causes the wheel braking non-uniform phenomenon, causes hidden danger.

Summary of the invention

The objective of the invention is to adjust existing the problems referred to above of structure of worm shaft in the arm, and provide a kind of vehicle manual of being convenient to dismantle and keep in repair to adjust the structure-improved at worm shaft place in the arm at existing vehicle manual.

Another object of the present invention is: provide a kind of brake clearance to adjust the structure-improved that the high vehicle manual of precision is adjusted worm shaft place in the arm.

Purpose of the present invention can realize by following technical proposal: a kind of vehicle manual is adjusted the structure-improved at worm shaft place in the arm, be located at and adjust in the arm housing, comprise worm shaft, be connected worm screw, the worm gear that is meshed with worm screw on the worm shaft, be located at the positioning device between housing and the worm shaft, it is characterized in that, described worm screw is socketed on the worm shaft with gap, is provided with the spline structure that cooperatively interacts between worm screw and the worm shaft.

Described worm shaft is connected on the housing rotationally, and during the rotary worm axle, worm screw drives worm gear and rotates, and the brake rod that worm gear drives is provided with on it rotates, thereby realizes the adjusting to brake clearance.After worm gear and/or worm screw damage, can be under the situation of the connecting structure of removing worm shaft and housing place, after worm shaft extracted from worm screw, can change worm gear and/or worm screw easily.

In the structure-improved of this worm shaft, between described housing and worm shaft, be provided with seal ring.Owing to after the worm screw of enclosure interior and/or worm gear are damaged, need in housing, extract worm shaft, need to be provided with seal ring between worm shaft and the housing, to guarantee the seal request between worm shaft and the housing.

In the structure-improved at this worm shaft place, be provided with dismountable shackle member on housing, this shackle member is connected on the worm shaft.Shackle member is used to limit worm shaft moving in the axial direction, worm shaft is cooperated with worm screw stablize.

In the structure-improved at this worm shaft place, described shackle member is a shaft-like bayonet lock, and this bayonet lock is applied on the housing, is provided with the draw-in groove of annular on the outer circumferential face of worm shaft, and described bayonet lock is connected in the draw-in groove with gap.After bayonet lock was connected in the described draw-in groove, worm shaft can be realized accessible rotation.Bayonet lock also can be replaced by a plurality of stop screw of being located on the housing, and the inner end of these stop screws can be inserted in the draw-in groove with gap.

In the structure-improved at this worm shaft place, described draw-in groove is positioned at the place, the inner that worm shaft extend into housing.Draw-in groove can be located on other positions on the worm shaft, but considers from the convenient angle that is provided with, and draw-in groove is located at the place, the inner that worm shaft extend into housing, is convenient to the position of bayonet lock on housing and is provided with.

Adjustment precision when vehicle brake gap being adjusted in order to improve, described positioning device comprises is located at 16-20 the locating slot that annular is provided with on the worm shaft outer circumferential face, these locating slots are distributed on the outer circumferential face of worm shaft, be provided with the steel ball of roof pressure in locating slot on the housing in the position of this locating slot, be provided with the spring that is fixedly connected on the housing in the outside of steel ball, the spring roof pressure is on steel ball.After the locating slot number increased, the circumferential distance of adjacent two locating slots on worm shaft diminished, and increased the precision that brake clearance is adjusted.

In the structure-improved at this worm shaft place, between the inner end of described spring and steel ball, be provided with the spring seat of bowl-type.Spring seat is between steel ball and spring, and spring seat is used to transmit the elastic force of spring.Be provided with spring seat herein, the diameter of steel ball can be made very little, and steel ball can satisfy the positioning requirements of the worm shaft that has more number locating slot.And that spring can be made is very big, makes spring have bigger elastic force.

Compared with prior art, beneficial effect of the present invention is:

1, the joining part of worm shaft and worm screw is a spline structure, and be Spielpassung between the two, when needs are changed worm gear and/or worm screw, worm shaft and worm screw are separated, after worm shaft and worm screw are separated, just can in housing, take out worm and worm wheel easily, thereby provide convenience for adjusting the arm maintenance.

2, because worm gear and/or worm screw can be keeped in repair after being damaged easily, do not need whole adjustment arm is done to scrap processing, saved the operating cost of automobile, saved steel simultaneously yet.

3, ring-type is evenly equipped with 16-20 locating slot on the outer circumferential face of worm shaft, only be provided with 6 locating slots on the outer circumferential face with respect to existing worm shaft, when the rotary worm axle is regulated vehicle brake gap, has higher degree of regulation, make the braking gap of all wheels of a car be adjusted to consistent error minimizing, improved the Security of exercising.

Description of drawings

Fig. 1 is that the structure-improved at this worm shaft place is assemblied in the exploded drawing of adjusting on the arm housing;

Fig. 2 is the structure-improved and adjustment arm housing rigging position schematic representation at this worm shaft place.

Wherein, 1, worm shaft; 2, seal ring; 3, housing; 4, spring; 5, spring seat; 6, steel ball; 7, bayonet lock; 8, worm screw; 9, worm gear; 10, locating slot; 11, draw-in groove.

Embodiment

See Fig. 1, Fig. 2, the structure-improved at worm shaft place is assemblied in and adjusts in the arm housing 3 in this automobile brake clearance manual adjusting arm.One end of worm shaft 1 is inserted in the housing 3, and the other end is positioned at the outside of housing 3, and worm shaft 1 can rotate on housing 3.

Be provided with rubber seal 2 on housing 3, this rubber seal 2 is socketed on the worm shaft 1 simultaneously.

Be provided with worm screw 8 in housing 3, worm screw 8 is a hollow-core construction, and described worm shaft 1 inserts in the worm screw 8 with gap, and the part that matches between worm screw 8 and the worm shaft 1 is a spline structure.In housing 3, also be provided with worm gear 9, the axis normal of the axis of worm gear 9 and worm screw 8, and worm gear 9 is meshing with each other together with worm screw 8.

Be provided with the positioning device that acts on the worm shaft 1 in the wall body of housing 3, this positioning device is two covers, and they are located at the both sides of worm shaft 1 symmetrically.Positioning device comprises steel ball 6, spring 4, and the elastic force of spring 4 acts on the steel ball 6.Ring-type is evenly equipped with 16-20 locating slot 10 on the outer circumferential face of worm shaft 1, and the position of locating slot 10 is corresponding with the position of positioning device.The number of locating slot 10 is preferably 18, and these locating slots 10 are close on the outer circumferential face of worm shaft 1 each other.Above-mentioned steel ball 6 roof pressures are in locating slot 10.In order to adapt to the circumferential positioning requirements of number more locating slot 10 and 6 pairs of worm shafts 1 of steel ball, the diameter of described steel ball 6 should guarantee that steel ball 6 can fully fit with the surface of locating slot 10, and should have enough pressure between steel ball 6 and the locating slot 10, the diameter of steel ball 6 can not be too big, and that spring 4 can not be made is too little, therefore, between spring 4 and steel ball 6, be provided with a bowl-shape spring seat 5, spring 4 bigger elastic force can be delivered on the steel ball 6 by spring seat 5, steel ball 6 can stably remain in the locating slot 10, and then makes the vehicle brake gap that obtains by rotary worm axle 1 stably to maintain.

After worm shaft 1 was assembled on the housing 3, worm shaft 1 answered retainer shaft to stable.Therefore, on housing 3, also be provided with a shaft-like bayonet lock 7, bayonet lock 7 generally is applied on the housing 3, is positioned at the draw-in groove 11 that is provided with ring-type on the end outer circumferential face of housing 3 at worm shaft 1, and the part on the bayonet lock 7 is along being plugged on gap in the draw-in groove 11 on the tangential direction of draw-in groove 11.

Claims

1, a kind of vehicle manual is adjusted the structure-improved at worm shaft place in the arm, be located at and adjust in the arm housing (3), comprise worm shaft (1), be connected worm screw (8), the worm gear (9) that is meshed with worm screw (8) on the worm shaft (1), be located at the positioning device between housing (3) and the worm shaft (1), it is characterized in that, described worm screw (8) is socketed on the worm shaft (1) with gap, is provided with the spline structure that cooperatively interacts between worm screw (8) and the worm shaft (1).

2, vehicle manual according to claim 1 is adjusted the structure-improved at worm shaft place in the arm, it is characterized in that, is provided with seal ring (2) between described housing (3) and worm shaft (1).

3, vehicle manual according to claim 1 and 2 is adjusted the structure-improved at worm shaft place in the arm, it is characterized in that be provided with dismountable shackle member on housing (3), this shackle member is connected on the worm shaft (1).

4, vehicle manual according to claim 2 is adjusted the structure-improved at worm shaft place in the arm, it is characterized in that, described shackle member is a shaft-like bayonet lock (7), this bayonet lock (7) is applied on the housing (3), be provided with the draw-in groove (11) of annular on the outer circumferential face of worm shaft (1), described bayonet lock (7) is connected in the draw-in groove (11) with gap.

5, vehicle manual according to claim 4 is adjusted the structure-improved at worm shaft place in the arm, it is characterized in that, described draw-in groove (11) is positioned at the place, the inner that worm shaft (1) extend into housing (3).

6, vehicle manual according to claim 1 and 2 is adjusted the structure-improved at worm shaft place in the arm, it is characterized in that, described positioning device comprises is located at 16-20 the locating slot (10) that annular is provided with on worm shaft (1) outer circumferential face, these locating slots (10) are distributed on the outer circumferential face of worm shaft (1), upward be provided with the steel ball (6) of roof pressure in locating slot (10) at housing (3) in the position of this locating slot (10), be provided with the spring (4) that is fixedly connected on the housing (3) in the outside of steel ball (6), spring (4) roof pressure is on steel ball (6).

7, vehicle manual according to claim 6 is adjusted the structure-improved at worm shaft place in the arm, it is characterized in that, is provided with the spring seat (5) of bowl-type between the inner end of described spring (4) and steel ball (6).