CN205371410U - Automatic clearance adjustment arm of easily installation type - Google Patents

Abstract

The utility model relates to an automatic clearance adjustment arm of easily installation type, including the connecting rod, be equipped with first round pin axle on the connecting rod, first round pin axle is connected with the arm body through second round pin axle, and second round pin spool and be connected to pitch and be connected, arm are personally experienced sth. Part of the body and are connected with the gear through the connecting rod, and the gear is connected with the turbine, and the turbine is connected with the worm, and the both ends of worm are equipped with dextrorotation torsional spring and levogyration torsional spring respectively. It is too complicated that it can solve the installation, and occupation space is great, and the vehicle operation in -process is because of the long -term shake scheduling problem that became invalid easily for adopt the clearance adjustment after the braking to avoid producing the over modulation, thereby avoid the brake block inefficacy of generating heat.

Description

A kind of easily mount type automatic clearance adjuster

Technical field

This utility model belongs to brake component technical field, is specifically related to a kind of easily mount type automatic clearance adjuster.

Background technology

At present, conventional automatic clearance adjuster carries out gap adjustment after mostly being braking again, and structure needs band installing plate and connecting plate molectron install, this structure exists installs excessively complexity, take up room bigger, because of problems such as long-term jitter easily inefficacies in vehicle operation, the gap adjustment after braking is adopted easily to produce toning and cause that brake block generates heat.

Application number is " 201510680577.6 ", publication number is " CN105156524A ", name is called the Chinese invention patent application of " a kind of arm for adjusting automobile brake clearance automatically ", disclose a kind of arm for adjusting automobile brake clearance automatically, the inner chamber of its housing is provided with worm-and-wheel gear, it is characterized in that being additionally provided with coaxial with worm gear and the dynamic main drive gear coordinated in the lumen, driving gear is connected with automobile brake chamber support by connector, the driven gear engaged with main drive gear carries out transmission by spring clutch with actively helical gear, actively helical gear engages with the passive helical gear being arranged on worm shaft, passive helical gear carries out transmission by adjusting sleeve and drive sleeve and worm shaft.Although it can change setting gap length, but it equally exists installation excessively complexity, takes up room relatively big, because of problems such as long-term jitter easily inefficacies in vehicle operation.

The patent No. is " ZL201220465431.1 ", Authorization Notice No. is " CN202746467U ", name is called " a kind of arm for adjusting automobile brake clearance automatically, brake unit and automobile " Chinese utility model patent, disclose a kind of arm for adjusting automobile brake clearance automatically, including housing, clutch gear, arm body, clutch worm gear, worm screw, torsionspring, gear, torsionspring, the structures such as worm gear, it eliminates the one-way clutch mechanism with end-tooth, movable pulley and the fluted disc of original structure is replaced with a flange, a spacing is there is between described gear and flange, described spacing is corresponding with the normal clearance between brake drum and friction plate.Although it can meet installation needs, improve the transmission efficiency of moment, but it is excessively complicated also without solving to install, take up room relatively big, because of problems such as long-term jitter easily inefficacies in vehicle operation.

On the whole, the more existing automatic clearance adjuster for car braking, exist installation excessively complexity more, take up room relatively big, because of problems such as long-term jitter easily inefficacies in vehicle operation, for this, need a kind of easily mount type automatic clearance adjuster, solve the problems referred to above so that adopt the gap adjustment after braking to avoid producing toning, thus avoiding brake block heating to lose efficacy.

Utility model content

The purpose of this utility model is in that to provide a kind of easily mount type automatic clearance adjuster, solve to install excessively complicated, take up room relatively big, because of problems such as long-term jitter easily inefficacies in vehicle operation, the gap adjustment after adopting braking is made to avoid producing toning, thus avoiding brake block heating to lose efficacy.

For achieving the above object, this utility model provides a kind of easily mount type automatic clearance adjuster, including connecting rod, connecting rod is provided with the first bearing pin, and the first bearing pin is connected with arm body by the second bearing pin, and the second bearing pin is connected with being connected fork, arm body is connected with gear by connecting rod, gear is connected with turbine, and turbine is connected to worm screw, worm screw be respectively arranged at two ends with dextrorotation torsion spring and left-handed torsion spring.

In above scheme preferably, the side end of left-handed torsion spring is provided with activity template.

In any of the above scheme preferably, the side end of activity template is provided with waveform back-up ring.

In any of the above scheme preferably, worm screw is provided with plain washer.

In any of the above scheme preferably, the side end face of dextrorotation torsion spring is provided with blanking cover.

In any of the above scheme preferably, brake chamber is connected with arm body by connecting fork.

In any of the above scheme preferably, turbine is connected with camshaft.

In any of the above scheme preferably, camshaft is arranged in vehicle bridge.

Compared with prior art, this utility model has the advantage that

This utility model provides a kind of easily mount type automatic clearance adjuster, can solve the problem that installation is excessively complicated, take up room relatively big, because of problems such as long-term jitter easily inefficacies in vehicle operation, the gap adjustment after adopting braking is made to avoid producing toning, thus avoiding brake block heating to lose efficacy；It can adopt the gap adjustment before braking to promote the service behaviour of product in brakes, reduces potential failure mode, reduces maintenance frequency and the maintenance cost of user, and it adopts lever construction to improve the stability adjusting arm, and its installation is simple and easy.

Accompanying drawing explanation

Fig. 1 is the structural representation of an embodiment according to easy mount type automatic clearance adjuster of the present utility model；

Fig. 2 is that the B-B of the of the present utility model easy mount type automatic clearance adjuster according to embodiment illustrated in fig. 1 is to sectional view；

Fig. 3 is that the C-C of the of the present utility model easy mount type automatic clearance adjuster according to embodiment illustrated in fig. 1 is to sectional view.

In figure, 1 is connecting rod, and 2 is the first bearing pin, and 3 is gear, and 4 for connecting fork, and 5 is arm body, and 6 is the second bearing pin, and 7 is blanking cover, and 8 is dextrorotation torsion spring, and 9 is plain washer, and 10 is worm screw, and 11 is left-handed torsion spring, and 12 is activity template, and 13 is waveform back-up ring, and 14 is turbine.

Detailed description of the invention

In order to be more fully understood that this utility model, below in conjunction with specific embodiment, this utility model is explained in detail.It is clear that this utility model can be carried out different modification and remodeling and without departing from this utility model broader spirit and scope of appended claims.Therefore, following example have the exemplary implication without restriction.

Embodiment:

A kind of easily mount type automatic clearance adjuster, as shown in Figure 1 to Figure 3, including connecting rod 1, connecting rod 1 is provided with the first bearing pin 2, and the first bearing pin 2 is connected with arm body 5 by the second bearing pin 6, and the second bearing pin 6 is connected with being connected fork 4, arm body 5 is connected with gear 3 by connecting rod 1, gear 3 is connected with turbine 14, and turbine 14 is connected to worm screw 10, worm screw 10 be respectively arranged at two ends with dextrorotation torsion spring 8 and left-handed torsion spring 11.

In the above-described embodiments, the side end of left-handed torsion spring 11 is provided with activity template 12.

In the above-described embodiments, the side end of activity template 12 is provided with waveform back-up ring 13.

In the above-described embodiments, worm screw 10 is provided with plain washer 9.

In the above-described embodiments, the side end face of dextrorotation torsion spring 8 is provided with blanking cover 7.

In the above-described embodiments, brake chamber is connected with arm body 5 by connecting fork 4.

In the above-described embodiments, turbine 14 is connected with camshaft.

In the above-described embodiments, camshaft is arranged in vehicle bridge.

Easy mount type automatic clearance adjuster of the present utility model, it eliminates mounting plates structure form, install simple and easy, its activity template 12 plays position-limiting action, its waveform back-up ring 13 plays damping effect, the size being smaller in size than the second bearing pin 6 of its first bearing pin 2, the size being smaller in size than left-handed torsion spring 11 of its dextrorotation torsion spring 8.Its operation principle: brake chamber is attached with the arm body 5 adjusting arm by connecting fork 4, up moved by connection fork the 4, second bearing pin the 6, first bearing pin 2 drivening rod 1 when air chamber is braked, connecting rod 1 driven gear 3(direction clockwise movement as shown in Figure 2), then passing through left-handed torsion spring 11 drives worm screw 10 to rotate clockwise, worm gear 14 is driven to rotate under the rotation of worm screw 10, and drive the rotation of vehicle bridge OHC, when braking disappears, by worm screw 10 locking under the effect of dextrorotation torsion spring 8 so that worm screw 10 can not rotate.

And the following structural principle of automatic clearance adjuster of prior art: (1) initial position, connecting plate is fixed on support, and tooth bar contacts with the notch upper end of control loop.The width of notch determines the setting gap width between brake block and brake drum.(2) turn over clearance angle, adjust arm and turn over angle A.Now, tooth bar moves downward and end in contact under the notch of control loop, and brake-shoe opens.When there is excess gap, brake block contacts with brake drum still end.(3) turn over excess clearance angle B, adjust arm and be rotated further.Now, tooth bar with end in contact under the notch of control loop (control loop is integrated by riveting with fixing control arm), it is impossible to continue to move downward.Rack drives gear rotates, and one-way clutch can rotate relatively freely after turning over angle B in this, and camshaft drives brake-shoe to open further, causes brake block to contact with brake drum.(4) angular flexibility C is proceeded to, when adjusting arm and being rotated further, owing to brake block contacts with brake drum, the moment acted on camshaft and worm gear increases sharply, the power (to the right) that worm gear acts on worm screw increases therewith, make worm screw compression spring and move right, thus causing that worm screw separates with cone clutch.(5) turning angular flexibility C, when adjustment arm is rotated further, tooth bar is limited by control loop and still can not move downward and drive pinion rotation.At this moment owing to cone clutch and worm screw are in released state, whole free-wheeling assembly rotates together.(6) to turning round angular flexibility C, braking starts release, adjusts arm to turning round angle C.Under the effect of return spring so that the notch lower end of tooth bar tight note control loop downwards.Now, cone clutch and worm screw are still in released state, and it is freely rotatable that tooth bar can order about free-wheeling assembly.(7) to turning round into clearance angle A, along with brake block acts on the release of brake drum upward pressure, the moment acting on camshaft and worm gear disappears, worm gear is applied to the right the power of worm screw and also disappears, spring restores, and promotes worm screw to be moved to the left so that worm screw engages again with cone clutch.(8) to turning round clearance angle A, arm is adjusted to turning round A.Tooth bar moves upward, and becomes upper end with contacting of the notch of control loop from lower end.(9) to turning round excess clearance angle B, adjustment arm is rotated further and returns to original position.Now, tooth bar contacts with the notch upper end of fixing control loop, is limited and can not continue to move up.When adjusting revolution of arm, rack drives pinion rotation, at this moment one-way clutch and Wimble tooth-like clutch are in engagement so that worm screw rotates with gear, worm drive worm gear, worm-gear driven camshaft, and the rotation of face-to-face camshaft makes excess gap reduce.This adjustment arm is to carry out gap adjustment after braking again, and needs band installing plate and connecting plate molectron to install in structure, and this mode is installed excessively complicated, takes up room relatively big, because of problems such as long-term jitter easily inefficacies in vehicle operation.Although it solves the problem that gap adjusts, but because be the gap adjustment after adopting braking easily produce toning make now the problems such as brake block heating.

Easy mount type automatic clearance adjuster of the present utility model, the gap adjustment before braking can be adopted to promote the service behaviour of product in brakes, reduce potential failure mode, reduce maintenance frequency and the maintenance cost of user, adopt lever construction to improve the stability adjusting arm, and install simple and easy.

Claims (8)

1. an easy mount type automatic clearance adjuster, including connecting rod (1), it is characterized in that: connecting rod (1) is provided with the first bearing pin (2), first bearing pin (2) is connected with arm body (5) by the second bearing pin (6), second bearing pin (6) is connected with being connected fork (4), arm body (5) is connected with gear (3) by connecting rod (1), gear (3) is connected with turbine (14), turbine (14) is connected to worm screw (10), worm screw (10) be respectively arranged at two ends with dextrorotation torsion spring (8) and left-handed torsion spring (11).

2. easily mount type automatic clearance adjuster as claimed in claim 1, it is characterised in that: the side end of left-handed torsion spring (11) is provided with activity template (12).

3. easily mount type automatic clearance adjuster as claimed in claim 2, it is characterised in that: the side end of activity template (12) is provided with waveform back-up ring (13).

4. easily mount type automatic clearance adjuster as claimed in claim 3, it is characterised in that: worm screw (10) is provided with plain washer (9).

5. easily mount type automatic clearance adjuster as claimed in claim 4, it is characterised in that: the side end face of dextrorotation torsion spring (8) is provided with blanking cover (7).

6. easily mount type automatic clearance adjuster as claimed in claim 5, it is characterised in that: brake chamber is connected with arm body (5) by connecting fork (4).

7. the easy mount type automatic clearance adjuster as according to any one of claim 1-6, it is characterised in that: turbine (14) is connected with camshaft.

8. easily mount type automatic clearance adjuster as claimed in claim 7, it is characterised in that: camshaft is arranged in vehicle bridge.