CN2500864Y - Regulating arm for automatically regulating braking gap - Google Patents

Abstract

The utility model relates to a regulating arm for automatically regulating braking gaps, particularly to a regulating arm for regulating the gas between a braking friction plate and a brake drum of an automobile. The regulating arm is composed of a pressure spring, an axis, a worm gear, a worm, etc. A rack bar is driven to move by the power generated when the automobile brakes, so that the worm gear and the worm can do circular motion correspondingly to regulate the gap between the brake drum and the friction plate, and the purpose of automatically regulating the braking gap can be achieved. The utility model has the advantages of compact structure, and convenient use and maintenance; the utility model is especially suitable for the running vehicles with more frequent braking under bad traffic environment, such as urban transport, mountain roads, etc.

Description

Automatically adjust the adjustment arm of braking gap

The utility model relates to a kind of adjustment arm of automatic adjustment braking gap, particularly relates to the self-adjusting adjustment arm in gap between a kind of braking frictional plate and the brake drum.

According to the relevant Searches of Patent Literature, it is by manually adjusting the gap between brake drum and the wearing piece, make it to satisfy the automobile brake requirement, guaranteeing traffic safety that arm is adjusted in the brake on the present domestic domestic car always.But because this adjustment mainly by manually adjusting, must not guarantee that automobile brake system is in optimum Working always.And concerning the driver, the magnitude relationship of brake clearance is to the safety of driving, be the hidden danger of safe driving always, particularly under the natural condition rugged environment, and the frequent braking in the urban public transport, its wearing and tearing are faster, as the gap between untimely adjustment brake drum and wearing piece, the generation that causes the accident easily.

The utility model purpose provides the adjustment arm of automatic adjustment braking gap, be to utilize automobile to brake each time under steam the gap between brake drum and the wearing piece is finely tuned, behind several, make brake clearance be in the optimum position, thereby guarantee that braking system is in good working order all the time.

The purpose of this utility model is achieved in that the adjustment arm of automatic adjustment braking gap is made up of housing, pressure spring, torque spring, gear, tooth bar, worm gear, worm screw, control unit, returning spring, it is characterized in that: link to each other with pressure spring in described worm shaft rear end, the front end of worm shaft is connected with shell with nut; Be provided with the gear and the clutch ring that has internal spline of internal spline respectively at the front end of worm shaft, the end face of clutch ring is the umbrella shape spline, be meshed with worm shaft end umbrella shape spline, with torsion spring, form one group of overrunning clutch, the outside of gear is provided with tooth bar, and an end of tooth bar is meshed with gear, the other end of tooth bar is provided with elbow and returning spring, and it is installed in the control unit that has groove.

The utility model is adjusted the adjustment arm of braking gap automatically, the power that brake by automobile gives, under the effect of brake control panel, drive tooth bar, gear, clutch ring, make worm screw, worm gear do relative movement, this project organization compactness, easy for installation, safe in utilization, need not the adjusting that driver carries out braking device, just can reach the purpose of automatic adjustment braking gap to the optimum state.

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

Fig. 2 is that the utility model A-A is to sectional view.

1, pressure spring 2, gear 3, shell 4, clutch ring 5, worm shaft 6, torque spring 7, tooth bar 8, control unit 9, worm gear 10, elbow 11, groove 12, returning spring

The utility model is described in further detail below in conjunction with accompanying drawing:

From Fig. 1 and Fig. 2 as can be seen, the adjustment arm of automatic adjustment braking gap described in the utility model is made up of shell 3, pressure spring 1, torque spring 6, gear 2, tooth bar 7, worm gear 9, worm shaft 5, control unit 8, returning spring 12, it is characterized in that: link to each other with pressure spring 1 in described worm shaft 5 rear ends, the front end of worm shaft 5 is connected with shell 3 with nut; Be provided with the gear 2 and the clutch ring 4 that has internal spline of internal spline respectively at the front end of worm shaft 5, the end face of clutch ring 4 is the umbrella shape spline, be meshed with worm shaft 5 end umbrella shape splines, with torque spring 6, form one group of overrunning clutch, the outside of gear 2 is provided with tooth bar 7, and an end of tooth bar 7 is meshed with gear 2, the other end of tooth bar 7 is provided with elbow 10 and returning spring 12, and it is installed in the control unit 8 that has groove 11.

When braking, braking locellus push rod promotes shell 3 and rotates around the camshaft axis along the direction of arrow, and tooth bar 7 moves down thereupon, because of control unit 8 is fixed, when the elbow on the tooth bar 7 10 is run into control unit 8 inner groovies 11 lower edge faces, finish normal travel, eliminated normal clearance.Because there is excessive gap to exist, braking locellus push rod continues to promote shell 3 and rotates, but these hour rack 7 controlled unit 8 inner groovies, 11 lower edge faces block and can not move down again, be forced to move, driven gear 2 rotates in the counterclockwise direction, this moment, left-handed torque spring 6 slipped over gear 2, ran into brake drum and finished overtravel until brake lining, had eliminated excessive gap.Then brake the locellus push rod and finish springing stroke, brake lining tightly is pressed on the brake drum and implements braking.During loosen the brake, braking locellus push rod return is at first eliminated springing stroke, and when push rod continued return, the elbow 10 on the tooth bar 7 began to leave control unit 8 inner groovies 11 lower edges and moves towards last, eliminates normal travel until the upper edge face of running into groove 11.Push rod continues return, shell 3 drives in tooth bar 7 continuation and moves, but this moment elbow 10 by groove 11 upper edge faces block can't on move, be forced to move down, driven gear 2 rotates along clockwise direction, and this moment, torque spring 6 was pressed on the internal spline face of gear 2, clutch ring 4, clutch is in identical state, drive worm shaft 5 and turn over an angle, thereby make worm gear 9 turn over a corresponding angle, wearing piece is opened and finish the adjusting in excessive gap.Tooth bar 7 all is returned to the home position in braking locellus push rod and the adjustment arm.

Braking afterwards (adjusting) the process said process that will constantly circulate is till reaching the optimum position.

Claims (3)

1, the adjustment arm of adjusting braking gap automatically is made up of pressure spring (1), worm shaft (5), gear (2), tooth bar (7), control unit (8), it is characterized in that: the rear end at described worm shaft (5) links to each other with pressure spring (1), and the front end of worm shaft (5) links to each other with shell (3) with nut; Gear (2) that is provided with internal spline and the clutch ring (4) that is provided with internal spline are arranged respectively on described worm shaft (5), and insert respectively with the two ends of torque spring (6) in the internal tooth of gear (2) and clutch ring (4).

2, adjustment arm according to claim 1 is characterized in that: described worm shaft (5) front axle is provided with the umbrella shape spline, and the inner of clutch ring (4) also is provided with corresponding umbrella shape spline, and with torque spring (6), forms one group of overrunning clutch.

3, adjustment arm according to claim 1, have and be characterised in that: be provided with tooth bar (7) in the described outside that has the gear (2) of internal spline, one end of tooth bar (7) is meshed with gear (2), the other end of tooth bar (7) is provided with elbow (10), is installed in the brake control unit (8) that has groove (11).

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