CN2251070Y

CN2251070Y - Automatic braking regulator

Info

Publication number: CN2251070Y
Application number: CN 96207653
Authority: CN
Inventors: 张江海
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-12
Filing date: 1996-04-12
Publication date: 1997-04-02
Anticipated expiration: 2006-04-12

Abstract

The utility model relates to an automatic braking regulator, particularly an automatic braking regulator used for trailers. The utility model is composed of a main outer casing, a ratchet wheel, a ratchet wheel pawl, a braking draw rod, a transmission device, a sensor and an outer cover plate, wherein the ratchet wheel is provided with a plurality of first oblique teeth; the ratchet wheel pawl is provided with at least one second oblique tooth for engaging with the first oblique teeth so as to cause the ratchet wheel to freely rotate towards one direction and cause a braking hoof sheet to generate a braking function. When the braking draw rod is driven to be toward the braking direction and freely rotate towards the free rotation direction of the ratchet wheel, the braking hoof sheet generates the braking function; when the braking hoof sheet is worn to the definite degree, the ratchet wheel is driven to forwards move a tooth range by the braking draw rod, and the braking hoof sheet recovers to the original braking clearance.

Description

The self-actuating brake regulator

A kind of self-actuating brake regulator is especially for the self-actuating brake regulator of trailer.

Existing brake regulator is to use a drive socket and to adjust bolt, wherein adjusting bolt is to be used to adjust braking gap, bolt is adjusted in rotation can drive the drive socket rotation and the braking gap of adjustment brake shoes and brake drum face, to adjust brake sensitivity, after its shortcoming is long-term the use, because of causing the braking gap between brake shoes and brake drum, the brake shoes abrasion become big, must often rotate and adjust bolt, with decohere, the engagement of adjusting bolt and drive socket in addition is not quite tight, adjusts the easily loosening brake sensitivity variation that makes of the long-term use of bolt.

The purpose of this utility model provides a kind of self-actuating brake regulator with automatic adjustment braking gap function, overcome the long-term apply the brakes of brake shoes gap and become big, often adjust bolt and adjustment bolt and often adjust the loosening problem that makes brake sensitivity variation of generation, reach frequent maintenance brake sensitivity.

The purpose of this utility model can reach by following measure; An outer cover plate that contains the main shell body of an opening and seal this opening, one comprises that the ratchet assembly of ratchet and ratchet pawl is contained on the frame, this ratchet has a plurality of helical teeth, has first helical teeth of engagement second helical teeth on the ratchet pawl at least; Bracket arm is stretched elongate bars by base portion and and is formed, and this base portion is located in the main shell body, stretches elongate bars and stretches out the main shell body and be connected with brake cylinder; Transmission device comprises drive socket and driving disk, and transmission device can move bracket arm and reach ratchet; On the main shell body, be provided with the sensor whether the sensing brake shoes will be changed in addition.The purpose of this utility model can also reach by other measures, the center of its ratchet is provided with first croze hole, the bracket arm base portion is a disc-shaped structure, a circular hole is established at the base portion center, base surface is a plurality of first card teeth, one croze tooth is arranged on the drive socket outer surface, its internal surface has one second croze hole, cooperate the driving brake shoes with the brake shoes driveshaft, there is the 3rd croze hole to cooperate in the driving disk with the croze tooth of drive socket, this croze tooth cooperates with first croze hole of ratchet, and there are a plurality of second card teeth of a plurality of first card teeth of engagement bracket arm on this driving disk surface; Another side at the bracket arm base portion has a plurality of protrusions, base is spaced apart equidistantly, a plurality of arc protrusions are arranged on the outer cover plate surface, an arc groove is arranged in this arc protrusion, outer cover plate closely is incorporated into bracket arm in the main shell body to embed an annular spring leaf.Its sensing thing and sensor are a tinsel, and the sensing thing is contained in around the driving disk, and sensor is located on the main shell body in order to detect sensed thing, establish the power supply and the beacon of expression sensing result in the sensor; Establish the plurality of fixed hole on the elongate bars and be connected stretching of bracket arm with the driveshaft of vehicle brake pneumatic cylinder.When sensor two tinsels contacted, the bright driver of beacon was changed brake block.

The drawing explanation of accompanying drawing:

Fig. 1 is the three-dimensional exploded view of the utility model self-actuating brake regulator.

Fig. 2 is the utility model ratchet action schematic representation (when the brake air cylinder pressure does not move).

Fig. 3 is the utility model ratchet action schematic representation (during the action of brake air cylinder pressure).

Fig. 4 is a bracket arm scheme of installation of the present utility model.

Fig. 5 is an outer cover plate structural drawing of the present utility model.

Fig. 6 is the A-A sectional drawing of accompanying drawing 5.

Fig. 7 is the stereoscopic figure of self-actuating brake regulator of the present utility model.

Further specify as follows to the utility model embodiment in conjunction with the accompanying drawings:

The utility model self-actuating brake regulator (Fig. 1, Fig. 7) comprises main shell body 1, ratchet 4, ratchet pawl 3, transmission cylinder 8, driving disk 11, bracket arm 15, annular spring leaf 21 and outer cover plate 22; This ratchet pawl 3 is fixed on the main shell body 1, a plurality of first helical teeth 6 are arranged on the ratchet 4, there is first keyhole 5 its inside, a plurality of second helical teeth 7 are arranged to mesh first helical teeth on the ratchet pawl, make ratchet 4 can unidirectionally freely rotate (the A direction of arrow of Fig. 2), the rotation of ratchet 4 can make the brake shoes action and produce braking action.Bracket arm 15 comprises stretches elongate bars 18 and base portion 16, stretches elongate bars 18 and exceeds the main shell body along stretching, and this base portion 16 is that a disc-shaped structure is dissolved in the main shell body 1.This is stretched has plurality of fixed hole 19 to connect the driveshaft of brake air cylinder pressure on the elongate bars, there is a circular hole 17 at the center of base portion 16, and the one side of base portion 16 has a plurality of protrusions 20, and the another side of base portion 16 has the first card tooth 14.The outer surface of drive socket 8 is provided with croze tooth 9, and its internal surface has one second croze hole 10, and driving disk 11 outer surfaces are established the second card tooth 12, and its inside is provided with the 3rd croze hole 13.The croze tooth 9 of drive socket 8 can be matched with in first croze hole 5 of ratchet 4, the 3rd croze hole 13 of driving disk 8, can be matched with the croze tooth 9 of drive socket 8, the first card tooth 14 of the base portion of bracket arm 15 can be matched with the second card tooth 12 (Fig. 4) of driving disk 11, thus bracket arm 15 can borrow drive socket 8 make with the effect of driving disk 11 ratchet 4 along folk prescription to rotating (direction shown in the arrow B among Fig. 4).Second croze hole 10 of drive socket 8 can be connected with the brake shoes driveshaft, and the commentaries on classics of ratchet 4 is conveyed to brake shoes.Outer cover plate 22 (Fig. 1) is used to cover the breach of main shell body 1, and various elements place main shell body 1, and annular spring leaf 21 can make bracket arm 15 more closely be packaged in the main shell body 1.

Having a plurality of first helical teeth 6 (Fig. 2) in the ratchet 4 makes the ratchet 4 only can be along one-way rotation (direction shown in the arrow among the figure) with second helical teeth 7 of mesh ratchet gear pawl 3.When brake shoes may wear to a certain degree, because of the braking gap between brake shoes and brake drum face becomes big, ratchet 4 was because of the pulling of the bracket arm tooth width of cloth that advances automatically, and braking gap is replied initial value.When brake cylinder drove bracket arm 15 rotations, ratchet 4 slightly rotated, and made brake shoes produce braking action.(Fig. 3).When the brake cylinder driving force was removed, ratchet 4 can slightly turn round, with the second helical teeth 7 complete closed states (Fig. 2) of answer with ratchet pawl 3.

Driving disk 11 has the second card tooth 12, the base portion 16 of bracket arm 15 has the first card tooth 14, the first card tooth 14 and 12 engagements of the second card tooth can make bracket arm 15 drive driving disk 11 and only rotate (direction shown in the arrow B) along single direction, be convenient to adjust with manual mode the braking gap of brake drum.When adjusting braking gap with manual mode, only need bracket arm 15 is rotated and 11 rotations of drive driving disk along a B direction, the rotation of this driving disk can drive the brake shoes driveshaft and rotate, and the driving brake shoes, be driven to the position that produces braking action when brake shoes, loosen bracket arm 15 then, this bracket arm will slightly turn round the distance of (the revolution amplitude is less than a tooth width of cloth), and braking action promptly produces in this slight distance.

Cover plate 22 outside the utility model (Fig. 5, Fig. 6) has a plurality of

arc protrusions

24, and 24 of each arc protrusions have a groove 23, this groove 23 match with protrusion 20 on the bracket arm 15 (Fig. 2).For strengthening the installation tightness of self-actuating brake regulator, use annular spring leaf 21, be to be installed on the arc groove 25 of arc protrusion 24.Stretching of bracket arm 15 can be provided with plurality of fixed hole 19 to cooperate the brake cylinder of different heights on the elongate bars 18 in addition.

The utility model can be set up a detective device, when brake shoes wears away to a certain degree, must change, detective device is a driver so that change, this detective device is made of sensor and sensing thing, be respectively a tinsel, sensed thing is located at driving disk 11 appropriate locations, and sensor can be detected this sensing thing by a hole of main shell body 1, when sensed thing moves with driving disk 11 and sensor approaching, this sensor is just exported a signal and is changed shoe plate via the beacon driver that power supply unit is housed, and this detective device also can be a kind of magnetic detective device.

The utility model has the advantage of: have the function of automatic adjustment braking gap, must Warning lamp gives driver's signal in order in time change brake shoes, in addition through making for a long time when wanting With after, loosening phenomenon can not take place its mechanical organ makes the sensitive variation of brake, this automatic brake The car adjuster is applicable to the vehicle of different brake cylinder height.

Claims

1, a kind of self-actuating brake regulator, particularly a kind of self-actuating brake regulator that is applied to trailer, generally form, it is characterized in that: mainly comprise the main shell body of an opening and seal the outer cover plate of this opening by brake air cylinder pressure, driveshaft, brake regulator, brake drum and brake shoes etc.; One comprises that the ratchet assembly of ratchet and ratchet pawl is contained on the main body cover, and this ratchet has a plurality of helical teeth, has first helical teeth of engagement second helical teeth on the ratchet pawl at least; Bracket arm is stretched elongate bars by base portion and and is formed, and this base portion is located in the main shell body, stretches elongate bars and stretches out the main shell body and be connected with brake cylinder; Transmission device comprises drive socket and driving disk, and transmission device can move bracket arm and reach ratchet; On the main shell body, be provided with the sensor whether the sensing brake shoes will be changed in addition.

2, self-actuating brake regulator according to claim 1, it is characterized in that: there is one first croze hole at the center of this ratchet, the bracket arm base portion is a disc-shaped structure, a circular hole is established at the base portion center, base surface is a plurality of first card teeth, one croze tooth is arranged on the drive socket outer surface, its internal surface has one second croze hole to cooperate the driving brake shoes with the brake shoes driveshaft, there is the 3rd croze hole to cooperate in the driving disk with the croze tooth of drive socket, this croze tooth cooperates with first croze hole of ratchet, and there are a plurality of second card teeth of a plurality of first card teeth of engagement bracket arm on this driving disk surface.

3, self-actuating brake regulator according to claim 2, it is characterized in that: the another side of bracket arm base portion has a plurality of protrusions, it is spaced apart equidistantly, a plurality of arc protrusions are arranged on the outer cover plate surface, one arc groove is arranged to embed an annular spring leaf in this arc protrusion, outer cover plate closely is incorporated into bracket arm in the main shell body.

4, self-actuating brake regulator according to claim 1, it is characterized in that: this sensor and sensing thing are a tinsel, the sensing thing is contained in around the driving disk, and sensor is located on the main shell body, establishes the power supply and the beacon of expression sensing result in the sensor.

5, self-actuating brake regulator according to claim 1 is characterized in that: the stretching of bracket arm established the plurality of fixed hole and is connected with the driveshaft of vehicle brake pneumatic cylinder on the elongate bars.