CN100535472C

CN100535472C - Automatic regulating arm for automobile braking

Info

Publication number: CN100535472C
Application number: CNB2006100169180A
Authority: CN
Inventors: 韩兆瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-07
Filing date: 2006-06-07
Publication date: 2009-09-02
Anticipated expiration: 2026-06-07
Also published as: CN101086284A

Abstract

Automobile brake automatic adjust arm belongs to transport technical field. It includes shell, worm gear matched with brake cam axle in shell and adjusting worm driving worm gear, the improvements are: the pneumatic pushing bar end is equipped with deflector rod. The shell is equipped with two racks in itself. The position of rack on the worm is equipped with ratchet, the ratchet periphery is equipped with separation sleeve of fracture. The separation sleeve is equipped with two adjusting gears which are engaged with rack separately. The adjusting gear is equipped with pawls. The separation sleeve in the enlargement gap device is equipped with a section with integral circumference and ring platform, the ring platform is equipped with separating column gear which is equipped with boss. The gear also is equipped with one section of rib which fore end is oblique plane. The corresponding rib position is equipped with the extension spacer pin which is fixed on the shell. The positive effects of the invention are: full-automatic tracking and adjustment; the whole uses mechanical components, it is durable and has no fault; it is adjustable in the return-stroke, the drag force is small, the operation is flexible and the components are not injured; it achieves the two-way adjust function both turning up and turning down.

Description

Automatic regulating arm for automobile braking

Technical field

The invention belongs to the transportation technology field, be specifically related to brake device for car.

Background technique

In order to improve goods vehicle, the motorbus traveling security that adopts aerobraking, keeping the best clearance of braking plate and braking hub is important step.For this reason, on the cursor of the brake camshaft of this type of automobile in the past connection air-leg adjustment, the locking framework of being made up of worm and worm gear is housed all.By rotary worm, rotate worm gear, make camshaft relatively rotate arm and rotate corresponding angle, add big cam to the shoe plate action radius, the shoe plate and the gap of braking hub are returned to the distance of initial setting, form and be called as the member of adjusting arm now.The adjustment mode that existing adjustment arm provides mostly is human spanner rotary worm.The existing shortcoming of this adjustment arm at first is to belong to intermittently to adjust, and between twice adjustment in front and back, is not to be in optimum distance all the time between braking plate and the braking hub, but is changed to the ultimate range of permission by optimum distance.Therefore there is the relatively poor situation of braking effect.Next be braking plate and braking hub between the wearing and tearing maximal clearance that allowed, set according to distance travelled usually, or driver in brake operating sensation and draw, deviation is bigger.May cause releasing cam to cross the position or do not reset, brake blunt, drag, shoe plate with brake hub and do not separate, severe patient is on fire, blow out.Above-mentioned shortcoming based on the artificial adjustment arm of adjusting of need, some self-adjusting technological schemes had appearred afterwards, but still there is the actual shortcoming of using of some influences, as use in the scheme of control circuit and adjustment drive motor, what cannot say for sure to demonstrate,prove electrical apparatus element has identical working life with mechanical component, break down between the spreadable life, will directly influence traffic safety.The automatic adjustment scheme of other mechanical structures mostly is in the braking afterburner process and adjusts, and adjusts underaction, and the member wearing and tearing are very fast.

Summary of the invention

The purpose of this invention is to provide a kind of automatic regulating arm for automobile braking, overcome the aforementioned deficiency that the improvement technological scheme of the adjustment arm that uses in the prior art and proposition exists.

Automatic adjustment arm of the present invention comprises housing, the worm gear that cooperates with brake camshaft in the housing, drive the adjustment worm screw of worm gear, the improvement of being done is: be extended with driving lever on the hinged ear of air-leg end and adjustment arm, in adjusting arm housing, have two parallel to each other, be positioned at the worm screw both sides, vertical adjustment tooth bar that dwindles gap (braking plate and braking hub gap) that also shifts to install up and down with worm screw and the adjustment tooth bar that enlarges gap (braking plate and braking hub gap), driving lever inserts in the hole or groove of tooth bar tail end, there are two circle ratchet or two ratchets the position of corresponding two tooth bars on worm screw, have with housing on the ratchet circumferential surface and fix, surround a part of ratchet and expose the separation sleeve that a part of ratchet has fracture, an end of the relative ratchet of incision position on the separation sleeve, have and promote the slant edge that ratchet breaks away from ratchet, on separation sleeve, install respectively and two and tooth bar engagement, and the adjustment gear of relative separation sleeve slip, adjust on the gear face ratchet is arranged, the directed in opposite of two ratchets, pawl axis was preceding when the installation direction of ratchet on gear was braking, the pawl point after, the separation sleeve that enlarges in the clearance mechanism stretches into the interior part of gear axis hole, complete one section of circumference is arranged, part beyond the gear axis hole, radially thickening forms the ring platform, the ring platform has the splitter of axial setting on the end face of gear one side, on the ring platform circumferential surface axial groove is arranged, this groove is slidingly matched with the key or the pin that are fixed on the housing, having towards splitter one side at gear on the end face of ring platform is the boss of oblique ascension face, have at gear and also have one section fin on the end face of boss, the end face of fin head end be in the center of circle on circumferencial direction the inclined-plane of oblique tail end, corresponding ring platform and the position, space after gear separates are fixed on to have by spring on the housing and hold, and can stretch into the expansion isolating pin in this space.

Working procedure of the present invention is:

According to the interstice coverage of determined braking plate and braking hub, when the adjustment arm is initially assembled, will dwindle the stop of the slip of ratchet point on separation sleeve in the clearance adjustment mechanism, when braking, be set in the edge of separation sleeve fracture.Enlarge clearance adjustment mechanism initially assemble the time-division from post with separate boss and hold mutually, gear and Huan Tai are in separated state.Spacer pin corresponding ring platform on housing moves relative to gear goes into the space stroke that fin rotated when the distance of spacer pin and fin head end equaled the normal brake application gap.

Not during super scope, the ratchet that dwindles in the clearance mechanism slides on separation sleeve, does not contact ratchet in the gap of braking plate and braking hub, when the gap becomes big super scope, the gear corner increases, and the ratchet point enters the separation sleeve fracture, the engagement ratchet, promoting worm screw during return movement rotates, the gap is turned down, return to the gap of setting, adjust the arm corner and diminish, the ratchet stroke shortens, and the ratchet point no longer enters the separation sleeve fracture.Strengthen once more when transfiniting when the gap, repeat above process.

When the normal brake application gap, the fin in the expansion clearance mechanism touches and compresses spacer pin, gear and the closing of ring platform, and the ratchet point partly returns along the separation sleeve full circumferences, does not act on ratchet.When the gap accident occurring and reduce to transfinite, the gear rotational travel reduces, fin touches less than spacer pin, still is in separated state with the ring platform in the gear backhaul, and the backhaul of ratchet point is through the separation sleeve fracture, effect ratchet rotary worm, enlarge the gap, during the separation sleeve fracture edge of ratchet motion, push away ratchet by the slant edge at fracture edge, after the gap enlargement, recover operating state before this.

Good effect of the present invention is:

Realized the full-automatic tracking adjustment.Regulating mechanism all adopts mechanical part, and is durable in use, fault-free.Regulating mechanism is to adjust in the backhaul in braking, and resistance is little, flexible operation, do not damage member.Have and to transfer greatly less than the gap of setting range automatically, stop therefore and the bigger consequence of harm that produces, realized not only transferring two-way adjustment function big but also that turn down.

Description of drawings

Fig. 1 is a broken section plan view of the present invention;

Fig. 2 is the A-A sectional view;

Fig. 3 is the B-B sectional view;

Fig. 4 is the C-C sectional view;

Fig. 5 is gear, separation sleeve, ratchet, ratchet, worm screw combination relation schematic representation;

Fig. 6 enlarges separation sleeve stereogram in the clearance adjustment mechanism for the present invention;

Fig. 7 enlarges clearance adjustment mechanism middle gear stereogram for the present invention;

Separation sleeve and Gear combination concern stereogram to Fig. 8 in the clearance adjustment mechanism for the present invention enlarges.

Embodiment

Provide embodiments of the invention below in conjunction with accompanying drawing.

Manufacture as shown in Figure 1 comprise shell 1, worm screw 2, the adjustment arm of worm gear 3.Catch bar and adjustment arm are made the shape of turning that has driving lever 4 of making as shown in Figure 1.Manufacture an end and have two toothed rack 5 that driving lever stretches into the hole, in the chute in the shell of packing on worm screw two side bodies.The ratchet that processes two circle ratchets, 6, two circle ratchets on worm screw is oblique opposite.Manufacturing the tube-like thin-wall that fracture is axially arranged dwindles the separation sleeve 7 in the clearance mechanism and enlarges separation sleeve 8 in the clearance mechanism.Separation sleeve 8 has ring platform 8H and part complete circle side face 8w is arranged.Separation sleeve is enclosed within ratchet position on the worm screw.Separation sleeve 7 is fixed with housing.Fixedly separated post 9 on the separation sleeve 8 ring you faces, Huan Tai opens axial groove in the side, fixedly stretches into the key of this groove on the housing, restriction separation sleeve 8 rotating relative to housing.Manufacture the gear 10 that dwindles in the clearance mechanism, ratchet 11 is installed on the gear face.Gear 10 rotating being contained on the separation sleeve 7 and with a tooth bar are meshed.Manufacture the gear 12 that enlarges in the clearance mechanism, gear face is installed ratchet 13.The end face that ratchet 13 is installed at gear is provided with separation boss 14, and the equidirectional side of boss ratchet point is the inclined-plane 14s that edges up.On the gear face of rotatingshaft one end of ratchet, establish one section half fin 15 that radially accounts for gear face.Fin is inclined-plane 15x at the tail end of the center of circle oblique ratchet on the direction of circumference away from the end face of the head end of ratchet.There is the ring platform of the relative separation sleeve 8 of an end of ratchet to fit together as shown in Figure 8 gear 12, when just adorning, makes splitter 9 and separate boss 14 and hold mutually.Corresponding ring platform 8H moves relative to gear 12 and go the expansion isolating pin 16 that is held by spring into space mounting, the stroke of fin rotation when the distance of spacer pin and fin 15 head ends equals the normal brake application gap on housing.Below promptly finish enforcement of the present invention.

Claims

1, automatic regulating arm for automobile braking, comprise housing, the worm gear that cooperates with brake camshaft in the housing, drive the adjustment worm screw of worm gear, it is characterized in that: be extended with driving lever on the hinged ear of air-leg end and adjustment arm, in adjusting arm housing, have two parallel to each other, be positioned at the worm screw both sides, the vertical expansion gap adjustment tooth bar that dwindles gap adjustment tooth bar and expansion braking plate and braking hub gap that dwindles braking plate and braking hub gap that also shifts to install up and down with worm screw, driving lever inserts in the hole or groove of tooth bar tail end, there are two circle ratchet or two ratchets the position of corresponding two tooth bars on worm screw, ratchet on two circle ratchets or two ratchets is oblique opposite, have with housing on the ratchet circumferential surface and fix, surround a part of ratchet, exposing a part of ratchet has the separation sleeve of fracture, an end of the relative ratchet of incision position has the slant edge that promotes ratchet disengaging ratchet on the separation sleeve, on separation sleeve, install respectively and two tooth bar engagements, and the adjustment gear of relative separation sleeve slip, adjust on the gear face ratchet is arranged, the directed in opposite of two ratchets, pawl axis was preceding when the installation direction of ratchet on gear was braking, the pawl point after, the separation sleeve that enlarges in the clearance mechanism stretches into the interior part of gear axis hole, complete one section of circumference is arranged, the part that the gear axis hole is outer, radially thickening forms the ring platform, the ring platform has the splitter of axial setting on the end face of gear one side, on the ring platform circumferential surface axial groove is arranged, this groove is slidingly matched with the key or the pin that are fixed on the housing, having towards splitter one side at gear on the end face of ring platform is the boss of oblique ascension face, have at gear and also have one section fin on the end face of boss, fin away from the end face of the head end of ratchet be in the center of circle on circumferencial direction the inclined-plane of oblique ratchet tail end, corresponding ring platform and the position, space after gear separates are fixed on the housing, hold by spring, can stretch into the expansion isolating pin in this space.