CN201047412Y

CN201047412Y - Vehicle braking automatic regulation arm

Info

Publication number: CN201047412Y
Application number: CNU2006200287958U
Authority: CN
Inventors: 韩兆瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-24
Filing date: 2006-05-24
Publication date: 2008-04-16
Anticipated expiration: 2016-05-24

Abstract

The utility model provides an automatic brake automatic adjusting arm, belonging to the transportation field. The utility model implements the backhaul automatic bidirectional tracking adjustment of all mechanical components, and overcomes the shortages of existing adjusting arms of large misalignment, non-flexibility and large abrasion. The utility model comprises a shell, and a worm wheel and a worm in the shell. The utility model is characterized in that a pneumatic push rod and the connecting end of an adjusting arm hinge ear are provided with a transversely extended pulling rod; the shell is internally provided with two adjusting racks; the pulling rod is inserted into a hole at the tail of the rack; the worm is provided with two rings of ratchet or ratchet wheels with reverse directions; the ratchet wheel is provided with an isolation sleeve with fractures; the isolation sleeve is provided with an adjusting gear engaged with the rack; the adjusting gear is provided with a detent; the internal part of the shaft hole of the gear shaft of the isolation sleeve in an enlarging clearance mechanism is provided with one section with full circumference; the exterior of the shaft hole is provided with a cirque platform which is provided with a separation column; the gear is provided with a convex platform and a convex arris; the clearance between the gear and the isolation sleeve cirque platform is provided with a spacer pin. The utility model applied to the automatic adjustment of automobile brake toe and brake hub has the advantages of small resistance, flexible operation, low malfunction ratio, and bidirectional adjustment of turning up and turning down.

Description

A kind of automatic regulating arm for automobile braking

Technical field

The utility model belongs to the transportation technology field, is 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 connection air-leg of this type of automobile in the past whole, the locking framework of the adjustment of being made up of worm and worm gear is housed all, pass through 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 utility model provides a kind of automatic regulating arm for automobile braking, all adopt mechanical component, be implemented in two-way automatic adjustment in the braking backhaul, overcome vulnerable components that the improvement technological scheme of the adjustment arm that uses in the prior art and proposition exists, adjust deficiencies such as dumb.

Automatic adjustment arm of the present utility model comprises housing, the worm gear that cooperates with brake camshaft in the housing, the adjustment worm screw of driving worm gear.The improvement of being done is: air-leg has the driving lever that crosses out with the hinged ear connecting end of adjustment arm.Adjust have in the arm housing two parallel to each other, be positioned at the worm screw both sides, vertical with worm screw and shift to install up and down dwindle braking plate with braking hub gap with enlarge braking plate and the adjustment tooth bar of braking the hub gap, in the hole or groove of driving lever insertion tooth bar tail end.Dwindling the gap and enlarging gap two circle ratchet or two ratchets of corresponding two tooth bars arranged on the worm screw, and two ratchet ratchet directions are opposite.There is the exposed portions serve ratchet that the separation sleeve of fracture is arranged on the ratchet circumferential surface.Isolating the edge be with fracture one end, to have protruding be the rib on inclined-plane to the center of circle, end.The relative housing of separation sleeve that dwindles on the ratchet of gap is fixed.The adjustment gear that meshes, can rotate on separation sleeve with two tooth bars is being installed respectively on the separation sleeve.Adjusting on the gear face has ratchet, and the installation direction of ratchet on gear is the gear sense of rotation during by braking, and pawl axis is preceding.Enlarge separation sleeve on the ratchet of gap and stretch into part in the gear axis hole except that a section of fracture is arranged, also have complete one section of circumference.Part beyond the gear axis hole, the radially outward 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, the key or the pin that are fixed on the housing and can slide in groove are arranged in the axial groove.Enlarge clearance mechanism adjustment gear and on the end face of ring platform, ratchet is installed.There is the separation boss at ratchet point place, and the end face that separates the far-end of the relative ratchet of boss is the oblique ascension face.Pawl axis one side has one section fin, the end face of the far-end of the relative ratchet of fin be from the center of circle on circumferencial direction the inclined-plane of oblique ratchet.The corresponding position, space that enlarges when the adjustment gear separates with isolation collar platform in the clearance mechanism is fixed on the housing, is held by spring, can stretch into the expansion isolating pin in space.Just during dress, dwindle the edge that the slip stop of ratchet pawl point on separation sleeve in the clearance adjustment mechanism is set in the separation sleeve fracture.Splitter in the expansion clearance adjustment mechanism on the isolation collar platform holds the stroke that fin rotated when the distance of the fin on expansion isolating pin and the gear equaled the normal brake application gap mutually with the boss that separates on the gear.

Good effect of the present utility model is:

Realized the full-automatic tracking adjustment; Regulating mechanism all adopts mechanical part, 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 the utility model broken section plan view;

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 utility model;

Fig. 7 enlarges clearance adjustment mechanism middle gear stereogram for the utility model;

Fig. 8 concerns stereogram for separation sleeve and Gear combination in the utility model expansion clearance adjustment mechanism.

Embodiment

Provide embodiment of the present utility model below in conjunction with accompanying drawing.

Consult Fig. 1, present embodiment comprises the existing housing 1 of adjusting arm, the worm gear 3 that cooperates with brake camshaft in the housing, the adjustment worm screw 2 of driving worm gear.The hinged shape driving lever 4 that turns on the hinge axis hole of adjusting original connection air-leg on the arm.Consult Fig. 1-Fig. 4, adjust have in the arm housing two parallel to each other, be positioned at the worm screw both sides, vertical with worm screw and shift to install up and down dwindle braking plate with braking hub gap with enlarge braking plate and brake adjustment tooth bar 5-1, the 5-2 in hub gap.Turn shape driving lever one end and insert in the hole or groove of tooth bar tail end, an end is connected on the air-leg.Consult Fig. 1, Fig. 3-Fig. 5, dwindling the gap and enlarging gap two circle ratchet or two ratchet 6-1,6-2 of corresponding two tooth bars arranged on the worm screw, two ratchet ratchet directions are opposite.Consult Fig. 3, Fig. 5, have the exposed portions serve ratchet that the

separation sleeve

7 and 8 of fracture is arranged on the ratchet circumferential surface, isolate the edge that is with fracture one end have shown in Figure 6 protruding be the rib 17 on inclined-plane to the center of circle, end, the separation sleeve 7 relative housings that dwindle on the ratchet of gap are fixed.Consult Fig. 3, Fig. 4, Fig. 5, Fig. 8, the

adjustment gear

10,12 that meshes, can rotate on separation sleeve with two tooth bars is installed respectively on

separation sleeve

7 and 8, adjust on the gear face ratchet 11,13 is arranged, the installation direction of ratchet on gear is: the gear sense of rotation during by braking, pawl axis is preceding.Consult Fig. 6, enlarge separation sleeve 8 on the ratchet of gap and stretch into part in the gear axis hole except that a section of fracture is arranged, also have one section complete 8w of circumference.Part beyond the gear axis hole, radially outward thickening form ring platform 8H, and the ring platform has the splitter 9 of axial setting on the end face of gear one side, on the ring platform circumferential surface axial groove are arranged, and the key or the pin that are fixed on the housing and can slide in groove are arranged in the axial groove.Consult Fig. 7, enlarge clearance mechanism and adjust gear installation ratchet 13 on the end face of ring platform, there is the boss 14 of separation at ratchet point place, the end face that separates the relative ratchet far-end of boss is oblique ascension face 14s, pawl axis one side has one section fin 15, the end face of the relative ratchet far-end of fin be from the center of circle on circumferencial direction the inclined-plane 15x of oblique ratchet.Consult Fig. 8, the corresponding position, space that enlarges when the adjustment gear separates with isolation collar platform in the clearance mechanism is fixed on the housing, is held by spring, can stretch into the expansion isolating pin 16 in space.

When adjustment arm of the present utility model was just adorned, after the interstice coverage of selected braking plate and braking hub, the stop that dwindles the slip of pawl point on separation sleeve 7 of ratchet 11 in the clearance adjustment mechanism during braking was set in the edge of separation sleeve fracture.Splitter 9 in the expansion clearance adjustment mechanism on the isolation collar platform 8H holds mutually with the boss 14 that separates on adjusting gear 12, adjusts gear 12 and is separated with isolation collar platform 8H.The stroke that fin rotated when the distance of spacer pin 16 and fin 15 equaled the normal brake application gap.

Working procedure of the present utility model is: in braking and the return process, driving lever 4 is adjusted arms relatively round corner, forms advancing of ratchets 11,13 or retreats through tooth bar 5-1,5-2 and gear 10,12.Not during super scope, the ratchet 11 that dwindles in the clearance mechanism slides on separation sleeve 7, does not contact ratchet 6-1 in the gap of braking plate and braking hub, when the gap becomes big super scope, gear 10 corners increase, and ratchet 11 pawl points enter separation sleeve 7 fractures, mesh ratchet gear 6-1, promoting worm screw 2 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 pawl point of ratchet 11 no longer enters the fracture of separation sleeve 7.Strengthen once more when transfiniting when the gap, repeat above process.

When the normal brake application gap, the fin 15 in the expansion clearance mechanism on the adjustment gear 12 touches and compresses spacer pin 16, and gear 12 and ring platform 8H are close, and the pawl point of ratchet 13 returns along separation sleeve full circumferences part 8w, does not act on ratchet 6-2.When the gap accident occurring and reduce to transfinite, gear 12 rotational travel reduce, fin 15 touches less than spacer pin 16, because spacer pin 16 does not withdraw from, still be in separated state with ring platform 8H in gear 12 backhauls, ratchet 13 backhauls are through separation sleeve fracture, ratchet 13 mesh ratchet gear 6-2, rotary worm 2 enlarges the gap.When ratchet 13 moves to separation sleeve 8 fracture edges, it is pushed away ratchet, after the gap enlargement, recover operating state before this by the angled end-face of the inside fin 17 at fracture edge

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: air-leg has the driving lever that crosses out with the hinged ear connecting end of adjustment arm, adjust have in the arm housing two parallel to each other, be positioned at the worm screw both sides, vertical dwindling braking plate and braking the hub gap and enlarge braking plate and the adjustment tooth bar in braking hub gap of also shifting to install up and down with worm screw, driving lever inserts in the hole or groove of tooth bar tail end, dwindling the gap and enlarging gap two circle ratchet or two ratchets of corresponding two tooth bars arranged on the worm screw, two ratchet ratchet directions are opposite, have on the ratchet circumferential surface expose a part of ratchet the fracture separation sleeve arranged, isolating the edge that is with fracture one end has protruding in the center of circle, the end is the rib on inclined-plane, the relative housing of separation sleeve that dwindles on the ratchet of gap is fixed, on separation sleeve, install respectively and two tooth bar engagements, and the adjustment gear that can on separation sleeve, rotate, adjust on the gear face ratchet is arranged, the installation direction of ratchet on gear is the gear sense of rotation by when braking, pawl axis is preceding, enlarge separation sleeve on the ratchet of gap and stretch into part in the gear axis hole except that a section of fracture is arranged, also has complete one section of circumference, part beyond the gear axis hole, the radially outward 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, the key or the pin that are fixed on the housing and can slide in groove are arranged in the axial groove, enlarge clearance mechanism adjustment gear and on the end face of ring platform, ratchet is installed, there is the separation boss at ratchet point place, the end face that separates the far-end of the relative ratchet of boss is the oblique ascension face, pawl axis one side has one section fin, the end face of the far-end of the relative ratchet of fin be from the center of circle on circumferencial direction the inclined-plane of oblique ratchet, the corresponding position, space that enlarges when the adjustment gear separates with isolation collar platform in the clearance mechanism is fixed on the housing, hold by spring, can stretch into the expansion isolating pin in space, when just adorning, the stop that dwindles the slip of pawl point on separation sleeve of ratchet in the clearance adjustment mechanism is set in the edge of separation sleeve fracture, splitter in the expansion clearance adjustment mechanism on the isolation collar platform holds the stroke that fin rotated when the distance of the fin on expansion isolating pin and the gear equaled the normal brake application gap mutually with the boss that separates on the gear.