CN106523549B - Self-boosting type drum brake with clearance self-regulating mechanism device - Google Patents
Self-boosting type drum brake with clearance self-regulating mechanism device Download PDFInfo
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- CN106523549B CN106523549B CN201611140418.8A CN201611140418A CN106523549B CN 106523549 B CN106523549 B CN 106523549B CN 201611140418 A CN201611140418 A CN 201611140418A CN 106523549 B CN106523549 B CN 106523549B
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- assembly
- preposition
- gap
- mutton
- pork
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
- F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
- F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
- F16D51/24—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots fluid actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
- F16D65/561—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting within the confines of a drum brake
- F16D65/562—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting within the confines of a drum brake arranged between service brake actuator and braking member, and subjected to service brake force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D2051/001—Parts or details of drum brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a kind of self-boosting type drum brakes with clearance self-regulating mechanism device.It further include clearance self-regulating mechanism device, back-plate assembly is mounted on vehicle frame, wheel cylinder assembly is fixedly mounted on the middle part of back-plate assembly end face, preposition hoof assembly and postposition hoof assembly are mounted on the two sides of back-plate assembly end face by identical pressure spring mechanism, clearance self-regulating mechanism device is mounted on preposition hoof assembly and postposition hoof assembly and supports pin connection with the hoof on back-plate assembly, preposition hoof assembly and postposition hoof assembly upper end are all connected to the hoof supporting pin on back-plate assembly, it is whole to carry out clearance self-regulating by the connection of clearance self-regulating mechanism device between preposition hoof assembly and postposition hoof assembly lower end.The present invention can adjust automatically drum-shoe clearance, can accurately adjust drum-shoe clearance in real time, and avoid the inconvenience manually adjusted and inaccuracy.
Description
Technical field
The present invention relates to hydraulic touch with the self-boosting type drum brake for adjusting gap ratchet assembly, more particularly, to
A kind of self-boosting type drum brake with clearance self-regulating mechanism device.
Background technique
Hydraulic self-boosting type drum brake be mostly used it is larger in load-carrying, on speed slower engineering truck and trailer, it is desirable that system
It is dynamic effective, steady.
Self-boosting type drum brake brake efficiency is high, is 2 times from shoe type drum brake brake efficiency of common neck,
Which results under same operating condition, self-boosting type drum brake is compared than other kinds of drum brake, abrasion
It is even more serious；When abrasion loss is excessive and wearing clearance between brake drum and friction plate again less than compensation when will lead to:
One, idle stroke is excessive: when being embodied directly in brake, the amplitude of service brake stroke be will increase；
Two, braking time is long: the excessive result directly resulted in of braking distance is exactly the time needed for identical speed is arrived in braking
It cannot achieve the effect that short time short distance stop when length, especially emergency braking；
Three, required liquid measure increases: so that friction plate is contacted even extruding with brake drum when braking just may be implemented to brake, when
When the gap of brake drum and friction plate is excessive, the piston stroke in wheel cylinder assembly will increase, required hydraulic oil also with
Increase；
What the self-boosting type drum brake that is mounted on automobile currently on the market used be all manually adjust brake drum and
The method in friction plate gap, manually adjusting the method for drum-shoe clearance, there are more defects:
One, adjust difficult: brake is mounted on automobile, to adjust drum-shoe clearance, and driver or staff is needed to lie prone
To vehicle bottom or automobile is risen, tool is visited into bottom plate hole inside tire and stirs the gear for adjusting gap ratchet assembly, it is very inconvenient；
Two, the bad control of the amplitude of accommodation: in the gear of manual toggle tune gap ratchet assembly, the number for adjusting footage is bad
Control, it is not of uniform size to be directly reflected in the drum-shoe clearance after mixing up: drum-shoe clearance is excessive, the effect of adjustment is not achieved, effectively
Action time is short, increases and adjusts number；Drum-shoe clearance is too small, it is easy to generate and dawdle between hoof drum, influence service performance, reduce
The service life of hoof, drum；
Three, regulating cycle can not determine: the period for manually adjusting self-boosting type drum brake be usually driver master worker with
It is determined by means of oneself experience, if the road conditions in entire running car period are more stable, maintenance period is about the same；
But often automobile will not be always maintained at identical road conditions in the process of moving, always have various accident or variation and occur,
Simultaneously, the abrasion condition of brake-shoe and brake drum can also be not quite similar, and maintenance period also just not necessarily, is easy in this way
Occur being braked using wearing heavier brake, or not may wear to the degree of wear for wanting maintenance also, improve maintenance at
This.
Summary of the invention
For the problem of hand adjustment brake clearance difficulty on the vehicle in the prior art of solution, the object of the invention is to mention
A kind of self-boosting type drum brake with clearance self-regulating mechanism device out, makes self-boosting type drum brake in the mistake used
Cheng Zhong, can in time, accurately adjust drum-shoe clearance.
To achieve the above object, the technical scheme is that
The present invention includes back-plate assembly, brake drum, preposition hoof assembly, postposition hoof assembly, brake-shoe baffle and braking
Wheel cylinder assembly further includes clearance self-regulating mechanism device, and back-plate assembly is mounted on vehicle frame, and wheel cylinder assembly is fixedly mounted
At the middle part of back-plate assembly end face, preposition hoof assembly and postposition hoof assembly are mounted on braking by identical pressure spring mechanism
The two sides of floor pan assembly end face, clearance self-regulating mechanism device is mounted on preposition hoof assembly and postposition hoof assembly and and back-plate
Hoof on assembly supports pin connection, and preposition hoof assembly and postposition hoof assembly upper end are all connected to the support of the hoof on back-plate assembly
Pin, it is whole to carry out clearance self-regulating by the connection of clearance self-regulating mechanism device between preposition hoof assembly and postposition hoof assembly lower end.
The preposition hoof assembly includes the preposition tendons of beef, mutton or pork, preposition Brake shoe lining, preposition upper return spring and installation
The preposition shoe plate of support connection function, one end of preposition upper return spring are played between the preposition tendons of beef, mutton or pork and preposition Brake shoe lining
It is connected on the preposition tendons of beef, mutton or pork, other end clasp joint to hoof supporting pin；The postposition hoof assembly includes the postposition tendons of beef, mutton or pork, postposition brake-shoe
Return spring and being mounted on plays support connection function on friction plate, postposition between the postposition tendons of beef, mutton or pork and postposition Brake shoe lining
Postposition shoe plate, one end of return spring is connected on the postposition tendons of beef, mutton or pork in postposition, other end clasp joint to hoof supporting pin；The braking
Wheel cylinder assembly includes wheel cylinder and piston mandril, and wheel cylinder is bolted on back-plate assembly end face, braking
The piston mandril apical grafting of wheel cylinder is at the fluting of the preposition tendons of beef, mutton or pork inside edge of preposition hoof assembly；The preposition tendons of beef, mutton or pork and the postposition tendons of beef, mutton or pork
Middle part passes through pressure spring mechanism and is connected to back-plate assembly, and the upper end of the preposition tendons of beef, mutton or pork and the postposition tendons of beef, mutton or pork abuts against hoof supporting pin
Multi-diameter shaft on, connected between the preposition tendons of beef, mutton or pork and the lower end of the postposition tendons of beef, mutton or pork by the tune gap ratchet assembly in clearance self-regulating mechanism device
It connects.
The pressure spring mechanism includes pressure spring pull rod, press spring base and pressure spring, and it is total that pressure spring pull rod one end is connected to back-plate
At, the other end pass through the preposition tendons of beef, mutton or pork perhaps the postposition tendons of beef, mutton or pork connect with press spring base press spring base and the preposition tendons of beef, mutton or pork or the postposition tendons of beef, mutton or pork it
Between pressure spring pull rod on be set with pressure spring.
The clearance self-regulating mechanism device includes adjusting gap ratchet assembly, adjusting gap bracing wire assembly, bracing wire guide holder, gap adjusted to dial
Plate and tune gap shift plate return spring, bracing wire guide holder are hingedly mounted in the middle part of the preposition tendons of beef, mutton or pork of preposition hoof assembly by sleeve pin,
Preposition upper return spring one end end axially passes through sleeve pin and forms clasp joint, and adjusting gap shift plate is approximate L shaped plate, L shaped plate
Middle part is linked up with by gib head in the lower part of the preposition tendons of beef, mutton or pork, is formed between gap shift plate and the preposition tendons of beef, mutton or pork hingedly so that adjusting, the one of L shaped plate
It holds as the moving tooth end for being connect with tune gap ratchet assembly, for the other end of L shaped plate as hanging hole end, hanging hole end is located at moving tooth end
Top；Adjusting gap bracing wire assembly includes the pull ring end, drag hook end and bracing wire for being located at both ends, and pull ring end fixing sleeve is supported in hoof
On pin, drag hook end is connected to the upper through-hole for adjusting gap shift plate hanging hole end, and bracing wire connects around the guide groove of bracing wire guide holder outer side edges
Between pull ring end and drag hook end, so that pull ring end and drag hook end are moved synchronously along bracing wire；Adjust one end hook of gap shift plate return spring
It is connected to the lower through-hole for adjusting gap shift plate hanging hole end, the other end is connected to the lower part of the postposition tendons of beef, mutton or pork.
The tune gap ratchet assembly includes hoof lower end return spring, adjusts gap swivel nut, adjusts gap ratchet and axle sleeve, and hoof lower end is returned
Position both ends of the spring difference clasp joint on the preposition tendons of beef, mutton or pork and the postposition tendons of beef, mutton or pork, axle sleeve and adjust gap swivel nut be connected respectively to the preposition tendons of beef, mutton or pork, after
The lower part of the tendons of beef, mutton or pork is set, adjusting gap ratchet includes the gear being located in the middle with moving tooth and the long axis for being coaxially fixed in gear both ends
And short axle, it adjusts gap swivel nut to be socketed in by screw thread and adjusts on gap ratchet long axis, axle sleeve, which is socketed in, to be adjusted in gap ratchet short axle, gear and institute
The moving tooth end connection for adjusting gap shift plate is stated, is adjusted and is stirred moving tooth under the effect of gap shift plate and rotated with moving gear, so that adjusting gap ratchet and tune
Gap swivel nut in axial direction generates movement.
When the piston mandril of the wheel cylinder is applied to the preposition tendons of beef, mutton or pork, side is mobile forward for the preposition tendons of beef, mutton or pork, drives and adjusts gap
Side is mobile forward for bracing wire in bracing wire assembly, and it is small size to front side to lower gap shift plate hanging hole end in the pulling force for adjusting gap bracing wire assembly mobile
The moving tooth separation on gap shift plate moving tooth end and the tune gap ratchet assembly is adjusted in rotation；When the piston mandril of wheel cylinder is not made
When using the preposition tendons of beef, mutton or pork (when i.e. the mobile pulling force of tune gap bracing wire assembly cancels), under the action of adjusting gap shift plate return spring, adjust
Sidespin goes back to position backward at gap shift plate hanging hole end, and gap shift plate moving tooth end is adjusted to stir the moving tooth rotation adjusted on gap ratchet assembly.
The axle sleeve adjusts gap swivel nut to be equipped with open slot between the preposition tendons of beef, mutton or pork, postposition tendons of beef, mutton or pork connecting end surface respectively, preposition
The tendons of beef, mutton or pork are embedded into the open slot of axle sleeve, and the postposition tendons of beef, mutton or pork are embedded into the open slot for adjusting gap swivel nut.
When the moving tooth rotation adjusted on gap ratchet assembly is stirred downwards at the tune gap shift plate moving tooth end, adjusts gap swivel nut and adjust gap
The movement of axial separation is generated between the long axis of ratchet by screw thread.
The working method of clearance self-regulating of the present invention is:
After inputting oil pressure in the wheel cylinder of the wheel cylinder assembly, the braking tendons of beef, mutton or pork of wheel cylinder assembly and preposition hoof assembly
The piston mandril being in contact pushes preposition hoof assembly to drive tune gap ratchet assembly and postposition hoof assembly to move along brake drum, so that
Friction plate and brake drum contact are braked, while being adjusted gap bracing wire assembly to haul and being adjusted the movement of gap shift plate, so that adjusting gap shift plate and tune
Moving tooth on gap ratchet assembly mutually separates.
When the wheel cylinder assembly pressure release, preposition hoof assembly adjusts gap ratchet assembly and postposition hoof assembly respectively respective
Return spring under the action of return, adjust gap shift plate return under the action of adjusting gap shift plate return spring, adjust gap shift plate moving tooth electric
Pressure table, which is stirred downwards, adjusts gap ratchet gear to make rotating motion, and the tune gap ratchet and tune gap swivel nut in axial direction separate, to
Compensate the abrasion loss between brake drum and friction plate.
If after the forward and backward friction disc wear for setting hoof assembly, existing gap X increases between brake drum and friction plate.Gap X
It when increasing smaller, adjusts gap shift plate and adjusts the moving tooth phase separating distance on gap ratchet assembly little, so that adjusting the moving tooth end of gap shift plate
The tooth pitch of a moving tooth is not separated with the moving tooth of original position, then still toggles it to original position when adjusting gap shift plate return
Moving tooth adjusts the gear position on gap ratchet assembly to remain unchanged.
It when gap X increases larger, adjusts gap shift plate and adjusts the moving tooth phase separating distance on gap ratchet assembly larger, so that adjusting gap
The moving tooth end of shift plate and the moving tooth separating distance of original position are not less than the tooth pitch of a moving tooth, then not when adjusting gap shift plate return
The moving tooth of original position can be toggled it to, but toggles it to a moving tooth of original position, so that adjusting the gear on gap ratchet assembly
It is rotated, adjust gap swivel nut and axial distance between gap ratchet is adjusted to increase, therefore increase forward and backward set between hoof assembly lower end
Spacing, the abrasion loss between brake drum and friction plate is compensated with this, realizes the self-regulated in gap.
Beneficial effects of the present invention:
The present invention realizes the timely adjusting of drum-shoe clearance, compensates for manual lash and adjusts bring adjusting difficulty, adjusts
The defect that the bad control of amplitude, regulating cycle can not determine.
The present invention realizes the accurate adjusting of drum-shoe clearance, and adjusting the number of gear teeth for adjusting gap ratchet in gap ratchet assembly to be can be with
Change, it, can be accurate by calculating and testing according to the requirement in gap specific in automobile use process and the structure of brake
Determine number of gear teeth, when drum-shoe clearance exceeds claimed range, shift plate can handsetting gear rotation, and then reach accurate maintenance
The purpose of drum-shoe clearance.
The present invention manually adjusts gap relative to current, can accurately adjust drum-shoe clearance in real time, and eliminate whole
Che Shangyong tool adjusts the inconvenience and inaccuracy of gap adjusting mechanism adjustment drum-shoe clearance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is schematic three dimensional views of the invention.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the schematic three dimensional views of back-plate assembly.
Fig. 5 is the schematic three dimensional views of gap adjusting mechanism assembly.
Fig. 6 is the schematic three dimensional views of preposition hoof assembly and postposition hoof assembly.
Fig. 7 is the partial sectional view in the direction B-B of Fig. 1.
Fig. 8 is the working principle diagram of self-boosting type drum brake of the present invention equipped with band gap self-adjusting mechanism device.
In figure: 1 postposition hoof assembly, 2 brake-shoe baffles, return spring in 3 postpositions, 4 brake drums, 5 back-plate assemblies, 6
Tune gap shift plate return spring, 7 hoof lower end return springs, 8 tune gap ratchet assemblies, 9 tune gap swivel nuts, 10 tune gap ratchets, 11 axle sleeves, 12
Tune gap shift plate, 13 bracing wire guide holders, 14 wheel cylinder assemblies, 15 tune gap bracing wire assemblies, 16 preposition hoof assemblies, 17 hoof supporting pins,
18 pressure spring pull rods, 19 press spring bases, 20 pressure springs, the 21 preposition tendons of beef, mutton or pork, the 22 postposition tendons of beef, mutton or pork, 23 preposition Brake shoe linings, 24 postposition systems
Dynamic shoe friction plate, 25 preposition upper return springs, 26 piston mandrils, 27 moving teeth.
Specific embodiment
The invention will be further described with specific implementation with reference to the accompanying drawing.
As depicted in figs. 1 and 2, brake of the invention include back-plate assembly 5, brake drum 4, preposition hoof assembly 16,
Postposition hoof assembly 1, brake-shoe baffle 2 and wheel cylinder assembly 14 further include clearance self-regulating mechanism device, back-plate assembly 5
It is mounted on vehicle frame, wheel cylinder assembly 14 is fixedly mounted on the middle part of 5 end face of back-plate assembly, wheel cylinder assembly 14
Output rod is connected at the fluting of preposition 16 inside edge of hoof assembly, and preposition hoof assembly 16 and postposition hoof assembly 1 are by identical
Pressure spring mechanism be mounted on the two sides of 5 end face of back-plate assembly, clearance self-regulating mechanism device is mounted on preposition 16 He of hoof assembly
It is connect on postposition hoof assembly 1 and with the hoof supporting pin 17 on back-plate assembly 5, preposition hoof assembly 16 and postposition hoof assembly 1
Upper end is all connected to the hoof supporting pin 17 on back-plate assembly 5, as shown in figure 4, hoof supporting pin 17 is positioned at total to back-plate
At the top of 5 end faces, brake-shoe baffle 2 is mounted in hoof supporting pin 17, between 1 lower end of preposition hoof assembly 16 and postposition hoof assembly
It is connected by clearance self-regulating mechanism device whole to carry out clearance self-regulating.
As shown in fig. 6, preposition hoof assembly 16 includes the preposition tendons of beef, mutton or pork 21, preposition Brake shoe lining 23, preposition upper return bullet
Spring 25 and being mounted on plays the preposition shoe plate of support connection function between the preposition tendons of beef, mutton or pork 21 and preposition Brake shoe lining 23, preposition
One end of upper return spring 25 is connected on the preposition tendons of beef, mutton or pork 21, other end clasp joint to hoof supporting pin 17；After postposition hoof assembly 1 includes
It sets the tendons of beef, mutton or pork 22, postposition Brake shoe lining 24, return spring 3 and be mounted on the postposition tendons of beef, mutton or pork 22 and postposition brake-shoe rubs in postposition
The postposition shoe plate of support connection function is played between pad 24, one end of return spring 3 is connected on the postposition tendons of beef, mutton or pork 22 in postposition, separately
One end clasp joint is to hoof supporting pin 17.The middle part of the preposition tendons of beef, mutton or pork 21 and the postposition tendons of beef, mutton or pork 22 passes through pressure spring mechanism and is connected to back-plate
The upper end of assembly 5, the preposition tendons of beef, mutton or pork 21 and the postposition tendons of beef, mutton or pork 22 abuts against on the multi-diameter shaft of hoof supporting pin 17, and the preposition tendons of beef, mutton or pork 21 are with after
It sets and is connected between the lower end of the tendons of beef, mutton or pork 22 by the tune gap ratchet assembly 8 in clearance self-regulating mechanism device.
As shown in Figure 1, wheel cylinder assembly 14 includes wheel cylinder and piston mandril 26, wheel cylinder is bolted
On 5 end face of back-plate assembly, 26 apical grafting of piston mandril of wheel cylinder is in 21 inside of the preposition tendons of beef, mutton or pork of preposition hoof assembly 16
At the fluting at edge.
Brake-shoe baffle 2 and tune gap bracing wire assembly 15 are mounted on the step of hoof supporting pin 17 through preposition upper return spring
25 and postposition on return spring 3 be fixed in hoof supporting pin.
As shown in figure 3, pressure spring mechanism includes pressure spring pull rod 18, press spring base 19 and pressure spring 20, the connection of 18 one end of pressure spring pull rod
In back-plate assembly 5, the other end passes through the preposition tendons of beef, mutton or pork 21 or the postposition tendons of beef, mutton or pork 22 and press spring base 19 connects, and press spring base 19 is with before
Set suit pressure spring 20 on the pressure spring pull rod 18 between the tendons of beef, mutton or pork 21 or the postposition tendons of beef, mutton or pork 22.
As depicted in figs. 1 and 2, clearance self-regulating mechanism device includes adjusting gap ratchet assembly 8, adjusting gap bracing wire assembly 15, bracing wire
Guide holder 13 adjusts gap shift plate 12 and adjusts gap shift plate return spring 6, as shown in fig. 7, bracing wire guide holder 13 is hingedly pacified by sleeve pin
On the pin hole at 21 middle part of the preposition tendons of beef, mutton or pork of preposition hoof assembly 16, preposition upper 25 one end end of return spring is axially passed through
Sleeve pin forms clasp joint.Tune gap shift plate 12 is approximation L shape plate, and the middle part of L shaped plate is linked up under the preposition tendons of beef, mutton or pork 21 by gib head
Portion so that adjust formed between gap shift plate 12 and the preposition tendons of beef, mutton or pork 21 it is hinged, one end of L shaped plate be used as with adjust gap ratchet assembly 8
The moving tooth end of connection, as hanging hole end, hanging hole end is located above moving tooth end the other end of L shaped plate, and hanging hole end is equipped with position respectively
In two upper and lower through-holes.Gap bracing wire assembly 15 is adjusted to include the pull ring end for being located at both ends, drag hook end and be connected to pull ring
Bracing wire between end and drag hook end, pull ring end fixing sleeve are located at preposition hoof assembly 16, postposition hoof assembly in hoof supporting pin 17
Between 1 and brake-shoe baffle 2, drag hook end is connected to the upper through-hole for adjusting 12 hanging hole end of gap shift plate, and bracing wire bypasses bracing wire guide holder 13
The guide groove of outer side edges is connected between pull ring end and drag hook end, so that pull ring end and drag hook end are moved synchronously along bracing wire；Adjust gap
For 6 one end clasp joint of shift plate return spring to the lower through-hole for adjusting 12 hanging hole end of gap shift plate, the other end is connected to the lower part of the postposition tendons of beef, mutton or pork 22.
As shown in figure 5, gap ratchet assembly 8 is adjusted to include hoof lower end return spring 7, adjust gap swivel nut 9, adjust gap ratchet 10 and axle sleeve
11, clasp joint is distinguished on the preposition tendons of beef, mutton or pork 21 and the postposition tendons of beef, mutton or pork 22 in return spring 7 both ends in hoof lower end, and axle sleeve 11 and tune gap swivel nut 9 divide
Be not connected to the lower part of the preposition tendons of beef, mutton or pork 21, the postposition tendons of beef, mutton or pork 22, axle sleeve 11, adjust gap swivel nut 9 respectively with the preposition tendons of beef, mutton or pork 21, postposition hoof
Open slot is equipped between 22 connecting end surface of muscle, the preposition tendons of beef, mutton or pork 21 are embedded into the open slot of axle sleeve 11, and the postposition tendons of beef, mutton or pork 22 are embedded into
In the open slot for adjusting gap swivel nut 9.
As shown in figure 5, adjusting gap ratchet 10 including being located in the middle the gear with moving tooth 27 and being coaxially fixed in gear
The long axis and short axle at both ends are adjusted gap swivel nut 9 to be socketed in by screw thread and are adjusted on 10 long axis of gap ratchet, adjust between gap swivel nut 9 and long axis
It is formed and is threadedly coupled, axle sleeve 11, which is socketed in, to be adjusted in 10 short axle of gap ratchet, forms hinged, the end of axle sleeve 11 between axle sleeve 11 and short axle
Face and the end face contact for adjusting 10 gear of gap ratchet, gear are connect with the moving tooth end for adjusting gap shift plate 12, and gap shift plate 12 is adjusted to act on
Under stir moving tooth 27 and rotated with moving gear so that adjusting gap ratchet 10 and gap swivel nut 9 being adjusted in axial direction to generate movement.Gap is adjusted to dial
When the rotation of moving tooth 27 adjusted on gap ratchet assembly 8 is stirred downwards at 12 moving tooth end of plate, adjusts gap swivel nut 9 and adjust the long axis of gap ratchet 10
Between by screw thread generate axial separation movement.
As shown in Fig. 2, the structure of brake of the present invention is to be linked and packed in the following order: wheel cylinder assembly 14 it is defeated
Rod is connected at the fluting of preposition 16 inside edge of hoof assembly, and preposition hoof assembly 16 and 1 upper end of postposition hoof assembly are all connected to
Hoof supporting pin 17 on back-plate assembly 5 adjusts the axle sleeve 11 of gap ratchet assembly 8 and gap swivel nut 9 is adjusted to be attached separately to the braking tendons of beef, mutton or pork
21, in 22 card slot, preposition hoof assembly 16 and postposition hoof assembly 1 are by by pressure spring pull rod 18, press spring base 19 and pressure spring 20 etc.
Component is fixed on the two sides of 5 end face of floor pan assembly, and bracing wire guide holder 13 is hingedly mounted on preposition hoof assembly 16 by sleeve pin
On the pin hole at preposition 21 middle part of the tendons of beef, mutton or pork, adjusting gap shift plate 12 is approximate L shaped plate, and the middle part of L shaped plate is linked up with by gib head in preposition hoof
The lower part of muscle 21 adjusts 15 pull ring end fixing sleeve of gap bracing wire assembly in hoof supporting pin 17, and drag hook end, which is connected to, adjusts gap shift plate 12 to hang
The upper through-hole of nose end, brake-shoe baffle 2 are mounted in hoof supporting pin 17, and one end of return spring 3 is connected to postposition hoof in postposition
On muscle 22, other end clasp joint to hoof supporting pin 17, preposition upper 25 one end end of return spring is axially formed across sleeve pin
Clasp joint, other end clasp joint to hoof supporting pin 17 adjust 6 one end clasp joint of gap shift plate return spring to the lower logical of tune 12 hanging hole end of gap shift plate
Hole, the other end are connected to the lower part of the postposition tendons of beef, mutton or pork 22；When not applying braking, the braking tendons of beef, mutton or pork 21,22 upper ends and hoof supporting pin 17
Contact, wheelcylinder piston 26 are contacted with the card slot of 21 inside edge of the tendons of beef, mutton or pork, and the pull ring end of gap bracing wire assembly 15 is adjusted to be pressed on hoof support
On the step of pin 17, bracing wire guide holder 13 is pressed on the braking tendons of beef, mutton or pork 21, and the bracing wire of gap bracing wire assembly 15 is adjusted to be oriented to tightly around in bracing wire
Seat 13 guide groove in, adjust gap ratchet assembly 8 axle sleeve 11 and adjust gap swivel nut 9 under the spring-force driven dual of lower return spring 7 and
It brakes the tendons of beef, mutton or pork 21,22 to compress, adjusts 12 moving tooth side pressure of gap shift plate on the moving tooth for adjusting gap ratchet 10.
Its working principle and process of the invention are as follows:
The simplified self-adjusting mechanism principle such as Fig. 8 of the present invention, supporting pin 17 are fulcrum O, wheel cylinder assembly 14 and piston
Mandril 26 collectively forms piston component a, and gap bracing wire assembly 15 and bracing wire guide holder 13 is adjusted to collectively form part b, and tune gap shift plate 12 is
Part c, tune gap shift plate return spring 6 are part d, and E point is the contact for adjusting gap shift plate 12 with the tune gap ratchet 10 for adjusting gap ratchet assembly 8
Point.
Initial installation (when brakeless) state such as Fig. 8 is shown in solid, and part b is fixed on fixed pivot O, and in piston component
For a in A point contact, part c is fixed in systems, and point articulated in B with part b, and part d is fixed in systems, and cuts with scissors in part c in C point
It connects.
When Braking system, part a does direction as shown and moves outward pushing piece b, and part b is around O point rotation drivening piece c around D point
Rotation, E point follow part c to screw out, and part d is stretched, and state is as shown in Fig. 8 dotted line.
When system decompression (release braking), part d under the effect of spring force, drivening piece c return, point E again with tune
Gap ratchet 10 contacts, and because the clockwise rotation of E point pushes the moving tooth of ratchet to rotate outward ratchet, to increase braking
The outer diameter of hoof achievees the effect that adjust gap.
Specifically in an implementation, if after the forward and backward friction disc wear for setting hoof assembly 16,1, brake drum 4 and front and back friction plate
23, existing gap X increases between 24, when X is increased to a certain extent in gap, realizes the self-regulated in gap in the following ways.
When vehicle braking, the piston mandril 26 of wheel cylinder assembly 14 is displaced outwardly, and pushes preposition hoof assembly 16 outward
Mobile, forward and backward brake shoe assembly 16,1 opens.Since forward and backward brake shoe assembly 16,1 opens, 15 gib head of gap bracing wire assembly is adjusted
End tenses and generates movement by bracing wire part, adjusts gap shift plate 12 under the pulling force for adjusting 15 gib head of gap bracing wire assembly around fixed gib head
The rotation of 21 mounting hole of the tendons of beef, mutton or pork is braked, moving tooth end can leave the gear for adjusting gap ratchet 10, and upper return spring 3,25 and tune gap shift plate are returned
Position spring 6 stretches.
When vehicle, which releases, to be braked, wheelcylinder piston 26, postposition brake shoe assembly 1, adjusts gap to dial at preposition brake shoe assembly 16
The all returns under the action of the return spring of plate 12, at this point, adjusting gap shift plate 12 that can touch again adjusts gap ratchet 10, and with adjusting gap
The returning movement of shift plate 12 will push gear and rotate 1 tooth, adjusts gap swivel nut 9 and 10 screwed apart of gap ratchet is adjusted to axially move,
To open preposition hoof assembly 16 and postposition hoof assembly 1, the abrasion of brake strip 23,24 is compensated, to guarantee brake drum 4
Specific gap is kept with brake strip 23,24, achievees the effect that automatically adjust gap.
It can be seen that the present invention can automatically carry out the adjustment of drum-shoe clearance, drum-shoe clearance can be accurately adjusted in real time,
Without manually adjusting, the inconvenience and inaccuracy of manual adjustment are eliminated.
Examples detailed above is the description of the invention, is not limitation of the invention, and any pair of simple variant of the invention is equal
It belongs to the scope of protection of the present invention.
Claims (5)
1. a kind of self-boosting type drum brake with clearance self-regulating mechanism device, including back-plate assembly (5), brake drum
(4), preposition hoof assembly (16), postposition hoof assembly (1), brake-shoe baffle (2) and wheel cylinder assembly (14), it is characterised in that:
It further include clearance self-regulating mechanism device, back-plate assembly (5) is mounted on vehicle frame, the fixed peace of wheel cylinder assembly (14)
Mounted in the middle part of back-plate assembly (5) end face, preposition hoof assembly (16) and postposition hoof assembly (1) pass through identical pressure spring machine
Structure is mounted on the two sides of back-plate assembly (5) end face, and clearance self-regulating mechanism device is mounted on preposition hoof assembly (16) and postposition
It is connect on hoof assembly (1) and with the hoof supporting pin (17) on back-plate assembly (5), preposition hoof assembly (16) and postposition hoof assembly
(1) upper end is all connected to the hoof supporting pin (17) on back-plate assembly (5), preposition hoof assembly (16) and postposition hoof assembly (1)
It is whole to carry out clearance self-regulating by the connection of clearance self-regulating mechanism device between lower end；
The clearance self-regulating mechanism device includes adjusting gap ratchet assembly (8), adjusting gap bracing wire assembly (15), bracing wire guide holder
(13), gap shift plate (12) are adjusted and adjust gap shift plate return spring (6), bracing wire guide holder (13) is hingedly mounted on preposition by sleeve pin
In the middle part of the preposition tendons of beef, mutton or pork (21) of hoof assembly (16), preposition upper return spring (25) one end end passes axially through sleeve pin and forms hook
It connects, adjusting gap shift plate (12) is approximate L shaped plate, and the middle part of L shaped plate is linked up with by gib head in the lower part of the preposition tendons of beef, mutton or pork (21), so that adjusting
It is formed between gap shift plate (12) and the preposition tendons of beef, mutton or pork (21) hingedly, one end of L shaped plate is used as connecting with gap ratchet assembly (8) are adjusted
Moving tooth end, as hanging hole end, hanging hole end is located above moving tooth end the other end of L shaped plate；
Adjusting gap bracing wire assembly (15) includes the pull ring end, drag hook end and bracing wire for being located at both ends, and pull ring end fixing sleeve is in hoof
In supporting pin (17), drag hook end is connected to the upper through-hole for adjusting gap shift plate (12) hanging hole end, and bracing wire bypasses bracing wire guide holder (13) outside
The guide groove of side is connected between pull ring end and drag hook end, so that pull ring end and drag hook end are moved synchronously along bracing wire；Gap is adjusted to dial
For plate return spring (6) one end clasp joint to the lower through-hole for adjusting gap shift plate (12) hanging hole end, the other end is connected to the postposition tendons of beef, mutton or pork (22)
Lower part；
The tune gap ratchet assembly (8) includes hoof lower end return spring (7), adjusts gap swivel nut (9), adjusts gap ratchet (10) and axle sleeve
(11), clasp joint is distinguished on the preposition tendons of beef, mutton or pork (21) and the postposition tendons of beef, mutton or pork (22) in return spring (7) both ends in hoof lower end, axle sleeve (11) and tune
Gap swivel nut (9) is connected respectively to the lower part of the preposition tendons of beef, mutton or pork (21), the postposition tendons of beef, mutton or pork (22), and adjusting gap ratchet (10) includes being located in the middle
Gear and the coaxial long axis and short axle for being fixed in gear both ends with moving tooth (27), adjust gap swivel nut (9) to pass through screw thread and are socketed
On adjusting gap ratchet (10) long axis, axle sleeve (11), which is socketed in, to be adjusted in gap ratchet (10) short axle, gear and the tune gap shift plate (12)
The connection of moving tooth end, adjust and stir moving tooth (27) under gap shift plate (12) effect and rotated with moving gear so that adjust gap ratchet (10) and
Gap swivel nut (9) are adjusted in axial direction to generate movement；
When the piston mandril (26) of the wheel cylinder is applied to the preposition tendons of beef, mutton or pork (21), side is mobile forward for the preposition tendons of beef, mutton or pork (21),
The bracing wire side movement forward adjusted in gap bracing wire assembly (15) is driven, lowers gap shift plate in the pulling force for adjusting gap bracing wire assembly (15) mobile
(12) hanging hole end is slightly rotated to front side, adjusts the moving tooth on gap shift plate (12) moving tooth end and the tune gap ratchet assembly (8)
(27) it separates；When the piston mandril (26) of wheel cylinder is not applied to the preposition tendons of beef, mutton or pork (21), gap shift plate return spring (6) are being adjusted
Under the action of, adjusting gap shift plate (12) hanging hole end, sidespin goes back to position backward, adjusts gap shift plate (12) moving tooth end to stir and adjusts gap ratchet assembly
(8) moving tooth (27) rotation on.
2. a kind of self-boosting type drum brake with clearance self-regulating mechanism device according to claim 1, feature
Be: the preposition hoof assembly (16) includes the preposition tendons of beef, mutton or pork (21), preposition Brake shoe lining (23), preposition upper return spring
(25) and be mounted on risen between the preposition tendons of beef, mutton or pork (21) and preposition Brake shoe lining (23) support connection function preposition shoe plate,
One end of preposition upper return spring (25) is connected on the preposition tendons of beef, mutton or pork (21), other end clasp joint to hoof supporting pin (17)；
The postposition hoof assembly (1) includes the postposition tendons of beef, mutton or pork (22), postposition Brake shoe lining (24), return spring in postposition
(3) and be mounted on risen between the postposition tendons of beef, mutton or pork (22) and postposition Brake shoe lining (24) support connection function postposition shoe plate,
One end of return spring (3) is connected on the postposition tendons of beef, mutton or pork (22) in postposition, other end clasp joint to hoof supporting pin (17)；
The wheel cylinder assembly (14) includes wheel cylinder and piston mandril (26), and wheel cylinder is bolted on system
On dynamic floor pan assembly (5) end face, the preposition tendons of beef, mutton or pork (21) of piston mandril (26) apical grafting of wheel cylinder in preposition hoof assembly (16)
At the fluting of inside edge；
The middle part of the preposition tendons of beef, mutton or pork (21) and the postposition tendons of beef, mutton or pork (22) passes through pressure spring mechanism and is connected to back-plate assembly (5), preposition
The upper end of the tendons of beef, mutton or pork (21) and the postposition tendons of beef, mutton or pork (22) abuts against on the multi-diameter shaft of hoof supporting pin (17), the preposition tendons of beef, mutton or pork (21) and postposition
Pass through tune gap ratchet assembly (8) connection in clearance self-regulating mechanism device between the lower end of the tendons of beef, mutton or pork (22).
3. a kind of self-boosting type drum brake with clearance self-regulating mechanism device according to claim 2, feature
Be: the pressure spring mechanism includes pressure spring pull rod (18), press spring base (19) and pressure spring (20), the connection of pressure spring pull rod (18) one end
In back-plate assembly (5), the other end passes through the preposition tendons of beef, mutton or pork (21) or the postposition tendons of beef, mutton or pork (22) and press spring base (19) connection, pressure spring
Pressure spring (20) are set on pressure spring pull rod (18) between seat (19) and the preposition tendons of beef, mutton or pork (21) or the postposition tendons of beef, mutton or pork (22).
4. a kind of self-boosting type drum brake with clearance self-regulating mechanism device according to claim 1, feature
Be: the axle sleeve (11) adjusts gap swivel nut (9) to set between the preposition tendons of beef, mutton or pork (21), the postposition tendons of beef, mutton or pork (22) connecting end surface respectively
There is open slot, the preposition tendons of beef, mutton or pork (21) are embedded into the open slot of axle sleeve (11), and the postposition tendons of beef, mutton or pork (22), which are embedded into, adjusts gap swivel nut (9)
In open slot.
5. a kind of self-boosting type drum brake with clearance self-regulating mechanism device according to claim 1, feature
It is: when moving tooth (27) rotation adjusted on gap ratchet assembly (8) is stirred downwards at described tune gap shift plate (12) the moving tooth end, adjusts gap spiral shell
Cover the movement for generating axial separation between (9) and the long axis for adjusting gap ratchet (10) by screw thread.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611140418.8A CN106523549B (en) | 2016-12-12 | 2016-12-12 | Self-boosting type drum brake with clearance self-regulating mechanism device |
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| CN201611140418.8A CN106523549B (en) | 2016-12-12 | 2016-12-12 | Self-boosting type drum brake with clearance self-regulating mechanism device |
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| CN106523549B true CN106523549B (en) | 2019-07-02 |
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| CN110360246B (en) * | 2019-07-22 | 2020-11-27 | 扬州市汉讯科技有限公司 | Drum brake with long service life and good safety performance |
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