CN114576289B - Traveling and parking integrated brake - Google Patents
Traveling and parking integrated brake Download PDFInfo
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- CN114576289B CN114576289B CN202210106696.0A CN202210106696A CN114576289B CN 114576289 B CN114576289 B CN 114576289B CN 202210106696 A CN202210106696 A CN 202210106696A CN 114576289 B CN114576289 B CN 114576289B
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- 238000007789 sealing Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
- F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
- F16D55/36—Brakes with a plurality of rotating discs all lying side by side
- F16D55/40—Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or one the brake
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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
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. 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
- F16D65/14—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
- F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
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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
- 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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- 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
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/08—Seals, e.g. piston seals
Abstract
The invention discloses a traveling and parking integrated brake, which comprises a spline housing, a friction pair, a housing, a traveling brake piston, a parking brake piston, an oil cylinder, a large disc spring and a large clamp spring, wherein through holes are uniformly distributed in the parking brake piston; the automatic compensation device can realize the integration of service braking and parking braking, realizes the function of automatically compensating the piston stroke after the friction plate is worn, and solves the problem that the braking time of a common brake is prolonged or the brake cannot be braked due to the friction plate wear.
Description
Technical Field
The invention relates to a traveling and parking integrated brake, and belongs to the technical field of vehicle braking.
Background
Currently, brakes are used on vehicles mainly as dry brakes, such as drum brakes, disc brakes, multi-disc dry brakes, and the like. But now, as the vehicle speed is faster and faster, the vehicle weight is also larger and heavier. During driving, the temperature of the friction plate can rise too fast, which makes the friction plate difficult to separate. Conventional dry brakes have not been suitable for high speed heavy-duty vehicles. Meanwhile, engineering vehicles are increasingly widely used in mines and other severe environmental engineering. Under such conditions, the demands on the brake performance are becoming more stringent. Wet brakes are therefore becoming more and more widely used, mainly in relatively severe operating conditions and heavy duty vehicles. However, most of the conventional wet brakes only use service braking, do not have a parking device, require an additional parking device, and have a reduced braking performance due to abrasion of the friction plate, so that the friction plate needs to be replaced.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a traveling and parking integrated brake, which solves the problems that in the prior art, the brake has only a traveling braking function and no parking braking function, and the abrasion braking performance of a friction plate is reduced and the friction plate needs to be replaced frequently.
In order to achieve the above object, the present invention adopts the following technical scheme:
a traveling and parking integrated brake comprises a friction pair, a traveling brake piston (11), a parking brake piston (16), an oil cylinder (17) and an automatic compensation device; the automatic compensation device is used for providing a stroke braking compensation amount after the friction plate is worn, and the stroke braking compensation amount is used for compensating the stroke of the stroke braking piston which is increased after the friction plate is worn, so that the braking moment and the response time of the brake are maintained stable; the automatic compensation device is also used for pushing the parking brake piston through brake fluid of the oil cylinder when the brake of the drive axle fails, and the parking brake piston forcedly separates the service brake piston from the friction pair so as to release the brake;
further, a parking oil cavity is formed in the right side of the oil cylinder, a driving oil cavity is formed in the left side of the oil cylinder, grooves are uniformly distributed on the leftmost side of the outer part of the oil cylinder, bosses for communicating the driving oil cavity and the parking oil cavity are arranged between the driving oil cavity and the parking oil cavity, through holes are uniformly distributed on the parking brake piston, threaded holes corresponding to the through holes are uniformly distributed on the bosses, and clamp spring grooves are formed in the end parts of the parking oil cavity;
the right side of the oil cylinder is sequentially provided with a parking brake piston, a large disc spring and a large clamp spring, the large clamp spring is arranged in a clamp spring groove, the parking brake piston is arranged in a parking oil cavity, and two ends of the large disc spring are respectively attached to the parking brake piston and the large clamp spring;
the left side of the oil cylinder is sequentially provided with a service brake piston, a friction pair, a spline housing and a shell, the service brake piston is arranged in a service oil cavity, the friction pair comprises a driving friction plate and a driven friction plate which are arranged in a staggered manner, the inner teeth of the driving friction plate are meshed with the outer teeth of the spline housing, anti-rotation bosses are uniformly distributed on the periphery of the driven friction plate and assembled in the groove, and the shell is fixedly connected with the left side of the oil cylinder;
further, the automatic compensation device comprises a step sleeve, a screw, a small disc spring and a cotter pin, wherein the screw sequentially penetrates through the small disc spring, the step sleeve, the through hole and the gasket and then is fixedly connected with the threaded hole, the small end of the step sleeve stretches into the through hole, the cotter pin is arranged in the through hole, the left side of the cotter pin is attached to the right end face of the step end of the step sleeve, and the two ends of the small disc spring are attached to the end face of the screw and the left end face of the step end of the step sleeve respectively.
Further, the side surface of the oil cylinder is provided with a square boss, the square boss is provided with a first oil passage hole and a second oil passage hole, the first oil passage hole is communicated with the driving oil cavity, and the second oil passage hole is communicated with the parking oil cavity.
Further, two circular bosses are arranged on the periphery of the oil cylinder, the two circular bosses are arranged oppositely, stepped holes with threads are formed in the circular bosses, the stepped holes are communicated with the parking oil cavity, the stepped holes are sequentially provided with a safety plug, a small sealing ring, a stud and a blocking block from outside to inside, and the stud is matched with the internal threads of the stepped holes.
Further, a first groove and a second groove are formed in the periphery of the parking brake piston, a large O-shaped ring retainer ring and a large O-shaped ring are installed in the first groove, a small O-shaped ring retainer ring and a small O-shaped ring retainer ring are installed in the second groove, and the large O-shaped ring retainer ring and the small O-shaped ring retainer ring are arranged on the back pressure side;
further, the outer circle of the service brake piston is provided with a third groove and a fourth groove, a large star-shaped ring retainer ring and a large star-shaped ring are installed in the third groove, a small star-shaped ring retainer ring and a small star-shaped ring retainer ring are installed in the fourth groove, and the large star-shaped ring retainer ring and the small star-shaped ring retainer ring are arranged on the back pressure side.
Further, outer rabbets are arranged on the left side and the right side of the oil cylinder, and mounting sealing rings are arranged in the outer rabbets.
Further, the number of the through holes and the threaded holes is three.
Further, the number of the anti-rotation bosses and the grooves is four.
Further, two snap spring grooves are formed in the spline housing, small snap springs are arranged in the snap spring grooves, and the innermost driving friction plate is arranged between the two small snap springs.
The invention has the beneficial effects that:
1. the brake can realize the integration of service brake and parking brake, and can realize the function of forcedly releasing the parking brake (when the vehicle fails, the friction plate is forcedly separated by the structure on the brake);
2. the automatic compensation device can keep the piston stroke and the braking moment stable, and the response speed of the vehicle to braking will not be obviously weakened;
3. the sealing mode of adding the star-shaped ring into the single star-shaped ring retainer ring and adding the O-shaped ring into the single O-shaped ring retainer ring is adopted, and the retainer rings are all arranged on the back pressure side, so that the whole layout is more compact while the sealing effect is good under the condition of ensuring the existence of pressure;
4. the anti-rotation boss on the driven friction plate is assembled in the groove of the oil cylinder, so that the friction plate is guaranteed to only move left and right in the working process, the rotation of the friction plate is limited, the abnormal abrasion of the friction plate caused by the rotation of the friction plate is improved, and the service life of the friction plate is prolonged.
Drawings
FIG. 1 is a first schematic illustration of a brake construction according to the present invention;
FIG. 2 is a second schematic illustration of the brake configuration of the present invention;
FIG. 3 is a schematic diagram of the oil cylinder structure of the present invention;
FIG. 4 is a cross-sectional view E-E of FIG. 3 in accordance with the present invention;
FIG. 5 is a cross-sectional view B-B of FIG. 4 in accordance with the present invention;
FIG. 6 is a cross-sectional view of F-F of FIG. 4 in accordance with the present invention;
FIG. 7 is a schematic illustration of a parking brake piston configuration in accordance with the present invention;
FIG. 8 is a cross-sectional view of FIG. 7C-C in accordance with the present invention;
FIG. 9 is a schematic illustration of a service brake piston configuration of the present invention;
FIG. 10 is a cross-sectional view A-A of FIG. 9 in accordance with the present invention;
FIG. 11 is a schematic view of the driven friction plate structure of the present invention.
Meaning of reference numerals in the drawings: 1-a large sealing ring; 2-step sleeve; 3-screws; 4-small disc springs; 5-cotter pins; 6-spline housing; 7-small clamp springs; 8-an active friction plate; 9-a driven friction plate; 10-a housing; 11-service brake piston; 12-a large star-shaped retainer ring; 13-large star-shaped rings; 14-small star-shaped rings; 15-small star-shaped ring retainer rings; 16-a parking brake piston; 17-an oil cylinder; 18-large O-shaped ring retainer rings; 19-large O-ring; 20-a large disc spring; 21-large clamp springs; 22-small O-rings; 23-small O-shaped ring retainer rings; 24-a gasket; 25-outer spigot; 27-small sealing rings; 28-blocking; 29-studs; 30-safety blocking; 31-a first oil passage hole; 32-a second oil passage hole; 33-parking oil chamber; 34-boss; 35-a clamp spring groove; 36-driving oil cavity; 37-slot; 38-a stepped bore; 39-threaded holes; 40-a first trench; 41-through holes; 42-a third trench; 43-anti-rotation boss; 44-a second trench; 45-fourth grooves; 46-circular boss; 47-square boss.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, the embodiment discloses a traveling-parking integrated wet brake with an automatic compensation device, which comprises a large sealing ring 1, a step sleeve 2, a screw 3, a small disc spring 4, a cotter pin 5, a spline sleeve 6, a small clamping spring 7, a driving friction plate 8, a driven friction plate 9, a shell 10, a service brake piston 11, a large star-shaped ring 12, a large star-shaped ring 13, a small star-shaped ring 14, a small star-shaped ring 15, a parking brake piston 16, an oil cylinder 17, a large O-shaped ring 18, a large O-shaped ring 19, a large disc spring 20, a large clamping spring 21, a small O-shaped ring 22, a small O-shaped ring retainer ring 23, a gasket 24, a small sealing ring 27, a blocking block 28, a stud 29 and a safety block 30.
Referring to fig. 4, a driving oil cavity 36 and a parking oil cavity 33 are processed in the oil cylinder 17, a boss 34 is arranged between the driving oil cavity 36 and the parking oil cavity 33, the boss 34 divides the oil cylinder into a left oil cavity and a right oil cavity, the parking oil cavity 33 is arranged on the right side of the boss 34, and the driving oil cavity 36 is arranged on the left side of the boss 34; four evenly distributed grooves 37 are formed on the leftmost side of the outer part of the oil cylinder 17. As shown in fig. 3, two bosses are provided on the side of the cylinder 17, one is a circular boss 46 and one is a square boss 47, and the circular boss 46 and the square boss 47 are distributed at 90 ° on the side of the cylinder 17.
As can be seen from fig. 1 and 2, the parking brake piston 16 and the service brake piston 11 are respectively installed in the parking oil chamber 33 and the service oil chamber 36; the parts which are sequentially arranged on the right side surface of the boss 34 in the oil cylinder are a parking brake piston 16, a large disc spring 20 and a large clamp spring 21, wherein the right end surface of the parking brake piston 16 is attached to the large disc spring 20, the right end surface of the outermost large disc spring 20 is attached to the left end surface of the large clamp spring 21, and the large clamp spring 21 is arranged in a clamp spring groove 35 on the left side of the oil cylinder 17. The parts arranged on the left side surface of the boss 34 inside the oil cylinder are a service brake piston 11, a driving friction plate 8, a driven friction plate 9, a spline housing 6 and a shell 10, and the right side end surface of the service brake piston 11 is attached to the left side end surface of the boss 34 inside the oil cylinder; a friction plate is arranged at the left side of a driving brake piston 11, and a plurality of driving friction plates 8 and a plurality of driven friction plates 9 are arranged in a staggered manner to form a friction pair; the driving friction plate 8 is provided with internal teeth, teeth are arranged inside and outside the spline housing 6, and the internal teeth of the driving friction plate 8 are meshed with the external teeth of the spline housing 6; two jump ring grooves are formed in the spline housing 6, small jump springs 7 are arranged in the two jump ring grooves, and a first driving friction plate 8 (the innermost side) is arranged between the two small jump springs 7; as shown in fig. 11, the driven friction plate 9 has four anti-rotation bosses 43 on the periphery thereof, and the four anti-rotation bosses 43 of the driven friction plate 9 are fitted in the four grooves 37 on the leftmost side of the outside of the cylinder.
As shown in fig. 9 and 10, the service brake piston 11 is provided with three uniformly distributed through holes 41, and the inner step surface of the oil cylinder shown in fig. 6 is provided with three threaded holes 39 corresponding to the three holes; the three through holes 41 shown in fig. 1 are respectively provided with a cotter pin 5 and a ladder sleeve 2, the cross section of the ladder sleeve 2 is T-shaped, a penetrating inner hole is formed in the middle of the ladder sleeve 2, the left side of the ladder sleeve is a step end, the right side of the ladder sleeve is a small end, the outer diameter of the step end is larger than that of the small end, the left side of the cotter pin 5 is attached to the right end face of the step end of the ladder sleeve 2, the small end of the ladder sleeve 2 stretches into the through hole 41, a group of small disc springs 4 are arranged on the left side of the step end of the ladder sleeve 2, the left end face of the step end of the ladder sleeve 2 is attached to the small disc springs 4, the rightmost small disc springs 4 are attached to the end face of the screw 3, and a gasket 24 is arranged at the joint of the screw 3 and the threaded hole 39, and the specific connection process is as follows: the screw 3 sequentially passes through the inner hole of the small disc spring 4, the inner hole of the step sleeve 2, the through hole 41 on the service brake piston 11 and the inner hole of the gasket 24, is connected with the threaded hole 39 on the boss 34 inside the oil cylinder through the end threads, and simultaneously connects all the parts in series.
As shown in fig. 3 and 4, a square boss 47 on the side of the cylinder 17 is provided with first oil passage holes 31 and second oil passage holes 32, wherein two of the first oil passage holes 31 pass through the oil chamber 36 and two of the second oil passage holes 32 pass through the parking oil chamber 33. A threaded stepped hole 38 is formed in a circular boss 46 on the periphery of the oil cylinder 17 and is communicated with the parking oil chamber 33, and the stepped hole 38 is internally and sequentially provided with: safety plug 30, small seal 27, stud 29 and plug 28. Referring to fig. 7 and 8, a first groove 40 and a second groove 44 are formed in the periphery of the parking brake piston 16, and as can be seen from fig. 1, a large O-ring retainer 18 and a large O-ring 19 are respectively installed in the first groove, and a small O-ring 22 and a small O-ring retainer 23 are respectively installed in the second groove 44, wherein the large O-ring retainer 18 and the small O-ring retainer 23 are on the back pressure side; referring to fig. 9 and 10, a third groove 42 and a fourth groove 45 are machined on the outer circle of the driving brake piston 11, a large star-shaped ring retainer 12 and a large star-shaped ring 13 are installed in the third groove 42, and a small star-shaped ring 14 and a small star-shaped ring retainer 15 are installed in the fourth groove 45, wherein the large star-shaped ring retainer 12 and the small star-shaped ring retainer 15 are on the back pressure side; the sealing rings 1 are arranged in the mounting grooves of the outer rabbets 25 on the left side and the right side of the oil cylinder. The oil cylinder is connected with the shell through bolts.
The principle of the invention is as follows:
1. a running and parking integrated wet brake with an automatic compensation device is arranged on a wheel type vehicle drive axle, the brake can bear the normal running braking and parking braking under the action of a hydraulic system, a compensation mechanism is arranged in the brake, the braking moment and the response time of the brake can be kept stable after friction plates are worn, and when the brake of the drive axle fails, the brake can be forcedly released, so that the vehicle can run. The original installation state of the multifunctional brake is a parking brake state, and the loading mode for releasing the parking brake is as follows: the brake fluid pushes the parking brake piston 16 through the parking brake oil cavity 32, the large disc spring 20 is compressed through the rightward movement of the parking brake piston 16, after the parking brake piston 16 moves rightward, the parking brake piston 16 is separated from the service brake piston 11, and the small disc spring 4 pushes the step sleeve 2, pushes the cotter pin 5 and pushes the service brake piston 11 to move rightward due to the elastic force, so that the service brake piston 11 is separated from the friction pair, and the parking brake is released. The mode of service braking is as follows: the brake fluid pushes the service brake piston 11 through the service brake oil cavity 31, the friction pair is directly compressed through the service brake piston 11, and the purpose of deceleration or stopping is achieved through friction of the friction pair. The implementation mode of the parking brake is as follows: the parking brake piston 16 is pushed by the process of releasing the compression force of the disc spring 20, the service brake piston 11 is pushed, the service brake piston 11 compresses the friction pair, and the purpose of parking brake is achieved through friction of the friction pair.
2. The working principle of the compensation mechanism is described below: for convenience of description, the friction force between the cotter pin 5 and the service brake piston 11 is referred to as F1, the elastic force of the small disc spring 4 is referred to as F2, and the pressure F3 of the brake fluid pushing the service brake piston 11 during service braking is as follows: f3 > F1 > F2. At the initial stage of the brake operation (when the friction plate is not worn), the stroke L of the service brake piston 11 is a fixed value. The value is equal to the compression amount f of the disc spring 4 in the initial state (at the time of parking braking), i.e., l=f. The cotter pin 5 and the service brake piston 11 do not move relatively, and can be regarded as a whole. With the progressive wear of the friction pair, during service braking, the stroke L of the service brake piston 11 will gradually increase, and the compression f of the disc spring is unchanged due to the limiting effect of the step sleeve 2, so that the stroke L of the service brake piston 11 will be greater than the stroke of the disc spring at this time, i.e. L > f. Since the force relationship is F3 > F1, when the compression amount of the small disc spring 4 reaches the limit position, the cotter pin 4 will move relatively to the travel brake piston 11 to compensate the travel of the service brake piston 11 after the friction plate is worn, and the distance of the relative movement will be referred to as compensation amount x, where l=f+x.
Since the whole process is a dynamic change process, when the vehicle is running, the small disc spring 4 pushes the service brake piston 11 to return, and at the moment, the cotter pin 5 and the service brake piston 11 do not move relatively due to the fact that F1 is larger than F2, and the compensation amount x of the cotter pin cannot disappear, so that when the vehicle is braked again, the travel L of the service brake piston is equal to the compression amount F of the disc spring, namely L=f. When the friction plate is worn again, the compensation amount x continues to increase, and as the friction plate is worn gradually, the compensation amount x gradually increases, and the piston stroke is always the same as the compression amount of the disc spring and remains unchanged.
3. Two circular bosses 46 are arranged on the periphery of the oil cylinder 17, a stepped hole 38 with threads is processed on the circular bosses 46 and is communicated with the parking oil cavity 33, and the stepped hole 38 is internally and sequentially provided with: safety plug 30, small seal 27, stud 29 and plug 28. The stud 29 is threaded into the hole. When the vehicle brakes normally, the screwing length of the stud 29 is controlled by calculation so as to control the block 28 not to contact the parking brake piston 16. When the vehicle is abnormally braked and the parking brake is required to be forcibly released, the safety plug 30 is required to be removed, and the parking brake piston 16 is forcibly pushed open by screwing the stud 29 deeper to push the plug 28 downwards, so that the process of forcibly releasing the parking brake is completed.
Brief description of the assembly of the invention:
the oil cylinder 17 is internally provided with a driving oil cavity 36 and a parking oil cavity 33, parts which are sequentially arranged in the parking oil cavity on the right side surface of a boss 34 in the oil cylinder are a parking brake piston 16, a large disc spring 20 and a large clamp spring 21, the right end surface of the parking brake piston 16 is attached to a pair of large disc springs 20, the outermost side is blocked by the large clamp spring 21, and the large clamp spring 21 is arranged in a clamp spring groove 35 on the left side of the oil cylinder 17. A service brake piston 11 is arranged in a service oil cavity 36 at the left side of the boss 34 in the oil cylinder, and the right end surface of the service brake piston 11 is attached to the left end surface of the boss 34 in the oil cylinder; a friction pair (a plurality of driving friction plates 8 and a plurality of driven friction plates 9 are staggered) is arranged on the left side of the driving brake piston 11; the internal teeth of the driving friction plate 8 are meshed with the external teeth of the spline housing 6; the four anti-rotation bosses 43 of the driven friction plate 9 are assembled in the four grooves 37 at the leftmost side of the outer part of the oil cylinder; the left side of the friction pair is a shell 10 which is connected with an oil cylinder 17 through bolts. The three through holes 41 of the driving brake piston are respectively provided with an opening pin 5, the left side of the opening pin 5 is jointed with the step surface of a step sleeve 2, the small end of the step sleeve 2 stretches into the through hole 41, the left side of the step sleeve 2 is provided with a group of small disc springs 4, the left end surface of the step sleeve 2 is jointed with the small disc springs 4, the rightmost small disc springs 4 are jointed with the end surfaces of bolts 3, a gasket 24 is arranged at the joint of the bolts 3 and threaded holes 39, and the bolts 3 sequentially pass through the inner holes of the small disc springs 4, the inner holes of the step sleeve 2, the through holes 41 on the driving brake piston 11 and the inner holes of the gasket 24 and are connected with the threaded holes 39 on the boss 34 in the oil cylinder through end threads, and meanwhile the parts are also connected in series. The stepped holes of the two round bosses 46 at the periphery of the oil cylinder 17 are sequentially provided with: safety plug 30, small seal ring 27, stud 29 and plug 28; a first groove 40 and a second groove 44 are formed in the periphery of the parking brake piston 16, a large O-shaped ring retainer 18 and a large O-shaped ring 19 are respectively arranged in the first groove, a small O-shaped ring 22 and a small O-shaped ring retainer 23 are respectively arranged in the second groove 44, wherein the large O-shaped ring retainer 18 and the small O-shaped ring retainer 23 are arranged on the back pressure side; referring to fig. 9 and 10, a third groove 42 and a fourth groove 45 are machined on the outer circle of the driving brake piston 11, a large star-shaped ring retainer 12 and a large star-shaped ring 13 are installed in the third groove 42, and a small star-shaped ring 14 and a small star-shaped ring retainer 15 are installed in the fourth groove 45, wherein the large star-shaped ring retainer 12 and the small star-shaped ring retainer 15 are on the back pressure side; and sealing rings 1 are arranged in sealing ring mounting grooves of outer rabbets on the left side and the right side of the oil cylinder.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (9)
1. The traveling and parking integrated brake is characterized by comprising a friction pair, a traveling brake piston (11), a parking brake piston (16), an oil cylinder (17) and an automatic compensation device; the automatic compensation device is used for providing a stroke braking compensation amount after the friction plate is worn, and the stroke braking compensation amount is used for compensating the stroke of the stroke braking piston which is increased after the friction plate is worn, so that the braking moment and the response time of the brake are maintained stable; the automatic compensation device is also used for pushing the parking brake piston through brake fluid of the oil cylinder when the brake of the drive axle fails, and the parking brake piston forcedly separates the service brake piston from the friction pair so as to release the brake;
the parking oil cavity (33) is formed in the right side of the oil cylinder (17), the driving oil cavity (36) is formed in the left side of the oil cylinder (17), grooves (37) are uniformly formed in the leftmost side of the outer portion of the oil cylinder (17), bosses (34) for communicating the driving oil cavity (36) and the parking oil cavity (33) are formed in the position, communicated with the two oil cavities, through holes (41) are uniformly formed in the driving brake piston (11), threaded holes (39) corresponding to the through holes (41) are uniformly formed in the bosses (34), and clamp spring grooves (35) are formed in the end portion of the parking oil cavity (33);
the right side of the oil cylinder (17) is sequentially provided with a parking brake piston (16), a large disc spring (20) and a large clamp spring (21), the large clamp spring (21) is arranged in a clamp spring groove (35), the parking brake piston (16) is arranged in a parking oil cavity (33), and two ends of the large disc spring (20) are respectively attached to the parking brake piston (16) and the large clamp spring (21);
the left side of the oil cylinder (17) is sequentially provided with a service brake piston (11), a friction pair, a spline sleeve (6) and a shell (10), the service brake piston (11) is arranged in a traveling oil cavity (36), the friction pair comprises a driving friction plate (8) and a driven friction plate (9) which are placed in a staggered mode, the inner teeth of the driving friction plate (8) are meshed with the outer teeth of the spline sleeve (6), anti-rotation bosses (43) are uniformly distributed on the periphery of the driven friction plate (9), the anti-rotation bosses (43) are assembled in grooves (37), and the shell (10) is fixedly connected with the left side of the oil cylinder (17);
the automatic compensation device comprises a step sleeve (2), a screw (3), a small disc spring (4) and a cotter pin (5), wherein the screw (3) sequentially penetrates through the small disc spring (4), the step sleeve (2), a through hole (41) and a gasket (24) and then is fixedly connected with a threaded hole (39), the small end of the step sleeve (2) stretches into the through hole (41), the cotter pin (5) is arranged in the through hole (41), the left side of the cotter pin (5) is attached to the right end face of the step end of the step sleeve (2), and the two ends of the small disc spring (4) are attached to the end face of the screw (3) and the left end face of the step end of the step sleeve (2) respectively.
2. The traveling and parking integrated brake according to claim 1, wherein a square boss (47) is arranged on the side face of the oil cylinder (17), a first oil passage hole (31) and a second oil passage hole (32) are formed in the square boss (47), the first oil passage hole (31) is communicated with the traveling oil cavity (36), and the second oil passage hole (32) is communicated with the parking oil cavity (33).
3. The traveling and parking integrated brake according to claim 1, wherein two circular bosses (46) are arranged on the periphery of the oil cylinder (17), the two circular bosses (46) are oppositely arranged, a threaded stepped hole (38) is formed in the circular boss (46), the stepped hole (38) is communicated with the parking oil cavity (33), a safety plug (30), a small sealing ring (27), a stud (29) and a blocking block (28) are sequentially assembled in the stepped hole (38) from outside to inside, and the stud (29) is matched with the internal threads of the stepped hole (38).
4. A parking and braking integrated brake according to claim 1, characterized in that a first groove (40) and a second groove (44) are arranged on the periphery of the parking brake piston (16), a large O-ring retainer ring (18) and a large O-ring (19) are arranged in the first groove (40), a small O-ring (22) and a small O-ring retainer ring (23) are arranged in the second groove (44), and the large O-ring retainer ring (18) and the small O-ring retainer ring (23) are arranged on the back pressure side.
5. The parking and traveling integrated brake according to claim 1, wherein a third groove (42) and a fourth groove (45) are formed in the outer circle of the service brake piston (11), a large star-shaped ring retainer (12) and a large star-shaped ring (13) are installed in the third groove (42), a small star-shaped ring (14) and a small star-shaped ring retainer (15) are installed in the fourth groove (45), and the large star-shaped ring retainer (12) and the small star-shaped ring retainer (15) are arranged on the back pressure side.
6. The traveling and parking integrated brake according to claim 1, wherein outer spigot (25) is arranged on the left side and the right side of the oil cylinder (17), and an installation sealing ring (1) is arranged in the outer spigot (25).
7. A parking and running integrated brake according to claim 1, characterized in that the number of through holes (41) and threaded holes (39) is three.
8. A parking and running integrated brake according to claim 1, characterized in that the number of anti-rotation bosses (43) and grooves (37) is four.
9. The traveling and parking integrated brake according to claim 1, wherein the spline housing (6) is further provided with two clamp spring grooves, small clamp springs (7) are arranged in the clamp spring grooves, and the innermost driving friction plate (8) is arranged between the two small clamp springs (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210106696.0A CN114576289B (en) | 2022-01-28 | 2022-01-28 | Traveling and parking integrated brake |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210106696.0A CN114576289B (en) | 2022-01-28 | 2022-01-28 | Traveling and parking integrated brake |
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| CN114576289A CN114576289A (en) | 2022-06-03 |
| CN114576289B true CN114576289B (en) | 2023-11-07 |
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| CN202210106696.0A Active CN114576289B (en) | 2022-01-28 | 2022-01-28 | Traveling and parking integrated brake |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114701301A (en) * | 2022-06-08 | 2022-07-05 | 临工集团济南重机有限公司 | Electrically-driven axle and vehicle |
| CN115199680B (en) * | 2022-07-08 | 2024-03-19 | 潍柴动力股份有限公司 | Forced brake release device and method for walking motor |
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| GB2575076B (en) * | 2018-06-28 | 2021-10-20 | Bamford Excavators Ltd | An actuation mechanism for a multi-plate brake |
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| CN114576289A (en) | 2022-06-03 |
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