CN115076263A - Pure hydraulic control moves integrative caliper disc brake of parking - Google Patents
Pure hydraulic control moves integrative caliper disc brake of parking Download PDFInfo
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- CN115076263A CN115076263A CN202210890328.XA CN202210890328A CN115076263A CN 115076263 A CN115076263 A CN 115076263A CN 202210890328 A CN202210890328 A CN 202210890328A CN 115076263 A CN115076263 A CN 115076263A
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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
- F16D65/38—Slack adjusters
- F16D65/72—Slack adjusters hydraulic
- F16D65/74—Slack adjusters hydraulic self-acting in one direction
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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
Abstract
The invention discloses a pure hydraulic control driving and parking integrated caliper disc brake which comprises two caliper bodies which have the same structure and are symmetrically and fixedly connected, wherein a driving cavity and a parking cavity which are mutually independent are arranged in each caliper body; a service braking unit and a parking braking unit are respectively arranged in the service cavity and the parking cavity in a sealing manner, and friction plates are symmetrically arranged on the inner sides of the two caliper bodies; a braking gap is arranged between the service braking unit and the friction plate, and a flexible return mechanism is connected between the parking braking unit and the friction plate; the two clamp bodies are provided with through holes, and long bolts which penetrate through the front and the back and are suitable for being screwed on the vehicle body are arranged in the two through holes. The invention can realize service braking and parking braking, the two types of braking are independent and do not interfere with each other, reliable braking is realized, the whole brake is of a completely symmetrical left-right structure, the variety of parts is reduced, the manufacturing cost is reduced, and the universality is higher.
Description
Technical Field
The invention relates to the technical field of vehicle braking, in particular to a pure hydraulic control parking and driving integrated caliper disc brake.
Background
The caliper disc brake is one kind of disc brake, and its rotating element is metal disc with end surface working, named brake disc, and its fixed element is brake block comprising friction block with small working area and metal back plate, and there are 2-4 brake blocks and their actuators installed on the caliper body across the two sides of the brake disc.
The left caliper body and the right caliper body of the traditional caliper disc brake are symmetrically arranged in position, but are different in structure, and the mounting part is arranged on the left caliper body or the right caliper body and is used for being connected with a frame, so that a brake manufacturer needs to produce two caliper bodies with different structures during manufacturing, and the cost is increased. In addition, the caliper disc brake parking function in the existing market is realized through the same piston, the parking function is designed in the driving piston on the left side or the right side, the braking structures in the left and the right caliper bodies are different, the parking function is realized through wire control or electric control, the driving function is realized through hydraulic control, the structure is complex, at least two different finished products are obtained when the brake is assembled and delivered out of a factory, the vehicle braking requirement is met, and the condition that the driving is involved after the parking failure exists.
Disclosure of Invention
The invention aims to provide a pure hydraulic control parking and driving integrated caliper disc brake aiming at the defects in the prior art, which can realize service braking and parking braking, is independent and non-interfering with each other, realizes reliable braking, has a completely symmetrical left-right structure, reduces the variety of parts, reduces the manufacturing cost and has higher universality.
The technical scheme for realizing the aim of the invention is as follows:
a pure hydraulic control driving and parking integrated caliper disc brake comprises two caliper bodies which have the same structure and are symmetrically and fixedly connected, wherein a driving cavity and a parking cavity which are mutually independent are arranged in each caliper body, the driving cavities on the caliper bodies on the two sides are mutually communicated and are provided with driving oil inlets, and the parking cavities on the caliper bodies on the two sides are mutually communicated and are provided with parking oil inlets; a service braking unit and a parking braking unit are respectively arranged in the service cavity and the parking cavity in a sealing manner, friction plates are symmetrically arranged on the inner sides of the two caliper bodies, and an installation space suitable for accommodating a brake disc is formed between the two friction plates; a braking gap is arranged between the service braking unit and the friction plate, and a flexible return mechanism is connected between the parking braking unit and the friction plate; through holes are formed in the two pliers bodies, and long bolts which penetrate through the two through holes and are suitable for being screwed on a vehicle body are arranged in the two through holes.
The traveling crane braking unit comprises a traveling crane piston which is arranged in a traveling crane cavity in a sliding sealing mode, a stop sealing rod is arranged at one end, away from the friction plate, of the traveling crane piston, one end of the stop sealing rod is movably inserted into the traveling crane piston, the other end of the stop sealing rod extends to the outside of the clamp body, an O-shaped ring is arranged between the O-shaped ring and the clamp body, a gasket and a fastening nut which are coaxially arranged on the stop sealing rod are sequentially arranged on the outside of the clamp body, and the stop sealing rod is fixedly connected with the clamp body through the fastening nut and the gasket; an annular installation space is defined among the stop sealing rod, the travelling crane piston and the clamp body, and a travelling crane abrasion self-compensating device suitable for adjusting the relative position of the travelling crane piston and the stop sealing rod is arranged in the annular installation space.
Further, driving wearing and tearing self-compensating device establishes interval distribution's T shape clamp plate and holding ring on the locking sealing rod including establishing in proper order, the terminal surface of T type clamp plate is equipped with a plurality of through-holes, the inner circle and the locking sealing rod clearance fit of T type clamp plate, one side that the friction disc was kept away from to the outer lane is equipped with the hole of fixed mounting on driving piston and uses circlip, the inner circle and the locking sealing rod interference fit and the interference of holding ring are F1, the butt has driving dish spring subassembly between T type clamp plate and the holding ring, driving dish spring subassembly's elasticity is F2 and satisfies F2 < F1.
Furthermore, an inner hexagonal counter bore is formed in the end face of the other end of the stopping sealing rod.
Further, parking braking unit includes parking piston and parking push rod that sliding seal located the parking intracavity, be connected with parking wearing and tearing self-compensating device between parking piston and the parking push rod, the one end that the friction disc was kept away from to the parking piston is equipped with the ring channel, the butt has parking dish spring subassembly between ring channel and the pincers body.
Furthermore, the parking abrasion self-compensation device comprises an abrasion compensation ring coaxially arranged on the parking push rod, a gap is formed between the outer ring of the abrasion compensation ring and the inner ring of the piston, female threads are arranged on the inner ring, corresponding male threads are arranged on the outer ring of the parking push rod, the cross section of each female thread is in a right trapezoid shape, and the cross section of each male thread is in a right triangle shape; the axial positions of the abrasion compensation ring and the parking piston are relatively fixed, and a thrust ball bearing is connected between the abrasion compensation ring and the parking piston.
Further, the end face, far away from the friction disc, of the parking push rod is provided with a groove in the horizontal direction, the flexible return mechanism comprises a guide rod which is arranged in the groove and penetrates through the parking push rod, one end of the guide rod is fixedly connected with the friction disc, a return spring which is sleeved on the guide rod and is pre-compressed is arranged between the other end of the guide rod and the parking push rod, and the elastic force of the return spring is smaller than the sealing force between the parking push rod and the clamp body.
Furthermore, the parking cavity is positioned at the center of the clamp body, and two driving cavities on each clamp body are communicated with each other and are respectively positioned at two sides of the parking cavity; the top of the clamp body is provided with parking oil pipes which are respectively communicated with the two parking cavities; the side of the pliers body is provided with a travelling crane oil pipe, and two ends of the travelling crane oil pipe are respectively communicated with the travelling crane cavities on the two pliers bodies.
Furthermore, a first dustproof ring is arranged between one side of the service cavity, which is close to the friction plate, and the service brake unit; and a second dustproof ring is arranged between one side of the parking cavity, which is close to the friction plate, and the parking braking unit.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the two caliper bodies are structurally optimized, the traditional design is changed, the structure is completely the same, the types of parts are reduced, the manufacturing cost is reduced, the whole brake is of a symmetrical structure and is arranged on a vehicle body through the long bolt, and the universality is higher; in addition, the invention breaks through the traditional design on the braking structure, can realize service braking and parking braking on the premise of keeping the size of the original brake, has independent and non-interfering braking, is hydraulically controlled, is more stable in braking, does not need to additionally increase a wire control or electric control system, and reduces the complexity of the whole vehicle.
(2) The service brake unit changes the design that all parts are required to be pressed into a service cavity in sequence in the traditional structure, realizes the modular design of the brake unit, and because the stop sealing rod of the brake unit is fixed with the caliper body through the fastening nut positioned outside the caliper body, a service piston, a service wear self-compensation device and the stop sealing rod can be assembled into a whole in advance and then installed in the service cavity in the actual assembly process, the modular design not only can improve the production efficiency, but also can carry out corresponding performance detection on the assembled brake unit, improve the quality and reduce the reject ratio.
(3) The self-compensating device for the travelling crane wear is simple in structure, convenient to control, high in structural stability, completely located inside a travelling crane piston, free of any external interference, good in operating environment and high in reliability.
(4) According to the invention, the hexagonal counter bore is arranged on the end face of the stop sealing rod, so that the fastening nut and the gasket can be conveniently screwed, and follow-up rotation is prevented.
(5) The parking brake unit is also provided with a parking abrasion self-compensating device, so that the reliability of a brake system is improved, the parking brake force is provided by the parking disc spring assembly, the parking brake force is convenient and accurate to calculate, the controllability is higher, the axial size is small, the rigidity is stable, and the range is large.
(6) The parking abrasion self-compensating device adopts an abrasion compensating ring with an ingenious structure, the abrasion compensating ring is relatively fixed with the axial position between the parking abrasion self-compensating device and a parking piston, a special thread structure is arranged between the parking abrasion self-compensating device and a parking push rod, the parking abrasion self-compensating device can relatively rotate when the inclined edges of a female thread and a male thread are tightly attached and stressed, so that the parking abrasion self-compensating device and the parking push rod can axially move relatively, the parking abrasion self-compensating device can not rotate under the self-locking effect when the right-angle edges of the female thread and the male thread are tightly attached and stressed, further, the parking abrasion self-compensating device and the parking push rod do not move relatively, friction plates are pressed against each other, automatic compensation can be realized when abrasion occurs, complex transmission is abandoned in the integral structure design, related parts are few, the cost is reduced, and meanwhile, and the reliability is higher.
(7) The flexible return assembly adopts a structure that the guide rod and the return spring are combined, so that the return force can be provided, and meanwhile, the guide rod provides a certain guiding function for the movement of the friction plate, so that the parking brake is more stable.
(8) According to the invention, the parking cavity is arranged in the middle of the caliper body, and the two sides of the parking cavity are respectively provided with the traveling cavities, so that the layout is more reasonable, the braking is more stable, the uneven abrasion of the friction plate is avoided, and the utilization rate of the friction plate is improved; meanwhile, the parking cavities on the two clamp bodies are communicated through the external parking oil pipe, and the driving cavities on the two clamp bodies are communicated through the external driving oil pipe, so that the complex oil circuit is prevented from being arranged on the clamp bodies, and the cost is reduced.
(9) According to the invention, the dustproof rings are arranged on the driving cavity and the parking cavity, so that the inner cavity is protected, and the situation that the piston is not moved smoothly and the braking effect is influenced because external dust or friction debris enters the cavity is avoided.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a front view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a schematic view of the mounting structure of the present invention to a vehicle body;
FIG. 4 is a schematic view of the friction plate and bracket mounting arrangement of the present invention;
FIG. 5 is a cross-sectional view taken along plane A-A of FIG. 2 (drive in schedule);
FIG. 6 is a diagram of a park fuel inlet schedule of the present invention;
FIG. 7 is a schematic structural diagram of a service brake unit according to the present invention;
FIG. 8 is a diagram of the detection of the self-compensating device for wear of the traveling crane according to the present invention;
FIG. 9 is a schematic structural view of a parking brake unit according to the present invention;
FIG. 10 is an enlarged view of the threads of the inventive wear compensation ring and parking pushrod.
The reference numbers in the drawings are:
the parking brake device comprises a clamp body 1, a traveling oil inlet 2, a parking oil inlet 3, a traveling brake unit 4, a traveling piston 4-1, a stop sealing rod 4-2, a gasket 4-3, a fastening nut 4-4, an inner hexagonal counter bore 4-5, a T-shaped pressing plate 4-6, a positioning ring 4-7, a hole elastic check ring 4-8, a traveling disc spring group 4-9, a parking brake unit 5, a parking piston 5-1, a parking push rod 5-2, a parking disc spring assembly 5-3, a thrust ball bearing 5-4, an abrasion compensation ring 5-5, a copper pad 5-6, a round nut 5-7, a second sealing ring 5-8, a friction plate 6, a flexible return mechanism 7, a guide rod 7-1, a return spring 7-2, a long bolt 8, a parking oil pipe 9, a traveling oil pipe 10, a support 11, a long bolt 7-2, a parking brake device, The chute 11-1.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
(example 1)
The pure hydraulic control line parking integrated caliper disc brake shown in fig. 1 to 7 comprises two caliper bodies 1 which are symmetrically arranged front and back and have the same structure, wherein each caliper body 1 is provided with a driving cavity and a parking cavity which are mutually independent, the driving cavities on the two caliper bodies 1 are mutually communicated and are provided with driving oil inlets 2, and the parking cavities on the two caliper bodies 1 are mutually communicated and are provided with parking oil inlets 3. A service braking unit 4 and a parking braking unit 5 are respectively arranged in each service cavity and the parking cavity in a sealing mode, friction plates 6 are symmetrically arranged on the inner sides of the two caliper bodies 1, an installation space suitable for containing a brake disc is formed between the two friction plates 6, a braking gap is formed between each service braking unit 4 and each friction plate 6, and a flexible return mechanism 7 is connected between each parking braking unit 5 and each friction plate 6. The two clamp bodies 1 are provided with through holes and a long bolt 8 penetrating through the two through holes, and the clamp bodies 1 are screwed on the vehicle body through the long bolt 8. This embodiment is through carrying out configuration optimization to two pincers bodies 1, changes traditional design, makes its structure identical, reduces the part kind, reduces manufacturing cost to whole stopper is symmetrical structure, need not to consider left side installation or right side installation, and the commonality is higher. The brake structure breaks through the traditional design, under the premise of keeping the size of the original brake, the brake device can realize service braking and parking braking, and the two types of braking are independent and do not interfere with each other, are controlled by hydraulic pressure, are more stable in braking, do not need to be additionally provided with a drive-by-wire or an electric control system, and reduce the complexity of the whole vehicle.
Specifically, the parking chamber is located the center department of the pincers body 1, and the driving chamber on every pincers body 1 all is equipped with two and communicates each other, and is located the both sides in parking chamber respectively, and the overall arrangement is more reasonable, and the braking is more steady, avoids friction disc 6 wearing and tearing inequality in long-term the use, improves friction disc 6's utilization ratio. The bottoms of two driving cavities on the same pliers body 1 are communicated with oil passages arranged on the pliers body 1, so that the overall dimension is reduced. The top of the clamp body 1 is provided with a parking oil pipe 9 which is respectively communicated with the two parking cavities; the side of the pincers body is installed driving oil pipe 10, and the both ends of driving oil pipe 10 communicate respectively the driving chamber on two pincers bodies 1, and this embodiment realizes the intercommunication through external oil pipe, avoids offering complicated oil circuit, reduce cost on pincers bodies 1. During actual manufacturing, a plurality of inlets can be formed in the processing cavity, the plug can be pre-installed to realize sealing, and the air release valve is replaced according to the installation position and the requirement to exhaust air in the cavity, or the adapter is replaced to be used for communicating oil or connecting an oil pipe to the cavity to form a closed oil way. As shown in fig. 4, brackets 11 are fixedly and symmetrically installed on both sides of the caliper body 1, a sliding groove 11-1 is formed on the inner side of the bracket 11, and the friction plate 6 is slidably installed in the sliding groove 11-1, so that the brake disc is pressed under the action of the braking unit.
The driving oil inlet scheme is as shown in fig. 5, after entering from a driving oil inlet 2 of a right driving cavity, the oil enters an oil circuit which is interconnected with a left driving cavity and a right driving cavity at the bottom, enters a left driving cavity, and continues to enter a driving oil pipe 10 upwards, so that the oil enters a driving cavity of a rear side caliper body 1, and thus, a driving brake oil circuit of the whole brake is formed. The parking oil inlet scheme is as shown in fig. 6, the parking oil enters the parking cavity from the parking oil inlet 3, one path of the parking oil fills the parking oil cavity on one side, the other path of the parking oil enters the parking oil pipe 9, and the parking oil enters the parking cavity on the rear side.
As shown in FIG. 7, the service brake unit 4 includes a service piston 4-1, a stopper sealing rod 4-2 and a service wear self-compensating device. A first sealing ring is embedded in the travelling crane cavity, and the inner ring of the first sealing ring is in interference fit with the outer ring of the travelling crane piston 4-1, so that the travelling crane piston 4-1 is arranged in the travelling crane cavity in a sliding and sealing manner. The right end of the stop sealing rod 4-2 is movably inserted into the traveling piston 4-1, the left end of the stop sealing rod extends to the outside of the clamp body 1, an O-shaped ring is arranged between the left end of the stop sealing rod and the clamp body 1, a gasket 4-3 and a fastening nut 4-4 are sequentially and coaxially arranged on the stop sealing rod 4-2 extending to the outside of the clamp body 1, an inner hexagonal counter bore 4-5 is formed in the left end face of the stop sealing rod 4-2, the stop sealing rod 4-2 is clamped by inserting an inner hexagonal tool into the inner hexagonal counter bore 4-5, the fastening nut 4-4 and the gasket 4-3 are conveniently screwed, and follow-up rotation is prevented.
The stop sealing rod 4-2, the travelling crane piston 4-1 and the clamp body 1 enclose an annular installation space, and the travelling crane abrasion self-compensation device is arranged in the annular installation space and comprises a T-shaped pressing plate 4-6, a positioning ring 4-7, a hole elastic check ring 4-8 and a travelling crane disc spring group 4-9. The T-shaped pressing plate 4-6 and the positioning ring 4-7 are sleeved on the stop sealing rod 4-2 at intervals, and the end face of the T-shaped pressing plate 4-6 is provided with a plurality of through holes, so that hydraulic oil can conveniently enter an area enclosed by the right side and the traveling crane piston 4-1. The inner ring of the T-shaped pressing plate 4-6 is in clearance fit with the stop sealing rod 4-2, the elastic check ring 4-8 for the hole is positioned on the left side of the T-shaped pressing plate 4-6 and is fixedly arranged on the inner ring of the traveling crane piston 4-1, the inner ring of the positioning ring 4-7 is in interference fit with the stop sealing rod 4-2, the interference force is F1, the traveling crane disc spring assembly 4-9 is abutted between the T-shaped pressing plate 4-6 and the positioning ring 4-7, the elastic force is F2, and F2 is smaller than F1. The whole structure is simplified, the control is convenient, the structural stability is improved, and the piston is completely positioned inside the traveling crane piston, so that the external interference is avoided, the operating environment is excellent, and the reliability is high.
When the brake is not worn, the driving piston 4-1 pushes the friction plate 6 to press the brake disc to realize braking, and at the moment, the elastic force F of the driving disc spring assembly 4-9 2 The interference force F between the inner ring of the positioning ring 4-7 and the stop sealing rod 4-2 is smaller 1 Therefore, the traveling crane piston 4-1 drives the T-shaped pressing plate to compress the traveling crane disc spring component 4-9 in a preset systemIn the range of the dynamic clearance, the T-shaped pressure plate 4-6 is not directly contacted with the positioning ring 4-7, and the positioning ring 4-7 is kept still; when the friction plate 6 is worn by delta, the traveling crane piston 4-1 drives the T-shaped pressure plate 4-6 to compress the traveling crane disc spring assembly 4-9, and the braking force of the traveling crane is far larger than the interference force F 1 When the T-shaped pressure plate 4-6 is contacted with the positioning ring 4-7, the positioning ring 4-7 is continuously pushed to move until service braking is realized, and when service is relieved, the positioning ring 4-7 is kept still, so that the initial position of the service piston 4-1 is changed, the service piston moves delta relative to the stop sealing rod 4-2 towards the friction plate 6, the abrasion of the friction plate 6 is just compensated, and the automatic abrasion compensation is realized.
The service brake unit 4 of the embodiment changes the design that all parts need to be pressed into a service cavity in sequence in the traditional structure, and realizes the modular design of the brake unit, and the stop sealing rod 4-2 of the brake unit is fixed with the caliper body 1 through the fastening nut 4-4 positioned outside the caliper body 1, so that the service piston 4-1, the service wear self-compensating device and the stop sealing rod 4-2 can be assembled into a whole in advance during actual assembly, and then the service wear self-compensating device and the stop sealing rod are installed in the service cavity, and the modular design not only can improve the production efficiency, but also can perform corresponding performance detection on the assembled brake unit, improve the quality and reduce the reject ratio. As shown in figure 8, in order to avoid the adjustment failure caused by the overlarge elastic force of the service disc spring assembly 4-9 or the undersize interference force between the positioning ring 4-7 and the stop sealing rod 4-2, the service brake unit 4 is placed on a detection platform as an integral module, a tool matched with a T-shaped pressing plate 4-6 is adopted and placed on the T-shaped pressing plate, a vertical downward force F 'is applied to the tool, and F2 < F' < F1. And after the braking clearance distance D is moved downwards, unloading the F', detecting the actual displacement of the tool, and if the actual displacement is smaller than the value D, indicating that the positioning ring 4-7 is moved, or after the travelling crane disc spring assembly 4-9 is pressed in place, judging that the adjustment is invalid and performing disassembly inspection if the thrust is too large. And the qualification rate of finished products is effectively improved in a pre-detection mode.
As shown in fig. 9, the parking brake unit 5 includes a parking piston 5-1, a parking push rod 5-2, a parking disc spring assembly 5-3 and a parking abrasion self-compensation device, the parking piston 5-1 and the parking push rod 5-2 are slidably and hermetically disposed in a parking cavity from left to right, an annular groove is disposed at the left end of the parking piston 5-1, the parking disc spring assembly 5-3 is disposed in the annular groove, and two ends of the parking disc spring assembly 5-3 are abutted to the caliper body 1 and the parking piston 5-1, and in actual application, a proper adjusting pad is disposed between the parking disc spring assembly 5-3 and the parking piston 5-1 to adjust an initial compression amount of the parking disc spring assembly 5-3, so as to adjust parking brake force. The parking abrasion self-compensation device is positioned between a parking piston 5-1 and a parking push rod 5-2 and comprises a thrust ball bearing 5-4, an abrasion compensation ring 5-5, a copper pad 5-6 and a round nut 5-7 which are sequentially arranged from left to right. The left side of the inner ring of the parking piston 5-1 is provided with a step, a round nut 5-7 is fixedly arranged at the right end of the inner ring of the parking piston 5-1, and the right end face of the round nut is flush with the right end face of the parking piston 5-1. A fixed gap is formed between the step and the round nut 5-7 and used for placing a thrust ball bearing 5-4, a wear compensation ring 5-5 and a copper pad 5-6, and a gap is formed between the outer ring of the wear compensation ring 5-5 and the inner ring of the parking piston 5-1, so that the wear compensation ring 5-5 is coaxially and rotatably arranged on the inner ring of the parking piston 5-1 and is axially fixed relative to the parking piston 5-1.
As shown in fig. 10, female threads are arranged on an inner ring of the wear compensation ring 5-5, corresponding male threads are arranged on an outer ring of the parking push rod 5-2, the cross section of the female threads is right trapezoid, the cross section of the male threads is right triangle, and in an initial state, a gap which is the same as a braking gap is arranged between two straight sides of the male threads and the female threads. When the bevel edges of the female thread and the male thread are tightly attached to bear force, the abrasion compensation ring 5-5 can rotate, so that relative movement is generated between the abrasion compensation ring and the parking push rod 5-2 along the axial direction, when the straight edges of the female thread and the male thread are tightly attached to bear force, the abrasion compensation ring 5-5 cannot rotate due to self locking, and further, relative movement does not exist between the abrasion compensation ring and the parking push rod 5-2, so that the friction plate 6 is jacked, and automatic compensation can be realized when abrasion occurs.
During parking braking, the parking piston 5-1 pushes the abrasion compensation ring 5-5 to move for a braking distance and then presses the parking push rod 5-2 tightly, at the moment, the right-angle edges of the threads are attached, and the friction plate 6 is deadened to realize braking. When parking is released, oil pressure pushes the parking piston 5-1 to move leftwards in a reverse direction to brake a gap and then stops, the abrasion compensation ring 5-5 is attached to the right side of the thrust ball bearing 5-4, and as all the force of the disc spring is counteracted by the oil pressure, the abrasion compensation ring 5-5 is only attached to the parking push rod 5-2, and force is not transmitted. A second sealing ring 5-8 is arranged between the outer ring of the parking push rod 5-2 and the inner ring of the parking cavity in an interference mode, the second sealing ring 5-8 deforms in the parking brake compression process, the parking push rod 5-2 is pressed back for a distance (the distance is small and can be ignored) for restoring the original state, and the friction plate 6 is guaranteed not to be dragged and abraded.
When the friction plate 6 is subjected to delta abrasion and parking brake is applied, the parking piston 5-1 pushes the abrasion compensation ring 5-5 and the parking push rod 5-2 to move for a braking gap distance, and then the parking piston continues to move forwards for a delta distance. After parking is released, the parking piston 5-1 and the abrasion compensation ring 5-5 need to move leftwards for a distance delta continuously to enable the parking piston 5-1 to return completely. At this time, after the abrasion compensation ring 5-5 presses the parking push rod 5-2, the abrasion compensation ring 5-5 rotates and moves to the right relative to the parking push rod 5-2, so that the initial relative position of the parking push rod 5-2 and the abrasion compensation ring 5-5 is changed. When parking braking is carried out again, the parking piston 5-1 and the abrasion compensation ring 5-5 move the braking gap distance and then press the parking push rod 5-2, the stroke of the parking piston 5-1 is consistent, and the compression amount of the disc spring is kept unchanged all the time, so that the parking force is kept unchanged, and the effects of abrasion compensation and constant parking braking force are achieved.
The left end face of the parking push rod 5-2 is provided with a groove along the horizontal direction, the flexible return mechanism 7 comprises a guide rod 7-1 which is arranged in the groove and penetrates through the parking push rod 5-2, the right end of the guide rod 7-1 is fixedly connected with the friction plate 6, a return spring 7-2 which is sleeved on the guide rod 7-1 and is pre-compressed is arranged between the left end and the parking push rod 5-2, the elastic force of the return spring 7-2 is smaller than the sealing force between the parking push rod 5-2 and the caliper body 1, the return force can be provided, meanwhile, the guide rod 7-1 provides a certain guiding effect for the movement of the friction plate 6, and parking braking is more stable. When parking braking is carried out, service braking or releasing is not affected, when parking braking is released, the friction plate 6 pulls the return spring 7-2 to be compressed, but because the rigidity of the return spring 7-2 is small, the displacement is not large, and the interference compression deformation force of the second sealing ring 5-8 cannot be overcome, the parking push rod 5-2 is not moved, when service braking is released, the service piston 4-1 automatically returns, and the compressed return spring 7-2 returns the friction plate 6 to a free state to realize flexible returning.
In order to protect the inner cavity, a first dustproof ring 12 is arranged between one side, close to the friction plate 6, of the driving cavity and the driving brake unit 4, and a second dustproof ring 13 is arranged between one side, close to the friction plate 6, of the parking cavity and the parking brake unit 5, so that the situation that the piston is not moved smoothly due to the fact that external dust or friction fragments enter the cavity is avoided, and the brake effect is affected.
This embodiment stopper structure is exquisite, adopts symmetrical structure design, need not to consider left side or right side installation, and the commonality is higher to can exchange completely, two pincers bodies are first specially completely, reduce the part kind, reduce manufacturing cost. In addition, independent driving pistons and parking pistons are uniformly distributed on the two caliper bodies, abrasion self-compensation modules are designed in the pistons, the driving and parking brakes are guaranteed to be stable, the braking force is constant, and the braking force is not interfered with each other. Meanwhile, the modular design of the driving abrasion self-compensation module is realized, the driving abrasion self-compensation module can be applied to other piston brakes, the pre-detection can be carried out, the traditional press-mounting mode is changed, the overall performance is improved, the overall size is small, and the driving abrasion self-compensation module is particularly suitable for occasions with limited space. The driving and parking abrasion self-compensating device is arranged inside, thereby avoiding external interference such as silt and stone walking and the like, and being safe and reliable.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a pure hydraulic control moves integrative caliper disc brake of parking which characterized in that: the automatic parking clamp comprises two clamp bodies which have the same structure and are symmetrically and fixedly connected, wherein a travelling cavity and a parking cavity which are mutually independent are arranged in each clamp body, the travelling cavities on the clamp bodies on two sides are mutually communicated and are provided with travelling oil inlets, and the parking cavities on the clamp bodies on two sides are mutually communicated and are provided with parking oil inlets; a service braking unit and a parking braking unit are respectively arranged in the service cavity and the parking cavity in a sealing manner, friction plates are symmetrically arranged on the inner sides of the two caliper bodies, and an installation space suitable for accommodating a brake disc is formed between the two friction plates; a braking gap is arranged between the service braking unit and the friction plate, and a flexible return mechanism is connected between the parking braking unit and the friction plate; through holes are formed in the two pliers bodies, and long bolts which penetrate through the through holes and are suitable for being screwed on the vehicle body are arranged in the through holes.
2. The pure hydraulic control line parking integrated caliper disc brake according to claim 1, characterized in that: the traveling crane braking unit comprises a traveling crane piston which is arranged in a traveling crane cavity in a sliding sealing mode, a stop sealing rod is arranged at one end, away from the friction plate, of the traveling crane piston, one end of the stop sealing rod is movably inserted into the traveling crane piston, the other end of the stop sealing rod extends to the outside of the clamp body, an O-shaped ring is arranged between the O-shaped ring and the clamp body, a gasket and a fastening nut which are coaxially arranged on the stop sealing rod are sequentially arranged on the outside of the clamp body, and the stop sealing rod is fixedly connected with the clamp body through the fastening nut and the gasket; an annular installation space is defined among the stop sealing rod, the travelling crane piston and the clamp body, and a travelling crane abrasion self-compensating device suitable for adjusting the relative position of the travelling crane piston and the stop sealing rod is arranged in the annular installation space.
3. The pure hydraulic control line parking integrated caliper disc brake according to claim 2, characterized in that: the driving abrasion self-compensation device comprises a T-shaped pressing plate and a positioning ring, wherein the T-shaped pressing plate and the positioning ring are sequentially sleeved on a stop sealing rod and are distributed at intervals, the end face of the T-shaped pressing plate is provided with a plurality of through holes, the inner ring of the T-shaped pressing plate is in clearance fit with the stop sealing rod, one side, far away from a friction plate, of an outer ring is provided with an elastic check ring for holes fixedly installed on a driving piston, the inner ring of the positioning ring is in interference fit with the stop sealing rod, and the interference force is F 1 The T-shaped pressing plate is connected with the positioning ring in a butt joint mode, a travelling crane disc spring assembly is connected between the T-shaped pressing plate and the positioning ring in a butt joint mode, and the elasticity of the travelling crane disc spring assembly is F 2 And satisfy F 2 ＜F 1 。
4. The pure hydraulic control line parking integrated caliper disc brake according to claim 2, characterized in that: and the end face of the other end of the locking sealing rod is provided with an inner hexagonal counter bore.
5. The pure hydraulic control line parking integrated caliper disc brake according to claim 1, characterized in that: parking braking unit includes parking piston and parking push rod that sliding seal located the parking intracavity, be connected with parking wearing and tearing self-compensating device between parking piston and the parking push rod, the one end that the friction disc was kept away from to the parking piston is equipped with the ring channel, the butt has the parking dish spring subassembly between ring channel and the pincers body.
6. The pure hydraulic control line parking integrated caliper disc brake according to claim 5, characterized in that: the parking abrasion self-compensation device comprises an abrasion compensation ring coaxially arranged on a parking push rod, a gap is formed between an outer ring of the abrasion compensation ring and an inner ring of a piston, female threads are arranged on the inner ring, corresponding male threads are arranged on the outer ring of the parking push rod, the cross section of each female thread is in a right trapezoid shape, and the cross section of each male thread is in a right triangle shape; the axial positions of the abrasion compensation ring and the parking piston are relatively fixed, and a thrust ball bearing is connected between the abrasion compensation ring and the parking piston.
7. The pure hydraulic control line parking integrated caliper disc brake according to claim 5, characterized in that: the end face, far away from the friction disc, of the parking push rod is provided with a groove along the horizontal direction, the flexible return mechanism comprises a guide rod which is arranged in the groove and penetrates through the parking push rod, one end of the guide rod is fixedly connected with the friction disc, a return spring which is sleeved on the guide rod and is pre-compressed is arranged between the other end of the guide rod and the parking push rod, and the elastic force of the return spring is smaller than the sealing force between the parking push rod and a clamp body.
8. The pure hydraulic control line parking integrated caliper disc brake according to claim 1, characterized in that: the parking cavities are positioned at the center of the clamp body, and two driving cavities on each clamp body are communicated with each other and are respectively positioned at two sides of the parking cavities; the top of the clamp body is provided with parking oil pipes which are respectively communicated with the two parking cavities; the side of the pincers is installed with a traveling crane oil pipe, and the two ends of the traveling crane oil pipe are respectively communicated with the traveling crane cavities on the two pincers.
9. The pure hydraulic control line parking integrated caliper disc brake according to claim 1, characterized in that: a first dustproof ring is arranged between one side of the service cavity, which is close to the friction plate, and the service braking unit; and a second dustproof ring is arranged between one side of the parking cavity, which is close to the friction plate, and the parking braking unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210890328.XA CN115076263A (en) | 2022-07-27 | 2022-07-27 | Pure hydraulic control moves integrative caliper disc brake of parking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210890328.XA CN115076263A (en) | 2022-07-27 | 2022-07-27 | Pure hydraulic control moves integrative caliper disc brake of parking |
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| CN115076263A true CN115076263A (en) | 2022-09-20 |
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| CN202210890328.XA Pending CN115076263A (en) | 2022-07-27 | 2022-07-27 | Pure hydraulic control moves integrative caliper disc brake of parking |
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|---|---|---|---|---|
| US5921356A (en) * | 1996-10-08 | 1999-07-13 | Meritor Heavy Vehicle Systems, L L C | Adjustable parking brake integrated with service brake |
| KR20070035824A (en) * | 2005-09-28 | 2007-04-02 | 기아자동차주식회사 | Device of keeping brake fluid for an automobile |
| US20120085598A1 (en) * | 2010-10-12 | 2012-04-12 | Ausco Products, Inc. | Caliper brake |
| CN108368896A (en) * | 2015-08-21 | 2018-08-03 | 自由车辆技术有限公司 | brake caliper |
| CN110877605A (en) * | 2019-10-18 | 2020-03-13 | 温州图伟制动器有限公司 | Integrated electronic parking brake |
| CN112377539A (en) * | 2020-10-13 | 2021-02-19 | 东风汽车集团有限公司 | Brake device and vehicle |
| CN113531017A (en) * | 2021-09-17 | 2021-10-22 | 中车戚墅堰机车车辆工艺研究所有限公司 | Wear compensation device of driving disc brake and self-compensation method thereof |
| US20210348663A1 (en) * | 2020-05-08 | 2021-11-11 | Akebono Brake Industry Co., Ltd. | Opposed brake caliper with park brake function |
| CN215980559U (en) * | 2021-10-12 | 2022-03-08 | 南方天合底盘系统有限公司 | Active return function spring piece assembly and low-drag fixed brake caliper assembly |
-
2022
- 2022-07-27 CN CN202210890328.XA patent/CN115076263A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5921356A (en) * | 1996-10-08 | 1999-07-13 | Meritor Heavy Vehicle Systems, L L C | Adjustable parking brake integrated with service brake |
| KR20070035824A (en) * | 2005-09-28 | 2007-04-02 | 기아자동차주식회사 | Device of keeping brake fluid for an automobile |
| US20120085598A1 (en) * | 2010-10-12 | 2012-04-12 | Ausco Products, Inc. | Caliper brake |
| CN108368896A (en) * | 2015-08-21 | 2018-08-03 | 自由车辆技术有限公司 | brake caliper |
| CN110877605A (en) * | 2019-10-18 | 2020-03-13 | 温州图伟制动器有限公司 | Integrated electronic parking brake |
| US20210348663A1 (en) * | 2020-05-08 | 2021-11-11 | Akebono Brake Industry Co., Ltd. | Opposed brake caliper with park brake function |
| CN112377539A (en) * | 2020-10-13 | 2021-02-19 | 东风汽车集团有限公司 | Brake device and vehicle |
| CN113531017A (en) * | 2021-09-17 | 2021-10-22 | 中车戚墅堰机车车辆工艺研究所有限公司 | Wear compensation device of driving disc brake and self-compensation method thereof |
| CN215980559U (en) * | 2021-10-12 | 2022-03-08 | 南方天合底盘系统有限公司 | Active return function spring piece assembly and low-drag fixed brake caliper assembly |
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