CN111365383B

CN111365383B - Truck brake

Info

Publication number: CN111365383B
Application number: CN202010228222.4A
Authority: CN
Inventors: 许恩永; 何水龙; 冯高山; 赵德平; 陈钰烨; 张释天
Original assignee: Guilin University of Electronic Technology; Dongfeng Liuzhou Motor Co Ltd
Current assignee: Guilin University of Electronic Technology; Dongfeng Liuzhou Motor Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-04-30
Anticipated expiration: 2040-03-27
Also published as: CN111365383A

Abstract

The invention discloses a truck brake, which comprises a first clamping component and a second clamping component, wherein the first clamping component is arranged on the first clamping component; the first clamping assembly comprises a fixed seat fixed on a truck suspension, a piston group arranged in the fixed seat in a sliding mode and with one end extending outwards, and a first brake pad fixed at the outer end of the piston group; an oil port is arranged outside the fixed seat, and a first sliding cavity matched with the piston group and a first oil delivery channel communicated with the oil port and the first sliding cavity are arranged inside the fixed seat; the second clamping assembly comprises a connecting frame connected with the fixed seat and a second brake pad fixed on the inner side of the connecting frame; the second brake pad and the first brake pad are opposite to each other, and an interlayer space exists. The invention can lead the deceleration and braking processes to be carried out relatively stably without strictly and uniformly controlling the action of pedal pressing, thereby improving the experience degree of driving and traveling and improving the braking safety.

Description

Truck brake

Technical Field

The invention relates to the technical field of truck production and manufacturing, in particular to a truck brake.

Background

The brake system of the existing truck is usually controlled by hydraulic pressure, and comprises a brake pedal, a vacuum booster, a master cylinder for storing brake fluid, wheel cylinders distributed at each wheel and brakes thereof; the master cylinder and each slave cylinder are connected through oil pipes, and hydraulic driving force is provided through brake fluid. Among them, the disc brake is widely used in the middle and high-end truck brake system due to its excellent performance in many aspects such as fast and effective braking effect, good braking heat fading, etc. The braking effect of current stopper is comparatively quick and urge, and when pedal brake pedal, it can make the truck stop fast, but this has also caused the inertia risk that produces and the ride comfort of driving when the vehicle stops suddenly, and the driver need strictly and slowly control own pedal dynamics and press the stroke and just can make the speed reduction and the braking process of vehicle go on steadily, consequently, this foot power that needs the driver presses the action and possesses good accuse technical ability. For drivers who are not skilled in driving, due to the fact that pedal stroke control is not skilled, intermittent 'forward-urging' action is easy to occur in the braking process of the vehicle, even the vehicle is suddenly braked to cause the problem that articles in the vehicle fall or other personal safety problems, and the driving and running experience degree is greatly reduced.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the problems occurring in the prior art.

Therefore, one of the objectives of the present invention is to provide a truck brake, which can solve the problems of the prior art that the braking process is not smooth and the control force is difficult.

In order to solve the technical problems, the invention provides the following technical scheme: a truck brake, comprising: the first clamping assembly comprises a fixed seat fixed on a truck suspension, a piston group arranged in the fixed seat in a sliding mode and with one end extending outwards, and a first brake pad fixed at the outer end of the piston group; an oil port is arranged outside the fixed seat, and a first sliding cavity matched with the piston group and a first oil delivery channel communicated with the oil port and the first sliding cavity are arranged inside the fixed seat; the second clamping assembly comprises a connecting frame connected with the fixed seat and a second brake pad fixed on the inner side of the connecting frame; the second brake pad and the first brake pad are opposite to each other, and an interlayer space exists.

As a preferable aspect of the truck brake of the present invention, wherein: a connecting column is arranged on the other side, opposite to the first brake pad, of the fixed seat, and a second oil delivery channel extending to the first sliding cavity is arranged inside the connecting column; the connecting frame comprises a first outer edge part, a second outer edge part and a connecting plate connected between the first outer edge part and the second outer edge part; a second sliding cavity matched with the connecting column is arranged on the first outer edge part, and the connecting column is inserted into the second sliding cavity; the second brake pad is fixed to the inner side of the second outer edge portion, and a first reset piece is arranged between the second outer edge portion and the fixing seat.

As a preferable aspect of the truck brake of the present invention, wherein: the piston group comprises a first sliding part, a second sliding part and a first elastic part connected between the first sliding part and the second sliding part; the first sliding part is positioned at the outer end of the second sliding part and at least partially extends out of the first sliding cavity; a second reset piece is arranged between the first sliding piece and the outer port of the first sliding cavity; when the first elastic piece is in a natural state, the second sliding piece can block the inner port of the second oil delivery channel; when the first brake pad contacts the brake disc and the first elastic piece is compressed and shortened, the second sliding piece can be dislocated with the inner port of the second oil delivery channel and is unblocked.

As a preferable aspect of the truck brake of the present invention, wherein: the first sliding piece comprises an outer end head connected with the first brake pad, a plug-in cylinder fixed on the inner end of the outer end head, and a circle of limiting ring arranged on the periphery of the outer end head; an accommodating groove is formed in the outer port of the first sliding cavity, one end of the second resetting piece is embedded into the accommodating groove, and the other end of the second resetting piece abuts against the outer side surface of the limiting ring; one end of the second sliding part corresponding to the first sliding part is provided with an annular groove corresponding to the insertion cylinder, and the other end of the second sliding part is provided with an inwards concave pressure groove.

As a preferable aspect of the truck brake of the present invention, wherein: a third oil delivery channel connected between the first oil delivery channel and the second oil delivery channel is further arranged inside the fixed seat, an accommodating cavity is formed in the third oil delivery channel, and a ball body and a second elastic piece are arranged in the accommodating cavity; the outer diameter of the ball body is smaller than the accommodating cavity and larger than the third oil conveying channel, one end of the second elastic piece abuts against the ball body, and the other end of the second elastic piece abuts against one end, corresponding to the first oil conveying channel, of the accommodating cavity.

As a preferable aspect of the truck brake of the present invention, wherein: and sealing ring fixing grooves are formed in the inner side walls of the first sliding cavity and the second sliding cavity, and sealing rings are arranged in the sealing ring fixing grooves.

As a preferable aspect of the truck brake of the present invention, wherein: the fixed seat is provided with a guide strip; a guide groove matched with the guide strip is formed in the inner side wall of the connecting plate, and an embedded groove is formed in one end, corresponding to the second outer edge, of the guide groove; the guide strip can be inserted into the guide groove from the embedded groove and can slide in the guide groove relatively; the length direction of the guide groove is consistent with the length direction of the connecting column.

As a preferable aspect of the truck brake of the present invention, wherein: the second outer edge part is connected with the fixed seat through a guide bolt; the tail end of a bolt rod of the guide bolt is provided with a screw rod section, and the outer end face of the fixed seat is provided with a screw hole matched with the screw rod section; a through hole matched with the outer diameter of the bolt rod is formed in the second outer edge part; the guide bolt penetrates through the through hole and is fixedly connected with the screw hole through a screw rod section at the tail end of the guide bolt; the first reset piece is sleeved on the periphery of the screw section, one end of the first reset piece abuts against the inner side face of the second outer edge portion, and the other end of the first reset piece abuts against the outer end face of the fixed seat.

As a preferable aspect of the truck brake of the present invention, wherein: the first brake pad is detachably mounted to an outer end of the first slider; the second brake pad is detachably mounted inside the second outer edge portion; the first brake pad and the second brake pad are identical and symmetrical in structure, and both comprise a bottom plate and a plurality of friction plates which are detachably arranged and fixed on the bottom plate.

As a preferable aspect of the truck brake of the present invention, wherein: at least two groups of piston groups are arranged in the fixed seat, and a first sliding cavity, a first oil delivery channel, a second oil delivery channel and a third oil delivery channel which are matched with the piston groups are arranged in the fixed seat; the outer ends of the piston groups are uniformly connected with the first brake pad, and the first oil delivery channels are gathered in one path in the fixed seat and are simultaneously communicated with the oil ports.

The invention has the beneficial effects that: in the braking process, the early-stage single-side friction braking can play a transitional retarding role so as to stably reduce the vehicle speed; when the vehicle body traveling speed is reduced to a certain degree, final parking can be achieved under the clasping of the double-side friction brakes. Therefore, the deceleration and braking processes of the vehicle can be carried out stably, the pedal pressing action does not need to be controlled strictly and uniformly, the driving and traveling experience is improved, and the braking safety is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is an overall structural view of a truck brake.

Fig. 2 is a schematic view of a truck brake in combination with a drive plate.

Fig. 3 is an outer side structure view of the second clamping assembly.

Fig. 4 is an internal structure view of the fixing base.

Fig. 5 is a cross-sectional view of a truck brake.

Fig. 6 is a detailed view of the structure at a in fig. 5.

Fig. 7 is an exploded view of the truck brake.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Referring to fig. 1-7, an embodiment of the present invention provides a truck brake including a first clamp assembly 100 and a second clamp assembly 200 capable of relative movement.

The first clamping assembly 100 includes a fixed seat 101 fixed to a truck suspension strut, a piston assembly 102 slidably disposed in the fixed seat 101 and having an outer end extending outward, and a first brake pad 103 fixed to an outer end of the piston assembly 102. An oil port 101a connected to the master cylinder is provided outside the fixed seat 101, and a first sliding chamber 101b fitted to the piston assembly 102 and a first oil delivery passage 101c communicating the oil port 101a and the first sliding chamber 101b are provided inside the fixed seat 101.

The second clamping assembly 200 comprises a connecting frame 201 connected with the fixed seat 101 and a second brake pad 202 fixed on the inner side of the connecting frame 201; the second brake pad 202 and the first brake pad 103 are opposed to each other, and an interlayer space exists. The brake disc is fixed to the hub with its edge portion extending into the sandwich space between the second brake pad 202 and the first brake pad 103. The master cylinder can inject brake fluid into the oil port 101a through an oil pipe, and the brake fluid is filled into the first sliding cavity 101b to push the piston group 102 to slide outwards, so that the first brake pad 103 can gradually approach the brake disc, and can clamp the brake disc together with the second brake pad 202 to realize braking action on the brake disc and the wheel.

Further, the connecting frame 201 includes a first outer edge 201a, a second outer edge 201b and a connecting plate 201c connected therebetween. The first and second

outer edge portions

201a and 201b are arc-shaped plate structures at the two ends of the connecting frame 201, and the connecting plate 201c is a plate structure connected between the first and second

outer edge portions

201a and 201b, and they are preferably integrally formed. The first outer edge portion 201a is connected to the fixing base 101, and the second brake pad 202 is fixed to the inside of the second outer edge portion 201 b.

A connection column 101d is disposed on the other side of the fixed seat 101 opposite to the first brake pad 103, an extending direction of the connection column 101d is opposite to an opening direction of the first sliding chamber 101b, and a second oil delivery passage 101e extending to the first sliding chamber 101b is disposed inside the connection column 101 d.

The first outer edge 201a is provided with a second sliding cavity 201a-1 which is matched with the connecting column 101d, and the connecting column 101d is inserted into the second sliding cavity 201a-1 and can slide relatively. Therefore, the brake fluid introduced into the first sliding chamber 101b through the oil port 101a can also be introduced into the second sliding chamber 201a-1 through the second oil delivery passage 101e and press the push connection column 101 d; since the connecting column 101d is provided on the other side of the fixing base 101 with respect to the first brake pad 103, the second brake pad 202 can move in a direction to approach the first brake pad 103; finally, the first brake pad 103 and the second brake pad 202 which move towards each other can jointly sandwich the brake disc, thereby achieving braking.

A first reset piece 203 is disposed between the second outer edge 201b and the fixing base 101. The first restoring member 203 may be a compression spring for releasing the restoring stroke of the second clamping assembly 200 after braking, and may push the connecting frame 201 so that the second brake pad 202 is away from the first brake pad 103.

Further, the piston set 102 includes a first sliding member 102a, a second sliding member 102b and a first elastic member 102c connected therebetween, and the first elastic member 102c is a compression spring having a tendency to separate the first sliding member 102a from the second sliding member 102 b. The first slide 102a is located at the outer end of the second slide 102b and protrudes at least partially out of the first slide cavity 101b, and the first brake pad 103 is fixed to the outer end head of the first slide 102 a; a second reset piece 102d is disposed between the outer port of the first sliding cavity 101b and the first sliding piece 102a, and is used for resetting the piston assembly 102.

When the first elastic member 102c is in the naturally elongated state, the second slider 102b can completely close the inner port of the second oil delivery passage 101e (i.e., a port at which the second oil delivery passage 101e communicates with the first sliding chamber 101 b). When the first brake pad 103 contacts the brake disc and the first elastic member 102c is compressed and contracted, the second slider 102b can slide outward gradually and eventually become misaligned with the inner port of the second oil delivery passage 101e and unblock the inner port of the second oil delivery passage 101 e.

With the above arrangement, when the driver starts to pedal the brake pedal, the brake fluid can first enter the first sliding chamber 101b and only drive the first brake pad 103 to squeeze the brake disc (since the inner port of the second oil delivery passage 101e is still blocked by the second slider 102b in the early process, the brake fluid cannot enter the second sliding chamber 201a-1 through the second oil delivery passage 101e, that is, the second brake pad 202 in the early stage of braking does not move and does not squeeze the brake disc); since only the first brake pad 103 presses the brake disc, the single-side friction is small, and the vehicle body can slowly brake and decelerate to provide a smooth transition process in the early stage.

When the driver continues to squeeze the brake pedal with force, the first brake pad 103 and the first sliding part 102a are restricted by the brake disc and cannot move continuously, so that the second sliding part 102b can gradually overcome the elastic force of the first elastic part 102c in an increasing hydraulic environment and continuously slide outwards until the second sliding part and the inner port of the second oil delivery channel 101e form dislocation, the inner port of the second oil delivery channel 101e is communicated so far, and therefore, the brake fluid in the first sliding cavity 101b at the moment can gradually enter the second sliding cavity 201a-1 at the later stage and drives the second brake pad 202 to synchronously squeeze the brake disc, and finally, the co-clamping effect of the brake pads on the two sides is realized, and the complete braking is realized.

In summary, in the braking process, the previous single-side friction braking can play a transitional retarding role so as to reduce the vehicle speed smoothly; when the vehicle body traveling speed is reduced to a certain degree, final parking can be achieved under the clasping of the double-side friction brakes. Therefore, the braking process is relatively stable, the action stroke of pedal pressing does not need to be strictly and uniformly controlled, and the stable speed reduction can be realized only by slowly stepping down in the whole process.

Of course, the invention can also realize emergency quick braking to adapt to the situation of needing emergency stop. When the brake pedal is pressed down forcibly and quickly, brake fluid in the master cylinder can rush into the first sliding cavity 101b quickly, and the first sliding piece 102a and the second sliding piece 102b can slide outwards quickly after being impacted by large hydraulic pressure, so that the inner port of the second oil delivery channel 101e can be opened quickly, namely, the first brake pad 103 and the second brake pad 202 can be clamped tightly quickly, and emergency braking parking is realized.

Further, the first slider 102a includes an outer end 102a-1 connected to the first brake pad 103, a socket 102a-2 fixed to an inner end of the outer end 102a-1, and a ring of retainer rings 102a-3 disposed on a periphery of the outer end 102 a-1. The insertion tube 102a-2 is a hollow tubular structure, and the limit ring 102a-3 is a ring-shaped raised structure.

A circle of accommodating groove 101b-1 is arranged at the outer port of the first sliding cavity 101b, one end of the second reset piece 102d is embedded in the accommodating groove 101b-1, and the other end of the second reset piece abuts against the outer side surface of the limiting ring 102a-3, and has a tendency of pressing the piston group 102 back to the first sliding cavity 101b integrally. The second restoring member 102d may be a compression spring, or may be a ring-shaped metal plate spring.

The outer diameter of the second slide 102b fits to the inner diameter of the first slide cavity 101 b. One end of the second sliding member 102b corresponding to the first sliding member 102a is provided with an annular groove 102b-1 corresponding to the socket barrel 102a-2, and the socket barrel 102a-2 can be inserted into the annular groove 102b-1 and can slide relatively. The first elastic member 102c is inserted into the annular groove 102b-1, and has one end abutting against the bottom surface of the annular groove 102b-1 and the other end abutting against the end of the insertion tube 102 a-2. The other end of the second sliding part 102b is provided with an inwards concave pressure groove 102b-2, the bottom surface of the pressure groove 102b-2 is preferably spherical, brake fluid entering the inner end of the first sliding cavity 101b can directly impact the pressure groove 102b-2, and the transmission effect of hydraulic drive is optimized.

Further, a third oil delivery passage 101f connected between the first oil delivery passage 101c and the second oil delivery passage 101e is further arranged inside the fixed seat 101, an accommodating cavity 101f-1 is formed in the third oil delivery passage 101f, and a ball 101g and a second elastic piece 101h are arranged in the accommodating cavity 101 f-1.

The outer diameter of the ball 101g is smaller than the accommodating cavity 101f-1 and larger than the third oil delivery passage 101 f; the second elastic element 101h is a compression spring, one end of which abuts against the ball 101g, and the other end of which abuts against one end of the accommodating cavity 101f-1 corresponding to the first oil delivery channel 101 c. Therefore, the ball 101g can be blocked at an end of the accommodation chamber 101f-1 corresponding to the second oil delivery passage 101e by the pressing of the second elastic member 101 h.

Therefore, when the brake master pump injects brake fluid into the first sliding chamber 101b, the brake fluid cannot be directly merged from the third oil delivery channel 101f into the second oil delivery channel 101e by the first oil delivery channel 101c, ensuring that the brake fluid can only enter the second oil delivery channel 101e through the first sliding chamber 101 b; meanwhile, when the brake is released and the brake fluid returns to the original position, the brake fluid in the second sliding chamber 201a-1 and the second oil delivery channel 101e can flush the ball 101g and enter the first oil delivery channel 101c through the third oil delivery channel 101f, thereby ensuring smooth return of the brake fluid.

Furthermore, annular sealing ring fixing grooves are formed in the inner side walls of the first sliding cavity 101b and the second sliding cavity 201a-1, and a sealing ring Q is arranged in each sealing ring fixing groove, so that the sealing effect of the structure is improved, and oil leakage is prevented.

Further, a guide strip 101i is arranged on the fixed seat 101; a guide groove 201c-1 matched with the guide strip 101i is formed in the inner side wall of the connecting plate 201c, and an embedding groove 201c-2 is formed in one end of the guide groove 201c-1 corresponding to the second outer edge portion 201 b; the guide bar 101i can be inserted into the guide slot 201c-1 from the insertion slot 201c-2 and can slide in the guide slot 201c-1 relatively, so as to ensure that the whole connecting frame 201 can move linearly relative to the fixed seat 101.

The length direction of the guide groove 201c-1 is consistent with the length direction of the connecting column 101d, and the cross-sectional profile of the guide strip 101i is a major arc, so that the width of the opening of the guide groove 201c-1 is smaller than the inner diameter of the inner side wall of the guide groove 201c-1, so as to ensure that the guide strip 101i cannot be laterally separated from the guide groove 201 c-1. The width of the notch of the insertion groove 201c-2 is not less than the inner diameter of the inner sidewall of the guide groove 201c-1 to ensure that the guide bar 101i can be inserted into the guide groove 201c-1 from the insertion groove 201 c-2.

Further, the second outer edge 201b is connected with the fixing seat 101 through a guide bolt 204; the guide bolt 204 has a bolt shaft with an outer end serving as a bolt head and an inner end serving as a threaded section with external threads. A screw hole 101j matched with the screw rod section is formed in the outer end face of the fixed seat 101; the second outer edge 201b is provided with a through hole 201b-1 matched with the outer diameter of the bolt rod; the guide bolt 204 passes through the through hole 201b-1 and is fixedly connected with the screw hole 101j through a screw section at the end thereof. Therefore, the guide bolt 204 can provide an auxiliary guiding function for the sliding of the connecting frame 201, and can also define the initial position of the connecting frame 201 (i.e. the initial distance of the second brake pad 202 relative to the brake disc) by the bolt head.

The first reset piece 203 is sleeved on the periphery of the screw section, one end of the first reset piece abuts against the inner side surface of the second outer edge 201b, and the other end abuts against the outer end surface of the fixed seat 101.

Further, a first brake pad 103 is detachably mounted to an outer end of the first slider 102 a; the second brake pad 202 is detachably mounted inside the second outer edge portion 201 b; the first brake pad 103 or the second brake pad 202 of the present invention may be detachably attached by bolts.

The first brake pad 103 and the second brake pad 202 are identical and symmetrical in structure, and both include a backing plate Z-1 and a plurality of friction plates Z-2 detachably arranged and fixed to the backing plate Z-1. Preferably, each friction plate Z-2 is fixed on the bottom plate Z-1 through a countersunk screw, and the outer end of the screw is lower than the outer side surface of the friction plate Z-2 in height. Based on the above, when the friction plate Z-2 of the invention has non-abrasion local damage, the whole friction plate Z-2 does not need to be replaced, but only the friction plate Z-2 corresponding to the damaged part needs to be replaced by blocks, thereby saving materials.

Further, at least two sets of piston sets 102 are arranged inside the fixed seat 101, and a first sliding cavity 101b, a first oil delivery passage 101c, a second oil delivery passage 101e, a third oil delivery passage 101f and the like which are matched with each piston set 102 are arranged inside the fixed seat 101; a connecting column 101d corresponding to each second oil delivery channel 101e is arranged on the outer side of the fixed seat 101; and the first outer edge portion 201a is also provided with a second sliding chamber 201a-1 fitted to each connecting column 101 d.

The outer ends of the piston groups 102 are uniformly connected with the first brake pads 103, and the first oil delivery channels 101c are gathered in one way in the fixing seat 101 and are simultaneously communicated with the same oil port 101a, so that uniform supply of the multiple first oil delivery channels 101c is realized.

Furthermore, the connecting plate 201c is provided with a through window 201c-3, so that the abrasion condition of the friction plate Z-2 positioned inside can be observed conveniently.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A truck brake characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the first clamping assembly (100) comprises a fixed seat (101) fixed on a truck suspension, a piston group (102) arranged in the fixed seat (101) in a sliding mode and with one end extending outwards, and a first brake pad (103) fixed at the outer end of the piston group (102); an oil port (101 a) is formed in the outer portion of the fixed seat (101), a first sliding cavity (101 b) matched with the piston group (102) and a first oil delivery channel (101 c) communicated with the oil port (101 a) and the first sliding cavity (101 b) are formed in the fixed seat (101);

the second clamping assembly (200) comprises a connecting frame (201) connected with the fixed seat (101) and a second brake pad (202) fixed on the inner side of the connecting frame (201); the second brake pad (202) and the first brake pad (103) are opposite to each other, and an interlayer space exists;

a connecting column (101 d) is arranged on the other side, opposite to the first brake pad (103), of the fixed seat (101), and a second oil delivery channel (101 e) extending to the first sliding cavity (101 b) is arranged inside the connecting column (101 d);

the connecting frame (201) comprises a first outer edge part (201 a), a second outer edge part (201 b) and a connecting plate (201 c) connected between the first outer edge part and the second outer edge part; a second sliding cavity (201 a-1) matched with the connecting column (101 d) is arranged on the first outer edge part (201 a), and the connecting column (101 d) is inserted into the second sliding cavity (201 a-1); the second brake pad (202) is fixed on the inner side of the second outer edge part (201 b), and a first reset piece (203) is arranged between the second outer edge part (201 b) and the fixed seat (101);

the piston group (102) comprises a first slide (102 a), a second slide (102 b) and a first elastic piece (102 c) connected between the two; the first sliding piece (102 a) is positioned at the outer end of the second sliding piece (102 b) and at least partially extends out of the first sliding cavity (101 b); a second reset piece (102 d) is arranged between the first sliding piece (102 a) and the outer port of the first sliding cavity (101 b);

when the first elastic piece (102 c) is in a natural state, the second sliding piece (102 b) can block the inner port of the second oil delivery passage (101 e);

when the first brake pad (103) contacts a brake disc and the first elastic member (102 c) is compressed and shortened, the second sliding member (102 b) can be dislocated from the inner port of the second oil delivery passage (101 e) and unblocked.

2. The truck brake of claim 1, wherein: the first sliding piece (102 a) comprises an outer end head (102 a-1) connected with the first brake pad (103), a plug-in barrel (102 a-2) fixed on the inner end of the outer end head (102 a-1), and a ring of limiting rings (102 a-3) arranged on the periphery of the outer end head (102 a-1); an accommodating groove (101 b-1) is formed in the outer port of the first sliding cavity (101 b), one end of the second resetting piece (102 d) is embedded into the accommodating groove (101 b-1), and the other end of the second resetting piece abuts against the outer side face of the limiting ring (102 a-3);

one end of the second sliding piece (102 b) corresponding to the first sliding piece (102 a) is provided with an annular groove (102 b-1) corresponding to the plug-in cylinder (102 a-2), and the other end of the second sliding piece (102 b) is provided with a concave pressure groove (102 b-2).

3. The truck brake of claim 2, wherein: a third oil delivery channel (101 f) connected between the first oil delivery channel (101 c) and the second oil delivery channel (101 e) is further arranged inside the fixed seat (101), an accommodating cavity (101 f-1) is formed in the third oil delivery channel (101 f), and a sphere (101 g) and a second elastic piece (101 h) are arranged in the accommodating cavity (101 f-1);

the outer diameter of the ball body (101 g) is smaller than the accommodating cavity (101 f-1) and larger than the third oil delivery channel (101 f), one end of the second elastic piece (101 h) abuts against the ball body (101 g), and the other end of the second elastic piece abuts against one end, corresponding to the first oil delivery channel (101 c), of the accommodating cavity (101 f-1).

4. The truck brake of claim 1 or 2, characterized in that: and sealing ring fixing grooves are formed in the inner side walls of the first sliding cavity (101 b) and the second sliding cavity (201 a-1), and a sealing ring (Q) is arranged in each sealing ring fixing groove.

5. The truck brake of claim 3, wherein: a guide strip (101 i) is arranged on the fixed seat (101); a guide groove (201 c-1) matched with the guide strip (101 i) is formed in the inner side wall of the connecting plate (201 c), and an embedding groove (201 c-2) is formed in one end, corresponding to the second outer edge portion (201 b), of the guide groove (201 c-1); the guide bar (101 i) can be inserted into the guide groove (201 c-1) from the insertion groove (201 c-2) and can relatively slide in the guide groove (201 c-1);

the length direction of the guide groove (201 c-1) is consistent with the length direction of the connecting column (101 d).

6. The truck brake of any of claims 1, 2, 5, wherein: the second outer edge part (201 b) is connected with the fixed seat (101) through a guide bolt (204);

the tail end of a bolt rod of the guide bolt (204) is provided with a screw rod section, and a screw hole (101 j) matched with the screw rod section is formed in the outer end face of the fixed seat (101); a through hole (201 b-1) matched with the outer diameter of the bolt rod is arranged on the second outer edge part (201 b); the guide bolt (204) penetrates through the through hole (201 b-1) and is fixedly connected with the screw hole (101 j) through a screw rod section at the tail end of the guide bolt;

the first reset piece (203) is sleeved on the periphery of the screw rod section, one end of the first reset piece abuts against the inner side face of the second outer edge portion (201 b), and the other end of the first reset piece abuts against the outer end face of the fixed seat (101).

7. The truck brake of claim 6, wherein: the first brake pad (103) is detachably mounted at an outer end of the first slider (102 a); the second brake pad (202) is detachably mounted on the inner side of the second outer edge portion (201 b);

the first brake pad (103) and the second brake pad (202) are identical and symmetrical in structure, and both comprise a bottom plate (Z-1) and a plurality of friction plates (Z-2) which are detachably arranged and fixed on the bottom plate (Z-1).

8. The truck brake of claim 5, wherein: at least two groups of piston groups (102) are arranged in the fixed seat (101), and a first sliding cavity (101 b), a first oil delivery channel (101 c), a second oil delivery channel (101 e) and a third oil delivery channel (101 f) which are matched with each piston group (102) are arranged in the fixed seat (101);

the outer end of each piston group (102) is uniformly connected with the first brake pad (103), and each first oil delivery channel (101 c) is gathered in one way in the fixed seat (101) and is simultaneously communicated with the oil port (101 a).