Novel wedge-shaped brake pressure plate assembly

Abstract

The utility model relates to the technical field of vehicle brake systems, and discloses a novel wedge-shaped brake pressure plate assembly which comprises an upper brake pressure plate, a lower brake pressure plate and a wedge-shaped pull rod, the upper brake pressure plate and the lower brake pressure plate are detachably connected, one side of the upper brake pressure plate is integrally provided with a first transmission head, one side of the lower brake pressure plate is integrally provided with a second transmission head, and the wedge-shaped pull rod is connected with the first transmission head. The first transmission head and the second transmission head are arc-shaped transmission heads and are oppositely arranged, a wedge-shaped pull head is arranged at one end of the wedge-shaped pull rod, and the wedge-shaped pull head is located in a space formed by the first transmission head and the second transmission head. The overall structure integration degree is increased, the transmission efficiency is improved, the braking response time is shortened, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle brake system technical field, concretely is a new type wedge brake pressure plate assembly. BACKGROUND

[0002] As the key braking device in the field of engineering machinery, heavy vehicles and the like, the core of the wet brake realizes the transmission of braking force by axially extruding the friction plate through the pressure plate. The traditional wet brake generally adopts a connecting rod transmission type pressure plate assembly, which typically includes three core features: 1: double-pressure-plate connecting rod linkage structure, which indirectly drives the upper and lower pressure plates to rotate relative to each other by driving a multi-stage connecting rod mechanism through an external pull rod; 2: spiral track steel ball transmission mechanism, which processes a water drop-shaped ball socket at a specific position of the pressure plate and configures a steel ball, and realizes the spiral advancing axial displacement of the pressure plate by rolling the steel ball along the spiral track; 3: groove spring reset system, which sets a hook groove on the inner wall of the pressure plate and realizes the reset of the pressure plate after braking is released through a tension spring. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a new type wedge brake pressure plate assembly to solve the problems of long response time, effective transmission power loss and high maintenance cost caused by insufficient integration of the traditional connecting rod transmission type pressure plate assembly.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a new type wedge brake pressure plate assembly, comprising an upper brake pressure plate, a lower brake pressure plate and a wedge-shaped pull rod, the upper brake pressure plate and the lower brake pressure plate are hollow annular pressure plates, the upper brake pressure plate is arranged directly above the lower brake pressure plate, and the upper brake pressure plate and the lower brake pressure plate are detachably connected;

[0005] A first transmission head is integrally arranged on one side of the upper brake pressure plate, a plurality of first elliptical raceways are arranged on the bottom of the upper brake pressure plate, a second transmission head is integrally arranged on one side of the lower brake pressure plate, a plurality of second elliptical raceways are arranged on the top of the lower brake pressure plate corresponding to the first elliptical raceways, and a steel ball is arranged in the space formed by the first elliptical raceway and the second elliptical raceway at the same position;

[0006] The first transmission head is a transmission head that is offset downward as a whole, the second transmission head is a transmission head that is offset upward as a whole, the first transmission head and the second transmission head are uniform circular arc transmission heads, and the first transmission head and the second transmission head are arranged opposite to each other;

[0007] An integral first limiting block is arranged on the other side of the upper brake pressing disc; an integral second limiting block is arranged on the other side of the lower brake pressing disc; the first limiting block and the second limiting block are circular arc-shaped and oppositely arranged; a limiting rod is arranged in the space formed between the first limiting block and the second limiting block.

[0008] The wedge-shaped pull rod is provided with a wedge-shaped pull head at one end, and the wedge-shaped pull head is arranged in the space formed by the first transmission head and the second transmission head.

[0009] Preferably, the wedge-shaped pull head is recessed circular arc-shaped at the end away from the wedge-shaped pull rod, and is matched with the arc-shaped side surfaces of the upper brake pressing disc and the lower brake pressing disc.

[0010] The two sides of the wedge-shaped pull head are recessed circular arc-shaped surfaces, and the two circular arc-shaped surfaces are in contact with the first transmission head and the second transmission head respectively.

[0011] Preferably, a plurality of first claws are arranged on the inner wall of the upper brake pressing disc, and a plurality of second claws corresponding to the first claws are arranged on the inner wall of the lower brake pressing disc; the first claws are provided with claw grooves opening upward, the second claws are provided with claw grooves opening downward, and the first claws and the second claws at the same positions are connected by springs.

[0012] Preferably, the upper surface of the upper brake pressing disc and the lower surface of the lower brake pressing disc are sprayed with a tungsten carbide wear-resistant coating.

[0013] Compared with the prior art, the utility model provides has the following beneficial effects:

[0014] The multi-stage connecting rod transmission mechanism is cancelled, the wedge-shaped pull rod is directly used for driving the pressing disc, the energy loss of the intermediate link is eliminated, a more efficient power transmission path is realized, the movement components of the whole machine are reduced, the maintenance cost is reduced, the improved transmission structure shortens the brake action transmission path, the response sensitivity is improved, and the utility model is especially suitable for high-frequency and high-strength brake working conditions; the design of the tungsten carbide wear-resistant coating increases the wear resistance and stabilizes the friction coefficient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is a structure explosion schematic diagram of the utility model;

[0017] Figure 3 It is a structure explosion bottom view of the utility model;

[0018] Figure 4 It is a structure schematic diagram of the wedge-shaped pull rod 3 of the utility model.

[0019] Wherein: 1, the upper brake pad; 101, the first transmission head; 102, the first oval raceway; 103, the first hook; 2, the lower brake pad; 201, the second transmission head; 202, the second oval raceway; 203, the second hook; 3, the wedge-shaped pull rod; 301, the wedge-shaped pull head; 4, the spring; 5, the steel ball; 6, the first limit block; 7, the second limit block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figure 1 Figure 4 The utility model provides a technical scheme: including upper brake pad 1, lower brake pad 2 and wedge-shaped pull rod 3, upper brake pad 1 and lower brake pad 2 are hollow annular pad, upper brake pad 1 sets up in the upside of lower brake pad 2, and upper brake pad 1 and lower brake pad 2 are detachable connection;

[0022] One side of upper brake pad 1 is integrally provided with the first transmission head 101, and the bottom of the upper brake pad 1 is provided with a plurality of first oval raceways 102. One side of the lower brake pad 2 is integrally provided with the second transmission head 201, and the top of the lower brake pad 2 is provided with a plurality of second oval raceways 202 corresponding to the first oval raceways 102. The space formed by the first oval raceways 102 and the second oval raceways 202 at the same position is provided with the steel ball 5.

[0023] The first transmission head 101 is a transmission head that is offset downward as a whole, and the second transmission head 201 is a transmission head that is offset upward as a whole. The first transmission head 101 and the second transmission head 201 are both circular arc-shaped transmission heads, and the first transmission head 101 is arranged opposite to the second transmission head 201.

[0024] The wedge-shaped pull rod 3 is provided with the wedge-shaped pull head 301 at one end, and the wedge-shaped pull head 301 is located in the space formed by the first transmission head 101 and the second transmission head 201.

[0025] Through the above technical scheme, the multi-stage connecting rod structure is cancelled, the wedge-shaped pull rod 3 is directly wedge-shaped driven with the first transmission head 101 and the second transmission head 201, the single-stage force transmission path of "pull rod-transmission head" is established, the friction loss of the traditional connecting rod hinge point is eliminated, the transmission efficiency is improved, the brake response time is shortened, and the brake delay phenomenon is effectively avoided.

[0026] ​The utility model provides a technical scheme: one side of upper brake pressure plate 1 is integrally provided with first limit block 6; the other side of lower brake pressure plate 2 is integrally provided with second limit block 7, first limit block 6 and second limit block 7 are circular arc and oppositely arranged, and a space formed in the middle of first limit block 6 and second limit block 7 is provided with a limiting rod;

[0027] Through the above technical scheme, when the pressure plate rotates, the first limit block 6 and the second limit block 7 contact and interfere with the limiting rod, thereby accurately restricting the maximum rotation angle of the pressure plate.

[0028] The utility model provides a technical scheme: the one end of wedge-shaped pull head 301 away from wedge-shaped pull rod 3 is concave circular arc, and is matched with the arc side surface of upper brake pressure plate 1 and lower brake pressure plate 2;

[0029] The two sides of wedge-shaped pull head 301 are concave circular arc surfaces, and the two circular arc surfaces contact the first transmission head 101 and the second transmission head 201 respectively;

[0030] Through the above technical scheme, the two concave circular arc surfaces of the wedge-shaped pull head 301 are fully wrapped with the arc side surfaces of the first transmission head 101 and the second transmission head 201, which significantly reduces the unit pressure of the contact surface, avoids surface wear caused by local stress concentration, and also ensures that the first transmission head 101 and the second transmission head 201 are synchronously and accurately displaced when the wedge-shaped pull rod 3 is actuated, thereby eliminating the risk of motion interference.

[0031] The utility model provides a technical scheme: a plurality of first claws 103 are arranged on the inner wall of the upper brake pressure plate 1, a plurality of second claws 203 are arranged on the inner wall of the lower brake pressure plate 2 and correspond to the first claws 103, the first claws 103 are provided with upwardly-opened claw grooves, the second claws 203 are provided with downwardly-opened claw grooves, and the first claws 103 and the second claws 203 at the same positions are connected by springs 4;

[0032] Through the above technical scheme, a plurality of claw-spring units are evenly distributed along the circumference of the pressure plate, forming a closed-loop elastic support system, which effectively offsets the radial deformation of the pressure plate and maintains the uniformity of the pressure on the friction plate contact surface. The symmetrically-opposed slot design of the first claws 103 and the second claws 203, combined with the bidirectional elastic constraint of the springs 4, ensures that the pressure plate is quickly returned when the brake is released, and simultaneously avoids axial deviation during the resetting process.

[0033] The utility model provides a technical scheme: the upper surface of the upper brake pressure plate 1 and the lower surface of the lower brake pressure plate 2 are sprayed with a tungsten carbide wear-resistant coating;

[0034] Through the above technical scheme, the tungsten carbide coating forms a high-strength protective layer on the friction surface of the pressure plate, significantly improves the surface wear resistance, and effectively resists abrasive wear and adhesive wear caused by long-term extrusion and sliding of the friction plate.

[0035] The utility model provides a technical scheme: wedge pull rod 3 adopts 42CrMo alloy steel after forging and processes, through heat treatment process, the hardness reaches HRC50-55, brake pressure plate is QT500-7 cast, transmission head arc head high frequency quenching;

[0036] Through the above technical scheme, wedge pull rod 3 has high strength and impact resistance, transmission head is treated through high frequency quenching and improves surface hardness, and the life of assembly is greatly improved.

[0037] Working principle: when braking, external driving force acts on wedge pull rod 3, drives wedge pull head 301 to move along the wedge-shaped space formed by first transmission head 101 and second transmission head 201, and through the rolling contact of the two side arc surfaces of pull head 301 and transmission head, converts the horizontal pulling force into the synchronous reverse rotary driving force of upper brake pressure plate 1 and lower brake pressure plate 2, when the pressure plate rotates, steel ball 5 rolls along first elliptical raceway 102 and second elliptical raceway 202, converts the rotary motion into axial displacement, pushes upper brake pressure plate 1 and lower brake pressure plate 2 to the direction of the friction plate of the upper surface of upper brake pressure plate 1 and the lower surface of lower brake pressure plate 2, and realizes brake contact. The first limiting block 6 of upper brake pressure plate 1 and the second limiting block 7 of lower brake pressure plate 2 are in arc structure, and are oppositely arranged to form an annular limiting space. The limiting rod longitudinally penetrates the space, and through the contact interference of first limiting block 6 and second limiting block 7 and limiting rod when the pressure plate rotates, the maximum rotation angle of the pressure plate is accurately constrained. Spring 4 connects first hook 103 and second hook 203, and when the brake is removed, the upper brake pressure plate 1 and the lower brake pressure plate 2 are reset through the elastic back-pulling action.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A novel wedge-shaped brake pressure plate assembly, characterized in that: It includes an upper brake pressure plate (1), a lower brake pressure plate (2) and a wedge-shaped tie rod (3). The upper brake pressure plate (1) and the lower brake pressure plate (2) are hollow annular pressure plates. The upper brake pressure plate (1) is located directly above the lower brake pressure plate (2). The upper brake pressure plate (1) and the lower brake pressure plate (2) are detachably connected. The upper brake pressure plate (1) is integrally provided with a first transmission head (101) on one side, and the bottom of the upper brake pressure plate (1) is provided with multiple first elliptical raceways (102). The lower brake pressure plate (2) is integrally provided with a second transmission head (201) on one side, and the top of the lower brake pressure plate (2) is provided with multiple second elliptical raceways (202) corresponding to the first elliptical raceways (102). A steel ball (5) is provided in the space formed by the first elliptical raceways (102) and the second elliptical raceways (202) at the same position. The first transmission head (101) is a transmission head that is offset downward as a whole, and the second transmission head (201) is a transmission head that is offset upward as a whole. The first transmission head (101) and the second transmission head (201) are both arc-shaped transmission heads, and the first transmission head (101) and the second transmission head (201) are arranged opposite to each other. The upper brake pressure plate (1) is integrally provided with a first limiting block (6) on the other side; the lower brake pressure plate (2) is integrally provided with a second limiting block (7) on the other side. The first limiting block (6) and the second limiting block (7) are arc-shaped and arranged opposite to each other. A limiting rod is provided in the space formed between the first limiting block (6) and the second limiting block (7). The wedge-shaped pull rod (3) has a wedge-shaped pull head (301) at one end, and the wedge-shaped pull head (301) is located in the space formed by the first transmission head (101) and the second transmission head (201).

2. The novel wedge-shaped brake pressure plate assembly according to claim 1, characterized in that: The end of the wedge-shaped pull head (301) away from the wedge-shaped pull rod (3) is a concave arc shape, which matches the arc-shaped side surface of the upper brake pressure plate (1) and the lower brake pressure plate (2); The wedge-shaped pull head (301) has concave arc-shaped surfaces on both sides, and the two arc-shaped surfaces contact the first transmission head (101) and the second transmission head (201) respectively.

3. The novel wedge-shaped brake pressure plate assembly according to claim 1, characterized in that: The upper brake pressure plate (1) has multiple first hooks (103) on its inner wall, and the lower brake pressure plate (2) has multiple second hooks (203) on its inner wall corresponding to the first hooks (103). The first hooks (103) have upward-opening hook grooves, and the second hooks (203) have downward-opening hook grooves. The spring (4) connects the first hooks (103) and the second hooks (203) at the same position.

4. A novel wedge-shaped brake pressure plate assembly according to any one of claims 1-3, characterized in that: The upper surface of the upper brake disc (1) and the lower surface of the lower brake disc (2) are coated with a tungsten carbide wear-resistant coating.

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