阅读说明：本技术 一种汽车盘式制动器 (Automobile disc brake ) 是由 张伟 于 2020-07-09 设计创作，主要内容包括：本发明公开了一种汽车盘式制动器,涉及汽车制动技术领域,解决了现有技术中汽车制动器的回位量不易控制的问题,其技术要点是：包括制动钳体,制动钳体上设有活塞孔和勾爪,活塞孔内设有第一活塞,制动钳体在设有推杆组件在制动钳体的外侧连接有扭转组件,扭转组件包括固定到扭杆上的扭块,扭块通过弧形活塞杆连接有第二活塞,第二活塞设在弧形液压腔内,且弧形活塞杆在弧形液压腔内套设有弧形弹簧,弧形液压腔在第二活塞远离弧形活塞杆的一侧设有进油口；本发明中活塞回位量可控,能够通过计算控制活塞回位量和制动盘玉摩擦片的盘面间隙,而且本发明活塞回位量控制精准。(The invention discloses an automobile disc brake, which relates to the technical field of automobile braking and solves the problem that the return quantity of an automobile brake in the prior art is difficult to control, and the technical key points are as follows: the brake caliper comprises a brake caliper body, wherein a piston hole and a hook claw are arranged on the brake caliper body, a first piston is arranged in the piston hole, a torsion assembly is connected to the brake caliper body on the outer side of the brake caliper body through a push rod assembly, the torsion assembly comprises a torsion block fixed to a torsion rod, the torsion block is connected with a second piston through an arc-shaped piston rod, the second piston is arranged in an arc-shaped hydraulic cavity, an arc-shaped spring is sleeved on the arc-shaped piston rod in the arc-shaped hydraulic cavity, and an oil inlet is formed in one side, away from the arc-shaped piston rod; the piston return amount is controllable, the piston return amount and the disc surface gap of the brake disc jade friction plate can be controlled through calculation, and the piston return amount is controlled accurately.)

1. An automobile disc brake comprises a brake caliper body (1), the brake caliper body (1) is connected with a support (2) through a guide pin, the support (2) is connected with a friction plate (3) through a friction plate snap spring, a brake disc (4) is arranged between the friction plate (3) and the friction plate (3), the brake caliper body (1) is respectively provided with a piston hole (11) and a hook claw (12) at two sides of the friction plate (3), a first piston (5) is arranged in the piston hole (11), the automobile disc brake is characterized in that the brake caliper body (1) is provided with an arc-shaped hydraulic cavity (13) at the outer side of one end provided with the piston hole (11), the first piston (5) is connected with a push rod assembly (6) in the piston hole (11), the push rod assembly (6) comprises a first push rod (61) arranged in the first piston (5), the first push rod (61) is connected with a second push rod (62) capable of pushing the first push rod (61) to move along, a limiting plate (64) for preventing the second push rod (62) from rotating is sleeved on the outer side of the second push rod (62), the second push rod (62) is further connected with a torsion bar (63) penetrating through the bottom of the piston hole (11), at least two groups of arc-shaped grooves are uniformly distributed on the surface, contacting with the torsion bar (63), of the second push rod (62) along the axis of the second push rod (62), the depths of the arc-shaped grooves are sequentially reduced from one end to the other end, at least two groups of semi-circular grooves are uniformly distributed on the surface, contacting with the second push rod (62), of the torsion bar (63) along the axis of the torsion bar (63), steel balls are arranged in the semi-circular grooves and are further arranged in the arc-shaped grooves, a first pressure spring is further arranged on one side, far away from the first push rod (61), of the limiting plate (64) of the second push rod (62), the torsion bar (63) is connected with a torsion assembly (7) on the outer side of the, the twisting block (73) is connected with a second piston (71) through an arc piston rod (72), the second piston (71) is arranged in an arc hydraulic cavity (13), an arc spring is sleeved on the arc piston rod (72) in the arc hydraulic cavity (13), and an oil inlet is formed in one side, far away from the arc piston rod (72), of the arc hydraulic cavity (13) in the second piston (71).

2. The disc brake for the automobile as recited in claim 1, characterized in that a step is provided in the piston hole (11), the limit plate (64) is fixed in the step on the piston hole (11) by a spring collar, and a limit post is provided at a position where the piston hole (11) contacts with the end surface of the limit plate (64), and a limit hole is provided on the limit plate (64), and the limit post is provided in the limit hole.

3. The automobile disc brake of claim 1, characterized in that an opening is formed in one side of the arc-shaped hydraulic cavity (13) far away from the brake caliper body (1), a hydraulic cavity cover plate (14) is mounted at the opening of the arc-shaped hydraulic cavity (13) through a screw, a sealing gasket is arranged between the arc-shaped hydraulic cavity (13) and the hydraulic cavity cover plate (14), and the oil inlet is formed in the hydraulic cavity cover plate (14).

4. The vehicle disc brake of claim 1, characterized in that the caliper body (1) is further provided with a stop (15) on a side adjacent to the torsion block (73).

5. The automotive disc brake of claim 1, characterized in that a first baffle plate is arranged at one end of the first push rod (61) contacting with the first piston (5), a counter bore is arranged at the axis of the first piston (5), and the first push rod (61) is fixed in the counter bore through a spring retainer ring; the first push rod (61) is connected with the second push rod (62) through threads, internal threads are arranged in the second push rod (62), a second baffle plate is arranged at one end, far away from the first push rod (61), of the second push rod (62), and the arc-shaped groove is formed in one surface, far away from the first push rod (61), of the second baffle plate; the one end of torsion bar (63) is equipped with the third baffle, and torsion bar (63) is equipped with the external screw thread in the one end of keeping away from the third baffle, and the position that is close to the external screw thread on torsion bar (63) is equipped with the spline, turns round piece (73) and is square piece, turns round and is equipped with the splined hole on piece (73), turns round piece (73) cover and is equipped with smooth circle axle on torsion bar (63), between spline and the third baffle.

6. The vehicle disc brake of any one of claims 1 to 5, characterized in that the caliper body (1) is further provided with a spacing adjustment assembly (8), the spacing adjustment assembly (8) comprises a distance sensor (81), the distance sensor (81) is fixedly connected to the friction plate (3) on the side of the brake disc (4) close to the first piston (5), the spacing adjustment assembly (8) is provided with an adjustment motor (83) in a counter bore of the first piston (5), and an output shaft of the adjustment motor (83) is fixedly connected to the first push rod (61).

7. The vehicle disc brake of claim 6, characterized in that the distance sensor (81) is externally sleeved with a heat insulation pipe (82), the heat insulation pipe (82) is fixedly connected with the friction plate (3), and the first piston (5) is provided with an avoiding hole at a position close to the friction plate (3).

Technical Field

The invention relates to the technical field of automobile braking, in particular to an automobile disc brake.

Background

The brake is an important device of the automobile, so that the outside exerts certain force on the automobile wheels to perform forced braking on the wheels to a certain degree, wherein the disc brake realizes braking by means of friction force between discs.

At present, the power of dragging when the piston cylinder return in the disc brake relies on the rectangle sealing washer reconversion, and the return volume of piston cylinder is controlled by the deflection of rectangle sealing washer, the return volume of piston cylinder is influencing the stopper and is needing the liquid measure, when the return volume of piston cylinder is little, make friction disc contact brake disc easily, thereby make friction disc abnormal wear, make the friction disc life-span reduce, and when the return volume is big, it is big to make easily to need the liquid measure, can appear the tired soft problem that does not brake with first foot of braking, therefore, the return volume of piston cylinder is the key parameter in the stopper research.

Chinese patent publication No. CN201149055Y discloses a floating caliper hydraulic disc brake of a non-self-locking threaded transmission belt parking mechanism, which has the structure: from right to left, the inhaul cable support assembly, the rotating pin assembly, the roller pin, the ejector rod assembly, the compression spring assembly, the ejector rod seat assembly, the piston, the support assembly, the inner brake pad assembly, the brake disc, the outer brake pad assembly and the brake caliper are connected in sequence. The utility model discloses can integrate the stopper of line, parking two kinds of functions, place parking mechanism in braking pincers ingeniously, do not influence service brake, also need not extra installation space simultaneously, be convenient for install on various passenger vehicles, make the assumption that front and back and parking all adopt disc brake realize; the brake is suitable for brakes of all passenger vehicles. The brake adopts the rectangular ring to control the return amount of the piston cylinder, but the dimensional tolerance and the formula of the rectangular ring in the prior art are obtained through experience, and no known formula is used for calculating the return amount of the piston in the prior art, so that the return amount of the automobile brake is not easy to control, and therefore, the automobile disc brake is provided.

Disclosure of Invention

The invention aims to solve the technical problem of providing an automobile disc brake to solve the problem that the return amount of the automobile brake in the prior art is difficult to control.

In order to achieve the purpose, the invention provides the following technical scheme:

a disc brake for car is composed of a brake caliper body with a supporter connected to the supporter via guide pin, a friction plate linked to said supporter via clamp spring, a brake disc between said friction plate and friction plate, a piston hole with a first piston in it, and an arc hydraulic cavity outside the end of said brake caliper body with piston hole, a push rod assembly in said piston hole and consisting of a first push rod in said first piston and a second push rod able to push said first push rod along the axis of piston hole, a limiting plate for preventing said second push rod from rotating, a torsion bar passing through the bottom of piston hole, and at least two arc slots uniformly arranged on the surface of said second push rod in contact with said torsion bar, the depth of the arc-shaped groove is reduced from one end to the other end in sequence, at least two groups of semi-circular grooves are uniformly distributed around the axis of the torsion bar on one side of the torsion bar in contact with the second push rod, steel balls are arranged in the semi-circular grooves, the steel balls are further arranged in the arc-shaped groove, a first pressure spring is further arranged on one side, away from the first push rod, of the second push rod at the limiting plate, the torsion bar is connected with a torsion assembly on the outer side of the braking clamp body, the torsion assembly comprises a torsion block fixed on the torsion bar, the torsion block is connected with a second piston through an arc-shaped piston rod, the second piston is arranged in an arc-shaped hydraulic cavity, an arc-shaped spring is sleeved on the arc-.

According to a further scheme of the invention, a step is arranged in the piston hole, the limiting plate is fixed in the step on the piston hole through the spring retainer ring, a limiting column is arranged at the position where the piston hole is in contact with the end face of the limiting plate, a limiting hole is arranged on the limiting plate, and the limiting column is arranged in the limiting hole.

As a further scheme of the brake caliper, an opening is formed in one surface, far away from the brake caliper body, of the arc-shaped hydraulic cavity, a hydraulic cavity cover plate is installed at the opening of the arc-shaped hydraulic cavity through screws, a sealing gasket is arranged between the arc-shaped hydraulic cavity and the hydraulic cavity cover plate, and the oil inlet is formed in the hydraulic cavity cover plate.

As a further proposal of the invention, the brake caliper body is also provided with a stop block on one surface close to the twisting block.

As a further scheme of the invention, a first baffle is arranged at one end of the first push rod, which is in contact with the first piston, a counter bore is arranged at the axis of the first piston, and the first push rod is fixed in the counter bore through a spring retainer ring; the first push rod is connected with the second push rod through threads, internal threads are arranged in the second push rod, a second baffle is arranged at one end, far away from the first push rod, of the second push rod, and the arc-shaped groove is formed in one surface, far away from the first push rod, of the second baffle; the one end of torsion bar is equipped with the third baffle, and the torsion bar is equipped with the external screw thread in the one end of keeping away from the third baffle, and the position that is close to the external screw thread on the torsion bar is equipped with the spline, turns round the piece and is square piece, turns round and is equipped with the splined hole on the piece, turns round the piece cover and is equipped with on the torsion bar, is equipped with smooth circle axle between spline and the third baffle.

As a further scheme of the invention, the brake caliper body is also provided with a spacing adjusting assembly, the spacing adjusting assembly comprises a distance sensor, the distance sensor is fixedly connected to a friction plate on one side of the brake disc close to the first piston, the spacing adjusting assembly is provided with an adjusting motor in a counter bore of the first piston, and an output shaft of the adjusting motor is fixedly connected to the first push rod.

As a further scheme of the invention, a heat insulation pipe is sleeved outside the distance sensor, the heat insulation pipe is fixedly connected with the friction plate, and the first piston is provided with an avoidance hole at a position close to the friction plate.

In conclusion, compared with the prior art, the invention has the following beneficial effects:

1. the invention has the advantages of small liquid demand and stable liquid demand, and can reduce the radius of the brake master cylinder, thereby reducing the cost of the brake master cylinder.

2. The piston return amount is controllable, the piston return amount and the disc surface gap of the brake disc jade friction plate can be controlled through calculation, and the piston return amount is controlled accurately.

3. The invention can automatically adjust the disc surface clearance and adjust the disc surface clearance according to the use requirement, thereby improving the differentiation of the brake and leading the brake to be suitable for various road conditions.

Drawings

Fig. 1 is a schematic structural view of an automotive disc brake.

Fig. 2 is a cross-sectional view of M-M in fig. 1.

Fig. 3 is a view from direction a of fig. 1.

Fig. 4 is a schematic structural diagram of a second push rod in the automobile disc brake.

Fig. 5 is a schematic structural view of a torsion bar in an automotive disc brake.

Reference numerals: 1-a brake caliper body, 11-a piston hole, 12-a hook claw, 13-an arc-shaped hydraulic cavity, 14-a hydraulic cavity cover plate, 15-a stop block, 2-a support, 3-a friction plate, 4-a brake disc, 5-a first piston, 6-a push rod component, 61-a first push rod, 62-a second push rod, 63-a torsion rod, 64-a limiting plate, 7-a torsion component, 71-a second piston, 72-an arc-shaped piston rod, 73-a torsion block, 8-a distance adjusting component, 81-a distance sensor, 82-a heat insulation pipe and 83-an adjusting motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.