A double-acting motor disc brake device

Abstract

The present invention discloses a dual-acting motor disc brake device, comprising a drive module, a transmission module, and an execution module; the drive module is composed of a motor, a bevel gear, and a housing; the torque output by the motor changes its direction through the bevel gear and is transmitted to the transmission module; the transmission module is composed of gears, a transmission shaft, and bearings, and is used to increase the torque and transmit the torque to the execution module; the execution module is composed of a threaded rod, a brake pad, and a bearing; the left and right sides of the threaded rod have opposite threads, and the torque drives the threaded rod to rotate and drive the two brake pads to move toward each other, squeezing the brake disc to complete the braking action. The present invention uses a single motor to achieve the simultaneous movement of the brake pads on both sides toward each other, and avoids deformation caused by squeezing the brake pads.

Description

Technical Field

[0001] The present invention relates to a disc brake, in particular to a double-acting disc brake driven by a single motor Background Art

[0002] Disc brakes are a widely used braking system in modern vehicles, including automobiles and motorcycles. They use friction between a disc brake rotor and brake pads to slow or stop the vehicle. Compared to drum brakes, disc brakes offer improved heat dissipation, higher braking efficiency, and enhanced handling and safety. However, traditional single-piston disc brakes often compress one side of the brake pad during braking, causing deformation and impacting the braking system's performance and safety. Double-acting disc brakes, on the other hand, prevent pad deformation and provide stronger, more balanced braking performance.

[0003] Patent CN103448853A provides a thin, double-sided disc brake. The double-arm pull rod has left and right arms, with an elastic feel adjustment device between them. A movable push rod is inserted into the middle of the right push rod, and one end of the right push rod has an annular groove for mounting a retaining spring. The neck of the movable push rod has a through hole into which an elastic steel wire is inserted. While this utility model can achieve simultaneous dynamic clamping on both sides, it still uses an indirect method, installing two drive devices on the same side, which makes that side larger and taller, hindering miniaturization and lightweighting.

[0004] Patent CN 212055613U relates to a novel mechanical disc brake device. A drive shaft is positioned within the mounting cavity, with a second gear meshing with a first gear mounted on the drive shaft. The drive shaft also features a positive thread portion and a negative thread portion. The positive thread portion engages with a first threaded hole in a first clamping plate, while the negative thread portion engages with a second threaded hole in a second clamping plate. The first and second threaded holes have the same thread direction. This utility model achieves direct bidirectional braking, but due to the lack of torque-increasing measures and the mechanical nature of the drive mechanism, the required braking force is relatively high, placing higher demands on the strength of the brake cable material.

[0005] Patent CN 103738450A discloses a mechanical double-action disc brake. A drive arm and a drive disc are mounted on the housing. A drive component is connected between the drive arm and the drive disc, converting the arm's rotational motion into axial motion of the drive disc. A first friction plate is mounted on the end face of the drive disc, and a second friction plate is mounted on the housing. The disc is positioned between the first and second friction plates. This invention allows both friction plates to move toward the disc simultaneously, eliminating the need for the disc to deform during braking. However, this invention suffers from wear and tear on the friction plates over time, with their surface gradually becoming thinner. This requires readjusting the distance between the brake pad and the disc or replacing the brake pad, a complex process. Summary of the Invention

[0006] The present invention aims to avoid the above-mentioned deficiencies in the prior art and to provide a disc brake to achieve bidirectional braking, avoid deformation of the brake pads, and provide stronger and more balanced braking performance.

[0007] The present invention adopts the following technical solutions to solve the technical problems:

[0008] The double-acting motor disc brake device of the present invention is characterized by being composed of a drive module, a transmission module and an execution module; in the drive module, the torque output by the motor changes its direction through the bevel gear and is transmitted to the transmission module; in the transmission module, the bevel gear drives the transmission shaft to rotate, and the transmission shaft transmits the torque to the two spur gears, and the spur gears further transmit the torque to the execution module; in the execution module, the threaded rod rotates under the action of the torque and drives the two brake pads to move toward each other, squeezing the brake disc to complete the braking action. After braking is completed, the torsion spring generates torque, and the rotating transmission shaft completes the reset.

[0009] The double-acting motor disc brake device of the present invention is also characterized in that: in the drive module, the motor is mounted on a mounting plate inside the housing and fixedly connected by four bolts; bevel gear 1 is mounted on the D-shaped shaft of the motor and adopts an interference fit connection; and bevel gear 1 is meshed with bevel gear 2.

[0010] The double-acting motor disc brake device of the present invention is also characterized in that: in the transmission module, the second bevel gear is fixedly connected to the transmission shaft by a common flat key and is positioned using a shoulder provided on the transmission shaft; there are two gears, which are installed on the left and right sides of the transmission shaft, and the gears are fixedly connected to the transmission shaft by the common flat key and are positioned using a shoulder provided on the transmission shaft; a bearing is installed at both ends of the transmission shaft, and the two are fixedly connected, and the bearing is installed in the bearing groove of the outer shell.

[0011] The double-acting motor disc brake device of the present invention is also characterized in that: in the execution module, the gear is engaged with the threaded rod, and the threads at the left and right ends of the threaded rod have opposite rotation directions; brake pad 1 and brake pad 2 are both designed with two threaded holes, the threaded holes of the two brake pads have opposite rotation directions, and cooperate with the two threaded rods; two bearings are fixedly connected to the smooth rod part of the threaded rod, and the bearings are interference-connected with the bearing holes on the outer shell and indirectly locate the positions of the threaded holes; the brake disc is installed between brake pad 1 and brake pad 2, and the distance between the brake pad and the brake disc can be directly controlled by the motor; the positioning rod is fixedly installed on the transmission shaft, and the torsion spring is sleeved on the transmission shaft, one end of the torsion spring is hung in the positioning hole of the positioning rod, and the other end of the torsion spring is fixed in the positioning hole on the outer shell. After adjusting the position of the torsion spring, the braking action can be reset.

[0012] Compared with the existing technology, the beneficial effects of the present invention are embodied in:

[0013] 1. The present invention uses a motor as a driving element. Compared with traditional mechanical brakes, the braking force required is smaller, the strength requirements of materials such as brake lines are lower, and the output torque is smoother and faster, making the brake device more controllable and safer.

[0014] 2. The present invention uses a double-threaded rod to control the brake pads to move toward each other, achieving bidirectional braking, which can avoid deformation of the brake pads and provide stronger and more balanced braking performance. At the same time, the entire device is more streamlined and more efficient.

[0015] 3. The present invention can directly adjust the initial angle of the motor to change the distance between the brake pad and the brake disc, which is easier to operate and convenient for adjustment after the brake pad is worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the appearance and structure of the present invention;

[0017] Figure 2 It is a left view of the internal structure of the present invention;

[0018] Figure 3 It is a front view of the internal structure of the present invention;

[0019] Reference numerals in the figure: 11 motor, 12 housing, 13 bevel gear 1, 21 bevel gear 2, 22 transmission shaft, 23 bearing 1, 24 gear, 25 common flat key, 31 threaded rod, 32 bearing 2, 33 brake pad 1, 34 brake pad 2, 35 positioning rod, 36 torsion spring, 37 brake disc. DETAILED DESCRIPTION

[0020] The design of a double-acting motor disc brake device of the present invention will be further described below with reference to the accompanying drawings.

[0021] See also Figure 1 In this example, the new internal wiper based on the gear rack structure includes a motor 11, a housing 12, a bevel gear 1 13, a bevel gear 2 21, a transmission shaft 22, a bearing 1 23, a gear 24, a common flat key 25, a threaded rod 31, a bearing 2 32, a brake pad 1 33, a brake pad 2 34, a positioning rod 35, a torsion spring 36, and a brake disc 37.

[0022] See also Figure 1 , Figure 2 and Figure 3For the drive module, the motor 11 is mounted on the mounting plate of the housing 12 and fixed with bolts, and the bevel gear 13 is mounted on the D-shaped shaft of the motor 11 with an interference fit. After the power is turned on, the motor 11 rotates to a specified angle so that the brake pad 1 33 and the brake pad 2 34 maintain a certain distance from the brake disc 37 and enter a standby state. When the brake signal is transmitted to the motor 11, the motor 11 immediately generates a certain torque and drives the bevel gear 1 13 to rotate. The bevel gear 1 13 meshes with the bevel gear 2 21 and transmits the torque to the transmission module.

[0023] See also Figure 1 , Figure 2 and Figure 3 For the transmission module, the bevel gear 21 and the transmission shaft 22 are fixedly connected by the ordinary flat key 25 and are positioned by the shoulder provided on the transmission shaft 22; there is a certain transmission ratio between the bevel gear 21 and the bevel gear 1 13, thereby achieving the effect of reducing speed and increasing torque; there are two gears 24, which are installed on the left and right sides of the transmission shaft 22, and the gear 24 and the transmission shaft 22 are fixedly connected by the ordinary flat key 25, and are positioned by the shoulder provided on the transmission shaft 22; the torque generated by the driving module is transmitted to the gear 24 by the transmission shaft 22 after the torque is increased in the transmission module and further acts on the execution module; bearings 1 23 are installed at both ends of the transmission shaft 22, and the two are fixedly connected, and the bearing 1 23 is installed in the bearing groove of the housing 12.

[0024] See also Figure 1 , Figure 2 and Figure 3 , for the execution module, the gear 24 is engaged with the threaded rod 31, and the gear 24 transmits the torque to the threaded rod 31; the threads at the left and right ends of the threaded rod 31 are in opposite directions; the brake pad 1 33 and the brake pad 2 34 are both designed with two threaded holes, the threaded holes of the two brake pads are in opposite directions, and cooperate with the two threaded rods 31; when the threaded rod 31 rotates, it can drive the brake pad 1 33 and the brake pad 2 34 to move in opposite directions, completing two-way braking; two bearings 2 32 are fixedly connected to the light rod part of the threaded rod 31, and the bearings 2 32 are fixedly connected to the The bearing hole on the housing 12 is interference connected and indirectly locates the position of the threaded hole; the brake disc 37 is installed between the brake pad 1 33 and the brake pad 2 34, and the distance between the brake pad and the brake disc can be directly controlled by the motor; the positioning rod 35 is fixedly installed on the transmission shaft 22, and the torsion spring 36 is sleeved on the transmission shaft 22, one end of the torsion spring 36 is hung in the positioning hole of the positioning rod 35, and the other end of the torsion spring 36 is fixed in the positioning hole on the housing 12. After adjusting the position of the torsion spring 36, the braking action can be reset.

Claims

1. A double-acting motor disc brake device, characterized in that It consists of a drive module, a transmission module, and an execution module. In the drive module, the torque output by the motor changes its direction through the bevel gear and is transmitted to the transmission module. In the transmission module, the bevel gear drives the transmission shaft to rotate, and the transmission shaft transmits the torque to the spur gear, which in turn transmits the torque to the execution module. In the execution module, the threaded rod rotates under the action of the torque and drives the two brake pads to move toward each other, squeezing the brake disc to complete the braking action. After braking, the torsion spring generates torque, which rotates the transmission shaft to complete the reset. In the driving module, the motor (11) is mounted on a mounting plate in a housing (12); a bevel gear (13) is mounted on a D-shaped shaft of the motor (11) and is connected by interference fit; the bevel gear (13) is meshed with a bevel gear (21); In the transmission module, the bevel gear 2 (21) is fixedly connected to the transmission shaft (22) via a flat key (25) and positioned by a shaft shoulder provided on the transmission shaft (22); there are two gears (24), which are respectively installed on the left and right sides of the transmission shaft (22); the gears (24) are fixedly connected to the transmission shaft (22) via the flat key (25) and positioned by a shaft shoulder provided on the transmission shaft (22); bearings 1 (23) are installed at both ends of the transmission shaft (22), and the two are fixedly connected, and the bearings 1 (23) are installed in the bearing groove of the housing (12); In the execution module, the gear (24) is engaged with the threaded rod (31), and the threads of the left and right ends of the threaded rod (31) are rotated in opposite directions; the brake pad 1 (33) and the brake pad 2 (34) are both designed with two threaded holes, and the threaded holes of the two brake pads are rotated in opposite directions and cooperate with the two threaded rods (31); two bearings 2 (32) are fixedly connected to the light rod part of the threaded rod (31), and the bearings 2 (32) are interference-connected with the bearing holes on the housing (12) and indirectly locate the position of the threaded holes; the brake disc ( 37) is installed between the brake pad 1 (33) and the brake pad 2 (34), and the distance between the brake pad and the brake disc is directly controlled by the motor; the positioning rod (35) is fixedly installed on the transmission shaft (22), and the torsion spring (36) is sleeved on the transmission shaft (22), one end of the torsion spring (36) is hung in the positioning hole of the positioning rod (35), and the other end of the torsion spring (36) is fixed in the positioning hole on the housing (12). After adjusting the position of the torsion spring (36), the braking action is reset.

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