阅读说明：本技术 带有电动控制轮缸的鼓式制动器 (Drum brake with electric control wheel cylinder ) 是由 王变变 蔡伟 黄建凌 凌利峰 姚兴娟 汪永胜 黄伟 施英杰 黄东方 朱子亨 于 2020-05-19 设计创作，主要内容包括：本发明公开了一种带有电动控制轮缸的鼓式制动器。包括制动底板、上回位弹簧、制动蹄、下回位弹簧、压簧组件和电动轮缸；缸体开设水平缸孔,水平缸孔两端装活塞件,电机位于螺套外,螺套一端内通过螺纹套装有螺杆的一端,电机和太阳齿轮同轴固接,太阳齿轮开设有中心通孔,太阳齿轮周围设有啮合的行星齿轮,太阳齿轮和行星齿轮铰接于行星架上,螺杆穿过太阳齿轮中心通孔后的端部可轴向移动地连接,螺套和螺杆延伸到水平缸孔的孔端处并和两端的活塞件连接。本发明将整套传动机构内置在缸体内,实现了通过电动控制方式的制动过程,同时能将驻车制动和行车制动功能集成于一体。(The invention discloses a drum brake with an electric control wheel cylinder. The brake shoe comprises a brake bottom plate, an upper return spring, a brake shoe, a lower return spring, a pressure spring assembly and an electric wheel cylinder; the cylinder body sets up horizontal jar hole, horizontal jar hole both ends dress piston spare, the motor is located outside the swivel nut, the one end of screw rod is overlapped through the screw thread in the swivel nut one end, the coaxial rigid coupling of motor and sun gear, central through-hole has been seted up to sun gear, be equipped with the engaged planetary gear around the sun gear, sun gear and planetary gear articulate on the planet carrier, but the tip axial displacement ground connection after the screw rod passes sun gear central through-hole, the swivel nut extends to the aperture department in horizontal jar hole and is connected with the piston spare at both ends. The invention embeds the whole set of transmission mechanism in the cylinder body, realizes the braking process in an electric control mode, and can integrate the parking braking function and the service braking function into a whole.)

1. A drum brake with an electric control wheel cylinder comprises a brake bottom plate (1), an upper return spring (2), a brake shoe (4), a lower return spring (5) and a pressure spring assembly; the method is characterized in that: the brake shoe rack is characterized by further comprising electric wheel cylinders (8), brake shoes (4) are mounted on the two sides of the brake base plate (1) through pressure spring assemblies, the electric wheel cylinders (8) are mounted on the upper portion of the brake base plate (1), the upper end portions of the brake shoes (4) on the two sides are connected through the electric wheel cylinders (8), the upper portions of the brake shoes (4) on the two sides are connected through upper return springs (2), and the lower portions of the brake shoes (4) on the two sides are connected through lower return springs (5);

the electric wheel cylinder (8) comprises a cylinder body (8.1), a screw (8.5), a planet carrier (8.6), a planet gear (8.7), a sun gear (8.8), a motor (8.9), a threaded sleeve (8.10) and a piston piece; the horizontal cylinder hole is arranged on the cylinder body (8.1), piston pieces are arranged at two ends of the horizontal cylinder hole, a screw rod (8.5), a planet carrier (8.6), a planetary gear (8.7), a sun gear (8.8), a motor (8.9) and a thread sleeve (8.10) are arranged in the horizontal cylinder hole of the cylinder body (8.1), the motor (8.9) is positioned outside the periphery of the thread sleeve (8.10), one end of the screw rod (8.5) is sleeved in one end of the thread sleeve (8.10) through threads, the output end of the motor (8.9) is coaxially and fixedly connected with the sun gear (8.8), a central through hole is arranged on the sun gear (8.8), the planetary gear (8.7) which is connected in a meshed manner is arranged on the periphery of the sun gear (8.8), the sun gear (8.8) and the planetary gear (8.7) are both hinged and arranged on the planet carrier (8.6), the screw rod (8.5) and the thread sleeve (8.10) are arranged on the periphery of the sun gear (8.8.8), and can be connected with the central through the axial through hole of the central through groove (8.8.10), the other ends of the screw sleeve (8.10) and the screw rod (8.5) extend to the hole end of the horizontal cylinder hole and are respectively connected with the piston pieces at the two ends.

2. The drum brake with the electronically-controlled wheel cylinder according to claim 1, characterized in that: the piston piece comprises a shield (8.2), a piston (8.3) and a sealing ring (8.4); a protective cover (8.2) is covered outside the hole end of the horizontal cylinder hole, a piston (8.3) is arranged in the hole end of the horizontal cylinder hole, a central boss is arranged on the outer end face of the piston (8.3), the central boss extends out of the central hole of the protective cover (8.2) and is matched and assembled, the outer peripheral face of the piston (8.3) is connected with the hole wall of the horizontal cylinder hole through a sealing ring (8.4), and the inner end face of the piston (8.3) is connected with the end face of a screw sleeve (8.10)/screw rod (8.5).

3. The drum brake with the electronically-controlled wheel cylinder according to claim 1, characterized in that: the pressure spring subassembly include pressure spring pull rod (3), pressure spring (6) and pressure spring seat (7), pressure spring seat (7) are connected at the both ends that pressure spring pull rod (3) passed behind the hoof of brake shoe (4) and braking bottom plate (1), the cover is equipped with pressure spring (6) on pressure spring pull rod (3) between brake shoe (4) and braking bottom plate (1).

4. The drum brake with the electronically-controlled wheel cylinder according to claim 1, characterized in that: the cylinder body (8.1) is provided with a connector (1.2), the connector (1.2) is installed on the outer wall of the cylinder body (8.1), and an external power supply is electrically connected with the motor (8.9) through the connector (1.2).

5. The drum brake with the electronically-controlled wheel cylinder according to claim 1, characterized in that: an annular inner ring gear (1.1) is arranged in the middle of the inner wall of the horizontal cylinder hole of the cylinder body (8.1), and the annular inner ring gear (1.1) is meshed with the planetary gear (8.7).

6. The drum brake with the electronically-controlled wheel cylinder according to claim 1, characterized in that: the motor (8.9) is a hollow motor.

7. The drum brake with the electronically-controlled wheel cylinder according to claim 1, characterized in that: the thread connected between the screw rod (8.5) and the thread sleeve (8.10) is a self-locking thread.

Technical Field

The invention relates to a drum brake in the technical field of vehicle parking brake equipment, in particular to a drum brake with an electric control wheel cylinder.

Background

With the development of the automobile industry and the gradual progress of the unmanned technology, the brake-by-wire system can be further popularized and becomes an indispensable part of future intelligent vehicles. The brakes on the market, especially drum brakes, basically complete conventional service braking by hydraulic pressure, while the parking braking in the prior art needs another mechanism, such as an electric control mechanism, and the prior art lacks a set of wheel cylinder mechanisms and brakes thereof for electrically controlling service braking and parking braking.

Disclosure of Invention

To solve the problems of the background art, the present invention provides a drum brake with an electrically controlled wheel cylinder.

The invention adopts the following technical scheme:

the brake shoe brake comprises a brake bottom plate, an upper return spring, brake shoes, a lower return spring, a pressure spring assembly and electric wheel cylinders, wherein the brake shoes are arranged on the two sides of the brake bottom plate through the pressure spring assembly;

the electric wheel cylinder comprises a cylinder body, a screw rod, a planet carrier, a planetary gear, a sun gear, a motor, a threaded sleeve and a piston piece; horizontal jar hole is seted up to the cylinder body, the piston spare all is equipped with at the both ends in horizontal jar hole, the screw rod, the planet carrier, sun gear, motor and swivel nut are all installed in horizontal jar hole of cylinder body, the motor is located outside around the swivel nut, the one end of screw rod is equipped with through the screw thread cover in the swivel nut one end, the output and the coaxial rigid coupling of sun gear of motor, central through-hole has been seted up to sun gear, be equipped with the planetary gear that the looks meshing is connected around the sun gear, sun gear and planetary gear all articulate and install on the planet carrier, sun gear's central through-hole is all worn to establish by screw rod and swivel nut, and the tip that the screw rod passed behind the sun gear central through-hole passes through keyway and swivel nut and is connected with axial displacement, the other end of swivel nut and screw rod.

The piston piece comprises a protective cover, a piston and a sealing ring; the protective cover is arranged outside the hole end of the horizontal cylinder hole, the piston is arranged in the hole end of the horizontal cylinder hole, the outer end face of the piston is provided with a central boss, the central boss extends out of the central hole of the protective cover and is assembled in a matching mode, the outer peripheral face of the piston is connected with the hole wall of the horizontal cylinder hole through a sealing ring, and the inner end face of the piston is connected with the end face of the screw sleeve/screw rod.

The pressure spring assembly comprises a pressure spring pull rod, a pressure spring and a pressure spring seat, two ends of the pressure spring pull rod, which penetrate through a shoe of the brake shoe and the brake bottom plate, are connected with the pressure spring seat, and the pressure spring is sleeved on the pressure spring pull rod between the brake shoe and the brake bottom plate.

The cylinder body is provided with a connector, the connector is arranged on the outer wall of the cylinder body, and an external power supply is electrically connected with the motor through the connector.

And an inner gear of an annular inner ring is arranged in the middle of the inner wall of the horizontal cylinder hole of the cylinder body, and the inner gear is meshed and connected with the planetary gear.

The motor is a hollow motor.

The thread connected between the screw rod and the thread sleeve is a self-locking thread.

The invention has the beneficial effects that:

the invention relates to a drum brake with an electric control wheel cylinder.A whole set of transmission mechanism is arranged in a cylinder body, thereby realizing the braking process in an electric control mode and integrating the parking braking function and the service braking function.

Drawings

FIG. 1 is an exploded view of a drum brake with an electronically controlled wheel cylinder according to the present invention;

in fig. 1: 1-a brake bottom plate, 2-an upper return spring, 3-a pressure spring pull rod, 4-a brake shoe, 5-a lower return spring, 6-a pressure spring, 7-a pressure spring seat and 8-an electric wheel cylinder;

fig. 2 is a side view of the drum brake with the electronically controlled wheel cylinder of the present invention.

FIG. 3 is an assembled cross-sectional view of an electric-controlled wheel cylinder of the present invention;

in fig. 3: 8.1-cylinder body, 8.2-protective cover, 8.3-piston, 8.4-sealing ring, 8.5-screw, 8.6-planetary frame, 8.7-planetary gear, 8.8-sun gear, 8.9-motor and 8.10-screw sleeve.

Fig. 4 is a block diagram of the electric-controlled wheel cylinder of the present invention.

Detailed Description

The drum brake of the invention is further explained by combining the attached drawings of the specification.