CN212407389U - Drum brake with electric control wheel cylinder - Google Patents
Drum brake with electric control wheel cylinder Download PDFInfo
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- CN212407389U CN212407389U CN202020838364.8U CN202020838364U CN212407389U CN 212407389 U CN212407389 U CN 212407389U CN 202020838364 U CN202020838364 U CN 202020838364U CN 212407389 U CN212407389 U CN 212407389U
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- sun gear
- pressure spring
- piston
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Abstract
The utility model discloses a drum brake with 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 utility model discloses embed a whole set of drive mechanism in the cylinder body, realized the braking process through the electric control mode, can integrate parking braking and service brake function in an organic whole simultaneously.
Description
Technical Field
The utility model belongs to the technical field of vehicle parking braking equipment technique and specifically relates to a drum brake with electric control wheel cylinder has been related to.
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.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem existing in the background art, the utility model provides a drum brake with electric control wheel cylinder.
The utility model adopts the following technical scheme:
the utility model discloses a brake shoe is all installed to the bottom plate through the pressure spring subassembly in both sides to brake bottom plate, and electronic wheel cylinder is installed on brake bottom plate upper portion, connects through electronic wheel cylinder between the upper portion tip of the brake shoe of both sides, connects through last return spring between the upper portion of the brake shoe of both sides, connects through return spring down between the lower part of the brake shoe of both sides;
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 utility model has the advantages that:
the utility model discloses a drum brake with electric control wheel cylinder embeds a whole set of drive mechanism in the cylinder body, has realized the braking process through the electric control mode, can integrate parking braking and service braking function in an organic whole simultaneously.
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 an electrically controlled wheel cylinder according to the present invention.
FIG. 3 is an assembled cross-sectional view of the electric control 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 structure diagram of the electric control wheel cylinder of the present invention.
Detailed Description
The drum brake of the present invention will be further described with reference to the accompanying drawings.
The brake shoe structure is specifically implemented as shown in fig. 1 and 2, and comprises a brake bottom plate 1, an upper return spring 2, brake shoes 4, a lower return spring 5, a pressure spring assembly and electric wheel cylinders 8, wherein the brake shoes 4 are installed on two sides of the brake bottom plate 1 through the pressure spring assembly, the electric wheel cylinders 8 are installed on the upper portion of the brake bottom 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 the upper return spring 2, and the lower portions of the brake shoes 4 on the two sides are connected through the lower return spring 5.
When the brake shoe is in forward operation, the electric wheel cylinder 8 can continuously push the brake shoe 4 to move towards two sides until a load is generated between the brake shoe and an external device to generate a braking force, and the current of the electric wheel cylinder 8 can be increased until a set target current value is reached and then the brake shoe can be stopped.
When the brake shoe is reversely operated, the electric wheel cylinder 8 moves reversely to release force, the brake shoe 4 returns through the upper return spring 2 and the lower return spring 5 until the load of the brake shoe 4 and an external device is zero, and after the working current is constant, the electric wheel cylinder 8 stops working to release braking.
As shown in fig. 3, the electric wheel cylinder 8 comprises a cylinder 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 screw sleeve 8.10 and a piston piece; horizontal cylinder hole is seted up to cylinder body 8.1, the piston spare all is equipped with at the both ends in horizontal cylinder hole, screw rod 8.5, planet carrier 8.6, planetary gear 8.7, sun gear 8.8, motor 8.9 and swivel nut 8.10 are all installed in cylinder body 8.1 horizontal cylinder hole, motor 8.9 is located around swivel nut 8.10 outside, the one end of screw rod 8.5 is overlapped through the screw thread in swivel nut 8.10 one end, the output of motor 8.9 and the coaxial rigid coupling of sun gear 8.8, motor 8.9 is hollow motor, outer lane stator links with cylinder body 1 admittedly, the inner circle rotor is hollow structure. A central through hole is formed in the sun gear 8.8, a plurality of planetary gears 8.7 which are meshed and connected with each other are arranged around the sun gear 8.8, the sun gear 8.8 and the planetary gears 8.7 are hinged to the planet carrier 8.6, the screw rod 8.5 and the threaded sleeve 8.10 penetrate through the central through hole of the sun gear 8.8, the end part of the screw rod 8.5, which penetrates through the central through hole of the sun gear 8.8, is axially movably connected with the threaded sleeve 8.10 through a key groove, and in the specific implementation, the axial length of the key is shorter than that of the strip-shaped groove; the other ends of the screw sleeve 8.10 and the screw 8.5 extend to the hole end of the horizontal cylinder hole and are respectively connected with the piston pieces at the two ends.
As shown in fig. 3, the piston member comprises a shield 8.2, a piston 8.3, a seal ring 8.4; the protective cover 8.2 is covered outside the hole end of the horizontal cylinder hole, the piston 8.3 is arranged in the hole end of the horizontal cylinder hole, the outer end face of the piston 8.3 is provided with a central boss, the central boss extends out of the central hole of the protective cover 8.2 and is assembled in a matching mode, 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 the screw sleeve 8.10/the screw rod 8.5. The utility model discloses a guard shield 8.2 and cylinder body 8.1 and piston 8.3 cooperation play sealed effect.
The thread connected between the screw 8.5 and the screw sleeve 8.10 is self-locking thread, so that the parking state of the vehicle when the vehicle is flamed out can be ensured.
The pressure spring assembly comprises a pressure spring pull rod 3, a pressure spring 6 and a pressure spring seat 7, two ends of the pressure spring pull rod 3, which penetrate through a brake shoe 4 and a brake bottom plate 1, are connected with the pressure spring seat 7, and the pressure spring 6 is sleeved on the pressure spring pull rod 3 between the brake shoe 4 and the brake bottom plate 1.
As shown in fig. 4, a connector 1.2 is arranged on the cylinder 8.1, the connector 1.2 is arranged on the outer wall of the cylinder 8.1, and an external power supply is electrically connected with the motor 8.9 through the connector 1.2.
As shown in fig. 4, an annular inner ring internal 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 internal gear 1.1 is meshed with the planetary gear 8.7.
The utility model discloses an implement the working process as follows:
after the motor 8.9 is electrified, the sun gear 8 which is fixedly connected is driven to rotate, the sun gear 8.8 drives the planet carrier 8.6 to rotate through the planet gear 8.7, the planet carrier 8.6 and the thread sleeve 8.10 have a circumferential coaxial structure and an axial movement limiting structure, the planet carrier 8.6 selectively drives the thread sleeve 8.10 to rotate circumferentially together, the thread sleeve 8.10 is meshed with the screw 8.5 in a threaded manner, the screw 8.5 is axially connected with the piston 8.3, and the screw 8.5 and the thread sleeve 8.10 generate axial displacement due to relative rotation.
When the electric control wheel cylinder works in the positive direction, the screw 8.5 and the screw sleeve 8.10 move towards the outer sides of the two sides, the piston 8.3 is pushed outwards, and the piston 8.3 pushes the brake shoe 4 to generate load; when the electric control wheel cylinder works reversely, the screw 8.5 and the screw sleeve 8.10 move towards the inner side of the center, and the piston 8.3 returns by utilizing the load of the upper return spring 2 connected with the brake shoe 4.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020838364.8U CN212407389U (en) | 2020-05-19 | 2020-05-19 | Drum brake with electric control wheel cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020838364.8U CN212407389U (en) | 2020-05-19 | 2020-05-19 | Drum brake with electric control wheel cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212407389U true CN212407389U (en) | 2021-01-26 |
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ID=74403868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020838364.8U Active CN212407389U (en) | 2020-05-19 | 2020-05-19 | Drum brake with electric control wheel cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212407389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232879A1 (en) * | 2020-05-19 | 2021-11-25 | 浙江亚太机电股份有限公司 | Drum brake with electrically controlled wheel cylinder |
-
2020
- 2020-05-19 CN CN202020838364.8U patent/CN212407389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232879A1 (en) * | 2020-05-19 | 2021-11-25 | 浙江亚太机电股份有限公司 | Drum brake with electrically controlled wheel cylinder |
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