CN214331283U - Parking brake for hub motor - Google Patents
Parking brake for hub motor Download PDFInfo
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- CN214331283U CN214331283U CN202022392574.1U CN202022392574U CN214331283U CN 214331283 U CN214331283 U CN 214331283U CN 202022392574 U CN202022392574 U CN 202022392574U CN 214331283 U CN214331283 U CN 214331283U
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- screw rod
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- nut sleeve
- parking brake
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Abstract
The utility model relates to the field of brakes, and discloses a parking brake for a hub motor, which comprises a caliper body, wherein a braking area is formed at the lower side of the caliper body; the clamp comprises a clamp body, a nut sleeve, a guide pipe, a screw guide groove, a nut sleeve and a piston sleeve, wherein a screw rod is installed in the clamp body and connected with the clamp body through a bearing, balls are arranged between the screw rod and the nut sleeve, the nut sleeve is provided with the guide pipe, the screw guide groove of the screw rod and the screw guide groove of the nut sleeve form a circulating track of the balls, the piston sleeve is installed in the piston sleeve, the screw rod rotates to drive the nut sleeve to move linearly, and the nut sleeve can drive the piston sleeve to move towards a brake disc through the linear movement. The device not only can realize parking braking, but also can realize service braking, and parking braking drive mechanism has the transmission resistance simultaneously and is little, and the transmission is smooth, advantages such as efficient.
Description
Technical Field
The utility model relates to an in-wheel motor braking field has especially related to a parking brake for in-wheel motor.
Background
The hub motor has the advantages of high efficiency, large peak torque, short acceleration time and the like, and is one of the important development directions of new energy automobiles in the future. The hub motor integrates devices such as steering, braking, driving and the like into the hub, so that the layout of a vehicle chassis is greatly simplified, but the space reserved for mounting and dismounting the brake is greatly reduced. Meanwhile, the hub motor is in an outer rotor layout, the hub is used as a driving unit and is also used as a braking unit, and the brake is required to be arranged on the edge of the hub, so that the arrangement mode of the brake is greatly different from that of a conventional brake, and a matched and adaptive brake is required to be developed.
Chinese patent CN201911039501.X provides a large-cylinder-diameter electronic parking brake assembly, which improves the braking force of an electronic parking brake by increasing the cylinder diameter of a piston of a caliper body (1); the screw nut and the large-cylinder-diameter piston are designed in a matching manner, so that the wall thickness of the piston is reduced, and the weight of a product is effectively reduced; the friction plate is additionally provided with the return spring, so that the dragging torque of the product is reduced, and the oil consumption of the automobile can be effectively reduced; the brake can be suitable for large SUVs and sedan cars, and the types of cars matched with the existing electronic parking brake can be increased. But it cannot be applied to an integrated hub motor and occupies a large space.
SUMMERY OF THE UTILITY MODEL
The utility model discloses shortcoming to prior art in-wheel motor parking brake provides a parking brake for in-wheel motor.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
a parking brake for a hub motor comprises a caliper body, wherein a braking area is formed on the lower side of the caliper body; the clamp comprises a clamp body, a screw rod, a nut sleeve, a guide pipe, a piston sleeve and a nut sleeve, wherein the screw rod is installed in the clamp body, a ball is arranged between the screw rod and the nut sleeve in an external assembly mode, the guide pipe is installed on the nut sleeve, the guide pipe, a spiral guide groove of the screw rod and a spiral guide groove of the nut sleeve form a circulation track of the ball, the nut sleeve is driven to linearly move by the rotation of the screw rod, and the piston sleeve can be driven to move towards a brake disc by the linear motion of the nut sleeve.
Preferably, the piston sleeve and the outer wall of the piston sleeve are sleeved with the sealing ring in an interference fit mode, the inner wall of the caliper body is provided with a limiting groove for limiting the outer ring of the sealing ring, the sealing ring deforms when the piston moves downwards under the thrust of the nut sleeve to the braking area, and when the nut sleeve removes the external force on the piston, the sealing ring deforms and restores and drives the piston to return.
Preferably, the guide pipe fixing device further comprises a fixing piece, the outer side surface of the nut sleeve is provided with insertion holes, the insertion holes are arranged in pairs, two ends of the guide pipe are inserted into the insertion holes, the insertion holes are communicated with a circulating track formed by a spiral guide groove of the screw rod and a spiral guide groove of the nut sleeve, the fixing piece is clamped on the outer wall of the guide pipe to fix the guide pipe on the nut sleeve, and the fixing piece is fixedly connected with the nut sleeve through a mounting bolt.
Preferably, the inner side of the fixing piece is formed with a clamping groove for limiting the guide pipe, and the number of the clamping grooves is matched with that of the guide pipes.
Preferably, the middle part of the piston sleeve is a cavity with an opening at the upper end and a cover at the lower end, the outer wall of the nut sleeve is provided with a limiting structure, and the limiting structure is fan-shaped.
Preferably, the clamp further comprises a mounting frame, the clamp body is connected with the mounting frame through a guide pin, and the clamp body can move up and down along the guide pin.
Preferably, the oil injection nozzle is arranged on the clamp body, the mounting cavity is formed in the clamp body, the screw rod, the piston and the nut sleeve are mounted in the mounting cavity, the oil injection nozzle is communicated with the mounting cavity, and a closed space is formed on the inner wall of the mounting cavity, the outer wall of the piston and the upper end face of the sealing ring.
Preferably, an inner brake shoe and an outer brake shoe are mounted in the mounting section.
Preferably, the number of conduits is at least two.
The utility model discloses a parking brake assembly has following technological effect:
the utility model provides a parking brake simple, be convenient for installation and dismantlement. The whole structure is compact, and the arrangement in the wheel hub is convenient. Secondly adopt double track way circulation ball connection structure between inside parking mechanism screw rod and the swivel nut, change sliding friction into rolling friction, the coefficient of friction is little between the screw rod swivel nut, and transmission efficiency is high to the braking is sensitive, and the double track way structure has especially been adopted, has avoided the jamming problem that the selection ring ball is too much to cause, has also increased axial contact length simultaneously, has strengthened transmission stability. The scheme has the advantages of service braking and parking braking functions, high efficiency, simple process, low cost and the like.
Drawings
FIG. 1 is a schematic illustration of the engagement of a brake and a brake disc.
Fig. 2 is a schematic structural view of the brake.
Fig. 3 is a schematic view of the internal structure of the brake.
FIG. 4 is a block diagram of the screw, ball and duct.
FIG. 5 is a schematic view of a nut sleeve.
The names of the parts indicated by the numerical references in the drawings are as follows: the hydraulic brake device comprises a clamp body 1, a brake area 2, a screw rod 3, a bearing 5, a nut sleeve 6, a ball 7, a guide pipe 8, a spiral guide groove 9, a piston sleeve 10, a brake disc 11, a seal ring 12, a limit groove 13, a fixing piece 14, a jack 15, a circulating track 16, a clamping groove 17, a cavity 18, a limit structure 19, a mounting frame 20, an oil injection nozzle 21, an installation cavity 22, a spline groove 23 and a guide pin 24.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
A parking brake for a hub motor is a floating brake, and comprises a caliper body 1, wherein a braking area 2 is formed on the lower side of the caliper body 1, a caliper claw is arranged at the lower end of the caliper body 1, and the braking area 2 is formed by the lower end of the caliper claw and the lower end of a piston; in the embodiment, the piston movement is driven by adopting a mode that the motor drives the screw rod 3 to drive the nut sleeve 6. The upper end of the screw rod 3 is fixed with the clamp body 1 through a bearing 5. The clamp comprises a clamp body 1, a screw rod 3, a nut sleeve 6, a ball 7, a guide pipe 8, a spiral guide groove 9 of the screw rod 3 and a spiral guide groove 9 of the nut sleeve 6, and a piston sleeve 10, wherein the screw rod 3 is installed in the clamp body 1, the nut sleeve 6 is installed outside the screw rod 3, the ball 7 is arranged between the screw rod 3 and the nut sleeve 6, the guide pipe 8, the spiral guide groove 9 of the nut sleeve 6 and the spiral guide groove 9 of the nut sleeve 6 form a circulating track 16 of the ball 7, the nut sleeve 6 is driven to move linearly by the rotation of the screw rod 3, and the piston sleeve 10 can be driven to move towards a brake disc 11 by the linear movement of the nut sleeve 6. When the screw rod 3 rotates, the nut sleeve 6 is driven to move, the ball 7 rolls on the circulating track 16, resistance is reduced, the process is smoother, and stability is better.
In this embodiment, the outer walls of the piston sleeve 10 and the caliper body 1 are sleeved with a seal ring 12 in an interference manner, the inner wall of the caliper body 1 is provided with a limit groove 13 for limiting the outer ring of the seal ring 12, when the piston moves downwards under the thrust of the nut sleeve 6 to the braking area 2, the seal ring 12 deforms, and when the nut sleeve 6 removes the external force on the piston, the seal ring 12 deforms and recovers and drives the piston to return.
In order to facilitate the fixed installation of the conduit 8, the guide pipe fixing device further comprises a fixing piece 14, the outer side surface of the nut sleeve 6 is provided with insertion holes 15, the insertion holes 15 are arranged in pairs, two ends of the conduit 8 are inserted into the insertion holes 15, the insertion holes 15 are communicated with a circulating track 16 formed by the spiral guide groove 9 of the screw rod 3 and the spiral guide groove 9 of the nut sleeve 6, the fixing piece 14 is clamped on the outer wall of the conduit 8 to fix the conduit 8 on the nut sleeve 6, and the fixing piece 14 is fixedly connected with the nut sleeve 6 through a mounting bolt.
In order to make the fixing piece 14 and the guide tube 8 more convenient to fix and occupy less space, a clamping groove 17 for limiting the guide tube 8 is formed on the inner side of the fixing piece 14, and the number of the guide tubes 8 in the clamping groove 17 is matched with that of the guide tubes 8. The number of the guide tubes 8 in this embodiment is two, and the whole fixing piece 14 is arranged in an "M" shape.
In this embodiment, the middle of the piston sleeve 10 is a cavity 18 with an opening at the upper end and a cover at the lower end, a limiting structure 19 is arranged at one end of the outer wall of the nut sleeve 6 close to the braking area 2, and the limiting structure 19 is fan-shaped.
The brake further includes a mounting bracket 20, the mounting bracket 20 being fixedly mounted to the frame or other mounting member. The clamp body 1 is connected with the mounting frame 20 through a guide pin 24, and the clamp body 1 can move up and down along the guide pin 24. Specifically, two guide pins 24 are arranged on the mounting frame 20, and holes matched with the guide pins 24 are arranged on the caliper body 1.
In order to facilitate rolling of the ball 7 and matching of the screw rod 3 and the nut sleeve 6, the clamp body 1 is provided with an oil injection nozzle 21, an installation cavity 22 is formed inside the clamp body 1, the screw rod 3, the piston and the nut sleeve 6 are installed in the installation cavity 22, the oil injection nozzle 21 is communicated with the installation cavity 22, and a closed space is formed between the inner wall of the installation cavity 22, the outer wall of the piston and the upper end face of the sealing ring 12.
In this embodiment, the mounting section has an inner pad located at the lower end of the piston and an outer pad supported on the jaw, both of which are slidably engaged with the mounting bracket 20.
The service braking process of the brake is as follows:
the mounting bracket 20 is fixed on the steering knuckle, and the caliper body 1 is mounted on the mounting bracket 20 through a guide pin 24 and can slide axially along the guide pin 24.
And a rubber shockproof sleeve is assembled outside the guide pin 24 to play a role in shock absorption and noise prevention. A piston is arranged in the caliper body 1, and when the caliper body 1 is braked in a running mode, the outside of the caliper body 1 is connected with an external brake hydraulic pipeline through an oil inlet; the interior and the piston form a brake hydraulic space, and a rectangular sealing ring 12 and a circular sealing ring 12 are arranged to prevent brake fluid from leaking. After the external brake fluid enters the cylinder body through the oil inlet hole, the braking pressure is built on the piston and the caliper body 1, and the brake fluid and the piston and the caliper body are separated from each other. The piston presses the inner friction block to approach the brake disc 11, and the hook head of the caliper body 1 presses the outer friction block to move like the brake disc 11. With the enhancement of the brake hydraulic pressure, the brake clearance is eliminated, the function of the inner friction block and the outer friction block for extruding the brake disc 11 is generated, and the driving braking action is formed.
The parking brake works as follows:
after the parking signal is sent, an external motor drives the screw rod 3 to rotate, and the rotation mode is converted into a translation motion mode through a circulating ball screw rod transmission pair between the screw rod 3 and the screw sleeve, so that the action of pushing the extrusion piston is generated. Meanwhile, the screw rod 3 is extruded by the top bearing 5 of the clamp body 1 under the action of the reaction force so as to push the hook head of the clamp body 1 to extrude the outer friction block. The inner and outer pads compress the brake disc 11 under the above-mentioned motion to produce the parking brake effect. After parking braking is finished, the motor rotates reversely, the acting force of the nut sleeve 6 on the piston is removed, and the piston returns to the initial position under the action of deformation and recovery of the sealing ring 12.
The utility model discloses a manual valve assembly has following technological effect:
the utility model provides a parking brake simple, be convenient for installation and dismantlement. The whole structure is compact, and the arrangement in the wheel hub is convenient. Secondly adopt double track way circulation ball connection structure between inside parking mechanism screw rod 3 and the swivel nut, change sliding friction into rolling friction, the coefficient of friction is little between the screw rod 3 swivel nut, and transmission efficiency is high to the braking is sensitive, and the special double track way structure that has adopted has avoided the jamming problem that the selection ring ball is too much to cause, has also increased axial contact length simultaneously, has strengthened transmission stability. The scheme has the advantages of service braking and parking braking functions, high efficiency, simple process, low cost and the like.
Example 2
This embodiment is different from embodiment 1 in that: the number of the guide tubes 8 in this embodiment is three.
Example 3
This embodiment differs from embodiment 1 in that: the seal ring 12 is a seal ring 12 having a rectangular cross section.
Example 4
This embodiment is different from embodiment 1 in that: the upper end of the screw rod 3 is provided with a limiting ring for limiting the displacement of the upper end of the nut sleeve 6, and the upper end of the screw rod 3 is provided with a spline groove 23 for being connected with an external motor.
Claims (10)
1. A parking brake for a hub motor comprises a caliper body (1), wherein a brake area (2) is formed on the lower side of the caliper body (1); the method is characterized in that: install screw rod (3) in pincers body (1), screw rod (3) are connected through bearing (5) and pincers body (1), the outside assembly and nut cover (6) of screw rod (3), be provided with ball (7) between screw rod (3) and nut cover (6), install pipe (8) on nut cover (6), spiral guide slot (9) of pipe (8) and screw rod (3), nut cover (6) spiral guide slot (9) form circulation track (16) of ball (7), still include piston cover (10), screw rod (3), nut cover (6) and pipe (8) are installed in piston cover (10), screw rod (3) rotate and drive nut cover (6) linear motion, nut cover (6) linear motion can drive piston cover (10) to brake disc (11) direction motion.
2. A parking brake for an in-wheel motor according to claim 1, characterized in that: the outer wall of the piston sleeve (10) and the outer wall of the caliper body (1) are sleeved with a sealing ring (12) in an interference fit mode, a limiting groove (13) for limiting the outer ring of the sealing ring (12) is formed in the inner wall of the caliper body (1), when the piston moves downwards under the thrust of the nut sleeve (6) to the braking area (2), the sealing ring (12) deforms, and when the nut sleeve (6) removes the external force on the piston, the sealing ring (12) deforms and recovers and meanwhile drives the piston to return.
3. A parking brake for an in-wheel motor according to claim 2, characterized in that: the screw-nut-type pipe joint is characterized by further comprising a fixing piece (14), wherein jacks (15) are formed in the outer side face of the nut sleeve (6), the jacks (15) are arranged in pairs, two ends of the guide pipe (8) are inserted into the jacks (15), the jacks (15) are communicated with a circulating track (16) formed by the screw guide grooves (9) of the screw rod (3) and the nut sleeve (6), the guide pipe (8) is fixed on the nut sleeve (6) through the outer wall of the guide pipe (8) in a clamping mode, and the fixing piece (14) is fixedly connected with the nut sleeve (6) through an installation bolt.
4. A parking brake for an in-wheel motor according to claim 1, characterized in that: the inner side of the fixing piece (14) is provided with a clamping groove (17) for limiting the guide pipe (8), and the number of the clamping grooves (17) is matched with that of the guide pipes (8).
5. A parking brake for an in-wheel motor according to claim 1, characterized in that: the middle part of the piston sleeve (10) is a cavity (18) with an opening at the upper end and a cover at the lower end, one end of the outer wall of the nut sleeve (6) close to the braking area (2) is provided with a limiting structure (19), and the limiting structure (19) is fan-shaped.
6. A parking brake for an in-wheel motor according to claim 1, characterized in that: the clamp is characterized by further comprising a mounting frame (20), the clamp body (1) is connected with the mounting frame (20) through a guide pin (24), and the clamp body (1) can move up and down along the guide pin (24).
7. A parking brake for an in-wheel motor according to claim 2, characterized in that: be provided with oiling mouth (21) on pincers body (1), pincers body (1) inside is formed with installation cavity (22), and screw rod (3), piston and nut cover (6) are installed in installation cavity (22), and oiling mouth (21) and installation cavity (22) intercommunication, and the up end of the inner wall and the piston outer wall of installation cavity (22) and sealing washer (12) forms airtight space.
8. A parking brake for an in-wheel motor according to claim 1, characterized in that: the number of the conduits (8) is at least two.
9. A parking brake for an in-wheel motor according to claim 2, characterized in that: the sealing ring (12) is a sealing ring (12) with a rectangular cross section, and the bearing (5) is a thrust bearing (5).
10. A parking brake for an in-wheel motor according to claim 1, characterized in that: the upper end of the screw rod (3) is provided with a limiting ring for limiting the displacement of the upper end of the nut sleeve (6), and the upper end of the screw rod (3) is provided with a spline groove (23) for being connected with an external motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022392574.1U CN214331283U (en) | 2020-10-23 | 2020-10-23 | Parking brake for hub motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022392574.1U CN214331283U (en) | 2020-10-23 | 2020-10-23 | Parking brake for hub motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214331283U true CN214331283U (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022392574.1U Active CN214331283U (en) | 2020-10-23 | 2020-10-23 | Parking brake for hub motor |
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| Country | Link |
|---|---|
| CN (1) | CN214331283U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194163A (en) * | 2021-10-29 | 2022-03-18 | 浙江诸暨万宝机械有限公司 | MGU driving single-piston electronic parking system with single motor and single turbine |
-
2020
- 2020-10-23 CN CN202022392574.1U patent/CN214331283U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194163A (en) * | 2021-10-29 | 2022-03-18 | 浙江诸暨万宝机械有限公司 | MGU driving single-piston electronic parking system with single motor and single turbine |
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