Electric vehicle hub brake

Abstract

The utility model discloses an electric vehicle hub brake which comprises a brake shell, one side of the brake shell is a brake cabin, and the opposite side of the brake shell is an outer decorative face. The first ends of the shoe blocks are rotationally connected with shoe pins fixedly mounted in the brake cabin; the transmission part is driven to rotate to drive the distance between the second ends of the two shoe blocks to be adjustable; a gear is rotationally arranged at the second end of the shoe block through a pin; the transmission part is a gear transmission shaft, and the gear is in meshing transmission with the gear transmission shaft. According to the electric vehicle hub brake provided by the utility model, piston motion is replaced by gear transmission so as to drive the shoe blocks to brake, so that the situation that the electric vehicle is stuck due to dust accumulation can be avoided, the braking safety is greatly improved, and the braking instantaneity is far superior to that of a piston motion structure.

Description

Technical Field

[0001] The utility model relates to a vehicle hub brake, in particular to an electric vehicle hub brake. Background Art

[0002] The hub brake of an electric vehicle is the actuator of the rear wheel brake system and is divided into the following types according to the driving mode:

[0003] Single piston type, such as the disclosure (announcement) number: CN210235158U, disclosure (announcement) date: 2020-04-03, a smart hub brake lock is disclosed.

[0004] Double-piston type, such as the publication (announcement) number: CN218041069U, the publication (announcement) date: 2022-12-13, a hub motor with a braking function is disclosed.

[0005] In the prior art including the above-mentioned patent, the core actuator of the brake is the shoe, which is driven by a single piston or double piston to move relative to another shoe, or both shoes move simultaneously. This piston makes the shoe move, and this piston design is prone to floating dust, which causes a delay in driving the shoe. Utility Model Content

[0006] The utility model aims to provide an electric vehicle hub brake to solve the above problems.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An electric vehicle hub brake comprises a brake housing, one side of the brake housing is a brake compartment, and the opposite side is an outer facing surface;

[0009] It also includes symmetrically arranged shoe blocks, the first ends of which are rotatably connected to shoe pins fixedly installed in the brake compartment;

[0010] It also includes a transmission member that is driven to rotate so as to drive the distance between the second ends of the two shoe blocks to be adjustable;

[0011] A gear is rotatably provided on the second end of the shoe through a pin;

[0012] The transmission member is a gear transmission shaft, and the gear and the gear transmission shaft are meshed for transmission.

[0013] Preferably, symmetrically arranged springs are provided between the two shoes, and in a default state of the springs, the second ends of the shoes are abutted against a transmission member rotatably arranged in the brake compartment.

[0014] Preferably, the gear transmission shaft comprises a special-shaped gear, which is an elliptical structure and is divided into a narrow end and a wide end according to the elliptical structure, and the narrow end is provided with a recessed portion protruding toward the axis;

[0015] The wide end of the gear transmission shaft in the default state is meshed with two gears.

[0016] Preferably, it also includes a rocker arm rotatably arranged on the outer surface of the brake housing, wherein the first end of the rocker arm is inserted into one end of the gear transmission shaft extending to the outer surface and is fixed by a locking bolt assembled on the first end of the rocker arm.

[0017] Preferably, the locking bolt consists of a tightening screw and a nut.

[0018] In the above technical scheme, the utility model provides an electric vehicle hub brake, which has the following beneficial effects: the gear transmission shaft and gear meshing are used as the core driving source for separating and approaching the clamp of the two shoe blocks, and the two shoe blocks are stretched open by gear linkage, so the friction resistance is small, the service life of the core driving source is long, and the handlebar braking stroke is short, which is 35% less than the braking stroke of the ordinary brake handle.

[0019] Moreover, compared with gear transmission and piston, the braking sensitivity is higher, and the braking effect is comparable to disc brakes.

[0020] And because of the use of a gear linkage structure, the gear transmission shaft and gears will not get stuck due to dust after long-term use, thereby increasing braking safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the structure inside the gear compartment provided by an embodiment of the utility model;

[0023] Figure 2 A schematic structural diagram of a rocker arm and a gear transmission shaft provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Brake housing; 2. Shoe; 3. Rocker arm; 4. Shoe pin; 5. Spring; 6. Pin; 7. Gear; 8. Gear drive shaft; 9. Nut; 10. Tightening screw. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1-2 As shown, an electric vehicle hub brake comprises a brake housing 1, one side of the brake housing 1 is a brake compartment, and the opposite side is an outer facing surface;

[0028] A shoe pin 4 is fixedly installed in the brake compartment, and the first ends of the two shoe blocks 2 are rotatably arranged on the shoe pin 4, thereby forming a rotation.

[0029] By using the symmetrically arranged springs 5 ​​between the two shoe blocks 2, the second ends of the shoe blocks 2 are fitted onto the transmission member rotatably arranged in the brake cabin.

[0030] The transmission member in the embodiment is a gear transmission shaft 8, combined with Figure 1 It can be seen that the gear transmission shaft 8 includes a special-shaped gear, which is an elliptical structure and is divided into a narrow end and a wide end according to the elliptical structure, and a concave portion convex toward the axis is provided on the narrow end;

[0031] The wide end of the gear transmission shaft 8 in the default state is meshed with the two gears 7 .

[0032] The gear 7 is rotated on the second end of the shoe 2 through the pin 6 .

[0033] Therefore, when the gear 7 is located in the recessed portion, the two shoes 2 clamp together to perform braking, and when the wide ends are engaged with the two gears 7, the two shoes 2 separate to terminate the braking.

[0034] In the above technology, the meshing of the gear transmission shaft 8 and the gear 7 is used as the core driving source for separating and approaching the two shoe blocks 2, and the gears are used to open them, so the friction resistance is small, the service life of the core driving source is long, and the handlebar braking stroke is short, which is 35% less than the braking stroke of the ordinary brake handle.

[0035] Compared with the piston, the gear transmission has a higher braking sensitivity, and the braking effect is comparable to that of the disc brake.

[0036] Furthermore, due to the use of a gear linkage structure, the gear transmission shaft 8 and the gear 7 will not be stuck due to dust during long-term use, thereby increasing braking safety.

[0037] As an embodiment further provided by the present invention, a rocker arm 3 is rotatably provided on the outer surface of the vehicle shell 1, and the first end of the rocker arm 3 is plugged into one end of the gear transmission shaft 8 extending to the outer surface, and is fixed by a locking bolt assembled on the first end of the rocker arm 3. The screw rod 4 and the nut 10 are composed.

[0038] When the rocker arm 3 is squeezed by the handle, the gear transmission shaft 8 rotates, so that when the gear 7 is located in the recessed part, the two shoe blocks 2 clamp and brake. When the handle is released, the rocker arm 3 is reset, and when the wide end is meshed with the two gears 7, the two shoe blocks 2 separate and stop braking.

[0039] The rocker arm 3 in the embodiment can be driven by a restoring mechanism known to those skilled in the art, such as a blocking spring or a torsion spring.

[0040] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electric vehicle hub brake, characterized in that: It comprises a brake housing (1), wherein one side of the brake housing (1) is a brake compartment, and the opposite side is an exterior facing surface; It also includes symmetrically arranged shoe blocks (2), a first end of which is rotatably connected to a shoe pin (4) fixedly installed in the brake compartment; It also includes a transmission member that is driven to rotate so as to drive the distance between the second ends of the two shoe blocks (2) to be adjustable; A gear (7) is rotatably provided on the second end of the shoe (2) via a pin (6); The transmission member is a gear transmission shaft (8), and the gear (7) and the gear transmission shaft (8) are meshed for transmission.

2. An electric vehicle hub brake according to claim 1, characterized in that: A symmetrically arranged spring (5) is provided between the two shoe blocks (2); in a default state, the spring (5) causes the second end of the shoe block (2) to fit onto a transmission member rotatably arranged in the brake compartment.

3. The electric vehicle hub brake according to claim 2, characterized in that: The gear transmission shaft (8) comprises a special-shaped gear, the special-shaped gear is an elliptical structure, and is divided into a narrow end and a wide end according to the elliptical structure, and the narrow end is provided with a recessed portion protruding toward the axis; In a default state, the wide end of the gear transmission shaft (8) is meshed with two gears (7).

4. The electric vehicle hub brake according to claim 2, characterized in that: It also includes a rocker arm (3) rotatably arranged on the outer surface of the brake housing (1), wherein the first end of the rocker arm (3) is plugged into an end of a gear transmission shaft (8) extending to the outer surface and is fixed by a locking bolt assembled on the first end of the rocker arm (3).

5. The electric vehicle hub brake according to claim 4, characterized in that: The locking bolt is composed of a tightening screw rod (10) and a nut (9).

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