Brake cable assembly of electric vehicle

Abstract

The invention relates to the technical field of brake cables, and particularly discloses an electric vehicle brake cable assembly which comprises a cable body and an outer sleeve arranged on the cable body in a penetrating mode, a buckle connecting piece is arranged at the end of the cable body, and an adjusting mechanism for adjusting a brake abrasion gap is arranged at one end of the outer sleeve. The adjusting mechanism comprises an adjusting pipe arranged at one end of the outer sleeve, an adjusting screw and an adjusting nut, the adjusting screw and the adjusting nut are adaptively arranged at one end, away from the outer sleeve, of the adjusting pipe in a penetrating mode, the end face of one side of the adjusting nut abuts against the end face of the adjusting pipe, and a penetrating hole matched with the stay wire body is formed in the adjusting screw. And the distance between the adjusting screw and the adjusting pipe is adjusted to compensate the abrasion clearance of the brake caused by braking. The problems that in the prior art, a large operation space is needed for installation and adjustment of a brake cable, and a built-in rocker arm brake with the limited installation and adjustment space is not suitable are solved.

Description

Technical Field

[0001] The invention relates to the technical field of brake cables, and in particular to an electric vehicle brake cable assembly. Background Art

[0002] In order to improve the braking efficiency of electric bicycles and their safety during riding, drum brakes are currently commonly used on electric bicycles. The brake line is mainly used as a connecting line between the brake handle of the electric bicycle and the brake rocker arm. The brake handle is pressed and the brake line is used to connect the rocker arm to control the opening and closing of the drum brake shoe to brake the wheel hub of the electric bicycle, thereby stopping the bicycle.

[0003] During the long-term use of existing brakes, the brake line will become loose due to long-term brake wear, which will cause the brakes to fail when people brake. Usually, special tools are needed to tighten and adjust the relative length of the brake line inner core on the brake rocker arm to reduce the slack and obtain a good braking effect. For example, CN216611469U discloses an electric vehicle brake line, which adjusts the brake clearance by adjusting the threaded connection between the threaded rod and the brake rocker arm. This structure is an improvement over the existing technology and can be adjusted without special tools.

[0004] However, the above two brake line adjustment and tightening methods both require a large adjustment installation space, which is only suitable for brake structures with external rocker arms. For brakes with built-in rocker arms with smaller installation adjustment space, this traditional brake structure is inconvenient to install and adjust. Summary of the invention

[0005] The present invention solves the problem in the prior art that the installation and adjustment of the brake line requires a large operating space and is not suitable for the built-in rocker arm brake with limited installation and adjustment space.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions.

[0007] The invention is an electric vehicle brake cable assembly, including a cable body and an outer sleeve inserted thereon, a snap connector is provided at the end of the cable body, and an adjustment mechanism for adjusting the brake wear gap is provided at one end of the outer sleeve, and the adjustment mechanism includes: an adjustment tube arranged at one end of the outer sleeve, an adjustment screw and an adjustment nut adapted to be inserted in the end of the adjustment tube away from the outer sleeve, one end face of the adjustment nut abuts against the end face of the adjustment tube, and a through hole adapted for the cable body is provided on the adjusting screw, and the distance of the adjusting screw relative to the adjusting tube is adjusted to compensate for the wear gap formed by the brake due to braking.

[0008] A further improvement is that a positioning sleeve is provided between the outer sleeve and the adjusting tube, a stepped through hole is provided inside the positioning sleeve to fit and position the outer sleeve, the outer side of the outer sleeve fits and nests in the adjusting tube, and an external convex shoulder is provided at one end of the outer sleeve to abut against one end of the adjusting tube.

[0009] A further improvement is that: the outer side of the positioning sleeve is also provided with a cutout communicated with the step through hole.

[0010] A further improvement is that: the end of the adjusting screw away from the adjusting tube is also provided with a positioning part adapted to the brake, the inner side of the positioning part is provided with a limiting boss, and the outer side of the adjusting screw is provided with an open groove communicating with the penetration hole.

[0011] A further improvement is that the adjusting screw is provided with two adjusting nuts.

[0012] A further improvement is that the pull wire body is configured as a pull wire front part and a pull wire rear part structure, which are connected by a connecting structure and are slidably embedded in the adjustment tube.

[0013] A further improvement is that the connecting structure is composed of connecting blocks symmetrically arranged at the front and rear connecting ends of the pull wire, one end of the connecting block is provided with a small-diameter connecting end fixedly connected to the front or rear end of the pull wire, and the other end is provided with a large-diameter connecting end of a semi-circular arc structure, and the large-diameter connecting end is provided with a radial connecting hole. The two large-diameter connecting ends of the semi-circular arc structure connected to the front or rear of the pull wire are combined into a cylindrical structure by pins.

[0014] Further improvements are: a brake including an electric vehicle brake cable assembly, also including a brake housing, the housing is provided with a rocker arm and a brake cable fixing structure for driving the brake assembly to brake, the rocker arm is built into the brake housing and the brake shoe, the outer end of the rocker arm is provided with a slot adapted to the snap connector, and the brake cable fixing structure is adapted to the positioning portion at one end of the adjusting screw.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides snap connectors at both ends of the brake cable body, which are directly snap-connected with the brake handle and the brake rocker arm during installation. Assembly and disassembly are convenient and quick, and can be completed without too much operating space. After long-term use of the brake, the brake cable will become loose due to the gap caused by brake wear. It is only necessary to adjust the adjusting screw in the adjusting mechanism at one end of the outer sleeve outward, thereby extending the distance between the outer sleeve, the adjusting tube and the adjusting screw relative to the cable body to compensate for the brake wear gap, thereby overcoming the need to improve the braking effect by tightening the brake cable body and reducing the movement stroke of the brake handle. The brake gap adjustment of the present invention is simple and convenient, and can be achieved without special tools. There are no special requirements for the rocker arm, the brake and the brake handle, and the applicability is good. It is particularly suitable for brakes with built-in rocker arms that are inconvenient to adjust and have limited adjustment space. At the same time, the cable body will not be damaged during tightening, thereby extending the service life of the cable.

[0016] The setting of the connecting structure can assist in pre-adjustment and limit buffering of the brake. During pre-adjustment, the brake handle is completely loosened to make it in a free state, the adjusting screw is tightened and pushed inward to the connecting structure, driving the cable body as a whole to move toward one end of the outer sleeve relative to the adjusting tube, so that the cable body connected to the brake handle and the brake rocker arm is in a free state. When the brake handle is squeezed for braking, the cable body drives the connecting structure to move toward the end of the brake handle, and an effective braking distance is formed between the connecting structure and the end of the adjusting screw. When the brake handle is loosened, the cable body drives the connecting structure It is reset together and abuts against the end of the adjusting screw, and plays a buffering role on the brake rocker arm connection; the connecting block in the connecting structure is provided with a large-diameter connecting end 1 whose diameter is smaller than the inner hole diameter of the adjusting tube, and the large-diameter connecting end is provided with a radial connecting hole, which is connected by pins to form a cylindrical structure and slidably embedded in the adjusting tube. The connection is reliable and stable, and it is easy to assemble and disassemble. For brake systems with different installation distances of different vehicle models, it is only necessary to equip the front and rear ends of the cables with different lengths. There is no need to customize cable bodies of various lengths and specifications, which reduces the production preparation cost and improves the overall adaptability of the brake line.

[0017] A positioning sleeve is arranged at the connection between the outer sleeve and the adjusting tube to play the role of reducing diameter and limiting connection and supporting the adjusting tube; a cutout communicating with the step through hole is arranged on the outer side of the positioning sleeve, so that the positioning sleeve has elastic contraction space, which is convenient for installation and connection operation and increases the connection stability between the outer sleeve and the adjusting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the explosion structure of the present invention.

[0020] Figure 3 It is a cross-sectional view of the present invention.

[0021] Figure 4 It is a structural schematic diagram of another embodiment of the connection structure of the invention.

[0022] Figure 5 It is a schematic diagram of the installation structure of the invention.

[0023] Figure ID: Cable body 1, snap connector 11, connecting block 12, small diameter connecting end 121, large diameter connecting end 122, radial connecting hole 123, externally protruding connecting pin 124, pin 13, adjusting tube 2, outer sleeve 3, positioning sleeve 4, adjusting screw 5, adjusting nut 6, stepped through hole 41, externally protruding shoulder 42, cutout 43, insertion hole 51, positioning portion 52, limiting boss 53, opening groove 54, brake housing 7, rocker arm 71, brake cable fixing structure 72. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "center", "up", "down", "front", "back", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the combination or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0026] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1-3 As shown, an embodiment is given: A brake cable assembly for an electric vehicle comprises a cable body 1 and an outer sleeve 3 passed through the cable body 1, a snap connector 11 is provided at the end of the cable body 1, and an adjustment mechanism for adjusting the brake wear clearance is provided at one end of the outer sleeve 3, the adjustment mechanism comprises: an adjustment tube 2 arranged at one end of the outer sleeve 3, an adjustment screw 5 and an adjustment nut 6 adapted to be passed through the end of the adjustment tube 2 away from the outer sleeve 3, one end face of the adjustment nut 6 abuts against the end face of the adjustment tube 2, a through hole adapted to the cable body 1 is provided on the adjustment screw 5, and the distance between the adjustment screw 5 and the adjustment tube 2 is adjusted to compensate for the wear clearance formed by the brake due to braking; a positioning sleeve 4 is provided between the outer sleeve 3 and the adjustment tube 2, a step through hole 41 is provided in the positioning sleeve 4 to adapt and position with the outer sleeve 3, the outer side of the outer sleeve 3 is adapted to be nested in the adjustment tube 2, and an external convex shaft shoulder 42 is provided at one end of the outer sleeve 3 to abut against one end of the adjustment tube 2; the present invention achieves this by arranging snap connectors at both ends of the brake cable body 1. The buckle connector 11 is directly snap-connected with the brake handle and the brake rocker arm during installation. Disassembly and assembly are convenient and quick, and can be completed without too much operating space. After long-term use of the brake, the brake line will become loose due to the gap caused by brake wear. It is only necessary to adjust the adjusting screw 5 in the adjusting mechanism at one end of the outer sleeve 3 outward, and adjust the distance between the extended outer sleeve 3, the adjusting tube 2 and the adjusting screw 5 relative to the pull wire body 1 to compensate for the wear gap of the brake brake, thereby overcoming the need to improve the braking effect by tightening the brake wire body 1 to reduce the movement stroke of the brake handle; thereby making the brake clearance adjustment simple and convenient, and can be achieved without special tools, and there are no special requirements for the rocker arm, brake and brake handle, and it has good applicability; it is particularly suitable for brakes with built-in rocker arms that are inconvenient to adjust and have limited adjustment space; the setting of the positioning sleeve 4 has the function of reducing the diameter connection and supporting the adjusting tube 2.

[0027] An optional implementation method: Figure 2 , 3 As shown, the outer side of the positioning sleeve 4 is also provided with a cutout 43 which is communicated with the step through hole 41 ; the setting of the cutout 43 provides the positioning sleeve 4 with an elastic contraction space, facilitates the installation and connection operation, and increases the connection stability between the outer sleeve 3 and the adjusting tube 2 .

[0028] An optional implementation method: Figure 2 , 3As shown, the end of the adjusting screw 5 away from the adjusting tube 2 is also provided with a positioning portion 52 adapted to the brake, the inner side of the positioning portion 52 is provided with a limiting boss 53, and the outer side of the adjusting screw 5 is provided with an opening slot 54 communicating with the through-hole 51; the adjusting screw 5 is provided with two adjusting nuts 6. The setting of the opening slot 54 communicating with the through-hole 51 as above facilitates the installation of the cable pulling body 1, and the setting of the two adjusting nuts 6, one of which abuts against the end surface of the adjusting tube 2 to play a role of tightening and limiting, and the other is used to adjust the extension of the adjusting screw 5, which can be set in the middle or on the side of the limiting boss 53, and at the same time plays a role of tightening and blocking the cable pulling body 1 for the opening slot 54.

[0029] An optional implementation method: Figure 2 , 3 As shown, the wire pull body 1 is configured as a wire pull front and wire pull rear separate structures, which are connected by a connecting structure and slidably embedded in the adjusting tube 2; the connecting structure is composed of connecting blocks 12 symmetrically arranged at the connecting ends of the wire pull front and wire pull rear, and one end of the connecting block 12 is provided with a small-diameter connecting end 121 which can be fixedly connected to the wire pull front or wire pull rear end by welding or riveting, and the other end is provided with a large-diameter connecting end 122 of a semi-circular arc structure, and the large-diameter connecting end 122 is provided with a radial connecting hole, and the large-diameter connecting ends 122 of the two semi-circular arc structures connected to the wire pull front or wire pull rear are combined into a cylindrical structure by a pin 13. The setting of the split structure as above reduces the process requirements of the cable body 1 and is easy to maintain without the need for overall replacement; the connection structure setting can assist in pre-adjustment and limit buffering of the brake. During the pre-adjustment, the brake handle is completely loosened, and the adjusting screw 5 is tightened and pushed inward to the connection structure, driving the cable body 1 as a whole to move toward one end of the outer sleeve 3 relative to the adjusting tube 2, so that the cable body 1 connected to the brake handle and the brake rocker arm is in a normal tensioned state. When the brake handle is squeezed for braking, the cable body 1 drives the connection structure to move toward the handle end, and an effective braking distance is formed between the connection structure and the end of the adjusting screw 5. When the brake handle is loosened, the cable body 1 drives the connection structure to reset and abut against the end of the adjusting screw to play a buffering role on the connection of the brake rocker arm. The diameter of the large-diameter connecting end 122 is smaller than the inner hole diameter of the adjusting tube 2. A radial connecting hole 123 is provided on the large-diameter connecting end 122, which is connected by a pin 13 to form a cylindrical structure and is slidably embedded in the adjusting tube 2. The connection is reliable and stable, and the assembly and disassembly are convenient. For brake systems with different installation distances of different vehicle models, it is only necessary to equip the front and rear ends of the cable with different lengths. There is no need to customize cable bodies of various lengths and specifications, which reduces the material preparation cost and improves the overall adaptability of the brake line.

[0030] like Figure 4In another embodiment of the connection structure shown, a radial connection hole 123 and an outwardly protruding connection pin 124 are provided on one side of the plane of the semi-circular arc structure of the large diameter connection end 122 of the semi-circular arc structure. The connection holes and the outwardly protruding connection pins on the planes of the two semi-circular arc structures are relatively adapted and embedded to achieve the above-mentioned connection effect.

[0031] like Figure 5 As shown, a brake including an electric vehicle brake line assembly also includes a brake housing 7, on which a rocker arm 71 for driving the brake assembly to brake and a brake line fixing structure 72 are provided, the rocker arm 71 is built into the brake housing and the brake shoe, and a slot adapted to the snap connector 11 is provided at the outer end of the rocker arm 71, and the brake line fixing structure 72 is adapted to the positioning portion 52 at one end of the adjusting screw 5; when installing, it is directly snap-connected with the brake handle and the brake rocker arm, and disassembly and assembly are convenient and quick, and can be completed without too much operating space; at the same time, when eliminating the gap formed by long-term braking, it is easy to achieve by simply rotating the adjusting screw 5 outward, and no special tools are needed to tighten the cable body 1, and the cable body will not be damaged during tightening, thereby extending the service life of the cable. At the same time, it is also applicable to brakes with other external rocker arms such as a rocker arm with a slot adapted to the snap connector 11 and a brake housing with a brake line fixing structure 72.

[0032] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An electric vehicle brake cable assembly, comprising a cable body (1) and an outer sleeve (3) passing therethrough, characterized in that: The end of the cable body (1) is provided with a snap connector (11), and one end of the outer sleeve (3) is provided with an adjustment mechanism for adjusting the brake wear clearance, the adjustment mechanism comprising: an adjustment tube (2) arranged at one end of the outer sleeve (3), an adjustment screw (5) and an adjustment nut (6) adapted to be inserted through the end of the adjustment tube (2) away from the outer sleeve (3), one end face of the adjustment nut (6) abutting against the end face of the adjustment tube (2), and a through hole (51) adapted to the cable body (1) is provided on the adjustment screw (5), and the distance between the adjustment screw (5) and the adjustment tube (2) is adjusted to compensate for the wear clearance of the brake caused by braking.

2. The electric vehicle brake cable assembly according to claim 1, characterized in that: A positioning sleeve (4) is provided between the outer sleeve (3) and the adjusting tube (2); a stepped through hole (41) is provided inside the positioning sleeve (4) to fit and position with the outer sleeve (3); the outer side of the outer sleeve (3) fits and nests in the adjusting tube (2); and an outer convex shaft shoulder (42) is provided on one end of the outer sleeve (3) to abut against one end of the adjusting tube (2).

3. The electric vehicle brake cable assembly according to claim 2, characterized in that: The outer side of the positioning sleeve (4) is also provided with a cutout (43) which is in communication with the step through hole (41).

4. The electric vehicle brake cable assembly according to claim 1, characterized in that: The end of the adjusting screw (5) away from the adjusting tube (2) is also provided with a positioning portion (52) adapted to the brake, the inner side of the positioning portion (52) is provided with a limiting boss (53), and the outer side of the adjusting screw (5) is provided with an opening groove (54) communicating with the insertion hole (51).

5. The electric vehicle brake cable assembly according to claim 1, characterized in that: The adjusting screw (5) is provided with two adjusting nuts (6).

6. The electric vehicle brake cable assembly according to claim 1, characterized in that: The pull wire body (1) is provided as a pull wire front part and a pull wire rear part structure, which are connected by a connecting structure and are slidably embedded in the adjustment tube (2).

7. An electric vehicle brake cable assembly according to claim 6, characterized in that: The connection structure is composed of connection blocks (12) symmetrically arranged at the front and rear connection ends of the pull wire, one end of the connection block (12) is provided with a small-diameter connection end (121) fixedly connected to the front or rear end of the pull wire, and the other end is provided with a large-diameter connection end (122) of a semi-circular arc structure, and the large-diameter connection end (122) is provided with a radial connection hole (123). The two large-diameter connection ends (122) of the semi-circular arc structure connected to the front or rear of the pull wire are combined into a cylindrical structure through a pin (13).

8. A brake comprising the electric vehicle brake cable assembly according to any one of claims 1 to 7, characterized in that: It also comprises a brake housing (7), the housing (7) being provided with a rocker arm (71) for driving the brake assembly to brake and a brake wire fixing structure (72), the rocker arm (71) being built into the brake housing and the brake shoe, the outer end of the rocker arm (71) being provided with a slot adapted to the buckle connector (11), and the brake wire fixing structure (72) being adapted to a positioning portion (52) at one end of the adjusting screw (5).

Images