CN219954040U

CN219954040U - Enclosed hub brake

Info

Publication number: CN219954040U
Application number: CN202321223343.5U
Authority: CN
Inventors: 唐有民; 丁刚; 杨生建; 陈远东
Original assignee: Taizhou Youmin Traffic Equipment Co ltd
Current assignee: Taizhou Youmin Traffic Equipment Co ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-11-03
Anticipated expiration: 2033-05-19

Abstract

The utility model relates to the technical field of brakes, and discloses a closed hub brake which comprises a brake box assembly, brake shoes, a cam shaft and a rocker arm, wherein the brake shoes are symmetrically arranged on a fixed mandrel and a rotating shaft hole on the inner side of the brake box assembly; the problem that water and sediment easily enter the brake to influence the braking performance due to the fact that an existing hub brake rocker arm mechanism is completely exposed outside is solved; meanwhile, one end of the rocker arm is provided with a brake wear indication structure, and a wear indication mark and an observation window are respectively arranged in the rocker arm cavity and on the cover plate and correspondingly adapted to the wear indication structure; the wear state of the brake shoes can be known in time, and the brake shoes can be replaced in time to avoid damage to the brake and threat to the safety of a user.

Description

Enclosed hub brake

Technical Field

The utility model relates to the technical field of brakes, in particular to a closed hub brake.

Background

The hub brake is simple in structure, safe and reliable in braking performance, and is increasingly applied to motorcycles and electric vehicles as an important part of safe braking.

At present, a common hub brake, such as a brake of CN201647041U, is provided with a cam rocker arm assembly and a brake cable strut at the outer side of a drum cover, wherein a rocker arm of the cam rocker arm assembly is fixedly connected with a cam through a rotating shaft, and a torsion spring capable of enabling the cam to rotate is arranged between the rocker arm and the drum cover; the rocker arm connected with the brake cable and the cam shaft matched with the rocker arm are usually arranged outside the brake, because the rocker arm extends to the outside of the brake shell through the worn cam shaft, a large gap exists between the rocker arm and the cam shaft and the brake shell, when a vehicle runs in rainy and snowy weather or in a muddy road, impurities such as rainwater, muddy sand and the like are easily caused to enter the inside of the brake, so that rust, abrasion and clamping stagnation are caused to internal components of the brake, the brake performance is affected, the brake is easily damaged, and a rider in the abrasion state of a brake shoe of the existing brake is difficult to know in time, so that the safety of the user is threatened.

For this reason, there is a need for a hub brake that is flexible, safe and of a closed construction to solve the above-mentioned problems.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a closed hub brake, which solves the problems that the existing hub brake rocker arm mechanism is completely exposed outside, water and sediment easily enter the brake to influence the braking performance, the abrasion state of a brake shoe cannot be known in time, the brake is easily damaged, the safety of a user is threatened and the like; in order to achieve the above object, the present utility model adopts the following technical scheme.

The utility model relates to a closed hub brake, which comprises a brake box assembly, a brake shoe, a cam shaft and a rocker arm, wherein the brake shoe is symmetrically arranged on a fixed mandrel and a rotating shaft hole on the inner side of the brake box assembly, the cam shaft is arranged in the rotating shaft hole, one end of the cam shaft is clamped at the opening and closing end of the brake shoe, the other end of the cam shaft and the rocker arm are detachably connected in a rocker arm cavity on the outer side of the brake box assembly, one side of the rocker arm cavity is provided with a brake wire through hole, a cover plate is arranged on the rocker arm cavity to form a closed rocker arm structure,

the further improvement is that: the center position of the brake box assembly is provided with a motor center shaft hole, the fixed core shaft and the rotating shaft hole are symmetrically arranged on two sides of the center shaft hole, one side, close to the rotating shaft hole, of the outer side of the brake box assembly is provided with an epitaxial upward protruding frame limiting structure, and the rocker arm cavity is protruding from the outer side face of the brake box assembly, is arranged between the frame limiting structure and the center shaft hole and surrounds the rotating shaft hole.

The further improvement is that: the frame limit structure is arranged on one side of the brake line through hole in parallel, and the other side of the frame limit structure is also provided with a reinforcing rib structure.

The further improvement is that: the bottom of the rocker arm cavity is provided with a rocker arm reset mounting structure which is connected with the rocker arm through a reset spring and enables the rocker arm to have a reset trend.

The further improvement is that: the rocker arm cavity is internally provided with a buckling groove and a plurality of boss mounting holes which are connected with the cover plate in an adaptive manner.

The further improvement is that: one end of the cam shaft is provided with a cam part which is matched with the brake shoe, and the other end of the cam shaft is provided with an annular groove and an end face limiting groove which are fixedly connected with the rocker arm through a limiting clamp spring.

The further improvement is that: the rocker arm one end is equipped with wear indication structure, be equipped with wear indication sign and observation window and wear indication structure adaptation respectively on the rocker arm intracavity, the apron, the observation window is established to arc structure.

The further improvement is that: the rocker arm is further provided with a brake wire connecting portion, a cam shaft mounting hole and a spring connecting hole, the brake wire connecting portion is arranged at the other end of the rocker arm and is matched with the end portion of the brake wire, the cam shaft mounting hole is arranged between the brake wire connecting portion and the wear indication structure and is connected with the cam shaft in a matched mode, the wear indication structure is arranged on one side of the cam shaft mounting hole and indicates outwards, and the spring connecting hole is arranged on the wear indication structure.

The further improvement is that: the brake box assembly is of an aluminum alloy or reinforced plastic integrated structure, and a multistage annular waterproof step structure is further arranged on the inner side of the brake box assembly.

Compared with the prior art, the utility model has the following beneficial effects:

1. the rocker arm is connected in a rocker arm cavity at the outer side of the brake box assembly, and the rocker arm cavity is provided with a cover plate to form a closed rocker arm structure, so that parts such as a brake rocker arm and the like are not exposed, and the built-in rocker arm cavity is hidden outside the brake box assembly, so that closed protection is realized, corrosion of water and sand on brake shoes in the brake is effectively prevented, the running safety of a vehicle is ensured, and the whole service life and the braking effect of the brake are improved;

2. meanwhile, the closed rocker arm cavity arranged on the outer side of the brake box assembly effectively ensures that the brake activity space of the rocker arm and loading are not interfered and influenced;

3. the annular groove and the end face limiting groove are formed in one end of the cam shaft and fixedly connected with the rocker arm, the cam shaft is connected with the end face limiting groove and the rocker arm in an adapting way, a polygonal structure and a threaded connection end or a hobbing adapting structure are not required to be arranged on the outer side of the cam shaft, meanwhile, the manufacturing, mounting and material cost of the cam shaft and the rocker arm are reduced, the connection is firm and reliable, the generation of sliding teeth is prevented, the influence of gaps on the transmission efficiency is reduced, the transmission effect between the built-in rocker arm and the cam shaft is ensured, the braking effect is further ensured, and meanwhile, the height space of a rocker arm cavity is effectively compressed;

4. the rocker arm is provided with a wear indication structure which is matched with a wear indication mark in the rocker arm cavity, and the limit position state of the rocker arm pointer after the shoe block is used for a long time can be observed through the observation window arranged on the cover plate, and a new shoe block can be timely replaced; the abrasion state of the current brake shoe is known in time by a user, unsafe factors are reduced, and the safe and reliable use of the brake is improved.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic diagram of an explosive structure according to the present utility model.

FIG. 3 is a schematic cross-sectional view of the present utility model.

Fig. 4 is a schematic view of the rocker arm installation of the present utility model.

Fig. 5 is a schematic perspective view of a shutter box assembly according to the present utility model.

Fig. 6 is a schematic perspective view of a rocker arm according to the present utility model.

The attached drawings are identified:

the brake box assembly 1, the motor shaft hole 11, the centering shaft 12, the rotating shaft hole 13, the frame limiting structure 14, the rocker arm cavity 15, the annular waterproof step structure 16, the brake wire through hole 151, the wear indication mark 152, the rocker arm reset mounting structure 153, the boss mounting hole 154, the brake shoe 2, the cam shaft 3, the cam part 31, the annular groove 32, the end face limiting groove 33, the rocker arm 4, the wear indication structure 41, the brake wire connecting part 42, the cam shaft mounting hole 43 and the spring connecting hole 44, the cover plate 6, the observation window 61, the limiting clamp spring 5 and the reset spring 7.

Detailed Description

In order to enhance the understanding of the present utility model, the present utility model will be described in further detail with reference to the drawings, and the present embodiment is only for explaining the present utility model and is not limited to the protection scope of the present utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the indicated combinations or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The utility model is described in further detail below with reference to the attached drawings and examples:

the closed hub brake according to an embodiment shown in fig. 1-6 comprises a brake box assembly 1, a brake shoe 2, a cam shaft 3 and a rocker arm 4, wherein the brake shoe 2 is symmetrically arranged on a fixed mandrel 12 and a rotating shaft hole 13 on the inner side of the brake box assembly 1, the cam shaft 3 is arranged in the rotating shaft hole 13, one end of the cam shaft 3 is clamped at the opening and closing end of the brake shoe 2, the other end of the cam shaft 3 and the rocker arm 4 are detachably connected in a rocker arm cavity 15 on the outer side of the brake box assembly 1, a brake wire through hole 151 is arranged on one side of the rocker arm cavity 15, a cover plate 6 is arranged on the rocker arm cavity 15 to form a closed rocker arm structure, the rocker arm 4 is connected in the rocker arm cavity 15 on the outer side of the brake box assembly 1, the cover plate 6 is arranged on the rocker arm cavity 15 to form a closed rocker arm structure, the brake rocker arm is not exposed, a moving part is hidden in the brake box assembly, the closed protection is realized, the erosion of the moving part caused by water and sand dust is prevented, the key part is not exposed to the outside, the safety of a vehicle is ensured, the whole service life of the brake is prolonged, and the braking effect is improved.

More preferably: as shown in fig. 2, 4, 5: the center of the brake box assembly 1 is provided with a motor center shaft hole 11, a fixed mandrel 12 and a rotating shaft hole 13 are symmetrically arranged at two sides of the center shaft hole 11, one side, close to the rotating shaft hole 13, of the outside of the brake box assembly 1 is provided with an epitaxial upward protruding frame limiting structure 14, and a rocker arm cavity 15 is arranged on the outer side surface of the brake box assembly 1 in an upward protruding manner, is positioned between the frame limiting structure 14 and the center shaft hole 11 and surrounds the rotating shaft hole 13; the rocker arm cavity 15 with the structure ensures that the rocker arm can be built in the rocker arm cavity and is not exposed; the height of the specific rocker arm cavity 15 is lower than the heights of the frame limiting structure 14 and the middle shaft sleeve, and the frame limiting structure 14 and the middle shaft hole 11 are arranged in a semi-surrounding manner, so that the braking activity space of the rocker arm 4 is ensured, and loading is not interfered and influenced; the frame limit structure 14 is arranged on one side of the brake line through hole 151 in parallel, a reinforcing rib structure is further arranged on the other side of the frame limit structure 14, smooth brake pulling and installation strength of the frame limit structure 14 are guaranteed, and a frame limit groove is formed in the frame limit structure 14.

More preferably: a clamping groove and a plurality of boss mounting holes 154 are arranged in the rocker arm cavity 15 and are connected with the cover plate 6 in an adaptive manner. The rocker arm cavity 15 is fixedly sealed, firm and reliable in connection with the cover plate 6 due to the arrangement of the clamping grooves and the boss mounting holes 154, and the installation and the disassembly are convenient; the observation window 61 is made of transparent waterproof material, and has a simple and attractive structure.

More preferred example 2: as shown in fig. 4 and 5: the bottom of the rocker arm cavity 15 is provided with a rocker arm reset mounting structure 153 which is connected with the rocker arm 4 through a reset spring 7 and enables the rocker arm to have a reset trend. The rocker arm reset mounting structure 153 can be a threaded through hole, at the moment, a tension spring anti-drop screw is connected in the threaded through hole in a threaded manner, one end of a reset spring is hooked on the tension spring anti-drop screw, and the other end of the reset spring is mounted in a spring mounting hole on the wear indication structure at one end of the rocker arm; in addition, the reset spring can also be a reset torsion spring, one end of the torsion spring is arranged in the threaded through hole in a penetrating way, and the other end of the torsion spring is arranged on the rocker arm, so that the rocker arm can be reset more quickly and reliably; other structures are the same as in embodiment 1.

More preferred example 3: as shown in fig. 2, 3 and 4, one end of the cam shaft 3 is provided with a cam part 31 which is matched with the brake shoe 2, and the other end is provided with an annular groove 32 and an end surface limiting groove 33 which are fixedly connected with the rocker arm 4 through a limiting clamp spring 5; the camshaft and the rocking arm adaptation of this structure are connected, need not set up polygonal structure in the camshaft outside and add threaded connection end or gear hobbing adaptation structure, have reduced manufacturing cost and the installation cost of camshaft and rocking arm, firm in connection is reliable, prevents the production of smooth tooth, has still effectively compressed the altitude space in rocking arm chamber simultaneously, other structures are with embodiment 1 and or 2.

More preferred example 3: as shown in fig. 2, 4 and 6, other structures are the same as those of embodiments 1, 2 and 3, one end of the rocker arm 4 is provided with a wear indication structure 41, the rocker arm cavity 15 is provided with a wear indication mark 152, the cover plate 6 is provided with an observation window 61, and the wear indication structure 41 is correspondingly adapted to the wear indication mark 152 and the observation window 61; the observation window 61 is provided with an arc-shaped structure; the rocker arm 4 is provided with a brake wire connecting part 42, a cam shaft mounting hole 43 and a spring connecting hole 44, the brake wire connecting part 42 is arranged at the other end of the rocker arm 4 and is matched with the end part of the brake wire, the cam shaft mounting hole 43 is arranged between the brake wire connecting part 42 and the wear indicating structure 41 and is matched and connected with the cam shaft 3, the wear indicating structure 41 is arranged at one side of the cam shaft mounting hole 43 and indicates outwards, and the spring connecting hole 44 is arranged on the wear indicating structure 41; the wear indication structure 41 is a bird's beak structure extending outwards, and can also be a pointer structure; the wear indication structure 41 is arranged on the rocker arm 4 and is matched with the wear indication mark 152 arranged in the rocker arm cavity 15, and the limit position state of the rocker arm pointer after the shoe block is used for a long time can be observed and a new shoe block can be timely replaced through the observation window 61 arranged on the cover plate 6; the abrasion condition of the current brake shoe is known by a user in time, unsafe factors are reduced, and the safe and reliable use of the brake is improved.

More preferably: as shown in fig. 2, 3 and 5, the switch box assembly 1 is an integral structure of aluminum alloy or reinforced plastic, and the inner side is further provided with a multi-stage annular waterproof step structure 16. The integrated into one piece sound construction and inboard periphery are equipped with annular waterproof step structure 16, effectively prevent outside water, silt, dust to the influence of brake shoe.

When the brake cable connecting device is installed, the upper cover 6 is firstly opened, and the brake cable tail end limiting pin is installed in a clamping groove of the brake cable connecting part 42 at the tail part of the rocker arm 4; then the brake cable passes through a brake cable through hole 151 arranged on one side of the rocker arm cavity 15, the upper cover 6 is fixed by a rear buckle, and the shoe block is positioned at the optimal position and the initial position indicated by the rocker arm after the brake is loaded; the indication mark 152 in the rocker arm cavity 15 is formed by assembling and labeling with the brake box assembly 1; after riding for a period of time, the limit position state of the rocker arm indicating structure 41 after the brake shoe block is used for a long time can be observed through the observation window 61, and a new shoe block can be timely replaced; after braking, the brake handle is released, and the rocker arm is quickly reset under the action of the tension spring 7 and returns to an initial state; the fully-closed structure effectively prevents muddy water and sand dust from entering the brake, and lubricating oil is added to the camshaft 3, the rotating shaft hole 13 and the opening and closing ends of the brake shoes 2 so that the moving camshaft 3 is kept smooth and sensitive, and the braking effect is improved; the closed hub brake with the structure is not exposed to the outside at key parts, so that the running safety of the vehicle is ensured.

The embodiments of the present utility model are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present utility model.

Claims

1. A closed hub brake comprising: brake box subassembly (1), brake shoe (2), camshaft (3) and rocking arm (4), brake shoe (2) symmetry sets up on fixed core axle (12) and pivot hole (13) of brake box subassembly (1) inboard, be equipped with camshaft (3) in pivot hole (13), camshaft (3) one end centre gripping is at brake shoe (2) open and shut end, its characterized in that: the cam shaft (3) other end and rocking arm (4) can dismantle in rocking arm chamber (15) of connecting in brake box subassembly (1) outside, rocking arm chamber (15) one side is equipped with stops line through-hole (151) be furnished with apron (6) on rocking arm chamber (15) and form closed rocking arm structure.

2. A closed hub brake according to claim 1, wherein: the motor brake device is characterized in that a motor center shaft hole (11) is formed in the center position of the brake box assembly (1), the fixed core shaft (12) and the rotating shaft hole (13) are symmetrically arranged on two sides of the center shaft hole (11), an epitaxial protruding frame limiting structure (14) is arranged on one side, close to the rotating shaft hole (13), of the outer side of the brake box assembly (1), and the rocker arm cavity (15) protrudes upwards to be arranged on the outer side face of the brake box assembly (1) and located between the frame limiting structure (14) and the center shaft hole (11) and surrounds the rotating shaft hole (13).

3. A closed hub brake according to claim 2, wherein: the frame limiting structure (14) is arranged on one side of the brake line through hole (151) in parallel, and a reinforcing rib structure is further arranged on the other side of the frame limiting structure (14).

4. A closed hub brake according to claim 1, wherein: the bottom of the rocker arm cavity (15) is provided with a rocker arm reset mounting structure (153) which is connected with the rocker arm (4) through a reset spring (7) and enables the rocker arm to have a reset trend.

5. A closed hub brake according to claim 1, wherein: the rocker arm cavity (15) is internally provided with a clamping groove and a plurality of boss mounting holes (154) which are connected with the cover plate (6) in an adapting way.

6. A closed hub brake according to claim 1, wherein: one end of the cam shaft (3) is provided with a cam part (31) which is matched with the brake shoe (2), and the other end of the cam shaft is provided with an annular groove (32) and an end face limiting groove (33) which are fixedly connected with the rocker arm (4) through a limiting clamp spring (5).

7. A closed hub brake according to claim 1, wherein: one end of the rocker arm (4) is provided with a wear indication structure (41), a wear indication mark (152) and an observation window (61) are respectively arranged in the rocker arm cavity (15) and on the cover plate (6) and are correspondingly matched with the wear indication structure (41), and the observation window (61) is of an arc-shaped structure.

8. The closed hub brake of claim 7, wherein: still be equipped with on rocking arm (4) and stop line connecting portion (42), camshaft mounting hole (43) and spring coupling hole (44), the other end that stops line connecting portion (42) set up in rocking arm (4) and brake line tip adaptation, camshaft mounting hole (43) set up between stopping line connecting portion (42) and wear indication structure (41) and with camshaft (3) adaptation connection, wear indication structure (41) set up in camshaft mounting hole (43) one side and outwards instruct, spring coupling hole (44) set up on wear indication structure (41).

9. A closed hub brake according to claim 1, wherein: the brake box assembly (1) is of an aluminum alloy or reinforced plastic integrated structure, and a multistage annular waterproof step structure (16) is further arranged on the inner side.