CN219668181U - Parking brake device and vehicle - Google Patents

Abstract

The utility model discloses a parking brake device and a vehicle, wherein the parking brake device comprises a brake handle, a drum brake, a direction regulator and a guy cable, wherein the drum brake is provided with a cam rocker arm and a fixed bracket, and the cam rocker arm can be close to or far from the fixed bracket; the direction regulator is fixedly arranged on the fixed bracket; the stay cable comprises a shaft tube and a mandrel which is movably arranged in the shaft tube, the shaft tube penetrates through the direction regulator, one end of the mandrel is connected with the braking handle, the other end of the mandrel is connected with the cam rocker arm, and the direction regulator enables the shaft tube to move relative to the fixed support. The technical scheme of the utility model aims to solve the problem that interference friction is generated between the outer surface of the cable mandrel and the inner surface of the shaft tube of the cable when the cable of the parking brake device works, and avoid the conditions of abrasion and fracture of the cable mandrel.

Description

Parking brake device and vehicle

Technical Field

The utility model relates to the technical field of parking braking, in particular to a parking braking device and a vehicle.

Background

The parking brake device of the traditional vehicle comprises a brake handle, a guy cable and a drum brake, wherein the guy cable is fixed on a guy cable fixing support of the drum brake, the guy cable is fixed with a cam rocker arm of the drum brake, the hand brake handle is pulled, a guy cable mandrel moves forwards to drive the cam rocker arm to rotate, and the cam rocker arm stretches out brake shoes in the drum brake, so that the brake shoes are contacted with a brake drum of the drum brake to generate braking force, and parking brake is realized. When the hand brake handle is released, the cable core moves backwards, the pulling force of the cam rocker disappears, the cam rocker returns to the original position under the action of the return spring between the brake shoes, the brake shoes are separated from the brake drum, and the parking brake is released. However, when the parking brake handle is pulled up, the cam rocker rotates along with the brake cable, the stroke of the cam rocker is a section of circular arc, a high point and a low point of a movement track exist, the joint of the shaft end of the cable and the cam rocker can generate an up-down movement distance deviation, the shaft tube of the cable is fixedly arranged on the fixed support, the shaft tube mounting angle of the cable is fixed, the shaft tube of the cable can swing up and down along with the rotation of the cam rocker, and interference friction is generated between the outer surface of the shaft tube of the cable and the inner surface of the shaft tube of the cable. Over time, burrs can appear, so that poor return of a guy cable is caused, even the situation that a guy cable mandrel is worn and broken appears, and the problem of failure of a parking brake system appears.

Disclosure of Invention

The utility model mainly aims to provide a parking brake device, which aims to solve the problem that the outer surface of a cable mandrel and the inner surface of a shaft tube of the cable generate interference friction when the cable of the parking brake device works, and avoid the conditions of abrasion and fracture of the cable mandrel.

In order to achieve the above object, the present utility model provides a parking brake device comprising:

a brake handle;

a drum brake provided with a cam rocker arm and a fixed bracket, the cam rocker arm being movable toward and away from the fixed bracket;

the direction regulator is fixedly arranged on the fixed bracket; and

the inhaul cable comprises a shaft tube and a mandrel which is movably arranged in the shaft tube, the shaft tube penetrates through the direction regulator, one end of the mandrel is connected with the braking handle, the other end of the mandrel is connected with the cam rocker arm, and the direction regulator enables the shaft tube to move relative to the fixed support.

Optionally, the direction regulator includes the mount pad, and the activity is arranged in the sleeve seat in the mount pad, the mount pad with the fixed bolster is connected, the central siphon wears to locate the sleeve seat.

Optionally, a ball-and-socket structure is arranged between the mounting seat and the sleeve seat.

Optionally, the mount pad include the pedestal portion, and with the fixed part that pedestal portion is connected, fixed part with the fixed bolster is connected, pedestal portion indent spherical shell, the sleeve pipe seat includes the body portion, runs through the sleeve pipe portion in the middle of the body portion, the both ends of sleeve pipe seat extend respectively outside the body portion, the body portion evagination forms the bulb, the body portion passes through the bulb with the spherical shell is movably arranged in the pedestal portion, the central siphon passes through the sleeve pipe portion the body portion, the central siphon is fixed in the sleeve pipe portion.

Optionally, the shaft tube is fixed to the sleeve portion by a lock nut.

Optionally, the two ends of the base body are provided with fixing parts, the fixing parts are provided with fixing holes, the fixing support is provided with mounting holes corresponding to the fixing holes, the fastening pieces penetrate through the fixing holes and the mounting holes, and the fixing parts are fixed with the fixing support.

Optionally, a locking ring is arranged at one end of the mandrel connected with the cam rocker arm, the cam rocker arm is provided with a connecting hole corresponding to the locking ring, and the locking ring is connected with the cam rocker arm through a fastener.

Optionally, an elastic reset piece is further arranged between the shaft tube fixed on the fixed support and the mandrel connected with the cam rocker, and under the action of the elastic reset piece, the cam rocker has a trend of being far away from the fixed support.

Optionally, the elastic reset piece is configured as a compression spring, one end of the compression spring is connected with the shaft tube, and the other end of the compression spring is connected with the mandrel.

The utility model also proposes a vehicle comprising a parking brake device as described above.

According to the technical scheme, the brake handle, the drum brake, the direction regulator and the inhaul cable are adopted, the drum brake is provided with a cam rocker arm and a fixed support, and the cam rocker arm can be close to or far from the fixed support; the direction regulator is fixedly arranged on the fixed bracket; the stay cable comprises a shaft tube and a mandrel which is movably arranged in the shaft tube, the shaft tube penetrates through the direction regulator and is fixed with the direction regulator, one end of the mandrel is connected with the braking handle, the other end of the mandrel is connected with the cam rocker arm, and the direction regulator enables the shaft tube to move relative to the fixed support. The parking braking device of the traditional vehicle comprises a braking handle, a pull rope and a central brake, wherein the pull rope is fixed on a pull rope fixing support of the central brake, the pull rope is fixed with a cam rocker arm of the central brake, the installation angle of the pull rope shaft tube is fixed, the cam rocker arm rotates along with the braking pull rope, the travel is a section of circular arc, a high point and a low point of motion track exist, the joint of the pull rope shaft end and the cam rocker arm can generate vertical motion distance offset, and the pull rope mandrel can swing up and down along with the rotation of the cam rocker arm, so that the problem that interference friction is generated between the outer surface of the pull rope mandrel and the inner surface of the shaft tube of the pull rope is caused at the fixing support, the shaft tube of the pull rope is connected with the fixing support through a direction regulator, the scheme of directly rigidly connecting the shaft tube of the pull rope with the direction regulator is replaced on the fixing support, the shaft tube angle of the pull rope is adjustable through the direction regulator, the shaft tube of the pull rope is basically consistent with the axial concentricity of the mandrel, the mandrel of the pull rope can swing up and down along with the rotation of the cam rocker arm is overcome, the problem that friction is generated between the outer surface of the mandrel of the pull rope and the inner surface of the pull rope is avoided, the problem that the friction is caused to be caused, the situation that the service life of the pull rope is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a parking brake apparatus according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of the drum brake of FIG. 1;

FIG. 3 is a schematic view of an embodiment of the steering device and the fixing bracket in FIG. 1;

FIG. 4 is a schematic diagram of an embodiment of the steering device in FIG. 3;

fig. 5 is an enlarged view at a drum brake of another embodiment. Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The parking brake device of the traditional vehicle comprises a brake handle, a guy cable and a drum brake, wherein the guy cable is fixed on a guy cable fixing support of the drum brake, the guy cable is fixed with a cam rocker arm of the drum brake, the hand brake handle is pulled, a guy cable mandrel moves forwards to drive the cam rocker arm to rotate, and the cam rocker arm stretches out brake shoes in the drum brake, so that the brake shoes are contacted with a brake drum of the drum brake to generate braking force, and parking brake is realized. When the hand brake handle is released, the cable core moves backwards, the pulling force of the cam rocker disappears, the cam rocker returns to the original position under the action of the return spring between the brake shoes, the brake shoes are separated from the brake drum, and the parking brake is released.

The traditional parking braking device has a simple structure, is adopted by most manufacturers, but the cable mandrel has friction to influence the service life, in the traditional scheme, when the parking braking handle is pulled up, the cam rocker rotates along with a braking cable, the travel of the cam rocker is a section of circular arc, a high point and a low point of a motion track exist, the joint of the cable shaft end and the cam rocker can generate vertical motion distance offset, the shaft tube of the cable is fixedly arranged on the fixed support, the shaft tube mounting angle of the cable is fixed, the cable mandrel can rotate along with the cam rocker to generate vertical swing, and the outer surface of the cable mandrel and the inner surface of the shaft tube of the cable generate interference friction. Along with the lapse of time, can appear the burr, lead to the cable return bad, the cable dabber is woven by stranded thin steel wire at present and forms, and long-time friction appears the cable dabber wearing and tearing, cracked condition even, appears the problem that parking braking system became invalid.

Therefore, the utility model provides a parking brake device, which aims to solve the problem that the outer surface of a cable mandrel and the inner surface of a shaft tube of the cable generate interference friction when the cable of the parking brake device works, and avoid the conditions of abrasion and fracture of the cable mandrel.

Referring to fig. 1, in an embodiment of the present utility model, the parking brake apparatus 100 includes a brake handle 10, a drum brake 20, a steering 30, and a cable 40.

The conventional parking brake apparatus 100 for a vehicle includes a brake handle 10, a cable 40, and a drum brake 20, the cable 40 is fixed to a cable 40 fixing bracket 22 of the drum brake 20, the cable 40 is fixed to a cam rocker 21 of the drum brake 20, the hand brake handle 10 is pulled, a spindle 42 of the cable 40 moves forward, the cam rocker 21 is driven to rotate, the cam rocker 21 expands brake shoes in the drum brake 20, the brake shoes are brought into contact with a brake drum of the drum brake 20, and a braking force is generated to realize parking braking. When the hand brake handle 10 is released, the mandrel 42 of the stay cable 40 moves backwards, the pulling force of the cam rocker arm 21 disappears, the cam rocker arm 21 returns to the original position under the action of the return spring between the brake shoes, the brake shoes are separated from the brake drum, and the parking brake is released.

The functions of the parking brake apparatus 100 are: after the vehicle stops running, the vehicle is prevented from slipping, so that the vehicle can start on an uphill slope; or after the service brake of the vehicle fails, the emergency brake is temporarily used or matched with the service brake. Most of the vehicle type brakes of the light cargo vehicle are mounted at the rear end of the transmission, referred to as a central drum type parking brake device 100, hereinafter simply referred to as drum brake 20.

A drum brake 20, the drum brake 20 being provided with a cam rocker 21 and a fixed bracket 22, the cam rocker 21 being movable closer to or farther from the fixed bracket 22; the direction regulator 30 is fixedly installed on the fixed bracket 22; the stay 40 includes a shaft tube 41, and a spindle 42 movably disposed in the shaft tube 41, the shaft tube 41 passes through the direction regulator 30 and is fixed with the same, one end of the spindle 42 is connected with the brake handle 10, the other end of the spindle 42 is connected with the cam rocker 21, and the direction regulator 30 enables the shaft tube 41 to move relative to the fixed bracket 22.

Referring to fig. 2 to 5, in order to solve the problem that the outer surface of the mandrel 42 of the cable 40 and the inner surface of the shaft tube 41 of the cable 40 generate interference friction, the direction regulator 30 includes a mounting seat 31 and a sleeve seat 34 movably disposed in the mounting seat 31, the mounting seat 31 is connected with the fixing bracket 22, and the shaft tube 41 passes through the sleeve seat 34 and is fixed with the sleeve seat 34.

After the direction regulator 30 is connected with the fixed support 22, the shaft tube 41 of the inhaul cable 40 is connected with the direction regulator 30, so that the scheme that the shaft tube 41 of the inhaul cable 40 is directly and rigidly connected to the fixed support 22 is replaced by adopting the direction regulator 30, the angle of the shaft tube 41 of the inhaul cable 40 is adjustable, the axial concentricity of the shaft tube 41 of the inhaul cable 40 and the mandrel 42 is basically consistent, the mandrel 42 of the inhaul cable 40 can swing up and down along with the rotation of the cam rocker 21 is overcome, interference friction is generated between the outer surface of the mandrel 42 of the inhaul cable 40 and the inner surface of the shaft tube 41 of the inhaul cable 40, and friction damage between the two is reduced.

In an embodiment, a ball-and-socket structure is provided between the mounting seat 31 and the sleeve seat 34. Or the ball joint is formed between the mounting seat 31 and the sleeve seat 34, the inner ring can rotate and swing at any angle relative to the outer ring, so that the self-adjusting function is realized, and the problem that interference friction is generated between the outer surface of the mandrel 42 of the inhaul cable 40 and the inner surface of the shaft tube 41 of the inhaul cable 40 is solved.

Specifically, the mounting seat 31 includes a seat body 32, and a fixing portion 33 connected to the seat body 32, the fixing portion 33 is connected to the fixing bracket 22, the seat body 32 is concave to form a spherical shell 321, the sleeve seat 34 includes a tube body 35, and a sleeve portion 36 penetrating through a middle of the tube body 35, two ends of the sleeve seat 34 extend out of the tube body 35, the tube body 35 is convex to form a ball head 351, the tube body 35 is movably disposed in the seat body 32 through the ball head 351 and the spherical shell 321, the shaft tube 41 passes through the tube body 35 through the sleeve portion 36, and the shaft tube 41 is fixed to the sleeve portion 36.

Or, the direction regulator 30 is a joint bearing, the outer ring is connected with the fixed support 22, the shaft tube 41 of the inhaul cable 40 is fixed on the inner ring, and the inner ring can rotate and swing at any angle relative to the outer ring during movement, so that the direction regulator has a self-aligning function, and the problem that interference friction is generated between the outer surface of the mandrel 42 of the inhaul cable 40 and the inner surface of the shaft tube 41 of the inhaul cable 40 is solved.

In another embodiment, the direction regulator 30 includes an inner shell and a movable member movably disposed in the inner shell, wherein the space of the inner shell is larger than that of the movable member, so that the movable member can move by itself, like a stone ball in a stone lion mouth, and the shaft tube 41 of the guy cable 40 passes through the movable member, so that when the mandrel 42 of the guy cable 40 rotates along with the cam rocker 21 to swing up and down, the shaft tube 41 can move together, thereby solving the problem that interference friction is generated between the outer surface of the mandrel 42 of the guy cable 40 and the inner surface of the shaft tube 41 of the guy cable 40.

In other embodiments, the direction regulator 30 includes a fixing member, which is transversely fixed in the fixing bracket 22 by a spring, and the fixing member can swing up and down, and the shaft tube 41 is connected with the fixing member, so as to solve the problem that interference friction is generated between the outer surface of the core shaft 42 of the cable 40 and the inner surface of the shaft tube 41 of the cable 40.

In yet another embodiment, the steering gear 30 may be formed as a hinged joint, for example, the steering gear 30 is configured as a cylinder that fits into a curved recess to produce a purely rotational motion.

During installation, in order to facilitate firm connection and disassembly of the mounting seat 31 and the fixing support 22, in this embodiment, the fixing portions 33 are located at two ends of the seat body 32, the fixing portions 33 are provided with fixing holes, the fixing support 22 is provided with mounting holes corresponding to the fixing holes, the fastening pieces penetrate through the fixing holes and the mounting holes, and the fixing portions 33 are fixed with the fixing support 22. The fasteners may be configured as rivets or bolts or the like.

In other embodiments, the mounting block 31 may be attached to the mounting bracket 22 by welding or by gluing.

After the shaft tube 41 passes through the sleeve seat 34, one end of the mandrel 42 is connected with the cam rocker arm 21, specifically, for convenience in disassembly, one end of the mandrel 42 connected with the cam rocker arm 21 is provided with a locking ring 43, the cam rocker arm 21 is provided with a connecting hole corresponding to the locking ring 43, and the locking ring 43 is connected with the cam rocker arm 21 through a fastener. In order to fix the shaft tube 41 relative to the sleeve mount 34 against axial displacement, in this embodiment the shaft tube 41 is fixed to the sleeve portion 36 by means of a lock nut. The sleeve holder 34 has two ends extending to the outside of the pipe body 35, and the shaft tube 41 is fixed to the sleeve holder 34 by locking nuts in the directions of the two ends. In other embodiments, the sleeve holder 34 and the shaft tube 41 may be fixed by screw compression or by gluing.

As described above, the brake shoes inside the drum brake 20 have the return springs, and the hardness of the springs is high, so that when the parking brake is released, the brake shoes are ensured to be rapidly separated from the brake drum, and after the hand brake is released, the return springs are in a freely telescopic state, and the return force is reduced. The stay cable 40 for parking brake is of a flexible shaft structure, is influenced by the installation space of the vehicle type, and is often bent during installation, and even reaches the minimum bending radius of the flexible shaft. Under the working condition, after the mandrel 42 of the inhaul cable 40 and the shaft tube 41 of the inhaul cable 40 are bent, the movement retarding force of the mandrel 42 of the inhaul cable 40 is increased, when the retarding force is equal to or greater than the return force, the situation that the return is unsmooth exists, the critical state that the brake shoe and the brake drum are in similar non-connection is generated, the situation that the drum brake 20 generates heat locally is generated, and the risk hidden danger of abrasion or ablation of the brake shoe is caused.

In order to solve the problem that the spindle 42 of the cable 40 is not completely returned after the parking brake is released in the related art, a return bracket is additionally arranged on the brake, the cam rocker 21 is positioned between the fixed bracket 22 and the return bracket, and the return bracket is connected with the cam rocker 21 through an extension spring, so that after the cable 40 pulls the cam rocker 21 to rotate, the cam rocker 21 has a trend of being far away from the fixed bracket 22 due to the resilience force of the extension spring, and the problem that the spindle 42 of the cable 40 is not completely returned is solved. The accurate position of the return bracket is difficult to ensure in welding, the position deviation between the return bracket and the cam rocker 21 is large, or the installation distance is reduced, so that the return force is reduced. After the parking brake cable 40 is used, as the use frequency increases, the spindle 42 of the cable 40 has a certain elongation, which also causes the restoring force to decrease. When the hand brake is frequently pulled and the return spring is in a stretching state, the return spring can generate elongation, various working conditions are accumulated, and finally the working condition that the tension spring fails is caused. In addition, the return bracket also causes half of the outer rim space of the drum brake 20 to be occupied and is aesthetically undesirable.

Referring to fig. 5, in order to solve the problem that the spindle 42 of the cable 40 is not completely returned after the parking brake is released, in the present utility model, an elastic return member 50 is further provided between the spindle 41 fixed to the fixing bracket 22 and the spindle 42 connected to the cam rocker 21, and the cam rocker 21 has a tendency to be far away from the fixing bracket 22 by the elastic return member 50. After the cable 40 is installed, the elastic force reserved by the elastic restoring member 50 can cause the cam rocker 21 to have a trend of being far away from the fixed bracket 22, so that the problem that the mandrel 42 of the cable 40 is not completely restored is solved.

In one embodiment, the elastic restoring member 50 is configured as a compression spring, one end of which is connected to the shaft tube 41, and the other end of which is connected to the core shaft 42. The two ends of the compression spring can be provided with the baffle plates, the rebound force is transmitted through the baffle plates, the return effect of the mandrel 42 is ensured, the gap between the brake shoe plate and the brake drum is ensured, and friction can not be generated.

In other embodiments, the elastic restoring member 50 may be a spring structure.

Considering that the cable 40 of the parking brake increases with the frequency of use, the spindle 42 of the cable 40 has a certain elongation, which also results in a reduction of the restoring force. When the hand brake is frequently pulled, the return spring of the brake generates elongation when being in a tensile state, and the position of the shaft tube 41 of the inhaul cable 40 can be adjusted by loosening the lock nut for errors and deformation problems, so that the brake is simple and easy to implement.

The present utility model also proposes a vehicle, which includes the parking brake device 100, and the specific structure of the parking brake device 100 refers to the above embodiments, and since the vehicle adopts all the technical solutions of all the above embodiments, at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described in detail herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A parking brake apparatus, comprising:

a brake handle;

a drum brake provided with a cam rocker arm and a fixed bracket, the cam rocker arm being movable toward and away from the fixed bracket;

the direction regulator is fixedly arranged on the fixed bracket; and

the inhaul cable comprises a shaft tube and a mandrel which is movably arranged in the shaft tube, the shaft tube penetrates through the direction regulator, one end of the mandrel is connected with the braking handle, the other end of the mandrel is connected with the cam rocker arm, and the direction regulator enables the shaft tube to move relative to the fixed support.

2. The seed parking brake apparatus of claim 1, wherein the steering gear includes a mounting seat and a sleeve seat movably disposed in the mounting seat, the mounting seat is connected to the fixing bracket, and the shaft tube is disposed through the sleeve seat.

3. A seed parking brake as defined in claim 2, wherein a ball and socket arrangement is provided between said mounting and said sleeve mount.

4. A seed parking brake device according to claim 3, wherein the mounting base comprises a base body and a fixing part connected with the base body, the fixing part is connected with the fixing support, the base body is concavely provided with a ball shell, the sleeve base comprises a pipe body and a sleeve part penetrating through the middle of the pipe body, two ends of the sleeve base extend out of the pipe body respectively, the pipe body protrudes outwards to form a ball head, the pipe body is movably arranged in the base body through the ball head and the ball shell, the shaft tube penetrates through the pipe body through the sleeve part, and the shaft tube is fixed to the sleeve part.

5. A seed parking brake apparatus according to claim 4, wherein the shaft tube is fixed to the sleeve portion by a lock nut.

6. The seed parking brake device according to claim 4, wherein the two ends of the seat body are provided with fixing portions, the fixing portions are provided with fixing holes, the fixing bracket is provided with mounting holes corresponding to the fixing holes, the fastening members pass through the fixing holes and the mounting holes, and the fixing portions are fixed with the fixing bracket.

7. The parking brake apparatus of claim 1, wherein a locking ring is provided at an end of the spindle connected to the cam rocker arm, the cam rocker arm is provided with a connection hole corresponding to the locking ring, and the locking ring is connected to the cam rocker arm by a fastener.

8. A seed parking brake according to claim 1, wherein an elastic return member is further provided between the shaft tube fixed to the fixed bracket and the spindle connected to the cam rocker arm, the cam rocker arm having a tendency to move away from the fixed bracket under the action of the elastic return member.

9. A seed parking brake according to claim 8, wherein the resilient return member is configured as a compression spring, one end of the compression spring being connected to the axle tube, and the other end of the compression spring being connected to the spindle.

10. A vehicle comprising a parking brake apparatus as claimed in any one of claims 1 to 9.