CN212243315U

CN212243315U - Driven axle braking system

Info

Publication number: CN212243315U
Application number: CN202020533440.4U
Authority: CN
Inventors: 张卫东; 向燕; 彭劲松; 孙小红
Original assignee: Changsha Carrie Heavy Industry Co ltd
Current assignee: Changsha Carrie Heavy Industry Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-29
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a driven axle braking system, this driven axle braking system install and be used for braking epaxial wheel hub of transmission on driven axle's transmission shaft, and driven axle braking system includes the closed shell, the braking body and drive wheel, and the drive wheel cover is established outside the transmission shaft, and the drive wheel is connected with wheel hub and is used for transmitting the braking force that comes with the braking body and transmits for wheel hub, forms between closed shell, wheel hub and the transmission shaft and accepts the chamber, and it has the coolant liquid to accept the intracavity packing. The utility model discloses a driven axle braking system is through accommodating the braking body in the closed shell and filling the coolant liquid in accommodating the chamber, makes the braking body in the closed environment of immersion oil, and braking system forms an infiltration type braking, and the heat that the braking produced is taken away by the coolant liquid, has good heat dispersion, has reduced the number of times of maintenance; the brake body is positioned in the closed structure, the annular working area is large, the immersion of impurities is prevented, the pollution and the abrasion of parts are reduced, and the maintenance is avoided.

Description

Driven axle braking system

Technical Field

The utility model relates to the technical field of vehicles, especially, relate to a driven axle braking system.

Background

The driven axle refers to an axle which does not transmit power. The rear axle of a front wheel drive automobile is the driven axle. The driven axle is divided into drum brake and dry brake according to the braking form.

Among them, the drum brake is inexpensive to manufacture and conforms to the conventional design. However, drum brakes are much less effective and heat dissipating. The drum brake has poor stability of braking force, and the braking force changes greatly on different road surfaces, which is not easy to control. And a large amount of heat is collected during braking due to poor heat dissipation. The brake block and the wheel drum are easy to generate extremely complex deformation under the influence of high temperature, and brake recession and vibration phenomena are easy to generate, so that the brake efficiency is reduced. In addition, after the drum brake is used for a period of time, the gap of the brake shoe needs to be adjusted regularly, and even the whole brake drum needs to be removed to clean the brake powder accumulated in the brake drum.

The dry brake adopts caliper disc brake, and the brake disc are exposed outside and are easily polluted and abraded by materials, so that the dry brake is very complicated to maintain and has high maintenance cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, an embodiment of the present invention is expected to provide a driven axle braking system with fast heat dissipation and maintenance-free.

The technical scheme of the utility model is realized like this:

a driven axle braking system is arranged on a transmission shaft of a driven axle and used for braking a hub on the transmission shaft, the driven axle braking system comprises a closed shell, a braking body and a driving wheel, wherein the braking body and the driving wheel are contained in the closed shell, the driving wheel is sleeved outside the transmission shaft and meshed with the braking body, the driving wheel is connected with the hub and used for transmitting the braking force transmitted by the braking body to the hub, a containing cavity is formed between the closed shell and the hub and the transmission shaft, and cooling liquid is filled in the containing cavity.

Preferably, the closed shell is provided with a liquid through hole, and the liquid through hole is communicated with the accommodating cavity.

Preferably, the close casing include first connection casing, with the second that first connection casing connects connect the casing and with the fixed casing that the casing is connected to the second, first connection casing cover is located outside the wheel hub, and it is sealed through floating oil seal between the two, fixed casing cover is located outside the transmission shaft and with the transmission shaft is connected fixedly.

Preferably, the brake body comprises a piston, a pad, a friction plate arranged between the piston and the pad, and a spring bolt and a slide block fixed on the closed shell, the friction plate is sleeved outside the transmission wheel, one part of the friction plate is connected with the transmission wheel in a matching manner, the other part of the friction plate is connected with the closed shell in a matching manner, one end of the slide block is abutted to the spring bolt, and the other end of the slide block is abutted to the piston.

Preferably, the friction plates include a dynamic friction plate and a static friction plate, the dynamic friction plate is sleeved outside the driving wheel and is meshed with the driving wheel, and the static friction plate is sleeved outside the driving wheel and is meshed with the closed shell.

Preferably, the dynamic friction plate and the static friction plate are respectively a plurality of plates arranged at intervals, and the dynamic friction plate and the static friction plate are arranged in a staggered manner.

Preferably, the friction plate is disc-shaped and is made of alloy steel.

Preferably, the driving wheel is detachably connected with the hub.

Preferably, the driving wheel is connected with the hub through a bolt.

Preferably, the transmission wheel is a spline.

The embodiment of the utility model provides a driven axle braking system is through acceping the braking body in the closed shell and in acceping the intracavity and pack the coolant liquid, make the braking body in the closed environment of immersion oil, like this, braking system forms an infiltration type braking, and the heat that produces in the braking process is mostly taken away by the coolant liquid, and the apparent operating temperature that has reduced has good heat dispersion, has reduced the number of times of maintenance, has prolonged braking system's life; the brake body is positioned in the closed structure, the annular working area is large, the immersion of impurities such as mud, water, oil and the like is prevented, the pollution and abrasion between the brake body and other parts are reduced, the maintenance can be basically avoided, and the maintenance cost is effectively reduced.

Drawings

Fig. 1 is a partial cross-sectional view of a driven axle braking system provided by the present invention;

fig. 2 is an external structural view of the driven axle brake system shown in fig. 1.

Detailed Description

In order to illustrate embodiments of the present invention or technical solutions in the prior art more clearly, the following description will be made in conjunction with the accompanying drawings in embodiments of the present invention to describe the technical solutions in the embodiments of the present invention clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2 in combination, fig. 1 is a partial sectional view of a driven axle braking system provided by the present invention; fig. 2 is an external structural view of the driven axle brake system shown in fig. 1. The driven axle braking system 5 is arranged on the transmission shaft 1 of the driven axle and used for braking the hub 3 on the transmission shaft 1 to stop the wheel from moving, so that the purpose of braking the wheel is achieved. Specifically, the hub 3 is sleeved on the transmission shaft 1 through a bearing 4.

The driven axle brake system 5 comprises a closed shell 53, a brake body 55 and a transmission wheel 57 which are accommodated in the closed shell 53, wherein the transmission wheel 57 is sleeved outside the transmission shaft 1 and is meshed with the brake body 55, the transmission wheel 57 is connected with the hub 3 and is used for transmitting the brake force transmitted by the brake body 55 to the hub 3, an accommodating cavity 51 is formed among the closed shell 53, the hub 3 and the transmission shaft 1, and the accommodating cavity 51 is filled with cooling liquid to ensure that the brake body 55 is in an oil-immersed closed environment, so that the brake system 5 forms immersion type braking, most of heat generated in the braking process is taken away by the cooling liquid, the working temperature is obviously reduced, the brake system has good heat dissipation performance, the maintenance is reduced, and the service life of the brake system is prolonged; the brake body 55 is located in a closed structure, the annular working area is large, the immersion of impurities such as mud, water and oil is prevented, the pollution and the abrasion of the brake body 55 and other parts are reduced, the maintenance can be basically avoided, and the maintenance cost is effectively reduced.

The closed casing 53 includes a first connecting casing 531, a second connecting casing 533 connected to the first connecting casing 531, and a fixed casing 535 connected to the second connecting casing 533, wherein the first connecting casing 531 is sleeved outside the hub 3, and the first connecting casing 531 and the second connecting casing are sealed by a floating oil seal 7, so that the sealing effect is better. The fixing housing 535 is sleeved outside the transmission shaft 1 and is fixedly connected to the transmission shaft 1. Specifically, in the present embodiment, the first connection housing 531 and the second connection housing 533 are connected by bolts, and the second connection housing 533 and the fixed housing 535 are also connected by bolts. The fixing housing 535 is fixed to the drive shaft 1 by welding.

The first connecting shell 531 of the closed shell 53 is provided with a liquid through hole 532, the liquid through hole 532 is communicated with the accommodating cavity 51, the liquid through hole 532 is communicated with a cooling pipe of a vehicle external circulation brake cooling system, so that the accommodating cavity 51 is filled with cooling liquid, the brake body 55 is immersed in a closed environment, the working temperature is reduced, and the heat dissipation speed is improved.

The brake body 55 comprises a piston 551, a backing plate 553, a friction plate 555 arranged between the piston 551 and the backing plate 553, a spring bolt 552 fixed on the first connecting shell 531 and a slide block 554, wherein the friction plate 555 is sleeved outside the transmission wheel 57, one part of the friction plate 555 is in fit connection with the transmission wheel 57, the other part of the friction plate 555 is in fit connection with the first connecting shell 531, one end of the slide block 554 is abutted against the spring bolt 552, and the other end of the slide block 554 is abutted against the piston 551. The piston 551 is driven by the oil supply system of the brake system 5 to move leftward, thereby pushing the friction plate 555 to move. By adopting the single-brake piston propulsion structure, the friction plate 555 is uniformly stressed, the disc clearance is not required to be adjusted, the slipping and the torque transmission are permitted, and the single-brake piston propulsion structure is suitable for the heavy-load long-slope braking working condition. Specifically, in this embodiment, the transmission wheel 57 is a spline.

The friction plate 555 comprises a dynamic friction plate 557 and a static friction plate 559, the dynamic friction plate 557 is sleeved outside the driving wheel 57 and is meshed with the driving wheel 57, and the static friction plate 559 is sleeved outside the driving wheel 57 and is meshed with the first connecting shell 531. In a normal state (when a vehicle runs), the driving wheel 57 drives the dynamic friction plate 557 to rotate together. During braking, the driving wheel 57 stops rotating through mutual adhesion between the dynamic friction plate 557 and the static friction plate 559, so that the hub stops rotating, relative rest is formed between the hub and the vehicle, and the vehicle is braked.

The dynamic friction plates 557 and the static friction plates 559 are respectively a plurality of pieces arranged at intervals, and the dynamic friction plates 557 and the static friction plates 559 are arranged in a staggered manner. Namely, one dynamic friction plate 557 is arranged between two static friction plates 559. Specifically, in this embodiment, the dynamic friction plates 557 are 2, and the static friction plates 559 are 3. By adopting a multi-piece structure for the friction plate 555, a larger braking torque can be obtained under a smaller lining pressure, the bearing pressure of an element is reduced, and the specific pressure of the friction plate is small.

Specifically, the static friction plate 559 is provided with external teeth, the first connecting shell 531 is an internal gear ring, internal teeth of the internal gear ring are meshed with the external teeth of the static friction plate 559, the dynamic friction plate 557 is provided with internal teeth, and the internal teeth of the dynamic friction plate 557 are meshed with the external teeth of the driving wheel 57, so that the friction plate 555 is braked more safely and reliably, the service life is longer, and maintenance is almost not needed.

Specifically, the second connecting housing 533 is a connecting disk, and the fixing housing 535 is an axle flange. The first connection housing 531 and the second connection housing 533 are connected by bolts.

The working process of the braking system is that in a normal state (when a vehicle runs), when the wheel hub 3 drives the driving wheel 57 to rotate together, the driving wheel 57 drives the dynamic friction plate 557 to rotate; during braking (vehicle braking), oil enters the piston cavity 59, the piston 551 presses the static friction sheet 555, the dynamic friction sheet 557 is attached to the static friction sheet 559, the dynamic friction sheet 557 is forced to stop rotating, the driving wheel 57 is forced to stop and the hub 3 is forced to stop rotating, and therefore the hub 3 is braked. When the brake is released, hydraulic oil in the piston cavity 59 flows back, the spring bolt 552 pushes the slide block 554 to move rightwards, so that the piston 551 returns, and the dynamic friction plate 557 is separated from and spaced from the static friction plate 559.

Specifically, in this embodiment, the friction plate 555 is in a shape of a disk and is made of gold steel or cast iron. Preferably, the friction plate 555 is made of cast iron.

Specifically, in this embodiment, the driving wheel 57 is detachably connected to the hub 3. Preferably, the transmission wheel 57 is connected with the hub 3 through a bolt, and the structure is simple.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A driven axle braking system is arranged on a transmission shaft of a driven axle and used for braking a wheel hub arranged on the transmission shaft, and is characterized in that the wheel hub is arranged on the transmission shaft through a bearing sleeve, the driven axle braking system comprises a closed shell, a braking body and a driving wheel, the braking body and the driving wheel are contained in the closed shell, the driving wheel is sleeved outside the transmission shaft and meshed with the braking body, the driving wheel is connected with the wheel hub and used for transmitting the braking force transmitted by the braking body to the wheel hub, a containing cavity is formed among the closed shell, the wheel hub and the transmission shaft, and cooling liquid is filled in the containing cavity.

2. The driven axle brake system according to claim 1, wherein the close housing defines a fluid passage hole, the fluid passage hole communicating with the receiving cavity.

3. The driven axle braking system of claim 1, wherein the close housing includes a first connecting housing, a second connecting housing connected to the first connecting housing, and a fixed housing connected to the second connecting housing, the first connecting housing is sleeved outside the hub and sealed by a floating oil seal, and the fixed housing is sleeved outside the transmission shaft and is fixedly connected to the transmission shaft.

4. The driven axle braking system according to claim 1, wherein the braking body includes a piston, a pad, a friction plate disposed between the piston and the pad, and a spring bolt and a slider fixed to the closed housing, the friction plate is sleeved outside the driving wheel, one portion of the friction plate is connected to the driving wheel in a fitting manner, the other portion of the friction plate is connected to the closed housing in a fitting manner, one end of the slider abuts against the spring bolt, and the other end of the slider abuts against the piston.

5. The driven axle braking system of claim 4, wherein the friction plates include a dynamic friction plate and a static friction plate, the dynamic friction plate is sleeved outside the driving wheel and engaged with the driving wheel, and the static friction plate is sleeved outside the driving wheel and engaged with the closed shell.

6. The driven axle braking system of claim 5, wherein the dynamic friction plate and the static friction plate are respectively a plurality of plates arranged at intervals, and the dynamic friction plate and the static friction plate are arranged in a staggered manner.

7. The driven axle brake system of claim 4, wherein the friction plate is disc-shaped and is formed of alloy steel.

8. A slave axle braking system according to claim 1, wherein the drive wheel is removably connected to the hub.

9. A slave axle braking system according to claim 1, wherein the drive wheel is bolted to the hub.

10. A slave axle braking system according to claim 1, wherein the drive wheel is splined.