CN217864070U

CN217864070U - Braking device, chassis and vehicle

Info

Publication number: CN217864070U
Application number: CN202121449465.7U
Authority: CN
Inventors: 吕俊飞; 陆俊
Original assignee: Baoneng Guangzhou Automobile Research Institute Co Ltd
Current assignee: Shenzhen Shengbo Hairui Management Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-11-22
Anticipated expiration: 2031-06-28

Abstract

The utility model discloses a braking device, chassis and vehicle, a housing, pivot subassembly and brake assembly, be formed with inclosed holding chamber in the casing, a part of pivot is arranged in the holding chamber, the both ends of pivot stretch out to the outside of casing, the one end of pivot is used for with semi-axis fixed connection, the other end of pivot is used for installing the wheel, the pivot rotates with the casing to be connected, and the pivot is sealed with the junction of casing, brake assembly includes drive element, brake block and brake disc, brake assembly is arranged in the holding chamber, brake disc and pivot fixed connection, the brake block is connected with the casing, under drive element's effect, the brake block can support with the brake disc and hold or separate the utility model discloses a braking device can promote sealing performance, reduces the probability by water erosion, increase of service life, keep brake capacity.

Description

Braking device, chassis and vehicle

Technical Field

The utility model relates to the field of automotive technology, especially, relate to a braking device, chassis and vehicle.

Background

The general principle of braking, commonly known as braking, refers to the action of stopping or slowing a running vehicle or other means of conveyance, which is to fix a wheel or disc on the high-speed shaft of the machine, and to mount a shoe, belt or disc on the machine bed in accordance with the braking action, so that the brake moment is generated under the action of an external force.

The existing brake assembly is easy to be corroded by water and rusted in rainy or humid weather, so that the service life of the brake assembly is shortened, the braking capability is weakened, and the driving safety is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a braking device can promote sealing performance, reduces the probability by water erosion, and increase of service life keeps braking capability.

The utility model discloses still provide a chassis that has above-mentioned arresting gear.

The utility model discloses still provide a vehicle that has above-mentioned chassis.

According to the utility model discloses a arresting gear of first aspect embodiment includes:

the device comprises a shell, a first fixing device and a second fixing device, wherein a closed accommodating cavity is formed in the shell;

a part of the rotating shaft is positioned in the accommodating cavity, two ends of the rotating shaft extend out of the shell, one end of the rotating shaft is fixedly connected with a half shaft, the other end of the rotating shaft is used for mounting wheels, the rotating shaft is rotatably connected with the shell, and the joint of the rotating shaft and the shell is sealed;

the brake assembly comprises a driving element, a brake pad and a brake disc, the brake assembly is located in the accommodating cavity, the brake disc is fixedly connected with the rotating shaft, the brake pad is connected with the shell, and under the action of the driving element, the brake pad can be abutted to or separated from the brake disc.

According to the utility model discloses arresting gear has following beneficial effect at least: one part of the rotating shaft is positioned in the accommodating cavity, so that a brake disc is convenient to mount, two ends of the rotating shaft extend out of the shell, one end of the rotating shaft is fixedly connected with the half shaft, namely the rotating shaft can input the torque of a power system, the other end of the rotating shaft is used for mounting a wheel, namely the rotating shaft can output the input torque to the wheel, the rotating shaft is rotatably connected with the shell, the brake disc is fixedly connected with the rotating shaft, and the brake pad is connected with the shell; because the holding chamber is airtight, the junction of pivot and casing is sealed, and the brake subassembly is located the holding chamber, and drive element, brake block and brake disc all are located the holding chamber promptly, and the brake subassembly is in the holding chamber that the leakproofness is better, and the brake subassembly is difficult to receive external moisture to corrode, is difficult to rust, and arresting gear long service life sustainably keeps braking capacity, is favorable to guaranteeing driving safety.

According to some embodiments of the utility model, the brake block is provided with two, the drive element is used for ordering about two the brake block is close to or keeps away from the brake disc simultaneously.

According to some embodiments of the utility model, brake assembly still includes connecting rod, two depression bars and two pull rods, two the depression bar is located respectively the both sides of the radial direction of brake disc, two the brake block is fixed in two respectively the depression bar, just the brake block is located the depression bar orientation one side of brake disc, two the one end of depression bar with the casing rotates to be connected, two the other end of depression bar respectively with two the one end of pull rod is rotated to be connected, two the other end of pull rod respectively with the both ends of connecting rod are rotated to be connected, the middle part of connecting rod with the pivot is rotated to be connected, drive element is used for ordering about one the depression bar winds the casing is rotatory.

According to some embodiments of the utility model, still include radiator unit, radiator unit includes multi-disc heat dissipation fan blade, multi-disc the heat dissipation fan blade is located outside the casing, and with pivot fixed connection, multi-disc the heat dissipation fan blade about the axle center symmetry of pivot.

According to some embodiments of the utility model, radiator unit still includes many spinal branchs vaulting pole, the bracing piece with the quantity of heat dissipation fan blade is the same, and the monolithic the heat dissipation fan blade is fixed in one the one end of bracing piece, the other end of bracing piece is fixed in the pivot, the casing is discoid, the multi-disc the heat dissipation fan blade is followed the circumference of casing distributes.

According to some embodiments of the utility model, the radiator unit still includes the sleeve, the sleeve cover is established in the pivot, and with pivot fixed connection, many the bracing piece orientation the one end of pivot all is fixed in telescopic peripheral surface.

According to some embodiments of the present invention, at least one first heat sink is further disposed in the accommodating chamber, and the first heat sink is fixedly connected to the housing.

According to some embodiments of the invention, at least one second fin is fixed to an outer surface of the housing.

According to the utility model discloses a chassis of second aspect embodiment, including foretell arresting gear, still include semi-axis and axle housing, the pivot one end with semi-axis fixed connection, the casing with axle housing fixed connection.

According to the utility model discloses chassis has following beneficial effect at least: the braking device has good sealing performance, is not easy to be corroded by rainwater, is favorable for reducing the maintenance cost of the chassis, prolongs the service life of the chassis and improves the safety performance of the chassis.

According to a third aspect embodiment of the present invention, a vehicle includes the above-described chassis.

According to the utility model discloses vehicle has following beneficial effect at least: by using the chassis, the maintenance cost of the vehicle is reduced, the service life of the vehicle is prolonged, and the safety performance of the vehicle is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic view of an internal structure of a brake device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the brake apparatus of FIG. 1;

fig. 3 is a perspective view of the braking device of fig. 1.

Reference numerals: the heat dissipation structure comprises a shell assembly 100, a second heat dissipation fin 110, a first heat dissipation fin 120, a shell 130, a bottom shell 131, an upper cover 132 and an accommodating cavity 133;

brake assembly 200, strut 210, brake pad 220, pull rod 230, connecting rod 240, brake disc 250, driving element 260;

the heat dissipation assembly 300, the heat dissipation fan blade 310, the support rod 320 and the sleeve 330;

rotating shaft assembly 400, rotating shaft 410, mounting block 420 and bolt 430.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 to 3, a brake apparatus according to an embodiment of a first aspect of the present invention includes a housing 130, a brake assembly 200, and a rotary shaft assembly 400. A closed receiving chamber 133 is formed in the housing 130. A portion of the rotating shaft 410 is located in the accommodating cavity 133, and two ends of the rotating shaft 410 extend out of the housing 130, one end of the rotating shaft 410 is used for being fixedly connected with a half shaft, and the other end of the rotating shaft 410 is used for mounting a wheel. The rotating shaft 410 is rotatably connected with the housing 130, and the connection between the rotating shaft 410 and the housing 130 is sealed.

The brake assembly 200 includes a brake plate 220, a brake disc 250 and a driving member 260, and the brake assembly 200 is located in the receiving cavity 133. The brake disc 250 is fixedly connected with the rotating shaft 410, the brake pad 220 is connected with the shell 130, and the brake pad 220 can be abutted against or separated from the brake disc 250 under the action of the driving element 260.

In combination with the above, a portion of the rotating shaft 410 is located in the receiving cavity 133, thereby facilitating the installation of the brake disc 250. Both ends of the rotating shaft 410 extend out of the housing 130, one end of the rotating shaft 410 is used for being fixedly connected with a half shaft, i.e. the rotating shaft 410 can input torque of a power system, and the other end of the rotating shaft 410 is used for mounting a wheel, i.e. the rotating shaft 410 can output the input torque to the wheel. The rotating shaft 410 is rotatably connected with the housing 130, the brake disc 250 is fixedly connected with the rotating shaft 410, the brake pad 220 is connected with the housing 130, and under the action of the driving element 260, the brake pad 220 can be abutted against or separated from the brake disc 250, i.e. the brake pad 220 can brake or not brake.

Because the accommodating cavity 133 is closed, the connection between the rotating shaft 410 and the housing 130 is sealed, and the brake assembly 200 is located in the accommodating cavity 133, that is, the driving element 260, the brake pad 220 and the brake disc 250 are all located in the accommodating cavity 133, and the brake assembly 200 is located in the accommodating cavity 133 with better sealing performance, the brake assembly 200 is not easily corroded by external moisture, is not easily rusted, has a long service life, can continuously maintain the braking capability, and is beneficial to ensuring the driving safety.

Specifically, the housing 130 includes a bottom case 131 and an upper cover 132, a groove is formed on one side of the bottom case 131, the upper cover 132 covers the groove, and the upper cover is locked and fixed with the bottom case 131 by a screw, so that an accommodating cavity 133 is formed. In order to seal the accommodating cavity 133, a sealing ring is disposed on a joint surface of the upper cover 132 and the bottom casing 131, and a gap between the upper cover 132 and the bottom casing 131 can be sealed after the sealing ring is clamped by the upper cover 132 and the bottom casing 131.

In the conventional braking device, the bottom case 131 is used as a brake drum, that is, the inner side surface of the groove of the bottom case 131 is abutted against or separated from the brake pad 220, so as to achieve braking or non-braking. At this moment, bottom shell 131 is generally fixed with the wheel, and upper cover 132 is generally fixed with the axle housing of chassis, is relative rotation between bottom shell 131 and the upper cover 132, has the gap easily between the two, leads to inside easy intaking. The utility model discloses different from conventional arresting gear, brake disc 250 is an solitary part, and is arranged in holding chamber 133, and pivot 410 is sealed with casing 130's junction, realizes better sealing performance from this to waterproof rust-resistant.

Specifically, the rotating shaft 410 is rotatably connected to the housing 130 through bearings, that is, two bearings are sleeved on the rotating shaft 410, an outer ring of one bearing is fixedly connected to the upper cover 132, and an outer ring of the other bearing is fixedly connected to the bottom case 131. In order to realize the sealing of the joint between the rotating shaft 410 and the housing 130, the bearing and the rotating shaft 410 can be sealed in a contact manner, that is, an open-loop groove is formed on the bearing cover, a felt or a sealing ring is placed in the annular groove, and the felt (or the sealing ring) is in contact with the rotating shaft 410, so that the sealing is realized, and the sealing at the joint can meet the requirements of dust prevention and water prevention.

Specifically, in order to facilitate the installation of the wheel, the rotating shaft assembly 400 further includes an installation block 420 and a bolt 430, the installation block 420 is fixed at one end of the rotating shaft 410 for installing the wheel, a through hole is formed in the installation block 420, the bolt 430 is inserted into the through hole and is in interference fit with the through hole, the head of the bolt 430 abuts against the installation block 420, and the threaded portion of the bolt 430 extends out of the surface of the installation block 420. Thus, after the bolt 430 penetrates through the hub of the wheel, the nut is screwed, and the wheel can be mounted.

Referring to fig. 1, in some embodiments of the present invention, the brake pads 220 are provided with two pieces, and the driving element 260 is used for driving the two pieces of the brake pads 220 to approach or move away from the brake disc 250 at the same time. Therefore, one driving element 260 drives the two brake pads 220 to move together, and the two brake pads 220 simultaneously hold the brake disc 250 tightly, so that the braking performance is good. In addition, the structure can reduce the cost compared with the conventional structure that needs two driving elements 260 to drive the two brake pads 220 to move.

Referring to fig. 1, in a further embodiment of the present invention, the brake assembly 200 further comprises a connecting rod 240, two compression rods 210 and two tension rods 230. The two pressing rods 210 are respectively located at two sides of the radial direction of the brake disc 250, the two brake pads 220 are respectively fixed to the two pressing rods 210, and the brake pads 220 are located at one side of the pressing rods 210 facing the brake disc 250. One end of each of the two pressing rods 210 is rotatably connected to the housing 130, the other end of each of the two pressing rods 210 is rotatably connected to one end of each of the two pull rods 230, the other end of each of the two pull rods 230 is rotatably connected to both ends of the connecting rod 240, the middle of the connecting rod 240 is rotatably connected to the rotating shaft 410, and the driving element 260 is configured to drive one pressing rod 210 to rotate around the connection between the pressing rod 210 and the housing 130.

Thus, when the driving member 260 rotates one of the pressing rods 210 in a direction to approach the brake disc 250, the pressing rod 210 brings the corresponding brake pad 220 close to the brake disc 250, and at the same time, part of the kinetic energy is transmitted to the other pressing rod 210 through the pull rod 230, the connecting rod 240 and the pull rod 230, so that the other pressing rod 210 brings the corresponding brake pad 220 close to the brake disc 250. Then, the two brake pads 220 hold the brake disc 250 together to realize braking. Similarly, when the driving member 260 drives one of the levers 210 to rotate away from the brake disc 250, the two brake pads 220 move away from the brake disc 250 together.

Specifically, the connection between the connecting rod 240 and the rotating shaft 410 can be achieved through a bearing, that is, an inner ring of the bearing is fixedly connected with the rotating shaft 410 (the inner ring of the bearing can be limited by a shoulder and a snap spring to slide along the axial direction of the rotating shaft 410), and an outer ring of the bearing is fixedly connected with the connecting rod 240 (in an interference fit manner).

In addition, in order to achieve the purpose that one driving element 260 drives two brake pads 220 to move together, the driving element 260 may also adopt a double-piston type wheel cylinder, at this time, the brake assembly 200 includes the double-piston type wheel cylinder, a brake disc 250, two pressing rods 210 and two brake pads 220, the two pressing rods 210 are respectively located at two sides of the brake disc 250 in the radial direction, the two brake pads 220 are respectively fixed to the two pressing rods 210, and the brake pads 220 are located at one side of the pressing rods 210 facing the brake disc 250. One end of each of the two pressure levers 210 is rotatably connected to the housing 130, and the other end of each of the two pressure levers 210 is rotatably connected to two pistons of the double-piston wheel cylinder. Therefore, after the double-piston type wheel cylinder is communicated with the oil way, the two brake pads 220 can be driven to simultaneously approach or separate from the brake disc 250.

Referring to fig. 2 and 3, in some embodiments of the present invention, the braking device further includes a heat dissipation assembly 300, the heat dissipation assembly 300 includes a plurality of heat dissipation blades 310, the plurality of heat dissipation blades 310 are located outside the housing 130 and are fixedly connected to the rotating shaft 410, and the plurality of heat dissipation blades 310 are symmetrical with respect to the center of the rotating shaft 410.

The heat dissipating fan 310 is fixedly connected to the rotating shaft 410, and when the rotating shaft 410 rotates, the heat dissipating fan 310 drives the air in the environment to flow, so as to accelerate the heat exchange between the air in the environment and the housing 130, thereby achieving heat dissipation. By dissipating heat from the brake device, the braking performance of the brake pads 220 and the brake disc 250 can be maintained, and failure of the braking performance due to high temperature can be avoided.

In addition, the plurality of heat dissipation fan blades 310 are symmetrical with respect to the center of the axis of the rotating shaft 410, so that the runout caused by centrifugal force when the rotating shaft 410 rotates can be reduced, noise can be reduced, and power loss can be reduced.

Specifically, the heat dissipation fan 310 may be directly fixed on the rotating shaft 410. Because the heat of the braking device is mostly generated by the friction between the brake pad 220 and the brake disc 250, the brake disc 250 is located at the middle position of the shell 130, the rotating shaft 410 is also located at the middle position of the shell 130, and the heat generated by the friction can be quickly dissipated to the outside by directly fixing the heat dissipation fan blade 310 on the rotating shaft 410, so that the heat dissipation efficiency is high.

Referring to fig. 2 and 3, in a further embodiment of the present invention, the heat dissipation assembly 300 further includes a plurality of support rods 320, the number of the support rods 320 is the same as that of the heat dissipation fan blades 310, the single heat dissipation fan blade 310 is fixed to one end of one support rod 320, the other end of the support rod 320 is fixed to the rotating shaft 410, the housing 130 is disc-shaped, and the plurality of heat dissipation fan blades 310 are distributed along the circumferential direction of the housing 130.

The disc-shaped housing 130 is flat, and the brake device has a small dimension in the axial direction of the rotating shaft 410, and occupies a small space. The heat dissipation blades 310 are distributed in the circumferential direction of the housing 130, and when the heat dissipation blades 310 move, the heat dissipation blades can dissipate heat from the housing 130, so that the braking performance of the brake pad 220 and the brake disc 250 is maintained. In addition, the heat dissipation fan blades 310 are distributed in the circumferential direction of the housing 130 through the support rods 320, so that the axial size of the braking device along the rotating shaft 410 can be further reduced, and the occupied space can be reduced.

Referring to fig. 2, in a further embodiment of the present invention, the heat dissipation assembly 300 further includes a sleeve 330, the sleeve 330 is sleeved on the rotating shaft 410 and is fixedly connected to the rotating shaft 410, and one ends of the support rods 320 facing the rotating shaft 410 are all fixed to the outer circumferential surface of the sleeve 330.

Through setting up sleeve 330, can integrate into a fixed part of structure with many spinal branchs vaulting pole 320 to easy to assemble practices thrift installation time. In addition, by providing the sleeve 330, the heat dissipation assembly 300 can be processed and assembled in advance, and finally the heat dissipation assembly 300 is mounted, thereby increasing the production efficiency.

Specifically, the support rod 320 may be welded to the sleeve 330, and the sleeve 330 may be fixed to the shaft 410 by a key and a set screw.

Referring to fig. 1 and 2, in some embodiments of the present invention, at least one first heat sink 120 is further disposed in the accommodating cavity 133, and the first heat sink 120 is fixedly connected to the housing 130. By adding the first heat sink 120, the contact area between the housing 130 and the air in the accommodating cavity 133 can be increased, thereby increasing the heat exchange speed and the heat dissipation efficiency.

Referring to fig. 1 and 2, in a further embodiment of the present invention, at least one second heat sink 110 is fixed to the outer surface of the housing 130, and in this case, the second heat sink 110, the first heat sink 120 and the housing 130 together constitute the housing assembly 100. Similarly, the second heat sink 110 can increase the contact area between the housing 130 and the outside air, thereby increasing the heat exchange speed and the heat dissipation efficiency.

Referring to fig. 1 and 2, in a further embodiment of the present invention, the second heat sinks 110 and the first heat sinks 120 are the same in number and have a one-to-one correspondence in position. The first heat sink 120 can increase the heat absorption speed, the second heat sink 110 can increase the heat dissipation speed, and the heat absorption speed and the heat dissipation speed can be matched by corresponding the positions of the first heat sink 120 and the second heat sink 110, thereby improving the overall heat dissipation efficiency.

According to the utility model discloses a chassis of second aspect embodiment, including foretell arresting gear, still include semi-axis and axle housing, the one end and the semi-axis fixed connection of pivot 410, casing 130 and axle housing fixed connection. The sealing performance of the braking device is good, and the braking device is not easy to be corroded by rainwater, so that the maintenance cost of the chassis is reduced, the service life of the chassis is prolonged, and the safety performance of the chassis is improved.

Specifically, for a small-sized vehicle (such as a car), one end of the rotating shaft 410 is fixedly connected with the half shaft through a spline, and for a large-sized vehicle (such as a truck), one end of the rotating shaft 410 is fixedly locked with the half shaft through a flange, that is, one flange is fixed to one end of the rotating shaft 410, one flange is fixed to one end of the half shaft, and the two flanges are fixed through bolts and nuts, so that the fixed connection between the rotating shaft 410 and the half shaft is realized.

According to a third aspect embodiment of the present invention, a vehicle includes the above-described chassis. By using the chassis, the maintenance cost of the vehicle is reduced, the service life of the vehicle is prolonged, and the safety performance of the vehicle is improved.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A brake apparatus, comprising:

2. A brake arrangement according to claim 1, wherein the brake pads are provided in two pieces and the actuating member is adapted to urge the two brake pads towards and away from the brake disc simultaneously.

3. The brake device of claim 2, wherein the brake assembly further comprises a connecting rod, two pressing rods and two pulling rods, the two pressing rods are respectively located at two sides of the brake disc in the radial direction, the two brake pads are respectively fixed to the two pressing rods, the brake pads are located at one side of the pressing rods facing the brake disc, one ends of the two pressing rods are rotatably connected to the housing, the other ends of the two pressing rods are respectively rotatably connected to one ends of the two pulling rods, the other ends of the two pulling rods are respectively rotatably connected to two ends of the connecting rod, the middle portion of the connecting rod is rotatably connected to the rotating shaft, and the driving element is configured to drive one pressing rod to rotate around the housing.

4. The brake device according to claim 1, further comprising a heat dissipation assembly, wherein the heat dissipation assembly comprises a plurality of heat dissipation blades, the plurality of heat dissipation blades are located outside the housing and are fixedly connected with the rotating shaft, and the plurality of heat dissipation blades are centrosymmetric with respect to an axis of the rotating shaft.

5. The brake apparatus according to claim 4, wherein the heat dissipation assembly further comprises a plurality of support rods, the number of the support rods is the same as that of the heat dissipation fan blades, and a single heat dissipation fan blade is fixed to one end of one of the support rods, the other end of the support rod is fixed to the rotating shaft, the housing is in a disc shape, and a plurality of heat dissipation fan blades are distributed along a circumferential direction of the housing.

6. The brake device according to claim 5, wherein the heat dissipation assembly further comprises a sleeve, the sleeve is sleeved on the rotating shaft and is fixedly connected with the rotating shaft, and one ends of the support rods facing the rotating shaft are fixed to the outer circumferential surface of the sleeve.

7. The brake device according to claim 1, wherein at least one first heat sink is further disposed in the accommodating chamber, and the first heat sink is fixedly connected to the housing.

8. A braking apparatus in accordance with claim 1 or 7, characterised in that at least one second heat sink is secured to an outer surface of the housing.

9. A chassis comprising a braking device as claimed in any one of claims 1 to 8, and further comprising axle shafts and axle housings, said one end of said shaft being fixedly connected to said axle shafts, and said housing being fixedly connected to said axle housings.

10. A vehicle comprising the chassis of claim 9.