CN114321235A

CN114321235A - Unilateral brake structure and bilateral brake structure

Info

Publication number: CN114321235A
Application number: CN202011030462.XA
Authority: CN
Inventors: 李遵富
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2022-04-12

Abstract

The invention relates to the technical field of motor vehicles. The brake disc and the extrusion device are coaxially arranged on a wheel shaft, the extrusion device of a mechanical structure or a hydraulic structure is used for pressing the brake disc on the brake disc for braking, and a spring is used for resetting the brake disc when the braking is released. Because the brake block on the brake disc can the whole and brake disc contact of annular, compare with the local contact form of current brake structure, braking effect is good and the noise is low, and the brake is more steady, and brake block wearing and tearing are little, life cycle length.

Description

Unilateral brake structure and bilateral brake structure

Technical Field

The invention relates to the technical field of motor vehicles, in particular to a single-side brake structure and a double-side brake structure.

Background

Currently, the braking devices used in the market are roughly classified into the following types. Band brake, drum brake, expansion brake, disc brake, iron brake, etc. each have their advantages and disadvantages. The specific defects are high noise, inflexible braking and unstable braking. The oil brake is heavy, the cost is high, the brake oil needs to be replaced regularly, and some oil leaks easily.

In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.

Disclosure of Invention

In order to solve the technical defects, the invention provides a single-side brake structure and a double-side brake structure, which have the advantages of simple structure, low cost, convenience in installation, low noise, long service life and stable braking.

The technical scheme adopted by the invention is as follows:

on one hand, the single-side brake structure comprises a brake disc, a return spring and an extrusion device;

the brake disc is fixed on a wheel hub of the wheel;

the extrusion device is fixed on a wheel shaft of the wheel;

the brake disc is arranged on a wheel shaft of the wheel, is positioned between the brake disc and the extrusion device, can move along the axial direction of the wheel shaft and cannot rotate, and the inner side surface of the brake disc is close to the brake disc and is fixed with a brake pad;

the return spring is arranged between the brake disc and the brake disc;

in a braking state, the extrusion device pushes the brake disc to move towards the brake disc, so that the return spring is deformed to store energy, and the brake disc is pressed by the brake pad, so that the wheel is subjected to friction braking;

in the brake releasing state, the extrusion device does not apply force to the brake disc, and the brake pad is separated from the brake disc under the action of the return spring, so that the brake of the wheel is released.

Furthermore, the brake pad is annular, arranges on the medial surface of brake disc along circumference, and under the braking state, the interior annular surface of brake pad all with the brake disc contact.

Further, the extruding device comprises an extruding disc which is rotatably connected to the wheel shaft and has a fixed axial position relative to the wheel shaft; the inner side surface of the extrusion disc is opposite to the outer side surface of the brake disc;

a plurality of first helical teeth are uniformly arranged on the inner side surface of the extrusion disc along the circumferential direction, and the inclination direction and the inclination angle of the tooth surface of the first helical teeth are the same;

a plurality of second helical teeth are uniformly arranged on the outer side surface of the brake disc along the circumferential direction, and the inclination direction of the tooth surface of the second helical teeth is the same as the inclination angle;

the first helical teeth and the second helical teeth are the same in number and corresponding in position, and have opposite inclination directions and the same inclination angles;

in a braking state, the extrusion disc rotates forward for a certain angle, the corresponding first helical teeth and the corresponding second helical teeth are attached, so that the high tooth ends of the first helical teeth and the second helical teeth are gradually close to each other, and the brake disc is pushed to move towards the brake disc;

and under the condition of releasing the braking, the extrusion disc rotates reversely for a certain angle, and the brake pad is separated from the brake disc.

Furthermore, the extrusion device also comprises a return spring, wherein the return spring is connected with the wheel shaft and the extrusion disc and is used for storing energy in a braking state and releasing energy to drive the extrusion disc to rotate reversely in a braking-released state.

Furthermore, a driving end is arranged on the extrusion disc, a pull wire hole is arranged on the driving end, and the pull wire hole is used for being connected with a brake cable.

Furthermore, the extrusion device comprises a hydraulic cylinder body, the hydraulic cylinder body is fixed on a wheel shaft of the wheel, a hydraulic cavity with an opening on one side and an oil injection channel are arranged on the hydraulic cylinder body, the oil injection channel is used for injecting pressure oil into the hydraulic cavity, a piston is arranged in the hydraulic cavity, the opening end of the hydraulic cavity faces the outer side surface of the brake disc, and the piston can axially move along the hydraulic cavity under the action of the pressure oil so that the front end of the piston extends out of the opening end to push the brake disc.

Furthermore, a plurality of hydraulic cavities are arranged on the hydraulic cylinder body, and a piston is arranged in each hydraulic cavity.

On the other hand, a bilateral brake structure is provided, which comprises a brake disc, a first brake disc, a second brake disc, a return spring, a linkage rod, a linkage disc and an extrusion device;

the brake disc is fixed on a wheel hub of the wheel;

the first brake disc, the second brake disc and the linkage disc are mounted on a wheel shaft of the wheel, can move along the axial direction of the wheel shaft and cannot rotate; the first brake disc and the second brake disc are respectively positioned at two sides of the brake disc, the second brake disc is positioned between the first brake disc and the linkage disc, and brake pads are respectively fixed on opposite surfaces of the first brake disc and the second brake disc;

the linkage rod penetrates through the second brake disc, two ends of the linkage rod are respectively and fixedly connected with the first brake disc and the linkage disc, and the second brake disc can move along the axial direction of the linkage rod;

the return spring is arranged between the first brake disc and the second brake disc;

the extrusion device is fixed on a wheel shaft of the wheel and positioned between the second brake disc and the linkage disc;

in a braking state, the extruding device pushes the second brake disc and the linkage disc towards two sides respectively to enable the second brake disc to move towards the direction of the brake disc, the linkage disc drives the first brake disc to move towards the direction of the brake disc, the reset spring deforms to store energy, and finally, brake pads on the first brake disc and the second brake disc press the brake disc from two sides of the brake disc respectively so as to perform friction braking;

in the brake releasing state, the extrusion device does not apply force to the second brake disc and the linkage disc, and the brake pad is separated from the brake disc under the action of the return spring, so that the brake of the wheel is released.

Furthermore, the brake pad is annular, arranges on the relative face of first brake disc with the second brake disc along circumference, and under the braking state, the interior annular surface of brake pad all with the brake disc contact.

Further, the extruding device comprises an extruding disc which is rotatably connected to the wheel shaft and has a fixed axial position relative to the wheel shaft; the inner side surface of the extrusion disc is opposite to the outer side surface of the second brake disc, and the outer side surface of the extrusion disc is opposite to the inner side surface of the linkage disc;

a plurality of first helical teeth are uniformly arranged on the inner side surface of the extrusion disc along the circumferential direction, and the inclination direction and the inclination angle of the tooth surface of the first helical teeth are the same; a plurality of third helical teeth are uniformly arranged on the outer side surface of the extrusion disc along the circumferential direction, and the inclination direction of the tooth surface of the third helical teeth is the same as the inclination angle; the first helical teeth and the third helical teeth are inclined in opposite directions;

a plurality of second inclined teeth are uniformly arranged on the outer side surface of the second brake disc along the circumferential direction, and the inclined direction and the inclined angle of the tooth surface of the second inclined teeth are the same;

a plurality of fourth helical teeth are uniformly arranged on the inner side surface of the linkage disc along the circumferential direction, and the inclination direction of the tooth surface of each fourth helical tooth is the same as the inclination angle of the tooth surface of each fourth helical tooth;

the first helical teeth and the second helical teeth are the same in number and corresponding in position, and have opposite inclination directions and the same inclination angles; the third helical teeth and the fourth helical teeth are the same in number and corresponding in position, and have opposite inclination directions and the same inclination angles;

under the braking state, the extrusion disc rotates forward for a certain angle, the corresponding first helical teeth are attached to the second helical teeth, the corresponding third helical teeth are attached to the fourth helical teeth, so that the high tooth ends of the first helical teeth are gradually close to the high tooth ends of the second helical teeth, the high tooth ends of the third helical teeth are gradually close to the high tooth ends of the fourth helical teeth, and the second brake disc and the linkage disc are further pushed towards two sides respectively;

and under the condition of releasing the braking, the extrusion disc reversely rotates for a certain angle under the action of the return spring.

Furthermore, the extrusion device comprises a hydraulic cylinder body, the hydraulic cylinder body is fixed on a wheel shaft of the wheel, a hydraulic cavity and an oil injection passage are arranged on the hydraulic cylinder body, the oil injection passage is used for injecting pressure oil into the hydraulic cavity, the hydraulic cavity penetrates through the hydraulic cylinder body, at least one group of pistons are arranged in the hydraulic cavity, each group of pistons comprises two pistons in opposite directions, the two pistons can axially move in opposite directions along the hydraulic cavity under the action of the pressure oil, and the front ends of the two pistons respectively extend out of the two side opening ends of the hydraulic cavity to further respectively push the second brake disc and the linkage disc.

Furthermore, a plurality of hydraulic cavities are arranged on the hydraulic cylinder body, at least one group of pistons are arranged in each hydraulic cavity, and each group of pistons comprises two pistons in opposite directions.

Furthermore, the extrusion device comprises a hydraulic cylinder body, the hydraulic cylinder body is fixed on a wheel shaft of the wheel, a first hydraulic cavity, a second hydraulic cavity and an oil injection channel are arranged on the hydraulic cylinder body, the oil injection channel is used for injecting pressure oil into the first hydraulic cavity and the second hydraulic cavity respectively, the first hydraulic cavity and the second hydraulic cavity are both provided with one-side openings, the opening directions of the first hydraulic cavity and the second hydraulic cavity are opposite, the first hydraulic cavity and the second hydraulic cavity face the second brake disc and the linkage disc respectively, and the first hydraulic cavity and the second hydraulic cavity are arranged on the hydraulic cylinder body in a staggered mode; and a piston is arranged in the first hydraulic cavity and the second hydraulic cavity, and can axially move along the hydraulic cavity under the action of pressure oil, so that the front end of the piston extends out of the opening end of the corresponding hydraulic cavity.

Furthermore, be equipped with a plurality of first hydraulic pressure chambeies and second hydraulic pressure chamber on the hydraulic cylinder body, the quantity in first hydraulic pressure chamber and second hydraulic pressure chamber is the same, all is equipped with a piston in every hydraulic pressure intracavity.

Further, the linkage rod passes through the hydraulic cylinder.

Compared with the prior art, the invention has the beneficial effects that:

according to the brake structure provided by the invention, the brake disc and the extrusion device are coaxially arranged on the wheel shaft, the extrusion device of a mechanical structure or a hydraulic structure is utilized to press the brake disc on the brake disc for braking, and the spring is utilized to reset the brake disc when the braking is released. Because the brake block on the brake disc can the whole and brake disc contact of annular, compare with the local contact form of current brake structure, braking effect is good and the noise is low, and the brake is more steady, and the little life cycle of brake block wearing and tearing is long.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic view of a mechanical squeeze one-sided brake configuration of an embodiment of the present invention;

FIG. 2 shows a schematic view of the toothed side of the crush disk of the mechanically crushed single sided brake configuration of an embodiment of the present invention;

FIG. 3 illustrates a perspective view of a crush disk of a mechanically crushed single sided brake configuration in accordance with an embodiment of the present invention;

FIG. 4 shows a schematic view of a mechanically squeezed double-sided brake configuration of an embodiment of the present invention;

FIG. 5 shows a schematic diagram of a hydraulic squeeze double-sided brake configuration of an embodiment of the present invention;

FIG. 6 shows a schematic diagram of a dual piston hydraulic cylinder with through hydraulic chambers for a hydraulically squeezed double sided brake configuration of an embodiment of the present invention;

FIG. 7 illustrates a schematic diagram of a hydraulic cylinder having double-sided hydraulic chambers of a hydraulic squeeze double-sided brake structure according to an embodiment of the present invention;

FIG. 8 illustrates a cross-sectional view of a hydraulic cylinder having double-sided hydraulic chambers of a hydraulic squeeze double-sided brake structure according to an embodiment of the present invention;

fig. 9 shows a schematic view of a hydraulic cylinder having a single-sided hydraulic chamber of a hydraulic squeeze single-sided brake structure according to an embodiment of the present invention.

Detailed Description

The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The invention discloses a unilateral brake structure, which comprises a brake disc, a return spring and an extrusion device, wherein the brake disc is fixedly arranged on the brake disc; the brake disc is fixed on the wheel hub of the wheel; the extrusion device is fixed on a wheel shaft of the wheel; the brake disc is arranged on a wheel shaft of the wheel, is positioned between the brake disc and the extrusion device, can move along the axial direction of the wheel shaft and cannot rotate, and the inner side surface of the brake disc is close to the brake disc and is fixed with a brake pad; the return spring is arranged between the brake disc and the brake disc. In a braking state, the extrusion device pushes the brake disc to move towards the brake disc, so that the return spring is deformed to store energy, and the brake disc is pressed by the brake pad, thereby performing friction braking on the wheel; in the brake releasing state, the extrusion device does not apply force to the brake disc, and the brake pad is separated from the brake disc under the action of the return spring, so that the brake of the wheel is released.

As a typical one-side brake structure implementation, fig. 1 shows a schematic diagram of a mechanical compression one-side brake structure, as shown in fig. 1, a brake disc 1 is fixed on a hub of a wheel, and the center of the brake disc 1 is located on the center line of a wheel shaft. The brake disc 3 is mounted on the wheel axle 7 of the wheel, the brake disc 3 can move along the axial direction of the wheel axle 7, namely can get close to or get away from the brake disc 1, and the brake disc 3 can not rotate. Reset spring 6 sets up between brake disc 3 and brake disc 1, and when brake disc 3 was close to brake disc 1, reset spring 6 atress deformation. Brake block 2 is fixed with to the medial surface of brake disc 3, and brake block 2 arranges along the circumference, can a plurality of intervals arrange, also can form wholly and encircle, and during the brake, brake block 2 contacts (whole dish brake) with brake disc 1 on a circumference comprehensively or multiposition, and braking effect is good and steady, and wearing and tearing are also even, long service life, and the noise is little.

The extrusion device adopts a mechanical structure, the extrusion disc 4 is rotatably connected on the wheel shaft 7, and the center of the extrusion disc is positioned on the central line of the wheel shaft 7. The pressing disc 4 is located outside the brake disc 3, i.e. the brake disc 3 is located between the pressing disc 4 and the brake disc 1. The pressing disk 4 can rotate but cannot move axially. The inner side surface of the extrusion disc 4 is uniformly provided with a plurality of first helical teeth 41 along the circumferential direction, and the inclined direction and the inclined angle of the tooth surface of the first helical teeth are the same. The outer side surface of the brake disk 3 is provided with a plurality of second helical teeth 31 uniformly along the circumferential direction, and the inclined direction and the inclined angle of the tooth surface are the same. The first helical teeth 41 and the second helical teeth 31 have the same number and the corresponding positions, and the first helical teeth 41 and the second helical teeth 31 have the same inclination angle and the opposite inclination directions.

The specific braking action is as follows: under the driving state of the vehicle, the extrusion disc 4 is attached to the brake disc 3 or the extrusion disc 4 has a gap with the brake disc 3, and each first helical tooth 41 is opposite to the tooth surface of each second helical tooth 31. During braking, the driving extrusion disc 4 rotates forward by a certain angle, the corresponding first helical tooth 41 is attached to the second helical tooth 31, and it can be understood that the first helical tooth 41 and the second helical tooth 31 are opposite in inclination direction and same in inclination angle, the high tooth end 411 of the corresponding first helical tooth 41 is gradually close to the high tooth end 311 of the second helical tooth 31, and the tooth height is gradually increased and the extrusion disc 4 cannot move axially, so that the extrusion disc 4 pushes the brake disc 3 to move towards the brake disc 1 until the brake disc 2 compresses the brake disc 1, and further the rotation of the brake disc 1 is prevented from braking. At this time, the deformation amount of the return spring 6 is maximum, and energy storage is completed. When the brake is released, the driving force of the extrusion disc 4 disappears, the extrusion disc 4 does not apply force to the brake disc 3, the brake disc 3 is pushed to be far away from the brake disc 1 under the action of the reset spring 6, the extrusion disc 4 is driven to rotate reversely until the initial state is restored, and the brake release is completed.

Preferably, the pressing disc 4 is provided with a return spring 5, the return spring 5 stores energy when the pressing disc 4 rotates in the forward direction (during braking), and releases energy to drive the pressing disc 4 to rotate in the reverse direction when the braking state is released, so that the return spring 6 is ensured to smoothly push the brake disc 3 to reset. The return spring 6 can be a multi-claw steel sheet spring.

As an example, the extrusion disc 4 is provided with a driving end 8, and the driving end 8 is provided with a pull wire hole 9 which is used for connecting a brake cable. Namely, the extrusion disc 4 can be driven to rotate positively through the wire brake structure, and the extrusion disc is suitable for motorcycles or micro motor vehicles and the like. Of course, the extrusion disc 4 can also be driven by a motor or the like, so that higher braking force can be obtained.

FIGS. 2 and 3 illustrate the construction of an extruded disc in one example; as shown in the figure, the periphery of the inner side surface of the extrusion disc 4 is provided with four first helical teeth 41 connected end to end, and the high tooth end 411 of the previous first helical tooth 41 is connected with the low tooth end 412 of the next first helical tooth 41 to form a height-and-height difference structure. The tooth surface structure on the brake disc 3 corresponds to the pressing disc 4.

The invention also discloses and provides a bilateral brake structure which comprises a brake disc, a first brake disc, a second brake disc, a return spring, a linkage rod, a linkage disc and an extrusion device. The brake disc is fixed on the wheel hub of the wheel; the first brake disc, the second brake disc and the linkage disc are arranged on a wheel shaft of the wheel, can move along the axial direction of the wheel shaft and cannot rotate; first brake disc and second brake disc are located the brake disc both sides respectively, and the second brake disc is located between first brake disc and the linkage dish, are fixed with the brake block on the opposite face of first brake disc and second brake disc respectively. The linkage rod passes through the second brake disc, and its both ends respectively with first brake disc and linkage dish fixed connection, the axial displacement of linkage rod can be followed to the second brake disc. The return spring is arranged between the first brake disc and the second brake disc. The squeezing device is fixed on the wheel shaft of the wheel and is positioned between the second brake disc and the linkage disc. Under the braking state, the extrusion device pushes the second brake disc and the linkage disc to two sides respectively, the second brake disc moves towards the direction of the brake disc, the linkage disc drives the first brake disc to move towards the direction of the brake disc, the reset spring deforms to store energy, and finally the brake pads on the first brake disc and the second brake disc compress the brake disc from two sides of the brake disc respectively, so that friction braking is realized. In the brake releasing state, the extrusion device does not apply force to the second brake disc and the linkage disc, and the brake pad is separated from the brake disc under the action of the return spring, so that the brake of the wheel is released.

Fig. 4 shows a schematic diagram of a mechanical compression double-sided brake structure according to an embodiment of the present invention, as a typical double-sided brake structure embodiment, and as shown in fig. 4, a brake disc 1 is fixed on a hub of a wheel through a screw hole 11, and the center of the brake disc 1 is located on the center line of a wheel shaft 7. The first brake disc 50, the second brake disc 30 and the linkage disc 80 are all mounted on the wheel shaft 7 of the wheel and can move along the axial direction of the wheel shaft 7, namely, can get close to or get away from the brake disc 1, and the first brake disc 50, the second brake disc 30 and the linkage disc 80 can not rotate. The first brake disc 50 and the second brake disc 30 are respectively positioned at two sides of the brake disc 1, the second brake disc 30 is positioned between the first brake disc 50 and the linkage disc 80, and the

brake pads

40 and 20 are respectively fixed on the opposite surfaces of the first brake disc 50 and the second brake disc 30. The

brake pads

40, 20 are circumferentially arranged, may be arranged at a plurality of intervals, or may be integrally formed into a ring shape, and when braking, the

brake pads

40, 20 are in full or multi-position contact with both sides of the brake disc 1 on the circumference (full disc braking). The linkage rod 60 passes through the second brake disc 30, and both ends of the linkage rod are respectively fixedly connected with the first brake disc 50 and the linkage disc 80, and the second brake disc 30 can move along the axial direction of the linkage rod 60. The return spring 6 is disposed between the first brake disk 50 and the second brake disk 30, and the return spring 6 is deformed when the first brake disk 50 and the second brake disk 30 approach the brake disk 1.

The extrusion device is of a mechanical structure, and the extrusion disc 4 is rotatably connected to the wheel shaft 7, has a center on the center line of the wheel shaft 7, and has a fixed axial position relative to the wheel shaft 7, i.e. cannot move axially along the wheel shaft 7. The pressing disk 4 is positioned between the second brake disk 30 and the linkage disk 80, the inner side surface of the pressing disk 4 is opposite to the outer side surface of the second brake disk 30, and the outer side surface of the pressing disk 4 is opposite to the inner side surface of the linkage disk 80. The inner side surface of the extrusion disc 4 is uniformly provided with a plurality of first helical teeth 41 along the circumferential direction, the inclined direction and the inclined angle of the tooth surface of the first helical teeth are the same, the outer side surface of the extrusion disc 4 is uniformly provided with a plurality of third helical teeth 42 along the circumferential direction, the inclined direction and the inclined angle of the tooth surface of the third helical teeth are the same, and the inclined directions of the first helical teeth 41 and the third helical teeth 42 are opposite. The outer side surface of the second brake disk 30 is provided with a plurality of second helical teeth 301 uniformly in the circumferential direction, and the tooth surface thereof has the same inclination direction and inclination angle. The inner side surface of the link plate 80 is provided with a plurality of fourth helical teeth 801 uniformly in the circumferential direction, and the inclination direction and the inclination angle of the tooth surface are the same. The number of the first helical teeth 41 is the same as that of the second helical teeth 301, the positions of the first helical teeth 41 correspond to those of the second helical teeth 301, and the inclination directions of the first helical teeth 41 are opposite to those of the second helical teeth 301, and the inclination angles of the first helical teeth 41 are the same as those of the second helical teeth 301; the third helical teeth 42 and the fourth helical teeth 801 are the same in number and position, and the third helical teeth 42 and the fourth helical teeth 801 are opposite in inclination direction and identical in inclination angle.

The specific braking action is as follows: in a vehicle driving state, the pressing disc 4 is attached to the second brake disc 30 and the interlocking disc 80 or the pressing disc 4 has a gap with the second brake disc 30 and the interlocking disc 80, the first helical teeth 41 face the second helical teeth 301, and the third helical teeth 42 face the fourth helical teeth 801. When braking, the pressing disc 4 is driven to rotate forward by a certain angle, the corresponding first helical tooth 41 is attached to the second helical tooth 301, and the third helical tooth 42 is attached to the fourth helical tooth 801, it can be understood that, because the first helical tooth 41 and the second helical tooth 301 have opposite inclination directions and the same inclination angle, the third helical tooth 42 and the fourth helical tooth 801 have opposite inclination directions and the same inclination angle, the high tooth end 411 of the corresponding first helical tooth 41 and the high tooth end 3011 of the second helical tooth 301 gradually approach each other, the high tooth end 421 of the corresponding third helical tooth 42 and the high tooth end 8011 of the fourth helical tooth 801 gradually approach each other, because the tooth heights gradually increase and the pressing disc 4 cannot move axially, the pressing disc 4 pushes the second brake disc 30 to move towards the brake disc 1, the pressing disc 4 pushes the linkage disc 80 to move away from the brake disc 1, the linkage disc 80 drives the first brake disc 50 to move towards the brake disc 1 through the linkage rod 60, until the brake pads 40 and 20 press the two sides of the brake disc 1, thereby preventing the rotation of the brake disc 1 to brake. At this time, the deformation amount of the return spring 6 is maximum, and energy storage is completed. When the brake is released, the driving force of the extrusion disc 4 disappears, the extrusion disc 4 does not apply force to the second brake disc 30 and the linkage disc 80, the first brake disc 50 and the second brake disc 30 are pushed to be away from the brake disc 1 under the action of the return spring 6, the extrusion disc 4 is driven to rotate reversely until the initial state is restored, and the brake release is completed.

As a preferable scheme, the return spring 6 is sleeved on the linkage rod 60, the linkage rod 60 is provided with a plurality of return springs 6, the linkage rod 60 can be connected to the first brake disc 50 and the linkage disc 80 by bolts through threads, and the nut 61 is located on the inner side of the first brake disc 50.

Fig. 5 shows a schematic view of a hydraulic-compression double-sided brake structure of an embodiment of the present invention, and fig. 6 shows a schematic view of a double-piston hydraulic cylinder having a through hydraulic chamber of the hydraulic-compression double-sided brake structure of the embodiment of the present invention, as a typical double-sided brake structure embodiment. As shown in fig. 5 and 6, the brake disc 1 is fixed on the hub of the wheel through the screw hole 11, and the center of the brake disc 1 is located on the center line of the wheel shaft 7. The first brake disc 50, the second brake disc 30 and the linkage disc 80 are all mounted on the wheel shaft 7 of the wheel and can move along the axial direction of the wheel shaft 7, namely, can get close to or get away from the brake disc 1, and the first brake disc 50, the second brake disc 30 and the linkage disc 80 can not rotate. The first brake disc 50 and the second brake disc 30 are respectively positioned at two sides of the brake disc 1, the second brake disc 30 is positioned between the first brake disc 50 and the linkage disc 80, and the

brake pads

As shown in fig. 5 and 6, the pressing device has a hydraulic structure, and includes a hydraulic cylinder 90, the hydraulic cylinder 90 is fixed on the wheel axle 7 of the wheel and is unable to rotate and move axially, a hydraulic cavity 91 and an oil injection channel 92 are provided on the hydraulic cylinder 90, the oil injection channel 92 is used for injecting pressure oil into the hydraulic cavity 91, the hydraulic cavity 91 penetrates through the hydraulic cylinder 90, a piston 93 is provided in the hydraulic cavity 91, the piston 93 is two

pistons

931 and 932 in opposite directions, the two

pistons

931 and 932 can move axially in opposite directions along the hydraulic cavity 91 under the action of the pressure oil, so that the front ends of the two

pistons

931 and 932 respectively extend out of the two side open ends of the hydraulic cavity 91 to further respectively push the second brake disc 30 and the linkage disc 80.

The specific braking action is as follows: in the vehicle running state, the

pistons

931, 932 are located in the hydraulic chamber 91. During braking, pressure oil is injected into the hydraulic chamber 91 through the oil injection passage 92, and the two

pistons

931 and 932 in opposite directions axially move in opposite directions, so that the front ends of the two

pistons

931 and 932 respectively extend out of the two side opening ends of the hydraulic chamber 91 to respectively push the second brake disc 30 and the linkage disc 80. The linkage disc 80 drives the first brake disc 50 to move towards the brake disc 1 through the linkage rod 60 until the

brake pads

40 and 20 press two sides of the brake disc 1, so that the rotation of the brake disc 1 is prevented from braking. At this time, the deformation amount of the return spring 6 is maximum, and energy storage is completed. When the brake is released, the pressure oil is stopped from being injected into the hydraulic chamber 91, the

pistons

931 and 932 do not apply force to the second brake disk 30 and the interlocking disk 80, the first brake disk 50 and the second brake disk 30 are pushed away from the brake disk 1 by the action of the return spring 6, the

pistons

931 and 932 return to the initial positions, and the brake release is completed.

The installation process comprises the following steps: the nut 61 is loosened, the first brake disc 50 is removed, the annular brake disc 1 is placed on the left side of the second brake disc 30, the removed first brake disc 50 is installed, the nut 61 is screwed on, the whole brake system is installed on the axle 7, and finally the brake disc is fixed.

Preferably, the hydraulic cylinder 90 is cylindrical, and three hydraulic chambers 91 are disposed thereon, and are arranged in an equilateral triangle with the center of the circle as the center, and a shaft hole 95 is disposed in the middle of the hydraulic cylinder 90. Three linkage rods 60 pass through three linkage holes 94 on the hydraulic cylinder 90. The hydraulic cylinder 90 is provided with a pressure oil hole 96, the pressure oil hole 96 is communicated with the oil injection passage 92, and the oil injection passage 92 is respectively communicated with each hydraulic cavity 91. The triangular positions are arranged, so that extrusion force application is more uniform, and the braking effect is better.

As shown in fig. 7 and 8, in another embodiment, the pressing device includes a hydraulic cylinder 90, the hydraulic cylinder 90 is fixed on the wheel axle 7 of the wheel and is unable to rotate and move axially, the hydraulic cylinder is provided with a first hydraulic cavity 91, a second hydraulic cavity 91', a first oil injection passage 92, a second oil injection passage 92', the first oil injection passage 92, the second oil injection passage 92 'are respectively used for injecting pressure oil into the first hydraulic cavity 91, the second hydraulic cavity 91', the first hydraulic cavity 91, the second hydraulic cavity 91 'are both open on one side and opposite in opening direction, and respectively face the second brake disc 30 and the linkage disc 80, and the first hydraulic cavity 91, the second hydraulic cavity 91' are arranged on the hydraulic cylinder 90 in a staggered manner; the first hydraulic chamber 91 and the second hydraulic chamber 91 'are respectively provided with a piston 931, 932, and the directions are opposite, the pistons 931, 932 can move along the axial direction of the first hydraulic chamber 91 and the second hydraulic chamber 91' under the action of pressure oil, and the front ends of the pistons extend out of the opening ends of the corresponding hydraulic chambers to respectively push the second brake disc 30 and the linkage disc 80. As can be appreciated, due to the staggered arrangement of the first hydraulic chamber 91 and the second hydraulic chamber 91', the thickness of the hydraulic cylinder 90 is greatly reduced, the structure is more compact, and the occupied space is reduced.

Preferably, the hydraulic cylinder 90 is cylindrical, and three first hydraulic chambers 91 and three second hydraulic chambers 91' are provided thereon; the first hydraulic chambers 91 are arranged in an equilateral triangle with the center of the circle as the center; the second hydraulic chambers 91' are arranged in an equilateral triangle with the center of the circle as the center. The first hydraulic chamber 91 and the second hydraulic chamber 91' are arranged in a staggered manner. The hydraulic cylinder block 90 has a shaft hole 95 in the middle. Three linkage rods 60 pass through three linkage holes 94 on the hydraulic cylinder 90. The hydraulic cylinder 90 is provided with a first pressure oil hole 96 and a second pressure oil hole 96 'which are respectively communicated with the first oil injection passage 92 and the second oil injection passage 92', and the first oil injection passage 92 and the second oil injection passage 92 'are correspondingly and respectively communicated with the first hydraulic cavity 91 and the second hydraulic cavity 91'. The triangular positions are arranged, so that extrusion force application is more uniform, and the braking effect is better.

Fig. 9 shows a schematic view of a hydraulic cylinder having a single-sided hydraulic chamber of a hydraulic squeeze single-sided brake structure according to an embodiment of the present invention, as a typical single-sided brake structure embodiment. As shown in the figure, the extrusion device comprises a hydraulic cylinder body 90, the hydraulic cylinder body 90 is fixed on a wheel shaft of a wheel, a hydraulic cavity 91 with an opening on one side and an oil injection channel 92 are arranged on the hydraulic cylinder body, the oil injection channel 92 is used for injecting pressure oil into the hydraulic cavity 91, a piston is arranged in the hydraulic cavity, the opening end of the hydraulic cavity faces the outer side face of the brake disc, and the piston can axially move along the hydraulic cavity under the action of the pressure oil to enable the front end of the piston to extend out of the opening end to further push the brake disc to brake.

Preferably, the hydraulic cylinder 90 is cylindrical, three hydraulic chambers 91 are formed in the hydraulic cylinder 90, the three hydraulic chambers are arranged in an equilateral triangle with the center of a circle as a center, a pressure oil hole 96 is formed in the hydraulic cylinder 90, the pressure oil hole 96 is communicated with the oil injection passage 92, and the oil injection passage 92 is respectively communicated with the hydraulic chambers 91. The triangular positions are arranged, so that extrusion force application is more uniform, and the braking effect is better.

The foregoing is merely a preferred embodiment of this invention, which is intended to be illustrative, and not limiting. The structure, the connection mode and the like of all the components in the invention can be changed, and the equivalent transformation and the improvement on the basis of the technical scheme of the invention are not excluded from the protection scope of the invention.

Claims

1. A unilateral brake structure is characterized by comprising a brake disc, a return spring and an extrusion device;

the brake disc is fixed on a wheel hub of the wheel;

the extrusion device is fixed on a wheel shaft of the wheel;

the return spring is arranged between the brake disc and the brake disc;

2. The one-sided brake structure of claim 1, wherein the brake pad is annular and circumferentially disposed on an inner side surface of the brake disc, and an inner annular surface of the brake pad is entirely in contact with the brake disc in a braking state.

3. The one-sided brake structure of claim 1,

the extrusion device comprises an extrusion disc, the extrusion disc is rotatably connected to the wheel shaft and is fixed relative to the axial position of the wheel shaft; the inner side surface of the extrusion disc is opposite to the outer side surface of the brake disc;

4. A single-sided brake structure as defined in claim 3, wherein said pressing means further includes a return spring connected between said wheel shaft and said pressing disc for accumulating energy in a braking state and releasing energy to drive said pressing disc to rotate in a reverse direction in a released state.

5. A single-sided brake structure as claimed in claim 3 or 4, wherein the pressing disc is provided with a driving end, the driving end is provided with a pull wire hole, and the pull wire hole is used for connecting a brake cable.

6. A one-sided brake structure as claimed in claim 1, wherein the pressing device includes a hydraulic cylinder fixed to the wheel shaft of the wheel, the hydraulic cylinder is provided with a hydraulic chamber with an opening on one side and an oil injection passage for injecting pressure oil into the hydraulic chamber, a piston is disposed in the hydraulic chamber, the opening end of the hydraulic chamber faces the outer side surface of the brake disc, and the piston can move axially along the hydraulic chamber under the action of the pressure oil to extend the front end of the piston out of the opening end to push the brake disc.

7. A single-sided brake structure as defined in claim 6, wherein the hydraulic cylinder body is provided with a plurality of hydraulic chambers, and a piston is provided in each hydraulic chamber.

8. A bilateral brake structure is characterized by comprising a brake disc, a first brake disc, a second brake disc, a return spring, a linkage rod, a linkage disc and an extrusion device;

the brake disc is fixed on a wheel hub of the wheel;

9. The double-sided brake structure of claim 8, wherein the brake pads are annular and circumferentially disposed on opposite sides of the first rotor and the second rotor, and the inner annular surfaces of the brake pads are all in contact with the brake rotor in a braking state.

10. The double-sided brake structure of claim 8,

the extrusion device comprises an extrusion disc, the extrusion disc is rotatably connected to the wheel shaft and is fixed relative to the axial position of the wheel shaft; the inner side surface of the extrusion disc is opposite to the outer side surface of the second brake disc, and the outer side surface of the extrusion disc is opposite to the inner side surface of the linkage disc;

11. The double-sided brake structure of claim 10, wherein the pressing disc is provided with a driving end, and the driving end is provided with a pull wire hole for connecting a brake cable.

12. The double-sided brake structure of claim 8, wherein the pressing device comprises a hydraulic cylinder fixed to a wheel axle of the wheel, the hydraulic cylinder is provided with a hydraulic cavity and an oil injection passage, the oil injection passage is used for injecting pressure oil into the hydraulic cavity, the hydraulic cavity penetrates through the hydraulic cylinder, at least one set of pistons is arranged in the hydraulic cavity, each set of pistons comprises two pistons in opposite directions, and the two pistons can axially move along the hydraulic cavity in opposite directions under the action of the pressure oil, so that the front ends of the two pistons respectively extend out of the two open ends of the hydraulic cavity to respectively push the second brake disc and the linkage disc.

13. A double-sided brake structure as claimed in claim 12, wherein the hydraulic cylinder body is provided with a plurality of hydraulic chambers, at least one set of pistons is provided in each hydraulic chamber, and each set includes two pistons in opposite directions.

14. The double-sided brake structure of claim 8, wherein the pressing means includes a hydraulic cylinder fixed to a wheel axle of the wheel, the hydraulic cylinder having a first hydraulic chamber, a second hydraulic chamber and an oil injection passage for injecting pressure oil into the first hydraulic chamber and the second hydraulic chamber, respectively, the first hydraulic chamber and the second hydraulic chamber being open at one side and facing the second brake disc and the linkage disc, respectively, and the first hydraulic chamber and the second hydraulic chamber being disposed on the hydraulic cylinder in a staggered manner; and the first hydraulic cavity and the second hydraulic cavity are respectively internally provided with a piston, and the pistons can axially move along the hydraulic cavities under the action of pressure oil, so that the front ends of the pistons extend out of the opening ends of the corresponding hydraulic cavities.

15. A double-sided brake structure as claimed in claim 14, wherein the hydraulic cylinder block is provided with a plurality of first and second hydraulic chambers, the number of the first and second hydraulic chambers is the same, and a piston is provided in each hydraulic chamber.

16. A double sided brake arrangement as claimed in any one of claims 12 to 15, wherein the linkage rod passes through the hydraulic cylinder.