Brake structure, hub motor and vehicle

Abstract

The utility model relates to the technical field of braking, and provides a brake structure, a hub motor and a vehicle, the brake structure comprises a brake disc and a brake caliper, the brake disc comprises an annular body, and the annular body comprises an outer side face and an inner side face which are arranged at intervals in the radial direction of the annular body; the brake caliper comprises a first friction plate, a second friction plate and a driving piece, the first friction plate and the second friction plate are arranged at intervals in the radial direction of the annular body, and the first friction plate and the second friction plate are arranged corresponding to the outer side face and the inner side face respectively; a driving piece is arranged on the side, back to the second friction plate, of the first friction plate and / or the side, back to the first friction plate, of the second friction plate, and the driving piece is used for driving the first friction plate and the second friction plate to get close to each other in the radial direction of the annular body so as to clamp the annular body. According to the brake structure, the first friction plate, the second friction plate and the driving piece are arranged in the radial direction of the annular body, so that the size of the brake caliper in the axial direction of the annular body is relatively small, and the occupied space of the brake caliper in the axial direction of the annular body is reduced.

Description

Technical Field

[0001] The present application relates to the field of braking technology, and in particular to a brake structure, a wheel hub motor and a vehicle. Background Art

[0002] The traditional disc brake structure includes a brake disc and a brake caliper. The brake disc is fixedly connected to the wheel hub and rotates with the wheel hub. The brake caliper is directly or indirectly fixed to the vehicle body. The brake caliper includes a first friction plate, a second friction plate and a driving member. Part of the brake disc is located between the first friction plate and the second friction plate. When the driving member drives the first friction plate and the second friction plate to approach each other along the axial direction of the wheel hub, the first friction plate and the second friction plate generate friction with the brake disc to achieve braking and achieve the purpose of braking.

[0003] Since the first friction plate, the second friction plate and the driving member are arranged in the axial direction of the wheel hub, the size of the brake caliper in the axial direction of the wheel hub is relatively large, resulting in the brake caliper occupying more space in the axial direction of the wheel hub, which is not conducive to the arrangement of other components in the axial direction of the wheel hub. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a brake structure, a wheel hub motor and a vehicle to solve the problem that the existing brake caliper occupies more space in the axial direction of the wheel hub.

[0005] An embodiment of the first aspect of the present application proposes a brake structure, including a brake disc and a brake caliper, wherein the brake disc includes an annular body, and the annular body includes an outer side surface and an inner side surface arranged at intervals along the radial direction of the annular body; the brake caliper includes a first friction plate, a second friction plate and a driving member, the first friction plate and the second friction plate are arranged at intervals along the radial direction of the annular body, the first friction plate is located on the outer side of the annular body and arranged corresponding to the outer side surface, and the second friction plate is located on the inner side of the annular body and arranged corresponding to the inner side surface; the driving member is provided on the side of the first friction plate facing away from the second friction plate and / or on the side of the second friction plate facing away from the first friction plate, and the driving member is used to drive the first friction plate and the second friction plate to approach each other along the radial direction of the annular body to clamp the annular body.

[0006] The brake structure provided by the embodiment of the present application has the following beneficial effects: the brake disc includes an annular body, the annular body includes an outer side surface and an inner side surface arranged at intervals along the radial direction of the annular body, and the first friction plate of the brake caliper is arranged corresponding to the outer side surface of the annular body, and the second friction plate of the brake caliper is arranged corresponding to the inner side surface of the annular body, so when the driving member drives the first friction plate and the second friction plate to approach each other, the first friction plate and the second friction plate respectively generate friction with the outer side surface and the inner side surface of the annular body to achieve braking and achieve the purpose of braking. Since the first friction plate and the second friction plate are arranged at intervals along the radial direction of the annular body, and the driving member is provided on the side of the first friction plate facing away from the second friction plate and / or the side of the second friction plate facing away from the first friction plate, that is, the first friction plate, the second friction plate and the driving member are arranged in the radial direction of the annular body, the size of the brake caliper in the axial direction of the annular body is relatively small, so as to reduce the space occupied by the brake caliper in the axial direction of the annular body, which is conducive to the arrangement of other components in the axial direction of the annular body.

[0007] In some embodiments, a side surface of the first friction plate facing away from the outer side surface is a first plane, and a side surface of the first friction plate facing the outer side surface is a first arc-shaped surface adapted to the outer side surface;

[0008] Alternatively, the first friction plate is a first arc-shaped plate, and a side surface of the first friction plate facing the outer side surface is a first arc-shaped surface adapted to the outer side surface.

[0009] In some embodiments, the side surface of the second friction plate facing away from the inner side surface is a second plane, and the side surface of the second friction plate facing the inner side surface is a second arc-shaped surface adapted to the inner side surface;

[0010] Alternatively, the second friction plate is a second arc-shaped plate, and a side surface of the second friction plate facing the inner side surface is a second arc-shaped surface adapted to the inner side surface.

[0011] In some embodiments, the driving member is located radially inside the annular body.

[0012] In some embodiments, the brake caliper has a mounting cavity, and the driving member is a hydraulic piston installed in the mounting cavity.

[0013] In some embodiments, a heat dissipation cavity is provided on the annular body.

[0014] In some embodiments, the annular body includes an outer ring, an inner ring and a plurality of connecting ribs, wherein the plurality of connecting ribs are located between the outer ring and the inner ring and connect the outer ring and the inner ring; the heat dissipation cavity is surrounded by two adjacent connecting ribs, the outer ring and the inner ring.

[0015] In some embodiments, the brake disc further includes a fixing plate connected to the annular body, and the fixing plate is located radially inside or outside the annular body.

[0016] In some embodiments, the annular body is in the shape of a circular ring or a conical ring.

[0017] The second aspect of the present application proposes a hub motor, which includes a motor housing and a connecting shaft, and a brake structure as described in the first aspect, wherein the brake disc is fixed to one of the motor housing and the connecting shaft, and the brake caliper is fixed to the other of the motor housing and the connecting shaft.

[0018] The beneficial effects of the hub motor provided by the embodiment of the present application are as follows: since the first friction plate and the second friction plate are arranged at intervals along the radial direction of the annular body, and the driving member is provided on the side of the first friction plate facing away from the second friction plate and / or the side of the second friction plate facing away from the first friction plate, that is, the first friction plate, the second friction plate and the driving member are arranged in the radial direction of the annular body, the size of the brake caliper in the axial direction of the hub motor is relatively small, so as to reduce the space occupied by the brake caliper in the axial direction of the hub motor, which is beneficial to the arrangement of other components in the axial direction of the hub motor.

[0019] In some embodiments, the hub motor is an outer rotor motor, the connecting shaft is a fixed shaft, the motor housing is rotatably mounted on the connecting shaft, the brake disc is fixed on the motor housing, and the brake caliper is fixed on the connecting shaft.

[0020] A third aspect of the present application provides a vehicle, which includes a wheel hub motor as described in the second aspect.

[0021] The vehicle adopts all the embodiments of the above-mentioned hub motor, and thus has at least all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1is a schematic diagram of a brake structure provided by some embodiments of the present application;

[0025] Figure 2 yes Figure 1 AA sectional view of the brake structure shown;

[0026] Figure 3 yes Figure 2 The structural schematic diagram of the first friction plate and the second friction plate shown;

[0027] Figure 4 is a schematic diagram of the structure of a brake disc provided in some embodiments of the present application;

[0028] Figure 5 It is a schematic diagram of the structure of the hub motor provided in some embodiments of the present application.

[0029] The meanings of the marks in the figure are:

[0030] 100. Hub motor;

[0031] 10. Braking structure;

[0032] 11. brake disc; 111. annular body; 1111. outer ring; 1112. inner ring; 1113. connecting rib; 112. fixing plate; 1121. fixing screw; 113. outer side surface; 114. inner side surface; 115. heat dissipation cavity;

[0033] 12. Brake caliper; 121. Fixing frame; 122. Movable caliper body; 123. First friction plate; 1231. First arcuate surface; 1232. Third arcuate surface; 124. Second friction plate; 1241. Second arcuate surface; 1242. Fourth arcuate surface; 125. Driving member; 126. Mounting cavity; 127. Connecting port;

[0034] 20. Motor housing;

[0035] 30. Connecting shaft; 31. Fixing feet. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] The first aspect of the present application provides a brake structure, which can be applied to a wheel hub motor or other braking situations. Figure 1 and Figure 2 The brake structure 10 includes a brake disc 11 and a brake caliper 12. The brake disc 11 includes an annular body 111. The annular body 111 includes an outer side surface 113 and an inner side surface 114 arranged at intervals along the radial direction of the annular body 111. The brake caliper 12 includes a first friction plate 123, a second friction plate 124 and a driving member 125. The first friction plate 123 and the second friction plate 124 are arranged at intervals along the radial direction of the annular body 111. The first friction plate 123 is located on the outer side of the annular body 111 and is arranged corresponding to the outer side surface 113. The second friction plate 124 is located on the inner side of the annular body 111 and is arranged corresponding to the inner side surface 114. The driving member 125 is provided on one side of the first friction plate 123 facing away from the second friction plate 124 and / or on one side of the second friction plate 124 facing away from the first friction plate 123. The driving member 125 is used to drive the first friction plate 123 and the second friction plate 124 to approach each other along the radial direction of the annular body 111 to clamp the annular body 111.

[0045] The brake disc 11 needs to have good wear resistance and high temperature resistance to increase its service life; for example, the brake disc 11 can be made of materials such as gray cast iron, carbon fiber ceramics, etc.

[0046] The two large surfaces of the annular body 111 refer to two surfaces of the annular body 111 with significantly larger areas, and the two large surfaces are respectively an outer surface 113 and an inner surface 114 , and the outer surface 113 and the inner surface 114 are arranged opposite to each other in the radial direction of the annular body 111 .

[0047] Wherein, the outer side surface 113 and the inner side surface 114 are both annular surfaces. It can be understood that the generatrix of the outer side surface 113 and the generatrix of the inner side surface 114 can be parallel or intersecting. When the generatrix of the outer side surface 113 and the generatrix of the inner side surface 114 are parallel, the outer side surface 113 and the inner side surface 114 can both be annular surfaces; the outer side surface 113 and the inner side surface 114 can both be conical torus surfaces, and the tapers of the outer side surface 113 and the inner side surface 114 are the same. When the generatrix of the outer side surface 113 and the generatrix of the inner side surface 114 intersect, one of the outer side surface 113 and the inner side surface 114 can be an annular surface, and the other of the outer side surface 113 and the inner side surface 114 can be a conical torus surface; or, the outer side surface 113 and the inner side surface 114 can both be conical torus surfaces, and the tapers of the outer side surface 113 and the inner side surface 114 are different.

[0048] The first friction plate 123 and the second friction plate 124 are arranged at intervals along the radial direction of the annular body 111, that is, a placement space for placing the annular body 111 is formed between the first friction plate 123 and the second friction plate 124. The first friction plate 123 is arranged corresponding to the outer side surface 113, and the second friction plate 124 is arranged corresponding to the inner side surface 114. It can be understood that the first friction plate 123 is located on the outer side of the annular body 111, and the second friction plate 124 is located on the inner side of the annular body 111.

[0049] It should be noted that before the driving member 125 is driven, the first friction plate 123 does not contact the outer side surface 113 of the annular body 111, and the second friction plate 124 does not contact the inner side surface 114 of the annular body 111, and the brake disc 11 can rotate normally; after the driving member 125 is driven, the first friction plate 123 contacts the outer side surface 113 of the annular body 111, and the second friction plate 124 contacts the inner side surface 114 of the annular body 111, so as to clamp the annular body 111, thereby achieving braking.

[0050] It can be understood that the width of the first friction plate 123 and the second friction plate 124 in the axial direction of the annular body 111 can be greater than, equal to, or less than the width of the annular body 111 in the axial direction thereof.

[0051] A driving member 125 is provided on the side of the first friction plate 123 facing away from the second friction plate 124 and / or a side of the second friction plate 124 facing away from the first friction plate 123. It can be understood that the driving member 125 is provided on the side of the first friction plate 123 facing away from the second friction plate 124, that is, the driving member 125 is located on the radial outside of the annular body 111; or, the driving member 125 is provided on the side of the second friction plate 124 facing away from the first friction plate 123, that is, the driving member 125 is located on the radial inside of the annular body 111; or, the driving member 125 is provided on the side of the first friction plate 123 facing away from the second friction plate 124, and the driving member 125 is provided on the side of the second friction plate 124 facing away from the first friction plate 123, that is, the two driving members 125 are respectively located on the radial outside and radial inside of the annular body 111.

[0052] When the driving member 125 is provided only on one radial side of the annular body 111, the driving member 125 simultaneously drives the first friction plate 123 and the second friction plate 124 to approach each other to clamp the annular body 111 for braking, that is, the brake caliper 12 is a floating caliper, which has a low manufacturing cost and is easy to install; when the driving members 125 are provided on both radial sides of the annular body 111, the two driving members 125 respectively drive the first friction plate 123 and the second friction plate 124 to approach each other to clamp the annular body 111 for braking, that is, the brake caliper 12 is a fixed caliper, which can provide a larger braking force and achieve a better braking effect.

[0053] The brake structure 10 provided in the embodiment of the present application includes a brake disc 11 and a brake caliper 12. The brake disc 11 includes an annular body 111. The annular body 111 includes an outer side surface 113 and an inner side surface 114 arranged at intervals along the radial direction of the annular body 111. The first friction plate 123 of the brake caliper 12 is arranged corresponding to the outer side surface 113 of the annular body 111, and the second friction plate 124 of the brake caliper 12 is arranged corresponding to the inner side surface 114 of the annular body 111. Therefore, when the driving member 125 drives the first friction plate 123 and the second friction plate 124 to approach each other, the first friction plate 123 and the second friction plate 124 respectively generate friction with the outer side surface 113 and the inner side surface 114 of the annular body 111 to realize braking and achieve the purpose of braking. Since the first friction plate 123 and the second friction plate 124 are arranged at intervals along the radial direction of the annular body 111, and the driving member 125 is provided on the side of the first friction plate 123 facing away from the second friction plate 124 and / or the side of the second friction plate 124 facing away from the first friction plate 123, that is, the first friction plate 123, the second friction plate 124 and the driving member 125 are arranged in the radial direction of the annular body 111, the axial size of the brake caliper 12 in the annular body 111 is relatively small, so as to reduce the space occupied by the brake caliper 12 in the axial direction of the annular body 111, which is beneficial to the arrangement of other components in the axial direction of the annular body 111, and further beneficial to the miniaturized design of the vehicle body in the axial direction of the wheel hub.

[0054] Please also refer to Figure 2 and Figure 3 In some embodiments, the first friction plate 123 is a first arc-shaped plate, and a side surface of the first friction plate 123 facing the outer side surface 113 is a first arc-shaped surface 1231 adapted to the outer side surface 113 .

[0055] The first friction plate 123 is a first arcuate plate, that is, the side surface of the first friction plate 123 facing away from the outer side surface 113 is a third arcuate surface 1232. It can be understood that the bending direction of the third arcuate surface 1232 is the same and consistent with that of the first arcuate surface 1231, that is, in the circumferential direction of the annular body 111, the thickness of the first friction plate 123 is the same; or, in the circumferential direction of the annular body 111, the thickness in the middle of the first friction plate 123 is greater or less than the thickness at both ends thereof.

[0056] Since the first arcuate surface 1231 is adapted to the outer side surface 113 of the annular body 111 , it can be understood that the first arcuate surface 1231 and the outer side surface 113 have the same curvature, so the first arcuate surface 1231 and the outer side surface 113 can fit better to increase the contact area and improve the braking force.

[0057] In other embodiments, the side surface of the first friction plate 123 facing the outer side surface 113 is a first arcuate surface 1231 adapted to the outer side surface 113, and the side surface of the first friction plate 123 facing away from the outer side surface 113 is a first plane. Of course, the side surface of the first friction plate 123 facing away from the outer side surface 113 may also be a fifth arcuate surface, and the curvature direction of the fifth arcuate surface is opposite to that of the first arcuate surface 1231.

[0058] Please also refer to Figure 2 and Figure 3 In some embodiments, the second friction plate 124 is a second arc-shaped plate, and the side surface of the second friction plate 124 facing the inner side surface 114 is a second arc-shaped surface 1241 adapted to the inner side surface 114. The side surface of the second friction plate 124 facing the inner side surface 114 refers to the side surface of the second friction plate 124 that is relatively far away from the axis of the annular body 111.

[0059] The second friction plate 124 is a second arc-shaped plate, that is, the side surface of the second friction plate 124 facing away from the inner side surface 114 is a fourth arc-shaped surface 1242. The side surface of the second friction plate 124 facing away from the inner side surface 114 refers to the side surface of the second friction plate 124 relatively close to the axis of the annular body 111. It can be understood that the bending direction of the fourth arc-shaped surface 1242 is the same and consistent with that of the second arc-shaped surface 1241, that is, in the circumferential direction of the annular body 111, the thickness of the second friction plate 124 is the same; or, in the circumferential direction of the annular body 111, the thickness of the second friction plate 124 in the middle is greater than or less than the thickness of the two ends thereof.

[0060] Since the second arc surface 1241 is adapted to the inner side surface 114 of the annular body 111 , it can be understood that the second arc surface 1241 and the inner side surface 114 have the same curvature, so the second arc surface 1241 and the inner side surface 114 can fit better to increase the contact area and improve the braking force.

[0061] In other embodiments, the side surface of the second friction plate 124 facing the inner side surface 114 is a second arcuate surface 1241 adapted to the inner side surface 114, and the side surface of the second friction plate 124 facing away from the inner side surface 114 is a second plane. Of course, the side surface of the second friction plate 124 facing away from the inner side surface 114 may also be a sixth arcuate surface, and the sixth arcuate surface is opposite to the bending direction of the second arcuate surface 1241.

[0062] In some embodiments, the side surface of the first friction plate 123 facing the outer side surface 113 is a first arcuate surface 1231 adapted to the outer side surface 113 , and the side surface of the second friction plate 124 facing the inner side surface 114 is a second arcuate surface 1241 adapted to the inner side surface 114 .

[0063] It can be understood that the side surface of the first friction plate 123 facing away from the outer side surface 113 can be a plane, and the side surface of the second friction plate 124 facing away from the inner side surface 114 can be a plane; or, the side surface of the first friction plate 123 facing away from the outer side surface 113 can be a plane, and the side surface of the second friction plate 124 facing away from the inner side surface 114 can be an arcuate surface; or, the side surface of the first friction plate 123 facing away from the outer side surface 113 can be an arcuate surface, and the side surface of the second friction plate 124 facing away from the inner side surface 114 can be a plane; or again, the side surface of the first friction plate 123 facing away from the outer side surface 113 can be an arcuate surface, and the side surface of the second friction plate 124 facing away from the inner side surface 114 can be an arcuate surface.

[0064] Since the first arcuate surface 1231 is matched with the outer side surface 113 of the annular body 111, and the second arcuate surface 1241 is matched with the inner side surface 114 of the annular body 111, it can be understood that the first arcuate surface 1231 has the same curvature as the outer side surface 113, and the second arcuate surface 1241 has the same curvature as the inner side surface 114. Therefore, the first arcuate surface 1231 can better fit with the outer side surface 113, and the second arcuate surface 1241 can better fit with the inner side surface 114, so as to increase the contact area and improve the braking force.

[0065] Please also refer to Figure 1 and Figure 2 In some embodiments, the driving member 125 is located radially inside the annular body 111 .

[0066] The second friction plate 124 is located between the annular body 111 and the driving member 125 .

[0067] The driving member 125 is located on the inner side of the annular body 111, that is, the driving member 125 is only provided on one side of the annular body 111, so the brake caliper 12 is a floating caliper. Specifically, the brake caliper 12 includes a fixed frame 121 and a movable caliper body 122, the movable caliper body 122 can move relative to the fixed frame 121 in the radial direction of the annular body 111, the first friction plate 123 is fixed on the movable caliper body 122, and the second friction plate 124 is movably installed on the movable caliper body 122; when the driving member 125 drives the second friction plate 124 to approach the inner side surface 114 of the annular body 111, the movable caliper body 122 and the second friction plate 124 move in opposite directions to drive the first friction plate 123 to approach the outer side surface 113 of the annular body 111, so that the first friction plate 123 and the second friction plate 124 clamp the annular body 111 to achieve braking.

[0068] Since the driving member 125 occupies a certain space, the driving member 125 is disposed inside the annular body 111 , so that the space inside the annular body 111 can be fully utilized to reduce the radial dimension of the brake structure 10 .

[0069] In other embodiments, the driving member 125 may be located outside the annular body 111, that is, the driving member 125 is provided on only one side of the annular body 111, and the first friction plate 123 is located between the annular body 111 and the driving member 125. At this time, the brake caliper 12 is a floating caliper, and the braking principle is the same as above.

[0070] In other embodiments, the driving member 125 can be provided on both the inner and outer sides of the annular body 111, and the brake caliper 12 is a fixed caliper. Specifically, the brake caliper 12 includes a fixed caliper body, and the first friction plate 123 and the second friction plate 124 are both movably mounted on the fixed caliper body, and the first friction plate 123 is between the annular body 111 and the driving member 125 on the outer side of the annular body 111, and the second friction plate 124 is between the annular body 111 and the driving member 125 on the inner side of the annular body 111; the driving member 125 on the outer side of the annular body 111 drives the first friction plate 123 to approach the outer side surface 113, and the driving member 125 on the inner side of the annular body 111 drives the second friction plate 124 to approach the inner side surface 114, so that the first friction plate 123 and the second friction plate 124 clamp the annular body 111 to achieve braking.

[0071] Please refer to Figure 2 In some embodiments, the brake caliper 12 has a mounting cavity 126 , and the driving member 125 is a hydraulic piston installed in the mounting cavity 126 .

[0072] A hydraulic piston is a piston driven by hydraulic pressure.

[0073] Optionally, the brake caliper 12 is a floating caliper, the brake caliper 12 comprises a fixing frame 121 and a movable caliper body 122, a mounting cavity 126 is provided on the movable caliper body 122, a driving member 125 is slidably installed in the mounting cavity 126, and a sealing ring is provided between the outer wall surface of the driving member 125 and the cavity wall of the mounting cavity 126; wherein, a connecting port 127 communicating with the mounting cavity 126 is further provided on the movable caliper body 122, and the connecting port 127 is used to connect a hydraulic pipeline. Under the action of the hydraulic pressure, the driving member 125 drives the first friction plate 123 and the second friction plate 124 to approach each other to clamp the annular body 111.

[0074] Optionally, the brake caliper 12 is a fixed caliper, the brake caliper 12 includes a fixed caliper body, the mounting cavity 126 is provided on the fixed caliper body, the driving member 125 is slidably installed in the mounting cavity 126, and a sealing ring is provided between the outer wall surface of the driving member 125 and the cavity wall of the mounting cavity 126; wherein, the fixed caliper body is also provided with a connecting port 127 connected to the mounting cavity 126, and the connecting port 127 is used to connect a hydraulic pipeline. Under the action of the hydraulic pressure, the driving member 125 drives the first friction plate 123 and the second friction plate 124 to move closer to each other to clamp the annular body 111.

[0075] It can be understood that the installation cavity 126 can be set on the inner side of the annular body 111, that is, the driving member 125 is on the inner side of the annular body 111; or, the installation cavity 126 can also be set on the outer side of the annular body 111, that is, the driving member 125 is on the outer side of the annular body 111; or, the installation cavity 126 is provided on both the inner and outer sides of the annular body 111, that is, the driving member 125 is provided on both the inner and outer sides of the annular body 111.

[0076] Designing the driving member 125 as a hydraulic piston makes the overall structure of the brake caliper 12 simpler, which is beneficial to reducing costs.

[0077] In other embodiments, the driving member 125 may be an electric piston, wherein the electric piston refers to a piston driven by a motor. Specifically, the electric piston is installed in the installation cavity 126 along the radial direction of the annular body 111 and is slidable, and the electric piston cannot rotate around its own axis. The electric piston is threadedly connected to the lead screw, and the motor drives the lead screw to rotate through a reduction mechanism to enable the electric piston to slide in the radial direction of the annular body 111, thereby enabling the electric piston to drive the first friction plate 123 and the second friction plate 124 to clamp the annular body 111, thereby achieving braking.

[0078] Please refer to Figure 1 A heat dissipation cavity 115 is provided on the annular body 111 .

[0079] In order to improve the strength and service life of the brake disc 11 , the thickness of the annular body 111 is generally designed to be larger. By providing a heat dissipation cavity 115 on the annular body 111 , it is not only beneficial to the heat dissipation of the brake structure 10 during braking, but also can reduce the weight of the brake structure 10 .

[0080] Please also refer to Figure 1 and Figure 2 In some embodiments, the annular body 111 includes an outer ring 1111, an inner ring 1112 and a plurality of connecting ribs 1113, wherein the plurality of connecting ribs 1113 are located between the outer ring 1111 and the inner ring 1112 and connect the outer ring 1111 and the inner ring 1112; the heat dissipation cavity 115 is surrounded by two adjacent connecting ribs 1113, the outer ring 1111 and the inner ring 1112.

[0081] The side surface of the outer ring 1111 facing away from the inner ring 1112 is called the outer side surface 113 , and the side surface of the inner ring 1112 facing away from the outer ring 1111 is called the inner side surface 114 .

[0082] Among them, multiple connecting ribs 1113 are located between the outer ring 1111 and the inner ring 1112 , which means that multiple connecting ribs 1113 are located between the side surface of the outer ring 1111 facing the inner ring 1112 and the side surface of the inner ring 1112 facing the outer ring 1111 .

[0083] It can be understood that, in the axial direction of the annular body 111 , the width of the outer ring 1111 can be smaller than, equal to, or larger than the width of the inner ring 1112 .

[0084] Multiple connecting ribs 1113 are located between the outer ring 1111 and the inner ring 1112 and connect the outer ring 1111 and the inner ring 1112. It can be understood that the connecting ribs 1113 can be integrally formed with the outer ring 1111 and the inner ring 1112, for example, integrally cast; or, the connecting ribs 1113 are fixed (can be but not limited to welding) between the outer ring 1111 and the inner ring 1112.

[0085] The heat dissipation cavity 115 is surrounded by two adjacent connecting ribs 1113, the outer ring 1111 and the inner ring 1112, that is, the heat dissipation cavity 115 is arranged along the axial direction of the ring body 111 to facilitate the inflow and outflow of natural wind, which is beneficial to improving the heat dissipation efficiency. In addition, the connecting ribs 1113 can strengthen the structural strength of the ring body 111, which is beneficial to improving the service life of the brake disc 11.

[0086] Optionally, the heat dissipation cavity 115 is a strip-shaped cavity extending circumferentially along the annular body 111 to increase the heat dissipation area and further improve the heat dissipation efficiency.

[0087] In other embodiments, through holes may be provided along the radial direction of the annular body 111 , and the cavities of the through holes constitute the heat dissipation cavity 115 ; and / or blind holes may be provided along the radial direction of the annular body 111 , and the cavities of the blind holes constitute the heat dissipation cavity 115 .

[0088] Please refer to Figure 1 and Figure 2 In some embodiments, the brake disc 11 further includes a fixing plate 112 connected to the annular body 111 , and the fixing plate 112 is located radially inside or outside the annular body 111 .

[0089] It can be understood that the fixing plate 112 may be an annular plate, and a plurality of fixing plates 112 may be arranged at intervals along the circumference of the annular body 111 .

[0090] It can be understood that the fixing plate 112 can be located radially inside the annular body 111 , or the fixing plate 112 can be located radially outside the annular body 111 .

[0091] Optionally, the fixing plate 112 is connected to one axial end of the annular body 111. It is understood that the fixing plate 112 can be integrally formed with the annular body 111, and the fixing plate 112 can also be fixed (can be but not limited to welding) on ​​the annular body 111.

[0092] Optionally, a fixing hole is provided on the fixing plate 112 , and a fixing screw 1121 is passed through the fixing hole.

[0093] It should be noted that the brake disc 11 is fixed to the corresponding product via a fixing plate 112 .

[0094] In other embodiments, the fixing plate 112 may not be provided, but the width of the inner ring 1112 in the axial direction of the annular body 111 may be designed to be larger, and a plurality of fixing holes are provided on the inner ring 1112 along its circumference, and fixing screws 1121 are inserted into the fixing holes.

[0095] Please also refer to Figure 1 and Figure 2 In some embodiments, the ring body 111 is in the shape of a ring.

[0096] It can be understood that both the outer side surface 113 and the inner side surface 114 are annular surfaces, that is, the generatrix of the outer side surface 113 and the generatrix of the inner side surface 114 are parallel to the axis of the annular body 111 .

[0097] Designing the annular body 111 as a circular ring facilitates the processing of the annular body 111 .

[0098] Please refer to Figure 4 In some embodiments, the ring body 111 is shaped as a conical ring.

[0099] It can be understood that both the outer side surface 113 and the inner side surface 114 are conical annular surfaces, that is, the generatrix of the outer side surface 113 and the generatrix of the inner side surface 114 are parallel and both intersect with the axis of the annular body 111 .

[0100] The second aspect of the present application provides a hub motor 100. Figure 2 and Figure 5 The hub motor 100 includes a motor housing 20 and a connecting shaft 30, and a brake structure 10 as described in the first aspect, wherein a brake disc 11 is fixed to one of the motor housing 20 and the connecting shaft 30, and a brake caliper 12 is fixed to the other of the motor housing 20 and the connecting shaft 30.

[0101] Since the first friction plate 123 and the second friction plate 124 of the brake caliper 12 are arranged at intervals along the radial direction of the annular body 111, and the driving member 125 is provided on the side of the first friction plate 123 facing away from the second friction plate 124 and / or the side of the second friction plate 124 facing away from the first friction plate 123, that is, the first friction plate 123, the second friction plate 124 and the driving member 125 are arranged in the radial direction of the annular body 111, the size of the brake caliper 12 in the axial direction of the wheel hub motor 100 is relatively small, so as to reduce the space occupied by the brake caliper 12 in the axial direction of the wheel hub motor 100, which is beneficial to the arrangement of other components in the axial direction of the wheel hub motor 100.

[0102] Please refer to Figure 5In some embodiments, the hub motor 100 is an outer rotor motor, the connecting shaft 30 is a fixed shaft, the motor housing 20 is rotatably mounted on the connecting shaft 30 , the brake disc 11 is fixed on the motor housing 20 , and the brake caliper 12 is fixed on the connecting shaft 30 .

[0103] Optionally, a stator assembly and a rotor assembly are provided in the motor housing 20, the rotor assembly is fixed to the inner wall of the motor housing 20, the stator assembly is fixed to the connecting shaft 30, the motor housing 20 is connected to the wheel rim, and the connecting shaft 30 is fixed to the vehicle body. Since the motor housing 20 is rotatably mounted on the connecting shaft 30, the rotor assembly can rotate relative to the stator assembly after the stator assembly is powered on.

[0104] The brake disc 11 is fixed on the motor housing 20, that is, the brake disc 11 can rotate with the motor housing 20; the brake caliper 12 is fixed on the connecting shaft 30, and part of the brake disc 11 is between the first friction plate 123 and the second friction plate 124 of the brake caliper 12. When the first friction plate 123 does not contact the outer side surface 113 of the annular body 111, and the second friction plate 124 does not contact the inner side surface 114 of the annular body 111, the brake disc 11 and the motor housing 20 can rotate normally; after the driving member 125 is driven, the first friction plate 123 contacts the outer side surface 113 of the annular body 111, and the second friction plate 124 contacts the inner side surface 114 of the annular body 111, so as to clamp the annular body 111, prevent the brake disc 11 from continuing to rotate, and then prevent the motor housing 20 from driving the wheel to continue to rotate, thereby achieving braking.

[0105] Optionally, a fixed support leg 31 is provided on the connecting shaft 30, and the brake caliper 12 is fixed on the fixed support leg 31. It can be understood that when the brake caliper 12 is a floating caliper, the brake caliper 12 includes a fixed frame 121 and a movable caliper body 122, and the fixed frame 121 is fixed on the fixed support leg 31; when the brake caliper 12 is a fixed caliper, the brake caliper 12 includes a fixed caliper body, and the fixed caliper body is fixed on the fixed support leg 31.

[0106] By fixing the brake disc 11 on the motor housing 20 and the brake caliper 12 on the connecting shaft 30, the brake structure 10 is integrated on the wheel hub motor 100, which is beneficial to the subsequent assembly of the wheel hub motor 100 and the vehicle body.

[0107] In other embodiments, when the brake disc 11 is fixed on the motor housing 20 , the brake caliper 12 can be fixed on the vehicle body.

[0108] In other embodiments, the hub motor 100 can be an external stator motor, and a stator assembly and a rotor assembly are provided in the motor housing 20. The stator assembly is fixed on the inner wall of the motor housing 20, and the rotor assembly is fixed on the connecting shaft 30. The connecting shaft 30 is a rotating shaft, and the connecting shaft 30 can rotate relative to the motor housing 20. The connecting shaft 30 is connected to the wheel rim, and the motor housing 20 is fixed on the vehicle body.

[0109] A third aspect of the present application provides a vehicle, wherein the vehicle comprises the wheel hub motor 100 as described in the second aspect.

[0110] The vehicle adopts all the embodiments of the above-mentioned hub motor 100, and thus has all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0111] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A brake structure, characterized in that: The invention comprises a brake disc and a brake caliper, wherein the brake disc comprises an annular body, wherein the annular body comprises an outer side surface and an inner side surface arranged at intervals along the radial direction of the annular body; the brake caliper comprises a first friction plate, a second friction plate and a driving member, wherein the first friction plate and the second friction plate are arranged at intervals along the radial direction of the annular body, the first friction plate is located on the outer side of the annular body and is arranged corresponding to the outer side surface, and the second friction plate is located on the inner side of the annular body and is arranged corresponding to the inner side surface; the driving member is provided on a side of the first friction plate facing away from the second friction plate and / or on a side of the second friction plate facing away from the first friction plate, and the driving member is used to drive the first friction plate and the second friction plate to approach each other along the radial direction of the annular body to clamp the annular body.

2. The brake structure according to claim 1, characterized in that: The side surface of the first friction plate facing away from the outer side surface is a first plane, and the side surface of the first friction plate facing the outer side surface is a first arc-shaped surface adapted to the outer side surface; Alternatively, the first friction plate is a first arc-shaped plate, and a side surface of the first friction plate facing the outer side surface is a first arc-shaped surface adapted to the outer side surface.

3. The brake structure according to claim 1, characterized in that: The side surface of the second friction plate facing away from the inner side surface is a second plane, and the side surface of the second friction plate facing the inner side surface is a second arc-shaped surface adapted to the inner side surface; Alternatively, the second friction plate is a second arc-shaped plate, and a side surface of the second friction plate facing the inner side surface is a second arc-shaped surface adapted to the inner side surface.

4. The brake structure according to claim 1, characterized in that: The driving member is located radially inside the annular body.

5. The brake structure according to claim 1, characterized in that: The brake caliper has a mounting cavity, and the driving member is a hydraulic piston mounted in the mounting cavity.

6. The brake structure according to any one of claims 1 to 5, characterized in that: A heat dissipation cavity is provided on the annular body.

7. The brake structure according to claim 6, characterized in that: The annular body includes an outer ring, an inner ring and a plurality of connecting ribs, wherein the plurality of connecting ribs are located between the outer ring and the inner ring and connect the outer ring and the inner ring; the heat dissipation cavity is surrounded by two adjacent connecting ribs, the outer ring and the inner ring.

8. The brake structure according to any one of claims 1 to 5, characterized in that: The brake disc further comprises a fixing plate connected to the annular body, wherein the fixing plate is located radially inside or outside the annular body.

9. The brake structure according to any one of claims 1 to 5, characterized in that: The annular body is in the shape of a circular ring or a conical ring.

10. A hub motor, characterized in that: It comprises a motor housing and a connecting shaft, and a brake structure as described in any one of claims 1 to 9, wherein the brake disc is fixed on one of the motor housing and the connecting shaft, and the brake caliper is fixed on the other of the motor housing and the connecting shaft.

11. The wheel hub motor according to claim 10, characterized in that: The hub motor is an outer rotor motor, the connecting shaft is a fixed shaft, the motor housing is rotatably mounted on the connecting shaft, the brake disc is fixed on the motor housing, and the brake caliper is fixed on the connecting shaft.

12. A vehicle, characterized in that: Comprising the hub motor as claimed in claim 10 or 11.

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