Hub motor connecting piece, hub motor pneumatic brake structure and vehicle

Abstract

The invention relates to the field of new energy automobile hub motor braking, in particular to a hub motor connecting piece, a hub motor pneumatic braking structure and a vehicle. Comprising a brake connecting piece, a hub motor, a hub, a brake piece and an air brake structure, and the output end of the hub motor is connected with the hub; one end of the brake connecting piece is connected with the hub, and the other end of the brake connecting piece extends out of the rim to be connected with the brake piece; the pneumatic brake structure is connected to an axle and is used for braking the brake component; and the hub motor is arranged in the rim. According to the invention, by adding the brake connecting piece, a hydraulic brake structure of the hub motor is converted into a pneumatic brake structure, so that the running and parking integrated brake function of the hub motor is realized, and the brake safety and economical efficiency of the hub motor are improved.

Description

Technical Field

[0001] The present invention relates to the field of wheel hub motor braking for new energy vehicles, and in particular to a wheel hub motor connector, a wheel hub motor air brake structure and a vehicle. Background Art

[0002] Traditional wheel hub motors can only use small hydraulic disc brakes due to installation space limitations. Due to the low braking force of hydraulic brakes and the risk of oil leakage, they are rarely used on medium and heavy trucks for safety reasons, which affects the promotion and use of wheel hub motors. Driving hydraulic brake calipers cannot be used for parking, so hydraulic brake vehicles need to be equipped with independent parking brakes, making the vehicle braking structure more complicated.

[0003] A hub motor brake structure named "dual-axis output inner rotor motor with reducer plus disc brake structure" is disclosed, including a front wheel hub, a rear wheel hub, a rim, a disc brake, a wheel disc, a dual-axis output inner rotor motor, and a reducer. The rear output shaft of the dual-axis output inner rotor motor is fixedly connected to the rear wheel hub through the reducer, and the outer side of the rear wheel hub is fixedly connected to the wheel disc of the tire; the wheel disc is connected to the rim; the front output shaft of the dual-axis output inner rotor motor is fixed to the front wheel hub; and the outer side of the front wheel hub is fixedly connected to the brake disc of the disc brake. This technical solution adopts a disc brake structure, which can ensure the braking effect of the vehicle while avoiding the risk of oil leakage of the hydraulic disc brake, simplifying the braking structure of the vehicle, so that the hub motor can be used on medium and heavy trucks.

[0004] However, the brake disc of this technical solution is directly connected to the motor output shaft without being decelerated by the reducer, and the wheel is connected to the motor output shaft through the reducer, so the actual speed of the brake disc is several times higher than the wheel speed. Therefore, when braking in an actual working environment, due to the high speed and high linear speed of the brake disc, it is easy to cause excessive friction material loss and thermal decay of the brake disc, and there is a risk of brake failure. Summary of the invention

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a hub motor connector, a hub motor air brake structure and a vehicle, through which the brake structure is moved from the narrow space of the rim to a larger space, and then the hydraulic brake structure is converted into an air brake structure that requires a larger space for installation, and the air brake structure can realize the integrated braking function of the hub motor; the present invention improves the braking safety and economy of the hub motor while ensuring that the brake disc and the wheel rotate at the same speed.

[0006] The technical solution of the present invention is: a hub motor connector, comprising:

[0007] A brake connector, the brake connector is a cavity structure with two ends opened, and is used to be arranged in the gap between the rim and the hub motor, the brake connector includes a transition portion, one end of the transition portion is connected to the first connection portion, and the other end of the transition portion is connected to the second connection portion;

[0008] Wherein, the first connecting portion is used to connect the wheel hub; the second connecting portion is used to connect the brake member;

[0009] One end of the transition portion connected to the second connection portion extends outwardly beyond the coverage range of the rim, so that the second connection portion can be installed in the external space of the rim.

[0010] According to a hub motor connector provided in the present application, a first connecting surface is provided at one end of the first connecting portion facing away from the transition portion, the first connecting surface is used to connect to the hub connecting surface of the hub, and the plane where the first connecting surface is located is set at an angle to the axis of the transition portion.

[0011] According to a hub motor connector provided in the present application, a second connecting surface is provided at one end of the second connecting portion facing away from the transition portion, the second connecting surface is used to connect to the brake connecting surface of the brake portion, and the plane where the second connecting surface is located is set at an angle to the axis of the transition portion.

[0012] According to a hub motor connector provided in the present application, a plurality of ventilation holes are provided on the transition portion.

[0013] Based on the same inventive concept, the present application also provides a hub motor air brake structure, including:

[0014] A brake connector, a wheel hub motor, a wheel hub, a brake member and an air brake structure, wherein the output end of the wheel hub motor is connected to the wheel hub; one end of the brake connector is connected to the wheel hub, and the other end extends out of the wheel rim and is connected to the brake member; the air brake structure is connected to the axle and is used to brake the brake member; the wheel hub motor is arranged in the wheel rim.

[0015] According to a hub motor air brake structure provided in the present application, the brake connector is arranged in the axial position in the wheel rim, which is located in the gap between the hub motor and the wheel rim.

[0016] According to a hub motor air brake structure provided in the present application, the brake connecting part includes a transition part, a first connecting part and a second connecting part. The transition part is located in the gap between the hub motor and the rim, with one end connected to the first connecting part and the other end connected to the second connecting part; the first connecting part is connected to the wheel hub; and the second connecting part is connected to the brake part.

[0017] According to a hub motor air brake structure provided in the present application, the transition portion is located in the gap between the hub motor and the rim, and a plurality of ventilation holes are provided on the peripheral surface of the transition portion.

[0018] According to a hub motor pneumatic brake structure provided by the present application, the brake component includes a brake disc and a brake disc flange, the brake disc is connected to the brake disc flange; the brake disc flange is connected to the flange surface of the brake connector extending out of the wheel rim.

[0019] Based on the same inventive concept, the present application also provides a vehicle, which includes any of the above-mentioned hub motor air brake structures.

[0020] The advantages of this application are:

[0021] 1. The present application releases the brake component from the narrow space of the wheel rim by adding the brake connector to the wheel hub motor, thereby facilitating the replacement of the hydraulic brake structure with a pneumatic brake structure, thereby enhancing the braking force and safety, and realizing the integrated function of driving brake and parking brake, and can be promoted and applied on medium and heavy-duty vehicles.

[0022] 2. The brake member of the present application is directly connected to the wheel via the brake connector, so that the brake member and the wheel rotate at the same speed, thus avoiding the problem of excessive friction material loss or thermal decay of the brake member due to excessive rotation speed.

[0023] 3. The brake connector described in the present application is made of lightweight and high-strength material, which can reduce the weight of the hub motor air brake structure while ensuring the connection strength between the brake component and the wheel, thereby saving the energy consumed by vehicle braking.

[0024] 4. The second connecting portion of the brake connector described in the present application is provided with a second connecting surface at the connecting end connected to the brake component, and a bolt connecting hole is opened on the second connecting surface to facilitate bolt connection between the second connecting surface and the brake component, thereby enhancing the connection strength between the two.

[0025] 5. The connection end of the first connection portion of the brake connector described in the present application that is connected to the wheel hub is provided with a first connection surface, and a bolt connection hole is opened on the first connection surface to facilitate bolt connection between the first connection surface and the wheel hub, thereby enhancing the connection strength between the two.

[0026] 6. The brake disc described in the present application has enough space outside to connect the air brake structure. Compared with the hydraulic brake structure, the air brake structure can not only realize the driving brake function, but also realize the parking brake function, eliminating the parking brake added by the hydraulic brake structure, and simplifying the brake structure of the wheel hub motor.

[0027] 7. A brake disc flange is connected between the brake disc and the brake connecting member in the present application. The brake disc flange can strengthen the connection between the brake disc and the brake connecting member and simplify the structure of the brake connecting member.

[0028] 8. The braking force transmission method of the present application is simple and efficient. The air brake structure generates a braking force acting on the brake member, and the brake member can directly act on the vehicle wheel hub after being transmitted once through the brake connector. Compared with the prior art, the transmission of braking force needs to pass through a drive motor and a reducer before acting on the vehicle wheel hub. The braking force transmission of the present application is more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the brake connector of this application;

[0030] Figure 2 This is a schematic structural diagram of the brake connector of the present application from another angle;

[0031] Figure 3 This is a cross-sectional view of the hub motor air brake structure of this application;

[0032] Figure 4 This is a schematic cross-sectional view of the air brake structure of the wheel hub motor of the present application;

[0033] Among them: 1-brake connector; 101-first connecting part; 1011-first connecting surface; 102-second connecting part; 1021-second connecting surface; 103-transition part; 2-hub motor; 201-drive motor; 202-planetary reducer; 3-wheel hub; 4-spoke; 5-rim; 6-brake part; 601-brake disc; 602-brake disc flange; 7-pneumatic brake structure; 701-brake caliper; 702-brake caliper bracket; 703-pneumatic brake. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0037] The present invention relates to a hub motor connector, a hub motor air brake structure and a vehicle. The present invention moves the brake structure from the narrow space of the rim to a larger space through the connector, thereby converting the hydraulic brake structure into an air brake structure that requires a larger space for installation. The air brake structure can realize the integrated braking function of the hub motor. The present invention improves the braking safety and economy of the hub motor under the premise of ensuring that the brake disc and the wheel rotate at the same speed.

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0039] A hub motor connector, specifically, Figure 1 , 2As shown, the present invention includes a brake connector 1, which is a cavity structure with openings at both ends, and is used to be set in the gap between the rim 5 and the hub motor 2. The brake connector 1 includes a transition portion 103, one end of the transition portion 103 is connected to the first connection portion 101, and the other end is connected to the second connection portion 102; wherein the first connection portion 101 is used to connect to the hub 3; the second connection portion 102 is used to connect to the brake member 6; the end of the transition portion 103 connected to the second connection portion 102 extends outwardly from the coverage range of the rim 5, so that the second connection portion 102 can be installed in the external space of the rim 5.

[0040] In fact, the wheel hub motor 2, wheel hub 3, wheel rim 5 and brake member 6 in this embodiment are all structures available in the prior art. The wheel hub motor 2 includes a motor part and a reducer part, and the reducer part is connected to the wheel hub 3. In the prior art, the brake member 6 is directly connected to the wheel hub 3 in a small space inside the wheel rim 5; while in this embodiment, the brake member 6 is located in a large space outside the wheel rim 5, which is convenient for connecting a larger brake structure, wherein the brake connector 1 plays a role in connecting the wheel hub 3 and the brake member 6, realizing synchronous rotation of the brake member 6 and the wheel hub 3, and avoiding the phenomenon of thermal decay caused by excessive rotation speed due to direct connection between the brake member 6 and the motor part of the wheel hub motor 2.

[0041] In actual operation, the brake connector 1 is made of light and high-strength material, which can reduce the weight of the hub motor air brake structure while ensuring the connection strength between the brake component 6 and the wheel hub 3, saving energy consumed by vehicle braking.

[0042] In some embodiments, the first connecting portion 101 is optimized, such as Figure 1 , 2 As shown, in this embodiment, a first connection surface 1011 is provided at one end of the first connection portion 101 away from the transition portion 103 . The first connection surface 1011 is used to connect to the hub connection surface of the hub 3 . The plane where the first connection surface 1011 is located is set at an angle to the axis of the transition portion 103 .

[0043] During actual work, the connection strength between the wheel hub 3 and the brake connector 1 can be strengthened through the connection between the surfaces; in fact, a plurality of connection holes are opened on the first connection surface 1011, and a plurality of connection holes are opened on the wheel hub connection surface of the wheel hub 3. The two are connected by bolts, which is convenient for actual installation and subsequent maintenance work.

[0044] In some embodiments, the second connecting portion 102 is optimized, such as Figure 1 , 2As shown, in this embodiment, a second connecting surface 1021 is provided at one end of the second connecting portion 102 away from the transition portion 103. The second connecting surface 1021 is used to connect to the brake connecting surface of the brake member 6. The plane where the second connecting surface 1021 is located is set at an angle to the axis of the transition portion 103.

[0045] During actual work, the connection strength between the brake member 6 and the brake connecting member 1 can be strengthened through the connection between the surfaces; in fact, a plurality of connection holes are opened on the second connecting surface 1021, and a plurality of connection holes are opened on the brake connecting surface of the brake member 6. The two are connected by bolts, which is convenient for actual installation and subsequent maintenance work.

[0046] In some embodiments, the transition portion 103 is optimized, such as Figure 1 , 2 As shown, in this embodiment, a plurality of ventilation holes are provided on the transition portion 103 .

[0047] In actual operation, the multiple ventilation holes opened on the transition part 103 can, on the one hand, increase the ventilation volume in the brake connector 1, which is helpful for heat dissipation of the hub motor 2; on the other hand, it can reduce the weight of the brake connector 1, which is beneficial to the lightweight design of the car.

[0048] A hub motor air brake structure, specifically, Figure 3 , 4 As shown, the present invention includes a brake connector 1, a wheel hub motor 2, a wheel hub 3, a rim 5, a brake member 6 and an air brake structure 7. The output end of the wheel hub motor 2 is connected to the wheel hub 3; one end of the brake connector 1 is connected to the wheel hub 3, and the other end extends out of the rim 5 and is connected to the brake member 6; the air brake structure 7 is connected to the axle and is used to brake the brake member 6; the wheel hub motor 2 is arranged in the rim 5.

[0049] In actual operation, since the brake part 6 is moved to a larger space outside the rim 5, the brake structure can select a larger air brake structure 7. Compared with the hydraulic brake structure, the air brake structure 7 can not only realize driving braking, but also realize parking braking. After installing the air brake structure 7, the parking brake component set due to hydraulic braking can be eliminated, thereby simplifying the structure of the hub motor.

[0050] Preferably, the above-mentioned hub motor 2 includes a drive motor 201 and a planetary reducer 202, the output end of the drive motor 201 is connected to the planetary reducer 202; the output end of the planetary reducer 202 is connected to the wheel hub 3, and the planetary reducer 202 can reduce the output speed of the drive motor 201 and increase the output torque of the drive motor 201, thereby ensuring the driving power of the wheel at a lower speed and avoiding excessive friction material loss or thermal decay of the brake part 6 due to excessive speed.

[0051] Preferably, the above-mentioned air brake structure includes a brake caliper 701, a brake caliper bracket 702 and a pneumatic brake 703. The brake caliper 701 is connected to the brake caliper bracket 702 for braking the brake disc 6; the brake caliper bracket 702 is connected to the vehicle axle; the pneumatic brake 703 is connected to the brake caliper 701 to provide pneumatic braking power for the brake caliper 701. The pneumatic brake 703 is a structure available in the prior art and has the characteristics of a driving and parking integrated braking function. The brake caliper bracket 702 is directly connected to the vehicle axle, which provides a guarantee for the stable working environment of the brake caliper 701; the air brake structure 7 is installed independently of the wheel hub motor 1 to facilitate subsequent vehicle maintenance and repair work.

[0052] In some embodiments, the above-mentioned brake connection member 1 is optimized, such as Figure 1 , 2 As shown, in this embodiment, the axial position of the brake connecting member 1 arranged in the wheel rim 5 is located in the gap between the wheel hub motor 2 and the wheel rim 5 .

[0053] In fact, the wheel hub 3 and the rim 5 together form a C-shaped cavity structure, the wheel hub motor 2 is located on the axis of the C-shaped cavity structure and is bolted to the wheel hub 3; the brake connector 1 is located in the space of the C-shaped cavity structure around the wheel hub motor 2 and is bolted to the wheel hub 3.

[0054] In some embodiments, the above-mentioned brake connection member 1 is optimized, such as Figure 1 , 2 As shown, in this embodiment, the brake connecting member 1 includes a transition portion 103, a first connecting portion 101 and a second connecting portion 102. The transition portion 103 is located in the gap between the hub motor 2 and the rim 5, with one end connected to the first connecting portion 101 and the other end connected to the second connecting portion 102; the first connecting portion 101 is connected to the wheel hub 3; and the second connecting portion 102 is connected to the brake member 6.

[0055] During actual operation, a plurality of bolt connection holes are provided on the first connection part 101, and the first connection part 101 is bolted to the wheel hub 3 through the plurality of bolt connection holes; a plurality of bolt connection holes are provided on the second connection part 1021, and the second connection part 102 is bolted to the brake component 6 through the plurality of bolt connection holes; a plurality of ventilation holes are provided on the circumferential surface of the transition part 103, which can increase the ventilation volume in the brake connection component 1 on the one hand, and contribute to the heat dissipation of the hub motor 2; on the other hand, it can reduce the weight of the brake connection component 1, which is beneficial to the lightweight design of the automobile.

[0056] In some embodiments, the above-mentioned brake member 6 is optimized, such as Figure 1 , 2As shown, in this embodiment, the brake component 6 includes a brake disc 601 and a brake disc flange 602 . The brake disc 601 is connected to the brake disc flange 602 by bolts; the brake disc flange 602 is connected to the flange surface of the brake connector 1 extending out of the rim 5 .

[0057] During actual operation, the brake disc flange 602 can strengthen the connection between the brake component 6 and the brake connector 1 and simplify the structure of the brake connector 1; the brake disc flange 602 can avoid direct connection between the brake disc 601 and the brake connector 1, weaken the heat transfer from the brake disc 601 to the brake connector 1, and help to enhance the service life of the brake connector 1; the brake disc flange 602 is connected to the flange surface of the brake connector 1, which increases the connection surface between the brake component 6 and the brake connector 1, and facilitates the connection between the brake component 6 and the brake connector 1 through bolts.

[0058] A vehicle, specifically, the vehicle of the present invention comprises any one of the above-mentioned hub motor air brake structures.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hub motor connector, characterized in that: include: A brake connector (1), the brake connector (1) being a cavity structure with openings at both ends, and being used to be arranged in a gap between a wheel rim (5) and a wheel hub motor (2), the brake connector (1) comprising a transition portion (103), one end of the transition portion (103) being connected to a first connection portion (101), and the other end of the transition portion (103) being connected to a second connection portion (102); Wherein, the first connecting portion (101) is used to connect the wheel hub (3); the second connecting portion (102) is used to connect the brake member (6); One end of the transition portion (103) connected to the second connection portion (102) extends outwardly beyond the coverage range of the rim (5), so that the second connection portion (102) can be installed in the external space of the rim (5).

2. The hub motor connector according to claim 1, characterized in that: A first connecting surface (1011) is provided at one end of the first connecting portion (101) facing away from the transition portion (103); the first connecting surface (1011) is used to connect to the hub connecting surface of the hub (3); and the plane where the first connecting surface (1011) is located is arranged at an angle to the axis of the transition portion (103).

3. The hub motor connector according to claim 1, characterized in that: A second connecting surface (1021) is provided at one end of the second connecting portion (102) away from the transition portion (103), and the second connecting surface (1021) is used to connect to the brake component connecting surface of the brake component (6), and the plane where the second connecting surface (1021) is located is arranged at an angle with the axis of the transition portion (103).

4. A hub motor connector according to any one of claims 1 to 3, characterized in that: The transition portion (103) is provided with a plurality of ventilation holes.

5. A hub motor air brake structure, characterized in that: include: A brake connector (1), a wheel hub motor (2), a wheel hub (3), a brake component (6) and an air brake structure (7), wherein the output end of the wheel hub motor (2) is connected to the wheel hub (3); one end of the brake connector (1) is connected to the wheel hub (3), and the other end extends out of the wheel rim (5) and is connected to the brake component (6); the air brake structure (7) is connected to the vehicle axle and is used for braking the brake component (6); and the wheel hub motor (2) is arranged inside the wheel rim (5).

6. The hub motor air brake structure according to claim 5, characterized in that: The axial position of the brake connection piece (1) arranged in the wheel rim (5) is located in the gap between the wheel hub motor (2) and the wheel rim (5).

7. The hub motor air brake structure as claimed in claim 5 or 6, characterized in that: The brake connecting member (1) comprises a transition portion (103), a first connecting portion (101) and a second connecting portion (102); the transition portion (103) is located in a gap between the wheel hub motor (2) and the wheel rim (5), one end of the transition portion (103) is connected to the first connecting portion (101), and the other end of the transition portion (103) is connected to the second connecting portion (102); the first connecting portion (101) is connected to the wheel hub (3); and the second connecting portion (102) is connected to the brake member (6).

8. The hub motor air brake structure as claimed in claim 7, characterized in that: The transition portion (103) is located in the gap between the wheel hub motor (2) and the wheel rim (5), and a plurality of ventilation holes are provided on its peripheral surface.

9. The hub motor air brake structure according to claim 5, characterized in that: The brake component (6) comprises a brake disc (601) and a brake disc flange (602); the brake disc (601) is connected to the brake disc flange (602); and the brake disc flange (602) is connected to a flange surface of the brake connecting component (1) extending out of the wheel rim (5).

10. A vehicle, characterized in that: The vehicle comprises a hub motor air brake structure as described in any one of claims 5-9.

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