A carbon fiber composite material commercial electric vehicle drive axle

Abstract

The present invention specifically relates to a carbon fiber composite material commercial electric vehicle drive axle, and belongs to the technical field of drive axles. The carbon fiber composite material commercial electric vehicle drive axle includes a bridge housing, the bridge housing is provided with a reducer, the output end of the reducer is connected to the half-axle rotatably provided on the bridge housing, the input end of the reducer is provided with a motor, and also includes a brake device, the brake device includes a brake assembly and a second brake part. The brake assembly includes a seat body and a first brake part, the seat body is connected to the input end of the reducer, and the first brake part is positionally adjustable along the rotation axis of the input end. The second brake part is movably connected to the fixed end of the reducer along the rotation axis of the input end. When the first brake part and the second brake part are closed, the input end of the reducer can be locked, so that the vehicle can be locked. Compared with the traditional parking method, the structure is simplified, and it has the advantages of simple and reliable structure, and the reliability is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of drive axles, and in particular relates to a carbon fiber composite material commercial electric vehicle drive axle. Background Art

[0002] The drive axle is an important component of the automobile transmission system. It can transmit torque, reduce speed and increase torque, achieve differential speed, and withstand the torque acting between the road surface and the frame or body.

[0003] Traditional drive axles do not have a braking function, so the vehicle mainly achieves parking brakes by locking the wheels. However, this method requires braking multiple wheels at the same time, which makes the required structure complex and reduces reliability. Summary of the invention

[0004] The object of the present invention is to provide a carbon fiber composite material commercial electric vehicle drive axle, which has a braking function so that a vehicle using the drive axle can achieve parking brake.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows: The embodiment of the present application provides a carbon fiber composite material commercial electric vehicle drive bridge, including a bridge housing, the bridge housing is provided with a reducer, the output end of the reducer is connected to the half-axle rotatably provided on the bridge housing, the input end of the reducer is provided with a motor, and also includes a brake device, the brake device includes a brake assembly and a second brake part. The brake assembly includes a seat body and a first brake part, the seat body is connected to the input end of the reducer, and the first brake part is adjustably connected to the seat body along the rotation axis of the input end. The second brake part is movably connected to the fixed end of the reducer along the rotation axis of the input end, and the second brake part abuts against the first brake part to achieve a braking function.

[0006] In some embodiments, the first brake portion and the second brake portion each include a carbon fiber composite material.

[0007] In some embodiments, the brake device further includes a protective sleeve, which is movably connected to the fixed end of the reducer along the rotation axis of the input end, and the second brake portion is disposed on the inner wall of the protective sleeve.

[0008] In some embodiments, the seat body is provided with a accommodating cavity, the accommodating cavity is provided with an opening, the first brake part is inserted into the accommodating cavity through the opening, a sliding hole is provided in the accommodating cavity, the axial direction of the sliding hole extends along the rotation axis of the input end, a sliding rod is inserted in the sliding hole, the sliding rod is connected to the first brake part, and an elastic member is provided between the sliding rod and the seat body.

[0009] In some embodiments, the brake assembly also includes a limiting portion, which is movably connected to the seat body, and the limiting portion abuts against the side of the first brake portion facing away from the interior of the accommodating cavity. The limiting portion is provided with a driving inclined surface, and the second brake portion is provided with a supporting portion, and the supporting portion abuts against the driving inclined surface, so that when the second brake portion approaches the first brake portion, the supporting portion and the driving inclined surface cooperate to move the limiting portion away from the first brake portion.

[0010] In some embodiments, the seat body is provided with a material cavity, the accommodating cavity is arranged circumferentially around the material cavity, a connecting passage is arranged between the material cavity and the accommodating cavity, and filling spheres are respectively arranged in the material cavity and the accommodating cavity.

[0011] In some embodiments, the accommodating chamber includes a first side wall facing the material chamber, the first side wall is provided with a through hole, the connecting channel is connected to the through hole, and a discharge channel is provided at one end of the through hole close to the interior of the accommodating chamber. The discharge channel is curved, and the outlet of the discharge channel is toward the side of the first side wall away from the opening.

[0012] In some embodiments, an axial direction of the inlet end of the discharge channel and an axial direction of the through hole are collinear.

[0013] In some embodiments, the diameter of the filling sphere is L, the discharge channel includes a bottom edge close to the first side wall and a high edge away from the first side wall, the distance from the bottom edge to the first side wall is less than L, and the distance from the high edge to the first side wall is less than 2L.

[0014] In some embodiments, the diameter of the filling sphere is L, and the outlet of the discharge channel is provided with an elastic sleeve, and the inner diameter of the outlet of the elastic sleeve is smaller than L.

[0015] The present invention has the following beneficial effects:

[0016] 1. When the first brake part and the second brake part are closed, the input end of the reducer can be locked, so that the vehicle can be locked. Compared with the traditional method of locking the wheels to achieve the parking function, the structure is simplified, and the brake device of the embodiment of the present application has the advantages of simple and reliable structure, which increases reliability.

[0017] 2. The first brake part and the second brake part made of carbon fiber composite material have the advantage of being lightweight on the one hand, and having good wear resistance on the other hand, thereby increasing the service life of the first brake part and the second brake part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the carbon fiber composite material commercial electric vehicle drive axle of the present invention;

[0019] Figure 2 A schematic diagram of the internal structure of the protective cover of the carbon fiber composite material commercial electric vehicle drive axle of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the brake device of the present invention;

[0021] Figure 4 for Figure 3 A magnified image of point A;

[0022] Figure 5 for Figure 4 Enlarged view of point B.

[0023] Figure numbers: 1-bridge housing, 2-reducer, 3-motor, 4-brake device, 5-hydraulic cylinder, 6-rotating shaft, 7-protective cover, 8-seat body, 9-material cavity, 10-second brake part, 11-accommodating cavity, 12-first brake part, 13-limiting part, 14-driving inclined plane, 15-elastic member, 16-slide rod, 17-abutting part, 18-through hole, 19-discharge channel, 20-filling ball, 21-elastic sleeve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0025] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a carbon fiber composite material commercial electric vehicle drive bridge, including a bridge housing 1, the bridge housing 1 is provided with a reducer 2, the output end of the reducer 2 is connected to the half shaft rotatably provided on the bridge housing 1, the input end of the reducer 2 is provided with a motor 3, and also includes a brake device 4, the brake device 4 includes a brake assembly and a second brake part 10. The brake assembly includes a seat body 8 and a first brake part 12, the seat body 8 is connected to the input end of the reducer 2, and the first brake part 12 is adjustably connected to the seat body 8 along the rotation axis of the input end. The second brake part 10 is movably connected to the fixed end of the reducer 2 along the rotation axis of the input end, and the second brake part 10 abuts against the first brake part 12 to achieve a braking function.

[0027] The detailed working process of the drive axle is well known to those skilled in the art. In summary, the torque of the motor 3 is input to the reducer 2, and the torque of the reducer 2 is output to the half-axle, so that the wheel hub connected to the half-axle can rotate.

[0028] The rotating shaft 6 at the input end of the reducer 2 can extend out of the housing of the reducer 2, so that the seat body 8 can be connected to the rotating shaft 6 at the input end.

[0029] The first brake portion 12 is adjustably connected to the seat body 8, so that the position of the first brake portion 12 can be adjusted, thereby making the first brake portion 12 and the second brake portion 10 fit more closely, thereby improving the braking effect.

[0030] The second brake part 10 can be connected to the housing of the reducer 2 .

[0031] When the first brake part 12 and the second brake part 10 are closed, the input end of the reducer 2 can be locked, so that the vehicle can be locked. Compared with the traditional method of locking the wheels to achieve the parking function, the structure is simplified, and the braking device 4 of the embodiment of the present application has the advantages of simple and reliable structure, which increases reliability.

[0032] In the embodiment of the present application, the first brake portion 12 may be an annular structure, so that when the seat body 8 rotates to any angle, the first brake portion 12 can contact the second brake portion 10 .

[0033] In some embodiments, the first brake portion 12 and the second brake portion 10 respectively include carbon fiber composite materials.

[0034] For example, the first brake part 12 and the second brake part 10 can be made of carbon fiber ceramic material respectively. Alternatively, the first brake part 12 and the second brake part 10 can be made of carbon fiber ceramic material.

[0035] The first brake part 12 and the second brake part 10 made of carbon fiber composite materials have the advantage of being lightweight on one hand, and having good wear resistance on the other hand, thereby increasing the service life of the first brake part 12 and the second brake part 10 .

[0036] See also Figure 3 In some embodiments, the brake device 4 further includes a protective cover 7 , which is movably connected to the fixed end of the reducer 2 along the rotation axis of the input end, and the second brake portion 10 is disposed on the inner wall of the protective cover 7 .

[0037] The fixed end of the reducer 2 may be provided with a hydraulic cylinder 5 , and the protective cover 7 is connected to the telescopic end of the hydraulic cylinder 5 , so that the protective cover 7 can be movably connected to the fixed end of the reducer 2 .

[0038] The second brake part 10 is arranged on the inner wall of the protective cover 7, so that when the first brake part 12 and the second brake part 10 are in contact, both are located inside the protective cover 7, reducing the risk of external dust and gravel entering between the first brake part 12 and the second brake part 10, causing abnormal noise during braking or damage to the first brake part 12 and the second brake part 10.

[0039] See also Figure 3 and Figure 4 In some embodiments, the seat body 8 is provided with a accommodating cavity 11, the accommodating cavity 11 is provided with an opening, the first brake portion 12 is inserted into the accommodating cavity 11 via the opening, a sliding hole is provided in the accommodating cavity 11, the axial direction of the sliding hole extends along the rotation axis of the input end, a sliding rod 16 is inserted in the sliding hole, the sliding rod 16 is connected to the first brake portion 12, and an elastic member 15 is provided between the sliding rod 16 and the seat body 8.

[0040] The first brake portion 12 is inserted into the opening, and the opening plays a role similar to a slide groove, so that the first brake portion 12 can be movably connected to the accommodating cavity 11.

[0041] The cooperation between the slide rod 16 and the slide hole increases the connection strength between the first brake part 12 and the accommodating cavity 11 on the one hand, and increases the movement accuracy of the first brake part 12 relative to the accommodating cavity 11 on the other hand.

[0042] The elastic member 15 may be a spring.

[0043] The elastic member 15 is used to compensate for the first brake portion 12 , so that even if the first brake portion 12 is worn, the first brake portion 12 is still in contact with the second brake portion 10 .

[0044] See also Figure 3 and Figure 4 In some embodiments, the brake assembly further includes a limiting portion 13, which is movably connected to the seat body 8, and abuts against a side of the first brake portion 12 which is away from the interior of the accommodating chamber 11. The limiting portion 13 is provided with a driving inclined surface 14, and the second brake portion 10 is provided with a supporting portion 17, and the supporting portion 17 abuts against the driving inclined surface 14, so that when the second brake portion 10 approaches the first brake portion 12, the supporting portion 17 and the driving inclined surface 14 cooperate to move the limiting portion 13 away from the first brake portion 12.

[0045] The moving direction of the limiting portion 13 relative to the seat body 8 may be perpendicular to the normal direction of the first braking portion 12 , so that the limiting portion 13 can move relative to the seat body 8 while being in contact with the first braking portion 12 .

[0046] The specific inclination direction of the driving inclined surface 14 can be set as required so as to ensure that the abutting portion 17 can push the limiting portion 13 to move when the second braking portion 10 is closed toward the first braking portion 12 .

[0047] The limiting portion 13 reduces the risk of the first brake portion 12 being separated from the accommodating cavity 11. By reasonably setting the inclination angle and length of the driving inclined surface 14, the following effects can be achieved: when the first brake portion 12 and the second brake portion 10 are closed, when the limiting portion 13 just leaves the first brake portion 12 and the two are no longer in contact, the second brake portion 10 just contacts the first brake portion 12. When the first brake portion 12 and the second brake portion 10 are separated, when the second brake portion 10 just separates from the first brake portion 12, the limiting portion 13 just contacts the first brake portion 12.

[0048] In the embodiment of the present application, a spring may be provided between the limiting portion 13 and the seat body 8 to provide an elastic force that enables the limiting portion 13 to maintain the limiting effect on the first brake portion 12 .

[0049] The specific connection structure of the movably connected limiting portion 13 and the seat body 8 can be selected from existing structures.

[0050] See also Figure 3 and Figure 4 In some embodiments, the seat body 8 is provided with a material cavity 9, and the accommodating cavity 11 is circumferentially arranged around the material cavity 9. A connecting passage is provided between the material cavity 9 and the accommodating cavity 11, and filling spheres 20 are respectively provided in the material cavity 9 and the accommodating cavity 11.

[0051] The filling spheres 20 may be metal spheres.

[0052] The filling ball 20 in the accommodating cavity 11 is used to support the first brake part 12. When the first brake part 12 and the second brake part 10 are closed, only the elastic member 15 provides a reaction, which may be insufficient and reduce the braking effect.

[0053] The filling sphere 20 supports the first brake part 12 , thereby increasing the braking effect between the first brake part 12 and the second brake part 10 .

[0054] After long-term use, the first brake part 12 may be worn out. At this time, the second brake part 10 may not be in full contact with the first brake part 12 according to the originally set movement stroke, thereby reducing the braking effect.

[0055] When the first brake part 12 is worn, the first brake part 12 abuts against the limiting part 13, and the volume of the space enclosed by the first brake part 12 and the accommodating chamber 11 increases, and the supporting effect of the elastic member 15 on the first brake part 12 is weakened. At this time, when the input end of the reducer 2 is working and rotating, under the action of centrifugal force, the filling spheres 20 in the material cavity 9 can enter the accommodating chamber 11, and then the number of filling spheres 20 in the accommodating chamber 11 increases, so that after the first brake part 12 is worn, the filling spheres 20 can still play a good supporting role for the first brake part 12, thereby ensuring the braking effect of the first brake part 12 and the second brake part 10.

[0056] See also Figure 4 and Figure 5 In some embodiments, the accommodating chamber 11 includes a first side wall facing the material chamber 9, the first side wall is provided with a through hole 18, the connecting channel is connected to the through hole 18, and a discharge channel 19 is provided at one end of the through hole 18 close to the interior of the accommodating chamber 11. The discharge channel 19 is curved, and the outlet of the discharge channel 19 is toward the side of the first side wall away from the opening.

[0057] The filling ball 20 passes through the through hole 18 and then through the discharge channel 19 into the accommodating chamber 11 .

[0058] The discharge channel 19 is curved, which reduces the risk of the filling balls 20 flowing back into the material cavity 9.

[0059] The outlet of the discharge channel 19 faces the side of the first side wall away from the opening, which reduces the risk of the filling balls 20 at the outlet of the discharge channel 19 being squeezed into the discharge channel 19 by the squeezing force from the first brake part 12 .

[0060] In some embodiments, the axial direction of the inlet end of the discharge passage 19 and the axial direction of the through hole 18 are collinear.

[0061] The advantage of such a configuration is that it facilitates the filling of the balls 20 into the discharge channel 19 .

[0062] See also Figure 5 In some embodiments, the diameter of the filling sphere 20 is L, and the discharge channel 19 includes a bottom edge close to the first side wall and a high edge away from the first side wall, the distance from the bottom edge to the first side wall is less than L, and the distance from the high edge to the first side wall is less than 2L.

[0063] The distance M from the bottom edge to the first side wall is less than L, so that the filling sphere 20 against the first side wall will be against the bottom edge of the discharge channel 19, and will not enter the discharge channel 19. The distance N from the high edge to the first side wall is less than 2L, so that when two filling spheres 20 are overlapped at the first side wall, the filling sphere 20 close to the first side wall is against the bottom edge of the discharge channel 19, and the filling sphere 20 away from the first side wall is against the high edge of the discharge channel 19, thereby reducing the risk of the filling sphere 20 flowing back to the material chamber 9 from the outlet of the discharge channel 19.

[0064] See also Figure 5 In some embodiments, the diameter of the filling sphere 20 is L, and the outlet of the discharge channel 19 is provided with an elastic sleeve 21, and the inner diameter of the outlet of the elastic sleeve 21 is smaller than L.

[0065] When the filling ball 20 is discharged from the outlet of the discharge channel 19 , it first enters the elastic sleeve 21 , and then the elastic sleeve 21 deforms to discharge the filling ball 20 , reducing the risk of the filling ball 20 flowing back to the material chamber 9 from the outlet of the discharge channel 19 .

[0066] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A carbon fiber composite material commercial electric vehicle drive axle, comprising an axle housing (1), the axle housing (1) being provided with a reducer (2), the output end of the reducer (2) being drivingly connected to a half-shaft rotatably arranged on the axle housing (1), the input end of the reducer (2) being provided with a motor (3), characterized in that: It also includes a brake device (4), wherein the brake device (4) includes: The brake assembly comprises a seat body (8) and a first brake part (12), wherein the seat body (8) is connected to the input end of the reducer (2), and the first brake part (12) is adjustably connected to the seat body (8) along the rotation axis of the input end, the seat body (8) is provided with a receiving cavity (11), the receiving cavity (11) is provided with an opening, the first brake part (12) is inserted into the receiving cavity (11) via the opening, a sliding hole is provided in the receiving cavity (11), the axial direction of the sliding hole extends along the rotation axis of the input end, a sliding rod (16) is inserted in the sliding hole, the sliding rod (16) is connected to the first brake part (12), and the sliding rod (11) is provided with a plurality of sliding holes. An elastic member (15) is arranged between the first brake member (12) and the seat body (8), the brake assembly further comprising a limiting portion (13), the limiting portion (13) being movably connected to the seat body (8), the limiting portion (13) being against a side of the first brake member (12) facing away from the interior of the accommodating chamber (11), the limiting portion (13) being provided with a driving inclined surface (14), the seat body (8) being provided with a material chamber (9), the accommodating chamber (11) being arranged circumferentially around the material chamber (9), a connecting passage being arranged between the material chamber (9) and the accommodating chamber (11), and filling spheres (20) being arranged in the material chamber (9) and the accommodating chamber (11) respectively; The second brake part (10) is movably connected to the fixed end of the reducer (2) along the rotation axis of the input end, and the second brake part (10) abuts against the first brake part (12) to achieve a braking function. The second brake part (10) is provided with a supporting part (17), and the supporting part (17) abuts against the driving inclined surface (14), so that when the second brake part (10) approaches the first brake part (12), the supporting part (17) and the driving inclined surface (14) cooperate to move the limiting part (13) away from the first brake part (12).

2. The carbon fiber composite material commercial electric vehicle drive axle according to claim 1, characterized in that: The first brake part (12) and the second brake part (10) respectively comprise carbon fiber composite materials.

3. The carbon fiber composite material commercial electric vehicle drive axle according to claim 1, characterized in that: The brake device (4) further comprises a protective sleeve (7), which is movably connected to the fixed end of the reducer (2) along the rotation axis of the input end, and the second brake portion (10) is arranged on the inner wall of the protective sleeve (7).

4. The carbon fiber composite material commercial electric vehicle drive axle according to claim 1, characterized in that: The accommodating chamber (11) comprises a first side wall facing the material chamber (9), the first side wall being provided with a through hole (18), the connecting passage being connected with the through hole (18), an exhaust passage (19) being provided at one end of the through hole (18) close to the interior of the accommodating chamber (11), the exhaust passage (19) being curved, and an outlet of the exhaust passage (19) being oriented toward a side of the first side wall away from the opening.

5. The carbon fiber composite material commercial electric vehicle drive axle according to claim 4, characterized in that: The axial direction of the inlet end of the discharge channel (19) and the axial direction of the through hole (18) are collinear.

6. The carbon fiber composite material commercial electric vehicle drive axle according to claim 4, characterized in that: The filling sphere (20) has a diameter of L, and the discharge channel (19) comprises a bottom edge close to the first side wall and a high edge away from the first side wall, the distance between the bottom edge and the first side wall is less than L, and the distance between the high edge and the first side wall is less than 2L.

7. The carbon fiber composite material commercial electric vehicle drive axle according to claim 4, characterized in that: The diameter of the filling sphere (20) is L, and the outlet of the discharge channel (19) is provided with an elastic sleeve (21), and the inner diameter of the outlet of the elastic sleeve (21) is smaller than L.

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