Drive axle assembly and vehicle with same

Abstract

The utility model discloses a drive axle assembly and a vehicle with the drive axle assembly. The drive axle assembly comprises an axle housing, a transmission shaft and a drive assembly. The drive axle assembly is used for a vehicle, the axle housing extends in the first direction and is connected with a vehicle body, and the axle housing is an integrated piece; the transmission shafts extend in the first direction and penetrate through the axle housing in the first direction, the two transmission shafts are arranged in the first direction in a spaced mode, and the ends, away from each other, of the two transmission shafts extend out of the axle housing and are suitable for being connected with wheels; the driving assembly is connected with the axle housing and used for driving the two transmission shafts to rotate. According to the drive axle assembly, the structural strength of the drive axle assembly is high, and the bearing capacity is high.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a drive axle assembly and a vehicle having the same. Background Technology

[0002] In related technologies, such as electric forklifts, the drive axle is a key component that transmits the power generated by the motor to the wheels. The drive axle connects multiple components and supports the vehicle body, but existing drive axle structures have poor strength and cannot bear large loads. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a drive axle assembly with high structural strength and strong load-bearing capacity.

[0004] This utility model also proposes a vehicle that includes the aforementioned drive axle assembly.

[0005] A drive axle assembly according to an embodiment of the present invention includes: an axle housing, a drive shaft, and a drive assembly. The drive axle assembly is used in a vehicle. The axle housing extends along a first direction and is connected to the vehicle body; the axle housing is a single piece. The drive shaft extends along the first direction and passes through the axle housing in the first direction. There are two drive shafts, spaced apart along the first direction, with one end of each drive shaft extending out of the axle housing and adapted to connect to a wheel. The drive assembly is connected to the axle housing and is used to drive the two drive shafts to rotate.

[0006] According to the drive axle assembly of this utility model embodiment, by using the drive axle assembly in a vehicle, the drive component and two drive shafts are connected to the vehicle body through the axle housing. The two drive shafts pass through the axle housing along a first direction and are respectively connected to the wheels. The drive component is used to drive the two drive shafts to rotate, thereby driving the two wheels to rotate and realizing vehicle movement. The axle housing is a single piece, which enhances the structural strength of the axle housing, allowing it to bear a greater load, thus improving the load-bearing capacity of the drive axle assembly.

[0007] According to some embodiments of the present invention, the bridge housing includes a main body and a support shaft, the drive assembly is connected to the main body, at least a portion of the drive assembly extends into the main body and is connected to the transmission shaft; the support shaft extends along the first direction, there are two support shafts, the two support shafts are connected to the two ends of the main body along the first direction, and the two transmission shafts are respectively inserted into the two support shafts.

[0008] According to some embodiments of the present invention, the drive assembly includes two motors, and the output shafts of the two motors are respectively connected to the two transmission shafts to drive the two transmission shafts to rotate.

[0009] In some embodiments of this utility model, the drive assembly further includes a transmission having two input ends and two output ends. The two input ends of the transmission are respectively connected to the output shafts of the two motors, and the two output ends of the transmission are respectively connected to the two drive shafts.

[0010] In some embodiments of this utility model, the output shafts of the two motors are collinear, and the two motors are symmetrically arranged about the center plane of the drive axle assembly along the first direction.

[0011] In some embodiments of this utility model, the motor is a disc motor.

[0012] According to some embodiments of the present invention, the drive axle assembly further includes a sector plate, which is sleeved on the axle housing and connected to the axle housing and the vehicle body respectively.

[0013] In some embodiments of this utility model, there are multiple sector plates, and the multiple sector plates are spaced apart along the first direction.

[0014] In some embodiments of this utility model, the sector plate includes a fixed shaft and a sector portion, the fixed shaft being sleeved on the axle housing; the sector portion is fan-shaped, the radial inner end of the sector portion is connected to the outer peripheral wall of the fixed shaft, the radial outer end of the sector portion is connected to the vehicle body, and the radial outer end of the sector portion is provided with a notch penetrating the sector portion along the first direction.

[0015] According to some embodiments of the present invention, the drive axle assembly further includes brakes, and the brakes are connected to both ends of the axle housing along the first direction. The two brakes are respectively connected to the two wheels for braking the two wheels respectively.

[0016] In some embodiments of this utility model, the brake includes a base plate, a brake drum, a brake shoe, and a drive component. The base plate is sleeved on the axle housing and fixedly connected to the axle housing. The brake drum is arranged in a ring around the axle housing and along the first direction with the base plate. The brake drum is rotatable relative to the base plate, and one end of the brake drum away from the base plate is connected to the wheel. The brake shoe is located between the brake drum and the axle housing and is movably connected to the base plate. The drive component is located on the base plate and is connected to the vehicle's brake pedal and the brake shoe, respectively, for controlling the brake shoe to abut or separate from the brake drum.

[0017] In some embodiments of this utility model, the brake further includes a cable disposed inside the brake drum. The cable is connected to the parking brake lever and the brake shoes of the vehicle, respectively, for controlling the brake shoes to abut or separate from the brake drum.

[0018] According to some embodiments of the present invention, the drive axle assembly further includes a hub, which is rotatably fitted onto the axle housing. The axle housing is connected to the hub at both ends along the first direction. The two hubs are respectively connected to the two drive shafts and to the two wheels.

[0019] In some embodiments of this utility model, a bearing is provided between the wheel hub and the axle housing.

[0020] The vehicle according to an embodiment of the present invention includes: the drive axle assembly described above.

[0021] According to an embodiment of the present invention, the vehicle utilizes a drive axle assembly. The drive assembly and two drive shafts are connected to the vehicle body via an axle housing. The two drive shafts pass through the axle housing in a first direction and are respectively connected to the wheels. The drive assembly drives the two drive shafts to rotate, thereby rotating the two wheels and enabling the vehicle to move. The axle housing is a single piece, which enhances its structural strength, allows it to bear a greater load, and thus improves the load-bearing capacity of the drive axle assembly, thereby enhancing the vehicle's driving stability.

[0022] In some embodiments of this utility model, the vehicle is an electric forklift.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a perspective view of the drive axle assembly according to an embodiment of the present utility model;

[0026] Figure 2 This is a top view of the drive axle assembly according to an embodiment of the present utility model;

[0027] Figure 3 This is a top view of the drive axle assembly according to an embodiment of the present utility model, which does not include the drive components;

[0028] Figure 4yes Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 This is a perspective view of the axle housing of the drive axle assembly according to an embodiment of the present utility model;

[0030] Figure 6 This is a perspective view of the drive assembly of the drive axle assembly according to an embodiment of the present utility model;

[0031] Figure 7 This is a perspective view of the sector plate of the drive axle assembly according to an embodiment of the present utility model.

[0032] Figure label:

[0033] 100. Drive axle assembly;

[0034] 1. Bridge housing; 11. Main body; 111. First cavity; 112. Opening; 12. Support shaft; 121. Second cavity;

[0035] 2. Drive shaft;

[0036] 3. Drive assembly; 31. Motor; 32. Gearbox; 321. First gear; 322. Second gear;

[0037] 4. Sector-shaped plate; 41. Fixed shaft; 42. Sector-shaped part; 421. Notch; 43. Mounting part; 431. Mounting hole;

[0038] 5. Brake; 51. Base plate; 52. Brake drum; 53. Brake shoes; 54. Brake pads;

[0039] 6. Wheel hub; 61. Bearing; 611. Inner bearing; 612. Outer bearing. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The following is for reference. Figures 1-7 Description of a drive axle assembly 100 according to an embodiment of the present invention.

[0044] like Figures 1-4 As shown, the drive axle assembly 100 according to an embodiment of the present utility model includes an axle housing 1, a drive shaft 2, and a drive component 3.

[0045] Specifically, such as Figures 1-5 As shown, the drive axle assembly 100 is used in a vehicle. The axle housing 1 extends along a first direction and is connected to the vehicle body; the axle housing 1 is a single piece. Two drive shafts 2 extend along the first direction and pass through the axle housing 1. The two drive shafts 2 are spaced apart along the first direction, with one end of each drive shaft 2 extending out of the axle housing 1 and adapted to connect to a wheel. The drive assembly 3 is connected to the axle housing 1 and is used to drive the two drive shafts 2 to rotate.

[0046] Both the drive assembly 3 and the drive shaft 2 are connected to the vehicle body through the axle housing 1. The drive assembly 3 has two output ends, which are respectively connected to the ends of the two drive shafts 2 that are close to each other. The drive assembly 3 can output torque to drive the two drive shafts 2 to rotate respectively. The two drive shafts 2 are respectively connected to the left and right wheels of the vehicle, thereby driving the two wheels to rotate and realize the vehicle movement.

[0047] Among them, the axle housing 1 is a single piece. Compared with the method of dividing the axle housing into two or more parts and connecting them into one piece through an intermediate connecting part, the single-piece axle housing 1 has higher structural strength and can bear a greater load, thereby improving the load-bearing capacity of the drive axle assembly 100.

[0048] Furthermore, the bridge housing 1 can be integrally machined by casting, which is simple, convenient, and low-cost, and can also improve production efficiency. Further, the bridge housing 1 can be made of cast steel, gray cast iron, or ductile iron, etc. This application does not specifically limit the specific processing method, material, and specifications of the bridge housing 1.

[0049] According to the drive axle assembly 100 of this utility model embodiment, by using the drive axle assembly 100 in a vehicle, the drive component 3 and the two drive shafts 2 are all connected to the vehicle body through the axle housing 1. The two drive shafts 2 pass through the axle housing 1 along a first direction and are respectively connected to the wheels. The drive component 3 is used to drive the two drive shafts 2 to rotate, thereby driving the two wheels to rotate and realizing vehicle movement. The axle housing 1 is a single piece, which enhances the structural strength of the axle housing 1, allowing it to bear a greater load, thus improving the load-bearing capacity of the drive axle assembly 100.

[0050] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 5 As shown, the axle housing 1 includes a main body 11 and a support shaft 12. A drive assembly 3 is connected to the main body 11, and at least a portion of the drive assembly 3 extends into the main body 11 and connects to the drive shaft 2. The support shaft 12 extends along a first direction, and there are two support shafts 12 connected at both ends of the main body 11 along the first direction. Two drive shafts 2 are respectively inserted into the two support shafts 12. The structural design is reasonable. By dividing the axle housing 1 into the main body 11 and the support shaft 12, it facilitates the rotatable installation of the two drive shafts 2 within the two support shafts 12 and their connection to the wheels. It also facilitates the connection of the drive assembly 3 to the main body 11 while simultaneously connecting it to the two drive shafts 2.

[0051] The main body 11 has a first cavity 111 inside, and the first cavity 111 is along a second direction (such as...). Figure 5One end of the drive assembly 3 (as shown) is open, and the drive assembly 3 is connected to the end of the main body 11 with an open opening 112. At least a portion of the two output ends of the drive assembly 3 extends into the first cavity 111 through the open opening 112 and is connected to the two drive shafts 2. The second direction is perpendicular to the first direction. The support shaft 12 has a second cavity 121 that extends along the first direction and passes through the support shaft 12. The first cavity 111 and the second cavity 121 are connected, which ensures that the two drive shafts 2 can pass through the second cavity 121 and extend out of the support shaft 12 while being connected to the drive assembly 3, so as to achieve connection with the wheel. This ensures the transmission and connection between the various components, maximizes the use of the internal space of the axle housing 1, and has a compact and reasonable structural arrangement. In addition, the first cavity 111 and the second cavity 121 pass through the axle housing 1 along the first direction, which makes it easy for the axle housing 1 to adapt to different drive shafts 2 and drive assemblies 3. Regardless of whether the drive assembly 3 is equipped with one motor 31 or two motors 31, the axle housing 1 can be used universally, which can effectively improve the adaptability and flexibility of the axle housing 1, thereby facilitating mass production and assembly and helping to reduce costs.

[0052] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 6 As shown, the drive assembly 3 includes two motors 31, the output shafts of which are respectively connected to two drive shafts 2 to drive the two drive shafts 2 to rotate. The two motors 31 provide torque to drive the drive shafts 2 to rotate, facilitating the separate driving of the two drive shafts 2 and the two wheels at different speeds, thus enabling vehicle turning. Furthermore, the separate driving by the two motors 31 allows for precise control of the rotation of the two wheels, causing them to rotate in opposite directions, which helps to reduce the vehicle's turning radius.

[0053] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 6 As shown, the drive assembly 3 also includes a transmission 32, which has two input terminals and two output terminals. The two input terminals of the transmission 32 are respectively connected to the output shafts of the two motors 31, and the two output terminals of the transmission 32 are respectively connected to the two drive shafts 2. The transmission 32 contains two sets of cooperating transmission components, allowing it to simultaneously transmit the torque of the two motors 31 to the two drive shafts 2, avoiding mutual interference between the two motors 31 and the two drive shafts 2. The transmission 32 incorporates multi-stage transmission components such as transmission gears, which increase torque while achieving transmission, thereby reducing the load on the motors 31.

[0054] Specifically, the two output ends of the transmission 32 can be a first gear 321 and a second gear 322. The first gear 321 is splinedly connected to one of the drive shafts 2, and the second gear 322 is splinedly connected to the other drive shaft 2, thereby achieving stable transmission between the transmission 32 and the drive shaft 2.

[0055] Preferably, in this application, the motor 31, the gearbox 32, the drive shaft 2 and the wheel are not transmitted through a wheel-side planetary transmission mechanism, which can avoid the problem of low output torque and is conducive to improving the transmission stability and reliability of the drive axle assembly 100.

[0056] In addition, the brakes 5 are located at both ends of the axle housing 1 along the first direction, which can realize both service braking and parking braking at the same time. There is no need to set up a separate parking brake mechanism in the transmission 32, which can simplify the internal structure of the transmission 32 and reduce costs.

[0057] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 6 As shown, the output shafts of the two motors 31 are collinear, and the two motors 31 are symmetrically arranged about the center plane of the drive axle assembly 100 along the first direction. The symmetrical arrangement of the two motors 31 and the collinearity of their output shafts, along with the coaxial arrangement of the two drive shafts 2 and their symmetrical arrangement about the center plane of the drive axle assembly 100 along the first direction, facilitates the transmission connection between the two motors 31 and the two drive shafts 2, simplifying the transmission structure between them. For example, the two motors 31 can be connected to the two drive shafts via a gearbox 32. The two sets of transmission components within the gearbox 32 can be symmetrically arranged, reducing assembly difficulty and improving the production and assembly efficiency of the drive axle assembly 100.

[0058] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 6 As shown, motor 31 is a disc motor 31. The output shaft of motor 31 extends along the first direction. The axial dimension of disc motor 31 is short, which can effectively save the installation space occupied by motor 31, thus making it suitable for small vehicles such as small-tonnage electric forklifts.

[0059] Preferably, the motor 31 is a disc-type water-cooled motor 31. Of course, the motor 31 can also be an air-cooled motor 31, as long as the heat dissipation effect of the motor 31 can be guaranteed according to the requirements.

[0060] In some embodiments of this utility model, such as Figures 1-4 and Figure 7As shown, the drive axle assembly 100 also includes a sector plate 4, which is fitted onto the axle housing 1 and connected to both the axle housing 1 and the vehicle body. The sector plate 4 serves a positioning and connecting function. Mounting holes 431 can be designed on the sector plate 4 to facilitate its connection with both the axle housing 1 and the vehicle body, thereby ensuring the stability of the connection between the drive axle assembly 100 and the vehicle body. Positioning grooves can also be provided on the sector plate 4 to facilitate positioning during assembly and installation, thereby reducing assembly difficulty and improving installation accuracy.

[0061] Preferably, the axle housing 1 and the vehicle body can be connected by axle mounting or by bracket mounting to ensure the stability of the connection between the axle housing 1 and the vehicle body.

[0062] In some embodiments of this utility model, such as Figures 1-3 As shown, there are multiple sector plates 4, spaced apart along the first direction. In this way, the axle housing 1 can be connected to the vehicle body at multiple points via multiple sector plates 4, which enhances the connection stability between the axle housing 1 and the vehicle body, thereby ensuring vehicle reliability and driving safety. Figure 1 In the example shown, there are two sector plates 4, but there can also be three, four, etc.

[0063] In some embodiments of this utility model, such as Figure 7 As shown, the sector plate 4 includes a fixed shaft 41 and a sector portion 42. The fixed shaft 41 is sleeved on the axle housing 1. The sector portion 42 is fan-shaped, with its inner radial end connected to the outer peripheral wall of the fixed shaft 41 and its outer radial end connected to the vehicle body. A notch 421 extending through the sector portion 42 in a first direction is provided at the outer radial end of the sector portion 42. By dividing the sector plate 4 into a fixed shaft 41 and a sector portion 42, it is convenient for the sector plate 4 to be connected to the axle housing 1 and the vehicle body respectively. The fixed shaft 41 facilitates connection to the axle housing 1. The fixed shaft 41 is sleeved on the axle housing 1 and can be fixedly connected to the axle housing 1 by means such as welding. The sector portion 42 is connected to the outer peripheral wall of the fixed shaft 41, facilitating connection to the vehicle. Mounting holes 431 can be provided on the sector portion 42, allowing the sector portion 42 to be connected to the vehicle body via fasteners, which is simple, quick, and detachable.

[0064] The notch 421 on the sector 42 can avoid the drive axle assembly 100 or other parts on the vehicle or provide space for wiring to avoid mutual interference. It can also reserve operating space for the installation of the sector plate 4 and the vehicle body, making it convenient for operators to assemble.

[0065] Preferably, such as Figure 7 As shown, a mounting portion 43 is connected to the radially outer end of the fan-shaped portion 42 for connecting to the vehicle body. The mounting portion 43 is provided with mounting holes 431 for installation, which can reduce the difficulty of installing the fan-shaped plate 4 to the vehicle body. Figure 7In a specific example shown, the sector portion 42 is provided with a notch 421 and two mounting portions 43. Along the circumferential direction of the sector portion 42, the two mounting portions 43 are located on both sides of the notch 421. Each mounting portion 43 is provided with two mounting holes 431, which can enhance the connection stability between the sector plate 4 and the vehicle body, thereby ensuring the connection stability between the axle housing 1 and the vehicle body.

[0066] It should be noted that the radial outer end of the sector 42 may also be provided with a plurality of notches 421 penetrating the sector 42 along the first direction. For example, the number of notches 421 on each sector 42 may be 2, 3, 4, 5, 6, etc.; the number of mounting parts 43 that can be connected to the radial outer end of the sector 42 may be 1, 2, 3, 4, 5, 6, etc.; each mounting part 43 is provided with one or more mounting holes 431 for connecting to the vehicle body. The number of mounting holes 431 may be 1, 2, 3, 4, 5, 6, etc., and this application does not make a specific limitation in this regard.

[0067] In some embodiments of this utility model, such as Figures 1-4 As shown, the drive axle assembly 100 also includes brakes 5. Brakes 5 are connected to both ends of the axle housing 1 along the first direction. Each brake 5 is connected to one of the two wheels and is used to brake each wheel separately. The two brakes 5 control the two wheels respectively, which improves the control precision of wheel braking. When the vehicle needs to brake, both wheels can stop rotating. Compared to braking only one wheel, this avoids the dangerous situation of the braked wheel being suspended in the air, which could lead to brake failure, when braking on uneven road surfaces. This effectively improves the stability of wheel braking and the safety of the vehicle.

[0068] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the brake 5 includes a base plate 51, a brake drum 52, brake shoes 53, and a drive component. The base plate 51 is fitted onto the axle housing 1 and fixedly connected to it. The brake drum 52 is arranged around the axle housing 1 and along a first direction with the base plate 51. The brake drum 52 can rotate relative to the base plate 51, and one end of the brake drum 52 facing away from the base plate 51 is connected to the wheel. The brake shoes 53 are located between the brake drum 52 and the axle housing 1 and are movably connected to the base plate 51. The drive component is located on the base plate 51 and is connected to the vehicle's brake pedal and brake shoes 53 respectively, used to control the contact or separation of the brake shoes 53 from the brake drum 52.

[0069] The brake drum 52 is a rotating component rigidly connected to the wheel. The inner surface of the brake drum 52 is a friction working surface and can be made of cast iron or steel. The brake shoes 53 are arc-shaped metal parts and can be multiple. Multiple brake shoes 53 are movably disposed between the brake drum 52 and the axle housing 1. A brake pad 54 with high friction is provided on the side of the brake shoe 53 closest to the brake drum 52. The driving component can drive the brake shoes 53 to move radially outward toward the axle housing 1 until the brake pad 54 abuts against the brake drum 52. The brake pad 54 generates friction by pressing against the inner wall of the brake drum 52. The braking torque is transmitted to the wheel through the brake drum 52, thereby achieving service braking and decelerating or stopping the vehicle. The structure is simple and the braking control is stable.

[0070] Furthermore, the drive components include a hydraulic pump and a return spring. The hydraulic pump has a piston connected to the brake shoe 53, and the return spring is connected to the brake shoe 53 to drive the brake shoe 53 to move radially inward toward the axle housing 1. When the vehicle's brake pedal is depressed, hydraulic oil flows through the brake lines and enters the hydraulic pump through the brake oil port on the brake caliper 5. The hydraulic oil pressure pushes the piston, thereby driving it to move radially outward toward the axle housing 1 until the brake pad 54 abuts against the brake drum 52, thus achieving service braking. When the vehicle's brake pedal is reset and the brake is released, the return spring pulls the brake shoe 53 back to its original position, preventing the brake shoe 53 from continuously contacting the brake drum 52 and causing drag.

[0071] In some embodiments of this utility model, the brake 5 further includes a cable disposed within the brake drum 52. The cable is connected to the vehicle's parking brake lever and brake shoes 53, respectively, and is used to control the contact or separation of the brake shoes 53 with the brake drum 52. When the vehicle's parking brake lever is pulled to the parking position, the parking brake lever can drive the cable to move, which in turn drives the cable to move radially outward toward the axle housing 1, keeping the brake shoes 53 in contact with the brake drum 52. Under the action of friction, the wheels remain braked, thereby achieving parking braking. The brake 5 itself has the functions of both service braking and parking braking, eliminating the need for additional parking braking components in other locations of the drive axle assembly 100, thus simplifying the structural composition of the drive axle assembly 100 and reducing costs.

[0072] In this application, both brakes 5 connecting the two wheels have parking brake functions, which can improve the stability of the vehicle's parking brake. Compared with a single-wheel parking brake solution, when the vehicle is carrying heavy loads or parking on a steep slope, it can avoid the dangerous situation of low torque and parking brake failure on a single wheel. In addition, when the vehicle is parked on uneven road surfaces, it can avoid the risk of parking brake failure caused by one wheel with parking brake function being suspended in the air. This can effectively improve the stability of the vehicle's parking brake and enhance vehicle safety.

[0073] In some embodiments of this utility model, such as Figures 1-4 As shown, the drive axle assembly 100 also includes wheel hubs 6, which are rotatably fitted onto the axle housing 1. Wheel hubs 6 are connected to both ends of the axle housing 1 along a first direction. The two wheel hubs 6 are respectively connected to two drive shafts 2 and to two wheels. The wheel hubs 6 improve the connection stability between the drive shafts 2 and the wheels, and make it easier to connect the wheels to the wheel hubs 6, as well as facilitate wheel replacement.

[0074] Preferably, such as Figure 3 and Figure 4 As shown, brakes 5 are connected to both ends of the axle housing 1 along the first direction. The two brakes 5 are connected to two wheel hubs 6, and the two wheel hubs 6 are connected to two drive shafts 2 and to two wheels respectively, thus enabling the rotation and braking of the two wheels. The brakes 5 and wheel hubs 6 can be separate parts that are then assembled and connected, or they can be a single piece.

[0075] In some embodiments of this utility model, a bearing 61 is provided between the wheel hub 6 and the axle housing 1. While ensuring a stable connection between the wheel hub 6 and the axle housing 1, the wheel hub 6 can rotate relative to the axle housing 1. The bearing 61 includes an inner bearing 611 and an outer bearing 612, which can further improve the connection stability between the wheel hub 6 and the axle housing 1 and improve the rotational stability of the wheel hub 6.

[0076] The vehicle according to an embodiment of the present invention is described below.

[0077] The vehicle according to an embodiment of the present invention includes: the drive axle assembly 100 described above.

[0078] According to the vehicle embodiment of this utility model, by using the drive axle assembly 100 in the vehicle, the drive component 3 and the two drive shafts 2 are all connected to the vehicle body through the axle housing 1. The two drive shafts 2 pass through the axle housing 1 along a first direction and are respectively connected to the wheels. The drive component 3 is used to drive the two drive shafts 2 to rotate, thereby driving the two wheels to rotate, so as to realize the vehicle movement. The axle housing 1 is a single piece, which can enhance the structural strength of the axle housing 1, enable the axle housing 1 to bear a greater load, thereby improving the load-bearing capacity of the drive axle assembly 100, and thus improving the driving stability of the vehicle.

[0079] In some embodiments of this invention, the vehicle is an electric forklift. Applying the aforementioned drive axle assembly 100 to an electric forklift can improve its load-bearing capacity and driving stability.

[0080] Other components of the drive axle assembly 100 according to embodiments of the present invention, such as the transmission 32 and the motor 31, are known to those skilled in the art and will not be described in detail here.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drive axle assembly, characterized in that, For use in vehicles and including: Axle housing (1), which extends along a first direction and is connected to the vehicle body, wherein the axle housing (1) is a single piece; A drive shaft (2) extends along the first direction and passes through the axle housing (1) along the first direction. There are two drive shafts (2), which are spaced apart along the first direction. The ends of the two drive shafts (2) that are opposite to each other extend out of the axle housing (1) and are adapted to be connected to the wheel. A drive assembly (3) is connected to the bridge housing (1) and is used to drive the two drive shafts (2) to rotate.

2. The drive axle assembly according to claim 1, characterized in that, The bridge housing (1) includes: The main body (11) is connected to the drive assembly (3), and at least a portion of the drive assembly (3) extends into the main body (11) and is connected to the drive shaft (2). Support shaft (12) extends along the first direction. There are two support shafts (12). The two support shafts (12) are connected to the two ends of the main body (11) along the first direction. The two transmission shafts (2) are respectively inserted into the two support shafts (12).

3. The drive axle assembly according to claim 1, characterized in that, The driving component (3) includes: Two motors (31) are provided, and the output shafts of the two motors (31) are respectively connected to the two transmission shafts (2) to drive the two transmission shafts (2) to rotate.

4. The drive axle assembly according to claim 3, characterized in that, The driving component (3) also includes: The transmission (32) has two input ends and two output ends. The two input ends of the transmission (32) are respectively connected to the output shafts of the two motors (31), and the two output ends of the transmission (32) are respectively connected to the two drive shafts (2).

5. The drive axle assembly according to claim 3, characterized in that, The output shafts of the two motors (31) are collinear, and the two motors (31) are symmetrical about the center plane of the drive axle assembly (100) in the first direction.

6. The drive axle assembly according to claim 3, characterized in that, The motor (31) is a disc motor (31).

7. The drive axle assembly according to claim 1, characterized in that, The drive axle assembly (100) also includes: A sector plate (4) is sleeved on the axle housing (1) and is connected to the axle housing (1) and the vehicle body respectively.

8. The drive axle assembly according to claim 7, characterized in that, There are multiple sector plates (4), and the multiple sector plates (4) are spaced apart along the first direction.

9. The drive axle assembly according to claim 7, characterized in that, The sector plate (4) includes: A fixed shaft (41) is sleeved on the bridge housing (1); The fan-shaped part (42) is fan-shaped. The inner radial end of the fan-shaped part (42) is connected to the outer peripheral wall of the fixed shaft (41), and the outer radial end of the fan-shaped part (42) is connected to the vehicle body. The outer radial end of the fan-shaped part (42) is provided with a notch (421) that penetrates the fan-shaped part (42) along the first direction.

10. The drive axle assembly according to claim 1, characterized in that, The drive axle assembly (100) also includes: Brakes (5) are connected to both ends of the axle housing (1) along the first direction. The two brakes (5) are respectively connected to the two wheels and are used to brake the two wheels respectively.

11. The drive axle assembly according to claim 10, characterized in that, The brake (5) includes: A base plate (51) is sleeved on the bridge shell (1) and fixedly connected to the bridge shell (1); Brake drum (52) is arranged around the axle housing (1) and along the first direction with the base plate (51). The brake drum (52) can rotate relative to the base plate (51). The end of the brake drum (52) away from the base plate (51) is connected to the wheel. Brake shoe (53), the brake shoe (53) is disposed between the brake drum (52) and the axle housing (1), and the brake shoe (53) is movably connected to the base plate (51); A drive unit is provided on the base plate (51). The drive unit is connected to the brake pedal and the brake shoe (53) of the vehicle respectively, and is used to control the brake shoe (53) to abut or separate from the brake drum (52).

12. The drive axle assembly according to claim 11, characterized in that, The brake (5) also includes: The cable is located inside the brake drum (52) and is connected to the parking brake lever and the brake shoe (53) of the vehicle, respectively, for controlling the brake shoe (53) to abut or separate from the brake drum (52).

13. The drive axle assembly according to claim 1, characterized in that, The drive axle assembly (100) also includes: A hub (6) is rotatably fitted onto the axle housing (1). The axle housing (1) is connected to the hub (6) at both ends along the first direction. The two hubs (6) are respectively connected to the two drive shafts (2) and to the two wheels.

14. The drive axle assembly according to claim 13, characterized in that, A bearing (61) is provided between the wheel hub (6) and the axle housing (1).

15. A vehicle, characterized in that, Includes the drive axle assembly (100) according to any one of claims 1-14.

16. The vehicle according to claim 15, characterized in that, The vehicle in question is an electric forklift.

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