Electrically-controlled hydrostatic high-speed-ratio high-torque wet brake drive axle

Abstract

The invention discloses an electrically-controlled hydrostatic high-speed-ratio high-torque wet brake drive axle which comprises an axle body, hub belt wet brake assemblies are arranged at the left end and the right end of the axle body, the axle body and the hub belt wet brake assemblies are integrally cast, and a multi-stage speed reducer assembly is arranged in the middle section of the top of the axle body. Half shafts are arranged on the two sides, facing the hub belt wet brake assembly, in the axle body, the multi-stage speed reducer assembly comprises a three-stage speed reducer shaft, a second-stage speed reducer shaft is arranged at the top of the three-stage speed reducer shaft, and a first-stage speed reducer shaft is arranged at the top of the second-stage speed reducer shaft; according to the device, the axle body and the hub belt wet brake assembly are integrally cast, the structural design is simple and compact, the casting difficulty is greatly reduced, meanwhile, the machining cost is reduced due to the reduction of machining die investment, a floating oil seal structure is omitted, potential quality hazards caused by oil leakage are greatly reduced, and the service life of the device is prolonged. And the size is small while the mechanical traction performance is kept, so that the power density is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wet brake drive axles, and in particular to an electronically controlled hydrostatic type large speed ratio and high torque wet brake drive axle. Background Art

[0002] The drive axle, as the end of the power transmission system of vehicles and machinery, can transmit the torque from the motor to the drive wheels through the main reducer, differential, half-shafts, etc., to achieve the effect of reducing the speed and increasing the torque. It can also achieve direction change and differential turning through the reducer bevel gears on the drive axle, and can also achieve load-bearing and force transmission through the drive axle housing and wheels. The wet brake drive axle is one of them. Because of its good sealing and reliability, it is widely used in application scenarios that require high reliability and low maintenance costs.

[0003] At present, in order to improve the driving force of the equipment, the deceleration capacity of the drive axle must be improved so that the torque transmitted by the engine can be increased by reducing the speed and improving the mechanical traction performance. When designing forklifts or special-purpose vehicle electric equipment, manufacturers generally increase the driving force of the equipment by increasing the size of the drive axle. This results in the size of the vehicle having to increase, thereby increasing the size and weight of the vehicle, reducing the power density of the vehicle, and increasing the energy consumption of the vehicle. Summary of the invention

[0004] The object of the present invention is to provide an electronically controlled hydrostatic large speed ratio high torque wet brake drive axle to solve the problems raised in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An electronically controlled hydrostatic type high-speed ratio high-torque wet brake drive axle comprises a bridge body, a wheel hub with wet brake assemblies are arranged at both left and right ends of the bridge body, the bridge body and the wheel hub with wet brake assembly are integrally cast, a multi-stage reducer assembly is arranged in the middle section of the bridge body, and half shafts are arranged on both sides of the bridge body facing the wheel hub with wet brake assembly;

[0007] The multi-stage reducer assembly includes a three-stage reducer shaft, a second-stage reducer shaft is arranged on the top of the three-stage reducer shaft, and a first-stage reducer shaft is arranged on the top of the second-stage reducer shaft.

[0008] Preferably, the wheel hub with wet brake assembly includes an intermediate intermediate wheel sleeved on the half shaft, a piston seal and a sealing ring are arranged on the inner side of the wheel hub with wet brake assembly, a return spring assembly facing outward is arranged on the piston seal, a friction plate group is arranged on the outer side of the piston seal, a friction plate seat is arranged on the outer side of the friction plate group, a wheel hub is arranged on the friction plate seat sleeve, and a first bearing, a second bearing and a cassette oil seal assembly are arranged inside the wheel hub.

[0009] Preferably, the friction plate seat is fixedly connected to the end of the bridge body by a plurality of first fastening bolts.

[0010] Preferably, the end of the half shaft is fixedly connected to the outer end surface of the wheel hub by a second fastening bolt.

[0011] Preferably, a plurality of return spring assemblies are provided, and the return spring assembly comprises a spring and a T-shaped shaft, and the spring is sleeved on the T-shaped shaft.

[0012] Preferably, the friction plate group is sleeved on the middle intermediate wheel, and the friction plate group includes a plurality of dynamic friction plates and a plurality of static friction plates.

[0013] Preferably, the first bearing, the second bearing and the cassette oil seal assembly are all assembled on the friction plate seat, the dynamic friction plate is connected to the intermediate intermediate gear, and spline teeth are also provided on the half shaft at the intermediate intermediate gear, and the intermediate intermediate gear is connected to the half shaft through the spline teeth.

[0014] Preferably, the intermediate wheel is located inside the wheel hub with wet brake assembly, and the friction plate seat is made of alloy structural steel.

[0015] Preferably, the number of the dynamic friction plates is three, and the number of the static friction plates is four.

[0016] Beneficial effects of the present invention:

[0017] 1. This device uses the bridge body and wheel hub with wet brake assembly to be cast in one piece. The structural design is simple, which greatly reduces the difficulty of machining and casting. At the same time, the reduction in processing mold investment leads to a reduction in processing costs, and reduces the floating oil seal structure. While reducing costs, it also greatly reduces quality risks caused by oil leakage.

[0018] 2. The device utilizes two half shafts which are rotatably mounted at both ends of the multi-stage reducer assembly. The structure is compact, so that the device has a small size while maintaining mechanical traction performance, thereby improving power density and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 3 yes Figure 1 A magnified schematic diagram of center A.

[0023] In the figure: 1, bridge body; 2, half shaft; 3, wheel hub with wet brake assembly; 301, piston seal; 302, friction plate group; 303, intermediate intermediate wheel; 304, first fastening bolt; 305, friction plate seat; 306, wheel hub; 307, second fastening bolt; 308, first bearing; 309, second bearing; 310, cassette oil seal assembly; 311, return spring assembly; 4, multi-stage reducer assembly; 401, third-stage reducer shaft; 402, second-stage reducer shaft; 403, first-stage reducer shaft. 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Reference Figure 1-Figure 3 As shown, the present invention is an electronically controlled hydrostatic type large speed ratio high torque wet brake drive axle, comprising a bridge body 1, with wheel hub wet brake assemblies 3 being provided at both left and right ends of the bridge body 1, the bridge body 1 and the wheel hub wet brake assembly 3 being integrally cast, a multi-stage reducer assembly 4 being provided at the middle section of the bridge body 1, and half shafts 2 being provided on both sides of the interior of the bridge body 1 facing the wheel hub wet brake assembly 3.

[0026] Among them, it should be supplemented that the wheel hub with wet brake assembly 3 includes a wet brake base, and the bridge body 1 and the wheel hub with wet brake assembly 3 are cast as one piece, that is, the bridge body 1 and the wet brake base are cast as one piece. Through such an arrangement, the structural design of the device is simple, the machining difficulty is greatly reduced, and the casting difficulty is also greatly reduced. At the same time, the reduction in processing mold investment leads to a reduction in processing costs, and the floating oil seal structure is reduced. While reducing costs, the quality risks caused by oil leakage are greatly reduced.

[0027] Furthermore, the multi-stage reducer assembly 4 includes a three-stage reducer shaft 401 , a two-stage reducer shaft 402 is arranged on the top of the three-stage reducer shaft 401 , and a first-stage reducer shaft 403 is arranged on the top of the two-stage reducer shaft 402 .

[0028] It should be noted that the two half shafts 2 are rotatably mounted at both ends of the multi-stage reducer assembly 4, respectively, and the structure is compact, so that the device has a small size while maintaining mechanical traction performance, thereby improving power density and reducing energy consumption.

[0029] Reference Figure 3As shown, in an optional embodiment, the wheel hub wet brake assembly 3 includes an intermediate intermediate wheel 303 sleeved on the half shaft 2, a piston seal 301 and a sealing ring are arranged on the inner side of the wheel hub wet brake assembly 3, a return spring assembly 311 facing outward is arranged on the piston seal 301, a friction plate group 302 is arranged on the outer side of the piston seal 301, a friction plate seat 305 is arranged on the outer side of the friction plate group 302, the friction plate seat 305 is sleeved with a wheel hub 306, and a first bearing 308, a second bearing 309 and a cassette oil seal assembly 310 are arranged inside the wheel hub 306.

[0030] Among them, it should be supplemented that the friction plate holder 305 is fixedly connected to the end of the bridge body 1 by a plurality of first fastening bolts 304, and the end of the half-shaft 2 is fixedly connected to the outer end surface of the wheel hub 306 by a second fastening bolt 307, which is used to transmit the torque output by the multi-stage reducer assembly 4 and then drive the tire installed on the wheel hub 306 to rotate. When braking is required, the friction torque is transmitted from the intermediate wheel 303 and the half-shaft 2 to the wheel hub 306, thereby providing a ground braking torque.

[0031] Reference Figure 3 As shown, there are several return spring assemblies 311, which include a spring and a T-shaped shaft, the spring is sleeved on the T-shaped shaft, the friction plate group 302 is sleeved on the intermediate intermediate wheel 303, the friction plate group 302 includes a plurality of dynamic friction plates and a plurality of static friction plates, in an optional embodiment, the dynamic friction plates are arranged in three pieces, the static friction plates are arranged in four pieces, the first bearing 308, the second bearing 309 and the cassette oil seal assembly 310 are all assembled on the friction plate seat 305, the dynamic friction plate is connected to the intermediate intermediate wheel 303, and spline teeth are also arranged on the half shaft 2 at the intermediate intermediate wheel 303, and the intermediate intermediate wheel 303 is connected to the half shaft 2 through the spline teeth.

[0032] The intermediate wheel 303 is located inside the hub wet brake assembly 3, and the friction plate seat 305 is made of alloy structural steel to improve its durability.

[0033] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An electronically controlled hydrostatic type high speed ratio high torque wet brake drive axle, characterized in that: The invention comprises a bridge body (1), wherein a wheel hub with wet brake assembly (3) is arranged at both left and right ends of the bridge body (1), the bridge body (1) and the wheel hub with wet brake assembly (3) are integrally cast, a multi-stage reducer assembly (4) is arranged in the middle section of the bridge body (1), and half shafts (2) are arranged on both sides of the interior of the bridge body (1) facing the wheel hub with wet brake assembly (3); The multi-stage reducer assembly (4) comprises a three-stage reducer shaft (401), a two-stage reducer shaft (402) is arranged on the top of the three-stage reducer shaft (401), and a first-stage reducer shaft (403) is arranged on the top of the two-stage reducer shaft (402).

2. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 1, characterized in that: The wheel hub with wet brake assembly (3) comprises an intermediate intermediate wheel (303) sleeved on the half shaft (2); a piston seal (301) and a sealing ring are arranged on the inner side of the wheel hub with wet brake assembly (3); a return spring assembly (311) facing outward is arranged on the piston seal (301); a friction plate group (302) is arranged on the outer side of the piston seal (301); a friction plate seat (305) is arranged on the outer side of the friction plate group (302); a wheel hub (306) is sleeved on the friction plate seat (305); a first bearing (308), a second bearing (309) and a cassette oil seal assembly (310) are arranged inside the wheel hub (306).

3. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 2, characterized in that: The friction plate seat (305) is fixedly connected to the end of the bridge body (1) via a plurality of first fastening bolts (304).

4. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 3, characterized in that: The end of the half shaft (2) is fixedly connected to the outer end surface of the wheel hub (306) via a second fastening bolt (307).

5. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 4, characterized in that: A plurality of return spring assemblies (311) are provided, and the return spring assembly (311) comprises a spring and a T-shaped shaft, and the spring is sleeved on the T-shaped shaft.

6. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 5, characterized in that: The friction plate group (302) is sleeved on the intermediate wheel (303), and the friction plate group (302) includes a plurality of dynamic friction plates and a plurality of static friction plates.

7. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 6, characterized in that: The first bearing (308), the second bearing (309) and the box oil seal assembly (310) are all assembled on the friction plate seat (305), the dynamic friction plate is connected to the intermediate intermediate wheel (303), and the half shaft (2) is also provided with spline teeth at the intermediate intermediate wheel (303), and the intermediate intermediate wheel (303) is connected to the half shaft (2) through the spline teeth.

8. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 7, characterized in that: The intermediate wheel (303) is located inside the wheel hub wet brake assembly (3), and the friction plate seat (305) is made of alloy structural steel.

9. The electronically controlled hydrostatic high-speed ratio high-torque wet brake drive axle according to claim 7, characterized in that: The number of the dynamic friction plates is three, and the number of the static friction plates is four.

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