Motor integrated special-shaped electric drive unit

Abstract

The invention discloses a motor integrated type special-shaped electric drive unit, and relates to the technical field of vehicle drive systems, the motor integrated type special-shaped electric drive unit comprises a motor assembly, the motor assembly is of a single-head output or double-head output structure, when the motor assembly is of a single-head output structure, the output end of the motor assembly is provided with a special-shaped drive unit to form a double-drive assembly, and when the motor assembly is of a double-head output structure, the special-shaped drive unit is driven by the motor assembly. When the motor assembly is in a double-end output mode, the two output ends are each provided with a special-shaped driving unit to form a four-wheel-drive assembly, and the four-wheel-drive assembly or the double-wheel-drive assembly is independently installed at the lower end of the vehicle body bottom plate or the four-wheel-drive assembly and the double-wheel-drive assembly are jointly installed at the lower end of the vehicle body bottom plate in a combined mode. The design thought of overall layout of a driving system is adopted, ultrahigh bearing safety is guaranteed while the sealing and bearing problems of the drive axle are fundamentally combined, and the overall sealing performance and rigidity are guaranteed by adopting a large number of plane sealing structures and a multi-channel box type rotary sealing system.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle drive systems, and in particular to a motor-integrated special-shaped electric drive unit. Background Art

[0002] Off-highway road machinery and high-end agricultural machinery have to deal with environments such as high mud and water, high impact, high load, and ultra-high output torque, which places more stringent requirements on the drive axle.

[0003] The drive axle is required to have the following characteristics: 1. Ultra-high strength integrity to ensure the load-bearing reliability of the drive axle;

[0004] 2. Ultra-high output torque ensures the traction and wheel output of the vehicle, and guarantees the torque requirements of the vehicle and the ability of the vehicle to escape from muddy and watery environments;

[0005] 3. The overall sealing reliability ensures the working reliability of the drive axle in muddy and water environments or even in muddy and water immersed environments;

[0006] 4. Ultra-high reliability and maintenance-free to ensure the vehicle's long-term working stability in the field.

[0007] Based on the above requirements and the current electrification background, we developed a maintenance-free, ultra-high-strength special-shaped drive system to meet the high-end needs of customers. Summary of the invention

[0008] The purpose of the present invention is to provide a motor-integrated special-shaped electric drive unit to solve the above-mentioned technical problems.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A motor-integrated special-shaped electric drive unit comprises a motor assembly, wherein the motor assembly is a single-head output or a dual-head output structure. When the motor assembly is a single-head output, a special-shaped drive unit is installed at the output end of the motor assembly to form a dual-head output assembly. When the motor assembly is a dual-head output, special-shaped drive units are installed at both output ends to form a four-wheel drive assembly. The four-wheel drive assembly or the dual-wheel drive assembly is independently installed at the lower end of a vehicle body floor, or the four-wheel drive assembly and the dual-wheel drive assembly are installed together in combination at the lower end of the vehicle body floor.

[0011] As a further solution of the present invention: when the four-wheel drive assembly and the dual-wheel drive assembly are installed together at the lower end of the vehicle body floor, the dual-wheel drive assembly is symmetrically distributed at the lower end of the vehicle body floor or symmetrically distributed with the four-wheel drive assembly as the center.

[0012] As a further solution of the present invention: the motor assembly includes a motor housing, two groups of motor stators are arranged inside the motor housing, and a motor rotor assembly is rotatably arranged inside the motor stator.

[0013] As a further solution of the present invention: the motor rotor assembly includes motor end covers fixedly mounted at both ends of the motor housing and a rotor body rotatably disposed in the motor housing, a motor output shaft is fixedly disposed in the rotor body, the motor output shaft is integral or two-segmented, a wet brake is disposed between the two sets of rotor bodies, and brake oil seals are disposed at both ends of the wet brake.

[0014] As a further solution of the present invention: the special-shaped drive unit includes a reduction main housing fixedly connected to the output end of the motor assembly, the reduction main housing is fixedly installed on the output end of the motor assembly by motor bolts, a reduction gear assembly is arranged in the reduction main housing, one end of the reduction main housing away from the motor assembly is fixedly connected to a reduction sub-housing by casing bolts, and the output ends of both sides of the reduction gear assembly are fixedly connected to hub mechanisms; a bottom plate support is fixedly arranged on the upper end of the reduction main housing, a bottom plate connecting shaft is fixedly arranged on the bottom plate support, and a side connecting seat connected to the bottom plate connecting shaft is fixedly arranged at the lower end of the vehicle body bottom plate.

[0015] As a further solution of the present invention: the wheel hub mechanism includes a main wheel hub assembly and / or a secondary wheel hub assembly, and the main wheel hub assembly and the secondary wheel hub assembly are independently installed on the reduction gear assembly or are installed together on the reduction gear assembly.

[0016] As a further solution of the present invention: the main wheel hub assembly is fixedly mounted on the main half-shaft sleeve by main sleeve bolts, the main half-shaft sleeve is fixedly mounted on the reduction sub-box, the main wheel hub assembly is transmission connected to the output end of the reduction gear assembly through a driving half shaft, and the driving half shaft is fixedly mounted on the main wheel hub assembly by half shaft bolts.

[0017] As a further solution of the present invention: a secondary half-shaft sleeve is fixedly connected to the secondary wheel hub assembly, and the secondary half-shaft sleeve is fixedly installed on the reduction main housing by a secondary sleeve bolt, the secondary half-shaft sleeve is coaxially arranged with the main half-shaft sleeve, and the secondary wheel hub assembly is transmission connected to the output end of the reduction gear assembly through a driving half shaft.

[0018] As a further solution of the present invention: the reduction gear assembly includes a driving shaft connected to the output shaft of the motor assembly, a driving gear is fixedly provided on the driving shaft, and gear sets meshing and transmission connected with the driving gear are symmetrically provided on both sides of the driving gear.

[0019] As a further solution of the present invention: the gear set includes an offset reduction gear 1 rotatably installed in the reduction main housing, the offset reduction gear 1 is meshed with the driving gear, a planetary reducer 1 is fixedly installed on the offset reduction gear 1, a driven gear is transmission-connected to the planetary reducer 1, a transmission gear is meshed with the driven gear, the transmission gear is rotatably connected in the reduction main housing, an offset reduction gear 2 is meshed with the transmission gear, a planetary reducer 2 is highly arranged on the offset reduction gear 2, and a drive shaft sleeve is fixedly connected to the output end of the planetary reducer 2.

[0020] Beneficial effects of the present invention:

[0021] (1) The overall layout of the drive system is adopted, which fundamentally combines the sealing and load-bearing issues of the drive axle while ensuring ultra-high load-bearing safety.

[0022] (2) Due to the overall layout concept, the patent of the present invention adopts a large number of planar sealing structures and a multi-channel box-type rotary sealing system to ensure the overall sealing and rigidity.

[0023] (3) The redundant torque design with an overall layout is adopted to transmit the motor output torque to the wheel end through a multi-stage and multi-section reducer, which ensures the redundant safety of the gears in the system and the reliability of the gears in a long-term high-impact environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the installation structure of a four-wheel drive component of a motor-integrated special-shaped electric drive unit of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the coordinated use of a four-wheel drive component and a dual-wheel drive component of a motor-integrated special-shaped electric drive unit of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of a dual-drive component of a motor-integrated special-shaped electric drive unit of the present invention;

[0028] Figure 4 It is a schematic diagram of the exploded structure of a motor-integrated special-shaped electric drive unit dual-drive component of the present invention;

[0029] Figure 5 It is a structural schematic diagram of a motor-integrated special-shaped electric drive unit reduction gear assembly of the present invention.

[0030] In the figure: 1, half-shaft bolt; 2, driving half-shaft; 3, main wheel hub assembly; 4, main sleeve bolt; 5, main half-shaft sleeve; 6, casing bolt; 7, reduction sub-box; 8, reduction gear assembly; 81, driving shaft; 82, driving gear; 83, offset reduction gear 1; 84, planetary reducer 1; 85, driven gear; 86, transmission gear; 87, offset reduction gear 2; 88, planetary reducer 2; 89, driving shaft sleeve; 9, reduction main box; 10, Auxiliary half-shaft sleeve; 11. Auxiliary sleeve bolt; 12. Auxiliary wheel hub assembly; 13. Motor bolt; 14. Motor rotor assembly; 141. Motor end cover; 142. Motor output shaft; 143. Rotor body; 144. Brake oil seal; 145. Wet brake; 15. Motor stator; 16. Motor housing; 17. Bottom plate support; 18. Bottom plate connecting shaft; 100. Vehicle body bottom plate; 101. Side connecting seat; 200. Four-wheel drive assembly; 300. Dual-wheel drive assembly. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention / invention to clearly and completely describe the technical solutions in the embodiments of the present invention / invention. Obviously, the described embodiments are only part of the embodiments of the present invention / invention, not all of them. Based on the embodiments of the present invention / invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention / invention.

[0032] In the description of the present invention / invention, it should be understood that the terms "upper", "lower", "left", "right", etc., indicating directions or positional relationships, are based on the directions 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 device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, 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, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figure 1-Figure 5 As shown, the present invention is a motor-integrated special-shaped electric drive unit, including a motor assembly, wherein the motor assembly is a single-head output or a dual-head output structure. When the motor assembly is a single-head output, a special-shaped drive unit is installed at the output end of the motor assembly to form a dual-head output assembly 300. When the motor assembly is a dual-head output, special-shaped drive units are installed at both output ends to form a four-wheel drive assembly 200. The four-wheel drive assembly 200 or the dual-wheel drive assembly 300 is independently installed at the lower end of the vehicle body floor 100, or the four-wheel drive assembly 200 and the dual-wheel drive assembly 300 are combined and installed at the lower end of the vehicle body floor 100.

[0035] It should be noted that the design concept of the overall layout of the four-wheel drive system fundamentally combines the problems of drive axle sealing and load-bearing while ensuring ultra-high load-bearing safety.

[0036] Due to the idea of ​​overall layout, the patent of the present invention adopts a large number of planar sealing structures and multi-channel box-type rotating sealing systems to ensure the overall sealing and rigidity.

[0037] The redundant torque design with overall layout is adopted to transmit the motor output torque to the wheel end through a multi-stage and multi-section reducer, which ensures the redundant safety of the gears in the system and the reliability of the gears in a long-term high-impact environment.

[0038] In an optional embodiment, when the four-wheel drive assembly 200 and the dual-wheel drive assembly 300 are installed together at the lower end of the vehicle body floor 100, the dual-wheel drive assembly 300 is symmetrically distributed at the lower end of the vehicle body floor 100 or symmetrically distributed with the four-wheel drive assembly 200 as the center.

[0039] It should be noted that this design structure is used to solve special engineering machinery: road, mining, special-shaped agricultural machinery and other engineering machinery with long wheelbase and special requirements for passability. The single-sided power assembly is conducive to the layout of the whole machine with extra-long wheelbase and crawler configuration options.

[0040] Further, such as Figure 2 In the installation structure shown, the dual-drive assembly 300 arranged on one side can be adjusted by the motor speed, so that the speed of different wheels can be controlled to complete the turning or turning on the spot of the vehicle body.

[0041] In an optional embodiment, the motor assembly includes a motor housing 16 , two groups of motor stators 15 are disposed inside the motor housing 16 , and a motor rotor assembly 14 is rotatably disposed inside the motor stator 15 .

[0042] It should be noted that the motor rotor assembly 14, the motor stator 15, and the motor housing 15 constitute a motor assembly. The motor structure includes two sets of independent stators and rotors, which can be controlled individually or in conjunction with each other to maximize energy consumption ratio and power recovery efficiency.

[0043] In an optional embodiment, the motor rotor assembly 14 includes a motor end cover 141 fixedly mounted at both ends of a motor housing 16 and a rotor body 143 rotatably disposed in the motor housing 16, a motor output shaft 142 is fixedly disposed in the rotor body 143, and the motor output shaft 142 is integral or two-segmented, a wet brake 145 is disposed between the two sets of rotor bodies 143, and brake oil seals 144 are disposed at both ends of the wet brake 145.

[0044] It should be noted that according to the number of stators and rotors and the relative positions of the stators and rotors, there are four categories: single stator and rotor structure, double stator intermediate rotor structure, double rotor intermediate stator structure and multi-disc structure. The present invention can start the number of stators and rotors according to the load. The bilateral structure of the intermediate stator or rotor can overcome the problem of unilateral magnetic pull.

[0045] In an optional embodiment, the special-shaped drive unit includes a reduction main housing 9 fixedly connected to the output end of the motor assembly, the reduction main housing 9 is fixedly installed at the output end of the motor assembly by a motor bolt 13, a reduction gear assembly 8 is arranged in the reduction main housing 9, the end of the reduction main housing 9 away from the motor assembly is fixedly connected to the reduction sub-housing 7 by a casing bolt 6, and the output ends of the reduction gear assembly 8 on both sides are fixedly connected to the hub mechanism; a bottom plate support 17 is fixedly provided at the upper end of the reduction main housing 9, a bottom plate connecting shaft 18 is fixedly provided on the bottom plate support 17, and a side connecting seat 101 connected to the bottom plate connecting shaft 18 is fixedly provided at the lower end of the vehicle body bottom plate 100.

[0046] It should be noted that the reduction gear assembly 8 is installed and protected by providing the reduction main housing 9 and the reduction sub-housing 7 to ensure stable transmission of the reduction gear assembly 8, and the stable installation and connection of the vehicle body bottom plate 100 is achieved by providing the bottom plate support 17 and the bottom plate connecting shaft 18.

[0047] In an optional embodiment, the wheel hub mechanism includes a main wheel hub assembly 3 and / or a secondary wheel hub assembly 12, and the main wheel hub assembly 3 and the secondary wheel hub assembly 12 are independently mounted on the reduction gear assembly 8 or are jointly mounted on the reduction gear assembly 8.

[0048] It should be noted that the drive unit can realize unilateral single-wheel drive or unilateral dual-wheel drive, and is provided with a secondary half-axle sleeve 10, a secondary sleeve bolt 11 and a secondary wheel hub assembly 12, which can realize modular switching between single wheel and dual wheels.

[0049] In an optional embodiment, the main wheel hub assembly 3 is fixedly mounted on the main half-shaft sleeve 5 by a main sleeve bolt 4, the main half-shaft sleeve 5 is fixedly mounted on the reduction sub-box 7, the main wheel hub assembly 3 is transmission connected to the output end of the reduction gear assembly 8 through the driving half shaft 2, and the driving half shaft 2 is fixedly mounted on the main wheel hub assembly 3 by the half shaft bolt 1.

[0050] It should be noted that by providing the main half-shaft sleeve 5, the main hub assembly 3 can be stably installed, the overall connection strength of the wheel connection is improved, and the bearing strength of the wheel is improved.

[0051] In an optional embodiment, a secondary half-shaft sleeve 10 is fixedly connected to the secondary wheel hub assembly 12, and the secondary half-shaft sleeve 10 is fixedly installed on the reduction main housing 9 by a secondary sleeve bolt 11. The secondary half-shaft sleeve 10 is coaxially arranged with the main half-shaft sleeve 5, and the secondary wheel hub assembly 12 is transmission connected to the output end of the reduction gear assembly 8 through the driving half shaft 2.

[0052] It should be noted that, by providing the secondary half-shaft sleeve 10, the main hub assembly 3 can be stably installed, the overall connection strength of the wheel connection is improved, and the bearing strength of the wheel is improved.

[0053] In an optional embodiment, the reduction gear assembly 8 includes a driving shaft 81 connected to the output shaft of the motor assembly, a driving gear 82 is fixedly provided on the driving shaft 81, and gear sets meshingly connected to the driving gear 82 are symmetrically provided on both sides of the driving gear 82.

[0054] The gear set includes an offset reduction gear 83 rotatably mounted in the reduction main housing 9, the offset reduction gear 83 is meshedly connected with a driving gear 82, a planetary reducer 84 is fixedly mounted on the offset reduction gear 83, a driven gear 85 is transmission-connected to the planetary reducer 84, a transmission gear 86 is meshedly connected to the driven gear 85, the transmission gear 86 is rotatably connected in the reduction main housing 9, an offset reduction gear 87 is meshedly connected to the transmission gear 86, a planetary reducer 88 is highly arranged on the offset reduction gear 87, and a driving shaft sleeve 89 is fixedly connected to the output end of the planetary reducer 88.

[0055] It should be noted that the reduction gear assembly 8 is provided with two sets of planetary reducers and multi-stage offset gear reducers for linkage reduction, which can ensure the customer's ultra-high output torque while meeting the customer's modular switching of multiple reducers under multiple working conditions. At the same time, due to the surplus space of the overall layout, it can also ensure the safety of the gears under high-torque and high-impact conditions.

[0056] The working principle of the present invention is as follows: the motor assembly consisting of a motor rotor assembly 14, a motor stator 15, and a motor housing 15 is fastened on the reduction main housing 9 through motor bolts 13 to form a high-strength bearing body. The motor assembly transmits the rotational speed and torque to the reduction gear assembly 8 through the motor rotor driving the wet brake 145, and after multi-stage deceleration and torque increase, the terminal rotational speed and torque are transmitted to the main wheel hub assembly 3 and the secondary wheel hub assembly 12 through the driving half shaft 2 to realize the driving of the entire vehicle or equipment assembly.

[0057] 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. A motor-integrated special-shaped electric drive unit, characterized in that: The invention comprises a motor assembly, wherein the motor assembly is a single-head output or a dual-head output structure. When the motor assembly is a single-head output, a special-shaped drive unit is installed at the output end of the motor assembly to form a dual-drive assembly (300). When the motor assembly is a dual-head output, special-shaped drive units are installed at both output ends to form a four-wheel drive assembly (200). The four-wheel drive assembly (200) or the dual-drive assembly (300) is independently installed at the lower end of a vehicle body bottom plate (100), or the four-wheel drive assembly (200) and the dual-drive assembly (300) are installed together in combination at the lower end of the vehicle body bottom plate (100).

2. The motor-integrated special-shaped electric drive unit according to claim 1, characterized in that: When the four-wheel drive assembly (200) and the dual-wheel drive assembly (300) are installed together on the lower end of the vehicle body bottom plate (100), the dual-wheel drive assembly (300) is symmetrically distributed on the lower end of the vehicle body bottom plate (100) or symmetrically distributed with the four-wheel drive assembly (200) as the center.

3. The motor-integrated special-shaped electric drive unit according to claim 1, characterized in that: The motor assembly comprises a motor housing (16), two groups of motor stators (15) are arranged inside the motor housing (16), and a motor rotor assembly (14) is rotatably arranged inside the motor stator (15).

4. The motor-integrated special-shaped electric drive unit according to claim 3, characterized in that: The motor rotor assembly (14) comprises a motor end cover (141) fixedly mounted on both ends of a motor housing (16) and a rotor body (143) rotatably arranged in the motor housing (16); a motor output shaft (142) is fixedly arranged in the rotor body (143); the motor output shaft (142) is integral or divided into two sections; a wet brake (145) is arranged between two sets of rotor bodies (143); and brake oil seals (144) are arranged at both ends of the wet brake (145).

5. The motor-integrated special-shaped electric drive unit according to claim 1, characterized in that: The special-shaped drive unit comprises a reduction main housing (9) fixedly connected to the output end of the motor assembly, the reduction main housing (9) being fixedly installed at the output end of the motor assembly via motor bolts (13), a reduction gear assembly (8) being arranged in the reduction main housing (9), one end of the reduction main housing (9) away from the motor assembly being fixedly connected to a reduction sub-housing (7) via housing bolts (6), and the output ends of the reduction gear assembly (8) on both sides being fixedly connected to wheel hub mechanisms; a bottom plate support (17) being fixedly arranged at the upper end of the reduction main housing (9), a bottom plate connecting shaft (18) being fixedly arranged on the bottom plate support (17), and a side connecting seat (101) connected to the bottom plate connecting shaft (18) being fixedly arranged at the lower end of the vehicle body bottom plate (100).

6. The motor-integrated special-shaped electric drive unit according to claim 5, characterized in that: The wheel hub mechanism comprises a main wheel hub assembly (3) and / or a secondary wheel hub assembly (12); the main wheel hub assembly (3) and the secondary wheel hub assembly (12) are independently mounted on a reduction gear assembly (8) or are jointly mounted on the reduction gear assembly (8).

7. The motor-integrated special-shaped electric drive unit according to claim 6, characterized in that: The main wheel hub assembly (3) is fixedly mounted on the main half-shaft sleeve (5) via a main sleeve bolt (4), the main half-shaft sleeve (5) is fixedly mounted on the reduction sub-box (7), the main wheel hub assembly (3) is transmission-connected to the output end of the reduction gear assembly (8) via a driving half-shaft (2), and the driving half-shaft (2) is fixedly mounted on the main wheel hub assembly (3) via a half-shaft bolt (1).

8. The motor-integrated special-shaped electric drive unit according to claim 7, characterized in that: The secondary wheel hub assembly (12) is fixedly connected with a secondary half-shaft sleeve (10), and the secondary half-shaft sleeve (10) is fixedly mounted on the reduction main housing (9) via a secondary sleeve bolt (11). The secondary half-shaft sleeve (10) is coaxially arranged with the main half-shaft sleeve (5), and the secondary wheel hub assembly (12) is transmission-connected to the output end of the reduction gear assembly (8) via a driving half-shaft (2).

9. The motor-integrated special-shaped electric drive unit according to claim 1, characterized in that: The reduction gear assembly (8) comprises a driving shaft (81) connected to the output shaft of the motor assembly, a driving gear (82) is fixedly arranged on the driving shaft (81), and a gear set meshing and transmission-connected with the driving gear (82) is symmetrically arranged on both sides of the driving gear (82).

10. The motor-integrated special-shaped electric drive unit according to claim 9, characterized in that: The gear set comprises an offset reduction gear 1 (83) rotatably mounted in a reduction main housing (9), the offset reduction gear 1 (83) being meshedly connected with a driving gear (82), a planetary reducer 1 (84) being fixedly mounted on the offset reduction gear 1 (83), a driven gear (85) being transmission-connected to the planetary reducer 1 (84), a transmission gear (86) being meshedly connected to the driven gear (85), the transmission gear (86) being rotatably connected in the reduction main housing (9), an offset reduction gear 2 (87) being meshedly connected to the transmission gear (86), a planetary reducer 2 (88) being arranged at a height above the offset reduction gear 2 (87), and a driving shaft sleeve (89) being fixedly connected to the output end of the planetary reducer 2 (88).

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