Integrated new energy industrial vehicle electric drive system

Abstract

The invention discloses an integrated new energy industrial vehicle electric drive system which comprises a control unit, a traction motor and an operation motor, the traction motor and the operation motor are horizontally arranged side by side, the control unit is located above the traction motor and the operation motor, and connecting pieces are arranged among the control unit, the traction motor and the operation motor; the connecting piece comprises two arc-shaped plates which are oppositely arranged, the tops of the two arc-shaped plates are fixedly connected with a hollow plate through vertical plates, the outer sides of the two arc-shaped plates are fixedly attached to the traction motor and the operation motor respectively, and the control unit is fixedly installed at the top of the hollow plate. The control unit, the traction motor and the operation motor are designed in a centralized mode, the efficiency of the whole vehicle is improved, the overall size is reduced, and meanwhile the problems of centralized heat dissipation, electromagnetic interference and the like of the centralized design are solved by arranging the connecting pieces.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle electric drive systems, and particularly relates to an integrated new energy industrial vehicle electric drive system. Background Art

[0002] With the transformation of the global energy structure and the increasingly strict environmental protection regulations, new energy technologies have been widely applied. Especially in the industrial field, electric drive systems have gradually become one of the mainstream technologies to replace traditional internal combustion engine drive systems. As equipment widely used in industrial production, warehousing, logistics and other scenarios, the demand for new energy industrial vehicles is increasing continuously, and the market has higher and higher requirements for their performance and environmental protection.

[0003] Among them, in the drive system of new energy construction machinery vehicles, it includes: a drive motor and a control system, a battery and a management system. And the drive motor and the control system among them are its power sources and also the most critical components, and their performance directly affects the performance and economic performance of the whole vehicle.

[0004] However, the drive motor and the control system of the current electric drive system usually adopt independent design and separate installation, and the system integration degree is relatively low, resulting in disadvantages such as low space utilization rate and low system efficiency. Summary of the Invention

[0005] The present invention proposes the following technical solutions for the problems in the prior art:

[0006] An integrated new energy industrial vehicle electric drive system, including a control unit, a traction motor and a working motor. The traction motor and the working motor are arranged horizontally side by side, and the control unit is located above the traction motor and the working motor. There are connecting pieces between the control unit, the traction motor and the working motor;

[0007] The connecting piece includes two arc-shaped plates arranged oppositely. The tops of the two arc-shaped plates are fixedly connected with a hollow plate through a vertical plate. The outer sides of the two arc-shaped plates are respectively attached and fixed to the traction motor and the working motor. The control unit is fixedly installed on the top of the hollow plate, thereby realizing electromagnetic blocking at adjacent positions of the control unit, the traction motor and the working motor; a cooling system is arranged on the connecting piece to realize centralized heat dissipation of the control unit, the traction motor and the working motor.

[0008] As a preference of the above technical solution, heat conduction members are arranged on both the traction motor and the working motor. The heat conduction member includes a heat conduction ring arranged on the inner wall of the outer shell of the traction motor and the working motor. The outer wall of the heat conduction ring is fixedly connected with heat conduction clips, and the heat conduction clips penetrate through the outer walls of the traction motor and the working motor and extend to the outside of the traction motor and the working motor.

[0009] Preferably, as the above technical solution, connectors are provided on the outer side of the arc-shaped plate and the top of the hollow plate, and the traction motor, the operation motor and the control unit are fixedly installed on the connectors through the connectors.

[0010] Preferably, as the above technical solution, the cooling system includes a water cooling system and an air cooling system.

[0011] Preferably, as the above technical solution, the water cooling system includes:

[0012] A heat conduction block, which is designed in a stepped shape. A hollow plate cavity is formed inside the hollow plate. The lower stepped part of the heat conduction block is located in the hollow plate cavity, and the upper stepped part of the heat conduction block is located above the hollow plate and fits against the bottom of the control unit. Side water inlets and side water outlets are respectively and communicatively connected at the diagonal corners of the hollow plate cavity;

[0013] A heat conduction fin, an arc-shaped plate cavity is formed inside the arc-shaped plate, and the heat conduction fin is located inside the arc-shaped plate cavity. The tail end of the heat conduction fin extends to the outside of the arc-shaped plate and is bent. A lower water inlet and an upper water outlet are respectively and communicatively connected below and above the arc-shaped plate cavity.

[0014] Preferably, as the above technical solution, the air cooling system includes:

[0015] A cooling fan;

[0016] Lower fins, the top of the lower fins is fixed to the bottom of the heat conduction block, and the bottom of the lower fins penetrates through the hollow plate cavity and extends below the hollow plate;

[0017] Side fins, the side fins are fixedly connected to the inner side of the arc-shaped plate. A heat conduction copper tube is fixedly inserted among a plurality of side fins, and the tail end of the heat conduction copper tube is fixed to the tail end of the heat conduction fin.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. In the present invention, the traction motor and the operation motor adopt permanent magnet synchronous motors, which have the advantages of high power density, small volume, light weight, simple structure, flexible control, etc. The control unit is integrally designed with them. This integrated design not only reduces the length of the connecting wire harness, reduces the loss in energy conversion, improves the overall vehicle efficiency, but also has the advantages of small floor area and high space utilization rate as a whole, which is convenient for the installation and use of new energy construction engineering vehicles;

[0020] 2. In the present invention, the two arc-shaped plates arranged opposite to each other not only facilitate the adjacent fixed installation of the traction motor and the operation motor, but also block the traction motor and the operation motor, avoiding electromagnetic interference between the traction motor and the operation motor; by providing a hollow plate, it not only facilitates the fixed installation of the control unit, but also blocks the control unit from the traction motor and the operation motor, avoiding electromagnetic interference; in summary, the present invention realizes electromagnetic blocking at the adjacent positions of the control unit, the traction motor, and the operation motor through the provision of a connecting member; at the same time, a cooling system is provided on the connecting member, and the cooling system is used to achieve centralized heat dissipation of the control unit, the traction motor, and the operation motor, avoiding the problem of damage to the control unit, the traction motor, and the operation motor due to overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. shows a three-dimensional structural schematic diagram of an integrated new energy industrial vehicle electric drive system in an embodiment;

[0022] Figure 2 FIG. shows a front three-dimensional structural schematic diagram of a connecting member in an integrated new energy industrial vehicle electric drive system in an embodiment;

[0023] Figure 3 FIG. shows a back three-dimensional structural schematic diagram of a connecting member in an integrated new energy industrial vehicle electric drive system in an embodiment;

[0024] Figure 4 FIG. shows an internal structural schematic diagram of a hollow plate in an integrated new energy industrial vehicle electric drive system in an embodiment;

[0025] Figure 5 FIG. shows an internal structural schematic diagram of an arc-shaped plate in an integrated new energy industrial vehicle electric drive system in an embodiment;

[0026] Figure 6 FIG. shows a structural schematic diagram of a traction motor in an integrated new energy industrial vehicle electric drive system in an embodiment.

[0027] In the figure: 10, control unit; 21, traction motor; 22, operation motor; 200, heat conduction ring; 201, heat conduction clip; 30, connecting member; 300, cooling fan; 31, hollow plate; 310, hollow plate cavity; 311, side water inlet; 312, side water outlet; 313, heat conduction block; 314, lower fin; 32, arc-shaped plate; 320, arc-shaped plate cavity; 321, lower water inlet; 322, upper water outlet; 323, heat conduction sheet; 324, side fin; 325, heat conduction copper tube; 33, vertical plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] Embodiment

[0030] As Figure 1 shown, the integrated new energy industrial vehicle electric drive system includes a control unit 10, a traction motor 21 and a working motor 22. The traction motor 21 and the working motor 22 are arranged horizontally side by side, and the control unit 10 is located above the traction motor 21 and the working motor 22.

[0031] In the present invention, the traction motor 21 and the working motor 22 adopt permanent magnet synchronous motors, which have the advantages of high power density, small volume, light weight, simple structure, flexible control, etc. The control unit 10 is integrally designed with them. This integrated design not only reduces the length of the connecting wire harness, reduces the loss in energy conversion, improves the overall vehicle efficiency, but also has the advantages of small floor area and high space utilization, which is convenient for the installation and use of new energy construction machinery vehicles.

[0032] However, with the integrated and highly integrated design and distribution of the control unit 10, the traction motor 21 and the working motor 22, it is easy to generate problems of heat concentration and electromagnetic interference between the control unit 10, the traction motor 21 and the working motor 22. Therefore, a connecting member 30 is provided between the control unit 10, the traction motor 21 and the working motor 22 in the present invention;

[0033] As Figures 2 - 5 shown, the connecting member 30 includes two oppositely arranged arc-shaped plates 32. The tops of the two arc-shaped plates 32 are fixedly connected with a hollow plate 31 through a vertical plate 33. The outer sides of the two arc-shaped plates 32 are respectively attached and fixed to the traction motor 21 and the working motor 22, and the control unit 10 is fixedly installed on the top of the hollow plate 31.

[0034] Connectors are provided on the outer sides of the arc-shaped plates 32 and the top of the hollow plate 31. The traction motor 21, the working motor 22 and the control unit 10 are fixedly installed on the connecting member 30 through the connectors.

[0035] In the present invention, the two oppositely arranged arc-shaped plates 32 not only facilitate the adjacent fixed installation of the traction motor 21 and the working motor 22, but also block the traction motor 21 and the working motor 22, avoiding electromagnetic interference between the traction motor 21 and the working motor 22; by providing the hollow plate 31, it not only facilitates the fixed installation of the control unit 10, but also blocks the control unit 10 from the traction motor 21 and the working motor 22, avoiding their electromagnetic interference; in summary, the present invention realizes electromagnetic blocking at the adjacent positions of the control unit 10, the traction motor 21 and the working motor 22 by providing the connecting member 30; at the same time, a cooling system is provided on the connecting member 30, and the cooling system is used to realize the centralized heat dissipation of the control unit 10, the traction motor 21 and the working motor 22, avoiding the problem that the control unit 10, the traction motor 21 and the working motor 22 are damaged due to overheating.

[0036] The cooling system includes a water cooling system and an air cooling system.

[0037] The water cooling system includes:

[0038] A heat conducting block 313, the heat conducting block 313 is designed in a stepped shape. There is a hollow plate cavity 310 inside the hollow plate 31. The lower stepped part of the heat conducting block 313 is located in the hollow plate cavity 310, and the upper stepped part of the heat conducting block 313 is located above the hollow plate 31 and is in contact with the bottom of the control unit 10. A side water inlet 311 and a side water outlet 312 are respectively and interconnected at the diagonal corners of the hollow plate cavity 310;

[0039] A heat conducting fin 323, there is an arc-shaped plate cavity 320 inside the arc-shaped plate 32, and the heat conducting fin 323 is located inside the arc-shaped plate cavity 320. The tail end of the heat conducting fin 323 extends to the outside of the arc-shaped plate 32 and is bent. A lower water inlet 321 and an upper water outlet 322 are respectively and interconnected below and above the arc-shaped plate cavity 320.

[0040] As Figure 6 shown, heat conducting members are provided on both the traction motor 21 and the working motor 22. The heat conducting members include heat conducting rings 200 provided on the inner walls of the housings of the traction motor 21 and the working motor 22. Heat conducting clips 201 are fixedly connected to the outer walls of the heat conducting rings 200. The heat conducting clips 201 penetrate through the outer walls of the traction motor 21 and the working motor 22 and extend to the outside of the traction motor 21 and the working motor 22. After installation, the heat conducting clips 201 clamp the bent part at the tail end of the heat conducting fin 323 to transfer heat.

[0041] The working principle of the water cooling system is: the heat of the control unit 10 is transferred to the heat conducting block 313. Cooling water enters the hollow plate cavity 310 from the side water inlet 311, takes away the heat on the heat conducting block 313 and is discharged from the side water outlet 312; the heat of the traction motor 21 and the working motor 22 is transferred to the heat conducting fin 323 through the heat conducting rings 200 and the heat conducting clips 201. Cooling water enters from the lower water inlet 321, absorbs the heat on the heat conducting fin 323, and the heated cooling water floats up and is discharged from the upper water outlet 322.

[0042] The air cooling system includes:

[0043] A cooling fan 300;

[0044] Lower fins 314, the top of the lower fins 314 is fixed to the bottom of the heat conducting block 313, and the bottom of the lower fins 314 penetrates through the hollow plate cavity 310 and extends below the hollow plate 31;

[0045] The side fins 324 are fixedly connected to the inner side of the arc-shaped plate 32. A heat-conducting copper tube 325 is fixedly inserted among a plurality of the side fins 324, and the tail end of the heat-conducting copper tube 325 is fixed to the tail end of the heat-conducting fin 323.

[0046] The working principle of the air-cooling system is as follows: Part of the heat of the heat-conducting block 313 is transferred to the lower fins 314, and part of the heat of the heat-conducting fin 323 is transferred to the side fins 324 through the heat-conducting copper tube 325. Then, the cooling fan 300 operates to suck away the heat on the side fins 324 and the lower fins 314 by air extraction, thereby achieving the effect of air cooling.

[0047] In summary, the present invention dissipates heat by means of water cooling plus air cooling, and has a good heat dissipation effect, which is beneficial to the centralized heat dissipation of the control unit 10, the traction motor 21, and the working motor 22.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. An integrated new energy industrial vehicle electric drive system, comprising a control unit (10), a traction motor (21) and an operating motor (22), characterized in that: The traction motor (21) and the traction motor (21) are arranged horizontally side by side, and the control unit (10) is located above the traction motor (21) and the working motor (22), and a connecting piece (30) is arranged between the control unit (10), the traction motor (21), and the working motor (22); The connecting member (30) comprises two arc-shaped plates (32) arranged opposite to each other, the tops of the two arc-shaped plates (32) are fixedly connected to the hollow plate (31) via a vertical plate (33), the outer sides of the two arc-shaped plates (32) are respectively fitted and fixed on the traction motor (21) and the working motor (22), and the control unit (10) is fixedly mounted on the top of the hollow plate (31), thereby achieving electromagnetic blocking of adjacent positions of the control unit (10), the traction motor (21), and the working motor (22); and a cooling system is provided on the connecting member (30) for achieving centralized heat dissipation of the control unit (10), the traction motor (21), and the working motor (22).

2. The integrated new energy industrial vehicle electric drive system according to claim 1 is characterized in that: The traction motor (21) and the working motor (22) are both provided with a heat conducting member, the heat conducting member comprising a heat conducting ring (200) provided on the inner wall of the outer shell of the traction motor (21) and the working motor (22), the outer wall of the heat conducting ring (200) is fixedly connected with a heat conducting clip (201), and the heat conducting clip (201) penetrates the outer wall of the traction motor (21) and the working motor (22) and extends to the outside of the traction motor (21) and the working motor (22).

3. The integrated new energy industrial vehicle electric drive system according to claim 2 is characterized in that: Connecting pieces are provided on the outer side of the arc-shaped plate (32) and the top of the hollow plate (31), and the traction motor (21), the working motor (22) and the control unit (10) are fixedly mounted on the connecting piece (30) via the connecting piece.

4. The integrated new energy industrial vehicle electric drive system according to claim 2 is characterized in that: The cooling system includes a water cooling system and an air cooling system.

5. The integrated new energy industrial vehicle electric drive system according to claim 4 is characterized in that: The water cooling system comprises: A heat conducting block (313), wherein the heat conducting block (313) is designed in a stepped shape, a hollow plate cavity (310) is provided inside the hollow plate (31), a lower stepped portion of the heat conducting block (313) is located in the hollow plate cavity (310), an upper stepped portion of the heat conducting block (313) is located above the hollow plate (31) and is in contact with the bottom of the control unit (10), and a side water inlet (311) and a side water outlet (312) are respectively interconnected at opposite corners of the hollow plate cavity (310); A heat conducting sheet (323), wherein an arc-shaped plate cavity (320) is provided inside the arc-shaped plate (32), and the heat conducting sheet (323) is located inside the arc-shaped plate cavity (320), and the tail end of the heat conducting sheet (323) extends to the outside of the arc-shaped plate (32) and is bent, and a lower water inlet (321) and an upper water outlet (322) are respectively interconnected below and above the arc-shaped plate cavity (320).

6. The integrated new energy industrial vehicle electric drive system according to claim 5 is characterized in that: The air cooling system comprises: Cooling fan (300); A lower fin (314), wherein the top of the lower fin (314) is fixed to the bottom of the heat conducting block (313), and the bottom of the lower fin (314) passes through the hollow plate cavity (310) and extends to the bottom of the hollow plate (31); The side fins (324) are fixedly connected to the inner side of the arc-shaped plate (32); a heat-conducting copper tube (325) is fixedly plugged into the plurality of side fins (324); and the tail end of the heat-conducting copper tube (325) is fixed to the tail end of the heat-conducting sheet (323).

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