Power supply thermal management device of electric tractor

Abstract

The invention discloses an electric tractor power supply heat management device which comprises a U-shaped material placing plate, and the U-shaped material placing plate and a supporting bottom plate are connected through a supporting transverse plate. The graphite flake is arranged to dissipate heat of a power supply which is used for a short time, the power supply which is used for a long time and a short time enables the surface temperature of the graphite flake to be too high, a temperature sensor controls an electric telescopic rod to stretch, the electric telescopic rod pushes a heat dissipation fan to move, and the air outlet end of the heat dissipation fan is located under the graphite flake to dissipate heat of the graphite flake; when the surface temperature of the graphite sheet is reduced, the temperature sensor enables the electric telescopic rod to contract, the electric telescopic rod pulls the heat dissipation fan to move, and when the heat dissipation fan makes contact with the second microswitch, the second microswitch turns off the heat dissipation fan and enables the electric telescopic rod to stop contracting, at the moment, a space can be reserved below the graphite sheet, and natural heat dissipation of the graphite sheet is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of electric tractors, and in particular to a power supply thermal management device for electric tractors. Background Art

[0002] Aircraft tractors are classified into two types according to the traction method: aircraft tractors with a pole and aircraft tractors without a pole. In the early days, aircraft tractors with a pole were the only traditional tractors used for aircraft dispatching, which could meet the traction matching requirements for different aircraft. With the development of society, aircraft tractors without a pole have appeared in everyone's field of vision and are becoming increasingly mature.

[0003] According to the power energy classification, tractors are divided into three types: fuel-driven, hybrid and electric-driven. Electric tractors have the advantages of high energy conversion efficiency, low noise, no exhaust emissions and easy control. At present, fuel-driven aircraft tractors are mostly used, but with the increase in environmental governance efforts, relevant departments are considering replacing internal combustion tractors with electric tractors, and the demand for electric tractors in airports, railway stations and postal and telecommunications departments is also becoming increasingly prominent.

[0004] Compared with large aircraft tractors with manned vehicles, wireless electric tractors are smaller and more convenient. Manned tractors often have a cab and require many operating levers to complete the work. At the same time, multiple people often cooperate to drive a tractor. In the MOTOTOK electric tractor, all control buttons are integrated in a small remote control. Only one remote control is needed to easily complete the work of tractor aircraft, saving manpower. At the same time, this is a pure electric aircraft tractor, which uses electric drive to be more environmentally friendly. There is a drive wheel and a free wheel on each side of the tractor. The steering is achieved by the differential speed of the left and right drive wheels. The turning radius is very large, and the drive wheels are driven by two motors. The left and right sides of the vehicle are also equipped with 4 large-capacity 12V batteries. The 4 12V batteries are first connected in series to form a 48V battery pack, and then the battery packs on the left and right sides are connected in parallel to power the tractor.

[0005] The power supply of an electric tractor has become an important component of the tractor. A large amount of heat is generated when the power supply is working. Short-term use will not affect the output efficiency of the driving power supply. After long-term operation, the high temperature will cause creep and plastic deformation inside the power supply material, and then produce cracks, voids, etc., which seriously affect the output performance of the power supply. Nowadays, the heat dissipation of the power supply is generally only carried out through graphite sheets. The heat dissipation effect is acceptable for short-term use, but the heat dissipation is insufficient for long-term work. Summary of the invention

[0006] The object of the present invention is to provide a power supply thermal management device for an electric tractor to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric tractor power supply thermal management device comprises a U-shaped loading plate, wherein the U-shaped loading plate and a supporting bottom plate are connected by a supporting cross plate, a plurality of second positioning screw holes are arranged on one side of the upper surface of the U-shaped loading plate, a graphite sheet is placed on one side of the upper surface of the U-shaped loading plate, the graphite sheet and the U-shaped loading plate are threadedly connected by a plurality of positioning bolts, the positioning bolts are threadedly connected to the second positioning screw holes that are directly opposite to each other, a temperature sensor is fixedly installed on the upper surface of the U-shaped loading plate near the graphite sheet, limiting sliding grooves are arranged on both sides of the inner wall of the U-shaped loading plate, a limiting sliding block is slidably connected to the interior of each limiting sliding groove, a heat dissipation fan is fixedly connected between the two limiting sliding blocks, a plurality of heat dissipation through holes are arranged at the center of the lower surface of the U-shaped loading plate, the heat dissipation through holes are located below the heat dissipation fan, an electric telescopic rod is fixedly installed at the center of the inner wall of the U-shaped loading plate, and the telescopic end on one side of the electric telescopic rod is connected to the heat dissipation fan. One side of the fan is fixedly connected, a first microswitch is fixedly installed on the inner wall of the U-shaped material placing plate near the graphite sheet, and a second microswitch is fixedly installed on the inner wall of the U-shaped material placing plate away from the graphite sheet, the first microswitch and the second microswitch are both opposite to the position of the heat dissipation fan, and the upper surface of the U-shaped material placing plate and the graphite sheet are both provided with a plurality of first positioning screw holes; the purpose of such arrangement is: to dissipate the heat of the power supply used for a short period of time through the provided graphite sheet, and the power supply used for a long period of time or a short period of time will make the surface temperature of the graphite sheet too high, so that the temperature sensor controls the electric telescopic rod to extend, and the electric telescopic rod pushes the heat dissipation fan to move, so that the air outlet end of the heat dissipation fan is located directly below the graphite sheet to dissipate the heat of the graphite sheet, when the surface temperature of the graphite sheet decreases, the temperature sensor causes the electric telescopic rod to contract, and the electric telescopic rod pulls the heat dissipation fan to move, and when the heat dissipation fan contacts the second microswitch, the second microswitch turns off the heat dissipation fan and stops the electric telescopic rod from contracting, at which time space can be left under the graphite sheet to facilitate natural heat dissipation of the graphite sheet.

[0008] Preferably, four supporting upright plates are fixedly connected to the edge of the upper surface of the supporting bottom plate.

[0009] Preferably, a plurality of positioning through holes are formed on one side of each of the supporting uprights.

[0010] Preferably, a supporting cross plate is inserted and connected between every two adjacent positioning through holes.

[0011] Preferably, the upper surfaces of the two supporting transverse plates are in contact with the lower surface of the U-shaped placing plate.

[0012] Preferably, one end of the upper surface of the two supporting horizontal plates is fixedly connected with a pull ring.

[0013] Technical effects and advantages of the present invention: The device dissipates heat for short-term power supply through the graphite sheet. Long-term short-term power supply will make the surface temperature of the graphite sheet too high, so that the temperature sensor controls the electric telescopic rod to extend, and the electric telescopic rod pushes the heat dissipation fan to move, so that the air outlet of the heat dissipation fan is located directly below the graphite sheet to dissipate heat for the graphite sheet. When the surface temperature of the graphite sheet decreases, the temperature sensor causes the electric telescopic rod to shrink, and the electric telescopic rod pulls the heat dissipation fan to move. When the heat dissipation fan contacts the second micro switch, the second micro switch turns off the heat dissipation fan and stops the electric telescopic rod from shrinking. At this time, space can be left under the graphite sheet to facilitate the natural heat dissipation of the graphite sheet, thereby solving the problem of insufficient heat dissipation only through the graphite sheet. The pull-out ring, the supporting horizontal plate and the positioning through hole are provided to provide different use heights for the power supply to adapt to different height use requirements of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the connection structure between the U-shaped material placement plate and the graphite sheet in the present invention; Figure 3 It is a schematic diagram of the structure of the U-shaped material placing plate in the present invention.

[0015] In the figure: 1. U-shaped material placing plate; 2. Support bottom plate; 3. Graphite sheet; 4. Cooling fan; 5. Limit slide groove; 6. Electric telescopic rod; 7. Limit slider; 8. First positioning screw hole; 9. First micro switch; 10. Temperature sensor; 11. Second micro switch; 12. Second positioning screw hole; 13. Support vertical plate; 14. Positioning through hole; 15. Support horizontal plate; 16. Pull-out ring. DETAILED DESCRIPTION

[0016] 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.

[0017] The present invention provides Figure 1-3The electric tractor power supply thermal management device shown in the figure comprises a U-shaped material placing plate 1, the U-shaped material placing plate 1 and the supporting bottom plate 2 are connected by a supporting cross plate 15, a plurality of second positioning screw holes 12 are arranged on one side of the upper surface of the U-shaped material placing plate 1, a graphite sheet 3 is placed on one side of the upper surface of the U-shaped material placing plate 1, the graphite sheet 3 and the U-shaped material placing plate 1 are threadedly connected by a plurality of positioning bolts, the positioning bolts are threadedly connected to the second positioning screw holes 12 which are located opposite to each other, a temperature sensor 10 is fixedly installed on the upper surface of the U-shaped material placing plate 1 near the graphite sheet 3, both sides of the inner wall of the U-shaped material placing plate 1 are provided with limiting slide grooves 5, and the interior of each limiting slide groove 5 is slidably connected to a limiting slider 7, and two A heat dissipation fan 4 is fixedly connected between the limit sliders 7, a plurality of heat dissipation holes are arranged at the center of the lower surface of the U-shaped loading plate 1, and the heat dissipation holes are located below the heat dissipation fan 4, an electric telescopic rod 6 is fixedly installed at the center of the inner wall of the U-shaped loading plate 1, and the telescopic end on one side of the electric telescopic rod 6 is fixedly connected to one side of the heat dissipation fan 4, a first micro switch 9 is fixedly installed at the inner wall of the U-shaped loading plate 1 near the graphite sheet 3, and a second micro switch 11 is fixedly installed at the inner wall of the U-shaped loading plate 1 away from the graphite sheet 3, the first micro switch 9 and the second micro switch 11 are both opposite to the position of the heat dissipation fan 4, and a plurality of first positioning screw holes 8 are arranged on the upper surfaces of the U-shaped loading plate 1 and the graphite sheet 3.

[0018] like Figure 1 The electric tractor power supply thermal management device shown in the figure has four supporting vertical plates 13 fixedly connected to the edge of the upper surface of the supporting bottom plate 2, and a plurality of positioning through holes 14 are opened on one side of each supporting vertical plate 13, and a supporting cross plate 15 is inserted and connected between every two adjacent positioning through holes 14, and the upper surfaces of the two supporting cross plates 15 are in contact with the lower surface of the U-shaped material placing plate 1, and one end of the upper surface of the two supporting cross plates 15 is fixedly connected to a pull ring 16.

[0019] The working principle of the present invention is as follows: the power supply to be used is placed on the upper surface of the graphite sheet 3, the edge of the graphite sheet 3 is brought close to the first positioning screw hole 8, the power supply is positioned by threaded connection between the external bolt and the first positioning screw hole 8, the power supply is directly dissipated through the graphite sheet 3 for short-term use, when the power supply works for a long time, the surface temperature of the graphite sheet 3 is too high, so that the temperature sensor 10 controls the electric telescopic rod 6 to extend, and the electric telescopic rod 6 pushes the heat dissipation fan 4 to move, when one end of the heat dissipation fan 4 contacts the first micro switch 9, the first micro switch 9 closes the first electric telescopic rod 6, and the first micro switch 9 opens the heat dissipation fan 4, at this time the air outlet end of the heat dissipation fan 4 is located on the graphite sheet 3 The graphite sheet 3 is cooled directly below the graphite sheet 3. When the surface temperature of the graphite sheet 3 decreases, the temperature sensor 10 shrinks the electric telescopic rod 6, and the electric telescopic rod 6 pulls the heat dissipation fan 4 to move. When the heat dissipation fan 4 contacts the second microswitch 11, the second microswitch 11 turns off the heat dissipation fan 4 and stops shrinking the electric telescopic rod 6. At this time, space can be left below the graphite sheet 3 to facilitate the natural heat dissipation of the graphite sheet 3. When it is necessary to increase the use height of the power supply to a different level, the support cross plate 15 can be pulled out through the pull ring 16, and the support cross plate 15 can be inserted between the two positioning through holes 14 at a suitable height, and the U-shaped material placing plate 1 can be placed between the two support cross plates 15.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power supply thermal management device for an electric tractor, comprising a U-shaped material placement plate (1), characterized in that: The U-shaped material placement plate (1) and the supporting bottom plate (2) are connected via a supporting cross plate (15); a plurality of second positioning screw holes (12) are provided on one side of the upper surface of the U-shaped material placement plate (1); a graphite sheet (3) is placed on one side of the upper surface of the U-shaped material placement plate (1); the graphite sheet (3) and the U-shaped material placement plate (1) are threadedly connected via a plurality of positioning bolts; the positioning bolts are threadedly connected to the second positioning screw holes (12) that are directly opposite to each other; a temperature sensor (10) is fixedly installed on the upper surface of the U-shaped material placement plate (1) near the graphite sheet (3); limiting slide grooves (5) are provided on both sides of the inner wall of the U-shaped material placement plate (1); a limiting slide block (7) is slidably connected to the interior of each limiting slide groove (5); and a limiting slide block (7) is fixedly connected between the two limiting slide blocks (7). A heat dissipation fan (4), wherein a plurality of heat dissipation through holes are arranged at the center of the lower surface of the U-shaped material placement plate (1), and the heat dissipation through holes are located below the heat dissipation fan (4); an electric telescopic rod (6) is fixedly installed at the center of the inner wall of the U-shaped material placement plate (1), and a telescopic end on one side of the electric telescopic rod (6) is fixedly connected to one side of the heat dissipation fan (4); a first micro switch (9) is fixedly installed on the inner wall of the U-shaped material placement plate (1) near the graphite sheet (3); a second micro switch (11) is fixedly installed on the inner wall of the U-shaped material placement plate (1) away from the graphite sheet (3); the first micro switch (9) and the second micro switch (11) are both directly opposite to the position of the heat dissipation fan (4); and a plurality of first positioning screw holes (8) are arranged on the upper surfaces of the U-shaped material placement plate (1) and the graphite sheet (3).

2. The electric tractor power supply thermal management device according to claim 1, characterized in that: Four supporting upright plates (13) are fixedly connected to the edge of the upper surface of the supporting bottom plate (2).

3. The electric tractor power supply thermal management device according to claim 2, characterized in that: A plurality of positioning through holes (14) are provided on one side of each of the supporting upright plates (13).

4. The electric tractor power supply thermal management device according to claim 3, characterized in that: A supporting transverse plate (15) is inserted and connected between every two adjacent positioning through holes (14).

5. The electric tractor power supply thermal management device according to claim 4, characterized in that: The upper surfaces of the two supporting transverse plates (15) are in contact with the lower surface of the U-shaped material placement plate (1).

6. The electric tractor power supply thermal management device according to claim 4, characterized in that: One end of the upper surface of the two supporting horizontal plates (15) is fixedly connected with a draw ring (16).

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