Constant current power supply for electric tractor

Abstract

The utility model provides a constant current power supply for an electric tractor, which comprises a power supply shell, a drawer pull plate, a transformer unit and a filter unit, the drawer pull plate is arranged in the power supply shell in a sliding manner through a drawer track strip, and a separation connecting strip is arranged in the middle of an inner cavity of the drawer pull plate; the transformer unit and the filtering unit are arranged in an inner cavity of the drawer pull plate through separation connecting strips, a heat dissipation salient point plate is arranged at the top end of the power supply shell, terminal connecting columns are arranged at the input end and the output end of the transformer unit, and one ends of the two terminal connecting columns are connected with an output power line and an input power line. According to the utility model, the drawer pulling plate is arranged, the transformer unit and the filter unit are arranged in the inner cavity of the drawer pulling plate through the separation connecting strip, a terminal connecting column connection mode is adopted, a good separation effect is achieved, the transformer unit and the filter unit can be conveniently taken out at a time through the drawer pulling plate, and better maintenance work is facilitated; the use is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tractors and relates to a constant current power supply for electric tractors. Background Art

[0002] Aircraft tugs are classified into two main types based on their towing method: towbar-mounted and towbarless. In the early days, towbar-mounted tugs were the only traditional type used for aircraft dispatching, capable of towing a variety of aircraft. With the development of society, towbarless tugs have emerged and are becoming increasingly mature.

[0003] Tractors are classified by power source into three types: fuel-powered, hybrid-powered, and electric-powered. Electric tractors offer advantages such as high energy conversion efficiency, low noise, zero exhaust emissions, and easy control. Currently, fuel-powered aircraft tractors are the most common type of tractor, but with increasing environmental governance efforts, relevant departments are considering replacing internal combustion tractors with electric tractors. Demand for electric tractors is also growing at airports, railway stations, and postal and telecommunications departments.

[0004] Compared to large, manned aircraft tractors, cordless electric tractors are smaller and more convenient. Manned tractors typically have a cab and require numerous levers to operate, often requiring multiple personnel to operate the tractor. In contrast, the MOTOTOK electric tractor features a compact remote control, allowing for easy aircraft towing operations, saving manpower. This purely electric aircraft tractor utilizes an electric drive for environmental protection. The tractor features a drive wheel and freewheel on each side, achieving a large turning radius through differential steering. The drive wheels are driven by two electric motors. Four high-capacity 12V batteries are installed on each side of the vehicle. These four 12V batteries are connected in series to form a 48V battery pack, which is then connected in parallel to power the tractor.

[0005] The driving power supply of an electric tractor has become an important component of the tractor. Currently, when the tractor body is connected to the adapted driving power supply, the power connector and the power interface are mainly plugged into each other to achieve conduction between the driving power supply and the tractor body. However, the existing constant current power supply of the tractor has the following disadvantages: in the prior art, the filter unit and the transformer unit are usually assembled by welding, so they cannot be quickly removed during maintenance, which is inconvenient. Therefore, we designed a constant current power supply for an electric tractor. Utility Model Content

[0006] The purpose of the present utility model is to provide a constant current power supply for an electric tractor to solve the problems raised in the above background technology.

[0007] The purpose of the utility model can be achieved through the following technical solutions: a constant current power supply for an electric traction vehicle, comprising a power supply housing, a drawer pull plate, a transformer unit and a filter unit, wherein a drawer track bar is provided inside the power supply housing, the drawer pull plate is slidably arranged inside the power supply housing through the drawer track bar, a separating connecting strip is provided in the middle of the inner cavity of the drawer pull plate, the transformer unit and the filter unit are arranged in the inner cavity of the drawer pull plate through the separating connecting strip, a heat dissipation bump plate is provided at the top of the power supply housing, the input and output ends of the transformer unit are both provided with terminal connecting columns, one end of each of the two terminal connecting columns is connected to an output power line and an input power line, and one end of the output power line and one end of the input power line are both provided with terminal plug columns.

[0008] In the above-mentioned constant current power supply for electric tractors, a buffer plate is installed in the inner cavity of the drawer pull plate, a heat dissipation base is provided on the top of the buffer plate, and the top of the heat dissipation base is connected to the filter unit through two insulating clips.

[0009] In the above-mentioned constant current power supply for electric traction vehicles, two wire-taking protection cylinders are provided on one side of the power supply housing, and wire-taking poles are provided inside the two wire-taking protection cylinders. The output power line and the input power line are respectively connected to the two wire-taking poles, and limiting clamping rings are provided on the sides of the two wire-taking protection cylinders.

[0010] In the above-mentioned constant current power supply for electric tractors, a rotating handle seat is installed at the bottom of one side of the drawer pull plate, and a cylindrical pull handle is installed inside the rotating handle seat.

[0011] In the above-mentioned constant current power supply for electric tractors, sealing strips are provided at the connection gaps between the drawer pull plate and the power supply housing.

[0012] In the above-mentioned constant current power supply for electric tractors, dust-proof and breathable nets are provided on the front and back of the power supply housing.

[0013] Compared with the prior art, the advantages of the constant current power supply for electric tractors of the present invention are as follows: by providing a drawer pull plate, and arranging the transformer unit and the filter unit in the inner cavity of the drawer pull plate through a separating connecting strip, and adopting a terminal connecting column connection method, it has a good separation effect, and the transformer unit and the filter unit can be easily taken out at one time through the drawer pull plate, which is convenient for better maintenance work and easy to use; by providing a wire-reeling protection tube, a wire-reeling column and a limit clamping ring, it has a good effect of storing the output power line and the input power line, which is convenient for reducing the drag of carrying the power line, and at the same time plays a good role in protecting the output power line and the input power line. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of a constant current power supply for an electric tractor according to the present utility model.

[0015] Figure 2 The utility model is a schematic diagram of the internal structure of a power supply shell of a constant current power supply for an electric tractor.

[0016] Figure 3 The utility model is a structural schematic diagram of a constant current power supply take-up protection cylinder for an electric tractor.

[0017] In the figure, 1. Power supply housing; 2. Heat dissipation bump plate; 3. Drawer pull plate; 4. Rotating handle base; 5. Cylindrical pull handle; 6. Dust-proof and breathable mesh; 7. Sealing strip; 8. Terminal plug post; 9. Wire take-up protective tube; 10. Output power cord; 11. Input power cord; 12. Transformer unit; 13. Separation connecting strip; 14. Filter unit; 15. Buffer pad; 16. Insulation card strip; 17. Heat dissipation base; 18. Drawer track bar; 19. Terminal connection post; 20. Wire take-up post; 21. Limiting clamp ring. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figure 1 、 Figure 2 and Figure 3 As shown, the utility model is a constant current power supply for electric traction vehicles.

[0020] Embodiment 1: A constant current power supply includes a power supply housing 1, a drawer pull panel 3, a transformer unit 12 and a filter unit 14. A drawer track bar 18 is provided inside the power supply housing 1. The drawer pull panel 3 is slidably arranged inside the power supply housing 1 through the drawer track bar 18. A separating connecting strip 13 is provided in the middle of the inner cavity of the drawer pull panel 3. The transformer unit 12 and the filter unit 14 are arranged in the inner cavity of the drawer pull panel 3 through the separating connecting strip 13. A heat dissipation bump plate 2 is provided at the top of the power supply housing 1. Terminal connecting columns 19 are provided at the input and output ends of the transformer unit 12. One end of the two terminal connecting columns 19 is connected to the output power line 10 and the input power line 11. Terminal plug columns 8 are provided at one end of the output power line 10 and one end of the input power line 11.

[0021] In this embodiment, in order to better dissipate heat and facilitate the removal of the filter unit 14, a buffer pad 15 is installed in the inner cavity of the drawer pull plate 3, and a heat dissipation base 17 is provided at the top of the buffer pad 15. The top of the heat dissipation base 17 is connected to the filter unit 14 through two insulating strips 16.

[0022] In this embodiment, in order to wrap and store the output power cord 10 and the input power cord 11, and to facilitate the protection of the output power cord 10 and the input power cord 11, two wire-taking protection tubes 9 are provided on one side of the power supply housing 1, and wire-taking posts 20 are provided inside the two wire-taking protection tubes 9. The output power cord 10 and the input power cord 11 are respectively connected to the two wire-taking posts 20, and the sides of the two wire-taking protection tubes 9 are provided with limiting clamping rings 21.

[0023] In this embodiment, in order to facilitate the pulling out and pushing in of the drawer pull plate 3 , a rotating handle seat 4 is installed at the bottom of one side of the drawer pull plate 3 , and a cylindrical pull handle 5 is installed inside the rotating handle seat 4 .

[0024] In this embodiment, in order to achieve good sealing and ensure good ventilation and heat dissipation, a sealing strip 7 is provided at the connection gap between the drawer pull plate 3 and the power supply housing 1. A dustproof and breathable net 6 is provided on the front and back of the power supply housing 1.

[0025] Working principle: The constant current power supply is composed of a power supply casing 1, a drawer pull plate 3, a transformer unit 12 and a filter unit 14. A drawer track bar 18 is arranged inside the power supply casing 1. The drawer pull plate 3 is slidably arranged inside the power supply casing 1 through the drawer track bar 18. A separating connecting strip 13 is arranged in the middle of the inner cavity of the drawer pull plate 3. The transformer unit 12 and the filter unit 14 are arranged in the inner cavity of the drawer pull plate 3 through the separating connecting strip 13. A buffer pad 15 is installed in the inner cavity of the drawer pull plate 3. The buffer pad 15 is connected to the filter unit 14 through the heat dissipation base 17 on the buffer pad 15, and is well limited by two insulating card strips 16. The above design facilitates the one-time removal of the transformer unit 12 and the filter unit 14, facilitates better maintenance work, and is easy to use.

[0026] In the present invention, one end of the output power line 10 and one end of the input power line 11 are both provided with terminal plugs 8, which are connected to the tractor through the terminal plugs 8. A take-up post 20 is provided inside the two take-up protection tubes 9. The output power line 10 and the input power line 11 are respectively connected to the two take-up posts 20, which can be adjusted according to the length of use, so as to reduce the wiring harness exposed to the outside and achieve a certain protective effect.

[0027] In the present invention, the filter unit 14 includes an LC filter portion and a current filter portion. The LC filter portion includes an inductor L and a small-capacitance capacitor C and is connected to the voltage output terminal DC- at the output end. The LC filter portion filters the DC high-ripple voltage of the bridge rectifier unit into a DC low-ripple voltage, meeting the tractor's requirement for low-ripple voltage. The current filter portion is connected in series after the LC filter unit to further reduce current ripple. The current filter portion includes an inductor L, with the second end of the inductor L serving as the current output terminal DC+ at the output end. The current filter portion filters the DC high-ripple current of the bridge rectifier unit into a DC low-ripple current, meeting the tractor's requirement for low-ripple current. The transformer unit 12 is a transformer component of the prior art.

[0028] Matters not described in detail in this specification constitute prior art known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art to which the present invention relates may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A constant current power supply for an electric tractor, comprising a power supply housing (1), a drawer pull plate (3), a transformer unit (12) and a filter unit (14), characterized in that: A drawer rail bar (18) is provided inside the power supply housing (1), the drawer pull plate (3) is slidably provided inside the power supply housing (1) through the drawer rail bar (18), a separating connecting bar (13) is provided in the middle of the inner cavity of the drawer pull plate (3), the transformer unit (12) and the filter unit (14) are provided in the inner cavity of the drawer pull plate (3) through the separating connecting bar (13), a heat dissipation bump plate (2) is provided at the top of the power supply housing (1), the input end and the output end of the transformer unit (12) are both provided with terminal connecting columns (19), one end of each of the two terminal connecting columns (19) is connected to an output power line (10) and an input power line (11), and one end of the output power line (10) and one end of the input power line (11) are both provided with terminal plug columns (8).

2. The constant current power supply for electric tractor according to claim 1, characterized in that: A buffer plate (15) is installed in the inner cavity of the drawer pull plate (3), a heat dissipation base (17) is provided at the top end of the buffer plate (15), and the top end of the heat dissipation base (17) is connected to the filter unit (14) via two insulating clips (16).

3. The constant current power supply for electric tractor according to claim 1, characterized in that: Two wire-receiving protective cylinders (9) are provided on one side of the power supply housing (1), and wire-receiving posts (20) are provided inside the two wire-receiving protective cylinders (9). The output power line (10) and the input power line (11) are respectively connected to the two wire-receiving posts (20), and the sides of the two wire-receiving protective cylinders (9) are provided with limiting clamping rings (21).

4. The constant current power supply for an electric tractor according to claim 1, characterized in that: A rotating handle seat (4) is installed at the bottom of one side of the drawer pull plate (3), and a cylindrical pull handle (5) is installed inside the rotating handle seat (4).

5. The constant current power supply for electric tractor according to claim 1, characterized in that: Sealing strips (7) are provided at the connection gaps between the drawer pull plate (3) and the power supply housing (1).

6. The constant current power supply for an electric tractor according to claim 1, characterized in that: The front and back of the power supply housing (1) are both provided with dust-proof and air-permeable nets (6).

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