Low-energy-consumption cooling device for pure electric tractor

Abstract

The invention relates to the technical field of pure electric tractors, in particular to a low-energy-consumption cooling device for a pure electric tractor, which comprises a heat dissipation fan and a hand-operated generator, and the heat dissipation fan and the hand-operated generator are matched with the pure electric tractor for use and are both arranged on the pure electric tractor. The hand-operated generator can be used for charging a storage battery installed on the pure electric tractor and supplying power to a cooling fan, the hand-operated generator further comprises a traction frame, a driving rod, a driving assembly and an adjusting assembly, and the traction frame is arranged on an upper arm of the pure electric tractor. Through the arrangement of the hand-operated power generator and the driving assembly, the hand-operated power generator can be driven to generate power in the braking process of the pure electric tractor, and the power generation efficiency of the hand-operated power generator is improved when the pure electric tractor turns and brakes; auxiliary energy supply to the storage battery and the heat dissipation fan is achieved, meanwhile, system energy consumption during working of the heat dissipation fan is reduced, and therefore the driving mileage of the pure electric tractor is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of pure electric tractor vehicles, in particular to a low-energy consumption cooling device for a pure electric tractor vehicle. Background Art

[0002] A pure electric tractor is a vehicle that uses batteries as a new energy source and is driven by an electric motor for cargo transportation and traction operations. Since the weight of the cargo towed by a pure electric tractor is not fixed during operation, the heavier the cargo, the higher the output power required by the motor, and the greater the operating load of the motor, the greater the operating load of the motor, and the higher the heat generated by its internal windings, so the motor needs to be cooled and cooled to ensure normal use of the motor.

[0003] Conventional methods include air cooling, liquid cooling and heat pipe cooling, among which air cooling includes natural convection cooling and forced convection cooling. Natural convection cooling uses the airflow generated during the driving of the tractor to achieve heat exchange between the internal and external temperatures of the motor, thereby cooling the motor and ensuring the normal working state of the motor. However, when the outdoor temperature of the factory area is high in summer, the efficiency of heat exchange between the inside and outside of the motor will be limited by natural convection alone, resulting in heat accumulation inside the motor. In order to maintain the same mechanical output power, the motor needs to obtain more electrical energy from the battery, thereby increasing the energy consumption of the battery and shortening the mileage of the electric tractor. In view of the above problems, there are better solutions in the prior art: such as a motor with cooling function for a new energy vehicle with publication number CN115498809B. By installing two sets of fans inside the working shell, the connection between the motor body and the rotating shaft can be cooled at multiple angles by forced convection during operation, and the hot air blown away by the fan can be cooled to improve the heat dissipation effect, thereby reducing the energy consumption required for the motor to maintain the same output power. However, the following problems still exist: since the cooling fan also uses the battery on the tractor as a power source, and when accelerating and turning, the electric motor needs to provide output torque, which increases the output power. In order to ensure normal heat dissipation of the electric motor, the output power of the cooling fan needs to be increased, which will also increase the energy consumption of the battery and still affect the mileage of the pure electric tractor.

[0004] Therefore, in order to solve the above problems, a low energy consumption cooling device for a pure electric tractor is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a low-energy cooling device for a pure electric tractor, which solves the problem that when the output power of the heat dissipation fan is increased to ensure the heat dissipation effect of the electric motor, the energy consumption of the battery will be increased, thereby reducing the mileage of the tractor. Through the hand-cranked generator and drive assembly, the kinetic energy of the carriage can be used to drive the hand-cranked generator to automatically generate electricity during the braking process of the pure electric tractor. At the same time, in conjunction with the adjustment assembly, the driving force arm of the drive shaft of the hand-cranked generator is adjusted during the turning process of the pure electric tractor, so that the power generation efficiency of the hand-cranked generator is improved during the turning braking of the pure electric tractor, and the auxiliary energy supply to the battery and the heat dissipation fan is realized, while the system energy consumption when the heat dissipation fan is working is reduced, effectively ensuring the mileage of the pure electric tractor.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A low-energy cooling device for a pure electric tractor comprises a heat dissipation fan and a hand-cranked generator, wherein the heat dissipation fan and the hand-cranked generator are used in conjunction with the pure electric tractor and are both arranged on the pure electric tractor, and the hand-cranked generator can be used to charge a battery installed on the pure electric tractor and to supply power to the heat dissipation fan, and further comprises a traction frame, a drive rod, a drive assembly and an adjustment assembly, wherein the traction frame is arranged on the pure electric tractor, a drive shaft is arranged on the hand-cranked generator, the drive rod is arranged on the hand-cranked generator, the drive assembly is arranged on the drive shaft and is connected to the traction frame through the drive rod, when the pure electric tractor changes speed, the drive assembly drives the drive shaft to rotate in one direction through the drive rod, and the adjustment assembly is arranged on the traction frame, and when the pure electric tractor turns, the adjustment assembly reduces the power arm of the drive rod through the traction frame.

[0008] Preferably, the traction frame includes a fixed rod, a traction plate, a spring and a latch, the fixed rod is arranged on the pure electric tractor, the traction plate is sleeved on the fixed rod, the spring is sleeved on the fixed rod and its two ends are respectively connected to the traction plate and the fixed rod, the latch is arranged through the traction plate, and the stiffness of the spring is arranged to increase from the front to the rear of the pure electric tractor.

[0009] It can be seen that the pure electric tractor is usually connected to the carriage for transporting goods through a hook. When the pure electric tractor accelerates or brakes during driving, a hard collision will occur at the hook position, affecting the service life of the hook, so this solution is adopted. By setting the spring and setting the stiffness of the spring, the elastic deformation of the spring can play an effective buffering role when the pure electric tractor accelerates or brakes, thereby protecting the connection between the pure electric tractor and the carriage.

[0010] Preferably, the driving assembly includes a U-shaped rod, a slider, an axle pin, a support shaft, a toothed plate and a gear, the U-shaped rod is arranged on the traction plate, the slider is sleeved on the U-shaped rod, the axle pin is arranged on the slider, the support shaft is arranged on the hand-cranked generator, the driving rod includes an inner rod and an outer tube, the inner rod is sleeved with the outer tube, one end of the inner rod located outside the outer tube is sleeved with the axle pin, the outer tube is connected to the support shaft, the gear is arranged on the driving shaft, the toothed plate is arranged at the end of the outer tube and has an arc-shaped opening on the surface, a toggle assembly is arranged inside the arc-shaped opening, and when the outer tube rotates with the support shaft as the rotation axis, the toggle assembly drives the driving shaft to rotate through the gear.

[0011] It can be seen that the pure electric tractor is powered by a battery when driving, and the battery is also responsible for supplying energy to the cooling fan. Since the kinetic energy of the pure electric tractor during driving is converted from the electrical energy of the battery, when the pure electric tractor brakes, the kinetic energy of the carriage cannot be recycled and is wasted, which affects the power supply time of the battery. Therefore, this solution is adopted. Through the set drive assembly and hand-cranked generator, the kinetic energy of the carriage can be used to drive the drive shaft of the hand-cranked generator to rotate quickly during the braking process of the pure electric tractor, so that the automatic power generation of the hand-cranked generator is realized, the kinetic energy loss during the driving process of the pure electric tractor is reduced, and the auxiliary power supply to the battery and the cooling fan can be realized to a certain extent. While ensuring the heat dissipation effect of the cooling fan, it can reduce energy consumption, thereby extending the working time of the battery.

[0012] Preferably, the adjusting assembly includes a hanging piece, a pull rod, a second axle pin, a collar, a connecting rod, a rectangular frame, a driving block and an adjusting block. The hanging piece is arranged on one side of the traction plate and includes a connected annular plate and an L-shaped hook. A strip opening is provided on the traction plate. The pull rod is arranged through the strip opening and is connected to the slider. The latch is arranged through the annular plate. The second axle pin is arranged on the annular plate. The collar is sleeved on the second axle pin. The connecting rod is arranged on the collar. The rectangular frame is arranged on the connecting rod and is sleeved on the pull rod. The driving block is arranged inside the rectangular frame and has a driving groove on its surface. The adjusting block is arranged on the pull rod and is connected to the driving groove. When the annular plate rotates relative to the pure electric tractor, the adjusting block reduces the length of the inner rod outside the outer tube through the driving groove.

[0013] It can be seen that when the pure electric tractor is turning, it needs to overcome additional lateral force to maintain the stability and driving track of the vehicle, which requires the motor to provide greater torque and output power. In the process of providing greater torque and output power, the motor needs the battery to provide more electrical energy, resulting in more electrical energy loss in the battery, so this solution is adopted. Through the setting of the adjustment component, the distance between the axle pin 1 and the support shaft can be shortened when the pure electric tractor is turning, and the distance between the axle pin 1 and the support shaft is determined by the turning angle. The greater the turning angle, the shorter the distance between the axle pin 1 and the support shaft, thereby reducing the power arm of the drive rod. When the motor provides greater torque and output power, the reduced driving force arm can be used to cooperate with the braking action during turning to achieve faster driving of the drive shaft on the hand-cranked generator, thereby improving the power generation efficiency, thereby reducing the energy consumption of the battery, and achieving low-energy cooling of the motor of the pure electric tractor.

[0014] Preferably, the toggle assembly comprises an elastic telescopic rod, which is arranged on the inner outer ring of the arc-shaped opening, and the free end of the elastic telescopic rod is meshed with the gear, and the free end is arranged in a wedge-shaped surface.

[0015] It can be seen that the power generation effect can only be achieved when the drive shaft of the hand-cranked generator rotates in one direction. By adopting the above scheme, utilizing the retractable characteristics of the elastic telescopic rod and the wedge-shaped surface set at the free end of the elastic telescopic rod, the drive shaft can be driven to rotate in one direction when the tooth plate follows the outer tube to reciprocate with the support shaft as the rotation axis, thereby ensuring the normal power generation function of the hand-cranked generator, achieving the effect of auxiliary energy supply to the battery and the cooling fan, and then achieving low-energy cooling of the electric motor of the pure electric tractor.

[0016] Preferably, the driving groove includes an inner groove and a notch, the inner groove is arranged inside the driving block, the notch is arranged on the surface of the driving block and is connected to the notch, the adjusting block includes an adjusting rod and an adjusting ball, the adjusting rod is arranged on the pull rod and passes through the notch, and the adjusting ball is arranged on the adjusting rod and is slidably arranged inside the inner groove.

[0017] By adopting the above scheme, when the electric tractor turns, due to the different directions of the turn, the driving block will follow the rectangular frame to approach or move away from the direction of the pure electric tractor, so that the adjusting rod can be driven to move between the heat dissipation fan and the hand-cranked generator through the guiding effect of the inner groove and the adjusting ball, so that when the pure electric tractor deviates from the neutral position (the neutral position is the straight-line driving direction), the distance between the axle pin 1 and the support shaft can be reduced, that is, the power arm of the driving rod is automatically reduced during the turning process of the pure electric tractor, and then the power generation speed of the hand-cranked generator is accelerated when the pure electric tractor brakes during the turning process, thereby ensuring the auxiliary power supply to the battery and the heat dissipation fan, and further reducing the energy consumption of the battery caused by the heat dissipation fan when working.

[0018] Preferably, the distance between the central axis of the axle pin 2 and the pure electric tractor is equal to the distance between the central axis of the bolt and the pure electric tractor.

[0019] By adopting the above scheme, when the pure electric tractor deviates from the neutral position and no matter which direction the electric tractor turns, the axle pin 1 can be moved toward the direction of the supporting shaft, thereby reducing the power arm of the driving rod, accelerating the power generation speed of the hand-cranked generator, and reducing the energy consumption of the battery caused by the cooling fan when working.

[0020] Preferably, the distance between the support shaft and the axle pin 1 is smaller than the distance between the support shaft and the right end of the outer tube.

[0021] By adopting the above scheme, the power arm of the inner rod when driving the outer tube to rotate with the support shaft as the rotation axis will be smaller than the resistance arm, so that when the end of the inner rod moves a short distance through the shaft pin 1, the outer tube can drive the gear plate to move quickly for a long distance, so that the drive shaft of the hand-cranked generator can be driven under the action of the gear to ensure the power generation function of the hand-cranked generator, thereby realizing the charging of the battery installed on the pure electric tractor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By providing a hand-cranked generator, a driving assembly and a driving rod, the driving shaft on the hand-cranked generator can be driven to rotate by the driving rod during the braking process of the pure electric tractor, and the size difference between the power arm and the resistance arm of the driving rod can be utilized to enable one end of the driving rod to achieve rapid rotation of the driving shaft under the action of a small displacement generated during the braking process of the pure electric tractor, thereby ensuring effective power generation of the hand-cranked generator, and the hand-cranked generator can provide auxiliary power supply to the battery and the cooling fan during power generation, reducing the kinetic energy loss during braking while achieving low-energy heat dissipation cooling of the electric motor of the pure electric tractor, thereby ensuring the mileage of the pure electric tractor.

[0024] 2. Through the provided toggle assembly, under the action of the wedge-shaped surface of the free end of the elastic telescopic rod, when the pure electric tractor is braked and the toothed plate rotates forward with the support shaft as the rotation axis, the free end of the elastic telescopic rod can continuously mesh with the gear and drive the gear to rotate; and when the pure electric tractor is accelerated and the toothed plate rotates reversely with the support shaft as the rotation axis, the free end of the elastic telescopic rod can be squeezed and contracted by the gear under the action of the wedge-shaped surface, thereby ensuring that the drive shaft of the hand-cranked generator does not rotate, that is, the hand-cranked generator does not work when the pure electric tractor is accelerated, and is in a power generation state during braking, thereby being able to provide auxiliary energy to the battery and the cooling fan, ensuring low-energy heat dissipation cooling of the pure electric tractor by the cooling fan.

[0025] 3. By setting the adjustment component, the power arm of the driving rod can be reduced when the pure electric tractor is in a turning state, and the larger the turning angle, the smaller the power arm of the driving rod. When the pure electric tractor brakes in a turning state and causes the traction plate to approach the tractor, the driving rod can rotate with the support shaft as the rotation axis, and when one end of the driving rod close to the traction plate rotates a small angle, the other end can also rotate a larger angle in the same time, thereby accelerating the rotation speed of the gear and the driving shaft, thereby improving the power generation efficiency of the hand-cranked generator, and further ensuring the low-energy heat dissipation cooling of the pure electric tractor by the heat dissipation fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the connection structure of the hand-cranked generator, the traction plate and the driving assembly of the present invention;

[0028] Figure 3 For the present invention Figure 2 An enlarged view of the local A in the middle;

[0029] Figure 4 It is a schematic diagram of the connection structure between the traction plate and the adjustment assembly of the present invention;

[0030] Figure 5 It is a schematic diagram of the connection structure of the pull rod, the connecting rod and the rectangular frame of the present invention;

[0031] Figure 6 For the present invention Figure 5 An enlarged view of the local B portion;

[0032] Figure 7 It is a state diagram of the gear plate when the pure electric tractor of the present invention is accelerating;

[0033] Figure 8 For the present invention Figure 7 Enlarged view of the local C part

[0034] Fig. 9 This is a state diagram of the tooth plate when the pure electric tractor of the present invention is braked.

[0035] In the figure: 1, cooling fan; 2, hand-cranked generator; 21, drive shaft; 3, pure electric tractor; 4, traction frame; 41, fixed rod; 42, traction plate; 421, strip mouth; 43, spring; 44, latch; 5, drive rod; 51, inner rod; 52, outer tube; 6, drive assembly; 61, U-shaped rod; 62, slider; 63, shaft pin 1; 64, support shaft; 65, tooth plate; 651, arc mouth ; 66, gear; 7, adjustment assembly; 71, hanging piece; 712, L-shaped hook; 711, ring plate; 72, pull rod; 73, axle pin 2; 74, collar; 75, connecting rod; 76, rectangular frame; 77, drive block; 771, drive groove; 7711, inner groove; 7712, notch; 78, adjustment block; 781, adjustment rod; 782, adjustment ball; 8, toggle assembly; 81, elastic telescopic rod. DETAILED DESCRIPTION

[0036] 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.

[0037] See also Figures 1 to 8 The present invention provides a low-energy cooling device for a pure electric tractor, and the technical solution is as follows:

[0038] For details, please refer to Figure 1 A low-energy cooling device for a pure electric tractor 3 includes a heat dissipation fan 1 and a hand-cranked generator 2. The heat dissipation fan 1 and the hand-cranked generator 2 are used in conjunction with the pure electric tractor 3 and are both arranged on the pure electric tractor 3. The device also includes a traction frame 4, a drive rod 5, a drive assembly 6 and an adjustment assembly 7. The traction frame 4 is arranged on the pure electric tractor 3. The traction frame 4 includes a fixed rod 41, a traction plate 42, a spring 43 and a latch 44. The fixed rod 41 is arranged on the pure electric tractor 3. The traction plate 42 is sleeved on the fixed rod 41. The spring 43 is sleeved on the fixed rod 41 and the two ends are respectively connected to the traction plate 42 and the fixed rod 41. The latch 44 is arranged through the traction plate 42. The stiffness of the spring 43 is gradually increased from the front of the pure electric tractor 3 to the rear of the vehicle.

[0039] Under the above setting conditions, when the pure electric tractor 3 accelerates or brakes, the traction plate 42 will be subjected to stress. When the pure electric tractor 3 accelerates, the distance between the traction plate 42 and the pure electric tractor 3 increases, and the spring 43 is squeezed during this process; when the pure electric tractor 3 brakes, the distance between the traction plate 42 and the pure electric tractor 3 decreases, and the spring 43 is stretched during this process. The spring 43 absorbs part of the kinetic energy during its deformation and plays a buffering effect, thereby avoiding a hard collision at the connection between the pure electric tractor 3 and the car body.

[0040] As an embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 4 The hand-cranked generator 2 is provided with a driving shaft 21, a driving rod 5 is provided on the hand-cranked generator 2, a driving assembly 6 is provided on the driving shaft 21 and is connected to the traction frame 4 through the driving rod 5, the driving assembly 6 includes a U-shaped rod 61, a slider 62, an axle pin 63, a support shaft 64, a tooth plate 65 and a gear 66, the U-shaped rod 61 is provided on the traction plate 42, the slider 62 is sleeved on the U-shaped rod 61, an axle pin 63 is provided on the slider 62, and the support shaft 64 is provided on the hand-cranked generator 2, the driving rod 5 includes an inner rod 51 and an outer tube 52, the inner rod 51 is sleeved with the outer tube 52, one end of the inner rod 51 located outside the outer tube 52 is sleeved with the axle pin 63, the outer tube 52 is connected to the support shaft 64, the gear 66 is provided on the driving shaft 21, and the tooth plate 65 is provided An arc-shaped opening 651 is provided on the end and surface of the outer tube 52, and a toggle assembly 8 is arranged inside the arc-shaped opening 651. When the outer tube 52 rotates with the support shaft 64 as the rotation axis, the toggle assembly 8 drives the drive shaft 21 to rotate through the gear 66; the distance between the support shaft 64 and the shaft pin 63 is smaller than the distance between the support shaft 64 and the right end of the outer tube 52, and the power arm when the outer tube 52 rotates is smaller than the resistance arm, so that when the left end of the outer tube 52 rotates around the support shaft 64, the moving path of the right end of the outer tube 52 is greater than that of the left end, so that the driving gear 66 can rotate quickly, thereby accelerating the power generation efficiency of the hand-cranked generator 2, thereby ensuring the auxiliary energy supply to the heat dissipation fan 1 and the battery, and ensuring the low-energy heat dissipation cooling of the electric motor of the pure electric tractor 3 by the heat dissipation fan 1.

[0041] Under the above setting conditions, when the distance between the traction plate 42 and the pure electric tractor 3 changes, the traction plate 42 will drive the U-shaped rod 61 to move, and the U-shaped rod 61 can drive the slider 62 to move when it moves. Since the axle pin 63 is set on the slider 62, and one end of the inner rod 51 is sleeved with the axle pin 63, the axle pin can use the inner rod 51 to drive the outer tube 52 to move during the movement. Since the outer tube 52 is sleeved with the support shaft 64, and the support shaft 64 is set on the hand-cranked generator 2, the outer tube 52 can rotate with the support shaft 64 as the rotation axis, and can drive the gear plate 65 to rotate around the support shaft 64 during the rotation, so that the gear 66 can drive the drive shaft 21 to rotate, so that the hand-cranked generator 2 can automatically generate electricity using the kinetic energy of the carriage during the braking of the pure electric tractor 3, realize auxiliary energy supply to the battery and the cooling fan 1, effectively ensure the normal heat dissipation of the cooling fan 1 while reducing the energy consumption of the battery, thereby achieving low-energy heat dissipation cooling of the electric motor of the pure electric tractor 3.

[0042] As an embodiment of the present invention, refer to Figure 4 , Figure 5 and Figure 6 The adjusting assembly 7 is arranged on the traction frame 4, and the adjusting assembly 7 includes a hanging member 71, a pull rod 72, an axle pin 73, a collar 74, a connecting rod 75, a rectangular frame 76, a driving block 77 and an adjusting block 78. The hanging member 71 is arranged on one side of the traction plate 42 and includes a connected annular plate 711 and an L-shaped hook 712. The traction plate 42 is provided with a strip opening 421, the pull rod 72 is arranged through the strip opening 421 and is connected to the slider 62, the latch 44 is arranged through the annular plate 711, the axle pin 73 is arranged through the axle pin 74, the connecting rod 75, a rectangular frame 76, a driving block 77 and an adjusting block 78. 3 is arranged on the annular plate 711, the collar 74 is sleeved on the second axle pin 73, the connecting rod 75 is arranged on the collar 74, the rectangular frame 76 is arranged on the connecting rod 75 and sleeved with the pull rod 72, the driving block 77 is arranged inside the rectangular frame 76 and has a driving groove 771 on the surface, the adjusting block 78 is arranged on the pull rod 72 and is connected with the driving groove 771, and the distance between the central axis of the second axle pin 73 and the pure electric tractor 3 is equal to the distance between the central axis of the plug 44 and the pure electric tractor 3;

[0043] The driving groove 771 includes an inner groove 7711 and a groove 7712. The inner groove 7711 is arranged inside the driving block 77. The groove 7712 is arranged on the surface of the driving block 77 and is connected to the groove 7712. The adjusting block 78 includes an adjusting rod 781 and an adjusting ball 782. The adjusting rod 781 is arranged on the pull rod 72 and passes through the groove 7712. The adjusting ball 782 is arranged on the adjusting rod 781 and is slidably arranged inside the inner groove 7711.

[0044] Under the above setting conditions, when the pure electric tractor 3 deviates from the neutral position, due to the resistance of the carriage, the annular plate 711 and the pure electric tractor 3 will rotate relative to each other. When the relative rotation occurs, the annular plate 711 can drive the axle pin 2 73 to revolve around the latch pin 44. The axle pin can drive the collar 74 to move during the revolution. The collar 74 can drive the connecting rod 75 to move during the movement. The connecting rod 75 can drive the rectangular frame 76 to move during the movement. The rectangular frame 76 can drive the adjusting block 78 to move during the movement. During the movement of the adjusting block 78, the notch 7712 will squeeze the adjusting ball 782. When the adjusting ball 782 is squeezed, it will drive the adjusting rod 781 to approach the hand-cranked generator 2. Since the adjusting rod 781 is arranged on the pull rod 72, Here, the adjusting rod 781 can drive the pull rod 72 to approach the hand-cranked generator 2. Since the end of the pull rod 72 is connected to the slider 62, the slider 62 will follow the pull rod 72 and drive the axle pin 1 63 to approach the hand-cranked generator 2. During this process, the axle pin 1 63 will drive the inner rod 51 to move toward the inside of the outer tube 52, reducing the distance between the axle pin 1 63 and the support shaft 64, that is, reducing the power arm of the driving rod 5, so that when the pure electric tractor 3 brakes during a turn, the short-distance movement of the axle pin 1 63 can be used to speed up the driving speed of the outer tube 52 on the toothed plate 65, thereby speeding up the rotation speed of the gear 66, that is, speeding up the power generation speed of the hand-cranked generator 2, thereby reducing the energy consumption of the heat dissipation fan 1 on the battery during heat dissipation, thereby realizing low-energy heat dissipation cooling of the pure electric tractor 3.

[0045] As an embodiment of the present invention, refer to Figure 7 and Figure 8 The toggle assembly 8 includes an elastic telescopic rod 81, which is arranged on the inner outer ring of the arc-shaped opening 651. The free end of the elastic telescopic rod 81 is meshed with the gear 66, and the free end is arranged in a wedge-shaped surface.

[0046] Under the above setting conditions, when the pure electric tractor 3 brakes, the tooth plate 65 rotates forward around the support shaft 64 through the outer tube 52, and the free end of the elastic telescopic rod 81 arranged on the arc-shaped opening 651 can drive the gear 66 to rotate; when the pure electric tractor 3 accelerates, the tooth plate 65 rotates reversely around the support shaft 64 through the outer tube 52, and the wedge-shaped surface of the free end of the elastic telescopic rod 81 arranged on the arc-shaped opening 651 will shrink under the pressure of the gear 66, avoiding the rotation of the driving gear 66, thereby realizing unidirectional rotation of the drive shaft 21, ensuring the normal power generation of the hand-cranked generator 2, that is, realizing auxiliary energy supply to the battery and the heat dissipation fan 1, reducing the energy consumption of the heat dissipation fan 1 when dissipating the heat of the motor, and realizing low-energy heat dissipation cooling of the motor of the pure electric tractor 3.

[0047] Working principle: In order to compensate for the increased energy consumption of the electric motor caused by the acceleration of the pure electric tractor 3 and the kinetic energy loss during braking, refer to Figure 1 , Figure 2 and Figure 3 , through the provided driving assembly 6, the hand-cranked generator 2 can be driven to generate electricity during the braking process of the pure electric tractor 3, and the electric energy generated by the hand-cranked generator 2 can be used to assist the battery and the cooling fan 1 to work, thereby realizing low-energy cooling of the electric motor of the pure electric tractor 3; in order to make up for a part of the electric energy lost in order to maintain the torque and output power of the motor during the turning braking process of the pure electric tractor 3, referring to Figures and Figures, through the provided adjusting assembly 7, the driving force arm of the driving rod 5 can be reduced, that is, when the pure electric tractor 3 brakes during the turning process, the driving shaft 21 on the hand-cranked generator 2 can be driven to rotate quickly through the driving rod 5, thereby accelerating the working efficiency of the hand-cranked generator 2, and further realizing low-energy cooling of the electric motor of the pure electric tractor 3.

[0048] Specific: Refer to Figure 1 , Figure 7 and Figure 8 Since the fixing rod 41 is arranged on the pure electric tractor 3, and the traction plate 42 is sleeved with the fixing rod 41 and plugged with the annular plate 711 through the latch 44, and a carriage is hung on the L-shaped hook 712, due to the heavy weight of the carriage, during the acceleration of the pure electric tractor 3, the carriage has a lag effect, so that the traction plate 42 will move away from the pure electric tractor 3 under the gravity of the carriage, and since the U-shaped rod 61 is arranged on the traction plate 42, the U-shaped rod 61 can be driven to move synchronously during the process of the traction plate 42 moving away from the pure electric tractor 3, and the U-shaped rod 61 can drive the axle pin 63 when moving. When the shaft pin 63 moves, the inner rod 51 can be driven to move. Since the inner rod 51 is sleeved with an outer tube 52, and the outer tube 52 is provided with a support shaft 64 connected to the hand-cranked generator 2, the inner rod 51 can drive the outer tube 52 to rotate with the support shaft 64 as the rotation axis during the movement of the slider 62 through the shaft pin 63, and the outer tube 52 can drive the gear plate 65 to rotate forward during the rotation process. The multiple elastic telescopic rods 81 arranged on the arc-shaped opening 651 can be continuously misaligned with the gear 66 under the action of the wedge-shaped surface of the free end, so as to avoid causing the gear 66 to rotate and make the hand-cranked generator 2 not work;

[0049] Reference Figure 1 , Figure 7 , Figure 8 and Fig. 9When the pure electric tractor 3 brakes, due to the inertia of the carriage, the L-shaped hook 712 can be squeezed through the hooking position to move toward the pure electric tractor 3. Since the latch 44 is plugged with the traction plate 42 and the annular plate 711, the L-shaped hook 712 can be connected to the traction plate 42, so that the L-shaped hook 712 can be easily hooked with the carriage. When the L-shaped hook 712 is squeezed, the traction plate 42 can be squeezed by the latch 44 to move toward the pure electric tractor 3, so that the traction plate 42 is close to the pure electric tractor. When the electric tractor 3 is braked, the tooth plate 65 can rotate in the opposite direction with the support shaft 64 as the rotation axis. During the reverse rotation of the tooth plate 65, the free ends of the plurality of elastic telescopic rods 81 arranged on the arc-shaped opening 651 can continuously mesh with the gear 66, thereby driving the gear 66 to rotate, that is, during the braking process of the electric tractor 3, the drive shaft 21 can rotate in one direction, thereby ensuring the normal operation of the hand-cranked generator 2, and further realizing auxiliary power supply to the battery and the cooling fan 1, so as to achieve low energy consumption heat dissipation cooling of the electric motor of the electric tractor 3 when it is working;

[0050] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6 In the process of turning (deviating from the straight-line driving direction) of the pure electric tractor 3, due to the limitation of the carriage, the annular plate 711 and the pure electric tractor 3 will rotate relative to each other. When the relative rotation occurs, the annular plate 711 will drive the collar 74 to revolve around the latch 44 through the axle pin 2 73. The collar 74 can drive the connecting rod 75 to move during the revolution. The connecting rod 75 can drive the rectangular frame 76 to move during the movement. The rectangular frame 76 can drive the driving block 77 to move during the movement. The driving block 77 can squeeze the adjusting ball 782 under the action of the inner groove 7711 and the notch 7712 during the movement. An adjusting rod 781 is provided between the adjusting ball 782 and the pull rod 72, so when the axle pin 2 73 is away from the initial position, the pull rod 72 can be driven to approach the hand-cranked generator 2. At this time, the pull rod 72 can drive the axle pin 1 63 to approach the hand-cranked generator 2 through the slider 62, and the axle pin 1 63 can drive the inner rod 51 to move toward the inside of the outer tube 52, thereby achieving the effect of reducing the driving force arm of the driving rod 5, thereby further increasing the rotation speed of the driving shaft 21 during the braking process of the pure electric tractor 3, accelerating the power generation efficiency of the hand-cranked generator 2, and further achieving the low-energy heat dissipation cooling effect of the electric motor of the pure electric tractor 3 when it is working.

[0051] 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 low-energy consumption cooling device for a pure electric tractor, comprising a heat dissipation fan (1) and a hand-cranked generator (2), wherein the heat dissipation fan (1) and the hand-cranked generator (2) are used in conjunction with a pure electric tractor (3) and are both arranged on the pure electric tractor (3), and characterized in that: The invention also comprises a traction frame (4), a driving rod (5), a driving assembly (6) and an adjusting assembly (7); the traction frame (4) is arranged on the pure electric tractor (3); the hand-cranked generator (2) is provided with a driving shaft (21); the driving rod (5) is arranged on the hand-cranked generator (2); the driving assembly (6) is arranged on the driving shaft (21) and is connected to the traction frame (4) through the driving rod (5); when the pure electric tractor (3) changes speed, the driving assembly (6) drives the driving shaft (21) to rotate in one direction through the driving rod (5); the adjusting assembly (7) is arranged on the traction frame (4); when the pure electric tractor (3) turns, the adjusting assembly (7) reduces the power arm of the driving rod (5) through the traction frame (4).

2. A low energy consumption cooling device for a pure electric tractor according to claim 1, characterized in that: The traction frame (4) comprises a fixing rod (41), a traction plate (42), a spring (43) and a latch (44); the fixing rod (41) is arranged on the pure electric tractor (3); the traction plate (42) is sleeved on the fixing rod (41); the spring (43) is sleeved on the fixing rod (41) and its two ends are respectively connected to the traction plate (42) and the fixing rod (41); the latch (44) is arranged to penetrate the traction plate (42); and the stiffness of the spring (43) is arranged to increase from the front end to the rear end of the pure electric tractor (3).

3. A low energy consumption cooling device for a pure electric tractor according to claim 2, characterized in that: The driving assembly (6) comprises a U-shaped rod (61), a slider (62), an axle pin (63), a support shaft (64), a toothed plate (65) and a gear (66); the U-shaped rod (61) is arranged on the traction plate (42); the slider (62) is sleeved on the U-shaped rod (61); the axle pin (63) is arranged on the slider (62); the support shaft (64) is arranged on the hand-cranked generator (2); the driving rod (5) comprises an inner rod (51) and an outer tube (52); the inner rod (51) and the outer tube (52) are sleeved and arranged The inner rod (51) is arranged at one end outside the outer tube (52) and is sleeved with an axle pin (63). The outer tube (52) is connected to a support shaft (64). The gear (66) is arranged on the drive shaft (21). The toothed plate (65) is arranged at the end of the outer tube (52) and has an arc-shaped opening (651) on its surface. A shifting assembly (8) is arranged inside the arc-shaped opening (651). When the outer tube (52) rotates with the support shaft (64) as the rotation axis, the shifting assembly (8) drives the drive shaft (21) to rotate through the gear (66).

4. A low energy consumption cooling device for a pure electric tractor according to claim 3, characterized in that: The adjustment assembly (7) comprises a hanging member (71), a pull rod (72), a second axle pin (73), a collar (74), a connecting rod (75), a rectangular frame (76), a driving block (77) and an adjustment block (78); the hanging member (71) is arranged on one side of the traction plate (42) and comprises an annular plate (711) and an L-shaped hook (712) connected to each other; a strip-shaped opening (421) is provided on the traction plate (42); the pull rod (72) is arranged to pass through the strip-shaped opening (421) and is connected to the slider (62); the latch (44) is arranged to pass through the annular plate (711); the second axle pin (73) is arranged on the annular plate ( The annular plate (711) is provided on the second shaft pin (73), the connecting rod (75) is provided on the annular ring (74), the rectangular frame (76) is provided on the connecting rod (75) and is sleeved with the pull rod (72), the driving block (77) is provided inside the rectangular frame (76) and has a driving groove (771) on its surface, the adjusting block (78) is provided on the pull rod (72) and is connected with the driving groove (771), and when the annular plate (711) rotates relative to the pure electric tractor (3), the adjusting block (78) reduces the length of the inner rod (51) outside the outer tube (52) through the driving groove (771).

5. A low energy consumption cooling device for a pure electric tractor according to claim 3, characterized in that: The toggle assembly (8) comprises an elastic telescopic rod (81), which is arranged on the inner outer ring of the arc-shaped opening (651), and the free end of the elastic telescopic rod (81) is meshed with the gear (66), and the free end is arranged in a wedge-shaped surface.

6. A low energy consumption cooling device for a pure electric tractor according to claim 4, characterized in that: The driving groove (771) includes an inner groove (7711) and a notch (7712), wherein the inner groove (7711) is arranged inside the driving block (77), and the notch (7712) is arranged on the surface of the driving block (77) and is connected to the notch (7712). The adjusting block (78) includes an adjusting rod (781) and an adjusting ball (782), wherein the adjusting rod (781) is arranged on the pull rod (72) and passes through the notch (7712), and the adjusting ball (782) is arranged on the adjusting rod (781) and is slidably arranged inside the inner groove (7711).

7. A low energy consumption cooling device for a pure electric tractor according to claim 4, characterized in that: The distance between the central axis of the second axle pin (73) and the pure electric tractor (3) is equal to the distance between the central axis of the latch pin (44) and the pure electric tractor (3).

8. A low energy consumption cooling device for a pure electric tractor according to claim 4, characterized in that: The distance between the support shaft (64) and the shaft pin 1 (63) is smaller than the distance between the support shaft (64) and the right end of the outer tube (52).

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