Energy-saving electric fork-lift truck asynchronous motor heat dissipation device

Abstract

The application relates to the technical field of motor heat dissipation, and discloses an energy-saving electric forklift asynchronous motor heat dissipation device, which comprises a motor body arranged on a forklift body, a cooling water tank is fixed on one side of the motor body, a water pump is arranged on the outer surface of the cooling water tank, a water supply groove is arranged on the inner wall of the cooling water tank, a water supply opening is arranged on one side of the water supply groove, and a cooling water pipe for heat dissipation of the motor body is arranged on the inner wall of the motor body; a rotating shaft is arranged on the motor body, a heat dissipation fan is fixed on the end of the rotating shaft, and a plurality of groups of ventilation holes are arranged on one side of the motor body; when the temperature of the motor body rises and heat dissipation is needed, the liquid in the liquid tank expands to drive the first piston plate to move, the first piston plate movement opens the cooling water pipe and opens the ventilation holes, so that the heat dissipation can be carried out in the combined mode of air cooling and water cooling, and the heat dissipation effect of the motor body is improved.

Description

Technical Field

[0001] This invention relates to the field of motor heat dissipation technology, specifically to an energy-saving heat dissipation device for an asynchronous motor in an electric forklift. Background Technology

[0002] Electric forklifts are forklifts that operate using electricity, mostly powered by batteries, and are a type of energy-saving new energy equipment. Electric forklifts require an asynchronous motor for operation, which is typically installed inside the forklift. During operation, the asynchronous motor's temperature rises, necessitating heat dissipation measures to ensure its proper functioning.

[0003] Currently, there are generally two methods for cooling asynchronous motors: air cooling and water cooling. Asynchronous motors typically choose one of these methods. When using air cooling, the asynchronous motor has its own built-in cooling fan. When using water cooling, the asynchronous motor is connected to cooling water pipes, using cooling water to dissipate heat from the inside of the motor. However, both methods generally involve cooling the asynchronous motor from the moment it starts up. Since the temperature rise of an asynchronous motor varies depending on the weather (e.g., in winter), it needs to be kept at a certain temperature before reaching the required cooling temperature to better and faster enter its operating state. This requires warming up the asynchronous motor. If cooling is initiated immediately upon startup, it increases the warm-up time, prolongs the time the asynchronous motor can operate at low temperatures, increases wear and tear, and ultimately reduces the lifespan of the asynchronous motor. Summary of the Invention

[0004] This invention provides an energy-saving cooling device for an asynchronous motor in an electric forklift. When the motor body is first started and cooling is not required, the ventilation holes and cooling water pipes are closed, and no cooling treatment is performed at this time. When cooling is required, the liquid inside the filling tank expands and pushes the first piston plate to move. The movement of the first piston plate opens the cooling water pipes and the ventilation holes, thereby enabling heat dissipation from the inside of the motor body. This solves the problem mentioned in the background art that if cooling is performed as soon as the asynchronous motor starts, it will increase the warm-up time of the asynchronous motor, prolong the time the asynchronous motor can work at low temperatures, increase the wear and tear of the asynchronous motor, and thus reduce the service life of the asynchronous motor.

[0005] The present invention provides the following technical solution: an energy-saving electric forklift asynchronous motor cooling device, comprising a motor body mounted on the forklift body, an installation chamber for mounting the motor body on the forklift body, a cooling water tank fixed on one side of the motor body, a water pump mounted on the outer surface of the cooling water tank, a water supply pipe connected to the output end of the water pump, a water supply groove formed on the inner wall of the cooling water tank, a water supply outlet formed on one side of the water supply groove, and a cooling water pipe for cooling the motor body on the inner wall of the motor body, one end of the cooling water pipe being connected to the interior of the cooling water tank;

[0006] The motor body is provided with a rotating shaft, and a cooling fan is fixed to the end of the rotating shaft. A first sliding groove is provided on the inner wall of the motor body. A sealing strip is elastically connected in the first sliding groove. A first through groove for connecting the water supply port and the cooling water pipe is provided on the sealing strip. Several sets of ventilation holes are provided on one side of the motor body. Sealing plates are elastically provided inside the several sets of ventilation holes.

[0007] As an optional solution of the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, a partition is fixed inside the first slide groove, a filling liquid tank is provided on one side of the partition, a first piston plate is slidably arranged inside the filling liquid tank, a connecting rod is fixed between the first piston plate and the sealing strip, a first spring is fixed between the first piston plate and the partition, a fifth spring is provided on one side of the filling liquid tank, and a second piston plate is fixed to the end of the fifth spring.

[0008] As an optional solution for the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, a first conductive sheet is fixed on the outer surface of the sealing strip, a second conductive sheet is fixed on the inner wall of the first sliding groove, and the water pump is energized through the contact between the first conductive sheet and the second conductive sheet.

[0009] As an optional solution of the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, the motor body has a second sliding groove inside, the sealing plate is slidably disposed in the second sliding groove, the sealing plate has a second through groove for guiding the ventilation hole, the end of the sealing plate is fixed with a sliding rod, the sealing strip has an inclined groove inside for the sliding rod to slide, and a second spring is provided between the inner wall of the second sliding groove and the outer surface of the sealing plate.

[0010] As an optional solution for the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, a movable block is slidably arranged inside the water supply tank, and a No. 3 spring is arranged between the movable block and the inner wall of the water supply tank. Several sets of first heat dissipation fins are arranged at equal intervals inside the cooling water tank, and second heat dissipation fins are elastically connected to the several sets of first heat dissipation fins. The ends of the second heat dissipation fins are located on the outside of the cooling water tank.

[0011] As an optional solution of the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, a first trapezoidal block is fixed on the surface of the moving block, a second trapezoidal block that abuts against the first trapezoidal block is fixed on one outer surface of the second heat sink, a protrusion is fixed on the other outer surface of the second heat sink, a limiting groove for the protrusion to slide is opened inside the cooling water tank, and a No. 4 spring is fixed between the protrusion and the limiting groove.

[0012] As an optional solution for the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, the second heat sink has a storage groove inside, a movable block is elastically connected in the storage groove, and several sets of third heat sinks are fixed on the outer surface of the movable block.

[0013] As an optional solution of the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, a plug rod for inserting into the second heat dissipation fin is fixed on the first heat dissipation fin, a limit guide groove is opened at the end of the plug rod, a protruding post is fixed on the surface of the movable block, a limit ball is fixed at the end of the protruding post, and the limit ball is slidably disposed in the limit guide groove.

[0014] As an optional solution for the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, an inclined air guide groove is provided on the inner wall of the motor body, and a ventilation pipe is connected to the top of the inclined air guide groove. A ventilation slot is provided inside the cooling water tank, and the end of the ventilation pipe is connected to the ventilation slot. A groove for dissipating heat from the top of the second heat sink is provided on the top of the cooling water tank. A plurality of air outlets connected to the groove are provided on one side of the ventilation slot. A sealing block for controlling the opening and closing of the ventilation slot is elastically provided inside the cooling water tank.

[0015] As an optional solution for the energy-saving electric forklift asynchronous motor heat dissipation device of the present invention, the interior of the cooling water tank is provided with a third sliding groove for the sealing block to slide, a transmission rod is fixed to one side of the moving block, a push-pull rod is fixed to the end of the transmission rod, the end of the push-pull rod is fixedly connected to the sealing block, and a fourth sliding groove is provided on one side of the third sliding groove for the push-pull rod and the transmission rod to move.

[0016] The present invention has the following beneficial effects:

[0017] 1. In this energy-saving electric forklift asynchronous motor cooling device, when the motor body temperature has not reached the cooling temperature, the ventilation holes and cooling water pipes are closed, and there is no need to cool the motor body through the ventilation holes and cooling water pipes. When the motor body needs to cool down, that is, when the internal temperature of the motor body exceeds the normal temperature, the liquid inside the filling tank expands, which pushes the first piston plate to move. The movement of the first piston plate drives the sealing strip and sealing plate to move, so that the first channel connects the water supply port and the cooling water tank, and the second channel opens the ventilation hole. Thus, the motor body is cooled by a combination of air cooling and water cooling. Through the above process, the cooling temperature of the motor body can be adapted according to the temperature demand, instead of constantly cooling the motor body, which helps to reduce the wear of the motor body. Moreover, the combination of air cooling and water cooling improves the cooling efficiency and helps to increase the service life of the motor body.

[0018] 2. In this energy-saving electric forklift asynchronous motor cooling device, when the motor body is cooled by water cooling, the first heat sink absorbs the heat of the cooling water and transfers it to the second heat sink, which then dissipates the heat, thus facilitating the cooling water cooling process. When the cooling water enters the water supply tank, it pushes the moving block to move inside the water supply tank until the water supply port is opened. As the moving block moves, it drives the second heat sink to move upward, extending the second heat sink to the outside of the cooling water tank. At the same time, when the second heat sink extends, the internal third heat sink can be extended, thereby increasing the heat dissipation area and further improving the cooling effect of the cooling water, which is beneficial for cooling the motor body.

[0019] 3. In this energy-saving electric forklift asynchronous motor cooling device, when cooling water enters the water supply tank and pushes the moving block to move inside the water supply tank, the moving block drives the push-pull rod to move through the transmission rod. The push-pull rod moves and pulls the sealing block to move, causing the sealing block to move away from the ventilation slot and open the ventilation slot. At this time, the cold air blown out by the cooling fan enters the ventilation slot through the inclined air guide and ventilation pipe, and blows towards the second and third heat sinks through the air outlet, thereby conveniently and quickly dissipating the heat around the second and third heat sinks, increasing the heat dissipation efficiency of the second and third heat sinks. At the same time, the cooling fan blows cold air to the second and third heat sinks for cooling, increasing the utilization efficiency of the cooling fan and realizing two uses for one fan, further improving the heat dissipation efficiency of the motor body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection structure between the motor body and the forklift body of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the motor body and cooling water tank of the present invention.

[0022] Figure 3 This is a top view cross-sectional structural diagram of the motor body and cooling water tank of the present invention.

[0023] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 For the present invention Figure 3 Enlarged view of section B in the middle.

[0025] Figure 6 This is a longitudinal cross-sectional view of the cooling water tank section of the present invention.

[0026] Figure 7 For the present invention Figure 6 Enlarged view of point C.

[0027] Figure 8 For the present invention Figure 6 Enlarged view of point D in the middle.

[0028] Figure 9 This is a top structural cross-sectional view of the cooling water tank section of the present invention.

[0029] Figure 10 For the present invention Figure 9 Enlarged view of point E in the middle.

[0030] Figure 11 This is a schematic diagram of the inclined air guide groove inside the motor body in this invention.

[0031] Figure 12 For the present invention Figure 10 A cross-sectional view of the central sealing block section.

[0032] In the diagram: 1. Forklift body; 2. Motor body; 3. Mounting chamber; 4. Cooling water tank; 5. Water pump; 6. Water supply pipe; 7. Water supply tank; 8. Water inlet; 9. Cooling water pipe; 10. Shaft; 11. Cooling fan; 12. First slide groove; 13. Sealing strip; 14. First through groove; 15. Ventilation hole; 16. Sealing plate; 17. Partition plate; 18. Filling liquid tank; 19. First piston plate; 20. Connecting rod; 21. Spring No. 1; 22. First conductive plate; 23. Second conductive plate; 24. Second slide groove; 25. Second through groove; 26. Sliding rod; 27. Inclined groove; 28. Spring No. 2; 29. ​​Moving... 30. Moving block; 31. Spring No. 3; 32. First heat sink; 33. Second heat sink; 34. First trapezoidal block; 35. Protrusion; 36. Limiting groove; 37. Spring No. 4; 38. Storage groove; 39. Movable block; 40. Third heat sink; 41. Insert rod; 42. Limiting guide groove; 43. Protrusion; 44. Limiting ball; 45. Inclined air guide groove; 46. Ventilation pipe; 47. Ventilation groove; 48. Groove; 49. Air outlet; 50. Sealing block; 51. Third sliding groove; 52. Transmission rod; 53. Push-pull rod; 54. Fourth sliding groove; 55. Spring No. 5; 56. Second piston plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1, please refer to Figures 1-12 An energy-saving electric forklift asynchronous motor cooling device includes a motor body 2 mounted on the forklift body 1, an installation chamber 3 for mounting the motor body 2 on the forklift body 1, a cooling water tank 4 fixed on one side of the motor body 2, a water pump 5 mounted on the outer surface of the cooling water tank 4, a water supply pipe 6 connected to the output end of the water pump 5, a water supply trough 7 opened on the inner wall of the cooling water tank 4, a water supply port 8 opened on one side of the water supply trough 7, and a cooling water pipe 9 for cooling the motor body 2 on the inner wall of the motor body 2, one end of the cooling water pipe 9 being connected to the interior of the cooling water tank 4.

[0035] The motor body 2 is provided with a rotating shaft 10, and a cooling fan 11 is fixed at the end of the rotating shaft 10. A first sliding groove 12 is provided on the inner wall of the motor body 2. A sealing strip 13 is elastically connected in the first sliding groove 12. A first through groove 14 for connecting the water supply port 8 and the cooling water pipe 9 is provided on the sealing strip 13. Several sets of ventilation holes 15 are provided on one side of the motor body 2. A sealing plate 16 is elastically provided inside the several sets of ventilation holes 15.

[0036] A partition 17 is fixed inside the first chute 12. A filling liquid tank 18 is provided on one side of the partition 17. A first piston plate 19 is slidably arranged inside the filling liquid tank 18. A connecting rod 20 is fixed between the first piston plate 19 and the sealing strip 13. A first spring 21 is fixed between the first piston plate 19 and the partition 17. A fifth spring 55 is provided on one side of the filling liquid tank 18. A second piston plate 56 is fixed to the end of the fifth spring 55.

[0037] A first conductive sheet 22 is fixed on the outer surface of the sealing strip 13, and a second conductive sheet 23 is fixed on the inner wall of the first sliding groove 12. The water pump 5 is energized through the contact between the first conductive sheet 22 and the second conductive sheet 23.

[0038] The motor body 2 has a second sliding groove 24 inside, and the sealing plate 16 is slidably disposed in the second sliding groove 24. The sealing plate 16 has a second through groove 25 for guiding the ventilation hole 15. The end of the sealing plate 16 is fixed with a sliding rod 26. The sealing strip 13 has an inclined groove 27 for sliding the sliding rod 26 inside. A second spring 28 is disposed between the inner wall of the second sliding groove 24 and the outer surface of the sealing plate 16.

[0039] In this technical solution, before the internal temperature of the motor body 2 reaches the temperature requiring heat dissipation, the ventilation hole 15 and the water inlet 8 are closed, and air cooling and water cooling are not required. As the motor body 2 operates, its temperature rises. When it reaches the temperature requiring heat dissipation, the liquid filled in the filling tank 18, which has temperature-sensing properties and can expand and deform when the temperature rises and recover when the temperature drops, is used. Specifically, it can be mercury. After the temperature rises to the temperature requiring heat dissipation, the mercury expands inside the filling tank, such as... Figure 3 and Figure 4 As shown, pushing the first piston plate 19 to the right moves the connecting rod 20 to the right, compressing and storing the first spring 21. The connecting rod 20 then pushes the sealing strip 13 to the right within the first slide groove 12. The sealing strip 13 then moves the first through groove 14 to the right, connecting the water supply port 8 and the cooling water pipe 9. Simultaneously, as... Figure 5As shown, the sealing strip 13 moves to the right, causing the sliding rod 26 to slide inside the inclined groove 27, so that the inclined groove 27 and the sliding rod 26 come into contact, causing the sliding rod 26 to move downward. The downward movement of the sliding rod 26 causes the sealing plate 16 to move downward. The downward movement of the sealing plate 16 causes the second through groove 25 to move downward, so that the second through groove 25 is connected to the ventilation hole 15. The downward movement of the sealing plate 16 compresses the second spring 28, so that the second spring 28 stores force. At this time, when the rotating shaft 10 of the motor body 2 rotates, the rotating shaft 10 drives the cooling fan 11 to rotate, so that the ventilation hole 15 can ventilate and allow air to circulate, thereby cooling the motor body 2.

[0040] When the sealing strip 13 moves to the right, it drives the first conductive piece 22 to move to the right. The first conductive piece 22 moves to the right and contacts the second conductive piece 23, which energizes the water pump 5. At this time, the first channel 14, the water supply port 8 and the cooling water pipe 9 are connected. The water pump 5 draws out the cooling water inside the cooling water tank 4. The water supply pipe 6, the water supply tank 7, the water supply port 8, the first channel 14 and the cooling water pipe 9 form a cooling water circulation channel with the cooling water tank 4. The circulating cooling water carries away the heat inside the motor body 2, thereby water cooling the motor body 2.

[0041] After the motor body 2 is turned off, when the temperature does not need to be dissipated, the temperature of the motor body 2 decreases, causing the mercury to shrink and recover inside the filling slot. At this time, the first spring 21 releases its force, causing the first piston plate 19 to move to the left and reset. The first piston plate 19 moving to the left and resetting causes the sealing strip 13 to move to the left and reset. The sealing strip 13 moving to the left and resetting first separates the first conductive piece 22 and the second conductive piece 23, causing the water pump 5 to be de-energized. The first through slot 14 is misaligned with the water supply port 8 and the cooling water pipe 9, stopping the delivery of cooling water. At this time, the sealing strip 13 continues to move to the left and reset. The top of the slide rod 26 loses the contact of the inclined slot 27, and the second spring 28 releases its force, causing the slide rod 26 to move upward and reset. At the same time, the sealing plate 16 moves upward and reset, causing the second through slot 25 to be misaligned with the ventilation hole 15, sealing the ventilation hole 15 and completing the reset action.

[0042] In this technical solution, when the first piston plate 19 is pushed to the point where it cannot move, if the motor body 2 continues to rise to a certain temperature, the mercury inside the filling liquid tank 18 will push the second piston plate 56 to move and compress the No. 5 spring 55 to store force, thus completing the pressure relief work on the filling liquid tank 18. The first piston plate 19 and the second piston plate 56 are both sealed to the filling liquid tank 18, the sealing strip 13 is sealed to the first slide groove 12, and the sealing plate 16 is sealed to the second slide groove 24.

[0043] In Example 2, when cooling is achieved through circulating cooling water, the cooling water temperature varies with operating time. The longer the operating time, the more heat the cooling water absorbs, resulting in a higher cooling water temperature. If the cooling water temperature continues to rise, using this high-temperature cooling water to dissipate heat from the motor body 2 will lead to poor heat dissipation, thus hindering the cooling of the motor body 2. To address this issue, this example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-12 The water supply tank 7 has a sliding block 29 inside, and a No. 3 spring 30 is provided between the sliding block 29 and the inner wall of the water supply tank 7. The cooling water tank 4 has several sets of first heat sinks 31 arranged at equal intervals inside, and several sets of second heat sinks 32 are elastically connected to the first heat sinks 31. The ends of the second heat sinks 32 are located on the outside of the cooling water tank 4.

[0044] A first trapezoidal block 33 is fixed on the surface of the movable block 29. A second trapezoidal block 34 that abuts against the first trapezoidal block 33 is fixed on one side of the outer surface of the second heat sink 32. A protrusion 35 is fixed on the other side of the outer surface of the second heat sink 32. A limiting groove 36 for the protrusion 35 to slide is opened inside the cooling water tank 4. A No. 4 spring 37 is fixed between the protrusion 35 and the limiting groove 36.

[0045] The second heat sink 32 has a storage groove 38 inside, and a movable block 39 is elastically connected inside the storage groove 38. Several sets of third heat sinks 40 are fixed on the outer surface of the movable block 39.

[0046] A rod 41 for inserting into the second heat sink 32 is fixed on the first heat sink 31. A limiting guide groove 42 is opened at the end of the rod 41. A protrusion 43 is fixed on the surface of the movable block 39. A limiting ball 44 is fixed at the end of the protrusion 43. The limiting ball 44 is slidably disposed in the limiting guide groove 42.

[0047] In this technical solution, the heat of the cooling water inside the cooling water tank 4 is absorbed by the first heat sink 31 and the second heat sink 32, facilitating the cooling water to be cooled by the first heat sink 31 and the second heat sink 32; when the water pump 5 supplies water to the water supply tank 7 through the water pipe 6, the cooling water first fills the water supply tank 7, making the water inside the water supply tank 7 increase, and at the same time pushing the moving block 29 to move to the left in the water supply tank 7, the third spring 30 is compressed and stored (e.g. Figure 5 As shown), until the moving block 29 moves to the left side of the water supply port 8, cooling water is discharged through the water supply port 8 for water cooling. When the moving block 29 moves to the left, as... Figure 6 and Figure 7As shown, at this time, the perspective of the moving block 29 is that the moving block 29 moves to the right. The moving block 29 moves to the right, which drives the first trapezoidal block 33 to move to the right, so that the first trapezoidal block 33 abuts against the second trapezoidal block 34, causing the second trapezoidal block 34 to move upward. Since the second heat sink 32 is slidably connected to the first heat sink 31, the second trapezoidal block 34 can drive the second heat sink 32 to move upward. The upward movement of the second heat sink 32 drives the protrusion 35 to move upward. The protrusion 35 pulls the fourth spring 37, so that the fourth spring 37 is stretched and stores force. The upward movement of the second heat sink 32 extends the end to the outside of the cooling water tank 4, thereby increasing the exposed area and increasing the heat dissipation speed.

[0048] When the second heat sink 32 moves upward, it drives the third heat sink 40 and the movable block 39 to move upward. The upward movement of the movable block 39 drives the protrusion 43 to move upward, and the protrusion 43 drives the limiting ball 44 to move upward. Due to the resistance of the limiting guide groove 42, the limiting ball 44 drives the protrusion 43 to move to the left (e.g., Figure 7 As shown), the protruding post 43 moves to the left, causing the movable block 39 to move to the left. The movable block 39 moves to the left, causing the third heat sink 40 to move to the left, so that the third heat sink 40 extends out of the storage groove 38, increasing the heat dissipation area and improving the heat dissipation efficiency of the heat sink.

[0049] During reset, water pump 5 stops working, spring 30 releases its force, and moving block 29 is reset. When moving block 29 is reset, second trapezoidal block 34 loses the resistance of first trapezoidal block 33, and spring 37 releases its force, causing second heat sink 32 to move downwards and reset. As second heat sink 32 moves downwards and resets, insert rod 41 is inserted into second heat sink 32 again. At this time, slide rod 26 drives limit ball 44 to slide in the opposite direction in limit guide groove 42, causing third heat sink 40 to be retracted into storage groove 38, completing the reset of second heat sink 32 and third heat sink 40. This is beneficial for reducing the exposed length of second heat sink 32 and third heat sink 40 when cooling is not required, thus increasing protection.

[0050] In Example 3, because the heat dissipated by the second heat sink 32 and the third heat sink 40 is generally concentrated in the groove 48 during heat dissipation, the temperature around the second heat sink 32 and the third heat sink 40 is relatively high, thus affecting the heat dissipation efficiency of the second heat sink 32 and the third heat sink 40. The heat dissipation of the second heat sink 32 and the third heat sink 40 is relatively slow, which may affect the heat dissipation efficiency of the motor body 2. To address this problem, this example is an improvement made based on Example 2. For details, please refer to Example 2. Figures 1-12An inclined air guide groove 45 is provided on the inner wall of the motor body 2. A ventilation pipe 46 is connected to the top of the inclined air guide groove 45. A ventilation groove 47 is provided inside the cooling water tank 4. The end of the ventilation pipe 46 is connected to the ventilation groove 47. A groove 48 for dissipating heat from the top of the second heat sink 32 is provided on the top of the cooling water tank 4. Several sets of air outlets 49 connected to the groove 48 are provided on one side of the ventilation groove 47. A sealing block 50 for controlling the opening and closing of the ventilation groove 47 is elastically provided inside the cooling water tank 4.

[0051] The interior of the cooling water tank 4 is provided with a third slide groove 51 for the sealing block 50 to slide. A transmission rod 52 is fixed on one side of the moving block 29. A push-pull rod 53 is fixed at the end of the transmission rod 52. The end of the push-pull rod 53 is fixedly connected to the sealing block 50. A fourth slide groove 54 is provided on one side of the third slide groove 51 for the push-pull rod 53 and the transmission rod 52 to move.

[0052] In this technical solution, when the cooling water pushes the moving block 29 to move, such as Figure 12 As shown, the moving block 29 moves to the left. At this time, the moving block 29 moves to the left, which drives the transmission rod 52 to move to the left. The transmission rod 52 drives the push-pull rod 53 to move to the left. The push-pull rod 53 drives the sealing block 50 to move to the left. The sealing block 50 moves to the left, opening the ventilation slot 47. At this time, since the inclined air guide slot 45 is set in front of the cooling fan 11 and is inclined, the cold air blown out by the cooling fan 11 can enter the inclined air guide slot 45, and then enter the ventilation pipe 46 through the inclined air guide slot 45. Then, it enters the ventilation slot 47 through the ventilation pipe 46 and blows through the air outlet 49 to the second heat sink 32 and the third heat sink 40 inside the groove 48. This makes it convenient to use the cold air blown out by the cooling fan 11 to dissipate heat from the second heat sink 32 and the third heat sink 40. This not only increases the heat dissipation efficiency of the second heat sink 32 and the third heat sink 40, but also increases the utilization efficiency of the cold air blown out by the cooling fan 11, realizing two uses for one fan and further improving the heat dissipation efficiency of the motor body 2.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An energy-saving electric forklift asynchronous motor cooling device, comprising a motor body (2) mounted on a forklift body (1), wherein the forklift body (1) is provided with a mounting chamber (3) for mounting the motor body (2), characterized in that: A cooling water tank (4) is fixed on one side of the motor body (2). A water pump (5) is provided on the outer surface of the cooling water tank (4). A water supply pipe (6) is connected to the output end of the water pump (5). A water supply trough (7) is provided on the inner wall of the cooling water tank (4). A water supply port (8) is provided on one side of the water supply trough (7). A cooling water pipe (9) for dissipating heat from the motor body (2) is provided on the inner wall of the motor body (2). One end of the cooling water pipe (9) is connected to the interior of the cooling water tank (4). The motor body (2) is provided with a rotating shaft (10), and a cooling fan (11) is fixed at the end of the rotating shaft (10). The inner wall of the motor body (2) is provided with a first sliding groove (12), and a sealing strip (13) is elastically connected in the first sliding groove (12). The sealing strip (13) is provided with a first through groove (14) for connecting the water supply port (8) and the cooling water pipe (9). A number of ventilation holes (15) are provided on one side of the motor body (2), and a sealing plate (16) is elastically provided inside the number of ventilation holes (15).

2. The energy-saving electric forklift asynchronous motor cooling device according to claim 1, characterized in that: A partition (17) is fixed inside the first chute (12). A filling liquid tank (18) is provided on one side of the partition (17). A first piston plate (19) is slidably arranged inside the filling liquid tank (18). A connecting rod (20) is fixed between the first piston plate (19) and the sealing strip (13). A first spring (21) is fixed between the first piston plate (19) and the partition (17). A fifth spring (55) is provided on one side of the filling liquid tank (18). A second piston plate (56) is fixed to the end of the fifth spring (55).

3. The energy-saving electric forklift asynchronous motor cooling device according to claim 2, characterized in that: The outer surface of the sealing strip (13) is fixed with a first conductive sheet (22), and the inner wall of the first groove (12) is fixed with a second conductive sheet (23). The water pump (5) is powered through the contact between the first conductive sheet (22) and the second conductive sheet (23).

4. The energy-saving electric forklift asynchronous motor cooling device according to claim 3, characterized in that: The motor body (2) has a second sliding groove (24) inside. The sealing plate (16) is slidably disposed in the second sliding groove (24). The sealing plate (16) has a second through groove (25) for guiding the ventilation hole (15). The end of the sealing plate (16) is fixed with a sliding rod (26). The sealing strip (13) has an inclined groove (27) inside for sliding the sliding rod (26). A second spring (28) is provided between the inner wall of the second sliding groove (24) and the outer surface of the sealing plate (16).

5. The energy-saving electric forklift asynchronous motor cooling device according to claim 4, characterized in that: The water supply tank (7) is slidably provided with a moving block (29), and a No. 3 spring (30) is provided between the moving block (29) and the inner wall of the water supply tank (7). The cooling water tank (4) is provided with several sets of first heat sinks (31) arranged at equal intervals. The several sets of first heat sinks (31) are elastically connected with second heat sinks (32), and the ends of the second heat sinks (32) are provided on the outside of the cooling water tank (4).

6. The energy-saving electric forklift asynchronous motor cooling device according to claim 5, characterized in that: The surface of the movable block (29) is fixed with a first trapezoidal block (33), and a second trapezoidal block (34) that abuts against the first trapezoidal block (33) is fixed on one side of the outer surface of the second heat sink (32). A protrusion (35) is fixed on the other side of the outer surface of the second heat sink (32). A limiting groove (36) for sliding of the protrusion (35) is opened inside the cooling water tank (4). A No. 4 spring (37) is fixed between the protrusion (35) and the limiting groove (36).

7. The energy-saving electric forklift asynchronous motor cooling device according to claim 6, characterized in that: The second heat sink (32) has a storage groove (38) inside, and a movable block (39) is elastically connected inside the storage groove (38). Several sets of third heat sinks (40) are fixed on the outer surface of the movable block (39).

8. The energy-saving electric forklift asynchronous motor cooling device according to claim 7, characterized in that: The first heat sink (31) is fixed with a plug (41) for inserting into the second heat sink (32). The end of the plug (41) is provided with a limiting guide groove (42). The surface of the movable block (39) is fixed with a protrusion (43). The end of the protrusion (43) is fixed with a limiting ball (44). The limiting ball (44) is slidably disposed in the limiting guide groove (42).

9. The energy-saving electric forklift asynchronous motor cooling device according to claim 8, characterized in that: An inclined air guide groove (45) is provided on the inner wall of the motor body (2). A ventilation pipe (46) is connected to the top of the inclined air guide groove (45). A ventilation groove (47) is provided inside the cooling water tank (4). The end of the ventilation pipe (46) is connected to the ventilation groove (47). A groove (48) for dissipating heat from the top of the second heat sink (32) is provided on the top of the cooling water tank (4). A number of air outlets (49) connected to the groove (48) are provided on one side of the ventilation groove (47). A sealing block (50) for controlling the opening and closing of the ventilation groove (47) is elastically provided inside the cooling water tank (4).

10. The energy-saving electric forklift asynchronous motor cooling device according to claim 9, characterized in that: The cooling water tank (4) has a third sliding groove (51) for the sealing block (50) to slide inside. A transmission rod (52) is fixed on one side of the moving block (29). A push-pull rod (53) is fixed at the end of the transmission rod (52). The end of the push-pull rod (53) is fixedly connected to the sealing block (50). A fourth sliding groove (54) is provided on one side of the third sliding groove (51) for the push-pull rod (53) and the transmission rod (52) to move.

Images