Flat type electric forklift motor

Abstract

The invention relates to a flat type electric forklift motor which comprises a motor shell, a rotor is arranged at the position of the central axis in the motor shell, a stator matched with the rotor is arranged on the inner wall of the motor shell, a rotating shaft is connected to the position, towards the axis, of the rotor, fan blades are connected to the surface of one end of the rotating shaft, and an annular heat dissipation cavity is formed in the wall of the motor shell. The end, close to the fan blades, of the annular heat dissipation cavity is sealed, the other end of the annular heat dissipation cavity is open, a negative pressure part is arranged on the motor shell, a plurality of arc-shaped movable plates are arranged in the annular heat dissipation cavity in a circular array mode, and a plurality of first semiconductor chilling plates are installed on the inner sides of the arc-shaped movable plates. And a plurality of heat conduction layers corresponding to the semiconductor chilling plates I are connected to the part, close to the rotating shaft, of the annular heat dissipation cavity. According to the motor shell, the side wall of the motor shell and the inner cavity of the motor shell can be effectively cooled, a good cooling effect on the motor body is achieved, the situation that the overall temperature rise of the motor is too high or the local temperature rise of the motor is too high is avoided, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a flat electric forklift motor. Background Art

[0002] Flat electric forklift motors are used as power sources in electric forklifts. They can provide sufficient power output in a limited space. They are suitable for installation in space-constrained application scenarios, such as electric forklifts and other industrial vehicles.

[0003] A lot of heat is generated during the continuous operation of the electric forklift motor. Generally, the existing technology only dissipates the heat of the electric forklift motor naturally or locally dissipates the heat inside the electric forklift motor through a fan. A lot of heat is accumulated on the wall of the electric forklift motor and cannot be dissipated, resulting in excessive overall temperature rise of the motor or excessive local temperature rise, which will not only reduce the service life of the motor, but may even cause serious deformation of the motor structural components, endangering the safe operation of the motor. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a flat electric forklift motor, and the specific technical solution is as follows:

[0005] A flat electric forklift motor includes a motor housing, a rotor is provided at the central axis inside the motor housing, a stator is provided on the inner wall of the motor housing to match the rotor, the rotor is connected to a rotating shaft at the axis, a fan blade is connected to the surface of one end of the rotating shaft, an annular heat dissipation cavity is provided inside the wall of the motor housing, the annular heat dissipation cavity is sealed at one end close to the fan blade, and is opened at the other end, a negative pressure portion is provided on the motor housing, and external air is guided from the sealed portion of the annular heat dissipation cavity to the opening through the negative pressure portion, a plurality of arc-shaped movable plates are provided in a circular array inside the annular heat dissipation cavity, a plurality of semiconductor cooling plates are installed on the inner side of the arc-shaped movable plates, and a plurality of heat-conducting layers corresponding to the semiconductor cooling plates are connected to the annular heat dissipation cavity near the rotating shaft.

[0006] As an improvement of the above technical solution: multiple ventilation holes 1 are provided at both ends of the motor housing, a first mounting plate is connected to the inner cavity of the motor housing and at both ends of the rotor, the rotating shaft is connected to the first mounting plate through a bearing, a number of ventilation holes 4 are provided on the first mounting plate, and a plurality of ventilation holes 2 are provided on the inner wall of the motor housing near the stator, and the ventilation holes 2 are communicated with the annular heat dissipation cavity.

[0007] As an improvement of the above technical solution: one end of the rotating shaft away from the fan blades is connected to a rotating rod through a connecting piece, one end of the rotating rod extends to the outside of the motor housing and is connected to an annular connecting frame through a connecting rod, one end of the arc-shaped movable plate passes through the outside of the motor housing, and the outer side wall of the annular connecting frame is fixedly connected to the inner side wall of the arc-shaped movable plate.

[0008] As an improvement of the above technical solution: the connecting piece is a planetary gear reducer or a cylinder.

[0009] As an improvement of the above technical solution: multiple semiconductor refrigeration plates are distributed on the axis of the arc-shaped movable plate, the cooling end of each semiconductor refrigeration plate is in contact with one side of the heat-conducting layer, multiple connecting holes are provided on the arc-shaped movable plate, the connecting holes pass through the inner and outer sides of the arc-shaped movable plate, the heating end of the semiconductor refrigeration plate is aligned with the connecting hole, and the arc-shaped movable plate is provided with multiple air guide plates arranged away from the semiconductor refrigeration plate.

[0010] As an improvement of the above technical solution: a plurality of semiconductor refrigeration plates 2 are installed at both ends of the arc movable plate, and a plurality of connecting holes 2 corresponding to the semiconductor refrigeration plates 2 are provided on the arc movable plate, the cooling end of the semiconductor refrigeration plate 2 is away from the arc movable plate, the heating end of the semiconductor refrigeration plate 2 is aligned with one end of the connecting hole 2, and the other end of the connecting hole 2 is connected to the connecting hole 1.

[0011] As an improvement of the above technical solution: the negative pressure part includes a suction fan and an annular main pipe arranged in the inner cavity of the motor housing, the exhaust end of the suction fan extends to the outside of the motor housing through a pipe, the outer wall of the annular main pipe is connected with a plurality of branch pipes, the air inlet end of the suction fan is connected with the annular main pipe through a pipe, and the branch pipe is connected with the sealing part of the annular heat dissipation cavity.

[0012] As an improvement of the above technical solution: a protective shell is installed at one end of the motor housing away from the fan blades, and a plurality of ventilation holes are provided on the protective shell. One side of the arc-shaped movable plate and the annular connecting frame are both located on the inner side of the protective shell. An annular filter is connected to the opening of the annular heat dissipation cavity, and one end of the plurality of arc-shaped movable plates slides through the annular filter.

[0013] As an improvement of the above technical solution: the outer wall of the motor housing is connected to a plurality of cooling fins, one end of the cooling fins extends into the annular cooling cavity, the heat conductive layer is made of heat conductive silicone material, and the motor housing, cooling fins, and arc-shaped movable plate are all made of aluminum or copper.

[0014] Beneficial effects of the present invention:

[0015] 1. When the electric forklift motor body is running, it can drive the rotation of the shaft, and the shaft synchronously drives the rotation of the fan blades. The fan blades can circulate the outside air into the inner cavity of the motor housing, so that the heat around the stator and rotor on the motor housing flows out through the ventilation holes at one end of the motor housing, so as to achieve a preliminary heat dissipation effect on the motor housing;

[0016] When the motor body is running, some heat will be introduced into the side wall of the motor housing. At the same time, the suction fan and multiple semiconductor cooling plates are running. When the shaft rotates, the arc-shaped movable plate can be driven to rotate synchronously through the connecting parts, the rotating rod and the connected annular connecting frame, so that the multiple semiconductor cooling plates can continuously contact and connect to the side wall of the motor housing through the heat conductive layer, so that the heat on the side wall of the motor housing can be continuously absorbed by the multiple semiconductor cooling plates, and then the outside air is circulated from the sealing part to the opening of the annular heat dissipation cavity through the suction fan, so that the heat absorbed by the side wall of the motor housing inside the annular heat dissipation cavity and the heating end of the semiconductor cooling plate can effectively flow out through the opening of the annular heat dissipation cavity. Therefore, through the present application, the side wall of the motor housing and the inner cavity of the motor housing can be effectively dissipated, so as to achieve a good heat dissipation effect on the motor body, avoid the overall temperature rise of the motor being too high or the local temperature rise being too high, and improve the service life of the motor.

[0017] 2. Moreover, by operating a plurality of semiconductor cooling sheets 2, the heat around the annular heat dissipation cavity can be effectively absorbed, thereby enhancing the heat absorption effect around the annular heat dissipation cavity and further improving the heat dissipation effect on the motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 3 It is a structural schematic diagram of the annular connecting frame in the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the motor housing in the present invention.

[0022] Figure numerals: 1, motor housing; 100, ventilation hole one; 101, annular heat dissipation cavity; 102, heat dissipation fins; 103, stator; 104, rotor; 105, ventilation hole two; 2, rotating shaft; 3, suction fan; 5, annular main pipe; 51, branch pipe; 6, fan blades; 7, first mounting plate; 71, ventilation hole four; 8, connecting piece; 9, rotating rod; 11, protective shell; 111, ventilation hole three; 12, annular filter; 13, annular connecting frame; 131, connecting rod; 14, arc-shaped movable plate; 141, connecting hole one; 142, connecting hole two; 143, air guide plate; 15, semiconductor cooling plate one; 16, heat conductive layer; 17, semiconductor cooling plate two. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Example

[0025] Please refer to Figure 1-Figure 4 A flat electric forklift motor includes a motor housing 1, a rotor 104 is arranged at the central axis of the motor housing 1, a stator 103 adapted to the rotor 104 is arranged on the inner wall of the motor housing 1, a rotating shaft 2 is connected to the axis of the rotor 104, a fan blade 6 is connected to one end surface of the rotating shaft 2, an annular heat dissipation cavity 101 is arranged inside the wall of the motor housing 1, one end of the annular heat dissipation cavity 101 close to the fan blade 6 is sealed, and the other end is opened, and the opening is connected to the outside of the motor housing 1 for ventilation. A negative pressure portion is provided on the motor housing 1, and the outside air is guided from the sealing portion of the annular heat dissipation cavity 101 to the opening portion through the negative pressure portion. A plurality of arc-shaped movable plates 14 are arranged in a circular array in the annular heat dissipation cavity 101, and a plurality of semiconductor cooling plates 15 are installed on the inner side of the arc-shaped movable plates 14. A plurality of heat-conducting layers 16 corresponding to the semiconductor cooling plates 15 are connected to the annular heat dissipation cavity 101 near the rotating shaft 2. Specifically, the motor also includes other components such as wiring portions and other prior art structures, which will not be described in detail in this application.

[0026] In an optional embodiment: a plurality of ventilation holes 100 are provided at both ends of the motor housing 1. Of course, the ventilation holes 100 are not limited to the ends of the motor housing 1, but can also be provided at the sides of the motor housing 1 to facilitate ventilation of the inner cavity of the motor housing 1. When the rotating shaft 2 rotates, it can drive the fan blades 6 to rotate, so that the outside air can flow into the inner cavity of the motor housing 1, so as to facilitate the heat on the stator 103 and the rotor 104 to flow out from the inner cavity of the motor housing 1, so as to achieve a certain heat dissipation effect. The inner cavity of the motor housing 1 and both ends of the rotor 104 are connected with a first mounting plate 7. The rotating shaft 2 is connected to the first mounting plate 7 through a bearing. The first mounting plate 7 is provided with a plurality of ventilation holes 4 71. The rotating shaft 2 can be stably connected to the motor housing 1 through the first mounting plate 7. The ventilation holes 4 71 do not affect the normal ventilation and heat dissipation effect of the inner cavity of the motor housing 1. A plurality of ventilation holes 2 105 are provided on the inner wall of the motor housing 1 near the stator 103, and the ventilation holes 2 105 are connected with the annular heat dissipation cavity 101. Part of the heat dissipated from the stator 103 can enter the annular heat dissipation cavity 101 through the ventilation holes 2 105 to achieve a certain heat dissipation effect.

[0027] In an optional embodiment: one end of the rotating shaft 2 away from the fan blades 6 is connected to the rotating rod 9 through the connecting piece 8, one end of the rotating rod 9 extends to the outside of the motor housing 1 and is connected to the annular connecting frame 13 through the connecting rod 131, one end of the arc-shaped movable plate 14 passes through the outside of the motor housing 1, and the outer wall of the annular connecting frame 13 is fixedly connected to the inner wall of the arc-shaped movable plate 14, so that when the rotating shaft 2 rotates, the arc-shaped movable plate 14 on the annular connecting frame 13 can be driven to rotate synchronously.

[0028] In an optional embodiment: the connecting member 8 is a planetary gear reducer or a cylinder. When it is a planetary gear reducer, the rotation speed of the rotating rod 9 can be made lower than the rotation speed of the rotating shaft 2, so that the arc-shaped movable plate 14 can be controlled to rotate at a suitable speed in the annular heat dissipation cavity 101.

[0029] In an optional embodiment: a plurality of semiconductor refrigeration sheets 15 are distributed on the axis of the arc movable plate 14, the cooling end of each semiconductor refrigeration sheet 15 is in contact with one side of the heat conductive layer 16, a plurality of connecting holes 141 are provided on the arc movable plate 14, the connecting holes 141 penetrate the inner and outer sides of the arc movable plate 14, the heating end of the semiconductor refrigeration sheet 15 is aligned with the connecting hole 141, and the arc movable plate 14 is arranged away from the semiconductor refrigeration sheet 15 and provided with a plurality of air guide plates 143, the heat emitted from the heating end of the air guide plate 143 is conducted to the annular heat dissipation cavity 101 through the connecting hole 141, and then the heat is conveniently conducted from the annular heat dissipation cavity 101 through the opening through the plurality of air guide plates 143.

[0030] In an optional embodiment: a plurality of semiconductor refrigeration plates 17 are installed at both ends of the arc movable plate 14, and a plurality of connecting holes 142 corresponding to the semiconductor refrigeration plates 17 are provided on the arc movable plate 14. The cooling end of the semiconductor refrigeration plate 17 is away from the arc movable plate 14, and the heating end of the semiconductor refrigeration plate 17 is aligned with one end of the connecting hole 142, and the other end of the connecting hole 142 is connected to the connecting hole 1 141. The heat around the annular heat dissipation cavity 101 can be absorbed and cooled by the plurality of semiconductor refrigeration plates 17 to achieve a good heat dissipation effect.

[0031] In an optional embodiment: the negative pressure part includes a suction fan 3 and an annular main pipe 5 arranged in the inner cavity of the motor housing 1, the exhaust end of the suction fan 3 extends to the outside of the motor housing 1 through a pipe, and a filter is installed on the pipe to prevent external impurities from entering the inner cavity of the motor housing 1. The outer wall of the annular main pipe 5 is connected with multiple branch pipes 51, and the air inlet end of the suction fan 3 is connected to the annular main pipe 5 through a pipe, and the branch pipe 51 is connected to the sealing part of the annular heat dissipation cavity 101. By running the suction fan 3, the outside air can be drawn into the annular heat dissipation cavity 101.

[0032] In an optional embodiment: a protective shell 11 is installed at one end of the motor housing 1 away from the fan blades 6, and a plurality of ventilation holes 3 111 are provided on the protective shell 11. One side of the arc-shaped movable plate 14 and the annular connecting frame 13 are both located on the inner side of the protective shell 11. The protective shell 11 can protect the arc-shaped movable plate 14 and the annular connecting frame 13. The normal ventilation and heat dissipation of the motor housing 1 is ensured through the ventilation holes 3 111. The opening of the annular heat dissipation cavity 101 is connected with an annular filter 12. One end of the plurality of arc-shaped movable plates 14 slides through the annular filter 12. The annular filter 12 can guide and limit the arc-shaped movable plates 14. Further, filters are connected to the ventilation holes 100 and the ventilation holes 3 111 to prevent external impurities from entering the inner cavity of the motor housing 1 and causing an impact.

[0033] In an optional embodiment: the outer wall of the motor housing 1 is connected to a plurality of heat dissipation fins 102, one end of the heat dissipation fin 102 extends into the annular heat dissipation cavity 101, the heat conductive layer 16 is made of a heat conductive silicone material, the motor housing 1, the heat dissipation fins 102, and the arc-shaped movable plate 14 are all made of aluminum or copper, and the heat dissipation effect of the motor housing 1 can be further enhanced through the heat dissipation fins 102.

[0034] Specifically, when the electric forklift motor body is running, the rotating shaft 2 can be driven to rotate, and the rotating shaft 2 synchronously drives the fan blades 6 to rotate, and the external air can flow into the inner cavity of the motor housing 1 through the fan blades 6, so that the heat around the stator 103 and the rotor 104 on the motor housing 1 flows out through the ventilation hole 100 at one end of the motor housing 1, so as to achieve a preliminary heat dissipation effect on the motor housing 1;

[0035] When the motor body is running, some heat will be introduced into the side wall of the motor housing 1. At the same time, the suction fan 3 and multiple semiconductor cooling sheets 15 are running. When the shaft 2 rotates, the arc movable plate 14 can be driven to rotate synchronously through the connecting piece 8, the rotating rod 9 and the connected annular connecting frame 13, so that the multiple semiconductor cooling sheets 15 can continuously contact and connect to the side wall of the motor housing 1 through the heat conductive layer 16, so that the heat on the side wall of the motor housing 1 can be continuously absorbed by the multiple semiconductor cooling sheets 15, and then the outside air is circulated from the sealing part of the annular heat dissipation cavity 101 to the opening part through the suction fan 3, so that the heat absorbed by the side wall of the motor housing 1 inside the annular heat dissipation cavity 101 and the heating end of the semiconductor cooling sheet 15 can effectively flow out through the opening part of the annular heat dissipation cavity 101, so that the side wall of the motor housing 1 and the inner cavity of the motor housing 1 can be effectively cooled by the present application, so as to achieve a good heat dissipation effect on the motor body;

[0036] Furthermore, by operating a plurality of semiconductor cooling sheets 17, the heat around the annular heat dissipation cavity 101 can be effectively absorbed, thereby enhancing the heat absorption effect around the annular heat dissipation cavity 101 and further improving the heat dissipation effect on the motor body.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flat electric forklift motor, comprising a motor housing (1), wherein a rotor (104) is provided at the central axis of the motor housing (1), a stator (103) adapted to the rotor (104) is provided on the inner wall of the motor housing (1), and a rotating shaft (2) is connected to the axis of the rotor (104), wherein: The surface of one end of the rotating shaft (2) is connected to a fan blade (6); an annular heat dissipation cavity (101) is provided inside the wall of the motor housing (1); one end of the annular heat dissipation cavity (101) close to the fan blade (6) is sealed, and the other end is opened; a negative pressure portion is provided on the motor housing (1), and the outside air is guided from the sealed portion of the annular heat dissipation cavity (101) to the open portion through the negative pressure portion; a plurality of arc-shaped movable plates (14) are arranged in a circular array inside the annular heat dissipation cavity (101); a plurality of semiconductor cooling plates (15) are installed on the inner side of the arc-shaped movable plates (14); and a plurality of heat-conducting layers (16) corresponding to the semiconductor cooling plates (15) are connected to the annular heat dissipation cavity (101) near the rotating shaft (2).

2. A flat electric forklift motor according to claim 1, characterized in that: Both ends of the motor housing (1) are provided with a plurality of ventilation holes one (100); the inner cavity of the motor housing (1) and both ends of the rotor (104) are connected to a first mounting plate (7); the rotating shaft (2) is connected to the first mounting plate (7) via a bearing; the first mounting plate (7) is provided with a plurality of ventilation holes four (71); the inner side wall of the motor housing (1) is provided with a plurality of ventilation holes two (105) near the stator (103); and the ventilation holes two (105) are communicated with the annular heat dissipation cavity (101).

3. A flat electric forklift motor according to claim 2, characterized in that: One end of the rotating shaft (2) away from the fan blade (6) is connected to a rotating rod (9) via a connecting piece (8); one end of the rotating rod (9) extends to the outside of the motor housing (1) and is connected to an annular connecting frame (13) via a connecting rod (131); one end of the arc-shaped movable plate (14) penetrates to the outside of the motor housing (1); and the outer side wall of the annular connecting frame (13) is fixedly connected to the inner side wall of the arc-shaped movable plate (14).

4. A flat electric forklift motor according to claim 3, characterized in that: The connecting member (8) is a planetary gear reducer or a cylinder.

5. A flat electric forklift motor according to claim 4, characterized in that: A plurality of the semiconductor cooling sheets (15) are distributed on the axis of the arc-shaped movable plate (14), the cooling end of each of the semiconductor cooling sheets (15) is in contact with one side of the heat-conducting layer (16), a plurality of connecting holes (141) are provided on the arc-shaped movable plate (14), the connecting holes (141) penetrate the inner and outer sides of the arc-shaped movable plate (14), the heating end of the semiconductor cooling sheet (15) is aligned with the connecting hole (141), and a plurality of air guide plates (143) are arranged on the arc-shaped movable plate (14) away from the semiconductor cooling sheet (15).

6. A flat electric forklift motor according to claim 5, characterized in that: A plurality of semiconductor cooling plates (17) are installed at both ends of the arc-shaped movable plate (14), and a plurality of connecting holes (142) corresponding to the semiconductor cooling plates (17) are provided on the arc-shaped movable plate (14). The cooling end of the semiconductor cooling plate (17) is away from the arc-shaped movable plate (14), and the heating end of the semiconductor cooling plate (17) is aligned with one end of the connecting hole (142), and the other end of the connecting hole (142) is connected to the connecting hole (141).

7. The flat electric forklift motor according to claim 1, characterized in that: The negative pressure portion comprises a suction fan (3) and an annular main pipe (5) arranged in the inner cavity of the motor housing (1); the air exhaust end of the suction fan (3) extends to the outside of the motor housing (1) through a pipeline; the outer wall of the annular main pipe (5) is connected to a plurality of branch pipes (51); the air inlet end of the suction fan (3) is connected to the annular main pipe (5) through a pipeline; and the branch pipe (51) is connected to the sealing portion of the annular heat dissipation cavity (101).

8. The flat electric forklift motor according to claim 1, characterized in that: A protective shell (11) is installed at one end of the motor housing (1) away from the fan blades (6), and a plurality of ventilation holes (111) are provided on the protective shell (11). One side of the arc-shaped movable plate (14) and the annular connecting frame (13) are both located on the inner side of the protective shell (11). An annular filter (12) is connected to the opening of the annular heat dissipation cavity (101), and one end of the plurality of arc-shaped movable plates (14) slides through the annular filter (12).

9. The flat electric forklift motor according to claim 1, characterized in that: The outer wall of the motor housing (1) is connected to a plurality of heat dissipation fins (102), one end of the heat dissipation fin (102) extends into the annular heat dissipation cavity (101), the heat conductive layer (16) is made of a heat conductive silicone material, and the motor housing (1), the heat dissipation fins (102) and the arc-shaped movable plate (14) are all made of aluminum or copper.

Images