Flat electric forklift motor

Abstract

The application relates to a flat electric forklift motor which comprises a motor shell, a rotor arranged at the central axis in the motor shell, a stator matched with the rotor arranged on the inner wall of the motor shell, a rotating shaft connected to the rotor towards the axis, a fan blade connected to one end surface of the rotating shaft, an annular heat dissipation cavity arranged in the wall of the motor shell, one end of the annular heat dissipation cavity being provided with a sealing structure and the other end being provided with an opening structure, a negative pressure part arranged on the motor shell, a plurality of arc-shaped movable plates arranged in a circular array in the annular heat dissipation cavity, a plurality of semiconductor refrigerating fins I arranged on the inner side of the arc-shaped movable plates, and a plurality of heat-conducting layers corresponding to the semiconductor refrigerating fins I connected to the annular heat dissipation cavity close to the rotating shaft. The application can effectively dissipate heat from the side wall of the motor shell and the inner cavity of the motor shell, good heat dissipation effect of the motor body is achieved, the overall temperature rise or the local temperature rise of the motor is avoided, and the service life of the motor is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the motor technology field, especially to a kind of flat electric forklift motor. BACKGROUND

[0002] Flat electric forklift motor is used as power source in electric forklift. It can provide sufficient power output in limited space. They are suitable for installation in space-limited application scenarios, such as electric forklift and other industrial vehicles.

[0003] During the continuous operation of electric forklift motor, a lot of heat is generated. In the prior art, only natural cooling or local cooling of the internal part of the electric forklift motor by a fan is provided. A lot of heat is still accumulated on the wall of the electric forklift motor and cannot be dissipated, resulting in excessive overall temperature rise or local temperature rise of the motor. This not only reduces the service life of the motor, but also causes serious deformation of the motor structure, which endangers the safety of the motor operation. SUMMARY

[0004] The present application provides a kind of flat electric forklift motor to solve the problems existing in the prior art, and the specific technical solutions are as follows:

[0005] A kind of flat electric forklift motor, comprising a motor housing, a rotor is arranged at the center axis inside the motor housing, a stator is arranged on the inner wall of the motor housing and matched with the rotor, a rotating shaft is connected to the rotor along the axis, a fan blade is connected to one end surface of the rotating shaft, an annular heat dissipation cavity is arranged inside the wall of the motor housing, one end of the annular heat dissipation cavity is closed and the other end is open, a negative pressure part is arranged on the motor housing, air from the outside is guided out from the closed end to the open end of the annular heat dissipation cavity through the negative pressure part, a plurality of arc-shaped movable plates are arranged in a circular array inside the annular heat dissipation cavity, a plurality of semiconductor refrigerating fins are mounted on the inner side of the arc-shaped movable plates, and a plurality of heat-conducting layers corresponding to the semiconductor refrigerating fins are connected to the rotating shaft near the annular heat dissipation cavity.

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

[0007] As the improvement of the above technical scheme: the one end of the rotating shaft away from the fan blade is connected with a rotating rod through a connecting piece, the one end of the rotating rod extends to the outside of the motor shell and is connected with a ring-shaped connecting frame through a connecting rod, the one end of the arc-shaped movable plate penetrates to the outside of the motor shell, and the outer side wall of the ring-shaped connecting frame is fixedly connected to the inner side wall of the arc-shaped movable plate.

[0008] As the improvement of the above technical scheme: the connecting piece is a planetary gear reducer or a column.

[0009] As the improvement of the above technical scheme: a plurality of semiconductor refrigeration pieces one are distributed on the axis of the arc-shaped movable plate, the refrigeration end of each semiconductor refrigeration piece one is in contact with one side of the heat conduction layer, a plurality of connecting holes one are arranged on the arc-shaped movable plate, the connecting holes one penetrate the inner and outer sides of the arc-shaped movable plate, the heating end of the semiconductor refrigeration piece one is aligned with the connecting hole one, and a plurality of air deflectors are arranged on the arc-shaped movable plate away from the semiconductor refrigeration piece one.

[0010] As the improvement of the above technical scheme: a plurality of semiconductor refrigeration pieces two are mounted at the two ends of the arc-shaped movable plate, a plurality of connecting holes two corresponding to the semiconductor refrigeration pieces two are arranged on the arc-shaped movable plate, the refrigeration end of the semiconductor refrigeration piece two is away from the arc-shaped movable plate, the heating end of the semiconductor refrigeration piece two is aligned with the one end of the connecting hole two, and the other end of the connecting hole two is in communication with the connecting hole one.

[0011] As the improvement of the above technical scheme: the negative pressure part comprises a suction fan and a ring-shaped main pipe arranged in the inner cavity of the motor shell, the suction end of the suction fan extends to the outside of the motor shell through a pipeline, the outer side wall of the ring-shaped main pipe is communicated with a plurality of branch pipes, the air inlet end of the suction fan is communicated with the ring-shaped main pipe through a pipeline, and the branch pipes are communicated with the sealing portions of the ring-shaped heat dissipation cavities.

[0012] As the improvement of the above technical scheme: the one end of the motor shell away from the fan blade is mounted with a protective shell, a plurality of ventilation holes three are arranged on the protective shell, one side of the arc-shaped movable plate and the ring-shaped connecting frame are located on the inner side of the protective shell, a ring-shaped filter screen is connected to the opening of the ring-shaped heat dissipation cavity, and the one end of the plurality of arc-shaped movable plates slides through the ring-shaped filter screen.

[0013] As the improvement of the above technical scheme: the outer wall of the motor shell is connected with a plurality of heat dissipation fins, the one end of the heat dissipation fin extends into the ring-shaped heat dissipation cavity, the heat conduction layer is made of heat conduction silica gel material, and the motor shell, the heat dissipation fin and the arc-shaped movable plate are made of aluminum or copper.

[0014] The beneficial effects of the present application are as follows:

[0015] 1、When the electric motor body is running, the rotation of the rotating shaft can be driven, and the rotating shaft synchronously drives the rotation of the fan blade. The fan blade can circulate the external air into the inner cavity of the motor housing, so that the heat around the stator and the rotor on the motor housing flows out through the ventilation hole at one end of the motor housing, thereby achieving a preliminary heat dissipation effect on the motor housing;

[0016] When the motor body is running, part of the heat is also introduced to the side wall of the motor housing, and the air suction fan and the plurality of semiconductor refrigerating sheets are operated simultaneously. When the rotating shaft rotates, the arc-shaped movable plate can be synchronously rotated through the connecting piece, the rotating rod and the connected annular connecting frame, so that the plurality of semiconductor refrigerating sheets I can be continuously contacted and connected to the side wall of the motor housing through the heat conduction layer, thereby the plurality of semiconductor refrigerating sheets I can continuously absorb the heat on the side wall of the motor housing, and the external air is circulated from the opening to the opening of the annular heat dissipation cavity through the air suction fan, so that the heat absorbed by the side wall of the motor housing and the heat generated by the semiconductor refrigerating sheet I is effectively discharged from the opening of the annular heat dissipation cavity, thereby the side wall of the motor housing and the inner cavity of the motor housing can be effectively cooled through the application, and a good heat dissipation effect of the motor body is achieved, so as to avoid the overall temperature rise or local temperature rise of the motor, and the service life of the motor is improved.

[0017] 2、And, by operating the plurality of semiconductor refrigerating sheets II, the heat around the annular heat dissipation cavity can be effectively absorbed, thereby the heat absorption effect around the annular heat dissipation cavity can be enhanced, and the heat dissipation effect of the motor body is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure schematic diagram of the whole application;

[0019] Figure 2 The structure schematic diagram of the whole application; Figure 1 The structure schematic diagram of the whole application;

[0020] Figure 3 The structure schematic diagram of the whole application;

[0021] Figure 4 The structure schematic diagram of the whole application.

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

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0024] EXAMPLE

[0025] Please refer to Figures 1-4 A flat electric forklift motor, comprising a motor housing 1, a rotor 104 is arranged at the center axis inside the motor housing 1, a stator 103 is arranged on the inner wall of the motor housing 1 and matched with the rotor 104, a rotating shaft 2 is connected to the rotor 104 towards the axis, 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 is closed and the other end is open, the open end is communicated to the outside of the motor housing 1 for ventilation, a negative pressure part is arranged on the motor housing 1, air outside is guided from the closed end to the open end of the annular heat dissipation cavity 101 through the negative pressure part, a plurality of arc-shaped movable plates 14 are arranged in circular array inside the annular heat dissipation cavity 101, a plurality of semiconductor refrigeration sheets one 15 are mounted on the inner side of the arc-shaped movable plates 14, a plurality of heat conduction layers 16 corresponding to the semiconductor refrigeration sheets one 15 are connected to the annular heat dissipation cavity 101 close to the rotating shaft 2, and the motor further comprises other components such as a wiring part and the structure of the prior art, which will not be described herein.

[0026] In an optional embodiment: the two ends of the motor shell 1 are provided with a plurality of ventilation holes one 100, of course, the ventilation holes one 100 are not limited to the end of the motor shell 1, but also can be provided at the side of the motor shell 1, which is convenient for the ventilation of the inner cavity of the motor shell 1, when the rotating shaft 2 rotates, the fan blade 6 can be driven to rotate, so that the outside air flows into the inner cavity of the motor shell 1, so as to flow out the heat on the stator 103 and the rotor 104 from the inner cavity of the motor shell 1, to achieve a certain heat dissipation effect, the inner cavity of the motor shell 1 and located at both ends of the rotor 104 is connected with the first mounting plate 7, the rotating shaft 2 is connected on the first mounting plate 7 through the bearing, the first mounting plate 7 is provided with a plurality of ventilation holes four 71, the rotating shaft 2 can be stably connected on the motor shell 1 through the first mounting plate 7, the ventilation holes four 71 do not affect the normal ventilation and heat dissipation effect of the inner cavity of the motor shell 1, the inner side wall of the motor shell 1 close to the stator 103 is provided with a plurality of ventilation holes two 105, and the ventilation holes two 105 are communicated with the annular heat dissipation cavity 101, part of the heat dissipation heat of the stator 103 can enter the annular heat dissipation cavity 101 through the ventilation holes two 105, to achieve a certain heat dissipation effect.

[0027] In an optional embodiment: the end of the rotating shaft 2 away from the fan blade 6 is connected with the rotating rod 9 through the connecting piece 8, one end of the rotating rod 9 extends to the outside of the motor shell 1 and is connected with the annular connecting frame 13 through the connecting rod 131, one end of the arc-shaped movable plate 14 penetrates to the outside of the motor shell 1, 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, 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 piece 8 is a planetary gear reducer or a column, when it is a planetary gear reducer, the rotating speed of the rotating rod 9 can be less than that of the rotating shaft 2, so that the arc-shaped movable plate 14 can be controlled to rotate in the annular heat dissipation cavity 101 at a suitable speed.

[0029] In an optional embodiment: a plurality of semiconductor refrigerating sheets one 15 are distributed on the axis of the arc-shaped movable plate 14, the refrigeration end of each semiconductor refrigerating sheet one 15 is in contact with one side of the heat conduction layer 16, the arc-shaped movable plate 14 is provided with a plurality of connecting holes one 141 penetrating the inner and outer sides of the arc-shaped movable plate 14, the heating end of the semiconductor refrigerating sheet one 15 is aligned with the connecting hole one 141, a plurality of air deflectors 143 are arranged on the arc-shaped movable plate 14 away from the semiconductor refrigerating sheet one 15, the heat emitted by the heating end of the air deflector 143 is guided out to the annular heat dissipation cavity 101 through the connecting hole one 141, and then the heat is guided out from the opening of the annular heat dissipation cavity 101 through the plurality of air deflectors 143.

[0030] In an optional embodiment: the two ends of the arc-shaped movable plate 14 are provided with a plurality of semiconductor refrigerating sheets two 17, the arc-shaped movable plate 14 is provided with a plurality of connecting holes two 142 corresponding to the semiconductor refrigerating sheets two 17, the refrigerating end of the semiconductor refrigerating sheets two 17 is away from the arc-shaped movable plate 14, the heating end of the semiconductor refrigerating sheets two 17 is aligned with one end of the connecting holes two 142, the other end of the connecting holes two 142 is communicated with the connecting holes one 141, and the heat around the annular heat dissipation cavity 101 can be absorbed and cooled through the plurality of semiconductor refrigerating sheets two 17, so that a good heat dissipation effect is achieved.

[0031] In an optional embodiment: the negative pressure part includes the suction fan 3 and the annular main pipe 5 arranged in the inner cavity of the motor shell 1, the suction end of the suction fan 3 extends to the outer side of the motor shell 1 through a pipeline, a filter screen is arranged on the pipeline to prevent impurities in the outside from entering the inner cavity of the motor shell 1, the outer side wall of the annular main pipe 5 is communicated with a plurality of branch pipes 51, the air inlet end of the suction fan 3 is communicated with the annular main pipe 5 through a pipeline, and the branch pipes 51 are communicated with the sealing portions of the annular heat dissipation cavities 101, so that the air in the outside can be sucked into the annular heat dissipation cavities 101 by operating the suction fan 3.

[0032] In an optional embodiment: the end of the motor shell 1 away from the fan blade 6 is provided with the protective shell 11, the protective shell 11 is provided with a plurality of ventilation holes three 111, one side of the arc-shaped movable plate 14 and the annular connecting frame 13 are located in 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 ventilation holes three 111 ensure the normal ventilation and heat dissipation of the motor shell 1, the opening of the annular heat dissipation cavity 101 is connected with the annular filter screen 12, one end of the plurality of arc-shaped movable plates 14 slides through the annular filter screen 12, and the annular filter screen 12 can guide and limit the arc-shaped movable plate 14. Further, filter screens are connected in the ventilation holes one 100 and the ventilation holes three 111 to prevent impurities in the outside from entering the inner cavity of the motor shell 1 and causing influence.

[0033] In an optional embodiment: the outer wall of the motor shell 1 is connected with a plurality of heat dissipation fins 102, one end of the heat dissipation fins 102 extends into the annular heat dissipation cavity 101, the heat conduction layer 16 is made of heat conduction silica gel material, and the motor shell 1, the heat dissipation fins 102 and the arc-shaped movable plate 14 are made of aluminum or copper, so that the heat dissipation effect of the motor shell 1 is further improved through the heat dissipation fins 102.

[0034] Specifically, when the electric forklift motor body is running, the rotation of the rotating shaft 2 can be driven, and the rotating shaft 2 synchronously drives the rotation of the fan blade 6. Through the fan blade 6, the outside air can be circulated into the inner cavity of the motor housing 1, 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, thereby achieving a preliminary heat dissipation effect on the motor housing 1.

[0035] When the motor body is running, part of the heat will also be introduced to the side wall of the motor housing 1, and the suction fan 3 and the plurality of semiconductor refrigerating sheets 15 are also running. When the rotating shaft 2 rotates, the arc-shaped movable plate 14 can be synchronously rotated through the connecting piece 8, the rotating rod 9 and the connected annular connecting frame 13, so that the plurality of semiconductor refrigerating sheets 15 can be continuously contacted and connected to the side wall of the motor housing 1 through the heat-conducting layer 16, thereby the plurality of semiconductor refrigerating sheets 15 can continuously absorb the heat on the side wall of the motor housing 1, and then the outside air is circulated from the sealing portion to the opening portion of the annular heat dissipation cavity 101 through the suction fan 3, so that the heat absorbed by the side wall of the motor housing 1 and the heat generated by the semiconductor refrigerating sheet 15 is effectively discharged from the opening portion of the annular heat dissipation cavity 101, thereby the side wall of the motor housing 1 and the inner cavity of the motor housing 1 can be effectively cooled, and a good heat dissipation effect of the motor body is achieved.

[0036] Furthermore, by running the plurality of semiconductor refrigerating sheets 17, the heat around the annular heat dissipation cavity 101 can be effectively absorbed, thereby the heat absorption effect around the annular heat dissipation cavity 101 can be enhanced, and the heat dissipation effect of the motor body is further improved.

[0037] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flat electric fork truck motor, comprising a motor housing (1), a rotor (104) is arranged at the center axis inside the motor housing (1), a stator (103) is arranged on the inner wall of the motor housing (1) and matched with the rotor (104), and a rotating shaft (2) is connected to the rotor (104) towards the axis, characterized in that, One end surface of the rotating shaft (2) is connected with a fan blade (6), an annular heat dissipation cavity (101) is arranged in the wall of the motor shell (1), one end of the annular heat dissipation cavity (101) is provided with a closed end, and the other end is provided with an open end, a negative pressure part is arranged on the motor shell (1), and air outside is guided out from the closed end to the open end of the annular heat dissipation cavity (101), a plurality of arc-shaped movable plates (14) are arranged in the annular heat dissipation cavity (101) in a circular array, a plurality of semiconductor refrigerating sheets (15) are arranged on the inner side of the arc-shaped movable plate (14), and a plurality of heat conduction layers (16) corresponding to the semiconductor refrigerating sheets (15) are connected to the annular heat dissipation cavity (101) close to the rotating shaft (2). A plurality of ventilation holes (100) are arranged at both ends of the motor shell (1), a first mounting plate (7) is connected to both ends of the motor shell (1) and located at the rotor (104), the rotating shaft (2) is connected to the first mounting plate (7) through a bearing, a plurality of ventilation holes (71) are arranged on the first mounting plate (7), a plurality of ventilation holes (105) are arranged on the inner side wall of the motor shell (1) close to the stator (103), and the ventilation holes (105) are in communication with the annular heat dissipation cavity (101). One end of the rotating shaft (2) away from the fan blade (6) is connected with a rotating rod (9) through a connecting piece (8), one end of the rotating rod (9) extends to the outside of the motor shell (1) and is connected with an annular connecting frame (13) through a connecting rod (131), one end of the arc-shaped movable plate (14) penetrates to the outside of the motor shell (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).

2. The flat electric fork truck motor of claim 1, wherein: The connecting piece (8) is a planetary gear reducer or a column.

3. The flat electric fork truck motor of claim 2, wherein: A plurality of semiconductor refrigerating sheets (15) are distributed on the axis of the arc-shaped movable plate (14), the refrigerating end of each semiconductor refrigerating sheet (15) is in contact with one side of the heat conduction layer (16), a plurality of connecting holes (141) are arranged 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 refrigerating sheet (15) is aligned with the connecting hole (141), and a plurality of air deflectors (143) are arranged on the arc-shaped movable plate (14) away from the semiconductor refrigerating sheet (15).

4. The flat type electric fork truck motor according to claim 3, wherein: A plurality of semiconductor refrigerating sheets (17) are arranged at both ends of the arc-shaped movable plate (14), a plurality of connecting holes (142) corresponding to the semiconductor refrigerating sheets (17) are arranged on the arc-shaped movable plate (14), the refrigerating end of the semiconductor refrigerating sheet (17) is away from the arc-shaped movable plate (14), the heating end of the semiconductor refrigerating sheet (17) is aligned with one end of the connecting hole (142), and the other end of the connecting hole (142) is in communication with the connecting hole (141).

5. The flat electric fork truck motor of claim 1, wherein: The negative pressure part includes a suction fan (3) arranged in the inner cavity of the motor shell (1) and an annular main pipe (5), the suction end of the suction fan (3) extends to the outside of the motor shell (1) through a pipeline, the outer wall of the annular main pipe (5) is communicated with a plurality of branch pipes (51), the air inlet end of the suction fan (3) is communicated with the annular main pipe (5) through a pipeline, and the branch pipe (51) is communicated with the sealing portion of the annular heat dissipation cavity (101).

6. The flat electric fork truck motor of claim 1, wherein: The motor shell (1) is provided with a protective shell (11) at one end away from the fan blade (6), a plurality of ventilation holes (111) are arranged on the protective shell (11), one side of the arc-shaped movable plate (14) and the annular connecting frame (13) is located on the inner side of the protective shell (11), the annular heat dissipation cavity (101) is connected with an annular filter screen (12) at the opening, and one end of the plurality of arc-shaped movable plates (14) slides through the annular filter screen (12).

7. The flat electric fork truck motor of claim 1, wherein: The outer wall of the motor shell (1) is connected with 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 conduction layer (16) is made of heat-conducting silica gel material, and the motor shell (1), the heat dissipation fin (102) and the arc-shaped movable plate (14) are made of aluminum or copper.

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