Electric drain valve device

Abstract

The utility model relates to the technical field of electric drain valves, and discloses an electric drain valve device which comprises a drain valve body, a power assembly and a traction assembly. The electric drainage valve device is small in control power, can cope with a high-temperature environment and has a cleaning function, the silica gel valve element, the valve element keel, the valve element spring and the valve element cover form a one-way directional elastic plugging valve element, a drainage opening of the valve body is sealed, automatic normally-closing is achieved, sand grains or the problem of physical valve clamping can be automatically solved, and the electric drainage valve device is suitable for large-scale popularization and application. If the drainage port is tightly closed due to the influence of impurities in the last time, the drainage port can be automatically washed away by drained water during the second time of drainage; the power assembly is controlled through the control circuit board; through the electromagnet, the magnet, the traction rope, the traction wheel, the motor and the turbine gearbox, the silica gel valve element is opened during electrification, and the drainage function is started; the function of resetting the silica gel valve element and stopping drainage during power failure is achieved through the motor separation spring; and finally, drainage in a scene with sand or other sundries is realized.

Description

Technical Field

[0001] The present application relates to the technical field of electric drain valves, and in particular to an electric drain valve device. Background Art

[0002] In view of the existing scenario of large-flow sewage drainage without pressure, the existing ball valve principle electric valve, whose principle is to rotate and close the drain outlet, can only solve the problem of switching clean water sources, and cannot adapt to scenarios with sand or other debris.

[0003] Chinese patent number CN201921267337.3 discloses a diverter-type sewage drain valve, which achieves the separation of sewage and impurities, but requires regular treatment of the filter box, increasing the workload of drainage. Utility Model Content

[0004] The purpose of this application is to provide an electric drain valve device to solve the technical problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application discloses the following technical solutions: an electric drain valve device, comprising: a drain valve body, a power assembly and a traction assembly;

[0006] The power assembly comprises: a power box, a control circuit board, a turbine gearbox, a motor separation spring, a motor bracket, a motor, an iron magnet, an electromagnet and an electromagnet bracket, wherein the control circuit board, the turbine gearbox, the motor separation spring, the motor bracket, the motor, the iron magnet, the electromagnet and the electromagnet bracket are all installed in the power box, and the power box comprises a power box cover and a power box bottom;

[0007] The control circuit board is fixedly mounted on the bottom of the power box, and the motor and the electromagnet are both connected to the control circuit board;

[0008] The drain valve body includes: a valve body, a silicone valve core, a valve core keel, a valve core spring and a valve core cover; the silicone valve core is a threaded structure, the valve core cover includes a cover plate portion and a sleeve portion, the valve core keel includes a valve core and a limit plate, the cover plate portion is fixedly connected to the power box, the sleeve portion is sleeved on the outside of the valve core, the cover plate portion and the limit plate are arranged opposite to each other, the inner diameter of the sleeve portion is smaller than the outer diameter of the limit plate, and the outer diameters of the limit plate and the cover plate portion are larger than the outer diameter of the valve core spring; the valve core spring is sleeved on the outside of the sleeve portion and the valve core, the silicone The valve core is sleeved on the outside of the valve core spring and the limit plate, the outer diameter of the limit plate is smaller than the thread outer diameter of the silicone valve core and larger than the thread inner diameter of the silicone valve core, the valve body is sleeved on the outside of the silicone valve core, the valve body is fixedly connected to the cover plate portion, and in the initial state, the silicone valve core abuts against the drain port of the valve body; the traction assembly comprises: a traction rope and a traction wheel; the first end of the traction rope is connected to the traction wheel, and the second end passes through the cover plate portion and extends to the inside of the sleeve portion and is fixed to the end of the valve core; the traction wheel is fixedly connected to the power box;

[0009] The motor bracket is arranged on the bottom of the power box, the electric motor is fixedly mounted on the motor bracket, and a worm is mounted on the output end of the electric motor;

[0010] The motor separation spring comprises: a spring body, a first buckle and a second buckle, wherein the first buckle and the second buckle are mounted at two ends of the spring body; the first buckle is fixedly connected to the motor bracket, and the second buckle is fixedly connected to the power box cover;

[0011] The electromagnet bracket is fixedly mounted on the bottom of the power box, the electromagnet is fixedly mounted on the electromagnet bracket, the magnet is fixedly mounted on the motor bracket, and the electromagnet and the magnet are spaced apart; the turbine gearbox is fixedly mounted on the bottom of the power box, and one end of the worm rod extends into the turbine gearbox. In an initial state, the worm rod and the turbine in the turbine gearbox are in an unlocked state, and the turbine in the turbine gearbox is connected to the traction wheel; the power box cover is fixedly mounted on the bottom of the power box.

[0012] By virtue of the above, the silicone valve core is pressed against the drain outlet of the valve body in the initial state to form a one-way directional elastic sealing valve core, and the force of the valve core spring is used to make the silicone valve core seal the drain outlet of the valve body, forming an automatic normally closed state, and water cannot flow out; when the electric drain valve device is energized and enters the working state, the control circuit board energizes the electromagnet and the motor at the same time, the electromagnet generates magnetic force, and under the drive of the magnetic force of the magnet, the motor bracket is pulled to one side of the electromagnet, and the vortex rod is locked with the turbine in the turbine gearbox. At this time, the motor rotates, and after the turbine in the turbine gearbox is decelerated, it drives the traction wheel to rotate, and the traction wheel retracts the traction rope, and the other end of the traction rope is fixed on the limit plate. Because the continuous rotation of the motor shortens the traction rope, the limit plate drives the engaged silicone valve core to open, and when the silicone valve core is opened to the maximum When the electric drain valve is turned off, the control circuit board senses the maximum opening limit, and the control circuit board turns off the power supply of the motor, only keeping the electromagnet working, and the silicone valve core keeps the maximum opening state for drainage; because at this time the vortex rod remains locked with the turbine in the turbine gearbox under the magnetic force of the electromagnet and the magnet, the turbine gearbox will not reverse, and the traction wheel will not return to release the traction rope; if the power supply of the electric drain valve device is disconnected, the electromagnet loses power and magnetism, and the motor bracket together with the motor is pulled back to the original base point by the motor separation spring. At this time, the vortex rod is separated from the turbine of the turbine gearbox, causing the originally locked vortex rod to unlock the turbine in the turbine gearbox, and driven by the rebound force of the valve core spring, the silicone valve core quickly closes the drain port of the valve body, thereby achieving the purpose of opening drainage when power is on and closing drainage when power is off.

[0013] Preferably, a first fixing column and a second fixing column are provided on the bottom of the power box;

[0014] The motor bracket comprises: a first limiting hole, a second limiting hole, a bottom plate, a first side plate, a second side plate and a bending plate;

[0015] The bending plate is provided with the first limiting hole, the bottom plate is provided with the second limiting hole, the first limiting hole and the second limiting hole are arranged opposite to each other, the bending plate is fixedly mounted on the bottom plate, the first side plate is provided with a hole, and the second side plate is provided with a slot;

[0016] The first limiting hole and the second limiting hole pass through the first fixing column to install the motor bracket on the bottom of the power box; the first buckle is engaged with the slot on the second side plate; the motor is fixedly installed on the bottom plate; the worm rod passes through the hole on the first side plate; the magnet is fixedly installed on the outer side of the second side plate;

[0017] The power box cover is fixedly mounted on the power box bottom through the first fixing column and the second fixing column.

[0018] By means of the above, the motor bracket is installed on the bottom of the power box through the first limiting hole and the second limiting hole through the first fixing column and the magnet is fixedly installed on the second side panel, so that the motor bracket can be pulled toward the side of the electromagnet in the working state, and the vortex rod is locked with the turbine in the turbine gearbox; the first clip is fixedly connected with the slot on the second side panel to realize that when the electromagnet loses power and is demagnetized, the motor bracket together with the electric motor is pulled back to the initial position by the motor separation spring, and the vortex rod is separated from the turbine of the turbine gearbox, causing the originally locked vortex rod to be unlocked from the turbine in the turbine gearbox.

[0019] Beneficial effects: The electric drain valve device of the present application has low control power, can cope with high temperature environment and has its own cleaning function. A one-way directional elastic sealing valve core is formed by a silicone valve core, a valve core keel, a valve core spring and a valve core cover. The force of the valve core spring is used to make the silicone valve core seal the drain port of the valve body to achieve automatic normally closed state. It can effectively and automatically deal with the problem of sand particles or physical valve jamming. If there were impurities at the drain port last time that affected the closure, they would be automatically washed away by the drainage during the second drainage. The power component is controlled by a control circuit board. The silicone valve core is opened when power is on and drainage starts to start through an electromagnet, a magnet, a traction rope, a traction wheel, an electric motor and a turbine gearbox. The silicone valve core is reset when power is off and drainage stops through a motor separation spring. Finally, drainage is achieved in scenes with sand or other debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 An exploded schematic diagram of an electric drain valve device provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of a valve core keel of an electric drain valve device provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a valve core cover of a schematic diagram of an electric drain valve device provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of a worm rod of an electric drain valve device provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of a motor separation spring of an electric drain valve device provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the power box bottom of the electric drain valve device provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of a motor bracket of an electric drain valve device provided in an embodiment of the present application;

[0028] In the figure: 1, valve body; 2, silicone valve core; 3, valve core keel; 4, valve core spring; 5, valve core cover; 6, control circuit board; 7, traction rope; 8, turbine gearbox; 9, motor separation spring; 10, power box cover; 11, power box bottom; 12, motor bracket; 13, electric motor; 14, traction wheel; 15, magnet; 16, electromagnet; 17, electromagnet bracket; 301, valve core; 302, limit plate; 501, cover plate part; 502, sleeve part; 1301, vortex rod; 901, first buckle; 902, second buckle; 903, spring body; 1101, first fixing column; 1102, second fixing column; 1201, first limit hole; 1202, second limit hole; 1203, bottom plate; 1204, first side plate; 1205, second side plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0030] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0031] This embodiment discloses a combination of Figure 1-7 An electric drain valve device is shown, comprising: a drain valve body, a power assembly and a traction assembly.

[0032] The power assembly includes: a power box, a control circuit board 6, a turbine gearbox 8, a motor separation spring 9, a motor bracket 12, an electric motor 13, a magnet 15, an electromagnet 16 and an electromagnet bracket 17. The control circuit board 6, the turbine gearbox 8, the motor separation spring 9, the motor bracket 12, the electric motor 13, the magnet 15, the electromagnet 16 and the electromagnet bracket 17 are all installed in the power box, and the power box includes a power box cover 10 and a power box bottom 11.

[0033] The control circuit board 6 is fixedly mounted on the bottom 11 of the power box, and the motor 13 and the electromagnet 16 are both connected to the control circuit board 6; wherein the control circuit board 6 supplies power to the motor 13 and the electromagnet 16, and after the motor 13 is energized, the output end drives the worm 1301 to rotate, and the electromagnet 16 has magnetism after being energized.

[0034] In this embodiment, the motor 13 adopts a DC motor and serves as a component for the valve opening driving force. The valve core spring 4 automatically locks the valve, so it is a normally closed electric drain valve. The drain outlet is automatically opened when the power is turned on and the drain outlet is automatically closed when the power is turned off. No external control circuit is required.

[0035] The drain valve body includes: a valve body 1, a silicone valve core 2, a valve core keel 3, a valve core spring 4 and a valve core cover 5; the silicone valve core 2 is a threaded structure, the valve core cover 5 includes a cover plate portion 501 and a sleeve portion 502, the valve core keel 3 includes a valve core 301 and a limit plate 302, the cover plate portion 501 is fixedly connected to the power box, the sleeve portion 502 is sleeved on the outside of the valve core 301, the cover plate portion 501 and the limit plate 302 are arranged opposite to each other, the inner diameter of the sleeve portion 502 is smaller than the outer diameter of the limit plate 302, and the outer diameter of the limit plate 302 and the outer diameter of the cover plate portion 501 are larger than the outer diameter of the valve core spring 4, and the valve core spring 4 is limited between the limit plate 302 and the cover plate portion 501. The valve core spring 4 is sleeved on the outside of the sleeve portion 502 and the valve core 301, and the silicone valve core 2 is sleeved on the outside of the valve core spring 4 and the limit plate 302. The outer diameter of the limit plate 302 is smaller than the thread outer diameter of the silicone valve core 2 and larger than the thread inner diameter of the silicone valve core 2. At this time, the valve core keel 3 is limited to the silicone valve core 2. When in the working state, the valve core keel 3 is pulled to drive the function of the silicone valve core 2; the valve body 1 is sleeved on the outside of the silicone valve core 2, and the valve body 1 is fixedly connected to the cover plate portion 501, and in the initial state, the silicone valve core 2 is against the drain port of the valve body 1.

[0036] The traction assembly includes: a traction rope 7 and a traction wheel 14; the first end of the traction rope 7 is connected to the traction wheel 14, and the second end passes through the cover portion 501 and extends to the inside of the sleeve portion 502 and is fixed to the end of the valve core 301; the traction wheel 14 is fixedly connected to the power box.

[0037] The motor bracket 12 is arranged on the power box bottom 11 , the motor 13 is fixedly mounted on the motor bracket 12 , and a worm 1301 is mounted on the output end of the motor 13 .

[0038] The motor separation spring 9 includes: a spring body 903, a first clip 901 and a second clip 902, the first clip 901 and the second clip 902 are installed at both ends of the spring body 903; the first clip 901 is fixedly connected to the motor bracket 12, and the second clip 902 is fixedly connected to the power box cover 10.

[0039] The electromagnet bracket 17 is fixedly mounted on the power box bottom 11, the electromagnet 16 is fixedly mounted on the electromagnet bracket 17, the magnetic magnet 15 is fixedly mounted on the motor bracket 12, and the electromagnet 16 and the magnetic magnet 15 are arranged at a distance, so that during the working process, the motor bracket 12 can be pulled to the side of the electromagnet 16 under the cooperation between the electromagnet 16 and the magnetic magnet 15. The turbine gearbox 8 is fixedly mounted on the power box bottom 11, and one end of the worm rod 1301 extends into the turbine gearbox 8. In the initial state, the worm rod 1301 and the turbine in the turbine gearbox 8 are in an unlocked state, and the turbine in the turbine gearbox 8 is connected to the traction wheel 14; the power box cover 10 is fixedly mounted on the power box bottom 11.

[0040] By virtue of the above, the silicone valve core 2 is against the drain outlet of the valve body 1 in the initial state to form a one-way directional elastic sealing valve core, and the force of the valve core spring 4 makes the silicone valve core 2 seal the drain outlet of the valve body 1, forming an automatic normally closed state, and water cannot flow out; when the electric drain valve device is energized and enters the working state, the control circuit board 6 energizes the electromagnet 16 and the motor 13 at the same time, and the electromagnet 16 generates a magnetic force, and under the drive of the magnetic force of the magnet 15, the motor bracket 12 is pulled to one side of the electromagnet 16, and the vortex rod 1301 is locked with the turbine in the turbine gearbox 8. At this time, the motor 13 rotates, and after the turbine in the turbine gearbox 8 is decelerated, it drives the traction wheel 14 to rotate, and the traction wheel 14 retracts the traction rope 7, and the other end of the traction rope 7 is fixed on the limit plate 302. Because the continuous rotation of the motor 13 shortens the traction rope 7, the limit plate 302 drives the engaged silicone valve core 2 to open, and when the silicone valve core 2 is opened to When it is at its maximum, the control circuit board 6 senses the maximum opening limit, and the control circuit board 6 turns off the power supply of the motor, only keeping the electromagnet 16 working, and the silicone valve core 2 remains in the maximum opening state for drainage; because at this time the vortex rod 1301 remains locked with the turbine in the turbine gearbox 8 under the magnetic force of the electromagnet 16 and the magnet 15, the turbine gearbox 8 will not reverse, and the traction wheel 14 will not return to release the traction rope 7; if the power supply of the electric drain valve device is disconnected, the electromagnet 16 loses power and magnetism, and the motor bracket 12 together with the motor 13 is pulled back to the initial position by the motor separation spring 9, at this time the vortex rod 1301 is separated from the turbine of the turbine gearbox 8, causing the originally locked vortex rod 1301 to be unlocked from the turbine in the turbine gearbox 8, and driven by the rebound force of the valve core spring 4, the silicone valve core 2 quickly closes the drain port of the valve body 1, thereby achieving the purpose of opening drainage when power is on and closing drainage when power is off.

[0041] Specifically, a first fixing column 1101 and a second fixing column 1102 are provided on the power box bottom 11 .

[0042] The motor bracket 12 includes: a first limiting hole 1201 , a second limiting hole 1202 , a bottom plate 1203 , a first side plate 1204 , a second side plate 1205 and a bending plate 1206 .

[0043] A first limiting hole 1201 is provided on the bending plate 1206, and a second limiting hole 1202 is provided on the bottom plate 1203. The first limiting hole 1201 and the second limiting hole 1202 are arranged opposite to each other. The bending plate 1206 is fixedly installed on the bottom plate 1203, a hole is provided on the first side plate 1204, and a slot is provided on the second side plate 1205.

[0044] The first limiting hole 1201 and the second limiting hole 1202 pass through the first fixing column 1101 to install the motor bracket 12 on the power box bottom 11; the first buckle 901 is engaged with the slot on the second side plate 1205; the motor 13 is fixedly installed on the base plate 1203; the worm 1301 passes through the hole on the first side plate 1204; the magnet 15 is fixedly installed on the outer side of the second side plate 1205.

[0045] The power box cover 10 is fixedly mounted on the power box bottom 11 via a first fixing column 1101 and a second fixing column 1102 .

[0046] By means of the above, the motor bracket 12 is installed on the power box bottom 11 through the first limiting hole 1201 and the second limiting hole 1202 through the first fixing column 1101 and the magnet 15 is fixedly installed on the second side plate 1205, so that the motor bracket 12 can be pulled toward the side of the electromagnet 16 in the working state, and the vortex rod 1301 is locked with the turbine in the turbine gearbox 8; the first buckle 901 is fixedly connected with the slot on the second side plate 1205, so that when the electromagnet 16 loses power and is demagnetized, the motor bracket 12 together with the motor 13 is pulled back to the original base point by the motor separation spring 9, and the vortex rod 1301 is separated from the turbine of the turbine gearbox 8, causing the originally locked vortex rod 1301 to be unlocked from the turbine in the turbine gearbox 8.

[0047] In summary, the electric drain valve device of this embodiment has low control power, can cope with high temperature environment and has its own cleaning function. A one-way directional elastic sealing valve core is formed by the silicone valve core 2, the valve core keel 3, the valve core spring 4 and the valve core cover 5. The force of the valve core spring 4 is used to make the silicone valve core 2 seal the drain port of the valve body 1 to achieve automatic normally closed state, which can effectively and automatically deal with the problem of sand or physical valve jamming. If there were impurities at the drain port last time that affected the closure, they would be automatically washed away by the drainage during the second drainage. The power component is controlled by the control circuit board 6. The silicone valve core 2 is opened and drainage is started when power is on through the electromagnet 16, the magnet 15, the traction rope 7, the traction wheel 14, the motor 13 and the turbine gearbox 8. The silicone valve core 2 is reset and drainage is stopped when power is off through the motor separation spring 9. Finally, drainage is achieved in scenes with sand or other debris.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric drain valve device, characterized in that: include: Drain valve body, power assembly and traction assembly; The power assembly comprises: a power box, a control circuit board (6), a turbine gearbox (8), a motor separation spring (9), a motor bracket (12), an electric motor (13), an iron magnet (15), an electromagnet (16) and an electromagnet bracket (17); the control circuit board (6), the turbine gearbox (8), the motor separation spring (9), the motor bracket (12), the electric motor (13), the iron magnet (15), the electromagnet (16) and the electromagnet bracket (17) are all installed in the power box; the power box comprises a power box cover (10) and a power box bottom (11); The control circuit board (6) is fixedly mounted on the bottom of the power box (11), and the motor (13) and the electromagnet (16) are both connected to the control circuit board (6); The drain valve body comprises: a valve body (1), a silicone valve core (2), a valve core keel (3), a valve core spring (4) and a valve core cover (5); the silicone valve core (2) is a threaded structure, the valve core cover (5) comprises a cover plate portion (501) and a sleeve portion (502), the valve core keel (3) comprises a valve core (301) and a limit plate (302), the cover plate portion (501) is fixedly connected to the power box, the sleeve portion (502) is sleeved on the outside of the valve core (301), the cover plate portion (501) and the limit plate (302) are arranged opposite to each other, the inner diameter of the sleeve portion (502) is smaller than the outer diameter of the limit plate (302), and the outer diameters of the limit plate (302) and the cover plate portion (501) are larger than the outer diameter of the valve core spring (4); the valve core spring (4) is sleeved on the sleeve portion (502) and the limit plate (302). The silicone valve core (2) is sleeved on the outside of the valve core spring (4) and the limit plate (302); the outer diameter of the limit plate (302) is smaller than the outer diameter of the thread of the silicone valve core (2) and larger than the inner diameter of the thread of the silicone valve core (2); the valve body (1) is sleeved on the outside of the silicone valve core (2); the valve body (1) is fixedly connected to the cover plate portion (501), and in an initial state, the silicone valve core (2) abuts against the drain port of the valve body (1); the traction assembly comprises: a traction rope (7) and a traction wheel (14); the first end of the traction rope (7) is connected to the traction wheel (14), and the second end passes through the cover plate portion (501) and extends to the inside of the sleeve portion (502) and is fixed to the end of the valve core (301); the traction wheel (14) is fixedly connected to the power box; The motor support (12) is arranged on the bottom of the power box (11), the electric motor (13) is fixedly mounted on the motor support (12), and a worm (1301) is mounted on the output end of the electric motor (13); The motor separation spring (9) comprises: a spring body (903), a first buckle (901) and a second buckle (902), wherein the first buckle (901) and the second buckle (902) are mounted at two ends of the spring body (903); the first buckle (901) is fixedly connected to the motor bracket (12), and the second buckle (902) is fixedly connected to the power box cover (10); The electromagnet support (17) is fixedly mounted on the power box bottom (11), the electromagnet (16) is fixedly mounted on the electromagnet support (17), the magnetic magnet (15) is fixedly mounted on the motor support (12), and the electromagnet (16) and the magnetic magnet (15) are spaced apart; the turbine gearbox (8) is fixedly mounted on the power box bottom (11), and one end of the worm rod (1301) extends into the turbine gearbox (8); in an initial state, the worm rod (1301) and the turbine in the turbine gearbox (8) are in an unlocked state, and the turbine in the turbine gearbox (8) is connected to the traction wheel (14); the power box cover (10) is fixedly mounted on the power box bottom (11).

2. The electric drain valve device according to claim 1, characterized in that: A first fixing column (1101) and a second fixing column (1102) are provided on the power box bottom (11); The motor bracket (12) comprises: a first limiting hole (1201), a second limiting hole (1202), a bottom plate (1203), a first side plate (1204), a second side plate (1205) and a bending plate (1206); The bending plate (1206) is provided with the first limiting hole (1201), the bottom plate (1203) is provided with the second limiting hole (1202), the first limiting hole (1201) and the second limiting hole (1202) are arranged opposite to each other, the bending plate (1206) is fixedly mounted on the bottom plate (1203), the first side plate (1204) is provided with a hole, and the second side plate (1205) is provided with a slot; The first limiting hole (1201) and the second limiting hole (1202) pass through the first fixing column (1101) to install the motor bracket (12) on the bottom (11) of the power box; the first buckle (901) is engaged with the slot on the second side plate (1205); the motor (13) is fixedly installed on the bottom plate (1203); the worm (1301) passes through the hole on the first side plate (1204); the magnet (15) is fixedly installed on the outer side of the second side plate (1205); The power box cover (10) is fixedly mounted on the power box bottom (11) via the first fixing column (1101) and the second fixing column (1102).

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