Servo motor with good waterproof property

Abstract

The application relates to the technical field of electric machines, in particular to a servo motor with good waterproofness, which comprises the following structure: an outer shell, an airtight cavity is formed in the inner part of the outer shell, a plurality of air inlets and a plurality of air outlets are arranged on the side wall of the outer shell; an inner shell is fixedly arranged in the airtight cavity along the axial direction of the outer shell, a plurality of air inlets and a plurality of air outlets are arranged on the inner shell, the plurality of air inlets and the plurality of air outlets all face the inner cavity top wall of the outer shell; and a motor main body is arranged in the inner part of the inner shell. The air inlets, the air outlets, the air inlets and the air outlets are arranged in a staggered mode, so that the possibility that the water solution splashed into the inner cavity of the outer shell through the air inlets or the air outlets directly enters the inner cavity of the inner shell through the air inlets or the air outlets is reduced, the waterproofness of the equipment is enhanced, the heat dissipation effect of the device is ensured, and the problem of poor heat dissipation effect in the prior art is avoided.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a servo motor with good waterproof performance. Background Technology

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system. It has advantages such as high control precision and flexible electronic commutation, and is widely used in the servo systems of new energy vehicles. High-power servo motors generate a lot of heat during operation. In order to extend the service life of servo motors, those skilled in the art usually use methods such as setting fan blades on the motor shaft and opening heat dissipation holes on the motor housing to dissipate the heat inside the motor. The working environment of servo motors used in new energy vehicles is even harsher, and they generally need to have a certain degree of waterproof performance to prevent splashing mud or rainwater from entering the motor and causing motor circuit failure.

[0003] To address this, those skilled in the art typically employ methods such as removing the heat dissipation holes on the motor housing, installing static sealing mechanisms between the mating surfaces of various components on the motor's exterior, and installing dynamic sealing mechanisms between the motor shaft and the shaft hole to improve the waterproof performance of the servo motor. However, this undoubtedly sacrifices the heat dissipation performance of the servo motor significantly, resulting in poor heat dissipation. Summary of the Invention

[0004] To address the technical problem of poor heat dissipation in existing waterproof servo motors, this invention provides a waterproof servo motor comprising:

[0005] The outer shell has a sealed cavity inside, and several air inlets and several air outlets are opened on the side wall of the outer shell.

[0006] The inner shell is fixedly installed in the sealed cavity along the axial direction of the outer shell. The inner shell has several air inlets and several air outlets, all of which face the top wall of the inner cavity of the outer shell.

[0007] The motor body is located inside the inner casing.

[0008] Furthermore, this device also includes:

[0009] A partition is fixedly installed on the circumferential side wall of the inner shell. The partition separates the cavity between the outer shell and the inner shell to form a first guide cavity and a second guide cavity. The first guide cavity is connected to several air inlets and several air outlets, and the second guide cavity is connected to several air outlets and several air outlets.

[0010] Several fins are fixedly disposed on the circumferential sidewall of the inner shell, and the fins are all fixedly connected to the inner wall of the outer shell.

[0011] The outer surface of the inner shell and the outer surface of the fins are both provided with several pits;

[0012] A pair of drain outlets are provided on the outer wall of the outer shell. The drain outlets are connected to the bottom of the inner cavity of the outer shell. The pair of drain outlets are located on both sides of the partition and are used to discharge the aqueous solution accumulated in the first guide cavity and the second guide cavity.

[0013] A pair of switch assemblies are fixedly mounted on the inner wall of the outer housing. The pair of switch assemblies are respectively matched with the positions of a pair of drain outlets and are used to control the opening and closing of the drain outlets.

[0014] Furthermore, this device also includes:

[0015] The tail end housing is fixedly mounted at the tail end of the outer housing;

[0016] The air intake window is located on the outer wall of the tail housing and is connected to the inner cavity of the tail housing.

[0017] A waterproof and breathable filter element is fixedly installed in the air inlet window to isolate the inner cavity of the tail end housing from the external environment;

[0018] Several blocking modules are installed on the inner wall of the outer shell. The positions of the blocking modules correspond one-to-one with the positions of the air inlets, and are used to control the opening and closing of the air inlets.

[0019] The drive shaft is movably installed in the inner cavity of the tail end housing, and the axis of the drive shaft is collinear with the axis of the motor shaft of the motor body;

[0020] The fan blades are fixedly mounted on the drive shaft;

[0021] Several air inlets are provided on the tail end face of the outer shell, and any one of the air inlets penetrates the outer wall of the outer shell and connects the cavity between the outer shell and the inner shell.

[0022] The transmission module is located in the inner cavity of the tail end housing. The transmission module is connected to the transmission shaft and is used to fix the transmission shaft to the tail end of the motor shaft.

[0023] The air supply module is located in the inner cavity of the tail end housing and is connected to several sealing modules and a transmission module.

[0024] Furthermore, the blocking module includes:

[0025] Several guide rods are fixedly installed on the inner wall of the outer shell;

[0026] A baffle is movably installed in the inner cavity of the outer shell. The position of the baffle corresponds to that of the air inlet. The baffle is slidably connected to several guide rods and is used to close the air inlet.

[0027] The support frame is fixedly mounted on several guide rods;

[0028] The first airbag is fixedly mounted on the support bracket. The first airbag is located between the baffle and the support bracket. The first airbag is fixedly connected to the baffle and is connected to the air supply module to drive the baffle to slide along the guide rod.

[0029] The first vent is located on the first airbag and is used to expel the air inside the first airbag.

[0030] The first spring is fixedly installed inside the first airbag, with both ends of the first spring fixedly connected to the inner wall of the first airbag, and is used to drive the first airbag to contract and reset.

[0031] Furthermore, the transmission module includes:

[0032] The assembly slot is located at the head end of the drive shaft, and the tail end of the motor shaft is movably inserted into the assembly slot.

[0033] The assembly slot consists of an assembly section and a transmission section. The transmission section is located between the assembly section and the tail end of the transmission shaft. The inner cavity of the transmission section is prism-shaped, and the radial cross-sectional shape of the transmission section matches that of the tail end of the motor shaft.

[0034] The first bearing is movably sleeved on the tail end of the motor shaft. The outer ring of the first bearing is fixedly connected to the inner wall of the assembly slot. The first bearing is located in the inner cavity of the assembly section.

[0035] The first movable plate is movably set in the inner cavity of the transmission section, and the first movable plate matches the radial cross-sectional shape of the inner cavity of the transmission section.

[0036] The second spring is set in the inner cavity of the transmission section. The second spring is located between the movable plate and the tail end of the transmission shaft. One end of the second spring is connected to the first movable plate, and the other end of the second spring is connected to the inner wall of the assembly slot, which is used to elastically support the first movable plate.

[0037] The first assembly bracket is fixedly installed on the inner wall of the tail end housing;

[0038] The transmission assembly is mounted on the first mounting bracket. The transmission assembly is connected to the transmission shaft and the air supply module, and is used to drive the transmission shaft to move axially along the motor shaft.

[0039] Furthermore, the transmission assembly includes:

[0040] The assembly protrusion is fixedly mounted on the first assembly bracket and is movably connected to the drive shaft.

[0041] The second bearing is sleeved on the tail end of the drive shaft. The inner ring of the second bearing is fixedly connected to the drive shaft, and the outer ring of the second bearing abuts against the circumferential inner wall of the mounting groove.

[0042] The second airbag is set in the inner cavity of the assembly protrusion. The second airbag is located between the drive shaft and the first assembly bracket. The second airbag is connected to the air supply module.

[0043] The second vent is located on the second airbag and is used to expel air from the inner cavity of the second airbag.

[0044] The second movable plate is movably disposed in the inner cavity of the assembly protrusion, and the second movable plate is located between the drive shaft and the second airbag;

[0045] The thrust ball bearing is movably mounted in the inner cavity of the mounting groove. The seat ring of the thrust ball bearing is fixedly connected to the second movable plate, and the shaft ring of the thrust ball bearing is connected to the tail end of the drive shaft.

[0046] Furthermore, the gas supply module includes:

[0047] The second assembly bracket is fixedly installed on the inner wall of the tail end housing;

[0048] The buffer tank is fixedly mounted on the second assembly bracket. The buffer tank is connected to the first airbag of several sealing modules and is used to supply air to the first airbag.

[0049] A pair of air supply components are mounted on the second mounting bracket. Each air supply component is connected to the buffer tank and the second airbag to supply air to the buffer tank and the second airbag.

[0050] The power unit is mounted on the second mounting bracket and is connected to the air supply unit to drive the air supply unit.

[0051] Furthermore, the gas supply assembly includes:

[0052] The load-bearing frame is fixedly mounted on the second assembly bracket;

[0053] The third airbag is located inside the cavity of the load-bearing frame and is connected to the power unit.

[0054] An air inlet is installed on the third airbag. The air outlet of the air inlet is connected to the inner cavity of the third airbag, and the air inlet of the air inlet is connected to the inner cavity of the tail end shell.

[0055] The first one-way valve, located on the air inlet, is used to restrict the flow direction of the gas passing through the air inlet;

[0056] A pair of air outlets are installed on the third airbag. The air inlet of each pair of air outlets is connected to the inner cavity of the third airbag. The air outlet of one air outlet is connected to the buffer tank, and the air outlet of the other air outlet is connected to the second airbag, which is used to supply air to the buffer tank and the second airbag.

[0057] A pair of second check valves are respectively installed on a pair of gas outlets to restrict the flow direction of gas passing through the gas outlets;

[0058] The first electrically controlled valve is installed on the air outlet connected to the second airbag and is used to control the opening and closing of the air outlet connected to the second airbag.

[0059] Furthermore, the buffer tank includes:

[0060] The tank body is fixedly mounted on the second assembly bracket, and a pair of buffer chambers are provided inside the tank body;

[0061] A pair of guide rods are fixedly installed on the inner walls of a pair of buffer cavities, and the axes of the pair of guide rods are collinear;

[0062] A pair of pistons are movably disposed in a pair of buffer chambers, and the pair of pistons are slidably connected to a pair of guide rods. The radial cross-sectional shape of the pistons matches that of the buffer chambers.

[0063] A pair of return springs are respectively set in a pair of buffer chambers, and a pair of pistons are located between the pair of return springs. One end of the return spring is connected to the piston, and the other end of the return spring is connected to the inner wall of the tank, which is used to elastically support the piston.

[0064] A pair of air inlet pipes are installed on the tank body. The output ends of the pair of air inlet pipes are respectively connected to a pair of buffer chambers. The output ends of the pair of air inlet pipes are located between a pair of pistons. The input ends of the pair of air inlet pipes are respectively connected to a pair of air supply components.

[0065] A pair of second electrically controlled valves are installed on the tank body. The input ends of the pair of second electrically controlled valves are respectively connected to a pair of buffer chambers. The input ends of the pair of second electrically controlled valves are located between a pair of pistons.

[0066] A pair of exhaust pipes are installed on the tank body. The input ends of the pair of exhaust pipes are respectively connected to a pair of buffer chambers. The input ends of the exhaust pipes are located between a pair of pistons. The output ends of the exhaust pipes are connected to the first airbag and are used to supply air to the first airbag.

[0067] A pair of third electrically controlled valves are installed on a pair of exhaust pipes respectively to control the opening and closing of the exhaust pipes;

[0068] A pair of guide tubes are installed on the tank body. The head ends of the pair of guide tubes are respectively connected to a pair of buffer chambers, and a pair of pistons are located between the head ends of the pair of guide tubes.

[0069] A pair of spray pipes are fixedly installed on the inner shell. The main sections of the pair of spray pipes are connected to a pair of guide pipes respectively. Several branch sections of any one spray pipe are attached to the circumferential sidewall of the inner shell. Several water outlets are opened on each branch section of the spray pipe, and any one water outlet faces the circumferential sidewall of the inner shell.

[0070] A pair of third check valves are installed on the main sections of a pair of spray pipes to restrict the flow direction of liquids or gases through the branch sections of the spray pipes.

[0071] A pair of water-drawing pipes are fixedly installed on the inner wall of the outer shell. The water-drawing pipes are located at the bottom of the inner cavity of the outer shell. The output ends of the pair of water-drawing pipes are respectively connected to a pair of guide pipes, which are used to draw out the aqueous solution stored in the cavity between the outer shell and the inner shell.

[0072] A pair of fourth check valves are installed on a pair of pumping pipes to restrict the flow direction of liquids or gases passing through the pumping pipes.

[0073] Furthermore, the powertrain includes:

[0074] A pair of slides are provided on the second assembly bracket, and the pair of slides are arranged in parallel.

[0075] A pair of racks are movably mounted on the second assembly bracket, and the pair of racks are slidably connected to a pair of slide grooves respectively;

[0076] A pair of connectors are fixedly mounted on a pair of racks, and the pair of connectors are connected to a pair of air supply components to drive the operation of the pair of air supply components.

[0077] An assembly shaft is set in the inner cavity of the tail end housing. One end of the assembly shaft is rotatably connected to the second assembly bracket, and the other end of the assembly shaft is rotatably connected to the inner wall of the tail end housing.

[0078] The gear is fixedly sleeved on the assembly shaft. The gear meshes with a pair of racks and is used to drive the pair of racks to slide back and forth along a pair of guide grooves.

[0079] The swing component is movably installed in the inner cavity of the tail end housing. The top end of the swing component is fixedly connected to the assembly shaft and is used to drive the assembly shaft to rotate.

[0080] The servo motor with good waterproof performance according to embodiments of the present invention has the following beneficial effects:

[0081] 1. This device reduces the possibility of aqueous solutions splashed into the inner cavity of the outer shell directly entering the inner cavity of the inner shell through the air inlet or outlet, thereby reducing the likelihood of circuit failure in the motor body. This is achieved by staggering the air inlet and outlet on the outer shell with the air inlet and outlet on the inner shell. This also enhances the waterproof performance of the device and ensures its heat dissipation, avoiding the problem of poor heat dissipation in existing technologies.

[0082] 2. This device is equipped with a sealing module. After the air supply module inflates the first airbag of the sealing module, the expansion of the first airbag squeezes the baffle to seal the air inlet, preventing mud and water brought up by the car during driving from splashing into the inner cavity of the outer shell through the air inlet, thus further enhancing the waterproof performance of this device.

[0083] 3. This equipment features a tail end housing at the rear end of the outer casing. Inside the tail end housing, a drive shaft, fan blades, a transmission module, and an air supply module are housed. The air supply module drives the transmission module to fix the drive shaft to the rear end of the motor shaft. The power of the motor shaft drives the drive shaft and fan blades to rotate synchronously. The rotation of the fan blades overcomes the resistance of the waterproof and breathable filter element to draw in outside air, and the air inside the tail end housing is delivered to the first guide cavity through the air inlet to promote airflow circulation inside the outer casing and ensure the heat dissipation effect of the equipment. Furthermore, this equipment can control the transmission module and the air supply module to fix the drive shaft to the rear end of the motor shaft when needed, and to keep the drive shaft detached from the motor shaft when not needed, thereby saving energy consumption during equipment operation.

[0084] 4. This equipment temporarily stores the gas input from the third airbag to the first airbag by setting up a buffer tank, so that the gas stored in the buffer tank can be input into the first airbag when needed. Furthermore, a second electrically controlled valve is installed on the tank to release the gas in the buffer chamber at regular intervals to prevent the equipment from being damaged due to excessive gas pressure inside the buffer tank. At the same time, it can control the piston to slide back and forth periodically, thereby using the guide pipe and water pumping pipe to draw out the aqueous solution accumulated in the inner cavity of the outer shell and spray it onto the outer surface of the inner shell through the spray pipe, thereby enhancing the heat dissipation effect of this equipment on the inner shell.

[0085] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0086] Figure 1 This is a perspective view of Embodiment 1 according to the present invention (the outer shell is rendered with perspective).

[0087] Figure 2 This is a schematic diagram of the internal structure according to Embodiment 1 of the present invention;

[0088] Figure 3 This is an exploded view of the drainage module according to Embodiment 1 of the present invention;

[0089] Figure 4 This is a perspective view of Embodiment 2 according to the present invention;

[0090] Figure 5 This is a schematic diagram of the internal structure according to Embodiment 2 of the present invention;

[0091] Figure 6 This is an assembly diagram of the transmission module according to Embodiment 2 of the present invention;

[0092] Figure 7 for Figure 6 A magnified view of a portion of region A in the middle;

[0093] Figure 8 This is a cross-sectional view of the transmission shaft according to Embodiment 2 of the present invention;

[0094] Figure 9 This is an exploded view of the blocking module according to Embodiment 2 of the present invention;

[0095] Figure 10 This is an assembly diagram of an air supply assembly according to Embodiment 3 of the present invention (the supporting frame of one of the air supply assemblies is omitted);

[0096] Figure 11 for Figure 10 A magnified view of a portion of region B in the middle;

[0097] Figure 12 This is a schematic diagram of the internal structure of the buffer tank according to Embodiment 3 of the present invention;

[0098] Figure 13 This is a schematic diagram of the assembly of the power component according to Embodiment 4 of the present invention.

[0099] Explanation of reference numerals in the attached diagram:

[0100] 1-Outer shell, 11-Air inlet, 12-Air outlet, 13-Air inlet hole, 2-Inner shell, 21-Air inlet, 22-Air outlet, 23-Baffle, 241-First guide cavity, 242-Second guide cavity, 24-Fin, 25-Motor shaft, 31-Drain outlet, 32-Switch assembly, 321-Linear module, 322-Gate, 4-Tail end shell, 41-Waterproof and breathable filter element, 5-Sealing module, 51-Guide rod, 52-Baffle, 53-Bearing bracket, 54-First airbag, 6-Drive shaft, 61-Fan blade, 7-Drive module, 71-Assembly slot, 711-Assembly section, 712-Drive section, 72-First bearing, 73-First movable plate, 74-Second spring, 75-First assembly bracket, 761-Assembly groove, 762-Second bearing, 763-Second Airbag, 764-Second movable plate, 765-Thrust ball bearing, 8-Air supply module, 81-Second assembly bracket, 821-Bearing frame, 822-Third airbag, 823-Air inlet, 824-Air outlet, 8241-First electrically controlled valve, 831-Slide groove, 832-Rack, 833-Connector, 834-Assembly shaft, 835-Gear, 836-Swing component, 84-Buffer tank 841-Tank body, 842-Buffer chamber, 843-Guide rod, 844-Piston, 845-Reset spring, 846-Inlet pipe, 847-Second solenoid valve, 848-Exhaust pipe, 849-Third solenoid valve, 850-Guide pipe, 851-Spray pipe, 8511-Branch section, 8512-Main section, 852-Third check valve, 853-Water suction pipe, 854-Fourth check valve. Detailed Implementation

[0101] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0102] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0103] Example 1

[0104] Specifically, such as Figure 1 , 2As shown, an embodiment of the present invention discloses a waterproof servo motor, comprising: an outer housing 1 with an air inlet 11, an air outlet 12, an air inlet 21, an air outlet 22, an inner housing 2, and a motor body (not shown in the figure); the outer housing 1 has a sealed cavity inside, and several air inlets 11 and several air outlets 12 are provided on the side walls on the left and right sides of the outer housing; the inner housing 2 is fixedly disposed in the sealed cavity along the axial direction of the outer housing 1, and the end faces of the front and rear ends of the inner housing 2 are fixedly connected to the inner wall located at the head end and the inner wall located at the tail end of the outer housing 1, respectively, so that the inner cavity of the inner housing 2 forms a closed cavity. The side housing 2 has multiple air inlets 21 and air outlets 22 that communicate with the inner cavity of the inner housing 2, and several air inlets 21 and several air outlets 22 face the top wall of the inner cavity of the outer housing 1; the motor body is located inside the inner housing 2, and the head end of the motor shaft 25 of the motor body extends out of the head end face of the outer housing 1; in this embodiment, by staggering the air inlets 11 and air outlets 12 on the outer housing 1 with the air inlets 21 and air outlets 22 on the inner housing 2, the water solution splashes into the inner cavity of the inner housing 2, causing the motor body to malfunction, thereby enhancing the waterproof performance of this device.

[0105] Furthermore, such as Figures 1-3As shown, the device further includes: a partition 23, a first guide cavity 241, a second guide cavity 242, a plurality of fins 24, a pair of drain outlets, and a pair of switch assemblies; the partition 23 is fixedly disposed on the circumferential sidewall of the inner housing 2, and the outer circumferential edge of the partition 23 is fixedly connected to the inner wall of the outer housing 1, thereby separating the cavity between the outer housing 1 and the inner housing 2 to form the first guide cavity 241 and the second guide cavity 242. The first guide cavity 241 connects to a plurality of air inlets 11 and a plurality of air outlets 21, and the second guide cavity 242 connects to a plurality of air outlets 12 and a plurality of air outlets 22; a plurality of fins 24 are fixedly disposed on the circumferential sidewall of the inner housing 2, and the plurality of fins 24 are all fixedly connected to the inner wall of the outer housing 1. Any air inlet 21 or air outlet 22 is located between a pair of adjacent fins 24, so as to utilize the fins 24 to control the air inlet 21 and the air outlet 22. The air outlet 22 is blocked to prevent the aqueous solution from splashing into the inner cavity of the inner shell 2 through the air inlet 21 or the air outlet 22. In this embodiment, the fins 24, the inner shell 2, and the outer shell 1 are all made of metal materials with high thermal conductivity. The outer surface of the inner shell 2 and the outer surface of the fins 24 are provided with several pits to enhance the adhesion of the aqueous solution to the outer surfaces of the inner shell 2 and the fins 24, so that the aqueous solution entering the inner cavity of the outer shell 1 through the air inlet 11 or the air outlet 12 can adhere to the outer surface of the inner shell 2 or the fins 24 and absorb the heat of the inner shell 2 by evaporation of the aqueous solution. A pair of drain outlets 31 are opened on the outer wall of the outer shell 1 and are connected to the bottom of the inner cavity of the outer shell 1. The pair of drain outlets 31 are arranged on both sides of the partition 23 and are used to discharge the aqueous solution stored in the first guide cavity 241 and the second guide cavity 242.

[0106] A pair of switch assemblies 32 are fixedly mounted on the inner wall of the outer housing 1. The pair of switch assemblies 32 are respectively matched with the positions of a pair of drain outlets 31 and are used to control the opening and closing of the drain outlets 31.

[0107] Preferred, such as Figures 1-3 As shown, the switch assembly 32 includes: a pair of linear modules 321 and a gate 322; the pair of linear modules 321 are fixedly disposed on the inner cavity bottom wall of the outer housing 1 and are arranged on both sides of the drain outlet 31; the gate 322 is slidably disposed on the inner cavity bottom wall of the outer housing 1 and connected to the actuating end of the pair of linear modules 321, for blocking the drain outlet 31.

[0108] When the device is running, the airflow flows into the first guide cavity 241 through the air inlet 11, and then into the inner cavity of the inner housing 2 through the air inlet 21. Then, the airflow flows out to the second guide cavity 242 through the air outlet 22, and then out to the external environment through the air outlet 12. When the aqueous solution splashes into the inner cavity of the outer housing 1 through the air inlet 11 or the air outlet 12, it is blocked by the inner housing 2 and the fins 24, and slides down along the outer wall of the inner housing 2 and the guide of the fins 24 and accumulates at the bottom of the inner cavity of the outer housing 1. The user can control the linear module 321 to drive the gate 322 to slide, thereby opening the drain outlet 31 and draining the aqueous solution accumulated at the bottom of the inner cavity of the outer housing 1.

[0109] Example 2

[0110] Specifically, such as Figure 1 , 2 As shown in Figures 4-7, this embodiment, based on Embodiment 1, further includes: a tail end housing 4, an air inlet window (not shown in the figure), a waterproof and breathable filter element 41, several sealing modules 5, a drive shaft 6, a fan blade 61, several air inlets 13, a transmission module 7, and an air supply module 8; the tail end housing 4 is fixedly disposed at the tail end of the outer housing 1; the air inlet window is opened on the outer wall of the tail end housing 4, and the air inlet window communicates with the inner cavity of the tail end housing 4; the waterproof and breathable filter element 41 is fixedly disposed in the air inlet window to isolate the inner cavity of the tail end housing 4 from the external environment; several sealing modules 5 are disposed on the inner wall of the outer housing 1, and the positions of several sealing modules 5 correspond one-to-one with several air inlets 11 to control the air inlets 11. The device includes a switch for the drive shaft 6, which is movably disposed in the inner cavity of the tail end housing 4. The axis of the drive shaft 6 is collinear with the axis of the motor shaft 25 of the motor body. The fan blade 61 is fixedly sleeved on the drive shaft 6. Several air inlets 13 are opened on the tail end face of the outer housing 1. Any one of the air inlets 13 penetrates the outer wall of the outer housing 1 and connects the cavity between the outer housing 1 and the inner housing 2. The transmission module 7 is disposed in the inner cavity of the tail end housing 4 and is connected to the drive shaft 6. It is used to fix the drive shaft 6 to the tail end of the motor shaft 25. The air supply module 8 is disposed in the inner cavity of the tail end housing 4 and is connected to several sealing modules 5 and the transmission module 7. In this embodiment, the air supply module 8 can be an air pump.

[0111] Furthermore, such as Figure 1 , 2As shown in Figures 4, 5, and 9, the sealing module 5 includes: several guide rods 51, a baffle 52, a support bracket 53, a first airbag 54, a first air outlet (not shown in the figure), and a first spring (not shown in the figure); the several guide rods 51 are fixedly mounted on the inner wall of the outer shell 1; the baffle 52 is movably mounted in the inner cavity of the outer shell 1, the position of the baffle 52 corresponds to the air inlet 11, and the baffle 52 is slidably connected to the several guide rods 51 to seal the air inlet 11; the support bracket 53 is fixedly mounted on the several guide rods 51; the first airbag 54 is fixedly mounted on the support bracket 53, the first airbag 54 is located between the baffle 52 and the support bracket 53, the first airbag 54 is fixedly connected to the baffle 52, and the first airbag 54 is connected to the air supply module 8. Connected to drive the baffle 52 to slide along the guide rod 51; the first air outlet is opened on the outer wall of the first airbag 54 facing the inner shell 2, and the first air outlet is connected to the inner cavity of the first airbag 54. The maximum efficiency of the first air outlet in exhausting air is less than the maximum efficiency of the air supply module 8 in inflating the first airbag 54. It is used to exhaust the air inside the first airbag 54. In addition, the gas flowing out through the first air outlet blows towards the outer surface of the inner shell 2, which is beneficial to promote the evaporation and heat absorption of the aqueous solution attached to the outer surface of the inner shell, and can also promote the air flow inside the first guide cavity 241; the first spring is fixedly installed inside the first airbag 54, and both ends of the first spring are fixedly connected to the inner wall of the first airbag 54. It is used to drive the first airbag 54 to contract and reset.

[0112] Furthermore, such as Figure 1 , 2As shown in Figures 4-8, the transmission module 7 includes: an assembly slot 71, an assembly section 711, a transmission section 712, a first bearing 72, a first movable plate 73, a second spring 74, a first assembly bracket 75, and a transmission assembly. The assembly slot 71 is located at the head end of the transmission shaft 6, and the tail end of the motor shaft 25 is movably connected to the assembly slot 71. The assembly slot 71 is composed of the assembly section 711 and the transmission section 712. The transmission section 712 is located between the assembly section 711 and the tail end of the transmission shaft 6. The inner cavity of the transmission section 712 is prism-shaped, and the radial cross-sectional shape of the transmission section 712 matches the tail end of the motor shaft 25. The first bearing 72 is movably sleeved on the tail end of the motor shaft 25. The outer ring of the first bearing 72 is fixedly connected to the inner wall of the assembly slot 71. The first bearing 72 is located in the inner cavity of the assembly section 711. Preferably, in this embodiment, the radial cross-sectional shape of the inner ring of the first bearing 72 matches the radial cross-sectional shape of the tail end of the motor shaft 25. The tail end of the motor shaft 25 is movably inserted into the inner cavity of the inner ring of the first bearing 72 to achieve the purpose of simultaneously providing rotational and sliding support for the transmission shaft 6 using the first bearing 72. The first movable plate 73 is movably disposed in the inner cavity of the transmission section 712. The first movable plate 73 is arranged radially along the transmission shaft 6, and the radial cross-sectional shape of the first movable plate 73 matches that of the inner cavity of the transmission section 712. The second spring 74 is disposed in the inner cavity of the transmission section 712. The second spring 74 is located between the first movable plate 73 and the tail end of the transmission shaft 6. One end of the second spring 74 is connected to the first movable plate 73, and the other end of the second spring 74 is connected to the inner wall of the mounting slot 71 for elastic support of the first movable plate 73. The first mounting bracket 75 is fixedly disposed on the inner wall of the tail end housing 4. The transmission assembly is disposed on the first mounting bracket 75. The transmission assembly is connected to the transmission shaft 6 and the air supply module 8 for driving the transmission shaft 6 to move axially along the motor shaft 25.

[0113] Furthermore, such as Figure 1 , 2As shown in Figures 4-8, the transmission assembly includes: an assembly groove 761, a second bearing 762, a second air bladder 763, a second air outlet (not shown in the figure), a second movable plate 764, and a thrust ball bearing 765. The assembly groove 761 is fixedly mounted on the first assembly bracket 75 and is movably inserted into the transmission shaft 6. The second bearing 762 is sleeved on the tail end of the transmission shaft 6, with its inner ring fixedly connected to the transmission shaft 6. The outer ring surface of the outer ring of the second bearing 762 is in contact with the circumferential inner wall of the assembly groove 761, so as to achieve the purpose of simultaneously providing rotational support and sliding support for the transmission shaft 6 using the second bearing 762. The second air bladder 763 is disposed in the inner cavity of the assembly groove 761. In this configuration, the second airbag 763 is located between the drive shaft 6 and the first mounting bracket 75, and is connected to the air supply module 8. A second air outlet is formed on the second airbag 763; the exhaust efficiency of the second air outlet is less than the inflation efficiency of the air supply module 8 into the second airbag 763, and is used to expel air from the inner cavity of the second airbag 763. A second movable plate 764 is movably disposed within the inner cavity of the mounting protrusion 761, and is located between the drive shaft 6 and the second airbag 763. A thrust ball bearing 765 is movably disposed within the inner cavity of the mounting protrusion 761, and its seat ring is fixedly connected to the second movable plate 764. The shaft ring of the thrust ball bearing 765 is connected to the tail end of the drive shaft 6.

[0114] During equipment operation, the user can control the air supply module 8 to inflate the first airbag 54 of the sealing module 5, causing the first airbag 54 to expand against the elastic force of the first spring. After the first airbag 54 inflates, it pushes the baffle 52 to slide along the guide rod 51 toward the air inlet 11 until the baffle 52 abuts against the inner wall of the outer shell, sealing the air inlet 11 to prevent the aqueous solution from entering the inner cavity of the outer shell 1 through the air inlet 11. During the inflation of the first airbag 54, some of the air inside the first airbag 54 is discharged through the first air outlet. At the same time, the air supply module 8 inflates the second airbag 763 of the transmission module 7, causing the second airbag 763 to inflate. During the inflation of the second airbag 763... By pushing the second movable plate 764 and the thrust ball bearing 765, the transmission shaft 6 extends towards the motor shaft 25 until the tail end of the motor shaft 25 is inserted into the transmission section 712 of the assembly slot 71. This causes the transmission shaft 6 and the fan blade 61 to rotate synchronously with the motor shaft 25 under the drive of the motor shaft 25. In turn, by driving the fan blade 61 to rotate, outside air is drawn into the inner cavity of the tail end housing 4 through the waterproof and breathable filter element 41. The air in the inner cavity of the tail end housing 4 is blown into the first guide cavity 241 through the air inlet 13, which promotes the air circulation inside the first guide cavity 241, accelerates the evaporation and heat absorption of the aqueous solution attached to the outer wall surface of the inner housing 2 and the fins 24, and at the same time overcomes the resistance of the waterproof and breathable filter element 41 to draw in outside air, ensuring the heat dissipation effect of the motor.

[0115] Example 3

[0116] Specifically, such as Figure 1 , 2 As shown in Figures 4 to 7 and 10, this embodiment is based on Embodiment 2, but differs in that it further discloses an air supply module 8. The air supply module 8 includes: a second assembly bracket 81, a pair of air supply components, a power component, and a buffer tank 84. The second assembly bracket 81 is fixedly mounted on the inner wall of the tail end housing 4. The buffer tank 84 is fixedly mounted on the second assembly bracket 81 and is connected to the first airbags 54 of several sealing modules 5 for supplying air to the first airbags 54. A pair of air supply components are mounted on the second assembly bracket 81, and any one of the air supply components is simultaneously connected to the buffer tank 84 and the second airbag 763 of the transmission module 7 for supplying air to the buffer tank 84 and the second airbag 763. The power component is mounted on the second assembly bracket 81 and is connected to the air supply components for driving the air supply components. In this embodiment, the power component can be a linear drive device to drive the air supply components, wherein the linear drive device includes, but is not limited to, a ball screw type linear module.

[0117] Furthermore, such as Figure 1 , 2 As shown in Figures 4-7 and 10-12, the air supply assembly includes: a support frame 821, a third airbag 822, an air inlet 823, a first one-way valve (not shown in the figure), a pair of air outlets 824, a second one-way valve (not shown in the figure), and a first electrically controlled valve 8241; the support frame 821 is fixedly mounted on the second mounting bracket 81; the third airbag 822 is disposed in the inner cavity of the support frame 821 and is connected to the power assembly; the air inlet 823 is disposed on the third airbag 822, with the air outlet end of the air inlet 823 communicating with the inner cavity of the third airbag 822 and the air inlet end of the air inlet 823 communicating with the inner cavity of the tail end housing 4; the first one-way valve is disposed on the air inlet 823 to restrict the flow direction of the gas flowing through the air inlet 823, so that external air can only flow into the third airbag 823 through the air inlet 823. The inner cavity of the third airbag 822 is provided with a pair of air outlets 824. The air inlet of each pair of air outlets 824 is connected to the inner cavity of the third airbag 822. The air outlet of one air outlet 824 is connected to the buffer tank 84, and the air outlet of the other air outlet 824 is connected to the second airbag 763 of the transmission module 7, which is used to supply air to the buffer tank 84 and the second airbag 763 of the transmission module 7. A pair of second one-way valves are respectively provided on the pair of air outlets 824, which are used to restrict the flow direction of the gas flowing through the air outlets 824. The gas in the third airbag 823 can only flow out of the inner cavity of the third airbag 823 through the pair of air outlets 824. A first electric control valve 8241 is provided on the air outlet 824 connected to the second airbag 763, which is used to control the opening and closing of the air outlet 824 connected to the second airbag 763.

[0118] Furthermore, such as Figure 6 , 10As shown in Figures 11 and 12, the buffer tank 84 includes: a tank body 841, a pair of buffer chambers 842, a pair of guide rods 843, a pair of pistons 844, a pair of return springs 845, a pair of air inlet pipes 846, a pair of second electrically controlled valves 847, a pair of exhaust pipes 848, a pair of third electrically controlled valves 849, a pair of guide pipes 850, a pair of spray pipes 851, a pair of third one-way valves 852, a pair of water suction pipes 853, and a pair of fourth one-way valves 854; the tank body 841 is fixedly mounted on the second mounting bracket 81, and a pair of buffer chambers 842 are provided inside the tank body 841; the pair of guide rods 843 are respectively fixedly mounted on the inner walls of the pair of buffer chambers 842, and the axes of the pair of guide rods 843 are collinear; the pair of pistons 844 are respectively movably mounted on the pair of buffer chambers 842. In the impingement chamber 842, a pair of pistons 844 are slidably connected to a pair of guide rods 843, and the radial cross-sectional shape of the pistons 844 matches that of the buffer chamber 842. A pair of return springs 845 are respectively disposed in a pair of buffer chambers 842, and the pair of pistons 844 are located between the pair of return springs 845. One end of the return spring 845 is connected to the piston 844, and the other end of the return spring 845 is connected to the inner wall of the tank body 841 for elastic support of the pistons 844. A pair of air inlet pipes 846 are disposed on the tank body 841. The output ends of the pair of air inlet pipes 846 are respectively connected to a pair of buffer chambers 842, and the output ends of the pair of air inlet pipes 846 are located between the pair of pistons 844. The input ends of the pair of air inlet pipes 846 are respectively connected to the third airbags 8 of a pair of air supply components. The outlet 824 of valve 22 is connected to supply air to the buffer chamber 842; a pair of second electrically controlled valves 847 are installed on the tank body 841, with their input ends connected to the pair of buffer chambers 842 respectively, and their input ends located between the pair of pistons 844, for discharging gas from the buffer chambers 842; a pair of exhaust pipes 848 are installed on the tank body 841, with their input ends connected to the pair of buffer chambers 842 respectively, and their input ends located between the pair of pistons 844, and their output ends connected to the first airbag 54, for supplying air to the first airbag 54; a pair of third electrically controlled valves 849 are installed on the pair of exhaust pipes 848 respectively, for controlling the exhaust pipes 848. 8. The opening and closing of the flow channels; a pair of guide pipes 850 are installed on the tank body 841, and the head ends of the pair of guide pipes 850 are respectively connected to a pair of buffer chambers 842. A pair of pistons 844 are located between the head ends of the pair of guide pipes 850; a pair of spray pipes 851 are fixedly installed on the inner shell 2, and the main sections 8512 of the pair of spray pipes 851 are respectively connected to a pair of guide pipes 850. Several branch sections 8511 of any spray pipe 851 are attached to the circumferential sidewall of the inner shell 2. Each branch section 8511 of the spray pipe 851 is located between a pair of adjacent fins 24. Several water outlets (not shown in the figure) are opened on the branch sections 8511 of the spray pipe 851, and any water outlet faces the circumferential sidewall of the inner shell 2.A pair of third check valves 852 are respectively installed on the main section 8512 of a pair of spray pipes 851 to restrict the flow direction of liquid or gas through the branch section 8511 of the spray pipes 851, so that the branch section 8511 of the spray pipes 851 can only be used to discharge gas or liquid in the inner cavity of the main section 8512 of the spray pipes 851; a pair of water suction pipes 853 are fixedly installed on the inner wall of the outer shell 1, and the water suction pipes 853 are located at the bottom of the inner cavity of the outer shell 1. The output ends are connected to a pair of guide pipes 850. Each pumping pipe 853 has multiple inlet holes (not shown in the figure) on its circumferential sidewall that communicate with the inner cavity of the pumping pipe 853, used to extract the aqueous solution accumulated in the cavity between the outer shell 1 and the inner shell 2. A pair of fourth check valves 854 are respectively installed on the pair of pumping pipes 853 to restrict the flow direction of liquid or gas through the pumping pipes 853, ensuring that the pumping pipes 853 can only be used to transfer gas or liquid within the guide pipes 850.

[0119] When the device is running, the power unit drives the third airbag 822 to reciprocate in and out. During the extension of the third airbag 822, air is drawn into the inner cavity of the tail end housing 4 through the air inlet 823. During the contraction of the third airbag 822, the air inside the third airbag 822 is injected into the inner cavity of the first airbag 54 and the pair of buffer chambers 842 of the buffer tank 8484 through a pair of air outlets 824. After the air intake pipe 846 injects into the buffer chamber 842, it is then injected into the first airbag 54 through the exhaust pipe 848 to inflate the first airbag 54 and the second airbag 763. Since the exhaust efficiency of the first air outlet is less than the inflation efficiency of the air intake pipe 846, as the inflation time of the air intake pipe 846 into the buffer chamber 842 increases, the air pressure on the side of the piston 844 facing away from the guide pipe 850 also increases, thereby driving the piston 844 towards the guide pipe 850. During the sliding process, the second electrically controlled valve 847 opens periodically to release some gas in the buffer chamber 842 located on the side of the piston 844 facing away from the guide tube 850. This causes the second piston 844 to slide away from the guide tube 850 under the force of the return spring 845 when the second electrically controlled valve 847 is open. When the second electrically controlled valve 847 is closed, the piston 844 faces the guide tube under the inflation pressure of the third airbag 822. 850 slides on one side; during the periodic reciprocating sliding of piston 844 along guide rod 843, the air pressure environment in the inner cavity of guide tube 850 periodically switches between positive pressure environment and negative pressure environment state, thereby continuously drawing the aqueous solution accumulated in the first guide cavity 241 and the second guide cavity 242 through water pumping pipe 853, and spraying it onto the circumferential side wall of inner shell 2 through branch section 8511 of spray pipe 851, so as to further enhance the cooling effect on inner shell 2.

[0120] In this embodiment, the user can control the first solenoid valve 8241 to close the air outlet 824 connected to the second airbag 763 and control the third solenoid valve 849 to close the exhaust pipe 848 connected to the first airbag 54, thereby stopping the air supply to the first airbag 54 and the second airbag 763. This causes the first airbag 54 to discharge its internal air through the first air outlet under the elastic force of the first spring, driving the baffle 52 to slide back to its original position along the guide rod 51, thus opening the air inlet 11. At the same time, the second airbag 763 discharges its internal air through the second air outlet under the elastic force of the second spring 74, thereby causing the tail end of the motor shaft 25 to disengage from the transmission section 712 of the mounting slot 71, cutting off the torque transmission between the transmission shaft 6 and the motor shaft 25, reducing the load on the motor shaft 25, and reducing the operating energy consumption of the device.

[0121] Example 4

[0122] Specifically, such as Figure 1 , 2 As shown in Figures 4, 5, and 12, this embodiment is based on Embodiment 3, but differs in that it further discloses a power assembly. The power assembly includes: a pair of sliding grooves 831 formed on the second mounting bracket 81, arranged in parallel; a pair of racks 832 slidably connected to the pair of sliding grooves 831; a pair of connecting members 833 fixedly mounted on the pair of racks 832, the connecting members 833 being connected to the third airbags 822 of the pair of air supply assemblies, used to drive the third airbags 822 to extend or retract; and an assembly shaft 834 disposed on the tail end housing 4. Inside the cavity, one end of the assembly shaft 834 is rotatably connected to the second assembly bracket 81, and the other end of the assembly shaft 834 is rotatably connected to the inner wall of the tail end housing 4; the gear 835 is fixedly sleeved on the assembly shaft 834, and the gear 835 meshes with a pair of racks 832, which is used to drive the pair of racks 832 to slide back and forth along the guide of a pair of sliding grooves 831 respectively; the swing member 836 is set in the inner cavity of the tail end housing 4, the top end of the swing member 836 is fixedly connected to the assembly shaft 834, and the center of gravity of the swing member 836 is located at the bottom end of the swing member 836, which is used to drive the assembly shaft 834 to rotate.

[0123] During vehicle operation, the swing component 836 swings under the action of external force, thereby driving the assembly shaft 834 and gear 835 to rotate. During the rotation of gear 835, it meshes with rack 832, causing rack 832 to slide back and forth along the sliding guide. Then, the connecting component 833 set on rack 832 alternately drives the third airbag 822 to reciprocate to extend and retract. In this embodiment, the swing component 836 absorbs the kinetic energy generated during vehicle operation and converts it into mechanical energy to drive the assembly shaft 834 to rotate, further saving the operating energy consumption of this equipment.

[0124] Above, refer to Figures 1-13 A waterproof servo motor according to an embodiment of the present invention is described, which has the following beneficial effects:

[0125] 1. This device reduces the possibility of aqueous solution splashed into the inner cavity of the outer shell 1 through the air inlet 11 or the air outlet 12 directly entering the inner cavity of the inner shell 2 through the air inlet 21 or the air outlet 22, thereby reducing the possibility of circuit failure of the motor body caused by the direct entry of aqueous solution into the inner cavity of the inner shell 2 through the air inlet 21 or the air outlet 22. This enhances the waterproof performance of the device and ensures the heat dissipation effect of the device, avoiding the problem of poor heat dissipation in the prior art.

[0126] 2. By setting up a sealing module 5, after the air supply module 8 inflates the first airbag 54 of the sealing module 5, the first airbag 54 expands and squeezes the baffle 52 to seal the air inlet 11, so as to prevent mud and water brought up by the car during driving from splashing into the inner cavity of the outer shell 1 through the air inlet 11, thereby further enhancing the waterproof performance of the device.

[0127] 3. This equipment has a tail end housing 4 at the tail end of the outer housing 1, and a drive shaft 6, fan blades 61, a transmission module 7, and an air supply module 8 are installed inside the tail end housing 4. The air supply module 8 drives the transmission module 7 to fix the drive shaft 6 to the tail end of the motor shaft 25. The power of the motor shaft 25 drives the drive shaft 6 and the fan blades 61 to rotate synchronously. The rotation of the fan blades 61 overcomes the resistance of the waterproof and breathable filter element 41 to draw in outside air, and delivers the air in the tail end housing 4 to the first guide cavity 241 through the air inlet 13 to promote airflow circulation inside the outer housing 1 and ensure the heat dissipation effect of the equipment. Secondly, the equipment can control the transmission module 7 and the air supply module 8 to fix the drive shaft 6 to the tail end of the motor shaft 25 when needed, and keep the drive shaft 6 and the motor shaft 25 disconnected when not needed to save energy consumption during equipment operation.

[0128] 4. This device temporarily stores the gas input from the third airbag 822 into the first airbag 54 by setting a buffer tank 84, so that the gas stored in the buffer tank 84 can be input into the first airbag 54 when needed. Furthermore, by setting a second electrically controlled valve 847 on the tank body 841, the gas in the buffer chamber 842 is released at regular intervals to prevent the internal air pressure of the buffer tank 84 from becoming too high. At the same time, it can control the piston 844 to slide back and forth periodically, thereby using the guide pipe 850 and the water suction pipe 853 to extract the aqueous solution accumulated in the inner cavity of the outer shell 1 and spray it onto the outer surface of the inner shell 2 through the spray pipe 851, thereby enhancing the heat dissipation effect of this device on the inner shell 2.

[0129] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0130] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A servo motor with good waterproof performance, characterized in that, Include: The outer shell has a sealed cavity inside, and the side wall of the outer shell has several air inlets and several air outlets. An inner shell is fixedly disposed in the sealed cavity along the axial direction of the outer shell. The inner shell has a plurality of air inlets and a plurality of air outlets, all of which face the top wall of the inner cavity of the outer shell. The motor body is located inside the inner housing. Also includes: A partition is fixedly installed on the circumferential side wall of the inner shell. The partition separates the cavity between the outer shell and the inner shell to form a first guide cavity and a second guide cavity. The first guide cavity connects the plurality of air inlets and the plurality of air outlets, and the second guide cavity connects the plurality of air outlets and the plurality of air outlets. Several fins are fixedly disposed on the circumferential sidewall of the inner shell, and the several fins are all fixedly connected to the inner wall of the outer shell. The outer surface of the inner shell and the outer surface of the fins are both provided with a number of pits; A pair of drain outlets are provided on the outer wall of the outer shell. The drain outlets are connected to the bottom of the inner cavity of the outer shell. The pair of drain outlets are located on both sides of the partition and are used to discharge the aqueous solution stored in the first guide cavity and the second guide cavity. A pair of switch assemblies are fixedly mounted on the inner wall of the outer housing. The pair of switch assemblies are respectively matched with the positions of the pair of drain outlets and are used to control the opening and closing of the drain outlets.

2. The servo motor with good waterproof performance as described in claim 1, characterized in that, Also includes: The tail end housing is fixedly disposed at the tail end of the outer housing; An air intake window is provided on the outer wall of the tail end housing, and the air intake window communicates with the inner cavity of the tail end housing; A waterproof and breathable filter element is fixedly installed in the air inlet window to isolate the inner cavity of the tail end housing from the external environment; Several blocking modules are disposed on the inner wall of the outer shell, and the positions of the several blocking modules correspond one-to-one with the positions of the several air inlets, which are used to control the opening and closing of the air inlets; A drive shaft is movably disposed in the inner cavity of the tail end housing, and the axis of the drive shaft is collinear with the axis of the motor shaft of the motor body; The fan blades are fixedly sleeved on the drive shaft; Several air inlets are provided on the tail end face of the outer housing, and any one of the air inlets penetrates the outer wall of the outer housing and connects the cavity between the outer housing and the inner housing; A transmission module is disposed in the inner cavity of the tail end housing. The transmission module is connected to the transmission shaft and is used to fix the transmission shaft to the tail end of the motor shaft. An air supply module is disposed in the inner cavity of the tail end housing, and the air supply module is connected to the plurality of sealing modules and the transmission module.

3. The servo motor with good waterproof performance as described in claim 2, characterized in that, The blocking module includes: Several guide rods are fixedly installed on the inner wall of the outer shell; A baffle is movably disposed in the inner cavity of the outer shell, the baffle is positioned corresponding to the air inlet, and the baffle is slidably connected to the plurality of guide rods for sealing the air inlet; The support bracket is fixedly mounted on the plurality of guide rods; The first airbag is fixedly mounted on the support bracket. The first airbag is located between the baffle and the support bracket. The first airbag is fixedly connected to the baffle and is connected to the air supply module. It is used to drive the baffle to slide along the guide rod. The first vent is located on the first airbag and is used to expel air from inside the first airbag. A first spring is fixedly disposed inside the first airbag, with both ends of the first spring being fixedly connected to the inner wall of the first airbag, for driving the first airbag to contract and reset.

4. The servo motor with good waterproof performance as described in claim 3, characterized in that, The transmission module includes: An assembly slot is provided at the head end of the drive shaft, and the tail end of the motor shaft is movably inserted into the assembly slot; The assembly slot consists of an assembly section and a transmission section. The transmission section is located between the assembly section and the tail end of the transmission shaft. The inner cavity of the transmission section is prism-shaped, and the radial cross-sectional shape of the transmission section matches that of the tail end of the motor shaft. The first bearing is movably sleeved on the tail end of the motor shaft. The outer ring of the first bearing is fixedly connected to the inner wall of the assembly slot. The first bearing is located in the inner cavity of the assembly section. A first movable plate is movably disposed in the inner cavity of the transmission section, and the first movable plate matches the radial cross-sectional shape of the inner cavity of the transmission section; A second spring is disposed in the inner cavity of the transmission section. The second spring is located between the movable plate and the tail end of the transmission shaft. One end of the second spring is connected to the first movable plate, and the other end of the second spring is connected to the inner wall of the assembly slot, for elastic support of the first movable plate. The first assembly bracket is fixedly installed on the inner wall of the tail end housing; A transmission assembly is mounted on the first mounting bracket. The transmission assembly is connected to the transmission shaft and the air supply module, and is used to drive the transmission shaft to move axially along the motor shaft.

5. A servo motor with good waterproof performance as described in claim 4, characterized in that, The transmission assembly includes: An assembly protrusion is fixedly mounted on the first assembly bracket, and the assembly protrusion is movably inserted into the drive shaft. The second bearing is sleeved on the tail end of the drive shaft. The inner ring of the second bearing is fixedly connected to the drive shaft, and the outer ring of the second bearing abuts against the circumferential inner wall of the mounting groove. The second airbag is disposed in the inner cavity of the assembly protrusion. The second airbag is located between the drive shaft and the first assembly bracket. The second airbag is connected to the air supply module. The second vent is located on the second airbag and is used to expel air from the inner cavity of the second airbag. The second movable plate is movably disposed in the inner cavity of the assembly protrusion, and the second movable plate is located between the drive shaft and the second airbag; A thrust ball bearing is movably disposed in the inner cavity of the mounting groove. The seat ring of the thrust ball bearing is fixedly connected to the second movable plate, and the shaft ring of the thrust ball bearing is connected to the tail end of the transmission shaft.

6. The servo motor with good waterproof performance as described in claim 5, characterized in that, The gas supply module includes: The second assembly bracket is fixedly installed on the inner wall of the tail end housing; A buffer tank is fixedly mounted on the second assembly bracket. The buffer tank is connected to the first airbag of the plurality of sealing modules and is used to supply air to the first airbag. A pair of air supply components are mounted on the second assembly bracket, and each of the air supply components is connected to the buffer tank and the second airbag for supplying air to the buffer tank and the second airbag. A power unit is mounted on the second mounting bracket and is connected to the air supply unit to drive the air supply unit.

7. A servo motor with good waterproof performance as described in claim 6, characterized in that, The gas supply assembly includes: The supporting frame is fixedly mounted on the second assembly bracket; A third airbag is disposed in the inner cavity of the support frame and is connected to the power assembly; An air inlet is provided on the third airbag, with the air outlet end of the air inlet communicating with the inner cavity of the third airbag and the air inlet end communicating with the inner cavity of the tail end housing. A first one-way valve is disposed on the air inlet and is used to restrict the flow direction of the gas flowing through the air inlet; A pair of air outlets are provided on the third airbag. The air inlet ends of the pair of air outlets are connected to the inner cavity of the third airbag. The air outlet end of one of the air outlets is connected to the buffer tank, and the air outlet end of the other air outlet is connected to the second airbag, for supplying air to the buffer tank and the second airbag. A pair of second one-way valves are respectively disposed on the pair of gas outlets to restrict the flow direction of gas flowing through the gas outlets; A first electrically controlled valve is disposed on the air outlet connected to the second airbag, and is used to control the opening and closing of the air outlet connected to the second airbag.

8. A servo motor with good waterproof performance as described in claim 7, characterized in that, The buffer tank contains: The tank body is fixedly mounted on the second assembly bracket, and a pair of buffer chambers are provided inside the tank body; A pair of guide rods are fixedly installed on the inner walls of the pair of buffer cavities, and the axes of the pair of guide rods are collinear; A pair of pistons are movably disposed in a pair of buffer chambers, and the pair of pistons are slidably connected to a pair of guide rods. The radial cross-sectional shape of the pistons matches that of the buffer chambers. A pair of return springs are respectively disposed in the pair of buffer chambers, and a pair of pistons are located between the pair of return springs. One end of each return spring is connected to the piston, and the other end of each return spring is connected to the inner wall of the can body, for elastic support of the piston. A pair of air inlet pipes are provided on the tank body. The output ends of the pair of air inlet pipes are respectively connected to the pair of buffer chambers. The output ends of the pair of air inlet pipes are located between the pair of pistons. The input ends of the pair of air inlet pipes are respectively connected to the pair of air supply components. A pair of second electrically controlled valves are disposed on the tank body, the input ends of the pair of second electrically controlled valves are respectively connected to the pair of buffer chambers, and the input ends of the pair of second electrically controlled valves are located between the pair of pistons; A pair of exhaust pipes are provided on the tank body. The input ends of the pair of exhaust pipes are respectively connected to the pair of buffer chambers. The input ends of the exhaust pipes are located between the pair of pistons. The output ends of the exhaust pipes are connected to the first airbag and are used to supply air to the first airbag. A pair of third electrically controlled valves are respectively installed on the pair of exhaust pipes to control the opening and closing of the exhaust pipes; A pair of guide tubes are disposed on the tank body, the head ends of the pair of guide tubes are respectively connected to the pair of buffer chambers, and the pair of pistons are located between the head ends of the pair of guide tubes; A pair of spray pipes are fixedly installed on the inner shell. The main sections of the pair of spray pipes are respectively connected to the pair of guide pipes. Several branch sections of any one of the spray pipes are attached to the circumferential sidewall of the inner shell. Several water outlets are opened on each branch section of the spray pipe, and any one of the water outlets faces the circumferential sidewall of the inner shell. A pair of third check valves are respectively installed on the main sections of the pair of spray pipes to restrict the flow direction of liquid or gas through the branch sections of the spray pipes; A pair of water-drawing pipes are fixedly installed on the inner wall of the outer shell. The water-drawing pipes are located at the bottom of the inner cavity of the outer shell. The output ends of the pair of water-drawing pipes are respectively connected to the pair of guide pipes for drawing out the aqueous solution stored in the cavity between the outer shell and the inner shell. A pair of fourth check valves are respectively installed on the pair of pumping pipes to restrict the flow direction of liquid or gas flowing through the pumping pipes.

9. A servo motor with good waterproof performance as described in claim 7, characterized in that, The power assembly includes: A pair of sliding grooves are formed on the second assembly bracket, and the pair of sliding grooves are arranged in parallel. A pair of racks are movably mounted on the second assembly bracket, and the pair of racks are slidably connected to the pair of sliding grooves respectively; A pair of connectors are respectively fixedly mounted on the pair of racks, and the pair of connectors are respectively connected to the pair of air supply components to drive the pair of air supply components to operate; An assembly shaft is disposed in the inner cavity of the tail end housing. One end of the assembly shaft is rotatably connected to the second assembly bracket, and the other end of the assembly shaft is rotatably connected to the inner wall of the tail end housing. A gear is fixedly sleeved on the assembly shaft. The gear meshes with the pair of racks and drives the pair of racks to slide back and forth along the guide of the pair of sliding grooves. A swinging component is movably disposed in the inner cavity of the tail end housing. The top end of the swinging component is fixedly connected to the assembly shaft and is used to drive the assembly shaft to rotate.

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