CN115864715B - Durable motor for electric tool with long service life - Google Patents
Durable motor for electric tool with long service life Download PDFInfo
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- CN115864715B CN115864715B CN202211568476.6A CN202211568476A CN115864715B CN 115864715 B CN115864715 B CN 115864715B CN 202211568476 A CN202211568476 A CN 202211568476A CN 115864715 B CN115864715 B CN 115864715B
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Abstract
The application discloses a long-life durable motor for an electric tool, which comprises a protective shell and a motor body positioned in the protective shell, wherein the motor body comprises a rotating shaft, a stator, a rotor, a shell and two end covers, the two end covers are provided with mounting bearings which are mounted at the rotating shaft, and the shell and the two end covers are provided with heat dissipation through holes; a driving gear is fixed at the rotating shaft; the protective housing includes U-shaped fixed plate, with U-shaped fixed plate fixed connection's U-shaped connecting plate, with U-shaped connecting plate fixed connection's housing portion and two bar connecting plates, every bar connecting plate and U-shaped fixed plate, U-shaped connecting plate and housing portion all fixed connection, motor body pass through the linking bridge with housing portion fixed connection. The motor is waterproof and dustproof and has long service life.
Description
Technical Field
The application relates to the field of motors, in particular to a motor for an electric tool with long service life and durability.
Background
The electric tool is generally based on electric equipment for operation driven by a motor, such as an electric drill and the like, is very common in some decoration occasions, and is often not very large, many electric tools can be operated by one hand or two hands, and in the use process, the electric tools are often frequently switched back and forth between use and non-use states, such as the electric drill is often switched back and forth in the operation of drilling, so that the motor needs to be switched back and forth between starting and stopping, the motor in the electric tools is often not provided with an independent shell for heat dissipation, the protection effect on the motor is poor, in addition, the shell of the electric tools is provided with a plurality of heat dissipation holes for heat dissipation, so that dust, wood dust, water and the like enter the heat dissipation holes, and damage to the electric tools is caused, and in particular the electric tools are often used in occasions with more dust, wood dust and water, so that the service life of the electric tools is very unfavorable for prolonging.
Disclosure of Invention
The application aims to: the application aims to overcome the defects of the prior art and provide a motor for an electric tool with long service life and durability.
The technical scheme is as follows: the motor comprises a protective shell and a motor body positioned in the protective shell, wherein the motor body comprises a rotating shaft, a stator, a rotor, a machine shell and two end covers, mounting bearings mounted at the rotating shaft are arranged at the two end covers, and the machine shell and the two end covers are respectively provided with a heat dissipation through hole; a driving gear is fixed at the rotating shaft; the protective housing includes U-shaped fixed plate, with U-shaped fixed plate fixed connection's U-shaped connecting plate, with U-shaped connecting plate fixed connection's housing portion and two bar connecting plates, every bar connecting plate and U-shaped fixed plate, U-shaped connecting plate and housing portion all fixed connection, motor body pass through the linking bridge with housing portion fixed connection.
Further, the housing part comprises a U-shaped end plate fixedly connected with the U-shaped connecting plate, a housing main body fixedly connected with the U-shaped end plate and a rear cover plate fixedly connected with the housing main body, wherein the rear cover plate is provided with a plurality of air inlet grooves, the U-shaped connecting plate comprises two plane plates and a cambered surface plate connected with the two plane plates, and the plane plates and the cambered surface plate are respectively provided with an air outlet groove.
Thereby the air inlet groove and the air outlet groove can help to realize better heat dissipation.
Further, the movable sealing unit and the rear cover sealing unit are also included, the plurality of air inlet grooves are arc-shaped through grooves and are distributed in an annular equidistant manner, a first connecting block is formed between two adjacent arc-shaped through grooves, and a limiting through hole is formed at the first connecting block; the U-shaped fixing plate is provided with a plurality of mounting blind holes, the movable sealing unit comprises a U-shaped movable plate, an arc-shaped rod fixedly connected with the U-shaped movable plate, a sliding plate fixedly connected with the U-shaped movable plate, a circular rotating plate and a rotating ring fixed at the rotating plate, the rotating ring is provided with a rotating shaft perforation and a plurality of limit grooves communicated with the rotating shaft perforation, the rotating shaft penetrates through the rotating shaft perforation, the rotating shaft is provided with a plurality of limit ribs matched with the limit grooves, the sliding plate and the rotating plate are connected through a first bearing, the U-shaped movable plate comprises two planar movable plates and an arc-shaped movable plate connected with the two planar movable plates, the arc-shaped movable plate is fixedly connected with the sliding plate through second connecting blocks, each second connecting block is fixedly connected with one sliding rod, the sliding rod and the first connecting blocks are equal in number and correspond to each other, each sliding rod penetrates through one limit through hole, the U-shaped movable plate is fixedly provided with a plurality of protruding blocks, the U-shaped movable plate is fixedly connected with one end of the U-shaped movable plate and the U-shaped movable plate is provided with one compression blind hole, and the U-shaped movable plate is fixedly connected with one compression lug; the rear cover plate is provided with a spring mounting groove, the rear cover sealing unit comprises a sealing cover plate and a tension spring connected with the sealing cover plate, and the tension spring is mounted at the spring mounting groove; the rotating shaft is fixedly provided with a rotating block, the rotating block is provided with a plurality of driving units, each driving unit comprises a limiting abutting block fixedly connected with the rotating block, a driving block hinged with the rotating block through an elastic reset hinging component and a balancing weight fixedly connected with the driving block, and each driving block is provided with a first abutting surface; the rotating block is connected with a rotating wheel through a second bearing, a plurality of fan rotating blades are fixed at the rotating wheel, a plurality of limiting rods are mounted at the rotating wheel through elastic reset hinge components, abutting balls are fixed at the end parts of the limiting rods, and the rotating wheel is further provided with a frustum-shaped second abutting surface which can be abutted by the driving block.
Further, the driving units are multiple and distributed in annular equidistant mode, the limiting rods are multiple and distributed in annular equidistant mode, and the number of the driving units is equal to the number of the limiting rods.
Further, the motor can be in a non-use state and a use state, in the non-use state, the rotating shaft is static, the sealing cover plate seals all air inlet grooves, each balancing weight is abutted against a corresponding limiting abutting block, each abutting sphere is abutted against the sliding plate, and the U-shaped movable plate is abutted against the U-shaped fixed plate and seals all air outlet grooves; in the state of use, the pivot is in rotation state, and the first butt face of every drive piece all butt the second butt face, every butt spheroid all do not butt the sliding plate, every fixed lug all butt U-shaped tip board, the tip of every sliding rod all butt the back lid, all air inlet grooves and all air-out grooves all open.
Further, the U-shaped end plate is fixed with a first limiting block and two second limiting blocks in the housing main body, the first limiting block is provided with an arc slot communicated with the U-shaped slot, the second limiting block is provided with a plane slot communicated with the U-shaped slot, the arc movable plate can slide in the arc slot, and the plane movable plate can slide in the plane slot.
Further, the arc slot and the end, far away from the U-shaped connecting plate, of the plane slot are closed ends, and in the use state, the U-shaped movable plate abuts against the closed ends of the arc slot and the plane slot.
Further, the number of the driving units is 3-6.
Further, the number of the fixing lugs and the number of the compression springs are 4.
Further, the number of the limit grooves and the limit ribs are equal and correspond to each other one by one, and the number of the limit grooves is 3-8 and distributed in an annular equidistant mode.
Further, the number of the second connecting blocks is three, one second connecting block is arranged between the cambered surface movable plate and the sliding plate, and two second connecting blocks are arranged between the cambered rod and the sliding plate; the first limiting block is provided with a connecting through groove which is communicated with the arc-shaped slot and used for accommodating the second connecting block.
Further, the first abutting surface is in a curved surface shape matched with the second abutting surface, and a friction coating is arranged at the first abutting surface.
So that the driving block can better drive the rotation of the rotating wheel when the driving block abuts against the rotating wheel.
Further, the number of the connecting frames is two, and ventilation grooves are formed in the connecting frames.
Thereby facilitating the passage of the heat dissipation air flow.
Further, the housing body has a plurality of reinforcing ribs therein.
Further, the U-shaped fixing plate and the rear cover plate are provided with a plurality of mounting counter bores.
Further, the strip-shaped connecting plate is provided with a strip-shaped sliding rail groove.
The beneficial effects are that: compared with a common motor for an electric tool, the motor has better protection for the motor, and is concretely as follows:
1) According to the motor for the electric tool, the independent shell is arranged, and the heat dissipation through holes in the shell can be provided with a large number and a large area, so that on one hand, the integrity of the motor is maintained, the motor is protected rigidly, and the heat dissipation effect is guaranteed.
2) The electric tool realizes modularized installation, and the motor unit can be conveniently detached from the electric tool, so that the maintenance of the motor, such as ash removal, is more convenient.
3) The air inlet groove and the air outlet groove of the protective shell of the motor of the electric tool can be closed when the electric tool is not used, and can be opened when the electric tool is used, and heat can be continuously dissipated for a period of time after the electric tool is closed, so that the motor can achieve better heat dissipation.
Drawings
FIG. 1 is a schematic view of a motor in a non-use state;
FIG. 2 is a schematic view of another view angle motor in a non-use state;
FIG. 3 is a schematic diagram illustrating a process of switching from a non-use state to a use state;
FIG. 4 is a schematic view of another view of the transition from the non-use state to the use state;
FIG. 5 is a schematic view of the motor in use;
FIG. 6 is a schematic diagram illustrating the process from the active state to the inactive state;
FIG. 7 is a schematic diagram of the component disassembly;
FIG. 8 is an enlarged view of area A;
fig. 9 is a schematic view of another view with parts broken away.
Detailed Description
Reference numerals: 1.1U-shaped fixing plates; a mounting counterbore at the 1.1.1U-shaped retainer plate; 1.2 cover shell; 1.2.1 reinforcing ribs; 1.2.2 back cover plates; 1.2.3 air inlet grooves; 1.2.4 first connection blocks; 1.2.5 limit through holes; 1.2.6 mounting counter bores at the back cover plate; 1.2.7 spring mounting slots; 1.2.8U shaped end plates; 1.2.9 second limiting blocks; 1.2.10 first limiting blocks; 1.2.11 connecting through slots; 1.2.12U shaped slots; 1.3U-shaped connection plates; 1.3.1 air outlet grooves; 1.4 strip-shaped connecting plates; 1.4.1 bar-shaped slide rail grooves; 2U-shaped movable plate; 2.1.1 cambered surface movable plates; 2.1.2 plane movable plate; 2.1.3 compression springs; 2.2 sliding plates; 2.2.1 second connection block; 2.2.2 first bearings; 2.2.3 rotating plates; 2.2.4 rotating ring; 2.2.5 shaft perforations; 2.2.6 limit grooves; 2.2.7 arc bars; 2.3 sliding bar; 4.1 connecting the brackets; 4.2 end caps; 4.3 a casing; 4.4 rotating shaft; 4.5 limiting convex ribs; 4.6 rotating blocks; 4.7 limiting abutting blocks; 4.8 driving blocks; 4.8.1 a first abutment surface; 4.9 balancing weight; 4.10 limiting rods; 4.10.1 the ball; 4.11 second bearings; 4.12 rotating wheels; 4.12.1 second abutment surface; 4.12.2 fan rotor blades; 4.13 drive gears; 5.1 closing the cover plate; 5.2 tension spring.
As shown in the figure: the motor for the long-life durable electric tool comprises a protective shell and a motor body positioned in the protective shell, wherein the motor body comprises a rotating shaft 4.4, a stator, a rotor, a machine shell 4.3 and two end covers 4.2, mounting bearings mounted at the rotating shaft 4.4 are arranged at the two end covers 4.2, and the machine shell 4.3 and the two end covers 4.2 are respectively provided with a heat dissipation through hole; a driving gear 4.13 is fixed at the rotating shaft 4.4; the protective housing includes U-shaped fixed plate 1.1, with U-shaped fixed plate 1.1 fixed connection's U-shaped connecting plate 1.3, with U-shaped connecting plate 1.3 fixed connection's cover shell portion 1.2 and two bar connecting plates 1.4, every bar connecting plate 1.4 and U-shaped fixed plate 1.1, U-shaped connecting plate 1.3 and the equal fixed connection of cover shell portion 1.2, the motor body pass through linking bridge 4.1 with cover shell portion 1.2 fixed connection. The housing part 1.2 comprises a U-shaped end plate 1.2.8 fixedly connected with a U-shaped connecting plate 1.3, a housing main body fixedly connected with the U-shaped end plate 1.2.8 and a rear cover plate 1.2.2 fixedly connected with the housing main body, wherein the rear cover plate 1.2.2 is provided with a plurality of air inlet grooves 1.2.3, the U-shaped connecting plate 1.3 comprises two plane plates and a cambered surface plate connected with the two plane plates, and the plane plates and the cambered surface plate are respectively provided with an air outlet groove 1.3.1.
In addition, the motor also comprises a movable sealing unit and a rear cover sealing unit, the air inlet grooves 1.2.3 are arc-shaped through grooves and are distributed in an annular equidistant manner, a first connecting block 1.2.4 is formed between two adjacent arc-shaped through grooves, and a limiting through hole 1.2.5 is formed in the first connecting block 1.2.4; the U-shaped fixed plate 1.1 is provided with a plurality of mounting blind holes, the movable closing unit comprises a U-shaped movable plate 2, an arc-shaped rod 2.2.7 fixedly connected with the U-shaped movable plate 2, a sliding plate 2.2 fixedly connected with the U-shaped movable plate 2, a circular rotating plate 2.2.3 and a rotating ring 2.2.4 fixed at the position of the rotating plate 2.2.3, the rotating ring 2.2.4 is provided with a rotating shaft through hole 2.2.5 and a plurality of limiting grooves 2.2.6 communicated with the rotating shaft through hole 2.2.5, the rotating shaft 4.4 penetrates through the rotating shaft through hole 2.2.5, the rotating shaft 4.4 is provided with a plurality of limiting ribs 4.5 matched with the limiting grooves 2.2.6, the sliding plate 2.2 and the rotating plate 2.3 are connected through a first bearing 2.2.2, the U-shaped movable plate 2 comprises two plane movable plates 2.1.2 and a cambered surface-shaped movable plate 1.1.2 connected with the two plane movable plates 2.2, the arc-shaped movable plates 2.1.1 and the sliding plates 2.2 and the arc-shaped rods 2.2.7 and the sliding plates 2.2 are fixedly connected through second connecting blocks 2.2.1, each second connecting block 2.2.1 is fixedly connected with one sliding rod 2.3, the sliding rods 2.3 and the first connecting blocks 1.2.4 are equal in number and are in one-to-one correspondence, each sliding rod 2.3 penetrates through one limiting through hole 1.2.5, a plurality of fixing convex blocks are fixed at the U-shaped movable plate 2, the fixing convex blocks and the mounting blind holes are equal in number and are in one-to-one correspondence, a compression spring 2.1.3 is connected between each fixing convex block and each blind end of each mounting blind hole, and a U-shaped slot 1.2.12 penetrated by the U-shaped movable plate 2 is arranged at the U-shaped end plate 1.2.8; the rear cover plate 1.2.2 is provided with a spring mounting groove 1.2.7, the rear cover sealing unit comprises a sealing cover plate 5.1 and a tension spring 5.2 connected with the sealing cover plate 5.1, and the tension spring 5.2 is mounted at the spring mounting groove 1.2.7; a rotating block 4.6 is fixed at the rotating shaft 4.4, a plurality of driving units are installed at the rotating block 4.6, each driving unit comprises a limiting abutting block 4.7 fixedly connected with the rotating block 4.6, a driving block hinged with the rotating block 4.6 through an elastic reset hinging component and a balancing weight 4.9 fixedly connected with the driving block, and each driving block 4.8 is provided with a first abutting surface 4.8.1; the rotating block 4.6 is connected with a rotating wheel 4.12 through a second bearing 4.11, a plurality of fan rotating blades 4.12.2 are fixed at the rotating wheel 4.12, a plurality of limiting rods 4.10 are mounted at the rotating wheel 4.12 through elastic reset hinge components, abutting balls 4.10.1 are fixed at the end parts of the limiting rods 4.10, and the rotating wheel 4.12 is further provided with a frustum-shaped second abutting surface 4.12.1 which can be abutted by the driving block. The driving units are distributed in an annular equidistant mode, the limiting rods 4.10 are distributed in an annular equidistant mode, and the driving units are equal to the limiting rods 4.10 in number; the motor for the electric tool can be in a non-use state and a use state, in the non-use state, the rotating shaft 4.4 is static, the sealing cover plate 5.1 seals all air inlet grooves 1.2.3, each balancing weight 4.8 is abutted against the corresponding limiting abutting block 4.7, each abutting ball 4.10.1 is abutted against the sliding plate 2.2, and the U-shaped movable plate 2 is abutted against the U-shaped fixed plate 1.1 and seals all air outlet grooves 1.3.1; in the use state, the rotational speed of pivot 4.4 is greater than the rotational speed threshold value, and the first butt face 4.8.1 of every drive piece 4.8 all butt second butt face 4.12.1, every butt ball 4.10.1 all do not butt sliding plate 2.2, every fixed lug all butt U-shaped tip board 1.2.8, the tip of every sliding rod 2.3 all butt back lid 5.1, all air inlet groove 1.2.3 and all air-out groove 1.3.1 all open.
The U-shaped end plate 1.2.8 is fixedly provided with a first limiting block 1.2.10 and two second limiting blocks 1.2.9 which are arranged in the housing main body, the first limiting block 1.2.10 is provided with an arc-shaped slot communicated with the U-shaped slot 1.2.12, the second limiting block 1.2.9 is provided with a plane slot communicated with the U-shaped slot 1.2.12, the arc-shaped movable plate 2.1.1 can slide in the arc-shaped slot, and the plane movable plate 2.1.2 can slide in the plane slot. The arc slot and the flat slot are closed ends at one end far away from the U-shaped connecting plate 1.3, and in the use state, the U-shaped movable plate 2 is abutted against the closed ends of the arc slot and the flat slot. The number of the driving units is 3-6; the number of the fixing lugs and the number of the compression springs 2.1.3 are 4; the number of the limiting grooves 2.2.6 is equal to that of the limiting ribs 4.5, the limiting grooves 2.2.6 are in one-to-one correspondence with the limiting ribs, and the limiting grooves 2.2.6 are 3-8 and distributed in an annular equidistant mode. The number of the second connecting blocks 2.2.1 is three, one second connecting block 2.2.1 is arranged between the cambered surface movable plate 2.1.1 and the sliding plate 2.2, and two second connecting blocks 2.2.1 are arranged between the cambered surface rod 2.2.7 and the sliding plate 2.2; the first limiting block 1.2.4 is provided with a connecting through groove 1.2.11 which is communicated with the arc-shaped slot and used for accommodating the second connecting block 2.2.1. The first abutting surface 4.8.1 is in a curved surface shape matched with the second abutting surface 4.12.1, and a friction coating is arranged at the first abutting surface 4.8.1. The housing body is provided with a plurality of reinforcing ribs 1.2.1; the U-shaped fixing plate 1.1 and the rear cover plate 1.2.2 are provided with a plurality of mounting counter bores; the strip-shaped connecting plate 1.4 is provided with a strip-shaped sliding rail groove 1.4.1.
As shown in the figure, the motor for a power tool of the present application has a gear at a motor shaft that can be engaged with a gear set of the power tool for driving rotation of a member such as a drill bit. And the motor and part of the housing of the electric tool (i.e. the protective housing of the application) are integrated together so that the protective housing achieves a special protection for the motor. In addition, the motor body is provided with the shell and the two end covers, and the shell and the end covers mainly protect the motor from impact (such as impact caused by falling and collision) without being used for dust prevention and water prevention, so that more large-area heat dissipation through holes can be formed, and the motor body is more convenient to install and replace due to the independent shell and the end covers. In addition, the protective shell and the shell of the electric tool can be matched in a sliding groove and sliding rail mode during fixed installation, and are fixed through bolts, so that the electric tool is simple to fix and stable in fixing.
The specific heat dissipation process of the application is as follows: under the condition of stopping, as shown in fig. 1 and 2, at this time, because the rotating shaft does not rotate, under the action of the tension spring and under the action of the elastic force of the elastic reset hinge component at the position of the limiting rod, the U-shaped movable plate is abutted against the U-shaped fixed plate, so that all air outlet grooves are sealed, and all air inlet grooves are sealed by the sealing cover plate, so that the motor is comprehensively protected. When an operator uses the electric tool, the motor shaft rotates, so that firstly, when the rotation speed reaches a certain rotation speed, the whole formed by the driving block and the balancing weight moves towards the direction of the second abutting surface under the action of centrifugal force, and the rotation speed is larger, the first abutting surface and the second abutting surface are abutted tightly, so that the rotating wheel and the rotating block can be driven to synchronously rotate, when the rotation speed of the rotating wheel reaches a certain rotation speed, the limiting rod and the abutting sphere are enabled to be far away from the sliding plate under the action of the centrifugal force, the sliding plate moves towards the direction of the motor body under the action of a plurality of compression springs until all fixing convex blocks abut against the U-shaped end plate, so that the air outlet groove is exposed, the sliding rod abuts against the sealing cover plate, so that the air inlet groove is exposed, and therefore, the opening of the air inlet groove and the air outlet groove is realized, and at the moment, the fan rotating blade rotates, circulation of heat dissipation air flow is realized. In addition, when the motor is powered off, the motor shaft stops rotating soon after a short period of time due to inertial rotation, and even some electric tools can be provided with a program or an additional braking mechanism due to operation requirements, so that the motor shaft can stop rotating as soon as possible after receiving a stop instruction, and in this case, if the heat dissipation air flow is stopped along with the motor shaft, the heat dissipation of the motor is disadvantageous, because at the moment, residual heat is not dissipated, and if the heat dissipation is stopped immediately, the durable use of the motor is disadvantageous. Therefore, after the motor receives the stop command, the speed of the motor shaft gradually becomes smaller until the motor stops rotating, but because the rotating wheel and the rotating block are connected through the second bearing, even though the rotating shaft stops running, the rotating wheel continuously rotates for a period of time under the action of inertia, in the period of time, the limiting rod gradually moves towards the sliding plate along with the gradual decrease of the rotating speed (the limiting rod is actually acted by the elastic force of the elastic reset hinging part and the radial centrifugal force at the same time, and the centrifugal force is gradually decreased), the sliding plate is acted by the elastic force of the compression spring, the elastic force of the extension spring and the thrust of the abutting sphere at the same time, and the thrust of the abutting sphere is gradually increased, so that when the rotating wheel is sufficiently small and even stopped, the rotating wheel is closed again, but the air inlet grooves and the air outlet grooves are continuously cooled for a period of time after the motor stops, the residual heat is taken away by the cooling air flow, and the cooling effect is better, and the motor can be ensured to be used more durably.
While the application has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the scope of the application as defined in the following claims.
Claims (7)
1. The motor for the long-life durable electric tool is characterized by comprising a protective shell, a motor body, a movable sealing unit and a rear cover sealing unit, wherein the motor body is positioned in the protective shell and comprises a rotating shaft, a stator, a rotor, a machine shell and two end covers, mounting bearings are arranged at the rotating shaft, and heat dissipation through holes are formed in the machine shell and the two end covers; a driving gear is fixed at the rotating shaft; the protective shell comprises a U-shaped fixing plate, a U-shaped connecting plate fixedly connected with the U-shaped fixing plate, a housing part fixedly connected with the U-shaped connecting plate and two strip-shaped connecting plates, each strip-shaped connecting plate is fixedly connected with the U-shaped fixing plate, the U-shaped connecting plate and the housing part, and the motor body is fixedly connected with the housing part through a connecting bracket; the cover shell part comprises a U-shaped end plate fixedly connected with the U-shaped connecting plate, a cover shell main body fixedly connected with the U-shaped end plate and a rear cover plate fixedly connected with the cover shell main body, the rear cover plate is provided with a plurality of air inlet grooves, the U-shaped connecting plate comprises two plane plates and a cambered surface plate connected with the two plane plates, and the plane plates and the cambered surface plate are provided with air outlet grooves; the air inlet grooves are arc-shaped through grooves and are distributed in an annular equidistant manner, a first connecting block is formed between two adjacent arc-shaped through grooves, and a limiting through hole is formed in the first connecting block; the U-shaped fixing plate is provided with a plurality of mounting blind holes, the movable sealing unit comprises a U-shaped movable plate, an arc-shaped rod fixedly connected with the U-shaped movable plate, a sliding plate fixedly connected with the U-shaped movable plate, a circular rotating plate and a rotating ring fixed at the rotating plate, the rotating ring is provided with a rotating shaft perforation and a plurality of limit grooves communicated with the rotating shaft perforation, the rotating shaft penetrates through the rotating shaft perforation, the rotating shaft is provided with a plurality of limit ribs matched with the limit grooves, the sliding plate and the rotating plate are connected through a first bearing, the U-shaped movable plate comprises two planar movable plates and an arc-shaped movable plate connected with the two planar movable plates, the arc-shaped movable plate is fixedly connected with the sliding plate through second connecting blocks, each second connecting block is fixedly connected with one sliding rod, the sliding rod and the first connecting blocks are equal in number and correspond to each other, each sliding rod penetrates through one limit through hole, the U-shaped movable plate is fixedly provided with a plurality of protruding blocks, the U-shaped movable plate is fixedly connected with one end of the U-shaped movable plate and the U-shaped movable plate is provided with one compression blind hole, and the U-shaped movable plate is fixedly connected with one compression lug; the rear cover plate is provided with a spring mounting groove, the rear cover sealing unit comprises a sealing cover plate and a tension spring connected with the sealing cover plate, and the tension spring is mounted at the spring mounting groove; the rotating shaft is fixedly provided with a rotating block, the rotating block is provided with a plurality of driving units, each driving unit comprises a limiting abutting block fixedly connected with the rotating block, a driving block hinged with the rotating block through an elastic reset hinging component and a balancing weight fixedly connected with the driving block, and each driving block is provided with a first abutting surface; the rotating block is connected with a rotating wheel through a second bearing, a plurality of fan rotating blades are fixed at the rotating wheel, a plurality of limiting rods are mounted at the rotating wheel through elastic reset hinging components, abutting spheres are fixed at the end parts of the limiting rods, and the rotating wheel is also provided with a frustum-shaped second abutting surface which can be abutted by the driving block; the driving units are distributed in an annular equidistant mode, the limiting rods are distributed in an annular equidistant mode, and the driving units are equal to the limiting rods in number; the motor for the electric tool can be in a non-use state and a use state, in the non-use state, the rotating shaft is static, the sealing cover plate seals all air inlet grooves, each balancing weight is abutted against a corresponding limiting abutting block, each abutting sphere is abutted against the sliding plate, and the U-shaped movable plate is abutted against the U-shaped fixed plate and seals all air outlet grooves; in the use state, the rotational speed of pivot is greater than rotational speed threshold value, the first butt face of every drive piece all butt the second butt face, every butt spheroid all do not butt the sliding plate, every fixed lug all butt U-shaped tip board, the tip of every sliding rod all butt the back lid, all air inlet grooves and all air-out grooves all open.
2. The long life durable electric machine for electric tools according to claim 1, wherein the U-shaped end plate is fixed with a first stopper and two second stoppers inside the housing main body, the first stopper has an arc slot communicating with the U-shaped slot, the second stopper has a planar slot communicating with the U-shaped slot, the arc movable plate is slidable inside the arc slot, and the planar movable plate is slidable inside the planar slot.
3. The long-life durable electric machine for electric tools according to claim 2, wherein the ends of the arc-shaped slot and the planar slot which are far from the U-shaped connection plate are closed ends, and in the use state, the U-shaped movable plate abuts against the closed ends of the arc-shaped slot and the planar slot.
4. The long-life durable electric machine for electric tools according to claim 1, wherein the number of the driving units is 3 to 6; the number of the fixing convex blocks and the number of the compression springs are 4; the number of the limiting grooves is 3-8, and the limiting grooves are distributed in an annular equidistant mode.
5. The long life durable electric machine for electric tools according to claim 2, wherein said second connection blocks are three, one of said second connection blocks is provided between said arc movable plate and said slide plate, and two of said second connection blocks are provided between said arc rod and said slide plate; the first limiting block is provided with a connecting through groove which is communicated with the arc-shaped slot and used for accommodating the second connecting block.
6. The long life durable electric machine for electric tools according to claim 2, wherein the first contact surface is curved to match the second contact surface, and the first contact surface has a friction coating.
7. The long-life durable electric motor for electric tools according to claim 2, wherein the housing main body has a plurality of reinforcing ribs; the U-shaped fixing plate and the rear cover plate are provided with a plurality of mounting counter bores; the strip-shaped connecting plate is provided with a strip-shaped sliding rail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211568476.6A CN115864715B (en) | 2022-12-08 | 2022-12-08 | Durable motor for electric tool with long service life |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211568476.6A CN115864715B (en) | 2022-12-08 | 2022-12-08 | Durable motor for electric tool with long service life |
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| CN115864715A CN115864715A (en) | 2023-03-28 |
| CN115864715B true CN115864715B (en) | 2023-09-12 |
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| CN202211568476.6A Active CN115864715B (en) | 2022-12-08 | 2022-12-08 | Durable motor for electric tool with long service life |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7439820B2 (en) * | 2019-03-06 | 2024-02-28 | ニデック株式会社 | motor unit |
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| CN115864715A (en) | 2023-03-28 |
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