CN218895252U

CN218895252U - Self-lubricating electric actuator

Info

Publication number: CN218895252U
Application number: CN202223456337.2U
Authority: CN
Inventors: 周志鹏; 张贝妮; 陈武
Original assignee: Once Top Motor Manufacture Co ltd
Current assignee: Once Top Motor Manufacture Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-04-21
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses a self-lubricating electric actuator, which comprises a shell, a motor and a screw rod mechanism, wherein the motor is installed in the shell, the screw rod mechanism comprises a screw rod and a transmission nut, a first end of the screw rod is connected with an output shaft of the motor, a threaded hole for installing the screw rod is formed in one end, close to the motor, of the transmission nut, a second end of the screw rod is installed in the threaded hole, lubricating grease is arranged on the screw rod, an oil filling hole is formed in one end, far away from the motor, of the transmission nut, the oil filling hole is communicated with the threaded hole, an oil storage boss is arranged at one end, close to the motor, of the transmission nut, the oil storage boss is in sliding connection with the inner wall of the shell, an oil storage groove is formed in the oil storage boss, and the lubricating grease is arranged in the oil storage groove. The lubricating grease is arranged between the transmission nut and the shell, and is used for lubricating, reducing abrasion and prolonging the service life of the utility model.

Description

Self-lubricating electric actuator

Technical Field

The utility model belongs to the field of electric actuators, and particularly relates to a self-lubricating electric actuator.

Background

Actuators are an essential component of an automatic control system, and can be classified into pneumatic actuators, hydraulic actuators, and electric actuators according to the driving modes thereof. The pneumatic actuator and the hydraulic actuator are generally used in heavy industry due to larger output thrust, but the pneumatic actuator and the hydraulic actuator have large requirements on the field, generate noise in the running process and have low precision.

Due to social development, mechanized and intelligent replacement of heavy and repeated labor of human beings is an integral social trend, and the electric actuator has fast development in various industries due to the advantages of convenient energy source taking, rapid signal transmission, no great demand on places, low noise and the like, and the electric actuator on the market at present is driven by a screw mechanism, but larger friction exists between a screw and a transmission nut and between the outer side of the transmission nut and a guide structure, so that the noise is larger, and the accuracy is reduced due to abrasion after the service time is long.

Disclosure of Invention

Aiming at the defects or improvement demands of the prior art, the utility model provides a self-lubricating electric actuator, which has good lubricating effect by arranging lubricating grease between a screw rod and a transmission nut as well as between the transmission nut and a machine shell, and can prolong the service life.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a self-lubricating electric actuator, comprising a housing, a motor and a screw mechanism, the motor being mounted in the housing, wherein:

the screw red mechanism comprises a screw and a transmission nut, the first end of the screw is connected with an output shaft of the motor, one end of the transmission nut, which is close to the motor, is provided with a threaded hole for installing the screw, the second end of the screw is installed in the threaded hole, lubricating grease is arranged on the screw, one end of the transmission nut, which is far away from the motor, is provided with an oil filling hole, the oil filling hole is communicated with the threaded hole, one end of the transmission nut, which is close to the motor, is provided with an oil storage boss, the oil storage boss is in sliding connection with the inner wall of the shell, and an oil storage groove is formed in the oil storage boss, and lubricating grease is arranged in the oil storage groove.

Preferably, the casing includes the shell and sets up motor mount table and the direction inner shell in the shell, motor mount table have with the through-hole of direction inner shell's inner chamber intercommunication to the output shaft of motor and the lead screw connection in the direction inner shell, the motor be close to the terminal surface of lead screw with motor mount table looks butt and motor fixed mounting is in on the motor mount table, the oil storage boss on the drive nut with the inner wall sliding connection of direction inner shell.

Preferably, one end of the screw rod, which is close to the motor, is provided with an annular baffle table, an oil baffle ring is sleeved on the annular baffle table, and the oil baffle ring is contacted with the inner wall of the guide inner shell and the hole wall of the through hole so as to block a gap between the motor and the motor mounting table.

Preferably, the oil baffle ring is made of rubber material.

Preferably, the casing includes the shell and sets up the end cover on the shell, be provided with the through-hole on the end cover, the one end that the motor was kept away from to the drive nut passes the through-hole after expose in the casing, the inboard fixed mounting of end cover have with the coaxial gasket of through-hole, the internal diameter of gasket is less than the internal diameter of through-hole, the gasket with drive nut clearance fit is used for restricting drive nut's radial rocking.

Preferably, an oil leakage hole is formed in one end, away from the screw rod, of the casing.

Preferably, the end of the drive nut remote from the motor extends out of the housing and this end is provided with threads for connection to an external terminal.

Preferably, a blocking cover is arranged at the oil filling hole.

Preferably, a first limiting table and a second limiting table are arranged on the inner wall of the shell, and the moving stroke of the transmission nut along the first direction and the moving stroke of the transmission nut along the second direction opposite to the first direction are limited respectively.

Preferably, the minor diameter of the threaded hole is larger than the aperture of the oil filling hole, so that the threaded hole and the oil filling hole form a stepped hole.

In general, the above technical solutions conceived by the present utility model, compared with the prior art, enable the following beneficial effects to be obtained:

1) The lubricating grease is arranged between the transmission nut and the shell and between the transmission nut and the screw rod, and is used for lubrication to reduce abrasion, so that the service life of the utility model can be prolonged.

2) After the oil filling hole is filled with lubricating grease, the lubricating grease in the oil filling hole can flow into the threaded hole to lubricate the screw rod and the transmission nut along with the extension of the service time.

3) The screw rod is provided with annular fender platform in the one side that is close to the motor, can block the lubricating grease on the screw rod, avoids lubricating grease drip to advance the motor. In addition, an oil baffle ring is designed between the motor and the shell to block gaps between the motor and the shell and prevent oil leakage.

4) The utility model provides an electric actuator with a simple structure, which is driven by electricity, clean in energy source and convenient to use.

Drawings

FIG. 1 is a schematic perspective view of the present utility model

Fig. 2 is a schematic view of the internal structure of the utility model with the casing removed.

Fig. 3 is a cross-sectional view of the present utility model.

Fig. 4 is a schematic perspective view of another view of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1 to 4, a self-lubricating electric actuator comprises a housing, a motor and a screw mechanism, wherein the motor is installed in the housing, and the motor comprises:

the wire red mechanism comprises a screw rod 7 and a transmission nut 1, a first end of the screw rod 7 is connected with an output shaft of the motor, a threaded hole for installing the screw rod 7 is formed in one end, close to the motor, of the transmission nut 1, one end, far away from the motor, of the transmission nut 1 extends out of the machine shell, threads 11, preferably external threads, are formed in one end, of the transmission nut 1, and the transmission nut is used for being connected with an external terminal. The second end of the screw rod 7 is arranged in the threaded hole, the rotation of the screw rod 7 can drive the transmission nut 1 to move, and the screw rod 7 is provided with lubricating grease, so that good lubrication effect can be achieved on the transmission of the screw rod 7 and the transmission nut 1, abrasion is reduced, noise is reduced, and the service life of a screw rod mechanism is prolonged. The one end that drive nut 1 kept away from the motor is provided with oil filler point 33, and oil filler point 33 and internal screw thread coaxial setting, oil filler point 33 with the screw hole intercommunication can annotate lubricating grease to screw hole through oil filler point 33 after screw mechanism uses a period, then lubricating grease can flow on the lead screw 7 and continue to play the lubrication effect.

The motor is preferably a gear motor, the gear motor comprises a driving motor 5 and a gear box 52, the gear box 52 is arranged at the front end of the driving motor 5, and the gear box 52 is fixedly arranged in the shell 3 through screws. The output shaft of the reduction gearbox 52 is connected with the screw rod 7.

The oil filling hole 33 is provided with a blocking cover 32, lubricating grease can be filled in the oil filling hole 33, and the blocking cover 32 prevents the lubricating grease from leaking out of the front end of the actuator. The transmission nut 1 is provided with an oil storage boss 34 near one end of the motor, and the transmission nut 1 and the oil storage boss 34 are preferably integrally formed. The oil storage boss 34 is slidably connected with the inner wall of the casing, and an oil storage groove 341 is arranged on the oil storage boss 34, and lubricating grease is arranged in the oil storage groove 341. The lubricating grease in the oil storage groove 341 can also reduce the abrasion of the transmission nut 1 and the inner wall of the machine shell, and prolong the service life of the transmission nut 1.

Further, the casing includes the shell 3 and sets up motor mount 36 and direction inner shell 35 in shell 3, and motor mount 36 is preferably a flat board, motor mount 36 have with the through-hole of direction inner shell 35 inner chamber intercommunication to the output shaft of motor is connected with the lead screw 7 in the direction inner shell 35, the terminal surface that the motor is close to lead screw 7 with motor mount 36 looks butt and motor fixed mounting is in on the motor mount 36, the oil storage boss 34 on the drive nut 1 with the inner wall sliding connection of direction inner shell 35, direction inner shell 35 plays the guide effect, prevents drive nut 1 from rocking. The wire outlet hole 31 is reserved on the side face of the shell 3, so that a power wire is conveniently connected with the motor.

Further, there may be the gap oil leak between the terminal surface that the motor is close to lead screw 7 and motor mount 36, therefore, the one end that the lead screw 7 is close to the motor has annular fender platform 71, annular fender platform 71 has cup jointed the oil retaining ring, the oil retaining ring with the inner wall of direction inner shell 35 with the pore wall of through-hole all contacts to plug up the gap between motor and the motor mount 36, prevent that lubricating grease from spilling out from the gap. The oil retaining ring is preferably made of rubber material, has elasticity and good oil retaining effect.

Further, an end cover 2 is further arranged on the housing 3, a through hole is formed in the end cover 2, one end of the transmission nut 1, far away from the motor, penetrates through the through hole and then is exposed out of the housing, a gasket coaxial with the through hole is fixedly arranged on the inner side of the end cover 2, the inner diameter of the gasket is smaller than that of the through hole, and the gasket is in clearance fit with the transmission nut 1 so as to be used for limiting radial shaking of the transmission nut 1.

Further, an oil drain hole 41 is formed in one end of the casing far away from the screw rod 7, a tail cover 4 is preferably arranged at the end, the oil drain hole 41 is formed in the tail cover 4, and the end cover 2 and the tail cover 4 are fixedly mounted on the shell 3 through screws. Be provided with a plurality of oil leakage holes 41 of reserving on the tail-hood 4, after the executor is long-lived in the life, grease proofing circle 51 is ageing owing to the material, can not prevent lubricating grease, and lubricating grease can follow motor housing 3 or the inside inflow bottom of housing 3, and oil leakage holes 41 can be used for leaking lubricating grease's outflow, prevents that lubricating grease from piling up between control module 6 and tail-hood 4. The tail end of the shell is provided with a control module 6, and the control module 6 is fixedly arranged on the tail cover 4 through screws.

Further, a first limit table and a second limit table are arranged on the inner wall of the casing, and the movement stroke of the transmission nut 1 along the first direction and the movement stroke of the transmission nut 1 along the second direction opposite to the first direction are respectively limited, so that the transmission nut 1 slides in the casing 3. If the gasket 8 is provided, the first limiting table is the gasket 8, and the second limiting table may be provided on the inner wall of the guide inner case 35, integrally formed with the guide inner case 35.

Further, the small diameter of the threaded hole is larger than the aperture of the oil filling hole 33, so that the threaded hole and the oil filling hole 33 form a stepped hole, and the lubricating grease in the oil filling hole 33 can flow into the threaded hole quickly due to the enlarged aperture.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a self-lubricating electric actuator which characterized in that, includes casing, motor and screw mechanism, the motor is installed in the casing, wherein:

the screw mechanism comprises a screw and a transmission nut, the first end of the screw is connected with an output shaft of the motor, one end of the transmission nut, which is close to the motor, is provided with a threaded hole for installing the screw, the second end of the screw is installed in the threaded hole, lubricating grease is arranged on the screw, one end of the transmission nut, which is far away from the motor, is provided with an oil filling hole, the oil filling hole is communicated with the threaded hole, one end of the transmission nut, which is close to the motor, is provided with an oil storage boss, the oil storage boss is in sliding connection with the inner wall of the shell, and an oil storage groove is formed in the oil storage boss, and lubricating grease is arranged in the oil storage groove.

2. The self-lubricating electric actuator of claim 1, wherein the housing comprises an outer shell, a motor mounting table and a guide inner shell, wherein the motor mounting table and the guide inner shell are arranged in the outer shell, the motor mounting table is provided with a through hole communicated with an inner cavity of the guide inner shell so that an output shaft of the motor is connected with a screw rod in the guide inner shell, the end face, close to the screw rod, of the motor is abutted against the motor mounting table, the motor is fixedly arranged on the motor mounting table, and an oil storage boss on the transmission nut is in sliding connection with the inner wall of the guide inner shell.

3. The self-lubricating electric actuator according to claim 2, wherein one end of the screw rod, which is close to the motor, is provided with an annular baffle table, an oil baffle ring is sleeved on the annular baffle table, and the oil baffle ring is contacted with the inner wall of the guide inner shell and the hole wall of the through hole so as to block a gap between the motor and the motor mounting table.

4. A self-lubricating electric actuator as set forth in claim 3 wherein said oil deflector is a rubber material.

5. The self-lubricating electric actuator of claim 1, wherein the housing comprises a housing and an end cover arranged on the housing, a through hole is arranged on the end cover, one end of the transmission nut, which is far away from the motor, passes through the through hole and then is exposed out of the housing, a gasket coaxial with the through hole is fixedly arranged on the inner side of the end cover, the inner diameter of the gasket is smaller than the inner diameter of the through hole, and the gasket is in clearance fit with the transmission nut so as to limit radial shaking of the transmission nut.

6. The self-lubricating electric actuator of claim 1, wherein the end of the housing remote from the lead screw is provided with an oil drain hole.

7. A self-lubricating electric actuator as claimed in claim 1, wherein the drive nut extends out of the housing at an end remote from the motor and is threaded at that end for connection to an external terminal.

8. The self-lubricating electric actuator of claim 1, wherein a blanking cover is provided at the oil filler point.

9. The self-lubricating electric actuator of claim 1, wherein a first stop and a second stop are provided on the inner wall of the housing, respectively limiting the travel of the drive nut in a first direction and in a second direction opposite to the first direction.

10. The self-lubricating electric actuator of claim 1, wherein the small diameter of the threaded bore is larger than the bore diameter of the oil filler bore, such that the threaded bore and the oil filler bore form a stepped bore.