CN220273425U

CN220273425U - Electric push rod

Info

Publication number: CN220273425U
Application number: CN202223158725.2U
Authority: CN
Inventors: 戴庚庚; 邬金玉
Original assignee: Ningbo Jinxinli Intelligent Technology Co ltd
Current assignee: Ningbo Jinxinli Intelligent Technology Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-12-29
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to an electric push rod, which comprises an outer tube, a telescopic connecting rod, a motor and a gear box, wherein the rear end cover of the outer tube is provided with the gear box, the front end cover of the outer tube is provided with an outer tube plug, a screw rod is connected in the outer tube, a nut is arranged on the screw rod and is in rotation-stopping fit with the outer tube, and the nut is fixedly connected with the telescopic connecting rod; the telescopic connecting rod passes through the outer pipe plug and extends out of the outer pipe; be equipped with the worm wheel in the gear box, the rear end that the worm wheel was fixed in the lead screw is fixed with the motor casing on the gear box, the motor sets up in the motor casing, be equipped with the worm on the output shaft of motor, the motor casing is equipped with the electric wire hole, the power cord of motor is worn in the outside of motor casing by the electric wire hole, be provided with sealing washer and/or sealed sponge between the one end that is close to the gear box of motor casing and the motor, be provided with in the electric wire hole and cup joint in the outside sealed protective coil of power cord, can greatly improve electric putter's leakproofness, reduce electric putter's adhesion of greasy dirt in the use, increase of service life.

Description

Electric push rod

Technical Field

The utility model relates to an electric motor the technical field of push rods is that, in particular to an electric push rod.

Background

The electric push rod is an electric driving device for converting the rotation motion of an electric motor into the linear reciprocating motion of the push rod, and is used as an executing machine in various simple or complex process flows so as to realize remote control, centralized control or automatic control. The motor drive unit is widely applied to the industries of household appliances, kitchen ware, medical appliances, automobiles and the like.

Under certain application occasions, the sealing dustproof requirement on the motor of the electric push rod is higher, and in the prior art, the motor of the electric push rod is usually in direct contact with an application environment, so that the existing electric push rod is difficult to meet the application occasions with higher sealing dustproof requirement on the motor of the electric push machine, for example, under the environment that the application environment is a kitchen, in the long-time use process of the electric push machine, oil smoke can enter the motor to influence the working efficiency of the motor, thereby influencing the use performance of the electric push machine, for example, chinese patent (publication number is: CN 215871054U) an electric putter, including outer tube and inner tube, the outer tube rear end is equipped with the gear box, be provided with the lead screw in the outer tube, install the nut of looks adaptation at the front end of lead screw, the inner tube rear end with nut fixed connection, be connected with a connector behind the outer tube front end is worn out to the inner tube front end, be fixed with motor assembly on the gear box, be equipped with intermeshing's worm and worm wheel in the gear box, the worm is connected with motor assembly transmission, worm wheel and lead screw fixed connection, integrated into one piece has first step in the gear box die-casting has the bearing is installed on the first step, the bearing with lead screw normal running fit still overlaps the concentric seat that is located the bearing front end at the rear end of lead screw, the outer wall of concentric seat offsets with the gear box inner wall, just concentric seat, bearing and worm wheel are spacing in proper order in the gear box can reduce cost effectively, improve concentricity, avoid simultaneously during operation worm wheel axial to move and produce the noise.

However, the electric push rod has the following defects: the sealing effect is poor, and in the long-time use process of the electric push rod, oil smoke can enter the motor, the working efficiency of the motor is affected, and therefore the service performance of the electric push rod is affected.

Disclosure of Invention

Aiming at the defects and shortcomings of the prior art, the utility model provides the electric push rod which is simple and reasonable in structure, good in sealing effect on a motor and beneficial to prolonging the service life.

In order to achieve the aim, the utility model adopts the following technical scheme that the electric push rod comprises an outer tube, a telescopic connecting rod, a motor and a gear box, wherein the rear end cover of the outer tube is provided with the gear box, the front end cover of the outer tube is provided with an outer tube plug, the outer tube is rotationally connected with a screw rod, an adaptive nut is arranged on the screw rod, the nut is in anti-rotation fit with the outer tube, and the nut is fixedly connected with the rear end of the telescopic connecting rod; the front end of the telescopic connecting rod passes through the outer pipe plug head and extends out of the outer pipe; the motor is characterized in that a worm wheel is arranged in the gear box and fixed at the rear end of the screw rod, a motor shell is fixed on the gear box, a motor is arranged in the motor shell, a worm matched with the worm wheel is arranged on an output shaft of the motor, an electric wire hole is formed in the motor shell, a power wire of the motor penetrates through the outer portion of the motor shell through the electric wire hole, a sealing ring and/or a sealing sponge is arranged between one end, close to the gear box, of the motor shell and the motor, and a sealing protection coil sleeved outside the power wire is arranged in the electric wire hole.

Further, a ball bearing and a bearing fixing seat are further arranged in the gear box, the ball bearing is installed in the gear box through the bearing fixing seat, and the screw rod is rotationally connected with the gear box through the ball bearing.

Further, a first sealing rubber pad is arranged at the joint of the gear box and the outer tube.

Further, the outer tube internal fixation is provided with the outside silica gel gasket of cover locating the lead screw, and the silica gel gasket is laminated with the one end of keeping away from ball bearing of bearing fixing base.

Further, a second sealing rubber pad is arranged at the joint of the outer pipe plug and the outer pipe.

Further, the outside cover of flexible connecting rod is equipped with sealed flexible sheath, and sealed flexible sheath's one end and outer tube chock plug fixed connection are sealed, and sealed flexible sheath's the other end and flexible connecting rod's front end fixed connection are sealed.

Further, the sealed telescopic sheath is made of flexible materials.

Further, the sealing telescopic sheath is arranged in a corrugated shape.

Further, the worm wheel is fixedly connected with the screw rod through a pin rod.

The beneficial effects of the utility model are as follows: according to the utility model, the sealing rubber pad, the sealing ring, the sealing sponge, the sealing protection coil and the silica gel gasket are arranged, so that the sealing performance of the electric push rod can be greatly improved, the phenomenon that oil stains adhere to the outer part of the telescopic connecting rod, the outer part of the motor or the inner part of the motor and the outer part of the screw rod in the long-time use process of the electric push rod can be effectively reduced, the use of the electric push rod is influenced, and the service life of the electric push rod is prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of the present utility model in an exploded state at a first view angle;

FIG. 3 is a schematic view of the structure of the present utility model at a second view angle in an exploded state;

fig. 4 is a schematic cross-sectional structure of the present utility model.

In fig. 1-4: 1. an outer tube; 2. an outer tube plug; 3. a nut; 4. a first sealing rubber pad; 5. a screw rod; 6. a second sealing rubber pad; 7. a telescopic connecting rod; 8. sealing the telescopic sheath; 9. a silica gel pad; 10. a bearing fixing seat; 11. a ball bearing; 12. a pin rod; 13. a worm wheel; 14. a gear box; 15. a seal ring; 16. sealing the sponge; 17. a motor; 18. a housing; 19. sealing the protective coil; 20. a power line; 21. a worm.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The electric push rod as shown in the figures 1-4 comprises an outer tube 1, a telescopic connecting rod 7, a motor 17 and a gear box 14, wherein the gear box 14 is arranged at the rear end cover of the outer tube 1, a screw rod 5 is connected in a rotating manner in the outer tube 1, an adaptive nut 3 is arranged on the screw rod 5, the nut 3 is in anti-rotation fit with the outer tube 1, and the nut 3 is fixedly connected with the rear end of the telescopic connecting rod 7; the front end of the telescopic connecting rod 7 passes through the outer pipe plug 2 and extends out of the outer pipe 1; specifically, a first sealing rubber pad 4 is arranged at the joint of the gear box 14 and the outer tube 1. The sealing effect can be effectively achieved, oil stains are prevented from entering the outside of the screw rod 5, the viscosity is possibly increased due to long-time oil fume accumulation on the surface of the screw rod 5, the resistance is increased, and the normal use of the screw rod 5 is affected; when the range hood is started, the pushing current of the electric push rod rises to exceed the limiting current value set by the circuit board of the range hood, so that the normal use of the electric push rod is affected.

Preferably, in this embodiment, the front end cover of outer tube 1 is provided with outer tube plug 2, the junction of outer tube plug 2 and outer tube 1 is provided with second sealing rubber pad 6, through setting up second sealing rubber pad 6 between outer tube plug 2 and outer tube 1, can play sealed effect effectively, prevent that the greasy dirt from getting into, influence the use.

Preferably, in this embodiment, the outer portion of the telescopic connecting rod 7 is sleeved with a sealed telescopic sheath 8, one end of the sealed telescopic sheath 8 is fixedly connected with the outer pipe plug 2 in a sealing manner, and the other end of the sealed telescopic sheath 8 is fixedly connected with the front end of the telescopic connecting rod 7 in a sealing manner. Preferably, in this embodiment, the sealing telescopic sheath 8 is made of a flexible material, and specifically, the sealing telescopic sheath 8 is provided in a corrugated shape. The sealed shrink flexible 8 can shrink along with the removal of flexible connecting rod 7, can effectively play the prevention greasy dirt and get into the outside that adheres to at flexible connecting rod 7, influence the normal use of flexible connecting rod 7.

A worm wheel 13 is arranged in the gear box 14, the worm wheel 13 is fixed at the rear end of the screw rod 5, a motor casing 18 is fixed on the gear box 14, a motor 17 is arranged in the motor casing 18, a worm 21 matched with the worm wheel 13 is arranged on an output shaft of the motor 17, preferably, in this embodiment, a ball bearing 11 and a bearing fixing seat 10 are further disposed in the gear box 14, the ball bearing 11 is installed in the gear box 14 through the bearing fixing seat 10, and the screw rod 5 is rotationally connected with the gear box 14 through the ball bearing 11. Preferably, in this embodiment, the worm wheel 13 is fixedly connected to the screw 5 through a pin 12.

Preferably, in this embodiment, the outer tube 1 is fixedly provided with a silica gel pad 9 sleeved outside the screw rod 5, and the silica gel pad 9 is attached to one end of the bearing fixing seat 10, which is far away from the ball bearing 11. The provision of the silicone gasket 9 can further enhance the sealing effect and reduce the ingress of oil stains attached to the outside of the screw rod 5, thereby affecting the normal use of the screw rod 5, preferably, since the silicone gasket 9 is a soft material, when the electric push rod is retracted to a minimum distance, at this time, since the silicone gasket 9 is sandwiched, therefore, the bearing fixing seat 10, the ball bearing 11 and the worm wheel 13 can be prevented from being propped up, the motor 17 is blocked and cannot extend out, the worm wheel 13 is guaranteed to rotate, and the problem that the motor 17 generates heat and damages parts due to the fact that the worm wheel 13 cannot rotate when the motor 17 is continuously operated due to the fact that the ball bearing 11, the bearing fixing seat 10 and the worm wheel 13 are all propped up is avoided.

Preferably, in this embodiment, the motor casing 18 is provided with an electric wire hole, the power wire 20 of the motor 17 is penetrated out of the motor casing 18 by the electric wire hole, a sealing ring 15 and/or a sealing sponge 16 is provided between one end of the motor casing 18, which is close to the gear case 14, and the motor 17, the sealing ring 15 and the sealing sponge 16 are provided to effectively achieve a sealing effect, reduce oil stains entering the motor 17, adhere to the surface or the inside of the motor 17, and the long-time accumulation of the oil stains may cause the current increase of the motor 17, thereby affecting the normal operation of the electric putter.

A sealing protecting coil 19 sleeved outside the power wire 20 is arranged in the wire hole. The sealing protection coil 19 can further play a role in sealing, so that oil stains are reduced from entering the motor 17 from the power line 20 of the shell 18 and are attached to the surface or the inside of the motor 17, and the normal use of the motor 17 is affected.

The foregoing description is only of the preferred embodiments of the utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.

Claims

1. The utility model provides an electric putter, includes outer tube (1), flexible connecting rod (7), motor (17) and gear box (14), the rear end cap of outer tube (1) is equipped with gear box (14), the front end cap of outer tube (1) is provided with outer tube plug (2), outer tube (1) internal rotation is connected with lead screw (5), install nut (3) of looks adaptation on lead screw (5), nut (3) and outer tube (1) are locked the commentaries on classics cooperation, nut (3) and the rear end fixed connection of flexible connecting rod (7); the front end of the telescopic connecting rod (7) passes through the outer pipe plug (2) and extends out of the outer pipe (1); be equipped with worm wheel (13) in gear box (14), worm wheel (13) are fixed in the rear end of lead screw (5), be fixed with motor casing (18) on gear box (14), motor (17) set up in motor casing (18), be equipped with on the output shaft of motor (17) with worm (21) of worm wheel (13) looks adaptation, motor casing (18) are equipped with the electric wire hole, and the outside in motor casing (18) is worn by the electric wire hole in power cord (20) of motor (17), its characterized in that: a sealing ring (15) and/or a sealing sponge (16) are arranged between one end, close to the gear box (14), of the motor shell (18) and the motor (17), and a sealing protection coil (19) sleeved outside the power wire (20) is arranged in the wire hole.

2. An electric putter according to claim 1, wherein: the novel gear box is characterized in that a ball bearing (11) and a bearing fixing seat (10) are further arranged in the gear box (14), the ball bearing (11) is installed in the gear box (14) through the bearing fixing seat (10), and the screw rod (5) is rotationally connected with the gear box (14) through the ball bearing (11).

3. An electric putter according to claim 1, wherein: a first sealing rubber pad (4) is arranged at the joint of the gear box (14) and the outer tube (1).

4. An electric putter according to claim 2, wherein: the outer tube (1) internal fixation is provided with the silica gel gasket (9) of cover locating the outside of lead screw (5), and the one end laminating of keeping away from ball bearing (11) of silica gel gasket (9) and bearing fixing base (10).

5. An electric putter according to claim 1, wherein: the joint of the outer pipe plug (2) and the outer pipe (1) is provided with a second sealing rubber pad (6).

6. An electric putter according to claim 1, wherein: the outside cover of flexible connecting rod (7) is equipped with sealed flexible sheath (8), and the one end of sealed flexible sheath (8) is fixed connection with outer tube chock plug (2) sealedly, and the other end of sealed flexible sheath (8) is fixed connection with the front end of flexible connecting rod (7) sealedly.

7. The electric putter of claim 6, wherein: the sealing telescopic sheath (8) is made of flexible materials.

8. An electric putter according to claim 6 or 7, wherein: the sealing telescopic sheath (8) is arranged in a corrugated shape.

9. An electric putter according to claim 1, wherein: the worm wheel (13) is fixedly connected with the screw rod (5) through a pin rod (12).