CN215733863U

CN215733863U - Improved electric push rod

Info

Publication number: CN215733863U
Application number: CN202121169758.XU
Authority: CN
Inventors: 戴庚庚; 邬金玲
Original assignee: Ningbo Jinxinli Intelligent Technology Co ltd
Current assignee: Ningbo Jinxinli Intelligent Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-02-01
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses an improved electric push rod which comprises a motor, a gear box, a worm wheel and a screw rod, wherein the motor is fixedly connected with the gear box, the worm wheel is arranged in the gear box, the output end of the motor is provided with a worm extending into the gear box, the worm wheel is meshed with the worm wheel, the worm wheel is arranged in a hollow mode, the worm wheel is sleeved outside the screw rod, and the inner wall of the worm wheel is provided with an internal thread matched with the screw rod. The utility model has simple and reasonable structure, convenient installation, lower manufacturing cost and stable and reliable working performance.

Description

Improved electric push rod

Technical Field

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

Background

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

The main structure and the working principle of various electric push rods on the market are basically the same. For example: chinese patent (application number is 202021128349.0) discloses a right angle electric putter, it includes the outer tube, the front end of outer tube is equipped with the chock plug, the rear end of outer tube is equipped with the gear box, the outer tube internal rotation is connected with the screw rod, install the nut of looks adaptation on the screw rod, the nut only rotates the cooperation with the outer tube, the screw rod upper shield is equipped with the inner tube, the rear end and the nut fixed connection of inner tube, the front end of inner tube is passed the chock plug and is worn out the outside of outer tube, the front end of inner tube is fixed with the connector, be fixed with the motor on the gear box, be equipped with the worm wheel in the gear box, worm wheel and screw rod fixed connection, be provided with the worm with worm wheel meshing on the output shaft of motor. The working principle of the electric push rod is as follows: when the motor is started, the motor drives the worm wheel to rotate through the worm, the worm wheel drives the screw to synchronously rotate, and in the rotating process of the screw, the nut and the outer pipe are in rotation stopping fit, so that the screw drives the nut to axially move along the screw, the inner pipe is further driven to synchronously move along with the nut, and linear reciprocating motion is realized. However, the above-mentioned electric push rod has the disadvantages that the structure is complex, the assembly is cumbersome and inconvenient, and the manufacturing cost is high because the nut and the inner tube are required to realize the power output.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and shortcomings of the prior art and provides an improved electric push rod which is simple and reasonable in structure, convenient to install, low in manufacturing cost and stable and reliable in working performance.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The improved electric push rod comprises a motor, a gear box, a worm wheel and a screw rod, wherein the motor is fixedly connected with the gear box, the worm wheel is arranged in the gear box, the output end of the motor is provided with a worm extending into the gear box, the worm is meshed with the worm wheel, the worm wheel is arranged in a hollow mode, the worm wheel is sleeved outside the screw rod, and the inner wall of the worm wheel is provided with an internal thread matched with the screw rod.

Further, the two ends of the worm wheel are respectively sleeved with bearings, and the worm wheel is rotatably arranged in the gear box through the two bearings.

Further, the worm wheel comprises a hollow cylindrical part, worm teeth meshed with the worm are arranged on the outer wall of the middle part of the cylindrical part in the circumferential direction, the cylindrical part is sleeved outside the screw rod, and the internal thread is arranged on the inner wall of the cylindrical part.

Further, step portions for sleeving the bearings are arranged at two ends of the cylindrical portion respectively.

Further, a containing groove for placing the bearing is formed in the gear box.

Furthermore, the gearbox is characterized by further comprising an outer tube sleeved outside the screw rod, one end of the outer tube is fixedly connected with the gearbox, and the other end of the outer tube is provided with a plug head.

Furthermore, the fixed cover in outside of screw rod is equipped with support piece, support piece with outer tube splines and sliding fit.

Further, one end of the screw rod, which is far away from the outer pipe, is provided with a shaft sleeve.

The utility model has the beneficial effects that: according to the improved electric push rod provided by the utility model, the inner threads matched with the screw rod are arranged on the inner wall of the worm wheel, in the working process, when the motor is started, the motor drives the worm wheel to rotate through the worm, and the worm wheel can directly drive the screw rod to axially move through the inner threads, so that the screw rod linearly reciprocates, and the power output is realized. Compared with the prior art, the utility model does not need to arrange a nut and an inner pipe, so that the structure is simpler and more reasonable, the installation is more convenient, the manufacturing cost is lower, and the working performance is stable and reliable.

Drawings

Fig. 1 is an overall perspective view of a first embodiment of the present invention.

Fig. 2 is an overall sectional view of the first embodiment of the present invention.

Fig. 3 is a structural view of a worm wheel according to a first embodiment of the present invention.

Fig. 4 is an overall perspective view of a second embodiment of the present invention.

Fig. 5 is an overall sectional view of a second embodiment of the present invention.

In FIGS. 1-5: 1. a motor; 2. a gear case; 21. a containing groove; 3. a worm gear; 31. a cylindrical portion; 32. a worm gear; 33. an internal thread; 34. a step portion; 4. a screw; 5. a worm; 6. a bearing; 7. an outer tube; 8. a plug head; 9. a support member; 10. and a shaft sleeve.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

The following is a description of a first embodiment of the present invention.

As shown in fig. 1-3, an improved electric push rod comprises a motor 1, a gear box 2, a worm wheel 3 and a screw rod 4, wherein the motor 1 is fixedly connected with the gear box 2, the worm wheel 3 is arranged in the gear box 2, an output end of the motor 1 is provided with a worm 5 extending into the gear box 2, and the worm 5 is meshed with the worm wheel 3.

Specifically, the worm wheel 3 is arranged in a hollow manner, the worm wheel 3 is sleeved outside the screw rod 4, and the inner wall of the worm wheel 3 is provided with an internal thread 33 matched with the screw rod 4. In this embodiment, the worm wheel 3 includes a hollow cylindrical portion 31, a middle outer wall of the cylindrical portion 31 is provided with a worm tooth 32 engaged with the worm 5 along a circumferential direction, the cylindrical portion 31 is sleeved outside the screw rod 4, and an internal thread 33 is provided on an inner wall of the cylindrical portion 31.

When the improved electric push rod provided by the embodiment is installed and used, the screw rod 4 is connected to a corresponding component to be driven, for example, the end of the screw rod 4 is connected to a smoke exhaust cover plate of a range hood (it should be noted that although the range hood is only taken as an example in the embodiment, the electric push rod provided by the utility model is not represented and is only suitable for the range hood), the screw rod 4 is stopped by the connection and matching of the screw rod 4 and the smoke exhaust cover plate, so that when the motor 1 is started, the motor 1 drives the worm wheel 3 to rotate through the worm 5, and the worm wheel 3 is in a rotating process, and the screw rod 4 is enabled to reciprocate relative to the worm wheel 3 along the axial direction through the matching action of the internal thread 33 and the screw rod 4, so that the smoke exhaust cover plate is driven to be automatically opened and closed.

Note that, even if the screw 4 is not attached to be locked in use, the screw 4 can be driven to move in the axial direction by the female screw 33 of the worm wheel 3 in practice, and the screw 4 can be moved slowly in the axial direction while being rotated.

In this embodiment, the two ends of the worm wheel 3 are respectively sleeved with the bearings 6, the worm wheel 3 is rotatably disposed in the gear box 2 through the two bearings 6, and specifically, the gear box 2 is internally provided with the accommodating groove 21 for the bearings 6 to be disposed. In this embodiment, stepped portions 34 to which the bearings 6 are fitted are provided at both ends of the cylindrical portion 31. Through setting up bearing 6 respectively at the both ends of worm wheel 3 for effectively having played abundant support to worm wheel 3, at the during operation, can avoid appearing the card phenomenon of dying because of worm wheel 3 that screw rod 4 rocked and cause with worm 5, ensured electric putter's normal, steady operation.

The following is an example two of the present invention.

The main structure and the working principle of the present embodiment are substantially the same as those of the first embodiment, except that referring to fig. 4 and 5, the present embodiment further includes an outer tube 7 sleeved outside the screw rod 4, one end of the outer tube 7 is fixedly connected with the gear box 2, and the other end of the outer tube 7 is provided with a plug 8. The outer part of the screw rod 4 is fixedly sleeved with a support piece 9, and the support piece 9 is in rotation stopping and sliding fit with the outer pipe 7. The end of the screw 4 remote from the outer tube 7 is provided with a sleeve 10.

The improved electric push rod provided by the embodiment can be directly applied to the occasions without connecting the screw rod 4 with the component to be driven, for example, the electric push rod can be applied to a door cover of a steaming oven. During operation, when worm wheel 3 rotates, through the cooperation of support piece 9 with outer tube 7, utilize support piece 9 to screw 4's guide effect for screw 4 only moves along the axial and can not rotate, and at this moment, can promote the automatic opening of steaming and baking oven's door closure through the axle sleeve 10 of screw 4 tip. The end part of the screw rod 4 is provided with the shaft sleeve 10, so that the screw rod 4 can be effectively prevented from directly contacting the door cover, and the door cover is protected.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.

Claims

1. The utility model provides an improved generation electric putter, includes motor, gear box, worm wheel and screw rod, the motor with gear box fixed connection, the worm wheel set up in the gear box, the output of motor be provided with stretch into in the worm in the gear box, the worm with the worm wheel meshing, its characterized in that: the worm wheel is arranged in a hollow mode, the worm wheel is sleeved outside the screw rod, and an internal thread matched with the screw rod is arranged on the inner wall of the worm wheel.

2. The improved power putter of claim 1, wherein: the both ends of worm wheel are overlapped respectively and are equipped with the bearing, the worm wheel passes through two the bearing rotationally set up in the gear box.

3. The improved power putter of claim 2, wherein: the worm wheel comprises a hollow cylindrical part, worm teeth meshed with the worm are arranged on the outer wall of the middle part of the cylindrical part along the circumferential direction, the cylindrical part is sleeved outside the screw rod, and the internal thread is arranged on the inner wall of the cylindrical part.

4. The improved power putter of claim 3, wherein: step parts for the bearing to be sleeved are arranged at two ends of the cylindrical part respectively.

5. The improved electric putter as claimed in any one of claims 2 to 4, wherein: and a containing groove for placing the bearing is formed in the gear box.

6. The improved power putter of claim 1, wherein: the gear box is characterized by further comprising an outer tube sleeved outside the screw rod, one end of the outer tube is fixedly connected with the gear box, and a plug head is arranged at the other end of the outer tube.

7. The improved power putter of claim 6, wherein: the fixed cover in outside of screw rod is equipped with support piece, support piece with outer tube splines and sliding fit.

8. The improved power putter of claim 6, wherein: and one end of the screw rod, which is far away from the outer pipe, is provided with a shaft sleeve.