CN202790377U - Electric push rod - Google Patents
Electric push rod Download PDFInfo
- Publication number
- CN202790377U CN202790377U CN 201220415423 CN201220415423U CN202790377U CN 202790377 U CN202790377 U CN 202790377U CN 201220415423 CN201220415423 CN 201220415423 CN 201220415423 U CN201220415423 U CN 201220415423U CN 202790377 U CN202790377 U CN 202790377U
- Authority
- CN
- China
- Prior art keywords
- worm gear
- worm wheel
- nut
- overcoat
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an electric push rod which comprises a shell, a nut screw pair, a metal outer tube fixedly arranged on the shell and a power piece capable of rotating positively and negatively. The nut screw pair comprises a nut and a lead screw. The power piece drives the lead screw to rotate through a worm wheel pair. A worm wheel of the worm wheel pair is sleeved on the lead screw. The nut is slidingly installed in the metal outer tube and is provided with a metal inner tube. The electric push rod further comprises a worm wheel inner sleeve and a worm wheel outer sleeve. The worm wheel outer sleeve is fixedly arranged at one end of the metal outer tube, an outer ring of the worm wheel inner sleeve is slidingly connected with the worm wheel outer sleeve, and an inner ring of the worm wheel inner sleeve is slidingly connected with the worm wheel. According to the electric push rod provided by the utility model, the self-locking capacity can be improved.
Description
Technical field
The utility model relates to a kind of machinery that can reciprocating sliding, specifically, relates to a kind of electric pushrod.
Background technique
At present, the electric pushrod of prior art is if realize the words of self-locking, need to install in addition break additional, cost is larger, and the mode that the employing that also has reduces the helix angle of leading screw realizes, but transmission efficiency must descend, what also have uses full-bodied lubricating grease at transmission part, and this can bring certain frictional force, increases auto-lock function, but can cause equally transmission efficiency to descend, and the life-span comparison of coherence is poor.
Summary of the invention
The purpose of this utility model is the defective that overcomes prior art, and a kind of electric pushrod that can improve self self-lock force is provided.
The technological scheme that realizes the utility model purpose is: a kind of electric pushrod, comprise shell, nut screw is secondary, but be fixed on the force piece of metal outer pipe on the shell and clockwise and anticlockwise, the nut screw pair comprises nut and leading screw, force piece drives the leading screw rotation by worm gear pair, the worm gear set of worm gear pair is contained on the screw mandrel, nut is slidably mounted in the metal outer pipe, metal inner pipe is installed on the nut, also comprise worm gear inner sleeve and worm gear overcoat, the worm gear overcoat is fixed on an end of metal outer pipe, the outer ring of worm gear inner sleeve and worm gear overcoat are slidingly connected, and inner ring and the worm gear of worm gear inner sleeve are slidingly connected.
Further, be provided with draw-in groove on the described metal outer pipe, described worm gear puts the card convex that is provided with draw-in groove phase scarf outward.
Further, described card convex has two, and is symmetricly set on the cylindrical of worm gear overcoat, and described draw-in groove correspondingly also is provided with two.
After having adopted technique scheme, force piece work, the rotation of drive worm gear, thereby drive the leading screw rotation, it is mobile forward or backward that leading screw orders about nut, thereby so that metal inner pipe reach or after move, be enclosed within the worm gear between worm gear and the worm gear overcoat force of sliding friction is arranged, and the worm gear overcoat is fixed, thereby when metal inner pipe stops, can playing to the motional inertia of worm gear certain braking action, thereby reach the effect of self-locking, and the cooperation of worm gear overcoat and worm gear inner sleeve can be played to metal inner pipe the effect of certain supplemental support, indirect protection metal inner pipe; Draw-in groove cooperates so that be not easy to produce slip phenomenon between metal outer pipe and the worm gear overcoat with card convex.
Description of drawings
Fig. 1 is the structural representation of electric pushrod of the present utility model;
Fig. 2 is the structural representation of worm gear overcoat of the present utility model;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the structural representation of metal-coating of the present utility model;
Fig. 5 is the right elevation of Fig. 4.
Embodiment
Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model according to specific embodiment also by reference to the accompanying drawings,
Shown in Fig. 1 ~ 5, a kind of electric pushrod, comprise shell 9, nut screw is secondary, but be fixed on metal outer pipe 1 on the shell 9 and the force piece 2 of clockwise and anticlockwise, the nut screw pair comprises nut 3 and leading screw 4, force piece 2 drives leading screw 4 rotations by worm gear pair, the worm gear 8 of worm gear pair is sleeved on the screw mandrel 4, nut 3 is slidably mounted in the metal outer pipe 1, metal inner pipe 5 is installed on the nut 3, also comprise worm gear inner sleeve 6 and worm gear overcoat 7, worm gear overcoat 7 is fixed on an end of metal outer pipe 1, and the outer ring of worm gear inner sleeve 6 and worm gear overcoat 7 are slidingly connected, and the inner ring of worm gear inner sleeve 6 and worm gear 8 are slidingly connected.
Shown in Fig. 2 ~ 5, be provided with draw-in groove 1-1 on the metal outer pipe 1, be provided with the card convex 7-2 with draw-in groove 1-1 phase scarf on the worm gear overcoat 7.Card convex 7-2 has two, and is symmetricly set on the cylindrical of worm gear overcoat 7, and draw-in groove 1-1 correspondingly also is provided with two.
The worm-wheel shaft of worm gear 8 can be rotated to support in the shell 9 by bearing or the termination of screw mandrel 4 can be rotated to support in the shell 9 by bearing.Metal outer pipe 1 can support metal inner pipe 5 by supporting element 10.
The quantity of worm gear inner sleeve 6 and worm gear overcoat 7 is not limited to one.
Working principle of the present utility model is as follows:
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. electric pushrod, comprise shell (9), nut screw is secondary, be fixed on the shell (9) metal outer pipe (1) but and the force piece of clockwise and anticlockwise (2), the nut screw pair comprises nut (3) and leading screw (4), force piece (2) drives leading screw (4) rotation by worm gear pair, the worm gear of worm gear pair (8) is sleeved on the screw mandrel (4), nut (3) is slidably mounted in the metal outer pipe (1), metal inner pipe (5) is installed on the nut (3), it is characterized in that: also comprise worm gear inner sleeve (6) and worm gear overcoat (7), worm gear overcoat (7) is fixed on an end of metal outer pipe (1), the outer ring of worm gear inner sleeve (6) and worm gear overcoat (7) are slidingly connected, and the inner ring of worm gear inner sleeve (6) and worm gear (8) are slidingly connected.
2. electric pushrod according to claim 1 is characterized in that: be provided with draw-in groove (1-1) on the described metal outer pipe (1), be provided with the card convex (7-2) with draw-in groove (1-1) phase scarf on the described worm gear overcoat (7).
3. electric pushrod according to claim 2, it is characterized in that: described card convex (7-2) has two, and is symmetricly set on the cylindrical of worm gear overcoat (7), and described draw-in groove (1-1) correspondingly also is provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415423 CN202790377U (en) | 2012-08-21 | 2012-08-21 | Electric push rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415423 CN202790377U (en) | 2012-08-21 | 2012-08-21 | Electric push rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790377U true CN202790377U (en) | 2013-03-13 |
Family
ID=47817643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220415423 Expired - Fee Related CN202790377U (en) | 2012-08-21 | 2012-08-21 | Electric push rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508577A (en) * | 2015-12-30 | 2016-04-20 | 常州市鑫尔减速机有限公司 | Sleeve type speed reducer |
-
2012
- 2012-08-21 CN CN 201220415423 patent/CN202790377U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508577A (en) * | 2015-12-30 | 2016-04-20 | 常州市鑫尔减速机有限公司 | Sleeve type speed reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20140821 |
|
| EXPY | Termination of patent right or utility model |