CN204342348U - Jack - Google Patents
Jack Download PDFInfo
- Publication number
- CN204342348U CN204342348U CN201420745777.6U CN201420745777U CN204342348U CN 204342348 U CN204342348 U CN 204342348U CN 201420745777 U CN201420745777 U CN 201420745777U CN 204342348 U CN204342348 U CN 204342348U
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- CN
- China
- Prior art keywords
- screw rod
- threaded shank
- internal thread
- sub
- thread hole
- 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.)
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Abstract
The utility model provides a kind of jack, comprising: base, female screw rod and sub-screw rod; Female screw flight is connected on base, and to be stretched out relative to base by the back-out of screw thread or precession or retract; Female screw rod arranges internal thread hole; Sub-screw rod comprises threaded shank; Threaded shank arranges the outside thread matched with internal thread hole; Sub-screw rod is threaded in internal thread hole by threaded shank, and to be stretched out relative to female screw rod by the back-out of screw thread or precession or retract.The beneficial effects of the utility model are: reasonable in design, structure is simple, can increase height adjustment range, thus improves work efficiency, and safety and stability.
Description
Technical field
The utility model relates to lifting field, particularly a kind of jack.
Background technology
On numerically-controlled machine tool during processing work, need to compress workpiece, during clamping, the front end of pressing plate is pressed on workpiece, and rear end jack supports.Common jack is that a tapped base and an externally threaded screw rod of band are formed, and during use, one end of pressing plate is pressed on workpiece, other end jack supports, and bolt is put in centre, by adjusting the height of jack, make the front and back end height of pressing plate consistent, workpiece pressing.Because the position height of the compression of workpiece is different, so the height of jack will have certain setting range.Traditional jack is owing to adopting a screw rod, so adjustment is height-limited, when the excessive height at Work-sheet pressing position, just need to add cushion block below jack base, a lot of cushion blocks will be prepared like this, and the non-cutting time of clamping be extended, reduces work efficiency.
Utility model content
The purpose of this utility model is to provide the jack that a kind of reasonable in design, structure is simple, can increase height adjustment range.
For achieving the above object, the technical scheme that the utility model adopts is:
A kind of jack, comprising: base, female screw rod and sub-screw rod;
Described female screw flight is connected on described base, and to be stretched out relative to described base by the back-out of screw thread or precession or retract;
Described female screw rod arranges internal thread hole;
Described sub-screw rod comprises threaded shank;
Described threaded shank arranges the outside thread matched with described internal thread hole;
Described sub-screw rod is threaded in described internal thread hole by described threaded shank, and is stretched out by the back-out of screw thread or precession relative to described female screw rod or retract.
More preferably, described sub-screw rod comprises top cap;
Described top cap is fixedly connected on the side of described threaded shank, and described top cap is greater than the sectional area of described threaded shank perpendicular to axis direction perpendicular to the sectional area of described threaded shank axis direction.
More preferably, the length of described internal thread hole is greater than the length of described threaded shank.
More preferably, described female screw rod comprises accommodation section;
Described accommodation section is connected with described internal thread hole, for holding described top cap during internal thread hole described in the described threaded shank precession of described sub-screw rod.
More preferably, the outside thread of described threaded shank setting and the negative thread of the interior setting of described internal thread hole are Acme thread.
The beneficial effects of the utility model are: reasonable in design, structure is simple, can increase height adjustment range, thus improves work efficiency, and safety and stability.
Accompanying drawing explanation
Fig. 1 is jack one example structure schematic diagram of the present utility model;
Wherein: 1 base; 2 female screw rods; 3 sub-screw rods; 4 internal thread holes; 5 threaded shank; 6 top caps; 7 accommodation sections.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, jack of the present utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of jack, comprising: base 1, female screw rod 2 and sub-screw rod 3;
Female screw rod 2 is threaded on base 1, and to be stretched out relative to base 1 by the back-out of screw thread or precession or retract;
Female screw rod 2 arranges internal thread hole 4;
Sub-screw rod 3 comprises threaded shank 5;
Threaded shank 5 arranges the outside thread matched with internal thread hole 4;
Sub-screw rod 3 is threaded in internal thread hole 4 by threaded shank 5, and is stretched out by the back-out of screw thread or precession relative to female screw rod 2 or retract.
Adopt such frame mode, not only reasonable in design, structure is simple, and to be stretched out relative to female screw rod 2 by sub-screw rod 3 and withstood on by the parts that support by sub-screw rod 3, can increase the height adjustment range of this jack, and support effect safety and stability.
More preferably, as a kind of embodiment of the present utility model, sub-screw rod 3 comprises top cap 6;
Top cap 6 is fixedly connected on the side of threaded shank 5, and pushes up cap 6 and be greater than the sectional area of threaded shank 5 perpendicular to axis direction perpendicular to the sectional area of threaded shank 5 axis direction.
In real work, be connected in supported member by top cap 6, and push up cap 6 and be greater than the sectional area of threaded shank 5 perpendicular to axis direction perpendicular to the sectional area of threaded shank 5 axis direction, top cap 6 and the contact area of supported member can be made to become larger, make support works become safety and stability more.
More preferably, as a kind of embodiment of the present utility model, the length of internal thread hole 4 is greater than the length of threaded shank 5.
Like this when working under the environment that this jack needs at lower height; can sub-screw rod 3 be screwed in female screw rod 2 completely; what now bear bearing stress is female screw rod 2; now the threaded shank 5 of sub-screw rod 3 does not bear bearing stress; the threaded shank 5 of sub-screw rod 3 and the internal thread hole 4 of female screw rod 2 can be protected like this, its service life is extended greatly.
More preferably, as a kind of embodiment of the present utility model, female screw rod 2 comprises accommodation section 7;
Accommodation section 7 is connected with internal thread hole 4, for holding top cap 6 when the threaded shank 5 precession internal thread hole 4 of sub-screw rod 3.
Like this when working under the environment that this jack needs at lower height; can the threaded shank 5 of sub-screw rod 3 be screwed in the internal thread hole 4 in female screw rod 2 completely, at this moment push up cap 6 and be received portion 7 completely and hold, now support works; completed by female screw rod 2, thus protect sub-screw rod 3.
More preferably, as a kind of embodiment of the present utility model, the outside thread that threaded shank 5 is arranged and the interior negative thread arranged of internal thread hole 4 are Acme thread.
Above embodiment makes the utility model have: reasonable in design, structure is simple, can increase height adjustment range, thus improves work efficiency, and the advantage of safety and stability.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a jack, is characterized in that:
Comprise: base, female screw rod and sub-screw rod;
Described female screw flight is connected on described base, and to be stretched out relative to described base by the back-out of screw thread or precession or retract;
Described female screw rod arranges internal thread hole;
Described sub-screw rod comprises threaded shank;
Described threaded shank arranges the outside thread matched with described internal thread hole;
Described sub-screw rod is threaded in described internal thread hole by described threaded shank, and is stretched out by the back-out of screw thread or precession relative to described female screw rod or retract.
2. jack according to claim 1, is characterized in that:
Described sub-screw rod comprises top cap;
Described top cap is fixedly connected on the side of described threaded shank, and described top cap is greater than the sectional area of described threaded shank perpendicular to axis direction perpendicular to the sectional area of described threaded shank axis direction.
3. jack according to claim 2, is characterized in that:
The length of described internal thread hole is greater than the length of described threaded shank.
4. jack according to claim 3, is characterized in that:
Described female screw rod comprises accommodation section;
Described accommodation section is connected with described internal thread hole, for holding described top cap during internal thread hole described in the described threaded shank precession of described sub-screw rod.
5. the jack according to Claims 1-4 any one, is characterized in that:
The outside thread that described threaded shank is arranged and the interior negative thread arranged of described internal thread hole are Acme thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745777.6U CN204342348U (en) | 2014-12-01 | 2014-12-01 | Jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745777.6U CN204342348U (en) | 2014-12-01 | 2014-12-01 | Jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204342348U true CN204342348U (en) | 2015-05-20 |
Family
ID=53225634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420745777.6U Active CN204342348U (en) | 2014-12-01 | 2014-12-01 | Jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204342348U (en) |
-
2014
- 2014-12-01 CN CN201420745777.6U patent/CN204342348U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |