CN203363038U - Nut anti-rotating mechanism of lead screw nut drive pair - Google Patents
Nut anti-rotating mechanism of lead screw nut drive pair Download PDFInfo
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- CN203363038U CN203363038U CN2013203370270U CN201320337027U CN203363038U CN 203363038 U CN203363038 U CN 203363038U CN 2013203370270 U CN2013203370270 U CN 2013203370270U CN 201320337027 U CN201320337027 U CN 201320337027U CN 203363038 U CN203363038 U CN 203363038U
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- nut
- clamp
- lead screw
- hydraulic system
- fastening device
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Abstract
The utility model discloses a nut anti-rotating mechanism of a lead screw nut drive pair. The nut anti-rotating mechanism of the lead screw nut drive pair comprises a clamping mechanism and a hydraulic system. The hydraulic system drives the clamping mechanism to loose or clamp a nut of the lead screw nut drive pair. When the hydraulic system drives the clamping mechanism to loose the nut of the lead screw nut drive pair, the nut can be rotated, and when the hydraulic system drives the clamping mechanism to clamp the nut of the lead screw nut drive pair, the nut can not be rotated. According to the technical scheme, the nut anti-rotating mechanism can control rotation of the nut relative to a lead screw, and then the nut conducts linear motion on the lead screw or is driven by the lead screw to synchronously conduct rotating motion with the lead screw.
Description
Technical field
The utility model relates to the technical field of screw nut driven device, relates in particular to a kind of nut rotation-preventing mechanism of screw nut driven pair.
Background technique
In the screw nut driven pair, normally rotatablely moving of leading screw changed into to the straight line motion of nut.The nut rotation-preventing mechanism of prior art can't be realized the rotation of the relative leading screw of nut, can only make nut synchronous moving linearly under the drive of leading screw.But often can encounter situation in reality: within designing requirement a period of time, need nut to follow leading screw and together rotate, do not need the nut moving linearly; In another period, need nut not rotate, need the nut moving linearly, and this nut rotation with non-rotary interval time length be uncertain, prior art can't meet above design requirement.
The model utility content
In view of this, the utility model provides a kind of nut rotation-preventing mechanism of screw nut driven pair, and this nut rotation-preventing mechanism can prevent the rotation of the relative leading screw of nut.
A kind of nut rotation-preventing mechanism of screw nut driven pair, comprise fastening device and hydraulic system, and hydraulic system drives fastening device to unclamp or clamp the nut of screw nut driven pair; When hydraulic system drives fastening device to unclamp the nut of screw nut driven pair, nut can rotate, and when hydraulic system drives fastening device to clamp the nut of screw nut driven pair, nut can not rotate.
Wherein, described hydraulic system comprises the double end hydraulic jack, and fastening device is connected to two output terminals of described double end hydraulic jack.
Wherein, also comprise nut bracket, described fastening device comprises two groups of symmetrically arranged clamp assemblies; Every group of described clamp assembly comprises clamp arm and clamp, and middle part and the nut bracket of described clamp arm are hinged, and an output terminal of an end of described clamp arm and double end hydraulic jack is hinged, and the other end and clamp are hinged; When the output terminal of described double end hydraulic jack stretches out, by described clamp arm, drive described clamp turnbuckle, when the output terminal of described double end hydraulic jack bounces back, drive described clamp by described clamp arm and unclamp nut.
Wherein, the one side that described clamp contacts with nut is curved.
The beneficial effects of the utility model are: a kind of nut rotation-preventing mechanism of screw nut driven pair, comprise fastening device and hydraulic system, and hydraulic system drives fastening device to unclamp or clamp the nut of screw nut driven pair; When hydraulic system drives fastening device to unclamp the nut of screw nut driven pair, nut can rotate, and when hydraulic system drives fastening device to clamp the nut of screw nut driven pair, nut can not rotate.The nut rotation-preventing mechanism of the technical program can be controlled the rotation of the relative leading screw of nut, thereby realizes nut moving linearly or rotate with screw synchronous under the drive of leading screw on leading screw.
The accompanying drawing explanation
The sectional drawing that Fig. 1 is nut rotation-preventing mechanism of the present utility model;
The stereogram that Fig. 2 is nut rotation-preventing mechanism of the present utility model;
In figure:
1-double end hydraulic jack; 2-clamp arm; 3-clamp; 4-nut bracket; 5-nut.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, only show the part relevant to the utility model in accompanying drawing but not entire infrastructure.
As shown in Figure 1, 2, be respectively sectional drawing and the stereogram that takes the nut rotation-preventing mechanism of the present utility model.
The nut rotation-preventing mechanism of this screw nut driven pair, comprise fastening device and hydraulic system, and hydraulic system drives fastening device to unclamp or clamp the nut 5 of screw nut driven pair; When hydraulic system drives fastening device to unclamp the nut 5 of screw nut driven pair, nut 5 can rotate, and when hydraulic system drives fastening device to clamp the nut 5 of screw nut driven pair, nut 5 can not rotate.
Rotation-preventing mechanism in this example also comprises nut bracket 4.Hydraulic system comprises double end hydraulic jack 1, and this double end hydraulic jack 1 has two output terminals, i.e. piston rods.Fastening device comprises two groups of symmetrically arranged clamp assemblies; Every group of described clamp assembly comprises clamp arm 2 and clamp 3, and the middle part of described clamp arm 2 and nut bracket 4 are hinged, and an output terminal of an end of described clamp arm 2 and double end hydraulic jack 1 is hinged, and the other end and clamp 3 are hinged.When the output terminal of double end hydraulic jack 1 stretches out, by described clamp arm 2, drive described clamp 3 turnbuckles 5, when the output terminal of described double end hydraulic jack 1 bounces back, drive described clamp 3 by described clamp arm 2 and unclamp nut 5.Clamp arm 2 is hinged with being connected to of this nut bracket 4, double end hydraulic jack 1 is to adjust better the orientation of self when driving clamp 3 motion for clamp arm 2.
In another preferred embodiment, the clamp arm 2 of every group of clamp assembly is two.Clamp 3 is curved with the one side that nut 5 contacts, and makes clamp 3 tightr with contacting of nut 5 when turnbuckle 5, thereby it can be held tightly.Clamp 3 can adopt rubber material, improves wear resistance and the friction factor thereof of clamp 3, to improve the effect of holding tightly of 3 pairs of nuts 5 of clamp.
Double end hydraulic jack 1 is provided with the electric elementss such as control switch, by simple electrical signal, disconnects with closed and can realize to the control of drive cylinder 1 is realized the execution that nut 5 rotatablely moves or stops.
What deserves to be explained is, nut 5 quantity in this example are one, and this nut 5 is fixed on nut bracket 4.Nut 5 is enclosed within the periphery of leading screw, and it forms the screw nut driven pair.
Below introduce the working principle of this nut rotation-preventing mechanism.
When the control switch of closing double end hydraulic jack 1, double end hydraulic jack 1 stops the supply of driving force.Now, the power imported into by leading screw drives the nut rotation, and nut is without straight line motion, and corresponding nut is not acting also, there is no pulling force.
When the control switch of opening double end hydraulic jack 1, double end hydraulic jack 1 produces driving force, by clamp arm 2, this driving force is reached to clamp 3, the groove of clamp 3 starts against the periphery of nut 5, along with contacting of the periphery of groove and nut 5 is more and more tighter, the frictional force produced increases, until the power that leading screw imports into is owing to can not overcoming the frictional resistance produced by between clamp arm 2 and nut assembly, thereby nut 5 can't rotate, force the nut 5 can only straight line motion, so just rotatablely moving of leading screw is transformed into to nut 5 straight line motions, the driving torque of leading screw has converted the straight-line pulling force of nut 5 to.As long as friction reasonable in design, that raising clamp arm 2 and nut are 5, the pulling force that nut 5 produces can meet design requirement fully.
The performance parameter of the nut rotation-preventing mechanism of this preferred embodiment is as follows:
1, nut 5 is not more than 120mm/ minute along the leading screw translational velocity;
2, the pulling force stretchy that the leading screw moment of torsion produces is no less than the load of 500KN;
3, the oil pressure of double-head cylinder is no less than 12MPa; The stroke of oil cylinder is no less than 30mm.
Note, abovely described in conjunction with specific embodiments know-why of the present utility model.These are described is in order to explain principle of the present utility model, and can not be interpreted as by any way the restriction to the utility model protection domain.Explanation based on herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present utility model, within these modes all will fall into protection domain of the present utility model.
Claims (4)
1. the nut rotation-preventing mechanism of a screw nut driven pair is characterized in that: comprise fastening device and hydraulic system, hydraulic system drives fastening device to unclamp or clamp the nut (5) of screw nut driven pair; When hydraulic system drives fastening device to unclamp the nut (5) of screw nut driven pair, nut (5) can rotate, and when hydraulic system drives fastening device to clamp the nut (5) of screw nut driven pair, nut (5) can not rotate.
2. the nut rotation-preventing mechanism of a kind of screw nut driven pair according to claim 1, is characterized in that, described hydraulic system comprises double end hydraulic jack (1), and fastening device is connected to two output terminals of described double end hydraulic jack (1).
3. the nut rotation-preventing mechanism of a kind of screw nut driven pair according to claim 1, is characterized in that, also comprises nut bracket (4), and described fastening device comprises two groups of symmetrically arranged clamp assemblies; Every group of described clamp assembly comprises clamp arm (2) and clamp (3), the middle part of described clamp arm (2) and nut bracket (4) are hinged, an output terminal of one end of described clamp arm (2) and double end hydraulic jack (1) is hinged, and the other end and clamp (3) are hinged; When the output terminal of described double end hydraulic jack (1) stretches out, drive described clamp (3) turnbuckle (5) by described clamp arm (2), when the output terminal of described double end hydraulic jack (1) bounces back, drive described clamp (3) by described clamp arm (2) and unclamp nut (5).
4. the nut rotation-preventing mechanism of a kind of screw nut driven pair according to claim 3, is characterized in that, described clamp (3) is curved with the one side that nut (5) contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203370270U CN203363038U (en) | 2013-06-09 | 2013-06-09 | Nut anti-rotating mechanism of lead screw nut drive pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203370270U CN203363038U (en) | 2013-06-09 | 2013-06-09 | Nut anti-rotating mechanism of lead screw nut drive pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203363038U true CN203363038U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203370270U Expired - Fee Related CN203363038U (en) | 2013-06-09 | 2013-06-09 | Nut anti-rotating mechanism of lead screw nut drive pair |
Country Status (1)
| Country | Link |
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| CN (1) | CN203363038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551364A (en) * | 2020-05-07 | 2020-08-18 | 北京铁道工程机电技术研究所股份有限公司 | Lead screw running-in mechanism and running-in method |
-
2013
- 2013-06-09 CN CN2013203370270U patent/CN203363038U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551364A (en) * | 2020-05-07 | 2020-08-18 | 北京铁道工程机电技术研究所股份有限公司 | Lead screw running-in mechanism and running-in method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20170609 |