CN202301806U - Spring pre-tightening double-nut lead-screw driving device - Google Patents
Spring pre-tightening double-nut lead-screw driving device Download PDFInfo
- Publication number
- CN202301806U CN202301806U CN2011203611545U CN201120361154U CN202301806U CN 202301806 U CN202301806 U CN 202301806U CN 2011203611545 U CN2011203611545 U CN 2011203611545U CN 201120361154 U CN201120361154 U CN 201120361154U CN 202301806 U CN202301806 U CN 202301806U
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- Prior art keywords
- nut
- mother
- seat
- nut seat
- screw
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- Expired - Fee Related
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Abstract
The utility model relates to a spring pre-tightening double-nut lead-screw driving device for a planar type milling machine, a single-sided milling machine and a double-sided milling machine. The device comprises a nut seat (1), a lead screw (3), a mother nut (4) and six circumferentially uniformly distributed inner hexagon screws (2). The small-head cylindrical part of the mother nut (4) is arranged in a hole of the nut seat (1), and the mother nut (4) is fixedly connected to the nut seat (1) by the inner hexagon screws (2). The lead screw (3) is connected with the mother nut (4) through a trapezoidal-tooth driving screw. A secondary nut (6) is also arranged on the lead screw (3), and is connected with the lead screw (3) through a trapezoidal-tooth driving screw. A compression spring (5) is arranged between the mother nut (4) and the secondary nut (6). The secondary nut (6) is connected with the nut seat (1) through a key (7). The device has a simple structure, automatic gap adjustment capability, high driving accuracy, safety, reliability and long service life.
Description
Technical field
The utility model relates to mechanical transmission, specifically a kind of spring pretension double nut spindle gear that is used for planomiller, single face milling machine, double sides milling machine.
Background technique
The spindle gear that existing planomiller, single face milling machine, double sides milling machine are adopted is to adopt single nut to carry out transmission, because the single nut drive gap is difficult to eliminate, axial motion is bigger, directly causes machining accuracy to descend, and maintenance load is big, and cost is high.
The model utility content
The purpose of the utility model just provides a kind of simple in structure, automatic gap adjusting, and transmission accuracy is high, and is safe and reliable, the spring pretension double nut spindle gear of long service life.
For achieving the above object; The utility model spring pretension double nut spindle gear comprises nut seat, screw mandrel, mother nut and six socket head screws that circumferentially are uniformly distributed with; Microcephaly's column part of mother nut is packed in the hole of nut seat; And with socket head screw mother nut is fastenedly connected on nut seat, screw mandrel is connected through the stepped tooth motion thread with mother nut, and the secondary nut that is connected through the stepped tooth motion thread also is housed on the screw mandrel; Between mother nut and secondary nut, pressure spring is housed, secondary nut is connected with nut seat through key; The internal diameter of pressure spring should be greater than the external diameter of screw mandrel, and the external diameter of pressure spring should be less than the diameter of bore of nut seat; Mother nut stretches between the endoporus of excircle part and nut seat of nut seat and adopts transition fit.
The utility model is owing to be equipped with mother nut and secondary nut on screw mandrel; Pressure spring is installed between mother nut and the secondary nut, and during installation, but elastic force pretension mother nut that pressure spring produced and secondary nut are on screw mandrel; Thereby reach the thread pitch between automatic elimination mother nut and secondary nut and the screw mandrel; Transmission accuracy is high, and is safe and reliable, long service life.
Description of drawings
Fig. 1 is the overall structure schematic representation of the utility model.
Embodiment
Shown in Fig. 1 is an embodiment of the utility model; The utility model spring pretension double nut spindle gear comprises nut seat 1, screw mandrel 3, mother nut 4 and six socket head screws that circumferentially are uniformly distributed with 2; Microcephaly's column part of mother nut 4 is packed in the hole of nut seat 1; And with socket head screw 2 mother nut 4 is fastenedly connected on nut seat 1, screw mandrel 3 is connected through the stepped tooth motion thread with mother nut 4, and the secondary nut 6 that is connected through the stepped tooth motion thread also is housed on the screw mandrel 3; Between mother nut 4 and secondary nut 6, pressure spring 5 is housed; But elastic force pretension mother nut 4 that pressure spring 5 is produced and secondary nut 6 can be eliminated the thread pitch between mother nut 4 and secondary nut 6 and the screw mandrel 3 automatically on screw mandrel 3, and secondary nut 6 is connected with nut seat 1 through key 7.The internal diameter of pressure spring 5 should be greater than the external diameter of screw mandrel 3, and the external diameter of pressure spring 5 should be less than the diameter of bore of nut seat 1, so that pressure spring 5 is installed.Mother nut 4 stretches between the endoporus of excircle part and nut seat 1 of nut seat 1 and adopts transition fit.
Claims (3)
1. spring pretension double nut spindle gear; Comprise nut seat (1), screw mandrel (3), mother nut (4) and six socket head screws that circumferentially are uniformly distributed with (2); Microcephaly's column part of mother nut (4) is packed in the hole of nut seat (1); And with socket head screw (2) mother nut (4) is fastenedly connected on nut seat (1), screw mandrel (3) is connected through the stepped tooth motion thread with mother nut (4), it is characterized in that: the secondary nut (6) that is connected through the stepped tooth motion thread also is housed on the screw mandrel (3); Between mother nut (4) and secondary nut (6), pressure spring (5) is housed, secondary nut (6) is connected with nut seat (1) through key (7).
2. spring pretension double nut spindle gear according to claim 1 is characterized in that: the internal diameter of said pressure spring (5) should be greater than the external diameter of screw mandrel (3), and the external diameter of pressure spring (5) should be less than the diameter of bore of nut seat (1).
3. spring pretension double nut spindle gear according to claim 1 is characterized in that: said mother nut (4) stretches between the endoporus of excircle part and nut seat (1) of nut seat (1) and adopts transition fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203611545U CN202301806U (en) | 2011-09-23 | 2011-09-23 | Spring pre-tightening double-nut lead-screw driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203611545U CN202301806U (en) | 2011-09-23 | 2011-09-23 | Spring pre-tightening double-nut lead-screw driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301806U true CN202301806U (en) | 2012-07-04 |
Family
ID=46370710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203611545U Expired - Fee Related CN202301806U (en) | 2011-09-23 | 2011-09-23 | Spring pre-tightening double-nut lead-screw driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202301806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107285247A (en) * | 2017-08-23 | 2017-10-24 | 上海联影医疗科技有限公司 | Lowering or hoisting gear and C arm machine |
-
2011
- 2011-09-23 CN CN2011203611545U patent/CN202301806U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107285247A (en) * | 2017-08-23 | 2017-10-24 | 上海联影医疗科技有限公司 | Lowering or hoisting gear and C arm machine |
| US10717635B2 (en) | 2017-08-23 | 2020-07-21 | Shanghai United Imaging Healthcare Co., Ltd. | Anti-fall mechanism for lifting equipment |
| US11247882B2 (en) | 2017-08-23 | 2022-02-15 | Shanghai United Imaging Healthcare Co., Ltd. | Anti-fall mechanism for lifting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20130923 |