CN218494124U - Automatic eliminating device for thread clearance - Google Patents
Automatic eliminating device for thread clearance Download PDFInfo
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- CN218494124U CN218494124U CN202220695156.6U CN202220695156U CN218494124U CN 218494124 U CN218494124 U CN 218494124U CN 202220695156 U CN202220695156 U CN 202220695156U CN 218494124 U CN218494124 U CN 218494124U
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- nut
- screw
- cylinder body
- screw rod
- thread clearance
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Abstract
The utility model discloses an automatic eliminating device of screw thread clearance, the electric iron comprises a screw rod, the outside threaded connection of screw rod has nut and screw cylinder body, the nut hole is equipped with the screw cylinder body, screw cylinder body and nut upper end all are equipped with the feather key through the feather key groove. The threaded cylinder is characterized in that an annular sealing cavity is formed in the threaded cylinder, a tension rod is arranged in the annular sealing cavity, sealing rings are arranged on the outer circle and the inner hole of the tension rod, a pneumatic connector and a pipe fitting are arranged at the right end of the threaded cylinder, and a pressure reducing valve is communicated with the upper ends of the pneumatic connector and the pipe fitting. The utility model relates to a combined material equipment field, this thread clearance automatic elimination device nut back-and-forth movement is accurate enough when having solved screw rod just reverse rotation stable, comparatively receive the problem that the thread clearance influences.
Description
Technical Field
The utility model relates to a combined material equipment field specifically is a thread clearance automatic elimination device.
Background
In the using process of equipment such as a compound machine/a film coating machine and the like, the gap between the heating roller and the heating roller needs to be adjusted, the gap adjusting precision is in a micron order, the gap adjusting mechanism adopts a screw rod to drive a wedge block (nut) to adjust the gap between the heating roller, and therefore the key position of the gap adjusting is the matching of the screw rod and the wedge block (nut). In the machining process, the screw and the nut are independently machined, a certain gap is required to be reserved in threads of the screw and the nut to ensure that the screw and the nut are smoothly screwed, and the screw and the nut are prevented from being blocked due to local high points or unsmooth matching. A screw in a gap adjusting mechanism of a compound machine/film coating machine drives a wedge block (nut) to move forward and backward through forward and reverse rotation so as to control the gap value between heating rollers, the screw rotates forward for 1 circle in the using process, the wedge block (nut) moves forward for an L1 distance, and the gap of the heating rollers is increased by L1/n (n is an inclination); when the screw rotates reversely for 1 circle, the wedge block (nut) moves backwards for a distance of L1-L2 (L2 is the thread clearance between the nut and the screw), and the clearance of the heating roller is reduced (L1-L2)/n (n is the inclination); in the process, the angular position of the screw is unchanged after 1 forward transmission and 1 reverse rotation, and the position of the wedge block (nut) is changed by L2/n, which seriously influences the gap adjustment precision.
The front and back movement of the nut is not accurate and stable enough when the existing screw rotates forwards and backwards, and is influenced by the thread clearance.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides an automatic remove device in thread clearance has solved the problem that the nut back-and-forth movement is accurate enough when the screw rod is just reversing the rotation stable, comparatively receive the thread clearance influence.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides an automatic remove device in screw thread clearance, includes the screw rod, the outside threaded connection of screw rod has nut and screw cylinder body, the nut hole is equipped with screw cylinder body, screw cylinder body and nut upper end all are equipped with the feather key through the feather key groove.
Preferably, an annular sealing cavity is arranged inside the threaded cylinder body, and a tension rod is arranged in the annular sealing cavity.
Preferably, the outer circle and the inner hole of the tension rod are provided with sealing rings, the right end of the threaded cylinder body is provided with a pneumatic connector and a pipe fitting, and the upper ends of the pneumatic connector and the pipe fitting are communicated with a pressure reducing valve.
Advantageous effects
The utility model provides a thread clearance automatic elimination device. The method has the following beneficial effects:
(1) The automatic thread clearance eliminating device is characterized in that a pressure reducing valve is started to form a closed space through a pneumatic connector and a pipe fitting to an annular sealing cavity of a threaded cylinder body and a tension rod to be filled with compressed air, the tension rod moves towards the right end of the threaded cylinder body until the tension rod is contacted with a nut under the driving of the compressed air, the threaded cylinder body 4 and the nut 2 move towards two ends of a screw rod 1 respectively under the driving of a tension rod 3 until the threaded cylinder body stops, the left thread in the threaded cylinder body is contacted with the screw rod 1, the right thread in the nut 2 is contacted with the screw rod 1, and when the threaded cylinder body 4 and the nut 2 are regarded as a whole, the whole nut is contacted with the left thread surface and the right thread surface of the screw rod 1, namely the whole nut is not in thread clearance with the screw rod 1.
(2) This automatic remove device in thread clearance receives external force maximum when nut 2 removes in the use: f; the pressure of the pressure reducing valve 8 is: p; sectional area of annular seal cavity of the threaded cylinder 4: and s. When the screw rod is used, the thread clearance between the nut 2 and the screw rod 1 can be eliminated when the air pressure p of the pressure reducing valve 8 is larger than F/s, so that the front and back movement of the nut 2 is accurate and stable when the screw rod 1 rotates forwards and backwards, and the influence of the thread clearance is avoided.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic view of the screw-in nut of the present invention;
fig. 3 is a schematic view of the contact structure between the tension rod and the nut of the present invention;
FIG. 4 is a schematic view of the structure of the threaded cylinder, the tension rod and the nut of the present invention after installation;
fig. 5 is a schematic view of the structure of the screw of the present invention continuously screwing after passing through the threaded cylinder in advance.
In the figure: 1. a screw; 2. a nut; 3. a tension rod; 4. a threaded cylinder body; 5. a sliding key; 6. a seal ring; 7. pneumatic joints and pipe fittings; 8. a pressure reducing valve.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
the first embodiment is as follows:
the utility model provides an automatic remove device in screw thread clearance, including screw rod 1, 1 outside threaded connection of screw rod has nut 2 and screw cylinder body 4, 2 holes of nut are equipped with screw cylinder body 4, 2 upper ends of screw cylinder body 4 and nut all are equipped with feather key 5 through the feather key groove, 4 inside annular seal chambeies that are equipped with of screw cylinder body, be equipped with tight pole 3 that rises in the annular seal intracavity, 3 excircles of tight pole that rises all are equipped with sealing washer 6 with the hole, 4 right-hand members of screw cylinder body are equipped with pneumatic joint and pipe fitting 7, pneumatic joint and 7 upper ends of pipe fitting intercommunication have relief pressure valve 8.
When the device works, the threaded cylinder body 4, the tension rod 3, the nut 2 and the like are installed according to a diagram, at the moment, the screw rod 1 penetrates through the threaded cylinder body 4 in advance and then is screwed in continuously, when the end part of the screw rod 1 is close to the nut 2, the axial distance between the threaded cylinder body 4 and the nut 2 is adjusted to enable the distance to be integral multiples of the screw pitch, the screw rod 1 is screwed in the nut 2, then the pneumatic connector, the pipe fitting 7 and the pressure reducing valve 8 are installed in place, the pressure reducing valve 8 is started to form a closed space for filling compressed air into an annular sealing cavity of the threaded cylinder body 4 and the tension rod 3 through the pneumatic connector and the pipe fitting 7, the tension rod 3 moves towards the right end of the threaded cylinder body 4 under the driving of the compressed air until the tension rod is contacted with the nut 2, at the moment, the threaded cylinder body 4 and the nut 2 respectively move towards the two ends of the screw rod 1 under the driving of the tension rod 3 until the tension rod stops, at the moment, the left thread in the threaded cylinder body 4 is contacted with the screw rod 1, the right thread in the nut 2 is contacted with the screw rod 1, at the moment, when the threaded cylinder body 4 and the nut 2 are considered as a whole, the whole, namely, the whole nut is not in the moment, the whole nut is contacted with the external force is maximally: f; the pressure of the pressure reducing valve 8 is: p; sectional area of annular seal cavity of the threaded cylinder 4: and s. When the screw rod 1 is used, the thread clearance between the nut 2 and the screw rod 1 can be eliminated when the air pressure p of the pressure reducing valve 8 is larger than F/s, so that the forward and backward movement of the nut 2 is accurate and stable when the screw rod 1 rotates forwards and backwards, and the influence of the thread clearance is avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Claims (3)
1. The utility model provides a thread clearance automatic elimination device, includes screw rod (1), its characterized in that: screw rod (1) outside threaded connection has nut (2) and screw cylinder body (4), nut (2) hole is equipped with screw cylinder body (4), screw cylinder body (4) and nut (2) upper end all are equipped with feather key (5) through the feather key groove.
2. The automatic thread backlash elimination apparatus according to claim 1, wherein: an annular sealing cavity is formed in the threaded cylinder body (4), and a tension rod (3) is arranged in the annular sealing cavity.
3. The automatic thread backlash elimination device according to claim 2, wherein: the outer circle and the inner hole of the tension rod (3) are provided with sealing rings (6), the right end of the threaded cylinder body (4) is provided with a pneumatic connector and a pipe fitting (7), and the upper ends of the pneumatic connector and the pipe fitting (7) are communicated with a pressure reducing valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220695156.6U CN218494124U (en) | 2022-03-27 | 2022-03-27 | Automatic eliminating device for thread clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220695156.6U CN218494124U (en) | 2022-03-27 | 2022-03-27 | Automatic eliminating device for thread clearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218494124U true CN218494124U (en) | 2023-02-17 |
Family
ID=85183123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220695156.6U Active CN218494124U (en) | 2022-03-27 | 2022-03-27 | Automatic eliminating device for thread clearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218494124U (en) |
-
2022
- 2022-03-27 CN CN202220695156.6U patent/CN218494124U/en active Active
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