CN209740645U - Three-section inverted lead screw assembly - Google Patents
Three-section inverted lead screw assembly Download PDFInfo
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- CN209740645U CN209740645U CN201920124846.4U CN201920124846U CN209740645U CN 209740645 U CN209740645 U CN 209740645U CN 201920124846 U CN201920124846 U CN 201920124846U CN 209740645 U CN209740645 U CN 209740645U
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- lead screw
- wall
- nut
- screw rod
- cavity
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Abstract
The utility model discloses a three section flip-chip lead screw assembly, including little lead screw, cavity lead screw and connecting pipe, the upper end of little lead screw is connected with the motor, be provided with one-level nut and second grade nut on the upper end outer wall of cavity lead screw and on the upper end outer wall of connecting pipe respectively, little lead screw and cavity lead screw respectively with one-level nut and second grade nut threaded connection, be provided with a bearing in the one-level nut, the inner wall of bearing is fixed on the outer wall of cavity lead screw, be provided with the multichannel keyway on the inner wall of cavity lead screw, little lead screw end has set firmly the spline with the keyway adaptation. The utility model has the advantages of it is following and effect: under the restriction of the spline and the primary nut, the stroke of the small screw rod relative to the hollow screw rod is stabilized, so that the abrasion degree of the threads on the small screw rod and the hollow screw rod is reduced, and the durability of the small screw rod and the hollow screw rod is better.
Description
Technical Field
The utility model relates to a jacking equipment technical field, in particular to three section flip-chip lead screw assembly.
Background
Electric lift stand by wide application in fields such as house, medical treatment, the lift stand on the prior art, at the in-process that rises, takes place the slope easily between the lead screw and causes the screw thread on the lead screw to take place wearing and tearing, after long-term the use, can further increase the problem of slope.
SUMMERY OF THE UTILITY MODEL
the utility model aims at providing a less three section flip-chip lead screw assembly of lead screw wearing and tearing.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a three section flip-chip lead screw assembly, including little lead screw, cavity lead screw and connecting pipe, the upper end of little lead screw is connected with the motor, be provided with one-level nut and second grade nut on the upper end outer wall of cavity lead screw and on the upper end outer wall of connecting pipe respectively, little lead screw and cavity lead screw respectively with one-level nut and second grade nut threaded connection, be provided with a bearing in the one-level nut, the inner wall of bearing is fixed on the outer wall of cavity lead screw, be provided with the multichannel keyway on the inner wall of cavity lead screw, little lead screw end sets firmly the spline with the keyway adaptation.
Through adopting above-mentioned technical scheme, under the restriction of spline and one-level nut, the stroke of little lead screw relative cavity lead screw is stabilized to the degree of wear of the screw thread on little lead screw and the cavity lead screw has been reduced, makes both durability better.
Further setting the following steps: the one-level nut comprises a fixed table, a bottom plate is fixedly arranged at the lower end of the fixed table through a screw, and a cylindrical groove for embedding the bearing is formed in the bottom of the fixed table.
Through adopting above-mentioned technical scheme, the bearing is fixed in a certain position with the cooperation of fixed station and bottom plate, has guaranteed the stability of bearing when rotating.
Further setting the following steps: a coupling is arranged between the upper end of the small screw rod and the motor.
Through adopting above-mentioned technical scheme, the upper end of little lead screw and the axis of rotation of motor can be stabilized to the shaft coupling to make the motor drive little lead screw and rotate more stably.
Further setting the following steps: the thread pitch ratio of the small screw rod to the hollow screw rod is 1:2 to 1: 2.5.
By adopting the technical scheme, the thread space ratio of the small screw rod to the hollow screw rod is controlled to be 1:2 to 1:2.5, so that the lifting upright post can keep the lifting stability when lifted.
Drawings
FIG. 1 is a schematic view of a three-section inverted lead screw assembly of the present invention;
FIG. 2 is a perspective view of the stationary platen;
Fig. 3 is a perspective view of the bottom of the stationary platen.
In the figure: 1. a small screw rod; 2. a hollow lead screw; 3. a connecting pipe; 4. a motor; 5. a primary nut; 6. a secondary nut; 7. a bearing; 8. a keyway; 9. a spline; 10. a fixed table; 11. a base plate; 12. a cylindrical groove; 13. a coupling is provided.
Detailed Description
the present invention will be described in further detail with reference to fig. 1 to 3.
The utility model provides a three section flip-chip lead screw assembly, includes little lead screw 1, cavity lead screw 2 and connecting pipe 3, and little lead screw 1 overlaps in cavity lead screw 2, and cavity lead screw 2 overlaps in connecting pipe 3.
The upper end of the small screw rod 1 is connected with a motor 4, so that the small screw rod 1 is driven to rotate through the motor 4. A coupling 13 is arranged between the small screw rod 1 and the motor 4, so that the small screw rod 1 and the rotating shaft of the motor 4 are used for relieving the abrasion of the small screw rod 1 caused by the deviation caused by inaccurate manufacturing and installation, deformation or thermal expansion in work and the like.
The outer wall of the upper end of the hollow screw rod 2 is provided with a first-stage nut 5, and the outer wall of the upper end of the connecting pipe 3 is provided with a second-stage nut 6. The small screw rod 1 is connected with the first-stage nut 5 through threads, and the hollow screw rod 2 is connected with the second-stage nut 6 through threads. The first-level nut 5 comprises a square fixing table 10, a cylindrical groove 12 for embedding the bearing 7 is formed in the bottom of the fixing table 10, the bearing 7 is arranged in the cylindrical groove 12, a bottom plate 11 is fixedly arranged at the lower end of the fixing table 10 through a screw, and the bearing 7 is limited in the cylindrical groove 12 by the bottom plate 11. The inner wall of the bearing 7 is fixed on the outer wall of the hollow screw rod 2, a plurality of key grooves 8 are uniformly formed in the inner wall of the hollow screw rod 2, and a spline 9 matched with the key grooves 8 is fixedly arranged at the tail end of the small screw rod 1.
The side wall of the fixing table 10 can be provided with a horizontal screw which rotates inwards to be fixed on the outer wall of the bearing 7, so that the rotation of the bearing 7 is more stable, and the abrasion caused by the rotation is reduced due to the inclination degree between the hollow screw rod 2 and the small screw rod 1.
The thread pitch ratio of the small screw mandrel 1 to the hollow screw mandrel 2 is 1:2 to 1:2.5, controlling the thread pitch ratio to be 1:2 to 1:2.5, the lifting upright post can keep the stability when lifting.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a three section flip-chip lead screw assembly which characterized in that: including little lead screw, cavity lead screw and connecting pipe, the upper end of little lead screw is connected with the motor, be provided with one-level nut and second grade nut on the upper end outer wall of cavity lead screw and the upper end outer wall of connecting pipe respectively, little lead screw and cavity lead screw respectively with one-level nut and second grade nut threaded connection, be provided with a bearing in the one-level nut, the inner wall of bearing is fixed on the outer wall of cavity lead screw, be provided with the multichannel keyway on the inner wall of cavity lead screw, little lead screw end sets firmly the spline with the keyway adaptation.
2. the three-segment flip lead screw assembly of claim 1, wherein: the one-level nut comprises a fixed table, a bottom plate is fixedly arranged at the lower end of the fixed table through a screw, and a cylindrical groove for embedding the bearing is formed in the bottom of the fixed table.
3. The three-segment flip lead screw assembly of claim 1, wherein: a coupling is arranged between the upper end of the small screw rod and the motor.
4. The three-segment flip lead screw assembly of claim 1, wherein: the thread pitch ratio of the small screw rod to the hollow screw rod is 1:2 to 1: 2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920124846.4U CN209740645U (en) | 2019-01-24 | 2019-01-24 | Three-section inverted lead screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920124846.4U CN209740645U (en) | 2019-01-24 | 2019-01-24 | Three-section inverted lead screw assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209740645U true CN209740645U (en) | 2019-12-06 |
Family
ID=68705338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920124846.4U Active CN209740645U (en) | 2019-01-24 | 2019-01-24 | Three-section inverted lead screw assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209740645U (en) |
-
2019
- 2019-01-24 CN CN201920124846.4U patent/CN209740645U/en active Active
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