CN219404090U - Nut pre-tightening mechanism - Google Patents
Nut pre-tightening mechanism Download PDFInfo
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- CN219404090U CN219404090U CN202320337065.XU CN202320337065U CN219404090U CN 219404090 U CN219404090 U CN 219404090U CN 202320337065 U CN202320337065 U CN 202320337065U CN 219404090 U CN219404090 U CN 219404090U
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- mounting sleeve
- tightening
- nut
- tightening mechanism
- installation cover
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Abstract
The utility model belongs to the technical field of nut pre-tightening structure design, and particularly relates to a nut pre-tightening mechanism, which comprises an outer mounting sleeve, wherein the upper end of the inner side of the outer mounting sleeve is rotationally connected with an inner mounting sleeve, the inner side of the inner mounting sleeve is axially and slidably connected with a pre-tightening shaft, the lower end of the pre-tightening shaft penetrates through the outer mounting sleeve and is connected with a pre-tightening head, a nut clamping structure is arranged on the pre-tightening head, a spring is arranged between the pre-tightening shaft and the inner mounting sleeve, the upper end of the outer mounting sleeve is connected with a rotary driving assembly, and the rotary driving assembly is connected with the inner mounting sleeve. The nut pre-tightening mechanism can automatically pre-tighten the nuts on the screw rod, is convenient to realize automation, effectively reduces the labor intensity of workers and improves the working efficiency.
Description
Technical Field
The utility model relates to a nut pre-tightening mechanism, and belongs to the technical field of nut pre-tightening structure design.
Background
The special vehicle axle hub brake drum is assembled and connected together by stud bolts and nuts, and the traditional assembly operation generally comprises the following steps: firstly, overlapping hub brake drums together, then placing the hub brake drums on the ground, pressing a plurality of bolt heads on the hub brake drums, then manually grabbing nuts and pre-tightening the nuts on the bolts, finally tightening the nuts by using a handheld air cannon, and repeating the actions for the last time until all the nuts are completely assembled.
In the traditional operation mode, the pre-tightening of the nut is performed manually by workers, the automation degree is low, the labor intensity of the workers is high, and the operation efficiency is low.
Disclosure of Invention
According to the defects in the prior art, the technical problems to be solved by the utility model are as follows: provided is a nut pre-tightening mechanism capable of realizing automation of nut pre-tightening.
The nut pre-tightening mechanism comprises an outer mounting sleeve, an inner mounting sleeve is rotatably connected to the upper end of the inner side of the outer mounting sleeve, a pre-tightening shaft is axially and slidably connected to the inner side of the inner mounting sleeve, the lower end of the pre-tightening shaft penetrates through the outer mounting sleeve and is connected with a pre-tightening head, a nut clamping structure is arranged on the pre-tightening head, a spring is arranged between the pre-tightening shaft and the inner mounting sleeve, the upper end of the outer mounting sleeve is connected with a rotary driving assembly, and the rotary driving assembly is connected with the inner mounting sleeve.
Working principle and process:
when the screw rod is used, the outer mounting sleeve is connected with the movable part of the linear reciprocating motion assembly, the nut is clamped by the nut clamping structure, then the linear reciprocating motion assembly acts to drive the screw rod to move, the nut is propped against the screw rod, then the linear reciprocating motion assembly continues to act, at the moment, the pre-tightening shaft and the pre-tightening head do not move under the limiting effect of the screw rod, the outer mounting sleeve continues to move, the inner mounting sleeve is driven to continue to move to compress the spring, then the rotary driving assembly acts to drive the inner mounting sleeve to rotate, so that the nut is driven to rotate by the pre-tightening shaft and the pre-tightening head, and the nut is pre-tightened on the screw rod under the resetting effect of the spring, and then the linear reciprocating motion assembly acts to drive the screw rod to reset.
Compared with the prior art, the utility model has the following beneficial effects:
the nut pre-tightening mechanism can automatically pre-tighten the nuts on the screw rod, is convenient to realize automation, effectively reduces the labor intensity of workers and improves the working efficiency.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is an enlarged view at a in FIG. 1;
fig. 3 is an enlarged view at b in fig. 1.
In the figure: 1. a servo motor; 2. a speed reducer; 3. a lower mounting sleeve; 4. a lower bearing; 5. pre-tightening the shaft; 6. pre-tightening the head; 7. a flat key; 8. an inner mounting sleeve; 9. a mounting sleeve is arranged on the upper part; 10. an upper bearing; 11. an upper mounting groove; 12. a chute; 13. a slide block; 14. a middle bearing; 15. a spring; 16. a lower mounting groove; 17. a pin shaft; 18. a screw; 19. a magnet; 20. and a nut clamping groove.
Detailed Description
Embodiments of the utility model are further described below with reference to the accompanying drawings:
example 1:
as shown in fig. 1 to 3, the nut pre-tightening mechanism of the utility model comprises an outer mounting sleeve, an inner mounting sleeve 8 is rotatably connected to the upper end of the inner side of the outer mounting sleeve, a pre-tightening shaft 5 is axially and slidably connected to the inner side of the inner mounting sleeve 8, the lower end of the pre-tightening shaft 5 penetrates through the outer mounting sleeve and is connected with a pre-tightening head 6, a nut clamping structure is arranged on the pre-tightening head 6, a spring 15 is arranged between the pre-tightening shaft 5 and the inner mounting sleeve 8, a rotary driving assembly is connected to the upper end of the outer mounting sleeve, and the rotary driving assembly is connected with the inner mounting sleeve 8.
Working principle and process:
when the nut clamping device is used, the outer mounting sleeve is connected with the movable part of the linear reciprocating motion assembly, the nut is clamped by the nut clamping structure, then the linear reciprocating motion assembly acts to drive the nut to move, so that the nut props against the screw, then the linear reciprocating motion assembly continues to act, at the moment, the pre-tightening shaft 5 and the pre-tightening head 6 do not move under the limiting effect of the screw, the outer mounting sleeve continues to move, the inner mounting sleeve 8 is driven to continue to move to compress the spring 15, then the driving assembly acts to drive the inner mounting sleeve 8 to rotate, and accordingly the nut is driven to rotate by the pre-tightening shaft 5 and the pre-tightening head 6, the nut is pre-tightened on the screw under the resetting effect of the spring 15, and then the linear reciprocating motion assembly acts to drive the nut to reset.
Compared with the prior art, the utility model has the following beneficial effects:
the nut pre-tightening mechanism can automatically pre-tighten the nuts on the screw rod, is convenient to realize automation, effectively reduces the labor intensity of workers and improves the working efficiency.
Example 2:
as shown in fig. 1 to 3, the nut pre-tightening mechanism of the utility model comprises an outer mounting sleeve, an inner mounting sleeve 8 is rotatably connected to the upper end of the inner side of the outer mounting sleeve, a pre-tightening shaft 5 is axially and slidably connected to the inner side of the inner mounting sleeve 8, the lower end of the pre-tightening shaft 5 penetrates through the outer mounting sleeve and is connected with a pre-tightening head 6, a nut clamping structure is arranged on the pre-tightening head 6, a spring 15 is arranged between the pre-tightening shaft 5 and the inner mounting sleeve 8, a rotary driving assembly is connected to the upper end of the outer mounting sleeve, and the rotary driving assembly is connected with the inner mounting sleeve 8.
In this embodiment:
the upper bearing 10 and the middle bearing 14 are arranged in the outer mounting sleeve, and the inner mounting sleeve 8 is arranged between the upper bearing 10 and the middle bearing 14, so that the inner mounting sleeve 8 rotates more smoothly; the outer mounting sleeve comprises an upper mounting sleeve 9 and a lower mounting sleeve 3, and the upper mounting sleeve 9 and the lower mounting sleeve 3 can be detached, so that the replacement and maintenance of the upper bearing 10, the middle bearing 14 and the spring 15 are facilitated; the bottom of the inner mounting sleeve 8 is provided with an upper mounting groove 11, the top of the pre-tightening shaft 5 is provided with a lower mounting groove 16, and a spring 15 is arranged between the upper mounting groove 11 and the lower mounting groove 16, so that the structure is simple, and the replacement and maintenance of the spring 15 are convenient; the rotary driving assembly comprises the reducer 2 connected to the upper end of the outer mounting sleeve, the reducer 2 is connected with the servo motor 1, the output shaft of the reducer 2 is connected with the inner mounting sleeve 8 through the flat key 7, the number of pre-tightening turns of the nut can be set, and the rotary driving assembly is stable in operation, high in accuracy and convenient to control; the pre-tightening shaft 5 is connected with the sliding block 13, the inner side of the inner mounting sleeve 8 is provided with the sliding groove 12 matched with the sliding block 13, and the pre-tightening shaft has a simple structure and a good sliding effect; the lower end of the outer mounting sleeve is provided with the lower bearing 4 corresponding to the pre-tightening shaft 5, so that sliding friction between the pre-tightening shaft 5 and the outer mounting sleeve can be prevented, and the action operation is smoother; the nut clamping structure comprises a nut clamping groove 20 arranged at the bottom of the pre-tightening head 6, wherein the pre-tightening head 6 is connected with a magnet 19 corresponding to the nut clamping groove 20, the nut is clamped in the nut clamping groove 20, the magnet 19 can absorb the nut, and meanwhile, the nut can be automatically separated from the magnet 19 when a certain tensile force is applied to the nut, so that automatic operation is convenient to realize; the magnet 19 is connected with the pre-tightening head 6 through the screw 18, so that the magnet 19 is convenient to replace and maintain; the pre-tightening head 6 is fixedly connected with the pre-tightening shaft 5 through a pin shaft, so that the pre-tightening head 6 can be replaced and maintained conveniently.
Working principle and process:
when the screw nut tightening device is used, the upper mounting sleeve 9 and the lower mounting sleeve 3 are connected with movable parts of the linear reciprocating motion assembly, the nut is clamped in the nut clamping groove 20, the nut is sucked through the magnet 19, then the linear reciprocating motion assembly acts to drive the screw rod to move, the nut is enabled to prop against the screw rod, then the linear reciprocating motion assembly continues to act, at the moment, the pre-tightening shaft 5 and the pre-tightening head 6 do not move under the limiting effect of the screw rod, the outer mounting sleeve continues to move, the inner mounting sleeve 8 is driven to continue to move to compress the spring 15, then the servo motor 1 acts to drive the inner mounting sleeve 8 to rotate under the effect of the speed reducer 2, so that the nut is driven to rotate through the pre-tightening shaft 5 and the pre-tightening head 6, and the nut is pre-tightened on the screw rod under the resetting effect of the spring 15, and then the linear reciprocating motion assembly acts to drive the screw rod to reset.
Compared with the prior art, the utility model has the following beneficial effects:
the nut pre-tightening mechanism can automatically pre-tighten the nuts on the screw rod, is convenient to realize automation, effectively reduces the labor intensity of workers and improves the working efficiency.
Specifically described are: in the description of the present utility model, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and do not require that the present utility model must be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
Claims (9)
1. A nut pre-tightening mechanism, characterized in that: including outer installation cover, the inboard upper end rotation of outer installation cover is connected with interior installation cover (8), the inboard of interior installation cover (8) is followed axial sliding connection and is had pretension axle (5), the lower extreme of pretension axle (5) runs through outer installation cover and is connected with pretension head (6), be equipped with nut clamping structure on pretension head (6), install spring (15) between pretension axle (5) and interior installation cover (8), the upper end of outer installation cover is connected with rotary drive subassembly, rotary drive subassembly and interior installation cover (8) hookup.
2. The nut pre-tightening mechanism as defined in claim 1, further characterized by: the outer mounting sleeve is internally provided with an upper bearing (10) and a middle bearing (14), and the inner mounting sleeve (8) is arranged between the upper bearing (10) and the middle bearing (14).
3. The nut pre-tightening mechanism as defined in claim 2, wherein: the outer mounting sleeve comprises an upper mounting sleeve (9) and a lower mounting sleeve (3).
4. A nut pre-tightening mechanism as defined in claim 3, further characterized by: the bottom of the inner mounting sleeve (8) is provided with an upper mounting groove (11), the top of the pre-tightening shaft (5) is provided with a lower mounting groove (16), and the spring (15) is mounted between the upper mounting groove (11) and the lower mounting groove (16).
5. The nut pre-tightening mechanism as defined in claim 1, further characterized by: the rotary driving assembly comprises a speed reducer (2) connected to the upper end of the outer mounting sleeve, the speed reducer (2) is connected with a servo motor (1), and an output shaft of the speed reducer (2) is connected with the inner mounting sleeve (8) through a flat key (7).
6. The nut pre-tightening mechanism as defined in claim 1, further characterized by: the pre-tightening shaft (5) is connected with a sliding block (13), and the inner side of the inner mounting sleeve (8) is provided with a sliding groove (12) matched with the sliding block (13).
7. The nut pre-tightening mechanism as defined in claim 1, further characterized by: the lower end of the outer mounting sleeve is provided with a lower bearing (4) corresponding to the pre-tightening shaft (5).
8. The nut pre-tightening mechanism according to any one of claims 1 to 7, characterized in that: the nut clamping structure comprises a nut clamping groove (20) arranged at the bottom of the pre-tightening head (6), and a magnet (19) corresponding to the nut clamping groove (20) is connected to the pre-tightening head (6).
9. The nut pre-tightening mechanism of claim, wherein: the magnet (19) is connected with the pre-tightening head (6) through a screw (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320337065.XU CN219404090U (en) | 2023-02-28 | 2023-02-28 | Nut pre-tightening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320337065.XU CN219404090U (en) | 2023-02-28 | 2023-02-28 | Nut pre-tightening mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219404090U true CN219404090U (en) | 2023-07-25 |
Family
ID=87229742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320337065.XU Active CN219404090U (en) | 2023-02-28 | 2023-02-28 | Nut pre-tightening mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219404090U (en) |
-
2023
- 2023-02-28 CN CN202320337065.XU patent/CN219404090U/en active Active
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