CN220248840U

CN220248840U - Screw pre-tightening structure

Info

Publication number: CN220248840U
Application number: CN202321918600.7U
Authority: CN
Inventors: 张建松
Original assignee: Tianjin Gusheng Technology Co ltd
Current assignee: Tianjin Gusheng Technology Co ltd
Priority date: 2023-07-20
Filing date: 2023-07-20
Publication date: 2023-12-26
Anticipated expiration: 2033-07-20

Abstract

The utility model discloses a screw pre-tightening structure, which comprises a base, wherein the upper surface of the base is slidably connected with a left fixed block, the right surface of the left fixed block is rotationally connected with a threaded sleeve, a pre-tightening device comprises a connecting shell, a pull ring, a hook, a spring, a draw hook groove and a threaded column, the right fixed block is fixedly connected on the base, the right surface of the right fixed block is fixedly connected with a motor, the outer surface of the hook is fixedly connected with a screw fixed block, the outer surface of the screw fixed block is fixedly connected with a screw, the outer surface of the screw is in threaded connection with a threaded slider, the threaded sleeve and the threaded column in the pre-tightening device are matched to provide a pre-tightening force for the screw to stably operate when the length of the screw is deformed, and when the screw is required to be replaced due to excessive deformation and abrasion, the hook and the draw hook in the device can be separated, and the draw hook in the device can be conveniently detached and replaced.

Description

Screw pre-tightening structure

Technical Field

The utility model relates to the technical field of screw structures, in particular to a screw pre-tightening structure.

Background

The screw rod assembly is a motion mechanism for transmitting linear motion like a gear rack, has higher precision, better environment, lower noise and higher speed compared with the gear rack, and is more expensive and is generally used for precise positioning.

But the lead screw is in long-term pivoted in-process, because change and the wearing and tearing of temperature, the length that expend with heat and contract with cold can lead to the lead screw can take place corresponding change, and gap or rocking can appear in lead screw and anchor structure at this moment, influence the precision of product to the lead screw surface is long-term with slider friction, needs to change the lead screw when wearing and tearing to a certain extent, but complicated anchor structure can be inconvenient for changing the lead screw.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art, and provides a screw pre-tightening structure, wherein a threaded sleeve is matched with a threaded column in a pre-tightening device to provide pre-tightening force for a screw in the rotating process, so that the screw is pulled at two ends to stably operate when the screw is deformed, and when the screw is deformed and excessively worn and needs to be replaced, a pull ring in the device is pulled to separate a hook from a hook groove, so that the screw is convenient to detach and replace.

The utility model also provides a screw pre-tightening structure, which comprises a base, wherein the upper surface of the base is connected with a left fixed block in a sliding manner, the right surface of the left fixed block is rotationally connected with a threaded sleeve, the upper surface of the base is fixedly connected with a limit sliding rail, and a bolt is arranged in the left fixed block;

the pre-tightening device comprises a connecting shell, a pull ring, a hook, a spring, a hook groove and a threaded column, wherein the hook is fixedly connected with one end of the spring, which is far away from the hook, is fixedly connected with the connecting shell, and the outer surface of the connecting shell is fixedly connected with the threaded column;

the upper surface fixedly connected with right fixed block of base, the right surface fixedly connected with motor of right fixed block, the surface fixedly connected with lead screw fixed block of couple, the surface fixedly connected with lead screw of lead screw fixed block, the surface threaded connection of lead screw has the screw slider.

According to the screw pre-tightening structure, the lower surface of the left fixing block is in sliding connection with the limiting sliding rails, the number of the limiting sliding rails is two, the limiting sliding rails are distributed front and back, and the left fixing block is pushed leftwards along the limiting sliding rails to give up a certain length when the screw thread column is reversely rotated during disassembly.

According to the screw pre-tightening structure, the upper surface of the base is provided with a bolt hole, and the bolt is matched with the bolt hole and used for fixing the left fixing block without left and right movement.

According to the screw pre-tightening structure, the outer surface of the pull ring is fixedly connected with the hooks, the number of the hooks is two and the hooks are distributed up and down and are used for conveniently pulling the hooks to be separated from the hook grooves.

According to the screw pre-tightening structure, the output end of the motor is fixedly connected with the threaded sleeve, the inner surface of the threaded sleeve is in threaded connection with the threaded column, and the threaded sleeve and the threaded column are used for being tightened more and more when the output end of the motor rotates, so as to provide pre-tightening force.

According to the screw pre-tightening structure, a draw hook groove is formed in the screw fixing block and is matched with the hook for clamping the draw hook.

According to the screw pre-tightening structure, the lower surface of the threaded slider is in sliding connection with the base, and the number of the pre-tightening devices is two and distributed left and right.

According to the screw pre-tightening structure, the motor is electrically connected with an external power supply.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is an overall block diagram of a lead screw pretensioning structure of the present utility model;

FIG. 2 is a lead screw structure diagram of a lead screw pretensioning structure according to the present utility model;

FIG. 3 is a block diagram of a base of a screw pretension structure according to the present utility model;

fig. 4 is a cross-sectional view of a pretensioning device of a screw pretensioning structure according to the present utility model.

Legend description:

1. a base; 2. a left fixed block; 3. a threaded sleeve; 4. a pre-tightening device; 5. a screw rod; 6. a right fixed block; 7. a motor; 8. a limit sliding rail; 9. a plug pin; 10. a screw rod fixing block; 11. a thread slider; 12. a connection housing; 13. a pull ring; 14. a hook; 15. a spring; 16. a drag hook groove; 17. and (5) a threaded column.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

Referring to fig. 1-4, the screw pre-tightening structure of the embodiment of the utility model comprises a base 1, wherein the upper surface of the base 1 is slidably connected with a left fixed block 2, the right surface of the left fixed block 2 is rotatably connected with a threaded sleeve 3, the upper surface of the base 1 is fixedly connected with limiting slide rails 8, the lower surface of the left fixed block 2 is slidably connected with the limiting slide rails 8, the number of the limiting slide rails 8 is two and distributed front and back, a bolt 9 is arranged in the left fixed block 2, the upper surface of the base 1 is provided with a bolt hole, and the bolt 9 is matched with the bolt hole.

The number of the pretightening force devices 4 is two, the pretightening force devices 4 are distributed left and right, each pretightening force device 4 comprises a connecting shell 12, a pull ring 13, a hook 14, a spring 15, a pull hook groove 16 and a threaded column 17, one end of each hook 14 is fixedly connected with one end of each spring 15, which is far away from each hook 14, is fixedly connected with the connecting shell 12, the outer surface of the connecting shell 12 is fixedly connected with the threaded column 17, the outer surface of the pull ring 13 is fixedly connected with each hook 14, and the number of the hooks 14 is two and distributed up and down.

The upper surface fixedly connected with right fixed block 6 of base 1, the right surface fixedly connected with motor 7 of right fixed block 6, motor 7 and external power source electric connection, the output and the screw sleeve 3 fixed connection of motor 7, the internal surface and the screw post 17 threaded connection of screw sleeve 3, the surface fixedly connected with lead screw fixed block 10 of couple 14, the surface fixedly connected with lead screw 5 of lead screw fixed block 10, the surface threaded connection of lead screw 5 has screw slide 11, the lower surface and the base 1 sliding connection of screw slide 11, the inside of lead screw fixed block 10 is provided with draw hook groove 16, draw hook groove 16 and couple 14 adaptation.

Working principle: starting the motor 7, the output end of the motor 7 drives the threaded sleeve 3 to rotate, the threaded sleeve 3 drives the pretightening force device 4 to rotate, the pretightening force device 4 drives the screw rod 5 to rotate, the threaded sleeve 3 and the threaded column 17 are connected in a reverse threaded mode when the motor provides rotating force to rotate continuously, so that transverse pretightening force is provided for two ends of the screw rod 5, the screw rod 5 is pulled to enable the screw rod to stably operate when the length of the screw rod is deformed, the threaded slider 11 moves transversely along the screw rod 5 while the screw rod 5 rotates, when the screw rod 5 needs to be replaced, the bolt 9 is pulled out, the pretightening force device 4 can be rotated in the same direction as the output end of the motor 7 to separate the threaded sleeve 3 from the pretightening force device 4, and then the pull ring 13 is pulled, so that the screw rod 5 and the pretightening force device 4 can be separated, and the screw rod 5 is convenient to disassemble.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A lead screw pretension structure, characterized by comprising: the novel anti-theft device comprises a base (1), wherein the upper surface of the base (1) is connected with a left fixed block (2) in a sliding manner, the right surface of the left fixed block (2) is connected with a threaded sleeve (3) in a rotating manner, the upper surface of the base (1) is fixedly connected with a limiting sliding rail (8), and a bolt (9) is arranged in the left fixed block (2);

the pre-tightening device (4), the pre-tightening device (4) comprises a connecting shell (12), a pull ring (13), a hook (14), a spring (15), a draw hook groove (16) and a threaded column (17), wherein the hook (14) is fixedly connected with one end of the spring (15), one end of the spring (15) far away from the hook (14) is fixedly connected with the connecting shell (12), and the outer surface of the connecting shell (12) is fixedly connected with the threaded column (17);

the novel screw fixing device is characterized in that a right fixing block (6) is fixedly connected to the upper surface of the base (1), a motor (7) is fixedly connected to the right surface of the right fixing block (6), a screw fixing block (10) is fixedly connected to the outer surface of the hook (14), a screw (5) is fixedly connected to the outer surface of the screw fixing block (10), and a threaded sliding block (11) is connected to the outer surface of the screw (5) in a threaded mode.

2. The screw pre-tightening structure according to claim 1, wherein the lower surface of the left fixed block (2) is slidably connected with the limiting slide rails (8), and the number of the limiting slide rails (8) is two and is distributed front and back.

3. Screw pretensioning structure according to claim 1, characterized in that the upper surface of the base (1) is provided with a bolt hole, the bolt (9) being adapted to the bolt hole.

4. The screw pre-tightening structure according to claim 1, wherein the outer surface of the pull ring (13) is fixedly connected with hooks (14), and the number of the hooks (14) is two and distributed up and down.

5. The screw pre-tightening structure according to claim 1, wherein the output end of the motor (7) is fixedly connected with the threaded sleeve (3), and the inner surface of the threaded sleeve (3) is in threaded connection with the threaded column (17).

6. Screw pretensioning arrangement according to claim 1, characterized in that the screw fixing block (10) is provided with a draw hook groove (16) inside, the draw hook groove (16) being adapted to the hook (14).

7. The screw pre-tightening structure according to claim 1, wherein the lower surface of the threaded slider (11) is slidably connected with the base (1), and the number of the pre-tightening devices (4) is two and distributed left and right.

8. A screw pretensioning structure according to claim 1, characterized in that the motor (7) is electrically connected to an external power source.