CN110686058A

CN110686058A - Screw axial clearance adjusting mechanism

Info

Publication number: CN110686058A
Application number: CN201810735784.0A
Authority: CN
Inventors: 黄瑜智
Original assignee: Tricore Corp
Current assignee: Tricore Corp
Priority date: 2018-07-06
Filing date: 2018-07-06
Publication date: 2020-01-14

Abstract

A screw axial clearance adjusting mechanism is provided with a bracket, a screw is rotatably arranged on the bracket, and a threaded bearing is sleeved at one end of the screw, the threaded bearing is screwed in a first mounting hole on the bracket, and one end of the threaded bearing abuts against a baffle. Therefore, the user can rotate the threaded bearing to enable the threaded shaft to apply force to the screw rod to move through the baffle plate, and the effect of adjusting the axial clearance of the screw rod is achieved.

Description

Screw axial clearance adjusting mechanism

Technical Field

The invention relates to a transmission technology, in particular to a screw clearance adjusting mechanism which has the advantage of easy assembly and use.

Background

Screws are currently a common driving element mounted to a base to provide rotational motion. In order to achieve the purpose of accurate transmission, two nuts screwed on the screw rod and a spring penetrating the screw rod and located between the two nuts are arranged on the screw rod, one of the nuts abuts against the base, the nut is pushed by the elasticity of the spring, and a user can achieve the purpose of adjusting the axial clearance of the screw rod by adjusting the distance between the nuts, so that the transmission process is smoother and the noise is reduced.

However, the nut and the spring are difficult to assemble due to the increased number of components, and the cost of parts and assembly are high, and they cannot be applied to a micro-machine.

Disclosure of Invention

The invention aims to provide a screw axial clearance adjusting mechanism which has the advantages of simple structure and easiness in installation and use.

Therefore, the present invention provides a screw axial gap adjusting mechanism, which comprises a bracket, a screw and a threaded bearing. The bracket is provided with a first mounting hole which is a screw hole; the screw rod is provided with a thread part and a baffle and is pivoted in the bracket by penetrating through the first mounting hole; a screw bearing is hollow and cylindrical and is sleeved with one end of the screw rod positioned in the first mounting hole, the outer peripheral surface of the screw bearing is provided with a thread part which is screwed in the first mounting hole, and one end of the screw bearing is propped against the baffle plate.

According to one embodiment of the present invention, the threaded bearing has a flange portion having an outer diameter larger than that of the threaded portion.

According to one embodiment of the invention, the flange portion has two heads projecting outwardly.

According to one embodiment of the present invention, the screw has a groove, and the stopper is fastened to the groove in a C-shape.

According to one embodiment of the present invention, the bracket has a vertical plate and two positioning plates extending outward from two opposite sides of the vertical plate in the same direction, the two positioning plates are respectively provided with the corresponding first mounting hole and a second mounting hole, and an inner peripheral surface of the second mounting hole is a smooth surface.

According to one embodiment of the present invention, the bracket has a positioning bearing installed in the second installation hole, such that the screw rod is installed between the threaded bearing and the positioning bearing.

According to one embodiment of the present invention, a blind hole is formed in the center of the positioning bearing for the screw to be inserted into.

According to one embodiment of the present invention, two through holes are respectively formed in the positioning plates, and the bracket is provided with a guide post which is fixedly disposed through the through holes.

According to one embodiment of the present invention, a sliding block is screwed on the screw rod.

Therefore, the user controls the rotation of the threaded bearing, so that the threaded bearing moves towards the direction of approaching or separating from the interior of the bracket, the baffle plate applies force to the screw rod to move along the axial direction of the screw rod, and the effect of adjusting the axial clearance of the screw rod is achieved. The screw axial clearance adjusting mechanism has less parts, is easy to assemble and operate, and can be operated by a user even by hands.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is an exploded view of an embodiment of the present invention.

Fig. 3 is a cross-sectional view of an embodiment of the present invention.

The reference numbers are as follows:

10 bracket

11 vertical plate

12 positioning plate

13 first mounting hole

14 second mounting hole

15 perforation

16 positioning bearing

17 blind hole

18 guide post

20 screw

21 rod body

22 thread part

23 groove

24 guard sheet

30 screw thread bearing

31 screw part

32 flange part

33 head part

40 sliding block

Distance D

Detailed Description

For the purpose of clearly illustrating the structure and technical effects achieved by the present invention, the following description is made in conjunction with the accompanying drawings. The screw axial clearance adjusting mechanism of the embodiment provided by the invention comprises a bracket 10, a screw 20 and a Threaded bearing 30(Threaded bearing), and the specific structures of the components are respectively described as follows:

referring to fig. 1 to 3, the bracket 10 has a vertical plate 11, and two positioning plates 12 extending outward from two opposite sides of the vertical plate 11 in the same direction, so that the bracket 10 is generally U-shaped, and the positioning plates 12 are provided with a first mounting hole 13, a second mounting hole 14 and two through holes 15, wherein the first mounting hole 13 is a screw hole with a thread on an inner peripheral surface, and the second mounting hole is a through hole with a smooth inner peripheral surface. In addition, the bracket 10 further has a positioning bearing 16 installed in the second mounting hole 14, a blind hole 17 is formed in the center of the positioning bearing 16, and the opening of the blind hole 16 faces the inside of the bracket 10.

The screw 20 is mainly a rod 21 and can pass through the first mounting hole 13 and the second mounting hole 14, and one end of the screw 20 is inserted into the blind hole 17 of the positioning bearing 16 and can rotate relative to the bracket 10. The middle section of the rod 21 is provided with a threaded portion 22, and one end of the rod 21 near the first mounting hole 13 is provided with a groove 23. In the present embodiment, the groove 23 is disposed at the edge of the threaded portion 22, and a person skilled in the art can adjust the position of the annular groove 23 as needed. In addition, the screw 20 is provided with a C-shaped stopper 24 which is fastened and fixed in the groove 23, so that the screw 20 and the stopper 24 can synchronously generate displacement.

The screw bearing 30 is hollow and cylindrical, and can be fitted to one end of the screw 20 located in the first mounting hole 13. The outer peripheral surface of the screw bearing 30 has a screw portion 31 screwed into the first mounting hole 13 and a flange portion 32 having an outer diameter larger than the screw portion 31. In this way, when the screw bearing 30 is mounted in the first mounting hole 13, one end of the screw bearing 30 abuts against the stopper 24, so that the position of the screw 20 can be adjusted by force. In addition, the flange portion 32 has two heads 33 protruding outward, which is convenient for the user to rotate the screw bearing 30 by hand or using other tools.

In addition to the above elements, the present embodiment further has a sliding block 40 screwed on the threaded portion 22 of the screw 20 for converting the rotational movement of the screw 20 into a linear movement, and the bracket 10 is further provided with a guide post 18 fixedly disposed through the two through holes 15 for guiding the sliding block 40 while preventing the sliding block 40 from rotating.

The assembling procedure of the screw axial gap adjustment mechanism of the present embodiment is described. Firstly, the stopper 24 is installed on the screw 20, secondly, one end of the screw 20 sequentially passes through the first installation hole 13 and the slider 40, thirdly, one end of the screw 20 is rotatably positioned on the positioning bearing 16, lastly, the screw bearing 30 is sleeved on the other end of the screw 20, the rotary screw bearing 30 is installed on the first installation hole 13 by screw lock, and the screw 20 is installed between the screw bearing 30 and the positioning bearing 16, therefore, the screw 20 can stably rotate. Therefore, the whole assembly process is completed, and the process is simple and quick.

After the assembly is completed, the end of the screw 20 inserted into the positioning bearing 16 is tightly matched with the blind hole 16, so that a small relative movement can be generated. Since one end of the screw bearing 30 abuts against the stopper 24, the user can utilize the flange portion 32 and the head portion 33 of the screw bearing 30 to rotate the screw bearing 30 clockwise or counterclockwise, so that the screw bearing 30 moves toward or away from the inside of the bracket 20, and meanwhile, the stopper 24 applies force to the screw 20 to move along the axial direction thereof, thereby changing the distance D between the stopper 24 and the positioning plate 12, as shown in fig. 3, and achieving the purpose of adjusting the axial gap of the screw.

It can be seen that the assembly process of the present invention is simple, and the user can easily rotate the screw bearing 30 to finely adjust the position of the screw 20, thereby changing the axial clearance of the screw.

Claims

1. A screw axial clearance adjusting mechanism is characterized by comprising:

the bracket is provided with a first mounting hole which is a screw hole;

the screw rod is provided with a thread part and a baffle and is pivoted in the bracket by penetrating through the first mounting hole; and

and the threaded bearing is hollow and cylindrical and is sleeved at one end of the screw rod positioned in the first mounting hole, and the peripheral surface of the threaded bearing is provided with a threaded part which is screwed in the first mounting hole so that one end of the threaded bearing is propped against the baffle.

2. The screw axial gap adjustment mechanism of claim 1, wherein the threaded bearing has a flange portion with an outer diameter larger than the threaded portion.

3. The screw axial gap adjustment mechanism of claim 2, wherein the flange portion has two heads projecting outwardly.

4. The axial gap adjustment mechanism according to claim 1, wherein the screw has a groove, and the stopper is C-shaped and is engaged with and fixed to the groove.

5. The axial gap adjusting mechanism of claim 1, wherein the bracket has a vertical plate and two positioning plates extending outward from two opposite sides of the vertical plate in the same direction, the two positioning plates are respectively provided with the corresponding first mounting hole and a second mounting hole, and the inner peripheral surface of the second mounting hole is a smooth surface.

6. The screw axial gap adjustment mechanism of claim 5, wherein the bracket has a positioning bearing mounted in the second mounting hole such that the screw is mounted between the threaded bearing and the positioning bearing.

7. The axial gap adjusting mechanism of claim 6, wherein the positioning bearing has a blind hole at the center for the screw to insert.

8. The axial gap adjusting mechanism according to claim 5, wherein two through holes are formed in each of the positioning plates, and the bracket is provided with a guide post fixedly disposed through the through holes.

9. The screw axial gap adjustment mechanism of claim 8, further comprising a slider threaded onto the screw.