CN220748957U

CN220748957U - Gap eliminating nut

Info

Publication number: CN220748957U
Application number: CN202322525854.9U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Unionx Electric Machinery Technology Co ltd
Current assignee: Zhejiang Unionx Electric Machinery Technology Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2024-04-09
Anticipated expiration: 2033-09-18

Abstract

The application provides a clearance nut that disappears relates to mechanical transmission technical field, including nut body, drum lock sleeve and thrust spring. The nut body is cylindrical, an internal thread is arranged in the nut body, one end of the nut body is a fixed end, the other end of the nut body is a free end, a conical surface is coaxially arranged on the outer cylindrical surface of the free end, and an opening of the conical surface faces the free end; the nut body is provided with a plurality of dividing grooves parallel to the axis direction at the free end, the dividing grooves are used for dividing the free end of the nut body into a plurality of valve cantilevers, and each cantilever is provided with a part of internal threads and a part of conical surface. The cylinder lock sleeve is used for being sleeved on the outer side of the free end, and an inner conical surface matched with the conical surface is arranged in the cylinder lock sleeve. The thrust spring is arranged between the fixed end and the cylinder lock sleeve and is used for applying elasticity to the cylinder lock sleeve so as to enable the inner conical surface and the conical surface to be extruded. The gap can be eliminated in real time.

Description

Gap eliminating nut

Technical Field

The utility model relates to the technical field of mechanical transmission, in particular to a clearance eliminating nut.

Background

In the linear transmission with high transmission precision requirement, a screw rod mechanism is often used, however, a gap is usually generated on the contact surface of the screw rod and the nut due to relative movement, and the transmission precision is reduced due to the generation of the gap. Existing anti-backlash nuts generally use two nuts to act in opposite directions to eliminate the backlash of the screw rod and the nut, but due to the use of two nuts, concentricity is poor, and the generated backlash is difficult to eliminate in real time.

Disclosure of Invention

The utility model aims to provide a gap eliminating nut, which solves the problems that the existing gap eliminating nut is poor in concentricity and difficult to eliminate generated gaps in real time.

In order to solve the technical problems, the utility model provides a clearance eliminating nut which comprises a nut body, a cylinder lock sleeve and a thrust spring.

The nut body is cylindrical, an internal thread is arranged in the nut body, one end of the nut body is a fixed end, the other end of the nut body is a free end, a conical surface is coaxially arranged on the outer cylindrical surface of the free end, and an opening of the conical surface faces the free end; the nut body is provided with a plurality of dividing grooves in the direction parallel to the axis at the free end, the dividing grooves are used for dividing the free end of the nut body into a plurality of valve cantilevers, and each cantilever is provided with a part of internal threads and a part of conical surface.

The cylinder lock sleeve is used for being sleeved on the outer side of the free end, and an inner conical surface matched with the conical surface is arranged in the cylinder lock sleeve.

The thrust spring is arranged between the fixed end and the cylinder lock sleeve and is used for applying elasticity to the cylinder lock sleeve so as to enable the inner conical surface and the conical surface to be extruded.

In the utility model, the thrust spring pushes the cylinder lock sleeve along the axial direction, so that the cylinder lock sleeve applies axial force to the conical surface of the cantilever through the inner cone, the axial force can be decomposed into radial force according to the angle of the conical surface, and the inner thread of the cantilever is continuously contacted with the outer thread of the screw rod, thereby eliminating the generated gap in real time.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a side view of a nut body according to an embodiment of the utility model;

FIG. 3 is a perspective view of a nut body according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a cylinder lock sleeve according to an embodiment of the present utility model;

FIG. 5 is a side view of an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of section A-A of FIG. 5.

Wherein, 1: a nut body; 2: a cylinder lock sleeve; 3: a thrust spring; 4: triangular gaskets; 11: an internal thread; 12: conical surface; 13: a dividing groove; 14: a cantilever; 15: a triangular flange seat; 21: an inner conical surface; 22: and (5) a shaft shoulder.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiments of the present utility model, all directional indicators (such as up, down, left, right, front, and rear … …) are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), if the specific posture is changed, the directional indicators correspondingly change, and the connection may be a direct connection or an indirect connection.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

As shown in fig. 1, in an embodiment of the present application, the anti-backlash nut provided in the present embodiment includes a nut body 1, a cylinder lock sleeve 2, and a thrust spring 3.

In this embodiment, the anti-backlash nut further comprises a triangular washer 4, and the triangular washer 4 is disposed on the contact surface of the triangular flange seat 15 and the thrust spring 3.

The hardness of the nut body 1 is low, the triangular gasket is used for facilitating the fixed installation of the triangular flange seat 15, and the upper thrust spring 3 can also crush and damage the nut body 1.

As shown in fig. 2, which is a side view of the nut body in the present embodiment, as shown in fig. 3, which is a perspective view of the nut body in the present embodiment, the nut body 1 is cylindrical, an internal thread 11 is provided inside, one end of the nut body 1 is a fixed end, the other end is a free end, a conical surface 12 is coaxially provided on an outer cylindrical surface of the free end, and an opening of the conical surface 12 faces the free end; the nut body 1 is provided with a plurality of dividing grooves 13 parallel to the axial direction at the free end, the dividing grooves 13 are used for dividing the free end of the nut body 1 into a plurality of petal cantilevers 14, and each cantilever 14 is provided with a part of internal thread 11 and a part of conical surface 12.

Wherein, the internal thread 11 of the nut body 1 is used for installing and matching with the external thread of the screw rod, and the fixed end can be used for installing the nut body 1. The conical surface 12 can be integrally formed with the nut body 1, the dividing groove 13 divides the free end of the nut body 1 into three-petal cantilevers 14, one end of each cantilever 14 is connected with the fixed end, and the internal thread 11 and the conical surface 12 of the free end are equally divided by the three-petal cantilevers 14, so that each cantilever 14 is provided with a part of the internal thread 11 and a part of the conical surface 12. The other end of the cantilever 14 is suspended and is easily elastically deformed, and when receiving an axial force in the axial direction, the end can approach the screw rod, thereby eliminating the gap between the internal thread 11 and the external thread of the screw rod.

In the present embodiment, the fixed end of the nut body 1 is provided with a triangular flange seat 15.

The anti-backlash nut needs to be fixed on the frame for use, so that the nut body 1 needs to be provided with a flange seat, and a screw hole is formed in the flange seat. The area of the triangular flange seat is smaller, and the triangular flange seat can be used for more mounting positions.

As shown in fig. 4, in this embodiment, the cylinder lock sleeve 2 is used to be sleeved outside the free end, and an inner conical surface 21 matching with the conical surface 12 is provided in the cylinder lock sleeve 2.

Wherein the inner conical surface 21 of the cylinder lock sleeve 2 can be in contact with the conical surface 12 of the cantilever 14 and, under the influence of an external force, an elastic force is applied to the cantilever 14 through the contact surface, which elastic force has a component in a direction perpendicular to the axis, which component acts on the cantilever 14 to bring the inner thread 11 of the cantilever 14 close to the outer thread of the screw rod, thereby reducing the clearance. Moreover, the noble conical surfaces of the embodiment are matched, so that the stability of transmission can be improved, and the stress of the cantilever 14 is more uniform.

In the present embodiment, the outer circumferential surface of the cylinder lock sleeve 2 is provided with a shoulder 22, and the shoulder 22 is used for mounting the thrust spring 3.

The shoulder 22 may be realized by a stepped shaft, and the thrust spring 3 may be mounted on the shoulder 22, so that the thrust spring 3 may be prevented from contacting the nut body 1. And the cylinder lock can protect the cantilever 14 and prevent debris and other sundries from falling into the threads.

The thrust spring 3 is disposed between the fixed end and the cylinder lock sleeve 2, and is used for applying elastic force to the cylinder lock sleeve 2, so that the inner conical surface 21 and the conical surface 12 are extruded.

The thrust spring 3 can provide continuous thrust for the cylinder lock sleeve 2, and can eliminate generated gaps in real time, so that the performance of the anti-backlash nut is improved.

As shown in fig. 5 and 6, in the anti-backlash nut provided in the present embodiment, two conical surfaces 12 are coaxially disposed on the outer cylindrical surface of the free end, and two inner conical surfaces 21 are disposed on the inner circumferential surface of the cylinder lock sleeve 2 and are respectively engaged with the two conical surfaces 12.

The two conical surfaces 12 are used for distributing the acting force from the cylinder lock sleeve 2, so that the acting force is more stable than one conical surface 12, and the diameter of the bottom surface of the conical surface 12 can be reduced under the condition of the same stress area, so that the whole volume of the anti-backlash nut is reduced, and the application range of the anti-backlash nut provided by the embodiment is wider.

In this embodiment, the conicity of both conical surfaces 12 is the same, and is greater than or equal to 1/5.

The taper of the two conical surfaces 12 is the same, so that the two conical surfaces 12 can be stressed simultaneously, and the taper of the two conical surfaces 12 is greater than or equal to 1/5, so that the component force of the cantilever 14 perpendicular to the axis can be improved, and the internal thread 11 of the cantilever 14 and the external thread of the screw rod can be more tightly contacted.

In this embodiment, the length of the conical surface 12 near the fixed end along the axis is smaller than the length of the other conical surface 12 along the axis.

When the cylinder lock sleeve 2 is installed, the free end of the nut body 1 needs to be pressed in, so that the cylinder lock sleeve 2 is sleeved outside the free end, the diameter of the bottom of the conical surface 12 close to the fixed end is smaller, and the installation of the cylinder lock sleeve 2 can be facilitated. The diameter of the bottom of the conical surface 12 near the free end is larger, so that the cylinder lock sleeve 2 can be clamped, and the possibility that the cylinder lock sleeve 2 falls off is reduced.

In this embodiment, the cylinder lock sleeve 2 is made of an aluminum alloy material.

Among them, the cylinder lock sleeve 2 needs to be in contact with the thrust spring 3 and transmit the elastic force, so that sufficient strength is required, and the inner tapered surface 21 of the cylinder lock sleeve 2 and the tapered surface 12 of the nut body 1 generate sliding friction, so that a certain wear resistance is also required. The embodiment is made of aluminum alloy materials, so that the requirements can be met, the weight is light, and the weight of the whole anti-backlash nut can be reduced.

In this embodiment, the nut body 1 is made of a wear resistant plastic material.

The nut body 1 needs to have certain elasticity and wear resistance, and the service life of the nut body 1 can be prolonged by using wear-resistant plastics.

In summary, the present application has the following beneficial effects:

(1) Only one nut is used, so that the concentricity of installation can be ensured, and the installation quality is improved.

(2) The pressure is continuously provided through the thrust spring, so that gaps generated in real time can be eliminated, and the transmission precision is ensured.

(3) Through the cooperation of two conical surfaces, can reduce the volume under the same pressure condition, increase application scope.

(4) The cylinder lock sleeve can shield and protect the internal thread, and prevent sundries such as scraps and the like from falling into the thread.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the utility model.

Claims

1. The anti-backlash nut is characterized by comprising a nut body (1), a cylinder lock sleeve (2) and a thrust spring (3);

the nut comprises a nut body (1), a nut body and a nut, wherein the nut body (1) is cylindrical, an internal thread (11) is arranged in the nut body, one end of the nut body (1) is a fixed end, the other end of the nut body is a free end, a conical surface (12) is coaxially arranged on the outer cylindrical surface of the free end, and an opening of the conical surface (12) faces the free end; the nut body (1) is provided with a plurality of dividing grooves (13) parallel to the axial direction at the free end, the dividing grooves (13) are used for dividing the free end of the nut body (1) into a plurality of petal cantilevers (14), and each cantilever (14) is provided with a part of the internal thread (11) and a part of the conical surface (12);

the cylinder lock sleeve (2) is used for being sleeved outside the free end, and an inner conical surface (21) matched with the conical surface (12) is arranged in the cylinder lock sleeve (2);

the thrust spring (3) is arranged between the fixed end and the cylinder lock sleeve (2) and is used for applying elastic force to the cylinder lock sleeve (2) so that the inner conical surface (21) and the conical surface (12) are extruded.

2. The anti-backlash nut according to claim 1, characterized in that two conical surfaces (12) are coaxially arranged on the outer cylindrical surface of the free end, and two inner conical surfaces (21) are arranged on the inner circumferential surface of the cylinder lock sleeve (2) and are respectively matched with the two conical surfaces (12).

3. The anti-backlash nut according to claim 2, characterized in that the conicity of both conical surfaces (12) is identical, both greater than or equal to 1/5.

4. A nut as claimed in claim 3, characterized in that the length of the conical surface (12) near the fixed end along the axis is smaller than the length of the other conical surface (12) along the axis.

5. The anti-backlash nut according to claim 1, characterized in that the outer circumferential surface of the cylinder lock sleeve (2) is provided with a shoulder (22), the shoulder (22) being used for mounting the thrust spring (3).

6. The anti-backlash nut according to claim 1, characterized in that the cylinder lock sleeve (2) is made of an aluminum alloy material.

7. The anti-backlash nut according to claim 1, characterized in that the fixed end of the nut body (1) is provided with a triangular flange seat (15).

8. The anti-backlash nut according to claim 7, characterized in that the nut body (1) is made of a wear-resistant plastic material.

9. The anti-backlash nut according to claim 7, characterized in that it further comprises a triangular washer (4), said triangular washer (4) being arranged on the contact surface of the triangular flange seat (15) with the thrust spring (3).