CN216951524U

CN216951524U - Reverse double-screw reciprocating mechanism

Info

Publication number: CN216951524U
Application number: CN202220890024.9U
Authority: CN
Inventors: 李雪梅; 贺新栋; 姜明奎; 王大为; 黄颖; 郭宇欣; 李程; 张书瑞
Original assignee: Qiqihar University
Current assignee: Qiqihar University
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-12
Anticipated expiration: 2032-04-18

Abstract

The utility model discloses a reverse double-spiral reciprocating mechanism which comprises a reverse double-thread screw, a reverse double-thread groove, a rolling body retainer, a rolling bearing and a conical rolling body. One end of the conical rolling body is connected with the rolling body retainer, and the other end is arranged in a reverse double-thread groove on the reverse double-thread screw. When the reverse double-thread screw rotates, the conical rolling body rolls in the reverse double-thread groove and realizes linear motion, and when the conical rolling body moves to the end point of one spiral thread, the conical rolling body enters the starting point of the other spiral thread so as to enter the return motion, thereby realizing the conversion of rotary motion and linear motion. The reverse double-helix reciprocating mechanism has the advantages of compact structure, low vibration and noise and low possibility of abrasion.

Description

Reverse double-helix reciprocating mechanism

Technical Field

The utility model relates to a reverse double-helix reciprocating mechanism, which is particularly suitable for converting rotary motion into reciprocating linear motion and belongs to the technical field of machinery.

Background

In actual machinery, rotary motion is often required to be converted into reciprocating linear motion, and the mechanisms for converting rotary motion into reciprocating linear motion commonly used at present are a crank-slider mechanism and a cam mechanism. The disadvantage is that the structure is not compact, and the structure size is large when the stroke is large. When the rotating speed is fixed, the sliding block moves in a variable speed mode in the working process of the crank sliding block mechanism, and great vibration and noise can be caused during high-speed movement. The cam mechanism belongs to a high-amplitude mechanism which is difficult to lubricate and easy to wear and needs an elastic device for return stroke. At present, no mechanism with good transmission effect capable of converting continuous rotary motion into uniform reciprocating motion exists in the market.

Disclosure of Invention

The utility model provides a reverse double-helix reciprocating mechanism, aiming at overcoming the defects of the prior transmission mechanism that the structure is not compact, the noise is large and the abrasion is easy, and aiming at enabling the mechanism for converting the rotary motion into the reciprocating linear motion to be more compact, reducing the structural size and reducing the vibration and the noise generated during the motion.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a reverse double-screw reciprocating mechanism comprises a reverse double-screw, a reverse double-screw groove, a rolling element retainer, a rolling bearing and a conical rolling element, wherein one end of the conical rolling element is connected with the rolling element retainer, and the other end of the conical rolling element is arranged in the reverse double-screw groove on the reverse double-screw. When the reverse double-thread screw rotates, the conical rolling body rolls in the reverse double-thread groove and realizes linear motion, and when the conical rolling body moves to the end point of one spiral thread, the conical rolling body enters the starting point of the other spiral thread so as to enter the return motion, thereby realizing the conversion of rotary motion and linear motion.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of an embodiment of a reverse double helix reciprocating mechanism;

FIG. 2 is a schematic overall view of a reverse double-flighted screw according to an embodiment of the present invention;

FIG. 3 is a schematic view of the rolling element cage according to an embodiment of the present invention as a whole;

fig. 4 is an overall schematic view of a rolling bearing according to an embodiment of the present invention;

fig. 5 is an overall schematic view of a conical rolling element according to an embodiment of the present invention.

In the figure, 1 is a reverse double-thread screw, 11 is a reverse double-thread groove, 2 is a rolling element retainer, 21 is a through hole, 3 is a rolling bearing and 4 is a conical rolling element.

Detailed Description

As shown in fig. 1, the reverse double-helix reciprocating mechanism comprises a reverse double-thread screw 1, a reverse double-thread groove 11, a rolling element holder 2, a through hole 21, a rolling bearing 3 and a conical rolling element 4, wherein the rolling element holder 2 is connected with the reverse double-thread screw 1, and when the reverse double-thread screw 1 rotates, the rolling element holder 2 can drive other components to realize reciprocating linear motion.

As shown in fig. 3, the rolling element cage 2 includes a rolling bearing 3, through holes 21, and conical rolling elements 4, the three through holes 21 are evenly distributed on the rolling element cage 2 from the left to the right, and the rolling element cage 2 is connected to the conical rolling elements 4 through the rolling bearing 3 in the through holes 21.

As shown in fig. 1, the head diameter of the conical rolling element 4 is small in front and large in rear, is in a circular truncated cone shape, and moves mainly in a rolling manner with sliding in the reverse double-thread groove 11, and when the conical rolling element 4 moves to the end point of one turning thread, it enters the starting point of the other turning thread, and thus it enters the return motion.

As shown in fig. 1, the reverse double-thread screw 1 is cylindrical, the reverse double-thread screw 1 can be directly used as a shaft or connected with a gear through a key or other connection modes to participate in transmission, the reverse double-thread groove 11 is a rectangular thread, the specific size of the thread can be combined with specific conditions, and the thread depth meets the motion of the conical rolling body 4. The reverse double-thread grooves 11 are distributed on the reverse double-thread screw 1 in a crossed and symmetrical mode, one end of the conical rolling body 4 is connected with the rolling body retainer 2 through the rolling bearing 3, and the other end of the conical rolling body is arranged in the reverse double-thread grooves 11 on the reverse double-thread screw 1.

Claims

1. The utility model provides a reverse double helix round trip mechanism, contains reverse double thread screw rod (1), reverse double thread groove (11), rolling element holder (2), through-hole (21), antifriction bearing (3), coniform rolling element (4), its characterized in that: the rolling element retainer (2) is connected with the reverse double-thread screw (1), and when the reverse double-thread screw (1) rotates, the rolling element retainer (2) can drive other components to realize reciprocating linear motion.

2. A reverse double helix shuttle mechanism according to claim 1 wherein: the rolling element retainer (2) comprises rolling bearings (3), through holes (21) and conical rolling elements (4), wherein the three through holes (21) are uniformly distributed on the rolling element retainer (2) from left to right, and the rolling element retainer (2) is connected with the conical rolling elements (4) through the rolling bearings (3) in the through holes (21).

3. A reverse double helix shuttle mechanism according to claim 2 wherein: the diameter of the head of the conical rolling body (4) is small in the front and large in the rear, the head is in a circular truncated cone shape, the head mainly moves in a rolling mode accompanied with sliding in the reverse double-thread groove (11), and the conical rolling body (4) enters the starting point of one turning thread when moving to the end point of the other turning thread so as to enter the return motion.

4. A reverse double helix shuttle mechanism according to claim 1 wherein: the reverse double-thread screw (1) is cylindrical, the reverse double-thread grooves (11) are distributed on the reverse double-thread screw (1) in a crossed and symmetrical mode, one end of each conical rolling body (4) is connected with the rolling body retainer (2) through the rolling bearing (3), and the other end of each conical rolling body is arranged in the reverse double-thread groove (11) on the reverse double-thread screw (1).