CN216555195U

CN216555195U - Straight line module

Info

Publication number: CN216555195U
Application number: CN202120696302.2U
Authority: CN
Inventors: 杨绪剑; 孙新群
Original assignee: Weihai Saiwei Intelligent Technology Co ltd
Current assignee: Weihai Saiwei Intelligent Technology Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2022-05-17
Anticipated expiration: 2031-04-06

Abstract

The utility model discloses a linear module, which is characterized in that: comprises a base (1); a ball nut (2) rotatably connected to the mounting hole (11) through a mounting sleeve (21); a ball screw (3) which is screwed to the ball nut (2); a body (4) fixed to the ball screw (3); the driven wheel (5) is sleeved and fixed on the periphery of the mounting sleeve (21); a driving wheel (6); the transmission belt (7) is wound on the peripheries of the driven wheel (5) and the driving wheel (6) so as to enable the driven wheel (5) to synchronously rotate along with the driving wheel (6); and a driving part (8), wherein a power output shaft of the driving part is coaxially connected with the driving wheel (6) and used for driving the driving wheel (6) to rotate. Compared with the prior art, the module provided by the utility model runs along the long stroke of the Z axis, can run at high speed and achieves high precision.

Description

Straight line module

Technical Field

The utility model relates to the technical field of transmission mechanisms, in particular to a linear module.

Background

In the field of linear transmission, rack and pinion, ball screw and synchronous belt transmissions are the three most common transmission forms. The gear rack is suitable for long-distance transmission, but has the defects of low positioning precision caused by open transmission and limited running speed; the ball screw has stable transmission, high precision and low noise, but the common fixing mode is that the screw rotates, the nut moves linearly, the screw is supported by the bearing blocks at two ends, one end of the screw is generally fixedly supported, and the other end of the screw is in floating support, so that when the transmission stroke is long, the screw shakes obviously, and the transmission precision and speed are influenced; when the transmission mode is used as a Z-axis (in the vertical direction, the nut and the slide block are fixed, and the lead screw supports the body to move) component of the picking manipulator, the motor needs to move along with the body, so that the ineffective load in the Z direction is increased, and the movement speed and the precision are also influenced; synchronous belt drive operates steadily, and the precision is moderate, and the noise is low, but the shortcoming lies in that the transmission stroke can not be too big, otherwise the elastic deformation of belt will lead to the precision to reduce, and is the same with ball screw drive mode also not suitable for the Z axle of picking up the manipulator.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a linear module suitable for long-distance, high-precision and moderate-speed transmission aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a straight line module, its characterized in that: comprises that

The base is provided with a mounting hole in a penetrating manner along the height direction;

the ball nut is rotatably connected in the mounting hole of the base through a mounting sleeve;

the ball screw and the ball nut are combined into a ball screw nut transmission pair;

a body fixed to the ball screw;

the driven wheel is sleeved on the periphery of the mounting sleeve and is fixed relative to the mounting sleeve;

the driving wheels are arranged on one side of the driven wheel side by side;

the transmission belt is wound on the peripheries of the driven wheel and the driving wheel so as to enable the driven wheel to synchronously rotate along with the driving wheel; and

and the power output shaft of the driving piece is coaxially connected with the driving wheel and used for driving the driving wheel to rotate.

In order to facilitate the direct stable connection of the body and the ball screw, the body is strip-shaped and is arranged side by side with the ball screw, and the upper end and the lower end of the body are respectively connected with the upper end and the lower end of the ball screw.

In order to ensure the stable lifting of the body, the base is provided with a through hole for the body to penetrate through, and the base is provided with a linear guide rail sliding block capable of guiding the up-and-down lifting of the body.

In order to realize the guiding of the body, the linear guide rail sliding block is provided with a sliding groove extending along the height direction, correspondingly, the side wall of the body is provided with a linear guide rail extending along the height direction, and at least part of the linear guide rail can be inserted in the sliding groove in a sliding way.

In order to ensure stable guiding, the number of the linear guide rails is two, and the linear guide rails are symmetrically arranged on two sides of the body.

In order to save the processing cost of the linear guide rail sliding blocks while ensuring stable guiding, each linear guide rail corresponds to at least two linear guide rail sliding blocks which are arranged at intervals along the height direction.

In order to make the whole pulley module more compact, one side edge of the body facing the ball screw is provided with an arc surface matched with the outer contour of the driven wheel.

In order to reduce the dead weight of the body, lightening holes for reducing the weight are formed in the body along the height direction.

In order to realize fixed connection, the driven wheel and the mounting sleeve are connected with each other through a key groove structure; or/and

the power output shaft of the driving piece is connected with the driving wheel through a key groove structure.

Compared with the prior art, the utility model has the advantages that: the driving piece does not directly drive the screw to rotate, but drives the ball nut to rotate to realize the linear motion of the screw, the two ends of the screw are fixed and suitable for large-stroke transmission, and the driving piece is particularly suitable for being used as a Z shaft of a picking manipulator, so that the driving motor does not move up and down along with the body, namely, the driving motor is fixed and fixed in the Z shaft direction, the body moves up and down, the weight of a moving part is reduced, and in addition, the linear module is high in precision and moderate in speed transmission.

Drawings

FIG. 1 is a schematic perspective view of a linear module according to an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the linear module of FIG. 1;

FIG. 3 is a longitudinal cross-sectional view of the linear die set of FIG. 1;

figure 4 is a transverse cross-sectional view of the linear module of figure 1 (with the belt omitted).

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Fig. 1 to 4 show a preferred embodiment of the linear module according to the present invention. The linear module comprises a base 1, a ball nut 2, a ball screw 3, a body 4, a driven wheel 5, a driving wheel 6, a transmission belt 7 and a driving piece 8.

Wherein, the base 1 is gone up and is run through along the direction of height and has been seted up mounting hole 11 and perforation 12, has arranged two linear guide slider 13 along the direction of height interval arrangement respectively on the inside wall of perforation 12 front and back both sides, sets up the spout 131 that extends along the direction of height on this linear guide slider 13.

A mounting sleeve 21 is fixed to the outer periphery of the ball nut 2, a screw hole 22 extending in the height direction is formed in the ball nut 2, and the mounting sleeve 21 is rotatably coupled to the mounting hole 11 of the base 1.

The ball screw 3 is inserted into the screw hole 22 of the ball nut 2, is screwed to the ball nut 2, and is combined with the ball nut 2 to form a ball screw nut transmission pair.

The body 4 is strip-shaped, penetrates through the through hole 12 of the base 1 and is arranged side by side with the ball screw 3, and the upper end and the lower end of the body 4 are respectively connected with the upper end and the lower end of the ball screw 3. A pair of linear guide rails 41 extending in the height direction are symmetrically arranged on the side walls of the front side and the rear side of the body 4, each linear guide rail 41 is provided with two linear guide rail sliding blocks 13 correspondingly, and at least part of the linear guide rail 41 can be inserted in the sliding groove 131 of the corresponding linear guide rail sliding block 13 in a sliding manner, so that the linear guide rail sliding blocks 13 can guide the up-and-down lifting of the body 4. In addition, the body 4 is provided with weight-reducing holes 43 along the height direction, and in the present embodiment, the number of the weight-reducing holes 43 is four, and the holes are arranged in a matrix.

The driven wheel 5 is sleeved on the periphery of the mounting sleeve 21 and is connected with the mounting sleeve 21 through a key groove structure. In order to give way to the driven wheel 5, the side of the body 4 facing the ball screw 3 is provided with a circular arc surface 42 matched with the outer contour of the driven wheel 5, so that the whole pulley module can be more compact.

The driving wheels 6 are arranged side by side on one side of the driven wheels 5,

the transmission belt 7 is wound on the peripheries of the driven wheel 5 and the driving wheel 6, so that the driven wheel 5 synchronously rotates along with the driving wheel 6; and

the driving member 8 is a motor, and a power output shaft thereof is coaxially connected with the driving wheel 6 through a key groove structure, so as to drive the driving wheel 6 to rotate.

The working principle of the embodiment is as follows: the driving piece 8 is started to drive the driving wheel 6 to rotate, the driven wheel 5 rotates synchronously with the driving wheel due to the transmission effect of the transmission belt 7, the ball nut 2 is driven to rotate through the installation sleeve 21, the ball screw 3 is in threaded connection with the ball nut 2, the ball screw 3 moves along the height direction with the driving wheel, the body 4 is finally driven to move synchronously relative to the base 1, and similarly, the body 4 moves in the opposite direction during reverse driving, so that the up-and-down movement of the body 4 is realized. Different from traditional lead screw rotation in ball is rotary motion, in this scheme, driving piece 8 is not the rotation of direct drive ball 3, but rotates through drive ball nut 2 and realizes ball 3 along the long stroke operation of Z axle, like this, driving piece 8 need not to follow the Z axle and moves together, bears a burden for a short time, but high-speed operation to reach the high accuracy.

Claims

1. A straight line module, its characterized in that: comprises that

The base (1) is provided with a mounting hole (11) in a penetrating manner along the height direction;

a ball nut (2) rotatably connected to the mounting hole (11) of the base (1) through a mounting sleeve (21);

the ball screw (3) and the ball nut (2) are combined into a ball screw nut transmission pair;

a body (4) fixed to the ball screw (3);

the driven wheel (5) is sleeved on the periphery of the mounting sleeve (21) and is fixed relative to the mounting sleeve (21);

a driving wheel (6) arranged side by side on one side of the driven wheel (5);

the transmission belt (7) is wound on the peripheries of the driven wheel (5) and the driving wheel (6) so as to enable the driven wheel (5) to synchronously rotate along with the driving wheel (6); and

and a power output shaft of the driving piece (8) is coaxially connected with the driving wheel (6) and used for driving the driving wheel (6) to rotate.

2. The line module of claim 1, wherein: the body (4) is strip-shaped and is arranged side by side with the ball screw (3), and the upper end and the lower end of the body (4) are respectively connected with the upper end and the lower end of the ball screw (3).

3. The line module of claim 2, wherein: the base (1) is provided with a through hole (12) for the body (4) to penetrate through, and the base (1) is provided with a linear guide rail sliding block (13) which can guide the up-and-down lifting of the body (4).

4. The line module of claim 3, wherein: the linear guide rail sliding block (13) is provided with a sliding groove (131) extending along the height direction, correspondingly, the side wall of the body (4) is provided with a linear guide rail (41) extending along the height direction, and at least part of the linear guide rail (41) can be inserted into the sliding groove (131) in a sliding manner.

5. The line module of claim 4, wherein: the number of the linear guide rails (41) is two, and the linear guide rails are symmetrically arranged on two sides of the body (4).

6. The line module of claim 5, wherein: each linear guide rail (41) corresponds to at least two linear guide rail sliding blocks (13) which are arranged at intervals along the height direction.

7. The line module of claim 3, wherein: one side of the body (4) facing the ball screw (3) is provided with an arc surface (42) matched with the outer contour of the driven wheel (5).

8. The line module of claim 3, wherein: the body (4) is internally provided with lightening holes (43) for lightening the weight along the height direction.

9. The line module according to any of claims 1 to 8, wherein: the driven wheel (5) and the mounting sleeve (21) are connected with each other through a key groove structure; or/and

the power output shaft of the driving piece (8) is connected with the driving wheel (6) through a key groove structure.