CN212112216U

CN212112216U - Workbench lifting servo system

Info

Publication number: CN212112216U
Application number: CN202020904948.0U
Authority: CN
Inventors: 盛向红; 何菊成; 张�浩; 黄敏; 张戈阳
Original assignee: Shanghai Pasheng Pharmaceutical Equipment Co ltd
Current assignee: Shanghai Pasheng Pharmaceutical Equipment Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-12-08
Anticipated expiration: 2030-05-26

Abstract

The utility model provides a workstation lift servo, include: a servo motor; a cam shaft driven by the servo motor, and a cam assembled on the cam shaft; a mounting seat for mounting the camshaft; the roller is in contact with the outer contour of the cam, and the roller shaft is in tight fit with the inner diameter of the roller; the push rod, the screw rod and the workbench are connected with the roller shaft and the roller into a whole; the distances between each point on the outer contour of the cam and the center of the cam are different, and under the action of the servo motor, the rollers move up and down along with the rotation of the cam, so that the workbench reciprocates along the vertical direction. According to the utility model discloses, an environment-friendly pollution-free is provided, the workstation location is accurate, strikes and vibrations reduce, workstation lift servo that the noise reduces.

Description

Workbench lifting servo system

Technical Field

The utility model relates to a servo field, more specifically relates to a workstation lift servo.

Background

In the process of producing capsules by a capsule machine, a plurality of needle modules are required to be arranged in a certain arrangement sequence and run on the whole production line in a circulating manner, when the plurality of needle modules which are arranged side by side run to the position of a workbench, the workbench rises, the needle modules are pushed into the workbench, and then the workbench descends so that a conveying belt can convey the needle modules to the next process; here, the workstation has played the effect of accepting and the needle module of keeping in, because several needle modules move the workstation side by side, they are all very sensitive to vibrations, straightness, drop, easily receive its influence and empty, and this has just proposed the requirement to the workstation: the table should be accurately positioned and remain stable.

The early stage of lifting the workbench adopts oil cylinder driving, the oil cylinder driving positioning is accurate, the stability is good, the use requirement can be met, but the oil cylinder is easy to pollute the working environment and is gradually eliminated; at present, an air cylinder is mainly adopted for driving, a workbench lifting device 200 used in the prior art is shown in fig. 1, an air cylinder 20 is connected with a workbench 9 'through a connecting nut 13', and compared with oil cylinder driving, the air cylinder driving is environment-friendly and can basically meet working requirements, so that the device is widely applied at present; however, cylinder driving also brings about some problems: 1. due to the compressibility of air, the position can be deviated, so that the workbench is not accurately positioned; 2. when the cylinder moves up and down to an end point, impact and vibration are generated, so that the workbench is unstable; 3. the impact caused by the movement of the cylinder can cause the impact of the workbench and other connecting pieces, and environmental noise is generated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a workstation lift servo to solve the capsule machine among the prior art when producing the capsule, there is polluted operational environment, and the workstation location is inaccurate, and is unstable, produces ambient noise's problem.

In order to solve the technical problem, the utility model discloses a following technical scheme:

provided is a table elevation servo system including: a servo motor; a cam shaft driven by the servo motor, and a cam assembled on the cam shaft; a mounting seat for mounting the camshaft; the roller is in contact with the outer contour of the cam, and the roller shaft is in tight fit with the inner diameter of the roller; the push rod, the screw rod and the workbench are connected with the roller shaft and the roller into a whole; the distances between each point on the outer contour of the cam and the center of the cam are different, and under the action of the servo motor, the rollers move up and down along with the rotation of the cam, so that the workbench reciprocates along the vertical direction.

Preferably, the camshaft adjusting device further comprises a speed reducer connected with the servo motor, and the speed reducer is connected with the camshaft through a key.

Preferably, the camshaft is mounted on the mount via a bearing.

Preferably, the roller shaft is mounted on a connecting block through a bearing, and the push rod is in threaded connection with the connecting block.

Preferably, the push rod is in sliding fit with the guide sleeve.

Preferably, the screw rod is connected with the push rod through a connecting nut.

The screw is brought into face contact with the bottom surface of the table through the top surface thereof.

Preferably, the servo motor and the speed reducer are circumferentially fixed through a key and a key groove and are fixedly connected through a screw.

Preferably, the cam is keyed to the camshaft.

According to the utility model, the servo motor is adopted to drive the cam mechanism, the existing cylinder driving mode is replaced, the problems of inaccurate and unstable positioning of the workbench are thoroughly solved, and the shutdown fault caused by the inaccurate and unstable positioning of the workbench is basically eliminated; the servo motor ensures accurate positioning and can conveniently realize various continuous or intermittent or reverse movements; the cam mechanism mainly comprises a cam, a cam shaft and the like, and can convert the rotary motion of the motor into linear motion; the cam profile curve is optimized to ensure smooth movement, so that various impacts and vibrations and various noises caused by the impacts and the vibrations are effectively eliminated, and the working environment of production operators is improved; the worktable lifting servo system is not only suitable for the capsule machine, but also can be used for any other appropriate equipment or other fields.

In a word, the utility model provides an environment-friendly pollution-free, the workstation location is accurate, strikes and vibrations reduce, workstation lift servo that the noise reduces.

Drawings

FIG. 1 is a schematic view of a table lifting device of the prior art;

fig. 2 is a schematic diagram of a table lift servo system provided in accordance with a preferred embodiment of the present invention;

fig. 3 is an enlarged view of a portion of the details of the table lift servo system shown in fig. 2.

Detailed Description

The present invention will be further described with reference to the following specific embodiments. It should be understood that the following examples are illustrative of the present invention only and are not intended to limit the scope of the present invention.

Referring to fig. 2 to 3, a table lifting servo system 100 according to a preferred embodiment of the present invention includes: a servo motor 1; a camshaft 3 driven by a servo motor 1; a cam 2 fitted on a camshaft 3; a mount 4 for mounting the camshaft 3; a roller 5 contacting with the outer contour of the cam 2, and a roller shaft 6 closely fitting with the inner diameter of the roller 5; the push rod 7, the screw 8 and the workbench 9 are connected in sequence, and the push rod 7, the screw 8 and the workbench 9 are connected with the roller shaft 6 and the roller 5 into a whole; the distances between each point on the outer contour of the cam 2 and the center of the cam 2 are different, and under the action of the servo motor 1, the radius of the contour line of the cam 2 at the contact part with the roller 5 can be changed continuously along with the rotation of the cam 2, so that the roller 5 moves up and down, and the workbench 9 reciprocates along the vertical direction.

According to the preferred embodiment, the servo motor driving device further comprises a speed reducer 10 connected with the servo motor 1, the servo motor 1 and the speed reducer 10 are circumferentially fixed with a key groove through keys and are fixedly connected through screws, and the speed reducer 10 is connected with the camshaft 3 through keys.

The camshaft 3 is mounted on the mount 4 by means of bearings.

The roller shaft 6 is arranged on the connecting block 11 through a bearing, and the push rod 7 is in threaded connection with the connecting block 11.

According to the preferred embodiment, the device further comprises a guide sleeve 12 arranged on the mounting seat 4, and the push rod 7 is in sliding fit with the guide sleeve 12.

The screw rod 8 is connected with the push rod 7 through a connecting nut 13.

The screw 8 is brought into face contact with the bottom surface of the table 9 through the top surface thereof.

According to the preferred embodiment, the cam 2 is keyed to the camshaft 3.

The operation principle of the table lifting servo system 100 according to the above preferred embodiment is described as follows:

servo motor 1 passes through reduction gear 10 and drives camshaft 3 and cam 2 and rotate, and along with cam 2's rotation, because each point is different from the cam center distance on cam 2's the surface, during the radius increase, roller 5 is up pushed up with cam 2's surface, and when the radius reduced, because workstation dead weight descends downwards, servo motor 1 constantly rotates, drives the rotation that cam 2 does not stop, and reciprocating motion is along vertical direction to workstation 9.

According to the utility model, the servo motor can accurately control the rotating speed, the steering and the random start or stop, so that the lifting motion of the workbench is very stable, the original problems are thoroughly solved, and the stability is proved through test detection and use feedback of users; in addition, various impacts and vibrations and various noises caused thereby are effectively eliminated, and the working environment of production operators is improved.

What has been described above is only the preferred embodiment of the present invention, not for limiting the scope of the present invention, but various changes can be made to the above-mentioned embodiment of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. The present invention is not described in detail in the conventional technical content.

Claims

1. A workbench lift servo system, comprising:

a servo motor;

a cam shaft driven by the servo motor, and a cam assembled on the cam shaft;

a mounting seat for mounting the camshaft;

the roller is in contact with the outer contour of the cam, and the roller shaft is in tight fit with the inner diameter of the roller; and

the push rod, the screw rod and the workbench are connected with the roller shaft and the roller into a whole;

the distances between each point on the outer contour of the cam and the center of the cam are different, and under the action of the servo motor, the rollers move up and down along with the rotation of the cam, so that the workbench reciprocates along the vertical direction.

2. The table lift servo system of claim 1, further comprising a reducer connected to the servo motor, the reducer being keyed to the camshaft.

3. The table lift servo system of claim 1, wherein the cam shaft is mounted to the mount by a bearing.

4. The table lift servo system of claim 1, wherein the roller shaft is mounted on a connecting block by a bearing, and the push rod is threadedly connected to the connecting block.

5. The table lift servo system of claim 4, further comprising a guide sleeve mounted on the mount, the push rod being in sliding engagement with the guide sleeve.

6. The table lift servo system of claim 5, wherein the screw is coupled to the push rod by a coupling nut.

7. The table lift servo system of claim 1, wherein the screw is in face contact with a bottom surface of the table through a top surface thereof.

8. The servo system of claim 2, wherein the servo motor and the reducer are fixed circumferentially by a key and a key slot and are fixedly connected by a screw.

9. The table lift servo system of claim 1, wherein the cam is keyed to the cam shaft.