CN112141677A

CN112141677A - Cylinder type indexing mechanism and control method thereof

Info

Publication number: CN112141677A
Application number: CN202010915482.9A
Authority: CN
Inventors: 杨建余; 何胜; 匡启敏
Original assignee: Hefei Zhongchen Light Industrial Machinery Co Ltd
Current assignee: Hefei Zhongchen Light Industrial Machinery Co Ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2020-12-29
Anticipated expiration: 2040-09-03
Also published as: CN112141677B

Abstract

The invention discloses a cylinder type indexing mechanism and a control method thereof, and relates to the technical field of mechanical devices of automatic indexing tables. The invention comprises a fixing mechanism, a driving device and a stop cylinder; the fixing mechanism comprises a fixing seat, the fixing seat is rotationally connected with a fixing shaft, the fixing shaft is fixedly connected with a rotary disc, and a plurality of transmission pin shafts are uniformly distributed on the rotary disc; the driving device comprises a cam plate and a push rod cylinder, the cam plate is provided with a cam groove, the telescopic end of the push rod cylinder is connected with a follower, and the follower is embedded into the cam groove; the stop cylinder is fixed with a stop ring. The invention takes the cylinder as power, drives the driving pin through the pusher dog, thus the worktable realizes indexing feeding, and designs the cylinder path cam on the basis of the indexing angle required by the worktable and the motion trail of the driving pin, so as to solve the problem of reverse rotation of the worktable generated when the cylinder retracts, and realize the intermittent rotation function of low cost, low energy consumption and high precision of the whole mechanism.

Description

Cylinder type indexing mechanism and control method thereof

Technical Field

The invention belongs to the technical field of mechanical devices of automatic indexing tables, and particularly relates to an air cylinder type indexing mechanism and a control method of the air cylinder type indexing mechanism.

Background

In the production and manufacturing process of automatic equipment, the intermittent rotation function of the annular workbench, namely commonly called rotation indexing, is often required to be realized. Common mechanical rotary indexing mechanisms are usually realized by adopting a ratchet mechanism, a groove wheel mechanism, an incomplete tooth mechanism and the like, and the mechanisms have rigid impact in the operation process and are not suitable for high-speed movement; cam dividers have also been used to perform indexing functions that allow high speed, accuracy and torque, but are expensive to manufacture and maintain.

In addition, there are electrically controlled indexing mechanisms such as servo motors and stepping motors, which are relatively expensive to manufacture; the motor needs to be started and stopped frequently, so that the control cost is high and the service life is short; meanwhile, due to the existence of accumulated errors, the positioning precision is reduced after long-term use.

Disclosure of Invention

The invention aims to provide an air cylinder type indexing mechanism and a control method thereof.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention is a cylinder type indexing mechanism, comprising:

the fixing mechanism comprises a fixing seat, the fixing seat is rotatably connected with a fixing shaft to realize free rotation of the rotary plate, the fixing shaft is fixedly connected with a rotary plate through bolts, and a plurality of transmission pin shafts for transmission and limiting are uniformly distributed on the rotary plate;

the driving device comprises a cam plate and a push rod cylinder, the cam plate is provided with a cam groove, the telescopic end of the push rod cylinder is connected with a follower, and the follower is embedded into the cam groove;

and the stopping cylinder is fixed with a stopping ring for limiting and stopping the rotary disk.

Furthermore, the end face of the rotary disk is provided with a plurality of through holes.

Further, the follower includes a finger and a wheel.

Further, the device further comprises an auxiliary mechanism, the auxiliary mechanism comprises a fixing plate, the fixing plate is connected with the push rod cylinder, the fixing plate is connected with a guide shaft, the other side of the guide shaft is connected with a guide plate, and the shifting claw is fixed on the guide plate.

Further, the cam groove is a closed quadrilateral channel, and the inside of the channel is divided into a push path and a return path.

A control method of a cylinder type indexing mechanism, comprising the steps of:

step one, when the push rod cylinder extends out, the pusher dog is driven to move forwards along the cam groove in a pushing path, and after the pusher dog contacts the transmission pin shaft, the transmission pin shaft is pushed to move to a farthest point along a rear half section path of the pushing path, and finally the rotary disc is driven to rotate for a set angle. Meanwhile, the stop cylinder extends out, and the transmission pin shafts of the other stations are inserted into the stop rings arranged on the stop cylinder to fix the rotary disc;

and step two, when the push rod cylinder retracts, the pusher dog moves backwards along the return path of the cam groove to be separated from the transmission pin shaft, the pusher dog moves to the nearest point along the rear half path of the return path, the stop cylinder retracts before the cylinder extends out next time, and the transmission pin shaft is separated from the stop ring.

The invention has the following beneficial effects:

the invention takes the cylinder as power, drives the driving pin through the pusher dog, thus the worktable realizes indexing feeding, and designs the cylinder path cam on the basis of the indexing angle required by the worktable and the motion trail of the driving pin, so as to solve the problem of reverse rotation of the worktable generated when the cylinder retracts, and realize the intermittent rotation function of low cost, low energy consumption and high precision of the whole mechanism.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a cylinder indexing mechanism of the present invention;

FIG. 2 is a cross-sectional view of a rotary holder of the cylinder indexing mechanism;

FIG. 3 is a cross-sectional view of a push rod cylinder of the cylinder indexing mechanism;

FIG. 4 is a diagram of the extension state of the push rod cylinder in the cylinder indexing mechanism;

FIG. 5 is a view showing a retracted state of a push rod cylinder in the cylinder indexing mechanism;

FIG. 6 is a diagram of the path of the fingers in the cylinder indexing mechanism;

in the drawings, the components represented by the respective reference numerals are listed below:

101-a rotary fixed seat, 102-a transmission pin shaft, 103-a rotary shaft, 104-a rotary disc, 201-a fixed lug seat, 202-a push rod cylinder, 203-a fixed plate, 204-a guide shaft, 205-a cam, 206-a guide sleeve, 207-a guide plate, 208-a follower, 209-a pusher dog, 210-a cam plate, 301-a stop cylinder, 302-a stop ring, and a push path; b. a backhaul path.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "end face", "upper", "lower", "front end", "inner", and the like, indicate an orientation or positional relationship, merely for convenience of description and brevity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.

Referring to fig. 1 to 3, the present invention is a cylinder type indexing mechanism and a control method thereof, including: a fixing mechanism 1, a driving device 2 and a stop cylinder 301.

The fixing mechanism 1 comprises a fixing seat 101, the fixing seat 101 is rotatably connected with a fixing shaft 103 through a rotary supporting bearing to realize free rotation of a rotary disc, the fixing shaft 103 is fixedly connected with a rotary disc 104 through bolts, a plurality of through holes are formed in the end face of the rotary disc 104, and a plurality of transmission pin shafts 102 are uniformly distributed on the rotary disc 104 and used for transmission and limiting of the rotary disc 104;

the driving device 2 comprises a cam plate 210 and a push rod cylinder 202, the push rod cylinder 202 is hinged with a fixed lug seat 201 to form a swing type cylinder, the fixed lug seat 201 is installed at a fixed position such as a frame, a cam groove 205 is formed in the cam plate 210, a follower 208 is connected to the telescopic end of the push rod cylinder 202, the follower 208 comprises a pusher dog 209 and a rotating wheel, the rotating wheel in the follower 208 is embedded into the cam groove 205, the cam groove 205 is a closed quadrilateral groove, a push path a and a return path b are formed in the groove, and the rotating wheel is provided with a pusher dog 209 and slides in the cam groove 205.

The stop cylinder 301 is installed at a fixed position such as a frame, the stop cylinder 301 is fixed with a stop ring 302, and the driving pin shaft 102 can be inserted into the stop ring 302 to fix the rotary disk 104.

The cylinder type indexing mechanism further comprises an auxiliary mechanism, the auxiliary mechanism comprises a fixing plate 203, the fixing plate 203 is connected with the push rod cylinder 202, a guide shaft 204 is connected onto the fixing plate 203, the other side of the guide shaft 204 is connected with a guide plate 207 through a guide sleeve, so that the push rod cylinder can bear lateral force, and the pusher dog 209 is fixed on the guide plate 207.

Referring to fig. 5, a method for controlling a cylinder type indexing mechanism includes the steps of:

in step one, when the push rod cylinder 202 extends, the pusher dog 209 is driven to move forward, as shown in fig. 5, the angle of the push rod cylinder 202 is consistent with the direction of the first half path of the push stroke path a, and the pusher dog 209 will move along the cam groove 205 by the push stroke path a. After the pusher dog 209 contacts the transmission pin shaft 102, under the dual actions of the cam plate 210 and the push rod cylinder 202, the transmission pin shaft 102 is pushed to move to the farthest point along the rear half section of the path a, and finally the rotary disc 104 is driven to rotate by a set angle; meanwhile, the stop cylinder 301 extends out, and the transmission pin shafts 102 of the rest stations are inserted into the stop ring 302 arranged on the stop cylinder 301 to fix the rotary disk 104, so that other equipment on the rotary disk can complete the designated process.

Step two, when the push rod cylinder 202 retracts, the pusher dog 209 is driven to move backwards, as shown in fig. 6, the angle formed by the push rod cylinder 202 is consistent with the direction of the front half path of the push stroke path b, the pusher dog 209 moves along the cam groove 205 by the return path b, the pusher dog 209 is separated from the transmission pin shaft 102, and under the dual actions of the cam plate 210 and the push rod cylinder 202, the pusher dog moves to the nearest point along the rear half path of the path b; before the next extension of the pushrod cylinder 202, the stop cylinder 301 is retracted and the drive pin 102 is disengaged from the stop ring 302. The reciprocating motion completes the unidirectional intermittent rotary motion of the rotary disk.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cylinder type indexing mechanism characterized by: the method comprises the following steps:

the fixing mechanism (1) comprises a fixing seat (101), the fixing seat (101) is rotatably connected with a fixing shaft (103), and the fixing shaft (103) is connected with a rotary disc (104); a plurality of transmission pin shafts (102) for transmission and limiting are uniformly distributed on the rotary disc (104);

the driving device (2) comprises a cam plate (210) and a push rod cylinder (202), the cam plate (210) is provided with a cam groove (205), the telescopic end of the push rod cylinder (202) is connected with a follower (208), and the follower (208) is embedded into the cam groove (205);

the stopping air cylinder (301), the stopping air cylinder (301) is fixed with a stopping ring (302) used for limiting and stopping the rotary disk (104).

2. A cylinder-type indexing mechanism according to claim 1, wherein the rotary disc (104) is provided with a plurality of perforations in its end face.

3. A cylinder type indexing mechanism according to claim 1, wherein the follower (208) comprises a finger (209) and a wheel.

4. The cylinder type indexing mechanism according to claim 1, further comprising an auxiliary mechanism, wherein the auxiliary mechanism comprises a fixing plate (203), the fixing plate (203) is connected with the push rod cylinder (202), the fixing plate (203) is connected with a guide shaft (204), the other side of the guide shaft (204) is connected with a guide plate (207), and the pusher dog (209) is fixed on the guide plate (207).

5. A cylinder-type indexing mechanism according to claim 1, wherein the cam groove (205) is a closed quadrilateral channel which is internally divided into a push path (a) and a return path (b).

6. A control method of the cylinder type indexing mechanism according to any one of claims 1 to 5, comprising the steps of:

step one, when a push rod cylinder (202) extends, a pusher dog (209) is driven to move forwards along a push stroke path (a) along a cam groove (205), and after the pusher dog (209) contacts a transmission pin shaft (102), the transmission pin shaft (102) is pushed to move to the farthest point of the push stroke path (a), and finally a rotary disc (104) is driven to rotate for a set angle; meanwhile, the stopping cylinder (301) extends out, and the transmission pin shafts (102) of other stations are inserted into a stopping ring (302) arranged on the stopping cylinder (301) to fix the rotary disc (104);

step two, when the push rod cylinder (202) retracts, the pusher dog (209) moves backwards along a return path (b) of the cam groove (205) and is separated from the transmission pin shaft (102), and the pusher dog (209) moves to the nearest point of the return path (b); the stop cylinder (301) retracts, and the transmission pin shaft (102) is separated from the stop ring (302).