CN216618447U

CN216618447U - Opening and closing structure for polygonal rack transmission

Info

Publication number: CN216618447U
Application number: CN202220210849.1U
Authority: CN
Inventors: 古长风; 汪鹏飞; 张柳
Original assignee: Wuhu Lepu Electronic Technology Co ltd
Current assignee: Wuhu Lepu Electronic Technology Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-05-27
Anticipated expiration: 2032-01-26

Abstract

The utility model provides an opening and closing structure driven by a polygonal rack, which comprises a stepping motor, wherein the stepping motor is arranged inside a protective shell, a lower supporting structure is arranged above the protective shell, one side of the lower supporting structure, which is far away from the protective shell, is provided with an upper supporting structure, the outer sides of the lower supporting structure and the upper supporting structure are respectively provided with a plurality of grooves, each groove corresponds to and forms a movable cavity, the centers of the lower supporting structure and the upper supporting structure form a cylindrical cavity, a screw rod is vertically arranged inside the cylindrical cavity, one end of the screw rod is fixedly connected with the output end of the stepping motor, the screw rod is sleeved with the polygonal rack, the bottom end of the polygonal rack is symmetrically provided with positioning grooves, and the two sides of the screw rod are symmetrically provided with vertical positioning guide rods, so that the opening and closing structure is exquisite and compact, the volume is small, the process is simple, and the control precision is high, accurate opening and closing degree control can be achieved.

Description

Opening and closing structure for polygonal rack transmission

Technical Field

The utility model mainly relates to the technical field of motor control, in particular to an opening and closing structure for polygonal rack transmission.

Background

The common driving mode of the conventional opening and closing mechanism is that compressed air or hydraulic pressure drives a cylinder or an oil cylinder to drive a connecting rod mechanism to realize opening and closing movement, such as a hydraulic gripper of an engineering truck, a door machine opening and closing mechanism on automobile loading equipment and the like. Because the precision of this drive mode is not high, and difficult control, often use in some open spaces and the occasion of simple action execution, and along with the development of intelligent driving, especially the development of special unmanned car product, the precision that similar opening and shutting action requirements such as some snatch mechanisms, the mechanism that opens and shuts that load on this kind of special-purpose car is higher and higher, and traditional mechanism that opens and shuts has some fundamental problems as follows:

1. the requirement is that the similar opening and closing mechanism must have a hydraulic pressure source or a compressed air source, and the support of the power source needs a special hydraulic pressure station and an air compressor.

2. The cylinder or the oil cylinder actuator is not easy to perform follow-up control, only can perform selective action control, and cannot control the opening and closing degree in real time.

3. The whole mechanism is large in size and poor in structural manufacturability, and oil pipes and air pipes need to be connected.

4. The oil circuit and the gas circuit of the system have sealing risk, and leakage and maintenance cost are caused by long-term use.

5. The link mechanism has low precision and complex assembly.

6. The opening and closing actions can not be digitalized and intelligentized, and the specific form parameters of the opening and closing mechanism can not be known in real time during application.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides an opening and closing structure for polygonal rack transmission, which is used for solving the technical problems in the background technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a multi-side rack driven opening and closing mechanism comprises a stepping motor, wherein the stepping motor is arranged inside a protective shell, a lower supporting structure is arranged above the protective shell, an upper supporting structure is arranged on one side, away from the protective shell, of the lower supporting structure, a plurality of grooves are formed in the outer sides of the lower supporting structure and the upper supporting structure, each groove corresponds to and forms a movable cavity, a cylindrical cavity is formed in the centers of the lower supporting structure and the upper supporting structure, a lead screw is vertically arranged inside the cylindrical cavity, one end of the lead screw is fixedly connected with the output end of the stepping motor, a polygonal rack is sleeved on the lead screw, positioning grooves are symmetrically formed in the bottom end of the polygonal rack, vertical positioning guide rods are symmetrically arranged on two sides of the lead screw, the positioning guide rods are matched with the positioning grooves, and nuts are arranged at the top end of the polygonal rack, the nut is movably mounted on the screw rod, the outer teeth of the polygonal rack are connected with special-shaped rotary sector gears in a meshed mode, and each special-shaped rotary sector gear is movably connected with the side wall of the movable cavity through a rotating shaft.

Furthermore, the output end of the stepping motor penetrates through the top of the protective shell and extends into the cylindrical cavity.

Furthermore, the lower supporting structure and the protective shell are fixedly connected through a motor locking screw.

Furthermore, go up bearing structure and be located one side of every recess and all seted up fixed chamber, every fixed intracavity portion all is equipped with structure locking screw, just under bracing structure and last bearing structure are through a plurality of structure locking screw fixed connection.

Furthermore, three rack locking screws are uniformly arranged at one end, far away from the polygonal rack, of the nut, and the nut is fixedly connected with the top of the polygonal rack through the three rack locking screws.

Furthermore, each special-shaped rotary sector gear is connected with the corresponding rotary shaft in an integrated manner and is realized by adopting a die forming process.

Furthermore, the bottom ends of the two positioning guide rods are fixedly connected with the top of the protective shell.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model adopts the precise control of the stepping angular displacement and the angular speed, and utilizes the screw rod transmission and the rack transmission to control and convert the angular displacement angular speed, the linear displacement and the linear speed, thereby realizing the precise control of the angular displacement and the angular speed of the special-shaped rotating sector gear, achieving the precise opening and closing degree control, and simultaneously having the advantages of exquisite and compact structure, small volume, simple process, intelligent control support, high control precision, no need of additionally increasing a compressed air source and a hydraulic source in engineering application, and effectively reducing the engineering cost compared with the traditional structural scheme. The door machine opening and closing mechanism and the upper loading gripper mechanism on the automobile upper loading equipment or the robot actuating mechanism can effectively improve the control performance and precision, and can directly realize automatic and intelligent control through the conversion of electric signals.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the external structure of the present invention;

FIG. 2 is a schematic illustration of the transmission system of the present invention;

FIG. 3 is a top schematic view of the present invention;

FIG. 4 is a schematic top view of the nut of the present invention;

FIG. 5 is a side view of a polygonal rack of the present invention;

FIG. 6 is a schematic illustration of the transmission assembly of the present invention.

In the figure: 1. a stepping motor; 2. a lower support structure; 3. an upper support structure; 4. a screw rod; 5. A nut; 6. a special-shaped rotary sector gear; 7. a rotating shaft; 8. a rack locking screw; 9. a structural locking screw; 10. a polygonal rack; 11. a motor locking screw; 12. a protective shell; 13. A groove; 14. a movable cavity; 15. a cylindrical cavity; 16. positioning a guide rod; 17. positioning a groove; 18. And fixing the cavity.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1-6, in which a multi-side rack-driven opening and closing mechanism includes a stepping motor 1, the stepping motor 1 is disposed inside a protective housing 12, an output end of the stepping motor 1 extends into a cylindrical cavity 15 through a top of the protective housing 12, a lower supporting structure 2 is disposed above the protective housing 12, the lower supporting structure 2 and the protective housing 1 are fixedly connected through a motor locking screw 11, an upper supporting structure 3 is disposed on a side of the lower supporting structure 2 away from the protective housing 12, a fixing cavity 18 is disposed on a side of the upper supporting structure 3 located at each groove 13, a structure locking screw 9 is disposed inside each fixing cavity 18, the lower supporting structure 2 and the upper supporting structure 3 are fixedly connected through a plurality of structure locking screws 9, a plurality of grooves 13 are disposed on outer sides of the lower supporting structure 2 and the upper supporting structure 3, each groove 13 corresponds to and forms a movable cavity 14, a cylindrical cavity 15 is formed in the centers of the lower support structure 2 and the upper support structure 3, a lead screw 4 is vertically arranged in the cylindrical cavity 15, one end of the lead screw 4 is fixedly connected with the output end of the stepping motor 1, a polygonal rack 10 is sleeved on the lead screw 4, positioning grooves 17 are symmetrically formed in the bottom end of the polygonal rack 10, vertical positioning guide rods 16 are symmetrically arranged on two sides of the lead screw 4, the bottom ends of the two positioning guide rods 16 are fixedly connected with the top of the protective shell 12, the positioning guide rods 16 are matched with the positioning grooves 17, a nut 5 is arranged at the top end of the polygonal rack 10, three rack locking screws 8 are uniformly arranged at one end, far away from the polygonal rack 10, of the nut 5, and the nut 5 is fixedly connected with the top of the polygonal rack 10 through the three rack locking screws 8, nut 5 movable mounting is on lead screw 4, just all the meshing is connected with the rotatory sector gear of abnormal shape 6 on the outside tooth of polygon rack 10, every the rotatory sector gear of abnormal shape 6 all is connected as an organic whole and adopts the fashioned technology of mould with the rotation axis 7 that corresponds to be connected of the lateral wall swing joint in activity chamber 14, every the rotatory sector gear of abnormal shape 6 all is connected and adopts the fashioned technology of mould with the rotation axis 7 formula that corresponds to realize. The stepping motor 1 generates a synchronous rotating magnetic field when being connected with the pulse current of the controller, drives the main shaft of the stepping motor 4 to drive the screw rod 4 to rotate, the rotating speed of the stepping motor 4 is n, wherein f is the frequency of the pulse current, theta is a step angle, the common step angle is 1.8 degrees or 0.9 degrees, the common pulse frequency range is 400-25000Hz, and the rotating speed of the driving screw rod 4 can be subjected to stepless speed regulation within the rotating speed range of 12rpm-750rpm through accounting of the step angle of 1.8 degrees.

The driving screw rod 4 drives the nut 5 to do linear motion, as shown in the figure, the nut 5 is combined with the polygonal rack 10 through a rack locking screw, and the polygonal rack 10 also does linear motion synchronously with the nut 5. The moving speed v is v, if the lead p of the screw rod is 2mm, the moving speed v of the polygonal rack 10 is within 0.4mm/s-25mm/s for stepless speed regulation.

v＝np

The linear motion of the polygonal rack 10 drives the special-shaped rotating sector gear 6 to rotate around the rotating shaft 7, and the rotating speed n1 of the rack driving the special-shaped rotating sector gear 6 is related to the rack-gear transmission linear-angular transmission ratio i.

As shown in the figure, six mounting points of the special-shaped rotary sector gear 6 are arranged on the circumference, and two, three, four or six special-shaped rotary sector gears 6 can be symmetrically assembled according to actual conditions to form an opening and closing mechanism which can be freely matched.

The polygonal rack 10 and the nut 5 can be made of different materials respectively, for example, the polygonal rack 10 is made of POM engineering plastics through injection molding, the nut 5 is made of brass through gold processing, the two materials are used in combination, the transmission performance is more excellent, the transmission noise is reduced, the processing technology is improved, and the advantages of toughness and strength of different materials are exerted.

The special-shaped rotary sector gear 6 and the rotary shaft 7 are integrally formed by injection molding or powder metallurgy dies in the actual production process, so that the precision of parts is guaranteed, meanwhile, the process assembly is optimized, and the assembly workload is reduced.

The lower support structure 2 and the upper support structure 3 are locked by means of structural locking screws 9, and a movable chamber 14 formed by upper and lower grooves 13 provides a rotary support for the rotary shaft 7.

Meanwhile, the stepping motor 1 can accurately control the angle of the driving screw rod 4 by controlling the number of pulses while controlling the pulse current frequency of the controller, that is, the accurate distance of the polygonal rack 10 can be accurately controlled, so that the rotation angle of the special-shaped rotating sector gear 6 can be accurately controlled. Therefore, the whole opening and closing mechanism can accurately control the opening and closing degree and the opening and closing speed within the opening and closing range.

The specific operation mode of the utility model is as follows:

when the synchronous control device is used, the stepping motor 1 generates a synchronous rotating magnetic field when being connected with a controller pulse current, a main shaft of the stepping motor 4 is driven to drive the screw rod 4 to do rotating motion, the screw rod 4 drives the nut 5 to do linear motion, the polygonal rack 10 and the nut 5 synchronously do linear motion, the polygonal rack 10 drives the special-shaped rotating sector gear 6 to do rotating motion around the rotating shaft 7 through linear motion, and therefore the rotating angle of the special-shaped rotating sector gear 6 is accurately controlled. Therefore, the whole opening and closing mechanism can accurately control the opening and closing degree and the opening and closing speed within the opening and closing range.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The utility model provides a multilateral rack drive's mechanism that opens and shuts, including step motor (1), its characterized in that: the stepping motor (1) is arranged inside a protective shell (12), a lower supporting structure (2) is arranged above the protective shell (12), an upper supporting structure (3) is arranged on one side, far away from the protective shell (12), of the lower supporting structure (2), a plurality of grooves (13) are formed in the outer sides of the lower supporting structure (2) and the upper supporting structure (3), each groove (13) corresponds to and forms a movable cavity (14), a cylindrical cavity (15) is formed in the centers of the lower supporting structure (2) and the upper supporting structure (3), a lead screw (4) is vertically arranged inside the cylindrical cavity (15), one end of the lead screw (4) is fixedly connected with the output end of the stepping motor (1), a polygonal rack (10) is sleeved on the lead screw (4), positioning grooves (17) are symmetrically formed in the bottom end of the polygonal rack (10), and vertical positioning guide rods (16) are symmetrically arranged on two sides of the lead screw (4), location guide bar (16) and constant head tank (17) phase-match, the top of polygon rack (10) is equipped with nut (5), nut (5) movable mounting is on lead screw (4), just all the meshing is connected with heterotypic rotatory sector gear (6), every on the outside tooth of polygon rack (10) heterotypic rotatory sector gear (6) all are through the lateral wall swing joint of rotation axis (7) and activity chamber (14).

2. The opening and closing mechanism of a polygonal rack gear according to claim 1, characterized in that: the output end of the stepping motor (1) penetrates through the top of the protective shell (12) and extends into the cylindrical cavity (15).

3. The opening and closing mechanism of a polygonal rack gear according to claim 1, characterized in that: the lower supporting structure (2) is fixedly connected with the protective shell (12) through a motor locking screw (11).

4. The opening and closing mechanism of a polygonal rack gear according to claim 1, characterized in that: go up bearing structure (3) and be located one side of every recess (13) and all seted up fixed chamber (18), every fixed chamber (18) inside all is equipped with structure locking screw (9), just under bracing structure (2) and last bearing structure (3) are through a plurality of structure locking screw (9) fixed connection.

5. The opening and closing mechanism of a polygonal rack gear according to claim 1, characterized in that: one end, far away from the polygonal rack (10), of the nut (5) is evenly provided with three rack locking screws (8), and the nut (5) is fixedly connected with the top of the polygonal rack (10) through the three rack locking screws (8).

6. The opening and closing mechanism of a polygonal rack gear according to claim 1, characterized in that: each special-shaped rotary sector gear (6) is integrally connected with a corresponding rotary shaft (7) and is realized by adopting a die forming process.

7. The opening and closing mechanism of a polygonal rack gear according to claim 1, characterized in that: the bottom ends of the two positioning guide rods (16) are fixedly connected with the top of the protective shell (12).