CN216988725U

CN216988725U - Quick rejecting mechanism

Info

Publication number: CN216988725U
Application number: CN202220285709.0U
Authority: CN
Inventors: 马清海; 赖光兵
Original assignee: Smc Tianjin Manufacturing Co ltd; Smc China Co ltd; SMC Beijing Manufacturing Co Ltd; SMC Corp
Current assignee: Smc Tianjin Manufacturing Co ltd; Smc China Co ltd; SMC Beijing Manufacturing Co Ltd; SMC Corp
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-07-19
Anticipated expiration: 2032-02-11

Abstract

The application discloses a quick removing mechanism which comprises a shell, removing fingers, a coil, a control unit and a power supply; at least one rejecting finger is telescopically arranged in the shell, each rejecting finger is provided with one permanent magnet, and each permanent magnet is sleeved with one coil; each coil is electrically connected with the power supply through the control unit, and the control unit is used for controlling the coil to be electrified so as to drive the rejecting finger to stretch. According to the method, each rejecting finger is connected with a permanent magnet, a coil is sleeved outside the permanent magnet, and an electromagnetic field is formed by electrifying the coil, so that the permanent magnet moves under the action of the magnetic field force of the electromagnetic field, and the rejecting finger is driven to stretch; the fingers are driven and removed by utilizing the electromagnetic principle, so that the friction force generated when the fingers are removed is reduced, the action period can be shortened, and the action precision and stability are improved.

Description

Quick rejecting mechanism

Technical Field

The application relates to the technical field of product sorting, especially, relate to a mechanism is rejected fast.

Background

The product sorting is a more procedure used in the modern production process, and particularly in an assembly line represented by bottle production or canning, a removing mechanism is used for quickly removing unsuitable products.

With the progress of the technology, in order to improve the efficiency, the product conveying speed on some production lines reaches more than 2 m/s, the distance between two adjacent products is almost adhered together, only fingers which are not suitable for product covering areas are objectively required to act at the moment, fingers which are not covered need to retract, and otherwise, adjacent good products in front and at the back are mistakenly removed.

The existing rejecting mechanism uses a high-frequency valve to control a high-frequency cylinder as a finger action driving source, when the transmission speed reaches 2 m/s, and the diameter of a rejected workpiece is 60 mm, the time for each section of finger to extend and retract is only 0.03 second, the compressibility of gas per se is large, and along with long-time use, the mechanical friction inside the cylinder and the state change of a valve port of a speed regulating valve on the cylinder can cause instability of rejecting the finger action speed, so that the requirements of shorter action period and higher action precision and stability are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model provides a short, the quick mechanism of rejecting of action cycle height, action precision and stability are high is provided to the not enough of action cycle length and the precision that overcome among the prior art pneumatic finger of rejecting.

The technical scheme of the application provides a quick removing mechanism which comprises a shell, removing fingers, a coil, a control unit and a power supply;

at least one rejecting finger is telescopically arranged in the shell, each rejecting finger is provided with one permanent magnet, and each permanent magnet is sleeved with one coil;

each coil is electrically connected with the power supply through the control unit, and the control unit is used for controlling the coil to be electrified so as to drive the rejecting finger to stretch.

Further, the power supply comprises a forward direct current power supply and a reverse direct current power supply, and the control unit comprises at least one first contact and at least one second contact;

each of the coils is electrically connected to the forward direct current power supply through one of the first contacts, while each of the coils is electrically connected to the reverse direct current power supply through one of the second contacts.

Further, the control unit is a programmable logic controller.

Further, a rheostat is connected in series between each coil and the power supply.

Further, at least one guide rail is installed in the shell, and each rejecting finger can be installed on one guide rail in a sliding mode;

and the coil is electrified to drive the rejecting finger to slide along the guide rail.

Further, the removing fingers comprise a removing guide rod, a mounting screw and the permanent magnet;

the guide rod is connected to the rear end of the rejecting guide rod, the permanent magnet is sleeved at the rear end of the guide rod, and the mounting screw is screwed in from the rear end of the guide rod to fix the permanent magnet.

Further, the housing comprises a bottom shell, and a front cover plate and a rear cover plate which are arranged above the bottom shell;

the rejection finger is provided with a convex limiting block, and along with the expansion of the rejection finger, the limiting block is arranged on the front cover plate and moves between the rear cover plates.

Furthermore, a first cushion pad is installed at the rear end of the front cover plate, and a second cushion pad is installed at the front end of the rear cover plate.

Furthermore, the bottom shell comprises a bottom plate and two side plates vertically connected to two sides of the bottom plate, the front cover plate is covered above the front ends of the two side plates, and the rear cover plate is covered above the rear ends of the two side plates;

the guide rail is arranged on the bottom plate in parallel to the length direction of the side plates.

Further, the side plates are connected with the front cover plate and the rear cover plate through metal keys and connecting bolts;

each side plate is provided with a first groove, two sides of the front cover plate are respectively provided with a front groove corresponding to the first groove, the first grooves and the front grooves are oppositely arranged to form first mounting grooves, the metal keys are clamped in the first mounting grooves, and the connecting bolts sequentially penetrate through the front cover plate and the metal keys and then are screwed into the side plates;

every be provided with a second recess on the curb plate, the both sides of back shroud are provided with respectively one with the back recess that the second recess corresponds, the second recess with the back recess sets up relatively and forms the second mounting groove block in the second mounting groove the metal key, connecting bolt passes in proper order the back shroud the metal key back is twisted the curb plate.

After adopting above-mentioned technical scheme, have following beneficial effect:

according to the method, each rejecting finger is connected with a permanent magnet, a coil is sleeved outside the permanent magnet, and an electromagnetic field is formed by electrifying the coil, so that the permanent magnet moves under the action of the magnetic field force of the electromagnetic field, and the rejecting finger is driven to stretch; the fingers are driven and removed by utilizing the electromagnetic principle, so that the friction force generated when the fingers are removed is reduced, the action period can be shortened, and the action precision and stability are improved.

Drawings

The disclosure of the present application will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a schematic structural diagram of a fast removing mechanism in an embodiment of the present application;

FIG. 2 is an exploded view of a fast reject mechanism in an embodiment of the present application;

FIG. 3 is an exploded view of a finger culling in an embodiment of the present application.

Reference symbol comparison table:

a housing (01): the guide rail 11, the sliding seat 12, the front cover plate 13, the front groove 131, the rear cover plate 14, the rear groove 141, the bottom plate 15, the side plate 16, the second groove 161, the first cushion pad 17, the second cushion pad 18, the metal key 19 and the connecting bolt 110;

removing fingers 02: the removing guide rod 21, the spring positioning pin 211, the limiting block 212, the guide rod 22, the through hole 221, the mounting column 222, the permanent magnet 23, the mounting screw 24, the fastening bolt 25 and the gasket 26;

a coil 03, a varistor 05;

power supply 04: a forward direct current power supply 41 and a reverse direct current power supply 42.

Detailed Description

Embodiments of the present application are further described below with reference to the accompanying drawings.

It is easily understood that according to the technical solutions of the present application, a person skilled in the art can substitute various structural modes and implementation modes without changing the spirit of the present application. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present application, and should not be construed as limiting or restricting the technical solutions of the present application in their entirety.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixed or detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The foregoing is to be understood as belonging to the specific meanings in the present application as appropriate to the person of ordinary skill in the art.

The quick removing mechanism in the embodiment of the application is shown in fig. 1 and comprises a shell 01, a removing finger 02, a coil 03, a control unit and a power supply 04;

at least one removing finger 02 is telescopically arranged in the shell 01, each removing finger 02 is provided with a permanent magnet 23, and a coil 03 is sleeved outside each permanent magnet 23;

each coil 03 is electrically connected with the power supply 04 through the control unit, and the control unit is used for controlling the coil 03 to be electrified so as to drive the rejecting finger 02 to stretch.

In this embodiment, five removing fingers 02 are installed in the housing 01, the length of the five removing fingers 02 is gradually reduced from left to right, the front ends of the removing fingers 02 are set as inclined guide surfaces, and when the five removing fingers 02 are all in a retraction state, the front ends of the five removing fingers 02 form a continuous inclined surface.

In the application, the rear end of each rejecting finger 02 is provided with a permanent magnet 23, a coil 03 is sleeved outside each permanent magnet 23, and the control unit controls the energization of the coil 03. When the coil is electrified, the coil generates an electromagnetic field, and the permanent magnet 23 generates magnetic field force under the action of the electromagnetic field, so that the permanent magnet 23 is driven to drive the rejecting finger 02 to stretch.

Alternatively, the direction of the electromagnetic field generated by the coil 03 can be changed by controlling the current direction of the coil 03, thereby controlling the extension and retraction of the rejection finger 02; an elastic mechanism can be further arranged, the rejecting finger 02 is in a retraction state in a natural state, when the coil 03 is electrified, the permanent magnet 23 overcomes the elastic force of the elastic mechanism to drive the rejecting finger 02 to extend out under the action of an electromagnetic field, and when the coil 03 is powered off, the rejecting finger 02 retracts under the action of the elastic force of the elastic mechanism.

The embodiment of the application utilizes the electromagnetic principle, so that the coil 03 generates an electromagnetic field to drive the rejecting finger 02 to move, the coil 03 and the rejecting finger 02 are not mechanically connected, the generation of contact friction force is avoided, the rejecting finger 02 can be rapidly stretched out, the action period is shortened, and the action precision and the stability are improved.

In one embodiment, as shown in fig. 1, the power source 04 comprises a forward direct current source 41 and a reverse direct current source 42, and the control unit comprises at least one first contact and at least one second contact;

each coil 03 is electrically connected to a forward dc power supply 41 via a first contact, while each coil 03 is electrically connected to a reverse dc power supply 42 via a second contact.

Specifically, in fig. 1, the contacts Y1, Y3, Y5, Y7, and Y9 are all first contacts, and are respectively connected between the forward direct-current power supply 41 and the five coils 03; the contacts Y2, Y4, Y6, Y8 and Y10 are second contacts and are respectively connected between the reverse direct-current power supply 42 and the five coils 03.

The first contact and the second contact are both normally open contacts, and the first contact and the second contact cannot be closed simultaneously. The polarity of the forward direct current power supply 41 is opposite to that of the reverse direct current power supply 42, when the first contact is closed, the coil 03 is connected with the forward direct current power supply 41, and the forward direct current power supply 41 provides forward current for the coil 03; when the second contact is closed, the coil 03 and the reverse dc power supply 42 are turned on, and the reverse dc power supply 42 supplies a reverse current to the coil 03.

The embodiment of the application controls the extension and retraction of the rejecting finger 02 by changing the current flow direction of the coil 03. When the first contact is closed and the coil 03 is electrified with forward current, the magnetic pole direction generated by the coil 03 is the same as that of the permanent magnet 23, the permanent magnet 23 and the coil 03 are pushed by magnetic force to generate repulsion motion, and the rejecting finger 02 is driven to stretch out; when the second contact is closed and the coil 03 is connected with a reverse current, when the magnetic pole direction generated by the coil 03 is opposite to the magnetic pole direction of the permanent magnet 23, the permanent magnet 23 and the coil 03 are pushed by magnetic force to move in opposite directions, and the finger 02 is driven to retract.

The finger 02 is rejected in the embodiment of the application, the extension and retraction are driven by magnetic force, the influence of contact friction force is avoided, the rapid extension and retraction can be realized, the action period is shortened, and the action precision and controllability are improved.

In one embodiment, the control unit is a Programmable Logic Controller (PLC), and the first contact and the second contact can be set as normally open contacts on the PLC; the normally open contact of the PLC can be externally connected with a coil of an intermediate relay, and the normally open contact of the intermediate relay is used as a first contact and a second contact; one of the connection modes is selected according to actual requirements.

According to a preset program, when an unqualified product is detected, the PLC selects to switch on a first contact or a second contact of one coil 03, and triggers the rejecting finger 02 to retract after extending out, so that the unqualified product is rejected.

In one embodiment, as shown in fig. 1, a varistor 05 is also connected in series between each coil 03 and the power source 04.

Specifically, the magnitude of the current determines the magnitude of the force between the coil 03 and the permanent magnet 23, and according to the mechanical principle, the magnitude of the force determines the magnitude of the acceleration when the permanent magnet 23 moves while the time for which the force is applied is constant, and the magnitude of the acceleration determines the speed at which the permanent magnet 23 moves while the time for which the force is applied is constant. The propagation speed of electricity and magnetism is the same as the speed of light, so the moving speed of the rejection finger 02 is basically only related to the switching speed of the PLC output switch and the magnitude of the current in the coil 03 (and the switching speed of the intermediate relay if present). The scanning period of the PLC program is slightly different according to the size of the program, the number of simple program steps of the removing mechanism is basically not more than 1000 steps, the scanning period of the PLC can reach below 10 milliseconds, therefore, the switching speed of a PLC switch can be ignored in the device, and the output capacity of the power source 04 is the key for determining the movement speed and the output force of the removing finger 02.

According to the embodiment of the application, the rheostat 05 is connected between the coil 03 and the power source 04 in series, and the movement speed and the output force required by the fingers 02 can be adjusted differently by adjusting the resistance value of the rheostat 05.

In one embodiment, as shown in fig. 2, at least one guide rail 11 is installed in the housing 01, and each rejecting finger 02 is slidably installed on one guide rail 11;

the coil 03 is electrified to drive the rejecting finger 02 to slide along the guide rail 11.

Specifically, the guide rail 11 is fixedly installed at the bottom of the housing 01, the slidable sliding seat 12 is arranged on the guide rail 11, the removing finger 02 is fixed on the sliding seat 12 through the fastening bolt 25, and when the removing finger 02 extends and retracts, the sliding seat 12 is driven to slide along the guide rail 11 to provide extension and retraction guide for the removing finger 02.

The sliding seat 12 and the guide rail 11 are in rolling friction, so that the sliding seat 12 can move at a high speed, rolling friction impact is small, few debris are generated by friction, and the service life of equipment can be effectively prolonged.

As shown in fig. 3, the removing finger 02 includes a removing guide bar 21, a guide bar 22, a mounting screw 24, and a permanent magnet 23;

the guide rod 22 is connected to the rear end of the rejection guide rod 21, the permanent magnet 23 is sleeved at the rear end of the guide rod 22, and the mounting screw 24 is screwed in from the rear end of the guide rod 22 to fix the permanent magnet 23.

The rejecting guide rod 21 serves as the front end of the rejecting finger 02 and is used for extending out and pushing rejected unqualified products; the permanent magnet 23 is used as the rear end of the removing finger 02 and is used for extending into the coil 03 to generate driving force; the guide rod 22 is used for connecting the rejection guide rod 21 and the permanent magnet 23.

Specifically, the front end of the guide rod 22 is provided with a through hole 221, the front end of the guide rod 22 is inserted into the rear end of the rejection guide rod 21, and the spring positioning pin 211 penetrates through the rejection guide rod 21 and the through hole 221 along a direction perpendicular to the guide rod 22 to connect the guide rod 22 and the rejection guide rod 21.

The rear end of the guide rod 22 is provided with a mounting column 222, the diameter of the mounting column 222 is smaller than that of the guide rod body, the coil 03 is sleeved on the mounting column 222, a mounting screw 24 is screwed into the rear end of the mounting column 222 to fix the permanent magnet 23, and preferably, a gasket 26 is further padded between the permanent magnet 23 and the mounting screw 24.

In one embodiment, as shown in fig. 2, the case 01 includes a bottom case and a front cover plate 13 and a rear cover plate 14 installed above the bottom case;

the rejecting finger 02 is provided with a raised limiting block 212, and the limiting block 212 moves between the front cover plate 13 and the rear cover plate 14 along with the extension and retraction of the rejecting finger 02.

Specifically, the bottom case includes a bottom plate and two side plates 16 vertically connected to both sides of the bottom plate 15, a front cover plate 13 is disposed over front ends of the two side plates 16, and a rear cover plate 14 is disposed over rear ends of the two side plates 16. The front cover plate 13 and the rear cover plate 14 are located on the same plane, and a movable space is reserved between the front cover plate 13 and the rear cover plate 14.

The guide rail 15 is installed on the bottom plate 15 in parallel to the length direction of the side plate 16, and the removing finger 02 is installed on the guide rail 15. The limiting block 212 protrudes from the upper part of the removing guide rod 21 for removing the fingers 02 and extends out of the moving space between the front cover plate 13 and the rear cover plate 14, and along with the extension and retraction of the removing fingers 02, the limiting block 212 moves between the front cover plate 13 and the rear cover plate 14 to limit the extension and retraction of the removing fingers 02.

In one embodiment, as shown in fig. 1 and 2, a first cushion 17 is mounted to the rear end of the front cover plate 13, and a second cushion 18 is mounted to the front end of the rear cover plate 14.

Specifically, the first cushion pad 17 and the second cushion pad 18 are both polyurethane cushion pads, the first cushion pad 17 is mounted on the front cover plate 13 by bolts, and the second cushion pad 18 is mounted on the rear cover plate 14 by bolts.

The first cushion pad 17 and the second cushion pad 18 are arranged in the embodiment, so that kinetic energy of the high-speed movement of the limiting block 212 can be effectively absorbed, and the impact on the front cover plate 13 and the rear cover plate 14 is reduced.

In one embodiment, as shown in fig. 1 and 2, the side plate 16 is connected with the front cover plate 13 and the rear cover plate 14 through a metal key 19 and a connecting bolt 110;

each side plate 16 is provided with a first groove (not shown), two sides of the front cover plate 13 are respectively provided with a front groove 131 corresponding to the first groove, the first groove and the front groove 131 are oppositely arranged to form a first mounting groove (not shown), a metal key 19 is clamped in the first mounting groove, and the connecting bolt 110 sequentially penetrates through the front cover plate 13 and the metal key 19 and then is screwed into the side plate 16;

each side plate 16 is provided with a second groove 161, two sides of the rear cover plate 14 are respectively provided with a rear groove 141 corresponding to the second groove 161, the second grooves 161 and the rear grooves 141 are oppositely arranged to form second mounting grooves (not shown), the metal keys 19 are clamped in the second mounting grooves, and the connecting bolts 110 sequentially penetrate through the rear cover plate 14 and the metal keys 19 and then are screwed into the side plates 16.

In the embodiment, the connection mode of the front cover plate 13 and the side plate 16 is the same as that of the rear cover plate 14 and the side plate 16, and the two have the same technical effect. The technical effect of the connection structure of the present embodiment is analyzed by taking the front cover plate 13 as an example as follows:

metal key 19 inlays in first mounting groove, metal key 19 and first mounting groove transition fit, first mounting groove is formed by first recess and the relative setting of preceding recess 131, the round hole has been seted up on the metal key 19, the screw has also been seted up to the corresponding position of protecgulum 13 and curb plate 16, connecting bolt 110 passes protecgulum 13 in proper order, screw in the screw of curb plate 16 behind the metal key 19, both fixed metal key 19, also make metal key 19 can resist the tangential force between protecgulum 13 and the curb plate 16 when rejecting finger 02 is flexible, guarantee the connection stability between protecgulum 13 and the curb plate 16.

According to the needs, the above technical schemes can be combined to achieve the best technical effect.

What has been described is merely illustrative of the principles and preferred embodiments of the present application. It should be noted that, for those skilled in the art, the embodiments obtained by appropriately combining the technical solutions respectively disclosed in the different embodiments are also included in the technical scope of the present invention, and several other modifications may be made on the basis of the principle of the present application and should also be regarded as the protective scope of the present application.

Claims

1. A quick removing mechanism is characterized by comprising a shell, removing fingers, a coil, a control unit and a power supply;

at least one rejecting finger is telescopically arranged in the shell, each rejecting finger is provided with a permanent magnet, and each permanent magnet is sleeved with one coil;

2. The quick-removal mechanism according to claim 1, wherein the power supply comprises a forward direct current power supply and a reverse direct current power supply, and the control unit comprises at least one first contact and at least one second contact;

3. The rapid removal mechanism of claim 2, wherein the control unit is a programmable logic controller.

4. The quick reject mechanism according to any one of claims 1 to 3, wherein a varistor is further connected in series between each coil and the power supply.

5. The quick removal mechanism according to any one of claims 1 to 3, wherein at least one guide rail is mounted in the housing, each removal finger being slidably mounted on one of the guide rails;

6. The quick reject mechanism according to any one of claims 1 to 3, wherein the reject fingers comprise a reject guide bar, a mounting screw and the permanent magnet;

7. The quick removal mechanism according to claim 5, wherein the housing comprises a bottom shell and a front cover plate and a rear cover plate mounted over the bottom shell;

the rejecting finger is provided with a raised limiting block, and along with the telescoping of the rejecting finger, the limiting block moves between the front cover plate and the rear cover plate.

8. The mechanism of claim 7, wherein the front cover plate has a first cushion mounted to a rear end thereof and a second cushion mounted to a front end thereof.

9. The quick removing mechanism as claimed in claim 7, wherein said bottom shell comprises a bottom plate and two side plates vertically connected to two sides of said bottom plate, said front cover plate is covered over the front ends of said two side plates, and said rear cover plate is covered over the rear ends of said two side plates;

10. The quick removal mechanism according to claim 9, wherein the side plates are connected with the front cover plate and the rear cover plate through metal keys and connecting bolts;

each side plate is provided with a second groove, two sides of the rear cover plate are respectively provided with a rear groove corresponding to the second groove, the second grooves and the rear grooves are oppositely arranged to form second mounting grooves, the metal keys are clamped in the second mounting grooves, and the connecting bolts sequentially penetrate through the rear cover plate and the metal keys and then are screwed into the side plates.