CN210039968U

CN210039968U - Contact limit switch

Info

Publication number: CN210039968U
Application number: CN201920919564.3U
Authority: CN
Inventors: 顾建峰
Original assignee: New Spring Instrument Changshu Co Ltd
Current assignee: New Spring Instrument Changshu Co Ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-02-07
Anticipated expiration: 2029-06-19

Abstract

The utility model relates to the technical field of limit switches, and discloses a contact limit switch, which comprises a shell, wherein a push rod, a limit plate, a reset spring, a normally closed contact, a normally open contact, a circuit interface, a positioning device and a contact bridge are arranged inside the shell; reset groove and fixed slot have been seted up to the inside of casing, the one end of push rod extends to the inside of casing and runs through reset groove and fixed slot from the top of casing, and is sliding connection between push rod and the casing. This contact limit switch, positioner press from both sides tightly the bridge of touching through movable plate and fixed plate to utilize the bolt to fix movable plate, fixed plate and touch the bridge three and be one, thereby make touch the bridge and fix on the push rod, consequently only need dismantle the bolt, alright take off and touch the bridge and change, avoid limit switch to abandon because of touching the bridge damage, thereby reduce the cost.

Description

Contact limit switch

Technical Field

The utility model relates to a limit switch technical field specifically is a contact limit switch.

Background

The limit switch is also called a travel switch, and can be installed on a relatively static object or a moving object, when an animal approaches to the static object, a connecting rod of the switch drives a contact of the switch to cause the disconnection of the closed contact or the closing of the disconnected contact, the control circuit and the motor are controlled by the change of the on-off state of the switch contact, the limit switch has contact type and non-contact type, the contact type is more intuitive, the travel switch is installed on a moving part of mechanical equipment, a limit stop at a limit position or an opposite installation position is installed on a fixed point of the relative movement of the travel switch, when a mechanical contact of the travel switch touches the limit stop, the control circuit is cut off (or changed), and the machine stops or changes the operation.

The existing limit switch causes the disconnection and the closing of a contact point through a connecting rod, so that circuit control is achieved, however, the contact bridge of the contact point is abraded due to long-time use, electric arcs can be generated due to the disconnection and the closing of the contact bridge and the contact point, the abrasion to the contact bridge is increased, the contact bridge is damaged, and the use is influenced, and therefore the contact limit switch is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a contact limit switch possesses the advantage that touches the bridge and be convenient for change, has solved the long-time use of current limit switch and can make the contact bridge of contact point wearing and tearing appear, and touches the bridge and can produce electric arc with the disconnection and the closure of contact point to the increase leads to touching the bridge and damages, influences the problem of use to touching the wearing and tearing of bridge.

The utility model provides a following technical scheme: a contact type limit switch comprises a shell, wherein a push rod, a limit plate, a reset spring, a normally closed contact, a normally open contact, a circuit interface, a positioning device and a contact bridge are arranged inside the shell;

the shell is internally provided with a reset groove and a fixed groove, one end of the push rod extends from the top of the shell to the inside of the shell and penetrates through the reset groove and the fixed groove, the push rod is in sliding connection with the shell, the limiting plate and the reset spring are arranged on the push rod positioned in the reset groove, the limiting plate is fixedly arranged on the surface of the push rod, and the reset spring is movably sleeved on the surface of the push rod;

normally closed contact and normally open contact set up two, and distribute at the both ends of fixed slot inner wall, and the circuit interface sets up four and inlays in the inside of casing, and through the circuit intercommunication between normally closed contact and the normally open contact and the circuit interface, touch bridge and positioner and all set up on the push rod that is located the fixed slot inside.

Preferably, the middle part of the contact bridge is provided with a groove, the middle part of the contact bridge is clamped on the push rod through the groove, and the surface of the contact bridge is provided with a hole.

Preferably, the positioning device is composed of a fixed plate, a movable plate and a bolt, the fixed plate is fixedly installed on the surface of the push rod, the movable plate is sleeved on the surface of the push rod in a sliding mode, the contact bridge is arranged between the fixed plate and the movable plate, two groups of holes are formed in the surfaces of the fixed plate and the movable plate, the bolt is arranged on the holes of the fixed plate and the movable plate, and one end of the bolt penetrates through the hole in the contact bridge.

Preferably, the contact bridge is made of copper.

Preferably, the moving plate is provided with a rubber layer at the contact side of the contact bridge.

Compared with the prior art, the utility model discloses possess following beneficial effect:

this contact limit switch, the removal through the push rod drives the bridge of touching on it and removes, make touch bridge and normally closed contact and normally open contact, and utilize reset spring to reset the push rod, thereby the state of opening and shutting of control switch, and the circuit is with normally closed contact and normally open contact and circuit interface connection, thereby the circuit of being convenient for is connected, use, positioner presss from both sides tightly touching the bridge through movable plate and fixed plate, and utilize the bolt with the movable plate, the fixed plate is fixed together with touching the bridge three, thereby make to touch the bridge and fix on the push rod, consequently, only need dismantle the bolt, alright take off and touch the bridge and change, avoid limit switch to abandon because of touching the bridge damage, thereby reduce the cost.

Drawings

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

FIG. 2 is a schematic structural view of the contact bridge of the present invention;

fig. 3 is a schematic structural diagram of the fixing plate of the present invention.

In the figure: 1. a housing; 2. a push rod; 3. a limiting plate; 4. a return spring; 5. a normally closed contact; 6. a normally open contact; 7. a line; 8. a circuit interface; 9. a positioning device; 91. a fixing plate; 92. moving the plate; 93. a bolt; 10. contacting the bridge; 11. a reset groove; 12. and fixing the grooves.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect.

To maintain the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known components are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1-3, a contact limit switch includes a housing 1, a push rod 2, a limit plate 3, a return spring 4, a normally closed contact 5, a normally open contact 6, a circuit 7, a circuit interface 8, a positioning device 9, and a contact bridge 10 are disposed inside the housing 1;

a reset groove 11 and a fixing groove 12 are formed in the shell 1, one end of the push rod 2 extends from the top of the shell 1 to the inside of the shell 1 and penetrates through the reset groove 11 and the fixing groove 12, the push rod 2 and the shell 1 are in sliding connection, the limiting plate 3 and the reset spring 4 are arranged on the push rod 2 located in the reset groove 11, the limiting plate 3 is fixedly installed on the surface of the push rod 2, and the reset spring 4 is movably sleeved on the surface of the push rod 2;

normally closed contact 5 and normally open contact 6 set up two, and distribute at the both ends of fixed slot 12 inner wall, and circuit interface 8 sets up four and inlays in casing 1's inside, and communicate through circuit 7 between normally closed contact 5 and normally open contact 6 and the circuit interface 8, touch bridge 10 and positioner 9 and all set up on being located the inside push rod 2 of fixed slot 12, it removes to touch bridge 10 to drive it through the removal of push rod 2, make and touch bridge 10 and normally closed contact 5 and the contact of normally open contact 6, and utilize reset spring 4 to reset push rod 2, so that thereby control switch's the state of opening and shutting, and circuit 7 is connected normally closed contact 5 and normally open contact 6 and circuit interface 8, thereby be convenient for the circuit is connected, use.

In an alternative embodiment, a groove is formed in the middle of the contact bridge 10, the middle of the contact bridge 10 is clamped on the push rod 2 through the groove, and a hole is formed in the surface of the contact bridge 10.

In an alternative embodiment, the positioning device 9 is composed of a fixed plate 91, a movable plate 92 and a bolt 93, the fixed plate 91 is fixedly installed on the surface of the push rod 2, the movable plate 92 is slidably sleeved on the surface of the push rod 2, the contact bridge 10 is arranged between the fixed plate 91 and the movable plate 92, two sets of holes are formed in the surfaces of the fixed plate 91 and the movable plate 92, the bolt 93 is arranged on the holes of the fixed plate 91 and the movable plate 92, one end of the bolt 93 penetrates through the hole in the contact bridge 10, the positioning device 9 clamps the contact bridge 10 through the movable plate 92 and the fixed plate 91, and the movable plate 92, the fixed plate 91 and the contact bridge 10 are fixed together by the bolt 93, so that the contact bridge 10 is fixed on the push rod 2, and therefore only the bolt 93 needs to be detached, the contact bridge 10 can be taken down for replacement, the limit switch is.

In an alternative embodiment, the contact bridge 10 is made of copper, which has good electrical conductivity to facilitate conducting current therethrough.

In an alternative embodiment, the moving plate 92 is provided with a rubber layer on the contact side of the contact bridge 10, and the rubber layer is in contact with the contact bridge 10, so that the compression of the fixed plate 91 and the moving plate 92 on the contact bridge 10 caused by the bolts 93 is reduced, and the contact bridge 10 is prevented from being deformed.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A contact limit switch, includes casing (1), its characterized in that: a push rod (2), a limiting plate (3), a reset spring (4), a normally closed contact (5), a normally open contact (6), a circuit (7), a circuit interface (8), a positioning device (9) and a contact bridge (10) are arranged in the shell (1);

a reset groove (11) and a fixing groove (12) are formed in the shell (1), one end of the push rod (2) extends to the inside of the shell (1) from the top of the shell (1) and penetrates through the reset groove (11) and the fixing groove (12), the push rod (2) is in sliding connection with the shell (1), the limiting plate (3) and the reset spring (4) are arranged on the push rod (2) located in the reset groove (11), the limiting plate (3) is fixedly installed on the surface of the push rod (2), and the reset spring (4) is movably sleeved on the surface of the push rod (2);

normally closed contact (5) and normally open contact (6) set up two, and distribute at the both ends of fixed slot (12) inner wall, and circuit interface (8) set up four and inlay in the inside of casing (1), and communicate through circuit (7) between normally closed contact (5) and normally open contact (6) and circuit interface (8), touch bridge (10) and positioner (9) and all set up on push rod (2) that are located fixed slot (12) inside.

2. A contact limit switch as defined in claim 1, wherein: the middle of the contact bridge (10) is provided with a groove, the middle of the contact bridge (10) is clamped on the push rod (2) through the groove, and the surface of the contact bridge (10) is provided with a hole.

3. A contact limit switch as defined in claim 1, wherein: positioner (9) comprise fixed plate (91), movable plate (92) and bolt (93), fixed plate (91) fixed mounting is on the surface of push rod (2), movable plate (92) slip cup joint the surface at push rod (2), touch bridge (10) and set up between fixed plate (91) and movable plate (92), and the surface of fixed plate (91) and movable plate (92) all is provided with two sets of holes, and bolt (93) set up on the hole of fixed plate (91) and movable plate (92), the one end of bolt (93) is passed and is touched bridge (10) upper hole.

4. A contact limit switch as defined in claim 1, wherein: the contact bridge (10) is made of copper.

5. A contact limit switch as defined in claim 3, wherein: the moving plate (92) is provided with a rubber layer at the contact side of the contact bridge (10).