CN214043457U

CN214043457U - Limit switch

Info

Publication number: CN214043457U
Application number: CN202023139934.3U
Authority: CN
Inventors: 陈志强
Original assignee: Wenzhou Coze Lifting Electrical Appliance Co ltd
Current assignee: Wenzhou Coze Lifting Electrical Appliance Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-24
Anticipated expiration: 2030-12-24

Abstract

A limit switch. The method is characterized in that: the switch group comprises a plurality of switch modules which are sequentially arranged in parallel from front to back, and each switch module comprises a base, and a cam, a wiring terminal, a static contact, a contact support, a moving contact and an elastic element which are arranged in the base; the rotating shaft sequentially extends into the bases of all the switch modules from front to back and is connected with the cam, the wiring terminals are connected with the static contacts and are arranged on two sides of the bases, the contact supports are arranged between the two static contacts and are in up-and-down sliding fit with the bases, the moving contacts are transversely arranged on the contact supports, two ends of each moving contact correspond to the two static contacts respectively, and the elastic pieces can drive the contact supports to be abutted to the cam. Its advantage lies in, adopts above-mentioned scheme, sets up switch assembly from a plurality of switch module that parallel, and during production assembly, each switch module can independently assemble, then overlaps one by one and establish in the pivot, not only makes overall structure more simple, simplifies the equipment operation moreover greatly, reduce cost.

Description

Limit switch

Technical Field

The utility model relates to an electrical apparatus switch technical field, concretely relates to limit switch.

Background

The AC limit switch is used in the power supply loop of the construction elevator used in the construction site under 380V (440V) AC voltage, and when the elevator goes wrong, the switch cuts off the main power supply of the elevator, so as to protect the construction elevator.

The existing common limit switch, such as the JK16-100 ac limit switch, and the limit switch disclosed in the chinese utility model patent with the grant publication number CN204324843U, has a complicated structure, troublesome assembly operation and high cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiency of the background art, the utility model provides a limit switch.

The utility model discloses the technical scheme who adopts: a limit switch comprises an operating component and a switch component, wherein the operating component is arranged on the front side of the switch component and at least comprises a rotating shaft; the switch assembly comprises a plurality of switch modules which are sequentially arranged in parallel from front to back, and each switch module comprises a base, and a cam, a wiring terminal, a static contact, a contact support, a moving contact and a first elastic piece which are arranged in the base; the rotating shaft sequentially extends into the bases of all the switch modules from front to back and is connected with the cam, the wiring terminal is connected with the static contacts and is arranged on two sides of the base, the contact support is arranged between the two static contacts and is matched with the base in a vertically sliding mode, the moving contact is transversely arranged on the contact support, two ends of the moving contact correspond to the two static contacts respectively, and the elastic piece can drive the contact support to abut against the cam.

A first cavity used for installing a cam is formed in the middle of the base, a second cavity used for installing the contact support and the moving contact is arranged above the first cavity, and third cavities used for installing the wiring terminals are arranged on two sides of the second cavity.

The base rear side opening sets up, just the rear end of switch module is equipped with the back lid.

A first sliding groove which is longitudinally arranged is formed in the inner side wall of the base, a second sliding groove which is longitudinally arranged is correspondingly formed in the outer side wall of the base, and a third sliding groove which is longitudinally arranged is formed on the rear cover; the front side of the contact support is arranged in the first sliding groove, and the rear side of the contact support is arranged in the second sliding groove or the third sliding groove.

The upper end of the contact support is provided with a groove, two sides of the middle of the moving contact are provided with gaps, and the middle section of the moving contact is embedded into the groove and is in limit fit with the contact support; the first elastic element is a spring, the upper end of the first elastic element is abutted against the base, the lower end of the first elastic element is abutted against the moving contact, and the moving contact can be driven to be in contact with the contact support.

And a positioning bulge matched with the first elastic element is formed on the upper end surface of the middle part of the moving contact.

The operating assembly further comprises a shell, a positioning cam and a positioning rod, the shell is fixed at the front end of the switch assembly, the positioning cam is fixedly installed in the rotating shaft, a plurality of groups of positioning grooves are symmetrically arranged in the circumferential direction of the positioning cam, the positioning rod is matched with the shell in a sliding mode, and a second elastic piece which is used for driving the positioning cam to contact with is connected to the positioning rod.

The rotating shaft is a square shaft, and the centers of the positioning cam and the cam are provided with center holes capable of being limited with the rotating shaft in the circumferential direction; the positioning cam is in rotating fit with the shell.

The end part of the positioning rod is provided with a roller which is matched with the positioning cam in a rolling and sliding manner.

The utility model has the advantages that: by adopting the scheme, the switch assembly is arranged from a plurality of parallel switch modules, and during production and assembly, each switch module can be independently assembled and then sleeved on the rotating shaft one by one, so that the whole structure is simpler, the assembly operation is greatly simplified, and the cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a limit switch according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a limit switch according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram 1 of a switch module according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram 2 of a switch module according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the limit switch according to the embodiment of the present invention after the housing is hidden.

Fig. 6 is a schematic structural diagram 1 of an operation assembly according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram 2 of an operation assembly according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a rear cover according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in the figure, a limit switch, including operating means 1, switch module 2, operating means 1 sets up in switch module 2's front side, and it includes a pivot 11 at least, 11 one end of pivot stretches into switch module 2 and switch module linkage cooperation, and other end tip then can connect and can order about its rotatory power supply, and 11 rotations of pivot can realize switch module's intercommunication or disconnection.

The switch assembly 2 comprises a plurality of switch modules which are sequentially arranged in parallel from front to back, and each switch module comprises a base 21, and a cam 22, a wiring terminal 23, a static contact 24, a contact support 25, a movable contact 26 and a first elastic element 27 which are arranged in the base 21.

The base 21 has a plurality of mounting chambers formed therein for corresponding mounting of the components, a first chamber 211 is formed in the middle thereof, a second chamber 212 is disposed above the first chamber 211, and third chambers 213 are disposed on both sides of the second chamber 212.

The cam 22 is installed in the first chamber 211 and is fixedly installed on the rotating shaft 11, wherein the rotating shaft 11 is a square shaft, the center of the cam 22 is provided with a central hole capable of being circumferentially limited with the rotating shaft 11, so that the cam 22 can rotate synchronously with the rotating shaft 11, the connection terminals 23 are installed in the third chamber 213 respectively, each connection terminal comprises a connection frame and a connection screw, and a connection frame type connection terminal is very convenient to connect, one end of each static contact 24 is fixedly connected with the connection terminal 23, the other end of each static contact extends into the second chamber 212, the contact support 25 is slidably arranged in the second chamber 212 up and down and is located between the two static contacts 24, the movable contact 26 is transversely arranged on the contact support 25, the two ends of each movable contact correspond to the two static contacts 24, and the first elastic piece 27 is of a spring structure and can drive the lower end of the contact support 25 to abut against the cam 22.

When the rotating shaft 11 rotates, the cam 22 can be driven to rotate synchronously, and the contact support 25 can slide up and down along the base 21 under the action of the cam 22 and the first elastic element 27, so that the moving contact 25 can be driven to move up and down to realize on-off connection with the static contact 24.

Above-mentioned limit switch sets up switch module 2 from a plurality of switch module that parallel, and during production assembly, each switch module can independently assemble, then overlaps one by one and establish on pivot 11, not only makes overall structure more simple, simplifies the equipment operation moreover greatly, reduce cost.

Base 21 sets to the open-ended structure in rear side, and each spare part in the base 21 is gone into from the rear side dress, and simultaneously when whole equipment, sheathes each switch module in proper order backward in the past on pivot 11, and it is more simple and convenient to operate, and the opening of front side base is sealed by direct rear side base in addition the rear end of switch module 2 is equipped with back lid 3 to seal last switch module's base opening.

Further, a first sliding groove 214 is formed in the inner side wall of the base 21, a second sliding groove 215 is correspondingly formed in the outer side wall of the base 21, and a third sliding groove 31 is formed in the rear cover 3; the front side of the contact support 25 is arranged in the first sliding groove 214, the rear side is arranged in the second sliding groove 215, and certainly, the contact support of the last switch module is matched with the third sliding groove 31, so that the front and the rear of the contact support 25 are positioned, and the stable and reliable action of the contact support 25 during the up-and-down sliding is ensured.

The upper end of the contact support 25 is provided with a groove 251, two sides of the middle of the moving contact 26 are provided with notches 261, and the middle section of the moving contact 26 is embedded into the groove 251 to be in limit fit with the contact support 25; the upper end of the first elastic element 27 abuts against the base 21, and the lower end of the first elastic element directly abuts against the movable contact 26, so that the movable contact 26 can be driven to keep in contact with the contact support 25, the connection structure between the movable contact 26 and the contact support 25 is simple, and the whole assembly operation can be further simplified.

In order to ensure that the first elastic element 27 is structurally stable and does not deflect, a positioning protrusion 262 matched with the first elastic element 27 can be further formed on the upper end surface of the middle part of the movable contact 26.

In order to reduce the mutual abrasion between the contact support 25 and the cam 22, the lower end of the contact support 25 can be provided with a smooth arc surface to reduce the friction.

As shown in the figure, the operating assembly 1 further includes a housing 12, a positioning cam 13, a positioning rod 14, and a second elastic member 15, the housing 12 is fixed at the front end of the switch assembly 2, the positioning cam 13 is rotatably installed in the housing 12, and a central hole capable of circumferentially limiting with the rotating shaft 11 is formed in the positioning cam 13, so that the rotating shaft 11 is rotatably supported on the housing 12 through the positioning cam 13, a plurality of groups of symmetrically arranged positioning slots 131 are formed in the outer circumference of the positioning cam 13, the positioning rod 14 is slidably arranged in the housing 12 and connected to the second elastic member 15, the second elastic member 15 is also a spring, which can drive the positioning rod 14 to contact with the positioning cam 13, the rotating shaft 11 can drive the positioning boss 13 to synchronously rotate, the positioning boss 13 is mutually matched with the positioning rod 14 through the positioning slots 131, and can keep the limit switch in a designated position state, more stable and reliable.

Further, the end part of the positioning rod 14 is provided with a roller 16, and the roller 16 is in rolling sliding fit with the positioning cam 13, so that friction and wear are reduced.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A limit switch comprises an operating component (1) and a switch component (2), wherein the operating component (1) is arranged on the front side of the switch component (2) and at least comprises a rotating shaft (11); the method is characterized in that: the switch assembly (2) comprises a plurality of switch modules which are sequentially arranged in parallel from front to back, and each switch module comprises a base (21), and a cam (22), a wiring terminal (23), a static contact (24), a contact support (25), a movable contact (26) and a first elastic piece (27) which are arranged in the base (21);

the rotating shaft (11) sequentially extends into the bases (21) of all the switch modules from front to back and is connected with the cam (22), the wiring terminal (23) is connected with the static contacts (24) and is arranged on two sides of the base (21), the contact support (25) is arranged between the two static contacts (24) and is in up-and-down sliding fit with the base (21), the movable contact (26) is transversely arranged on the contact support (25), two ends of the movable contact correspond to the two static contacts (24), and the elastic piece (27) can drive the contact support (25) to be abutted to the cam (22).

2. A limit switch as claimed in claim 1, characterized in that: a first cavity (211) used for installing a cam (22) is formed in the middle of the base (21), a second cavity (212) used for installing the contact support (25) and the moving contact (26) is arranged above the first cavity (211), and third cavities (213) used for installing the wiring terminals (23) are arranged on two sides of the second cavity (212).

3. A limit switch as claimed in claim 1, characterized in that: the base (21) rear end opening sets up, just the rear end of switch module (2) is equipped with back lid (3).

4. A limit switch as claimed in claim 3, characterized in that: a first sliding groove (214) which is longitudinally arranged is formed in the inner side wall of the base (21), a second sliding groove (215) which is longitudinally arranged is correspondingly formed in the outer side wall of the base (21), and a third sliding groove (31) which is longitudinally arranged is formed in the rear cover (3); the front side of the contact support (25) is arranged in the first sliding groove (214), and the rear side is arranged in the second sliding groove (215) or the third sliding groove (31).

5. A limit switch as claimed in claim 1, characterized in that: a groove (251) is formed in the upper end of the contact support (25), notches (261) are formed in two sides of the middle of the moving contact (26), and the middle section of the moving contact (26) is embedded into the groove (251) to be in limit fit with the contact support (25); the first elastic element (27) is a spring, the upper end of the first elastic element is abutted against the base (21), the lower end of the first elastic element is abutted against the movable contact (26), and the movable contact (26) can be driven to keep contact with the contact support (25).

6. A limit switch as claimed in claim 5, characterized in that: and a positioning bulge (262) matched with the first elastic element (27) is formed on the upper end surface of the middle part of the movable contact (26).

7. A limit switch as claimed in claim 1, characterized in that: the operating assembly (1) further comprises a shell (12), a positioning cam (13) and a positioning rod (14), the shell (12) is fixed at the front end of the switch assembly (2), the positioning cam (13) is fixedly installed on the rotating shaft (11), a plurality of groups of positioning grooves (131) are symmetrically arranged in the circumferential direction of the positioning cam, the positioning rod (14) is in sliding fit with the shell (12), and is connected with a second elastic piece (15) which drives the positioning cam to contact with the positioning cam (13).

8. The limit switch of claim 7, wherein: the rotating shaft (11) is a square shaft, and the centers of the positioning cam (13) and the cam (22) are respectively provided with a central hole capable of being limited with the rotating shaft (11) in the circumferential direction; the positioning cam (13) is in rotating fit with the shell (12).

9. The limit switch of claim 7, wherein: the end part of the positioning rod (14) is provided with a roller (16), and the roller (16) is matched with the positioning cam (13) in a rolling and sliding manner.