CN115274325A

CN115274325A - Sealed large-stroke switch

Info

Publication number: CN115274325A
Application number: CN202210927303.2A
Authority: CN
Inventors: 吴共泽; 李贤富; 侯星舟; 姚虔伦; 潘成明; 凯林章; 程勇; 杨明辉; 陆文平; 杨胜利; 徐浪; 姜邹
Original assignee: Guizhou Zhenhua Hualian Electronics Co ltd
Current assignee: Guizhou Zhenhua Hualian Electronics Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-11-01

Abstract

The invention provides a sealed large-stroke switch which comprises an external force transmission mechanism, wherein the front end of the external force transmission mechanism is in threaded connection with an electrical interface structure, a static contact system and a movable contact system are installed in the external force transmission mechanism, the static contact system and the movable contact system can contact to open and close a circuit, the static contact system is connected with an outgoing line through a lead and a fixed seat, and the fixed seat is fixed at the front end of the electrical interface structure; a first sealing ring is arranged between the external force transmission mechanism and the electric interface structure. The invention has high integration, multiple functions, good vibration resistance, acceleration resistance and impact resistance, can bear high random vibration magnitude, high acceleration magnitude and high impact magnitude from multiple degrees of freedom under long-term pressing or free state and always keeps reliable and stable contact; the electric connector is used as an external leading-out interface, has a function of preventing wrong insertion, and can improve the reliability of signal transmission compared with the lead leading-out; both static and dynamic sealing can be achieved.

Description

Sealed large-stroke switch

Technical Field

The invention relates to a sealed large-stroke switch.

Background

The switch belongs to an electromechanical element, is driven by an external actuating mechanism, realizes the conversion of the switch when being pressed to a specified stroke, namely realizes the connection or disconnection of a switch circuit, is an electromechanical element for realizing automatic control, and is widely applied to important mechanical equipment on land, on the sky, under water and the like. The switch is suitable for manual operation of a control panel, and is also suitable for the occasions of mechanical automatic control systems, such as a service panel of certain mechanical equipment and a mechanical automatic maintenance system of certain engines. With the rapid development of mechanical equipment in various industries, particularly the maintenance of equipment, increasingly high requirements are put forward on the integrated multifunctional application of the switch.

At present, the traditional travel switch does not have the integrated functions of manual operation control and mechanical automatic control, cannot meet the requirement that mechanisms in special fields need to simultaneously perform manual operation control and mechanical automatic control, and increases the cost for the use of equipment.

Disclosure of Invention

In order to solve the technical problems, the invention provides the large-stroke sealing switch which is high in integration, integrated and multipurpose, good in vibration resistance, acceleration resistance and impact resistance and capable of effectively meeting special requirements of mechanisms in special fields.

The invention is realized by the following technical scheme.

The invention provides a sealed large-stroke switch which comprises an external force transmission mechanism, wherein the front end of the external force transmission mechanism is in threaded connection with an electrical interface structure, a static contact system and a movable contact system are installed in the external force transmission mechanism, the static contact system and the movable contact system can contact to open and close a circuit, the static contact system is connected with an outgoing line through a lead and a fixed seat, and the fixed seat is fixed at the front end of the electrical interface structure; a first sealing ring is arranged between the external force transmission mechanism and the electric interface structure.

External force transmission mechanism comprises pressing handle and mount pad, penetrates from the mount pad rear end according to the handle, and the mount pad front end is fixed with the uide bushing, and quiet contact system installs on the uide bushing, moves contact system and installs at pressing the handle front end.

The opening at the side of the rear end of the mounting seat is provided with a locking pin, and the inner end of the locking pin is opposite to the pressing handle and can lock the pressing handle.

The outer end of the locking pin is provided with a nut; the locking pin is fixed on the pressing block through threads, and the pressing block is fixed on the mounting seat; the front end of the locking pin is provided with a first pressure spring.

And a second pressure spring is arranged in the mounting seat and is arranged between the guide sleeve and the pressing handle.

And a cushion block is arranged between the second pressure spring and the guide sleeve and is fixed on the mounting seat.

The static contact system is composed of a supporting seat, a plurality of conducting strips penetrate through the supporting seat, the inner ends of the conducting strips are connected with fixed supporting sheets, and contact sheets are fixed on the supporting sheets.

The conducting strips are circumferentially and uniformly distributed.

The movable contact system is composed of a push rod, an inner insulating bush is sleeved outside the front portion of the push rod, a movable contact ring is arranged at the front end of the inner insulating bush, the outer insulating bush is sleeved and fixed on the push rod, and a nut is arranged at the front end of the push rod and used for limiting the outer insulating bush.

The electric interface structure is composed of a shell, the front end of the shell is fixed with a connector through a screw, and a sealing gasket is fixed between the shell and the connector.

The invention has the beneficial effects that: the integrated type pressure sensor has high integration, is integrated and multipurpose, has good vibration resistance, acceleration resistance and impact resistance, can bear high random vibration magnitude, high acceleration magnitude and high impact magnitude from multiple degrees of freedom under long-term pressing or free state, and always keeps reliable and stable contact; the electric connector is used as an external leading-out interface, has a function of preventing wrong insertion, and can improve the reliability of signal transmission compared with the lead leading-out; both static and dynamic sealing can be achieved.

Drawings

FIG. 1 is a schematic block diagram of at least one embodiment of the present invention;

FIG. 2 is a schematic view of the external force transfer mechanism of FIG. 1;

FIG. 3 is a schematic view of the stationary contact system of FIG. 1;

FIG. 4 is a schematic view of the dynamic contact system of FIG. 2;

fig. 5 is a schematic diagram of the electrical interface structure of fig. 1.

In the figure: 1-an external force transmission mechanism, 2-a first sealing ring, 3-a static contact system, 4-a conducting wire, 5-an electrical interface structure, 6-a pressing handle, 7-a first pressure spring, 8-a pressing block, 9-a locking pin, 10-a nut, 11-a second sealing ring, 12-a mounting seat, 13-a second pressure spring, 14-a cushion block, 15-a guide sleeve, 16-a fixed seat, 17-a dynamic contact system, 18-a rivet, 19-a conducting sheet, 20-a contact sheet, 21-a supporting sheet, 22-a supporting seat, 23-a pushing rod, 24-an inner insulating lining, 25-an outer insulating lining, 26-a dynamic contact ring, 27-a nut, 28-a shell, 29-a sealing gasket, 30-a connector and 31-a screw.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

Example 1

As shown in fig. 1 to 5, the sealed large-stroke switch includes an external force transmission mechanism 1, an electrical interface structure 5 is connected to the front end of the external force transmission mechanism 1 through a thread, a static contact system 3 and a dynamic contact system 17 are installed in the external force transmission mechanism 1, the static contact system 3 and the dynamic contact system 17 can contact to open and close a circuit, the static contact system 3 is connected to an outlet wire through a wire 4 and a fixed seat 16, and the fixed seat 16 is fixed to the front end of the electrical interface structure 5; a first sealing ring 2 is arranged between the external force transmission mechanism 1 and the electric interface structure 5.

Example 2

Based on embodiment 1, external force transmission mechanism 1 comprises pressing handle 6 and mount pad 12, and pressing handle 6 penetrates from the rear end of mount pad 12, and mount pad 12 front end is fixed with uide bushing 15, and static contact system 3 installs on uide bushing 15, moves contact system 17 and installs at pressing handle 6 front end.

Example 3

Based on embodiment 2, the rear end side opening of the mounting seat 12 is provided with the locking pin 9, and the inner end of the locking pin 9 is opposite to the pressing handle 6 and can lock the pressing handle 6.

Example 4

According to embodiment 3, the locking pin 9 has a nut 10 at its outer end; the locking pin 9 is fixed on the pressing block 8 through threads, and the pressing block 8 is fixed on the mounting seat 12; the front end of the locking pin 9 is provided with a first pressure spring 7.

Example 5

According to the embodiment 2, the second compression spring 13 in the mounting seat 12 is arranged between the guide sleeve 15 and the pressing handle 6.

Example 6

According to embodiment 5, a cushion block 14 is fixed on the mounting seat 12 between the second compression spring 13 and the guide sleeve 15.

Example 7

Based on embodiment 1, the stationary contact system 3 is composed of a supporting base 22, a plurality of conducting strips 19 are arranged on the supporting base 22 to pass through, the inner ends of the conducting strips 19 are connected with a fixed supporting sheet 21, and a contact sheet 20 is fixed on the supporting sheet 21.

Example 8

Based on embodiment 7, the conductive sheets 19 are circumferentially uniformly distributed.

Example 9

Based on embodiment 1, the movable contact system 17 is composed of a push rod 23, an inner insulating bushing 24 is sleeved outside the front portion of the push rod 23, a movable contact ring 26 is arranged at the front end of the inner insulating bushing 24, an outer insulating bushing 25 is sleeved and fixed on the push rod 23, and a nut 27 is arranged at the front end of the push rod 23 to limit the outer insulating bushing 25.

Example 10

Based on embodiment 1, the electrical interface structure 5 is composed of a housing 28, a connector 30 is fixed to the front end of the housing 28 by a screw 31, and a gasket 29 is fixed between the housing 28 and the connector 30.

Example 11

Based on the above embodiment, as shown in fig. 1, the switch structure includes an external force transmission mechanism 1, a first sealing ring 2, a static contact system 3, a conducting wire 4, and an electrical interface structure 5. Wherein, sealing washer 2 adorns in external force transmission mechanism 1, and electric interface structure 5 fixes in sealing washer 2 adorns in external force transmission mechanism 1 through threaded connection locking to realize external force transmission mechanism 1 and electric interface structure 5's static seal through extrusion sealing washer 2, 4 one ends of wire are fixed on static contact system 3 through soldering tin welding mode, and the other end is fixed at the electric connector afterbody through line ball contact pin mode.

As shown in fig. 2, the external force transmission mechanism comprises a pressing handle 6, a first compression spring 7, a pressing block 8, a locking pin 9, a nut 10, a second sealing ring 11, a mounting seat 12, a mounting seat 13, compression springs 2, a cushion block 14, a guide sleeve 15, a fixed seat 16 and a movable contact system 17. Wherein, the head of the press handle 6 is designed into a 'round cap' shape, so as to facilitate manual operation of a manual interface, and the press handle is connected with the movable contact system 17 through threads at the tail part; the pressing block 8 is in interference fit with a counter bore on the mounting seat 12, the first pressure spring 7 is fixed between a locking pin 9 step and the pressing block step 8, and the locking pin 9 is pressed and attached to the outer wall 6 of the pressing handle under the action of elastic potential energy of the first pressure spring 7; the nut 10 is screwed and fixed on the locking pin 9 through threads and is evenly coated with thread glue; the 11 sealing ring 2 is arranged in a U-shaped annular groove of the 12 mounting seat, and lubricating grease is uniformly coated on the 11 sealing ring 2; the second pressure spring 13 is arranged between a limiting step of a push rod 23 of the movable contact system 17 and the cushion block 14; the guide sleeve 15 is arranged between the cushion block 14 and the fixed seat 16 and used for guiding and positioning the movable contact system 17; and the movable contact system 17, the second pressure spring 13, the cushion block 14, the guide sleeve 15 and the fixed seat 16 are sequentially arranged in the mounting seat 12 and are fixed through riveting.

As shown in fig. 3, the static contact system comprises rivets 18, a conductive sheet 19, contact sheets 20, support sheets 21 and a support seat 22, wherein 6

contact sheets

20 and 6 support sheets 21 are uniformly distributed in a circular shape, 6 rivets 18 sequentially penetrate through 6

support sheets

21, 6 contact sheets 20, the support seat 22 and the conductive sheet 19 and are riveted and fixed on the support seat 22, and the riveted positions of the 6 rivets 18 and the conductive sheet are reinforced by soldering tin.

As shown in FIG. 4, the moving contact system comprises a push rod 23, an inner insulating bush 24, an outer insulating bush 25, a moving contact ring 26 and a nut 27. The inner insulating bush 24, the movable contact ring 26, the outer insulating bush 25 and the nut 27 sequentially penetrate through the push rod 23, are screwed and fixed on the push rod 23 through the nut 27, and are uniformly coated with thread glue for reinforcement.

As shown in fig. 5, the electrical interface structure includes a housing 28, a gasket 29, a connector 30, and a screw 31, wherein the gasket 29 and the connector 30 are locked and fixed on the housing 28 by the screw 31.

Therefore, the invention is composed of an external force transmission structure, a contact system, an electric interface structure and the like. The external force transmission structure is used for receiving external pressure and transmitting the external pressure into compression pressure spring movement and movable contact system movement; the main function of the contact system is to realize the on and off of control signals; the main function of the electric interface structure is to receive the control signal transmitted by the contact system and transmit the signal to the interface of the whole machine.

The circuit form of the switch is a 1D (group of control circuits, which are pressed and connected), when the switch is in a free state, the pressing handle and the movable contact system are in a free bouncing state, and the control signal circuit is in an off state. When the travel switch pressing handle is acted by external force, the movable contact system axially retracts into the shell, and when the retraction stroke reaches 7mm +/-1.5 mm, the control signal circuit is switched from an off state to an on state; the pressing handle is continuously pressed under the action of external force, the movable contact system continuously retracts axially in the shell, and when the retraction stroke reaches a full stroke state (the full stroke is compressed by 15mm +/-0.5 mm), the stroke switch always outputs one path of connection control signals outwards in the process. The locking pin is inserted into the locking annular groove on the pressing handle and the locking hole on the mounting seat at the same time, when the pressing handle is lost by the force of external action, the switch pressing handle cannot reset, all the time, one path of switch-on control signals are output, the locking pin is pulled out until the detection is completed, the switch is quickly reset to the spring-off state under the action of the internal pressure spring, and the control signal circuit is switched from the switch-on state to the switch-off state.

Claims

1. The utility model provides a sealed big travel switch, includes external force transmission mechanism (1), its characterized in that: the front end of the external force transmission mechanism (1) is in threaded connection with an electrical interface structure (5), a static contact system (3) and a dynamic contact system (17) are installed in the external force transmission mechanism (1), the static contact system (3) and the dynamic contact system (17) can contact to open and close a circuit, the static contact system (3) is connected with an outgoing line through a lead (4) and a fixed seat (16), and the fixed seat (16) is fixed at the front end of the electrical interface structure (5); a first sealing ring (2) is arranged between the external force transmission mechanism (1) and the electric interface structure (5).

2. The sealed large travel switch of claim 1, wherein: external force transfer mechanism (1) comprises according to handle (6) and mount pad (12), penetrates from mount pad (12) rear end according to handle (6), and mount pad (12) front end is fixed with uide bushing (15), and quiet contact system (3) are installed on uide bushing (15), move contact system (17) and install and press handle (6) front end.

3. The sealed large travel switch of claim 2, wherein: the opening at the rear end side of the mounting seat (12) is provided with a locking pin (9), the inner end of the locking pin (9) is right opposite to the pressing handle (6) and the pressing handle (6) can be locked.

4. A sealed large travel switch according to claim 3, wherein: a nut (10) is arranged at the outer end of the locking pin (9); the locking pin (9) is fixed on the pressing block (8) through threads, and the pressing block (8) is fixed on the mounting seat (12); the front end of the locking pin (9) is provided with a first pressure spring (7).

5. The sealed long travel switch of claim 2, wherein: a second pressure spring (13) is arranged in the mounting seat (12) and is arranged between the guide sleeve (15) and the pressing handle (6).

6. The sealed large travel switch of claim 5, wherein: a cushion block (14) is arranged between the second pressure spring (13) and the guide sleeve (15) and fixed on the mounting seat (12).

7. The sealed large travel switch of claim 1, wherein: the static contact system (3) is composed of a supporting seat (22), a plurality of conducting strips (19) penetrate through the supporting seat (22), the inner ends of the conducting strips (19) are connected with a fixed supporting sheet (21), and a contact piece (20) is fixed on the supporting sheet (21).

8. The sealed large travel switch of claim 7, wherein: the conducting strips (19) are uniformly distributed in the circumference.

9. The sealed long travel switch of claim 1, wherein: the movable contact system (17) is composed of a push rod (23), an inner insulating bush (24) is sleeved outside the front part of the push rod (23), a movable contact ring (26) is arranged at the front end of the inner insulating bush (24), an outer insulating bush (25) is sleeved and fixed on the push rod (23), and a nut (27) is arranged at the front end of the push rod (23) and used for limiting the outer insulating bush (25).

10. The sealed large travel switch of claim 1, wherein: the electric interface structure (5) is composed of a shell (28), a connector (30) is fixed at the front end of the shell (28) through a screw (31), and a sealing gasket (29) is fixed between the shell (28) and the connector (30).