CN216849727U

CN216849727U - Adjustable switch stroke structure

Info

Publication number: CN216849727U
Application number: CN202220521552.7U
Authority: CN
Inventors: 路金稳
Original assignee: Tianjin Lihua Valve Co ltd
Current assignee: Tianjin Lihua Valve Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-06-28
Anticipated expiration: 2032-03-10

Abstract

The utility model provides a switch stroke structure with adjustable, including the bottom plate, install two limit switch and actuating mechanism on the bottom plate, actuating mechanism and limit switch electric connection can drive the stop gear reciprocating motion who is located between two limit switch, and stop gear includes two direction adjustable cams, and two adjustable cams set gradually along the stroke orbit direction of adjustable cam, can realize the fine setting to the travel switch stroke through rotatory adjustable cam, and simple structure, low cost.

Description

Adjustable switch stroke structure

Technical Field

The utility model relates to an electric actuator technical field, concretely relates to structure that can adjust electric actuator travel switch stroke.

Background

A travel switch belongs to a position switch (also called a limit switch), is a common low-current master control electrical appliance, and achieves a certain control purpose by utilizing the collision of a mechanical motion part to make a contact of the mechanical motion part act to connect or disconnect a control circuit. Generally, such switches are used to limit the position or stroke of the movement of the machine, so that the moving machine can automatically stop, move in reverse direction, move at variable speed or automatically move back and forth according to a certain position or stroke, and are commonly used to control the opening and closing of a valve.

The stroke of the stroke switch produced by most manufacturers is not adjustable, and only part of the stroke switch is additionally provided with an electronic device through a circuit board to realize stroke adjustment. The angle positions of the valve during opening and closing are different under the influence of manufacturing errors of the valve and the field environment, the leakage condition caused by untight closing of the valve is possible to happen by using a structural mode with unadjustable stroke, the stroke is adjustable by additionally installing an electronic device, the complexity of a circuit board is increased, the manufacturing cost of a product is improved, and when the circuit board breaks down, the working position of the valve during opening and closing can not be accurately guaranteed, and the use of a user is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the not enough of prior art, provide a simple structure, the adjustable switch stroke structure that the cost of manufacture is low can be according to concrete valve structure adjustment travel switch's stroke.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a switch stroke structure with adjustable, includes the bottom plate, installs two limit switch and actuating mechanism on the bottom plate, actuating mechanism and limit switch electric connection can drive the stop mechanism reciprocating motion who is located between two limit switch, and limit mechanism includes two adjustable cams of adjustable direction, and two adjustable cams set gradually along the stroke orbit direction of adjustable cam, are used for pressing two travel switch respectively.

Specifically, two travel switches are respectively installed at two ends of a through hole formed in the bottom plate along the travel track of the adjustable cam, the adjustable cam is connected with the actuating mechanism through a limit stop, the limit stop is located below the bottom plate, the adjustable cam is located above the bottom plate, and the two adjustable cams are installed on an installation column arranged on the limit stop through self-tapping screws.

Specifically, the actuating mechanism comprises an output shaft connected with the positive and negative motors, the output shaft is rotatably connected with the bottom plate, and the limit stop block is sleeved on the output shaft and rotates synchronously with the output shaft.

Specifically, the top end of the output shaft penetrates through the bottom plate and is connected with an indicating piece, and a pointer is installed on the indicating piece.

Specifically, the output shaft is in transmission connection with the positive and negative motors through the output gear.

Switch stroke structure with adjustable obtain through above-mentioned technical scheme, its beneficial effect is:

1. the stroke of the travel switch can be flexibly adjusted by arranging the adjustable cam, so that the applicability of the travel switch is improved, and the travel switch is low in cost, safe and reliable;

2. the adjustable cam is installed by using the self-tapping screw, and the adjustment is convenient.

Drawings

Fig. 1 is a schematic perspective view of the adjustable switch stroke structure.

Fig. 2 is a top view of the adjustable switch stroke structure.

Fig. 3 is a side view of the adjustable switch travel structure.

In the figure, 1, output shaft; 2. an output gear; 3. a limit stop block; 4. a base plate; 5. a first limit switch; 6. a second limit switch; 7. an adjustable cam; 8. a self-tapping screw; 9. an indicator.

Detailed Description

In order to overcome machining error and other factor influences, realize the micro-adjustment to travel switch stroke, the utility model provides a switch stroke structure with adjustable, including the bottom plate, install two limit switch and actuating mechanism on the bottom plate, actuating mechanism and limit switch electric connection, actuating mechanism can drive the stop gear reciprocating motion who is located between two limit switch, and stop mechanism includes two adjustable cams, is used for pressing down two limit switch respectively and makes actuating mechanism stop, adjusts the adjustable cam through rotatory adjustable cam and towards limit switch's curved surface profile, realizes the stroke adjustment.

The invention is further described below with reference to the drawings and examples so that the advantages and features of the invention can be more readily understood by those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1 to 3, an adjustable switch stroke structure includes a bottom plate 4, a first limit switch 5, a second limit switch 6, a limit mechanism and an actuator, where the limit mechanism includes a limit stop 3 connected to the actuator and an adjustable cam 7 installed on the limit stop 3, the first limit switch 5 and the second limit switch 6 are installed at two ends of a through hole provided along a stroke track of the adjustable cam 7 on the bottom plate 4 through a clamping seat, the number of the adjustable cams 7 is two, and the two adjustable cams 7 are respectively used for pressing the first limit switch 5 and the second limit switch 6, that is, the two adjustable cams 7 are also sequentially arranged along the stroke track direction of the adjustable cam 7, and curved surface profiles of the adjustable cam 7 facing the first limit switch 5 and the second limit switch 6 can be adjusted by rotation to realize stroke adjustment.

The executing mechanism comprises an output shaft 1 connected with the positive and negative motors, the output shaft 1 is rotatably connected with the bottom plate 4, and the limit stop 3 is sleeved on the output shaft 1 and rotates synchronously with the output shaft 1.

When the positive and negative motor receives a starting instruction, the output shaft 1 drives the adjustable cam 7 on the limit stop 3 to rotate until the adjustable cam 7 presses the first limit switch 5 or the second limit switch 6, and the positive and negative motor stops.

It should be noted that the positive and negative motors can be directly connected with the 1-key of the output shaft and can also be in transmission connection through the transmission assembly. In one embodiment, the output shaft 1 is riveted with an output gear 2, and the rotation of the output gear 2 drives the rotation of the output shaft 1.

Specifically, the limit stop 3 is located below the bottom plate 4, the adjustable cams 7 are located above the bottom plate 4, the two adjustable cams 7 are mounted on mounting columns on the limit stop 3 through self-tapping screws 8, and the base circle diameter of each adjustable cam 7 is larger than the width of each through hole.

When the adjustable cam 7 is installed, the adjustable cam 7 is rotated according to the actual required stroke, and the adjustable cam is fixed on the limit stop 3 through the tapping screw 8 after the adjustment is determined.

Certainly, the adjustable cam 7 can also be fixed in other manners, for example, after the adjustable cam 7 is rotated according to the actual required stroke, the locking screw vertically inserted on the adjustable cam 7 is adopted to abut against the mounting column, and when readjustment is needed, the locking screw is only required to be unscrewed, and then the adjustable cam 7 is rotated.

Furthermore, the top end of the output shaft 1 penetrates through the bottom plate to be connected with an indicating piece 9, a pointer is installed on the indicating piece and used for displaying a stroke state, and when the indicating piece is applied to a valve, the opening and closing state of the valve can be displayed.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. The utility model provides a switch stroke structure with adjustable, its characterized in that includes the bottom plate, installs two limit switch and actuating mechanism on the bottom plate, and actuating mechanism and limit switch electric connection can drive the stop mechanism reciprocating motion who is located between two limit switch, and stop mechanism includes two adjustable cams of adjustable direction, and two adjustable cams set gradually along the stroke orbit direction of adjustable cam.

2. The adjustable switch travel structure according to claim 1, wherein two travel switches are respectively mounted at both ends of a through hole provided along a travel path of the adjustable cam on the base plate, the adjustable cam is connected to the actuator through a limit stop, the limit stop is located below the base plate, the adjustable cam is located above the base plate, and the two adjustable cams are mounted on mounting posts provided on the limit stop through self-tapping screws.

3. The adjustable switch travel structure according to claim 2, wherein the actuator comprises an output shaft connected to the forward and reverse motors, the output shaft is rotatably connected to the base plate, and the limit stop is sleeved on the output shaft and rotates synchronously with the output shaft.

4. The adjustable switch travel structure according to claim 3, wherein an indicator is connected to the top end of the output shaft through the bottom plate, and a pointer is mounted on the indicator.

5. The adjustable switch travel structure according to claim 3, wherein the output shaft is in transmission connection with a positive and negative motor through an output gear.