CN220155391U - Cam mechanism convenient to adjust - Google Patents

Abstract

The utility model relates to a cam mechanism convenient to adjust, which comprises a central shaft, a cam and a plurality of micro switches, wherein the cam is sleeved on the central shaft, and the central shaft rotates to drive a protruding part of the cam to press the micro switches, and the cam mechanism is characterized in that: the center shaft is detachably connected with the cam, and a plurality of vertical slots are formed in the outer side of the cam. This cam mechanism convenient to adjust utilizes a word screwdriver to insert in the vertical slot, breaks the straight screwdriver off with the fingers and thumb and can drive the cam rotation, and the angular adjustment of cam is convenient and fast, and the adjustment process does not need very big space, simple structure and debugging precision error are little, and the reliability is high.

Description

Cam mechanism convenient to adjust

Technical Field

The utility model relates to the field of accessories with stroke limiting structures, such as electric actuators, electric valves, industrial automation and the like, in particular to a cam mechanism convenient to adjust.

Background

Cams are key components for controlling the switch and are widely used in various products. Wherein the electric actuators are a significant part. The electric actuator is mainly applied to automatic control of the valve, and can be used for on-site or remote control of the valve in a switching or adjusting way, so that the control is widely used. For example, the utility model patent with application number 202221058182.4 discloses a novel cam for an electric valve actuator, which comprises a base, two first cam plates, two second cam plates, two single-head studs and two pan head screws; the base is provided with a mounting hole and a connecting hole, and the side wall of the base is provided with a jacking screw; the first cam piece is provided with a first central through hole and a first arc-shaped adjusting hole; the second cam piece is provided with a second center through hole and a second arc-shaped adjusting hole; the base, the first cam pieces and the second cam pieces are arranged on the worm gear component, wherein the two first cam pieces are arranged up and down correspondingly, the two second cam pieces are arranged up and down correspondingly, and the first cam pieces and the second cam pieces are oppositely and alternately arranged relative to the ejector rod of the worm gear component; the two single-head studs are arranged on the base through a first cam piece and a second cam piece at the lower part, and the two pan head screws are connected to the top of the single-head stud. When the angle of the novel cam for the electric valve actuator is to be adjusted, the inner hexagonal wrench is required to loosen the jacking screw, and because the inner hexagonal wrench is in a right-angle bent configuration, the jacking screw is loosened and needs a large space, the adjustment angle deviation can be influenced in the process of loosening the locking and locking the jacking screw, the assembly process is time-consuming and labor-consuming, the cost is high, the debugging precision error is extremely easy to cause, and the reliability is low.

Disclosure of Invention

In view of the shortcomings of the background technology, the technical problem to be solved by the utility model is to provide the cam mechanism which has the advantages of simple structure, convenient and quick adjustment, small debugging precision error and high reliability and is convenient to adjust.

The utility model is realized by adopting the following technical scheme:

cam mechanism convenient to adjust, including center pin, cam and a plurality of micro-gap switch, the cam housing is located on the center pin, the center pin rotates the bellying that can drive the cam and supports presses micro-gap switch, characterized by: the center shaft is detachably connected with the cam, and a plurality of vertical slots are formed in the outer side of the cam.

Furthermore, an opening snap ring is arranged between the inner hole of the cam and the central shaft, a plurality of vertical elastic pieces protruding inwards are arranged on the inner wall of the opening snap ring at equal intervals, and the cam and the central shaft are clamped and assembled through the vertical elastic pieces on the opening snap ring.

Further, the circumference of the vertical slot is equally arranged on the outer side surface of the cam except the protruding part.

Further, the convex part comprises an upper convex part and a lower convex part, and the width of the upper convex part is larger than that of the lower convex part or the width of the lower convex part is larger than that of the upper convex part.

Further, the number of the cams is two, and one cam is provided with two micro switches.

After the technical scheme is adopted, the straight screwdriver is inserted into the vertical slot, the straight screwdriver can be broken to drive the cam to rotate, the angle of the cam is convenient and quick to adjust, a large space is not required in the adjusting process, the structure is simple, the debugging precision error is small, the reliability is high, and the electric actuator is particularly convenient to apply.

Drawings

The utility model has the following drawings:

FIG. 1 is an exploded view of the structure of the central shaft and single cam of the present utility model;

fig. 2 is a schematic perspective view of the utility model when applied to debugging an electric actuator.

Reference numerals: 1. a central shaft; 2. a cam; 3. a micro-switch; 4. a vertical slot; 5. an open snap ring; 6. a vertical spring plate; 7. an upper protrusion; 8. a lower protrusion; 9. a housing; 10. a main control board; 11. a motor; 12. a bracket; 13. a hand wheel; 14-shaped screwdriver.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

Referring to the drawings, the cam mechanism convenient to adjust provided by the utility model comprises a central shaft 1, a cam 2 and a plurality of micro switches 3, wherein the cam 2 is sleeved on the central shaft 1, and the central shaft 1 rotates to drive the protruding part of the cam 2 to press the micro switches 3, and the cam mechanism is characterized in that: the cam 2 is characterized in that the central shaft 1 and the cam 2 are detachably connected, a plurality of vertical slots 4 are formed in the outer side of the cam 2, an opening clamping ring 5 is arranged between an inner hole of the cam 2 and the central shaft 1, a plurality of vertical elastic pieces 6 protruding inwards are arranged on the inner wall of the opening clamping ring 5 at equal intervals, the cam 2 and the central shaft 1 are clamped and assembled through the opening clamping ring 5 and the vertical elastic pieces 6, the circumferences of the vertical slots 4 are equally distributed on the outer side surfaces of the cam 2 except for protruding portions, the protruding portions comprise an upper protruding portion 7 and a lower protruding portion 8, the width of the upper protruding portion 7 is larger than the width of the lower protruding portion 8 or the width of the lower protruding portion 8 is larger than the width of the upper protruding portion 7, and the number of the cams 2 is two, and one cam 2 is provided with two micro switches 3.

In this embodiment, utilize a word screwdriver to insert in the vertical slot 4, break with the fingers and thumb the straight screwdriver and can drive cam 2 and center pin 1 rotation, the angular adjustment of cam 2 is convenient and fast, the accommodation process does not need very big space, simple structure and debugging precision error are little, the reliability is high, in addition, protruding portion includes protruding 7 and lower protruding 8 on the width is different, protruding 7 and lower protruding 8 can touch different micro-gap switch 3 with the time of back and forth when cam 2 rotates to realize different time realization different functions.

Referring to fig. 2, the electric actuator belongs to the prior art, for convenience of understanding, the structure of the electric actuator is described herein simply, the electric actuator comprises a housing 9, a main control board 10 arranged in the housing 9, a motor 11 and a bracket 12, the housing 9 is provided with a hand wheel 13 for controlling a valve, a plurality of micro switches 3 are arranged on the bracket 12 and connected with a driving plate, a central shaft 1 is connected with a valve rod of the valve through a transmission component (gear), and the working principle is as follows: when an external power supply supplies power to the main control board 10, current flows to the motor 11 after being connected in series with the micro switch 3, the power of the motor 11 drives the central shaft 1 to rotate, the central shaft 1 is transmitted to the valve rod of the valve through the transmission part to enable the valve to be opened and closed, the central shaft 1 drives the cam 2 to rotate together, when the protruding part of the cam 2 is propped against the action reed corresponding to the micro switch 3, the power supply of the main control board 10 is cut off, the valve is closed, when the angle position of the valve is not right, a straight screwdriver can be inserted into the vertical slot 4, the swinging screwdriver can drive the cam 2 to increase or decrease the angle, then the corresponding power-off stop position of the central shaft 1 and the transmission part also changes, namely the closing angle of the valve can be controlled, the protruding part comprises an upper protrusion 7 and a lower protrusion 8 with different widths, so that the actions of the two micro switches 3 have angle deviation, the signal transmission is disconnected preferentially, the signal prompt before the power supply is provided to be cut off remotely, the problem that the action positions of different limit switches are uncertain is solved, the number of the cam 2 is two, one control the opening direction of the valve, and one control direction is controlled.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (5)

1. Cam mechanism convenient to adjust, including center pin, cam and a plurality of micro-gap switch, the cam housing is located on the center pin, the center pin rotates the bellying that can drive the cam and supports presses micro-gap switch, characterized by: the center shaft is detachably connected with the cam, and a plurality of vertical slots are formed in the outer side of the cam.

2. The easy-to-adjust cam mechanism of claim 1, wherein: an opening clamping ring is arranged between an inner hole of the cam and the central shaft, a plurality of vertical elastic pieces protruding inwards are arranged on the inner wall of the opening clamping ring at equal intervals, and the cam and the central shaft are clamped and assembled through the vertical elastic pieces on the opening clamping ring.

3. The easy-to-adjust cam mechanism according to claim 1 or 2, characterized in that: the circumference of the vertical slot is equally arranged on the outer side surface of the cam except the convex part.

4. A cam mechanism for facilitating adjustment according to claim 3, further characterized by: the protruding portion comprises an upper protrusion and a lower protrusion, and the width of the upper protrusion is larger than that of the lower protrusion or the width of the lower protrusion is larger than that of the upper protrusion.

5. The adjustable cam mechanism of claim 4, wherein: the number of the cams is two, and one cam is provided with two micro switches.