Novel cam triggering mechanism and working method

Abstract

The invention relates to the technical field of switching trigger mechanisms, and discloses a novel cam trigger mechanism and a working method.The novel cam trigger mechanism comprises a supporting frame, and a cover plate is fixedly connected to the top end of the supporting frame. According to the novel cam triggering mechanism and the working method, the small gear is fixed to the cam shaft through the clamping groove and can drive the cam shaft to rotate together, and the cam shaft drives the first cam, the second cam, the third cam and the fourth cam which are fixed to the cam shaft through the locking screws to rotate together; the first cam, the second cam, the third cam and the fourth cam are clamped together through fluted discs machined on the side faces of the cams, the protruding parts of the cams trigger different travel switches in the rotating process, and the sequence, displacement and angle of triggering the travel switches are determined through the installation positions and the installation angles of the cams and the shapes of the protruding parts of the cams. After different travel switches are triggered, signals are fed back to an upper controller, control logic is achieved, the travel switches are isolated through insulating plates, and signal interference is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of switch trigger mechanisms, in particular to a novel cam trigger mechanism and a working method. Background Art

[0002] The development background of micro switches and travel switches is closely related to their wide application in industry and daily life. The emergence and development of these switch trigger mechanisms are to meet the needs of modern electrical control systems for precise, fast and reliable control. Micro switches are a kind of fast switch actuated by pressure. Its working principle is to use external mechanical force to act on the action reed to produce instantaneous action, thereby realizing the rapid connection or disconnection of the circuit. This switch has the characteristics of small size, sensitive action, and small contact interval. It is suitable for automatic control and safety protection devices that require frequent circuit switching. Travel switches are mainly used to detect the position of working machinery and issue commands to control its movement direction or stroke length. According to the structure, travel switches are divided into mechanical contact travel switches and electrical non-contact proximity switches.

[0003] However, the existing direct-acting trigger mechanism of the travel switch or micro switch has a single trigger mode action, the switch is subjected to large force and the force is subjected to a long time, and is prone to impact or fatigue damage. Therefore, a new cam trigger mechanism and working method are urgently needed. Summary of the invention

[0004] The purpose of the present invention is to provide a novel cam triggering mechanism and working method to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a novel cam triggering mechanism and a working method, comprising a support frame, a top end of which is fixedly connected to a cover plate; A camshaft is installed on the inner wall of the supporting frame, an adjusting washer is installed on the surface of the camshaft, a cam four is installed on the surface of the camshaft, a cam three is installed on the surface of the camshaft, a cam two is installed on the surface of the camshaft, a cam one is installed on the surface of the camshaft, a nut two is installed on the surface of the camshaft, a locking screw is threadedly connected to the surface of the cam one, a pinion is installed on the surface of the camshaft, a sleeve three is installed on the left end of the camshaft, a sleeve two is installed on the right end of the camshaft, a large gear is meshed on the top end of the pinion, a connecting shaft is fixedly connected to the inner wall of the large gear, and the connecting shaft is fixedly connected to the inner wall of the large gear. A thin nut is threadedly connected to the surface of the shaft, a nut 1 is threadedly connected to the surface of the connecting shaft, a spring washer 1 is installed on the surface of the connecting shaft, an adjustment sleeve is installed on the surface of the connecting shaft, a stop screw is threadedly connected to the surface of the connecting shaft, a sleeve 1 is installed on the left end of the connecting shaft, a travel switch mounting plate is installed on the inner wall of the support frame, a travel switch mounting plate 1 is fixedly connected to the bottom end of the travel switch mounting plate 2, a travel switch fixing rod is installed on the inner wall of the travel switch mounting plate 1, an insulating plate is installed on the surface of the travel switch fixing rod, and a travel switch is installed on the surface of the travel switch fixing rod.

[0006] Preferably, the top end of the travel switch mounting plate 2 is fixedly connected with a terminal mounting plate, the two end surfaces of the travel switch fixing rod are installed with spring washers 3, and the two end surfaces of the travel switch fixing rod are threadedly connected with nuts 3.

[0007] Preferably, a mounting plate is installed on the left end surface of the support frame, and the mounting plate is threadedly connected to the left end of the support frame through a bolt 1, and a spring washer 2 is provided on the surface of the bolt 1.

[0008] Preferably, a rotating rod is installed on the surface of the connecting shaft, a pointer is installed on the surface of the connecting shaft, and an angle indicator is fixedly connected to the right end of the supporting frame.

[0009] Preferably, a support plate is provided on the inner wall of the support frame, the left end of the connecting shaft is rotatably connected to the support plate, and the right end of the cam shaft passes through the support plate and is rotatably connected to the support frame.

[0010] Preferably, five travel switches are provided, and the five travel switches are linearly arranged and distributed along the surface of the travel switch fixing rod.

[0011] Preferably, the left end of cam one is meshed with cam two, the left end of cam two is meshed with cam three, and the left end of cam three is meshed with cam four.

[0012] Preferably, the following steps are included: S1, the rotating rod is in a horizontal position, at which time the pointer points to the "0" position, but not the fully closed position of the device under test; The S2 rotating rod is rotated 45° counterclockwise from the "0" position to the fully closed position of the device under test; The S3 rotating rod is rotated 45° clockwise from the "0" position to the fully open position of the device under test.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: First, the device under test of the present invention drives the rotating rod to rotate by connecting to the zero on one side of the rotating rod. The rotating rod is fixed to the connecting shaft as a whole through the square mounting hole, so when the rotating rod rotates, it will drive the connecting shaft to rotate at the same time. The large gear is installed on the connecting shaft and fixed with a locking screw. It can rotate with the connecting shaft and drive the small gear meshing with it to rotate together. Through the size transmission ratio, the rotation torque is reduced and the rotation angle displacement is transmitted. The small gear is fixed on the camshaft through a slot and can drive the camshaft to rotate together. The camshaft drives the cam 1, cam 2, cam 3 and cam 4 fixed thereon by the locking screw to rotate together. The cam 1, cam 2, cam 3 and cam 4 are clamped together through the toothed disk processed on the side of the cam. During the rotation process, the cam protrusion triggers different travel switches. Each cam determines the order, displacement and angle of triggering the travel switch through its installation position, installation angle and the shape of the cam protrusion. After the different travel switches are triggered, the feedback signal is given to the upper controller to realize the control logic. The travel switches are isolated by insulating plates to avoid signal interference.

[0014] Second, the present invention can effectively reduce the triggering force on the travel switch and prevent the travel switch from being damaged by impact or fatigue through the mode of rotating the rotating rod, gear transmission and cam rotation triggering. The rotating triggering structure assembled by the trigger mechanism assembly diagram can change the triggering position by adjusting the overall rotation angle of the camshaft, and can also change the triggering range, triggering position, triggering angle and other parameters of the travel switch by adjusting the meshing angle of the toothed disc of the split gear or changing the outer circle shape and position of the cam protrusion.

[0015] Third, the present invention can realize complex trigger logic and meet control requirements by matching cams of different numbers, shapes and installation angles. The cam trigger mechanism transmits force and position through a rotating rod and a transmission gear, which effectively reduces the force on the travel switch, avoids damage to the travel switch, and ensures that the trigger mechanism can better realize the control function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the right side of the structure of the present invention; Figure 4It is a schematic diagram of the left side of the structure of the present invention.

[0017] Among them: 1. Rotating rod; 2. Angle indicator plate; 3. Pointer; 5. Terminal mounting plate; 6. Support frame; 7. Sleeve one; 8. Large gear; 9. Stop screw; 10. Adjusting sleeve; 11. Spring washer one; 12. Nut one; 13. Thin nut; 14. Connecting shaft; 15. Sleeve two; 16. Small gear; 17. Nut two; 18. Locking screw; 19. Cam one; 20. Cam two; 21. Cam three; 22. Cam four; 23. Adjusting washer; 24. Camshaft; 25. Mounting plate; 26. Bolt one; 27. Spring washer two; 28. Sleeve three; 29. ​​Travel switch mounting plate one; 30. Travel switch fixing rod; 31. Nut three; 32. Spring washer three; 33. Travel switch; 34. Insulating plate; 35. Travel switch mounting plate two; 36. Cover plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention provides the following technical solutions: Example

[0020] See also Figure 1-4 , a novel cam trigger mechanism, comprising a support frame 6, a cover plate 36 being fixedly connected to the top of the support frame 6; A camshaft 24 is mounted on the inner wall of the support frame 6, an adjusting washer 23 is mounted on the surface of the camshaft 24, a cam four 22 is mounted on the surface of the camshaft 24, a cam three 21 is mounted on the surface of the camshaft 24, a cam two 20 is mounted on the surface of the camshaft 24, a cam one 19 is mounted on the surface of the camshaft 24, a nut two 17 is mounted on the surface of the camshaft 24, a locking screw 18 is threadedly connected to the surface of the cam one 19, a pinion 16 is mounted on the surface of the camshaft 24, a sleeve three 28 is mounted on the left end of the camshaft 24, a sleeve two 15 is mounted on the right end of the camshaft 24, a large gear 8 is meshed on the top end of the pinion 16, and a connecting shaft 14 is fixedly connected to the inner wall of the large gear 8. A thin nut 13 is threadedly connected to the surface of the connecting shaft 14, a nut 12 is threadedly connected to the surface of the connecting shaft 14, a spring washer 11 is installed on the surface of the connecting shaft 14, an adjusting sleeve 10 is installed on the surface of the connecting shaft 14, a stop screw 9 is threadedly connected to the surface of the connecting shaft 14, a sleeve 7 is installed on the left end of the connecting shaft 14, a travel switch mounting plate 2 35 is installed on the inner wall of the support frame 6, a travel switch mounting plate 29 is fixedly connected to the bottom end of the travel switch mounting plate 25, a travel switch fixing rod 30 is installed on the inner wall of the travel switch mounting plate 29, an insulating plate 34 is installed on the surface of the travel switch fixing rod 30, and a travel switch 33 is installed on the surface of the travel switch fixing rod 30.

[0021] Through the above technical scheme, the support frame 6 is made of bent plates and bent plates, and the travel switch mounting plate 2 35 and the mounting plate 25 are installed as the basis. The sleeve 1 7 and the sleeve 2 15 are installed on the support frame 6 with interference fit to fix the connecting shaft 14 and the camshaft 24. After the large gear 8 is placed in the position shown in the figure, it is passed into the connecting shaft 14, and then the adjusting sleeve 10 and the rotating rod 1 are installed, and finally the spring washer 11 is installed, and the nut 12 is tightened to fix it, and a thin nut 13 is used to tighten and stop the rotation. The small gear 16, cam 1 19, cam 20, cam 3 21, cam 4 22 and nut 2 17 are placed in the position shown in the figure. After determining the cam angle, the gear teeth between each cam are meshed tightly with each other, and then the camshaft 24 is strung in. When the camshaft 24 is strung in, it is necessary to pay attention to the meshing of the small gear 16 and the large gear 8. After adjusting all the cam positions, the cam is fixed to the camshaft 24 with nut 2 17, and finally the drill is matched. After the mounting holes of the stop screw 9 and the locking screw 18 are inserted, the three locking screws 18 are screwed in to fix the large gear 8 and all cams. The travel switch 33 and the insulating plate 34 are placed in the U-shaped groove of the travel switch mounting plate 2 35 as shown in the figure. Then the travel switch fixing rod 30 is strung in, and the travel switch 33 is tightened and fixed at both ends using the nut 31 and the spring washer 32. The terminal mounting plate 5 is welded on the travel switch mounting plate 2 35 for installing the wiring terminal 4. After the overall installation, the travel switch mounting plate 2 35 and the zero thereon are fixed to the support frame 6 with screws, the pointer 3 is installed on the connecting shaft 14 and rotates therewith, the angle indicator plate 2 is pasted on the support frame 6 for angle indication, and finally the cover plate 36 is installed on the support frame 6 with screws to protect the internal equipment. After the overall assembly is completed, the trigger mechanism of the present invention is installed in a suitable position. The trigger mechanism of the present invention should be installed vertically, and the cover plate 36 is installed on the upper part.

[0022] Specifically, the top of the travel switch mounting plate 2 35 is fixedly connected with the terminal mounting plate 5 , the two end surfaces of the travel switch fixing rod 30 are installed with spring washers 32 , and the two end surfaces of the travel switch fixing rod 30 are threadedly connected with nuts 31 .

[0023] Through the above technical solution, the nut three 31 is tightened to compress the spring washer three 32 to fix the travel switch fixing rod 30.

[0024] Specifically, a mounting plate 25 is installed on the left end surface of the support frame 6 , and the mounting plate 25 is threadedly connected to the left end of the support frame 6 via a bolt 1 26 , and a spring washer 27 is provided on the surface of the bolt 1 26 .

[0025] Through the above technical solution, the installation of the camshaft 24 is reinforced by the mounting plate 25 .

[0026] Specifically, a rotating rod 1 is installed on the surface of the connecting shaft 14 , a pointer 3 is installed on the surface of the connecting shaft 14 , and an angle indicator 2 is fixedly connected to the right end of the supporting frame 6 .

[0027] Through the above technical solution, the operation of the device is controlled by observing the angle indicator plate 2 .

[0028] Specifically, a support plate is provided on the inner wall of the support frame 6 , the left end of the connecting shaft 14 is rotatably connected to the support plate, and the right end of the cam shaft 24 penetrates the support plate and is rotatably connected to the support frame 6 .

[0029] Through the above technical solution, the camshaft 24 and the connecting shaft 14 are stably installed inside the supporting frame 6 .

[0030] Specifically, five travel switches 33 are provided, and the five travel switches 33 are linearly arranged and distributed along the surface of the travel switch fixing rod 30 .

[0031] Through the above technical solution, after different travel switches 33 are triggered, feedback signals are given to the upper controller to implement the control logic; the travel switches 33 are isolated by insulating plates 34 to avoid signal interference. Specifically, the left end of cam one 19 is meshed with cam two 20, the left end of cam two 20 is meshed with cam three 21, and the left end of cam three 21 is meshed with cam four 22.

[0032] Through the above technical solution, cam 1 19, cam 2 20, cam 3 21 and cam 4 22 are clamped together through the toothed disc processed on the cam side, and the cam protrusion triggers different travel switches 33 during rotation. Each cam determines the sequence, displacement and angle of triggering the travel switch 33 through its installation position, installation angle and the shape of the cam protrusion.

[0033] When in use, the device under test drives the rotating rod 1 to rotate by connecting to the zero on one side of the rotating rod 1. The rotating rod 1 is fixed to the connecting shaft 14 as a whole through the square mounting hole, so when the rotating rod 1 rotates, it will drive the connecting shaft 14 to rotate at the same time. The large gear 8 is installed on the connecting shaft 14 and fixed with the stop screw 9. It can rotate with the connecting shaft 14 and drive the small gear 16 meshing with it to rotate together. Through the size transmission ratio, the rotational torque is reduced and the rotational angular displacement is transmitted. The small gear 16 is fixed on the camshaft 24 through the slot, which can drive the camshaft 24 to rotate together. The camshaft 24 drives the cam 19 fixed thereon by the locking screw 18. Cam 2 20, cam 3 21 and cam 4 22 rotate together, cam 1 19, cam 2 20, cam 3 21 and cam 4 22 are clamped together by the toothed disc processed on the side of the cam, and the cam protrusion triggers different travel switches 33 during the rotation. Each cam determines the order, displacement and angle of triggering the travel switch 33 through its installation position, installation angle and the shape of the cam protrusion. After different travel switches 33 are triggered, feedback signals are given to the upper controller to realize the control logic; insulating plates 34 are used to isolate each travel switch 33 to avoid signal interference. Example

[0034] A novel working method of a cam trigger mechanism comprises the following steps: S1 a rotating rod 1 is in a horizontal position, at which time a pointer 3 points to the "0" position, but not the fully closed position of the device under test; S2 rotating rod 1 is rotated 45° counterclockwise from the "0" position to the fully closed position of the device under test; The S3 rotating rod 1 is rotated 45° clockwise from the "0" position to set it to the fully open position of the device under test.

[0035] Through the above technical solution, the control logic is realized, and the travel switches 33 are isolated by using insulating plates 34.

[0036] When in use, the sequence, displacement and angle of the switches, after the different travel switches 33 are triggered, feedback signals are given to the upper controller to implement the control logic. Insulating plates 34 are used to isolate the travel switches 33 to avoid signal interference.

[0037] Working principle: The device under test drives the rotating rod 1 to rotate by connecting to the zero on one side of the rotating rod 1. The rotating rod 1 is fixed as a whole with the connecting shaft 14 through the square mounting hole, so when the rotating rod 1 rotates, it will drive the connecting shaft 14 to rotate at the same time. The large gear 8 is installed on the connecting shaft 14 and fixed with the stop screw 9. It can rotate with the connecting shaft 14 and drive the small gear 16 meshing with it to rotate together. Through the size transmission ratio, the torque is reduced and the angular displacement is transmitted. The small gear 16 is fixed on the camshaft 24 through the slot, which can drive the camshaft 24 to rotate together. The camshaft 24 drives the cam 1 19, cam 2 20, cam 3 21 and cam 4 22 fixed thereon by the locking screw 18 to rotate together. The cam 1 19, cam 2 20, cam 3 21 and cam 4 22 are clamped together by the toothed disc processed on the side of the cam. During the rotation process, the raised part of the cam triggers different travel switches 33. Each cam determines the sequence, displacement and angle of triggering the travel switch 33 through its installation position, installation angle and the shape of the cam protrusion. After different travel switches 33 are triggered, feedback signals are given to the upper controller to implement the control logic. Insulating plates 34 are used to isolate the travel switches 33 to avoid signal interference. In addition, the present invention can effectively reduce the trigger force on the travel switch 33 and prevent the travel switch 33 from being damaged by impact or fatigue through the rotation of the rotating rod 1, gear transmission and cam rotation triggering mode. The rotating trigger structure assembled by the trigger mechanism assembly diagram can change the trigger position by adjusting the overall rotation angle of the camshaft 24, and can also change the trigger range, trigger position, trigger angle and other parameters of the travel switch 33 by adjusting the meshing angle of the toothed disc of the split gear or changing the outer circle shape and position of the cam protrusion. By matching cams of different numbers, shapes and installation angles, complex trigger logic can be realized to meet control requirements. The cam trigger mechanism transmits force and position through the rotating rod 1 and the matching transmission gear, which effectively reduces the force on the travel switch 33, avoids damage to the travel switch 33, and ensures that the trigger mechanism can better realize the control function.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel cam triggering mechanism, comprising a support frame (6), characterized in that: A cover plate (36) is fixedly connected to the top end of the support frame (6); A camshaft (24) is mounted on the inner wall of the support frame (6); an adjusting washer (23) is mounted on the surface of the camshaft (24); a cam four (22) is mounted on the surface of the camshaft (24); a cam three (21) is mounted on the surface of the camshaft (24); a cam two (20) is mounted on the surface of the camshaft (24); a cam one (19) is mounted on the surface of the camshaft (24); a nut two (17) is mounted on the surface of the camshaft (24); a locking screw (18) is threadedly connected to the surface of the cam one (19); a pinion (16) is mounted on the surface of the camshaft (24); a sleeve three (28) is mounted on the left end of the camshaft (24); a sleeve two (15) is mounted on the right end of the camshaft (24); a large gear (8) is meshed at the top end of the pinion (16); and a connecting shaft (8) is fixedly connected to the inner wall of the large gear (8). 14), a thin nut (13) is threadedly connected to the surface of the connecting shaft (14), a nut (12) is threadedly connected to the surface of the connecting shaft (14), a spring washer (11) is installed on the surface of the connecting shaft (14), an adjustment sleeve (10) is installed on the surface of the connecting shaft (14), a stop screw (9) is threadedly connected to the surface of the connecting shaft (14), a sleeve (7) is installed on the left end of the connecting shaft (14), a travel switch mounting plate (2) (35) is installed on the inner wall of the support frame (6), a travel switch mounting plate (29) is fixedly connected to the bottom end of the travel switch mounting plate (25), a travel switch fixing rod (30) is installed on the inner wall of the travel switch fixing rod (30), an insulating plate (34) is installed on the surface of the travel switch fixing rod (30), and a travel switch (33) is installed on the surface of the travel switch fixing rod (30).

2. A novel cam trigger mechanism according to claim 1, characterized in that: The top end of the second travel switch mounting plate (35) is fixedly connected to a terminal mounting plate (5), the surfaces of both ends of the travel switch fixing rod (30) are mounted with spring washers (32), and the surfaces of both ends of the travel switch fixing rod (30) are threadedly connected with nuts (31).

3. A novel cam trigger mechanism according to claim 1, characterized in that: A mounting plate (25) is mounted on the left end surface of the support frame (6); the mounting plate (25) is threadedly connected to the left end of the support frame (6) via a first bolt (26); a second spring washer (27) is disposed on the surface of the first bolt (26).

4. A novel cam triggering mechanism according to claim 1, characterized in that: A rotating rod (1) is mounted on the surface of the connecting shaft (14), a pointer (3) is mounted on the surface of the connecting shaft (14), and an angle indicator (2) is fixedly connected to the right end of the supporting frame (6).

5. A novel cam triggering mechanism according to claim 1, characterized in that: The inner wall of the support frame (6) is provided with a support plate, the left end of the connecting shaft (14) is rotatably connected to the support plate, and the right end of the cam shaft (24) passes through the support plate and is rotatably connected to the support frame (6).

6. A novel cam trigger mechanism according to claim 1, characterized in that: Five travel switches (33) are provided, and the five travel switches (33) are linearly arranged and distributed along the surface of the travel switch fixing rod (30).

7. A novel cam triggering mechanism according to claim 1, characterized in that: The left end of the cam one (19) meshes with the cam two (20), the left end of the cam two (20) meshes with the cam three (21), and the left end of the cam three (21) meshes with the cam four (22).

8. The working method of the novel cam triggering mechanism according to claim 1 is characterized in that: The following steps are involved: The S1 rotating rod (1) is in the horizontal position. At this time, the pointer (3) points to the "0" position, but it is not the fully closed position of the device under test; The S2 rotating rod (1) is rotated 45° counterclockwise from the "0" position to the fully closed position of the device under test; The S3 rotating rod (1) is rotated 45° clockwise from the "0" position to the fully open position of the device under test.

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