Anti-collision limit switch structure

Abstract

The utility model discloses an anti-collision limit switch structure, which belongs to the technical field of limit switch protection and is characterized in that an anti-collision assembly is mounted on the outer wall of a limit switch body, an L-shaped sliding plate is slidably connected onto the anti-collision assembly, the transverse edge of the L-shaped sliding plate is attached to the upper end of the limit switch body, and a limit assembly is mounted on the L-shaped sliding plate. A mistaken touch prevention assembly is installed between the trigger component and the limit switch body, and when a piston cylinder and a piston rod in the mistaken touch prevention assembly are impacted by external force to a rolling wheel, the trigger component rotates rapidly due to large impact force; the piston rod rapidly shrinks towards the interior of the piston cylinder through self-adaptive sliding of the sliding block in the second sliding groove and rotation of the U-shaped connecting piece, air in the piston cylinder is exhausted outwards through an exhaust hole, due to the high speed, the air in the piston cylinder cannot be rapidly exhausted, and then the piston rod cannot rapidly contract; therefore, after the impact force disappears, the trigger part does not make the contact act.

Description

Technical Field

[0001] The utility model belongs to the technical field of limit switch protection, and in particular relates to an anti-collision limit switch structure. Background Art

[0002] A limit switch (also known as a travel switch) is a commonly used low-current, master-control electrical device that utilizes the impact of mechanical moving parts to activate its contacts, connecting or disconnecting a control circuit to achieve a specific control objective. Typically, this type of switch is used to limit the position or travel of a moving machine, enabling it to automatically stop, reverse, change speed, or automatically reciprocate at a specific position or travel.

[0003] During the use of the limit switch, the outer wall of the limit switch needs to be protected. For example, Chinese utility model patent CN207834133U discloses an integrated travel switch protective cover, which includes a protective cover body and a travel switch. The travel switch is fixedly installed inside the protective cover body and the touch button of the travel switch is located inside the protective cover body. A hole is opened on the side panel of the protective cover body corresponding to the touch button. The position of the hole corresponds to the touch button, so that the position of the travel switch can be easily adjusted and the touch button of the travel switch can be protected.

[0004] Although the above-mentioned prior art can protect the outer wall of the limit switch, it is easy to cause accidental touch when the trigger component of the limit switch is hit, resulting in unnecessary mechanical action triggering, which is likely to cause accidents. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In order to solve the problem in the above background technology that the trigger component of the limit switch is easily touched by mistake when it is hit, resulting in unnecessary mechanical action triggering and easily causing accidents, the present utility model adopts the following technical solution.

[0007] A collision-proof limit switch structure, wherein a trigger component is rotatably connected to the limit switch body, a reset spring is arranged between the limit switch body and the trigger component, the upper end of the trigger component is rotatably connected to a rolling wheel, an anti-collision component is installed on the outer wall of the limit switch body, the anti-collision component wraps the outer wall of the limit switch body, an L-shaped sliding plate is slidably connected to the anti-collision component, the horizontal side of the L-shaped sliding plate fits the upper end of the limit switch body, the limit component is installed on the L-shaped sliding plate, the limit component moves toward the direction of the trigger component, and an anti-accidental touch component is installed between the trigger component and the limit switch body.

[0008] Preferably, the anti-collision component includes a three-side frame, a mounting backplate, a plug-in bolt and a fixing nut. The outer wall of the limit switch body is provided with a mounting backplate, and the mounting backplate is fixedly connected with a plug-in bolt passing through the limit switch body. The outer wall of the limit switch body is provided with a three-side frame. The three-side frame and the mounting backplate wrap the outer wall of the limit switch body, and the end of the plug-in bolt close to the outer wall of the three-side frame is threadedly connected with a fixing nut.

[0009] Preferably, the outer walls of the three-side frames are provided with assembly waist holes, and the plug-in bolts pass through the assembly waist holes.

[0010] Preferably, the limiting assembly includes a triangular member, a three-sided frame, an inflatable airbag and a rotating shaft. The horizontal side of the L-shaped sliding plate is fixedly connected to the triangular member, the inclined surface of the triangular member is set toward the trigger component, the interior of the triangular member is hollow and the upper end of the hollow part passes through, the hollow part of the oblique side of the triangular member near the bottom is rotatably connected to the rotating shaft, the outer wall of the rotating shaft is fixedly connected to the rotating pressure plate, the interior of the hollow part is detachably connected to the inflatable airbag, the inflatable airbag supports the rotating pressure plate, the upper end of the three-sided frame is provided with a first sliding groove, the interior of the first sliding groove is installed with a driving assembly, the driving assembly drives the L-shaped sliding plate to move the triangular member toward the trigger component.

[0011] Preferably, the driving assembly includes a micro motor and an adjusting screw, a micro motor is embedded in one side of the interior of the first sliding groove and is detachably connected, the rotating end of the micro motor is detachably connected to the adjusting screw, the rotating end of the adjusting screw is rotatably connected to the inner wall of the first sliding groove, the L-shaped sliding plate is slidably connected to the interior of the first sliding groove, and the L-shaped sliding plate is threadedly connected to the adjusting screw.

[0012] Preferably, the outer wall of the inflatable airbag is detachably connected to a pressure sensor passing through the triangular piece.

[0013] Preferably, the anti-accidental touch component includes a piston cylinder, a piston rod, an exhaust hole, a sliding block and a U-shaped connector. A second sliding groove is provided at the bottom of the trigger component, and the sliding block is slidably connected to the inside of the second sliding groove. The outer wall of the sliding block is rotatably connected to the vertical sides of the U-shaped connector. The horizontal side of the U-shaped connector is detachably connected to the outer wall near the bottom of the piston rod. The bottom piston of the piston rod is connected to the piston cylinder, and the outer wall of the piston cylinder near the bottom is provided with an exhaust hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. When the piston cylinder and piston rod in the anti-false touch assembly are hit by an external force on the scroll wheel, the trigger component rotates rapidly due to the strong impact force, and then the piston rod is quickly retracted into the interior of the piston cylinder through the adaptive sliding of the sliding block in the second sliding groove and the rotation of the U-shaped connector, and the air inside the piston cylinder is discharged outward through the exhaust hole. Due to the fast speed, the air inside the piston cylinder cannot be discharged quickly, and the piston rod cannot be retracted quickly, so that the trigger component will not cause the contact to operate after the impact force disappears, thereby preventing the external impact from causing the contact operation of the limit switch body. The mechanical moving part hits the scroll wheel at a constant speed, which can slowly discharge the air inside the piston cylinder, and the piston rod retracts into the interior of the piston cylinder to operate the contacts of the limit switch body.

[0016] 2. The L-shaped sliding plate is driven to move inside the second sliding groove by the rotation of the micro motor, so that the rotating pressure plate can contact the bottom of the trigger component and make the rotating pressure plate close to the outer wall of the inflatable airbag, so that the limit switch body will not control the movement of other mechanical moving parts due to misoperation when not in use.

[0017] 3. The internal pressure of the expansion bag is detected by the set pressure sensor, and when the internal pressure of the expansion bag is too low to support the rotating pressure plate, the staff is reminded to inflate it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an anti-collision limit switch in the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the three-side surrounding frame and the mounting back plate installed on the outer wall of the limit switch in the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the limit assembly in the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the anti-accidental touch component in the utility model.

[0022] The corresponding relationship between the labels and component names in the figures is as follows:

[0023] 100, limit switch body; 101, trigger component; 102, scroll wheel; 103, return spring; 104, second sliding slot;

[0024] 200, three-side frame; 201, mounting back plate; 202, plug-in bolts; 203, fixing nut; 204, first sliding slot; 205, L-shaped sliding plate; 206, triangular member; 207, inflatable airbag; 208, pressure sensor; 209, rotating shaft; 210, rotating pressure plate; 211, adjusting screw; 212, micromotor; 213, assembly waist hole;

[0025] 300, piston cylinder; 301, piston rod; 302, sliding block; 303, U-shaped connector; 304, exhaust hole. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0029] like Figure 1 As shown, it is a schematic diagram of an anti-collision limit switch structure of a preferred embodiment of the present invention. In the anti-collision limit switch structure of this embodiment, a trigger component 101 is rotatably connected to the limit switch body 100, a reset spring 103 is provided between the limit switch body 100 and the trigger component 101, and the upper end of the trigger component 101 is rotatably connected to the scroll wheel 102. In this embodiment, the mechanical moving component contacts the scroll wheel 102 to rotate the trigger component 101 and compress the reset spring 103, thereby enabling the contacts of the limit switch body 100 to move. The provision of the scroll wheel 102 can reduce friction when the mechanical moving components contact, thereby extending the service life of the limit switch body 100.

[0030] like Figure 2As shown, it is a schematic diagram of the outer wall structure of the three-side frame and the mounting back plate installed on the limit switch in this embodiment. The outer wall of the limit switch body 100 is provided with a mounting back plate 201, and the mounting back plate 201 is fixedly connected with a plug bolt 202 passing through the limit switch body 100. The outer wall of the limit switch body 100 is provided with a three-side frame 200. The three-side frame 200 and the mounting back plate 201 wrap the outer wall of the limit switch body 100. The outer wall of the three-side frame 200 is provided with an assembly waist hole 213. The plug bolt 202 passes through the assembly waist hole 213 and is fixed using a fixing nut 203. In this embodiment, the three-side frame 200 and the mounting back plate 201 fix the limit switch body 100 inside by tightening the fixing nut 203 and the plug bolt 202, so that the limit switch body 100 can be protected when the limit switch body 100 is hit, thereby increasing the service life of the limit switch body 100.

[0031] It is worth noting that the above-mentioned three-side frame 200, mounting back plate 201, plug-in bolts 202 and fixing nuts 203 are the anti-collision components in this embodiment. The anti-collision components include but are not limited to the three-side frame 200, mounting back plate 201, plug-in bolts 202 and fixing nuts 203. As long as the components can wrap the outside of the limit switch body 100, they can be applied to this embodiment.

[0032] like Figure 2 as well as Figure 3 As shown, a first sliding groove 204 is provided at the upper end of the three-sided frame 200, and a micro motor 212 is embedded in one side of the inner part of the first sliding groove 204 and is detachably connected. The rotating end of the micro motor 212 is detachably connected to the adjusting screw 211, and the rotating end of the adjusting screw 211 is rotatably connected to the inner wall of the first sliding groove 204. An L-shaped sliding plate 205 is slidably connected to the interior of the first sliding groove 204, and the L-shaped sliding plate 205 is threadedly connected to the adjusting screw 211. The horizontal side of the L-shaped sliding plate 205 fits the upper end of the limit switch body 100, and the horizontal side of the L-shaped sliding plate 205 is fixedly connected to a triangular piece 206. The inclined surface of the triangular piece 206 is set toward the trigger component 101, and the interior of the triangular piece 206 is hollow and hollow. The upper end of the triangular member 206 passes through, and the hollow part of the hypotenuse near the bottom is rotatably connected to the rotating shaft 209, and the outer wall of the rotating shaft 209 is fixedly connected to the rotating pressure plate 210. The interior of the hollow part is detachably connected to the expansion airbag 207, and the expansion airbag 207 supports the rotating pressure plate 210. In this embodiment, when the limit switch body 100 is not in use, the micro motor 212 is started to rotate and drive the L-shaped sliding plate 205 to move inside the second sliding groove 104, so that the rotating pressure plate 210 can contact the bottom of the trigger component 101, and the rotating pressure plate 210 is close to the outer wall of the expansion airbag 207, so that the limit switch body 100 will not control the movement of other mechanical moving parts due to misoperation when not in use.

[0033] It is worth noting that the above-mentioned micro motor 212 and adjusting screw 211 are the driving components in this embodiment. The driving components include but are not limited to the micro motor 212 and adjusting screw 211. As long as it is a component that can move the triangular member 206 toward the trigger component 101, it can be applied to this embodiment.

[0034] It is also worth noting that the above-mentioned triangular member 206, three-sided frame 200, inflatable airbag 207 and rotating shaft 209 are the limiting components in this embodiment. The limiting components include but are not limited to the triangular member 206, three-sided frame 200, inflatable airbag 207 and rotating shaft 209. As long as it is a component that can prevent the trigger component 101 from rotating, it can be applied to this embodiment.

[0035] like Figure 3 As shown, the outer wall of the expansion airbag 207 is detachably connected to a pressure sensor 208 that passes through the triangular piece 206. In this embodiment, the internal pressure of the expansion airbag 207 is detected by the pressure sensor 208, and when the internal pressure of the expansion airbag 207 is too low to support the rotating pressure plate 210, the staff is reminded to inflate it in time.

[0036] like Figure 4 As shown, it is a schematic diagram of the structure of the anti-false touch component in this embodiment. The bottom of the trigger component 101 is provided with a second sliding groove 104, and the interior of the second sliding groove 104 is slidably connected to a sliding block 302. The outer wall of the sliding block 302 is rotatably connected to the vertical sides of the U-shaped connecting piece 303 on both sides. The horizontal side of the U-shaped connecting piece 303 is detachably connected to the outer wall near the bottom of the piston rod 301. The bottom piston of the piston rod 301 is connected to the piston cylinder 300. The outer wall of the piston cylinder 300 near the bottom is provided with an exhaust hole 304. In this embodiment, when the scroll wheel 102 is hit by an external force, the trigger component 101 rotates rapidly due to the large impact force, and then the sliding block 302 is released in the second sliding groove 104. The adaptive sliding of the piston rod 301 and the rotation of the U-shaped connecting member 303 cause the piston rod 301 to quickly retract into the interior of the piston cylinder 300, and the air inside the piston cylinder 300 is discharged outward through the exhaust hole 304. Due to the high speed, the air inside the piston cylinder 300 cannot be discharged quickly, and the piston rod 301 cannot retract quickly. As a result, after the impact force disappears, the trigger component 101 will not cause the contact to operate, thereby preventing the external impact from causing the contact of the limit switch body 100 to operate. The mechanical moving component hits the scroll wheel 102 at a constant speed, which can slowly discharge the air inside the piston cylinder 300, and the piston rod 301 retracts into the interior of the piston cylinder 300, causing the contact of the limit switch body 100 to operate.

[0037] It is worth noting that the above-mentioned piston cylinder 300, piston rod 301, exhaust hole 304, sliding block 302 and U-shaped connector 303 are the anti-accidental touch components in this embodiment. The anti-accidental touch components include but are not limited to the piston cylinder 300, piston rod 301, exhaust hole 304, sliding block 302 and U-shaped connector 303. As long as the components can prevent the trigger component 101 from causing the contact to operate when it is hit, they can be applied to this embodiment.

[0038] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. An anti-collision limit switch structure, wherein a trigger component (101) is rotatably connected to a limit switch body (100), a return spring (103) is provided between the limit switch body (100) and the trigger component (101), and a rolling wheel (102) is rotatably connected to the upper end of the trigger component (101), characterized in that: An anti-collision component is installed on the outer wall of the limit switch body (100), and the anti-collision component wraps the outer wall of the limit switch body (100). An L-shaped sliding plate (205) is slidably connected to the anti-collision component, and the horizontal side of the L-shaped sliding plate (205) is in contact with the upper end of the limit switch body (100). The limit component is installed on the L-shaped sliding plate (205), and the limit component moves in the direction of the trigger component (101). An anti-mistouch component is installed between the trigger component (101) and the limit switch body (100).

2. The anti-collision limit switch structure according to claim 1, characterized in that: The anti-collision component comprises a three-side frame (200), a mounting back plate (201), a plug bolt (202) and a fixing nut (203); the outer wall of the limit switch body (100) is provided with a mounting back plate (201); the mounting back plate (201) is fixedly connected with a plug bolt (202) passing through the limit switch body (100); the outer wall of the limit switch body (100) is provided with a three-side frame (200); the three-side frame (200) and the mounting back plate (201) wrap the outer wall of the limit switch body (100); the end of the plug bolt (202) close to the outer wall of the three-side frame (200) is threadedly connected with the fixing nut (203).

3. The anti-collision limit switch structure according to claim 2, characterized in that: The outer wall of the three-side frame (200) is provided with an assembly waist hole (213), and the plug-in bolt (202) passes through the assembly waist hole (213).

4. The anti-collision limit switch structure according to claim 3, characterized in that: The limiting assembly includes a triangular member (206), a three-side frame (200), an expansion airbag (207) and a rotating shaft (209). The horizontal side of the L-shaped sliding plate (205) is fixedly connected to the triangular member (206). The inclined surface of the triangular member (206) is arranged toward the trigger component (101). The interior of the triangular member (206) is hollow and the upper end of the hollow part passes through. The hollow part of the oblique side of the triangular member (206) near the bottom is rotatably connected to the rotating shaft (209). The outer wall of the movable shaft (209) is fixedly connected to a rotating pressure plate (210), and the interior of the hollow part is detachably connected to an expansion air bag (207), and the expansion air bag (207) props up the rotating pressure plate (210). The upper end of the three-side frame (200) is provided with a first sliding groove (204), and the interior of the first sliding groove (204) is installed with a driving component, and the driving component drives the L-shaped sliding plate (205) to move the triangular member (206) toward the trigger component (101).

5. The anti-collision limit switch structure according to claim 4, characterized in that: The driving assembly comprises a micro motor (212) and an adjusting screw (211); the micro motor (212) is embedded in one side of the interior of the first sliding groove (204) and is detachably connected thereto; the rotating end of the micro motor (212) is detachably connected to the adjusting screw (211); the rotating end of the adjusting screw (211) is rotatably connected to the inner wall of the first sliding groove (204); the L-shaped sliding plate (205) is slidably connected to the interior of the first sliding groove (204); and the L-shaped sliding plate (205) is threadedly connected to the adjusting screw (211).

6. The anti-collision limit switch structure according to claim 5, characterized in that: The outer wall of the expansion airbag (207) is detachably connected to a pressure sensor (208) passing through the triangular piece (206).

7. The anti-collision limit switch structure according to claim 6, characterized in that: The anti-accidental touch component comprises a piston cylinder (300), a piston rod (301), an exhaust hole (304), a sliding block (302) and a U-shaped connecting piece (303); a second sliding groove (104) is provided at the bottom of the trigger component (101); the sliding block (302) is slidably connected inside the second sliding groove (104); the outer wall of the sliding block (302) is rotatably connected to the vertical sides of the U-shaped connecting piece (303); the horizontal side of the U-shaped connecting piece (303) is detachably connected to the outer wall near the bottom thereof; the bottom piston of the piston rod (301) is connected to the piston cylinder (300); and the outer wall of the piston cylinder (300) near the bottom thereof is provided with an exhaust hole (304).

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