A trigger device for a travel switch

Abstract

The present invention relates to the technical field of travel switches, and specifically to a trigger device of a travel switch, comprising a protective shell and a travel switch body, wherein the interior of the protective shell clamps the travel switch body and is fixed on both sides with fixing bolts, and the protective shell consists of an upper protective cover and a lower protective cover, the upper protective cover and the lower protective cover have the same structure and are mirror-jointed, and a clamping mechanism is installed at the center of the upper protective cover and the lower protective cover to clamp the limit travel switch body, and by providing two sets of mirror-mounted upper protective covers and lower protective covers, the travel switch body can be quickly protected to reduce the impact of the external environment, thereby increasing the service life of the travel switch body and reducing the production cost, and by providing a linkage component, the dustproof component can be driven to operate in the reverse direction under the rotation of the touch component, thereby achieving the trigger mechanism working without affecting the operation of the internal travel switch body, thereby reducing the damage to the electrical components inside the travel switch body.

Description

Technical Field

[0001] The invention relates to the technical field of travel switches, in particular to a trigger device of a travel switch. Background Art

[0002] In the field of modern industrial automation and mechanical control, the travel switch plays a vital role. The travel switch is a control device that switches the circuit state according to the travel position of the moving part. In the traditional mechanical system, it is often necessary to accurately control the travel range of the moving part to ensure the safe operation and efficient work of the equipment, and the trigger device of the travel switch is the key part to achieve this control. With the continuous development of industrial technology, higher requirements are put forward for the accuracy, reliability and response speed of the travel switch trigger device. In some high-precision automated production lines, a small travel error may lead to a decline in product quality or equipment failure. For example, the announcement number CN115295333A discloses a quick-installed travel switch, including: a travel switch body and a locking part; the travel switch body is a cylindrical structure; the locking part includes: a housing, a locking block and an adjusting nut; the housing is sleeved with the travel switch body; the locking block is slidably connected to the housing, the adjusting nut is screwed to the housing, the locking block abuts against the adjusting nut, and the locking block is provided with an escape space corresponding to the cylindrical structure, and the surface of the escape space is provided with a threaded structure. Thus, the present invention has a simple structure, and uses the adjusting nut to control the meshing and separation of the threaded structure to achieve rapid tightening and releasing of the travel switch, thereby improving work efficiency and reducing the labor intensity of the staff. The travel switch can be tightened without the aid of a wrench, and a locking function is added to prevent the travel switch from loosening during use.

[0003] Although the travel switch in the prior art can meet the needs of use, the outer body of the existing travel switch is relatively fragile and cannot be used in harsh environments. In addition, there are some precise electrical components inside the travel switch that are easily affected by dust and rain, which may lead to product quality degradation or equipment failure. It is not only easy to be damaged but also inconvenient to repair and consumes a lot of time. At the same time, some travel switches are prone to incorrect judgments due to insufficient spacing when in use, affecting product production. Summary of the invention

[0004] The purpose of the present invention is to provide a trigger device for a travel switch to solve the problem mentioned in the above background technology that the existing travel switch has a fragile outer body and cannot be used in harsh environments, and there are some precise electrical components inside the travel switch that are easily affected by dust, rain, etc., which may lead to product quality degradation or equipment failure. It is not only easy to be damaged but also inconvenient to repair and consumes a lot of time. At the same time, some travel switches are prone to wrong judgments due to insufficient spacing when in use, which affects product production.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a trigger device of a travel switch, comprising a protective shell and a travel switch body, wherein the interior of the protective shell clamps the travel switch body and is fixed with fixing bolts on both sides, the protective shell is composed of an upper protective cover and a lower protective cover, the upper protective cover and the lower protective cover have the same structure and are mirror-jointed, a clamping mechanism is installed at the center of the upper protective cover and the lower protective cover to clamp the limit travel switch body, a dustproof mechanism and a trigger mechanism are inserted at the left end of the protective shell, and the dustproof mechanism includes an upper A connecting piece and a fixed plate, the right side of the upper connecting piece is inserted into the left wall of the upper protective cover, the left wall of the upper connecting piece is fixed with a fixed plate, a touch component is installed on the left side of the bottom end of the fixed plate, and a dustproof component is installed on the right side of the bottom end of the fixed plate. The touch component drives the dustproof component to work by driving the linkage component. The trigger mechanism consists of a lower connecting piece and a trigger component. The right end of the lower connecting piece is inserted into the left wall of the lower protective cover, and the trigger component is installed on the upper side of the left end of the lower connecting piece. The operation of the touch component can drive the trigger component to stimulate the travel switch body to work.

[0006] Preferably, both central walls of the upper protective cover are provided with side grooves, a limiting groove is provided downwardly through the center of the top end of the upper protective cover, a clamping mechanism is installed in the limiting groove, and two sets of extended inner grooves are provided on the upper side of the left wall of the upper protective cover.

[0007] Preferably, two groups of first rotating shafts are installed on the inner wall of a single group of the extended inner grooves, and a first gear is installed at the center of the single group of the first rotating shafts.

[0008] Preferably, the clamping mechanism includes a circular plate and a screw rod, the circular plate is fixed inside the limiting groove, the center bolt of the circular plate is inserted with a screw rod, the top of the screw rod is fixed with a rotating disk, the bottom end of the screw rod extends to the inside of the upper protective cover, the bottom end of the screw rod is connected to an arc-shaped inner plate, six groups of spherical springs are installed at the bottom end of the arc-shaped inner plate, and the bottom ends of the six groups of spherical springs are connected to the arc-shaped outer plate.

[0009] Preferably, the upper connecting member includes an upper U-shaped block and an upper rack plate, two sets of upper rack plates are fixedly arranged at the front and rear of the right wall of the upper U-shaped block, and two sets of mirror-image L-shaped blocks are respectively installed at the bottom end of the upper U-shaped block.

[0010] Preferably, the touch assembly includes a stopper and a rotating long plate, the stopper is installed on the left side of the bottom end of the fixed plate, a second rotating shaft is installed on the rear center side of the rotating long plate, and the top end of the second rotating shaft is inserted into the top end of the fixed plate.

[0011] Preferably, the linkage assembly includes a first sprocket group and a third rotating shaft, the front end of the first sprocket group is installed on the center of the second rotating shaft, the rear end of the first sprocket group is installed on the bottom side of the third rotating shaft, the top of the third rotating shaft is installed on a fixed plate, a worm wheel is fixed on the upper side of the third rotating shaft, the right end of the worm wheel engages with a worm, the worm is installed at the center of a fourth rotating shaft, both ends of the fourth rotating shaft are installed on the inner walls of two groups of limit blocks, and a second sprocket group is installed at the rear end of the fourth rotating shaft to drive the dustproof assembly to operate.

[0012] Preferably, the dustproof component includes a connecting plate and a limiting sleeve, the right walls of the two groups of connecting plates are installed with a limiting sleeve, the two groups of limiting sleeves are provided with a threaded rod, the center of the threaded rod is fixed with a fixing column, the center of the fixing column is installed with the right end of the second sprocket group, the threaded rods on the front and rear sides of the fixing column are threaded with long barrel nuts, the two groups of long barrel nuts are installed in a mirror-like manner, and the right wall of a single group of long barrel nuts is fixed with a baffle.

[0013] Preferably, the lower connecting member includes a lower U-shaped block and a lower tooth plate, two groups of lower tooth plates are installed on the bottom side of the right end of the lower U-shaped block, the right ends of the two groups of lower tooth plates are inserted into the left wall of the lower protective cover, and the top of the lower U-shaped block is opened with a mirrored L-shaped groove, and the left wall of the lower U-shaped block is installed with a pad.

[0014] Preferably, the trigger assembly includes a trapezoidal guide rail and a trapezoidal slider, the trapezoidal guide rail is installed at the top center of the pad, a trapezoidal slider is inserted into the center of the trapezoidal guide rail, an impact column is fixed to the right wall of the trapezoidal slider, the right end of the impact column is parallel to the left end contact of the travel switch body, and a long tube spring is provided on the right side of the bottom end of the trapezoidal slider to connect with the inner wall of the trapezoidal guide rail.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting two sets of mirror-mounted upper protective covers and lower protective covers, the travel switch body can be quickly protected to reduce the impact of the external environment, increase the service life of the travel switch body and reduce production costs. The clamping mechanism provided inside the upper protective cover and the lower protective cover can clamp and protect the travel switch bodies of different sizes to improve applicability. The travel switch body is clamped by rotating the adjustable arc outer plate through the screw rod in the clamping mechanism, and six sets of spherical spring connections are provided between the arc outer plate and the arc inner plate. This design can reduce the shaking of the travel switch body and improve the stability of operation;

[0017] 2. The upper connecting piece can be quickly installed on the protective housing through the two sets of upper rack plates installed, which is convenient and quick. The touch component can be rotated when the product hits, and then drive the trigger component to activate the travel switch body to work. Through this design, secondary triggering can be performed, which can correspond to some large products and can perform more sensitive operations. At the same time, the service life of the travel switch body is improved. The linkage component can drive the dustproof component to operate in the reverse direction under the rotation of the touch component, so that the operation of the internal travel switch body will not be affected when the trigger mechanism is working, and the dustproof component can be used to dustproof the trigger mechanism when it stops running, thereby reducing the damage to the electrical components inside the travel switch body;

[0018] 3. The lower connecting piece can be connected to the upper connecting piece and installed in the protective shell simultaneously. This device can be flexibly used and installed to improve the applicability of this product in different environments. The trigger component can work under the operation of the touch component, and the long spring inside can rebound after work to save time for the next work and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a front view schematic diagram of the present invention;

[0021] Figure 2 It is a partial split schematic diagram of the present invention;

[0022] Figure 3 It is an exploded schematic diagram of the main structure of the present invention;

[0023] Figure 4 It is a side cross-sectional schematic diagram of the upper protective cover of the present invention;

[0024] Figure 5 For the present invention Figure 4 Rear side cross-sectional view;

[0025] Figure 6 It is a schematic diagram of assembling the dustproof mechanism and the trigger mechanism of the present invention;

[0026] Figure 7 It is a top view schematic diagram of the trigger mechanism of the present invention;

[0027] Figure 8 A bottom view schematic diagram of the dustproof mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 Schematic diagram of the dustproof component structure from above;

[0029] Fig.10 For the present invention Figure 8 Schematic diagram of the structure of the linkage component and the touch component.

[0030] In the figure: 1. protective shell; 11. upper protective cover; 111. side groove; 112. limit groove; 113. extended inner groove; 114. first rotating shaft; 115. first gear; 12. lower protective cover; 13. clamping mechanism; 131. round plate; 132. screw rod; 133. rotating disk; 134. arc-shaped inner plate; 135. spherical spring; 136. arc-shaped outer plate; 2. fixing bolt; 3. travel switch body; 4. dustproof mechanism; 41. upper connecting piece; 411. upper U-shaped block; 412. L-shaped block; 413. upper rack plate; 42. fixing plate; 43. touch assembly; 431. stopper; 432. second rotating shaft; 433. rotating Moving long plate; 44, linkage assembly; 441, first sprocket group; 442, third rotating shaft; 443, worm wheel; 444, worm; 445, fourth rotating shaft; 446, limit block; 447, second sprocket group; 45, dustproof assembly; 451, connecting plate; 452, limit sleeve; 453, threaded rod; 454, fixing column; 455, long tube nut; 456, baffle; 5, trigger mechanism; 51, lower connecting piece; 511, lower U-shaped block; 512, L-shaped groove; 513, lower tooth plate; 514, pad; 52, trigger assembly; 521, trapezoidal guide rail; 522, trapezoidal slider; 523, impact column; 524, long tube spring. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-Figure 10The present invention provides an embodiment: a trigger device of a travel switch, comprising a protective shell 1 and a travel switch body 3, wherein the interior of the protective shell 1 is clamped with the travel switch body 3 and is fixed with fixing bolts 2 on both sides, the protective shell 1 is composed of an upper protective cover 11 and a lower protective cover 12, the upper protective cover 11 and the lower protective cover 12 have the same structure and are mirror-jointed, a clamping mechanism 13 is installed at the center of the upper protective cover 11 and the lower protective cover 12 to clamp the limit travel switch body 3, a dustproof mechanism 4 and a trigger mechanism 5 are inserted at the left end of the protective shell 1, and the dustproof mechanism 4 includes an upper connecting member 41 and a fixing plate 42, the right side of the upper connecting member 41 is inserted into the left wall of the upper protective cover 11, the left wall of the upper connecting member 41 is fixed with a fixing plate 42, the left side of the bottom end of the fixing plate 42 is installed with a touch assembly 43, the right side of the bottom end of the fixing plate 42 is installed with a dustproof assembly 45, the touch assembly 43 drives the dustproof assembly 45 to work by driving the linkage assembly 44, the trigger mechanism 5 is composed of a lower connecting member 51 and a trigger assembly 52, the right end of the lower connecting member 51 is inserted into the left wall of the lower protective cover 12, the upper side of the left end of the lower connecting member 51 is installed with a trigger assembly 52, the operation of the touch assembly 43 can drive the trigger assembly 52 to stimulate the travel switch body 3 to work.

[0033] As a further feature of the present invention, side grooves 111 are provided on both central walls of the upper protective cover 11, a limiting groove 112 is provided downwardly through the center of the top end of the upper protective cover 11, a clamping mechanism 13 is installed in the limiting groove 112, two groups of extended inner grooves 113 are relatively provided on the upper side of the left wall of the upper protective cover 11, two groups of first rotating shafts 114 are installed on the inner walls of the single group of extended inner grooves 113, and a first gear 115 is installed in the center of the single group of first rotating shafts 114. This design is beneficial to the rapid installation of the dustproof mechanism and the trigger mechanism to improve efficiency.

[0034] Furthermore, the clamping mechanism 13 includes a circular plate 131 and a screw rod 132. The circular plate 131 is fixed inside the limiting groove 112. The central bolt of the circular plate 131 is inserted with the screw rod 132. The top of the screw rod 132 is fixed with a rotating disk 133. The bottom end of the screw rod 132 extends to the inside of the upper protective cover 11. The bottom end of the screw rod 132 is connected to an arc-shaped inner plate 134. Six groups of spherical springs 135 are installed at the bottom end of the arc-shaped inner plate 134. The bottom ends of the six groups of spherical springs 135 are connected to the arc-shaped outer plate 136. Through this design, not only can the travel switch bodies 3 of different sizes be clamped, but also shock absorption can be performed to prevent damage to internal parts.

[0035] Furthermore, the upper connecting member 41 includes an upper U-shaped block 411 and an upper rack plate 413. Two groups of upper rack plates 413 are fixedly arranged on the front and rear of the right wall of the upper U-shaped block 411. Two groups of mirror-image L-shaped blocks 412 are respectively installed at the bottom end of the upper U-shaped block 411. The touch component 43 includes a stopper 431 and a rotating long plate 433. The stopper 431 is installed on the left side of the bottom end of the fixed plate 42. A second rotating shaft 432 is installed on the rear side of the center of the rotating long plate 433. The top end of the second rotating shaft 432 is inserted into the top end of the fixed plate 42. Through this design, thrust can be generated when an object hits to drive the trigger mechanism to work.

[0036] As a further feature of the present invention, the linkage assembly 44 includes a first sprocket group 441 and a third rotating shaft 442. The front end of the first sprocket group 441 is installed at the center of the second rotating shaft 432, the rear end of the first sprocket group 441 is installed at the bottom side of the third rotating shaft 442, the top of the third rotating shaft 442 is installed on the fixed plate 42, a worm wheel 443 is fixed on the upper side of the third rotating shaft 442, the right end of the worm wheel 443 is engaged with a worm 444, the worm 444 is installed at the center of the fourth rotating shaft 445, both ends of the fourth rotating shaft 445 are installed on the inner walls of two groups of limit blocks 446, and a second sprocket group 447 is installed at the rear end of the fourth rotating shaft 445 to drive the dustproof assembly 45 to operate. The dustproof assembly 45 includes a connecting plate 451 and a limiting sleeve 452. The two groups of connecting plates The right wall of 451 is installed with a limiting sleeve 452, and two groups of limiting sleeves 452 are provided with a threaded rod 453. A fixing column 454 is fixedly provided at the center of the threaded rod 453. The right end of the second sprocket group 447 is installed at the center of the fixing column 454. Long barrel nuts 455 are threadedly sleeved in the threaded rods 453 on the front and rear sides of the fixing column 454. The two groups of long barrel nuts 455 are installed in a mirror image. A baffle 456 is fixedly provided on the right wall of a single group of long barrel nuts 455. Through the provided linkage component, the dustproof component can be driven to operate in the reverse direction under the rotation of the touch component, thereby realizing that the trigger mechanism will not affect the operation of the internal travel switch body when it is working, and the dustproof component can perform dustproof treatment on the trigger mechanism when it stops operating, thereby reducing damage to the electrical components inside the travel switch body.

[0037] Furthermore, the lower connecting member 51 includes a lower U-shaped block 511 and a lower tooth plate 513. Two sets of lower tooth plates 513 are installed on the bottom side of the right end of the lower U-shaped block 511. The right ends of the two sets of lower tooth plates 513 are inserted into the left wall of the lower protective cover 12. The top of the lower U-shaped block 511 is provided with a mirrored L-shaped groove 512. The left wall of the lower U-shaped block 511 is installed with a pad 514. The trigger assembly 52 includes a trapezoidal guide rail 521 and a trapezoidal slider 522. The trapezoidal guide rail 521 is installed on the left wall of the lower protective cover 12. A trapezoidal slider 522 is inserted in the center of the top of the pad 514 and the center of the trapezoidal guide rail 521. A collision column 523 is fixed to the right wall of the trapezoidal slider 522. The right end of the collision column 523 is parallel to the left end contact of the travel switch body 3. A long cylinder spring 524 is provided on the right side of the bottom end of the trapezoidal slider 522 and connected to the inner wall of the trapezoidal guide rail 521. While facilitating installation, the long cylinder spring can rebound under force to save time and improve work efficiency for the next work.

[0038] Working principle: During operation, when the travel switch body 3 needs to be installed, first place the left end of the travel switch body 3 inside the lower protective cover 12 for engagement, then the upper protective cover 11 can be covered on the travel switch body 3, then the fixing bolts 2 are used to thread and fix through the side grooves 111, then the rotating disks 133 at the tops of the upper protective cover 11 and the lower protective cover 12 are rotated respectively, and the rotation of the rotating disk 133 can drive the connected screw rod 132 to rotate and descend in the inner thread of the circular plate 131, and the descent of the screw rod 132 can drive the arc-shaped inner plate 134 sleeved at the bottom end to descend, and the arc-shaped outer plate 136 connected to the bottom end of the arc-shaped inner plate 134 through six sets of spherical springs 135 can descend to clamp and limit the travel switch body 3, and then the installation can be carried out;

[0039] During operation, when encountering bad weather or needing large goods, firstly, the upper U-shaped block 411 and the lower U-shaped block 511 at the bottom are engaged, and then the upper rack plate 413 and the lower rack plate 513 installed at the rear side are inserted into the extended inner groove 113, and when the upper rack plate 413 and the lower rack plate 513 extend to the inside, they can mesh with the first gear 115 installed in the internal first rotating shaft 114 to engage and limit, and then the installation is completed. Then, when the object collides with the rotating long plate 433, the rotating long plate 433 is rotated. The rear end of the second rotating shaft 442 can be rotated within the rear side to limit the rotation, and the trapezoidal slider 522 can be pushed to move rightward in the trapezoidal guide rail 521. When the trapezoidal slider 522 moves to the right, it can drive the impact column 523 fixed on the right side of the top to move rightward synchronously. When the impact column 523 moves, the first sprocket group 441 installed in the center of the second device 442 rotates to drive the third rotating shaft 442 connected to the rear end to rotate. When the third rotating shaft 442 rotates, it can drive the worm wheel 443 at the top to rotate. The worm wheel 443 rotates to engage the worm 444 at the right end to rotate in the fourth rotating shaft 445. The fourth rotating shaft 445 rotates in the limiting block 446 to drive the second sprocket set 447 connected to the rear end to drive the fixed column 454 in the dustproof component 45 to rotate. The fixed column 454 rotates to drive the threaded rod 453 to rotate in the limiting sleeve 452. When the threaded rod 453 rotates, it can drive the two sets of relatively installed long barrel nuts 455 to move relatively to the outside, and the long barrel nuts 45 The baffle plate 456 installed at the right end can be opened to expose the contact of the travel switch body 3, and then the impact column 523 can impact the travel switch body 3 to operate. When the object is removed, the trapezoidal slider 522 rebounds to the original position under the elastic force of the long tube spring 524, and the trapezoidal slider 522 can push the rotating long plate 433 to the original position. The rotating long plate 433 is reset to drive the linkage component 44 to drive the dustproof component 45 to operate in the reverse direction, that is, the two sets of baffle plates 456 are restored to the original position to prevent dust from the contacts of the travel switch body 3.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A trigger device for a travel switch, comprising a protective housing (1) and a travel switch body (3), wherein the protective housing (1) holds the travel switch body (3) and is provided with fixing bolts (2) on both sides for fixing, characterized in that: The protective housing (1) is composed of an upper protective cover (11) and a lower protective cover (12). The upper protective cover (11) and the lower protective cover (12) have the same structure and are mirror-jointed. A clamping mechanism (13) is installed at the center of each of the upper protective cover (11) and the lower protective cover (12) to clamp the limit travel switch body (3). The left end of the protective housing (1) is inserted and connected with a dustproof mechanism (4) and a trigger mechanism (5). The dustproof mechanism (4) includes an upper connecting member (41) and a fixing plate (42). The right side of the upper connecting member (41) is inserted into the left wall of the upper protective cover (11). The left wall of the upper connecting member (41) is fixedly provided with a fixing plate (42). The fixing plate (42) comprises a touch assembly (43) installed on the left side of the bottom end of the fixing plate (42), a dustproof assembly (45) installed on the right side of the bottom end of the fixing plate (42), the touch assembly (43) drives the dustproof assembly (45) to work by driving the linkage assembly (44), the trigger mechanism (5) comprises a lower connecting member (51) and a trigger assembly (52), the right end of the lower connecting member (51) is inserted into the left wall of the lower protective cover (12), the trigger assembly (52) is installed on the upper side of the left end of the lower connecting member (51), and the operation of the touch assembly (43) can drive the trigger assembly (52) to stimulate the travel switch body (3) to work; The upper connecting member (41) comprises an upper U-shaped block (411) and an upper rack plate (413), two sets of upper rack plates (413) are fixedly arranged at the front and rear of the right wall of the upper U-shaped block (411), and two sets of mirror-image L-shaped blocks (412) are respectively installed at the bottom end of the upper U-shaped block (411); The touch assembly (43) comprises a stopper (431) and a rotating long plate (433), wherein the stopper (431) is installed on the left side of the bottom end of the fixed plate (42), and a second rotating shaft (432) is installed on the rear center side of the rotating long plate (433), and the top end of the second rotating shaft (432) is inserted into the top end of the fixed plate (42); The linkage assembly (44) comprises a first sprocket group (441) and a third rotating shaft (442), wherein the front end of the first sprocket group (441) is mounted on the center of the second rotating shaft (432), the rear end of the first sprocket group (441) is mounted on the bottom side of the third rotating shaft (442), the top end of the third rotating shaft (442) is mounted on the fixed plate (42), a worm wheel (443) is fixed on the upper side of the third rotating shaft (442), the right end of the worm wheel (443) is engaged with a worm screw (444), the worm screw (444) is mounted on the center of a fourth rotating shaft (445), both ends of the fourth rotating shaft (445) are mounted on the inner walls of two groups of limit blocks (446), and a second sprocket group (447) is mounted on the rear end of the fourth rotating shaft (445) to drive the dustproof assembly (45) to operate; The dustproof component (45) comprises a connecting plate (451) and a limiting sleeve (452). The right walls of the two groups of connecting plates (451) are both installed with limiting sleeves (452). The two groups of limiting sleeves (452) are provided with threaded rods (453). A fixing column (454) is fixedly provided at the center of the threaded rod (453). The right end of the second sprocket group (447) is installed at the center of the fixing column (454). Long barrel nuts (455) are threadedly sleeved in the threaded rods (453) at the front and rear sides of the fixing column (454). The two groups of long barrel nuts (455) are installed in a mirror-image manner. A baffle (456) is fixedly provided on the right wall of a single group of long barrel nuts (455). The lower connecting member (51) comprises a lower U-shaped block (511) and a lower tooth plate (513); two groups of lower tooth plates (513) are installed on the bottom side of the right end of the lower U-shaped block (511); the right ends of the two groups of lower tooth plates (513) are inserted into the left wall of the lower protective cover (12); the top of the lower U-shaped block (511) is provided with a mirrored L-shaped groove (512); and a pad (514) is installed on the left wall of the lower U-shaped block (511).

2. A trigger device for a travel switch according to claim 1, characterized in that: The central walls of the upper protective cover (11) are both provided with side grooves (111), the top center of the upper protective cover (11) is provided with a limiting groove (112) penetrating downward, a clamping mechanism (13) is installed in the limiting groove (112), and two groups of extended inner grooves (113) are provided on the upper side of the left wall of the upper protective cover (11).

3. A trigger device for a travel switch according to claim 2, characterized in that: Two sets of first rotating shafts (114) are installed on the inner wall of each set of the extended inner grooves (113), and a first gear (115) is installed at the center of each set of the first rotating shafts (114).

4. A trigger device for a travel switch according to claim 1, characterized in that: The clamping mechanism (13) comprises a circular plate (131) and a screw rod (132); the circular plate (131) is fixed inside the limiting groove (112); the central bolt of the circular plate (131) is inserted with the screw rod (132); a rotating disk (133) is fixed at the top of the screw rod (132); the bottom end of the screw rod (132) extends to the inside of the upper protective cover (11); the bottom end of the screw rod (132) is connected to an arc-shaped inner plate (134); six groups of spherical springs (135) are installed at the bottom end of the arc-shaped inner plate (134); the bottom ends of the six groups of spherical springs (135) are connected to an arc-shaped outer plate (136).

5. A trigger device for a travel switch according to claim 1, characterized in that: The trigger assembly (52) comprises a trapezoidal guide rail (521) and a trapezoidal slider (522); the trapezoidal guide rail (521) is mounted at the top center of the pad (514); a trapezoidal slider (522) is inserted into the center of the trapezoidal guide rail (521); a collision column (523) is fixed to the right wall of the trapezoidal slider (522); the right end of the collision column (523) is parallel to the left end contact of the travel switch body (3); and a long tube spring (524) is provided on the right side of the bottom end of the trapezoidal slider (522) and connected to the inner wall of the trapezoidal guide rail (521).

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