Waterproof structure of travel switch

By setting up waterproof seals at the head through hole of the stroke switch, the problem of water seepage in the existing stroke switch is solved, and the IP67 waterproof level is achieved to ensure the normal operation of the equipment and avoid failures.

CN222851298UActive Publication Date: 2025-05-09ZHEJIANG KACON ELECTRIC
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Patent Information

Application Number
CN202421827698.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-30
Publication Date
2025-05-09
Estimated Expiration
2034-07-30

AI Technical Summary

Technical Problem

The head base and contact base of the existing stroke switch lack effective waterproof structure, which leads to easy liquid infiltration in wet environments, affecting the short circuit of the conductive parts and leading to equipment failure.

Method used

A stroke switch waterproof structure is designed. By setting a waterproof seal at the head through hole, including connecting rings and rubber waterproof sleeves, it is necessary to ensure that a seal is formed between the outer surface of the waterproof seal and the inner wall surface of the head through holes, and locked and fixed by fixing bolts to achieve the IP67 waterproof level.

Benefits of technology

Effectively prevent liquid infiltration, ensure that the stroke switch can still work normally in wet environments, avoid short circuits and equipment failures, and have reasonable structure design, simple and good sealing performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a travel switch waterproof structure, which comprises a head base and a contact seat base, a head through hole is arranged on the end face of the contact seat base, which is aligned with the head base, a cover plate is arranged at the outer port of the head through hole, a hollow cylinder is integrally arranged on the inner end face of the cover plate, and the hollow cylinder is arranged on the inner end face of the cover plate. The hollow cylinder is sleeved with a waterproof sealing piece, the waterproof sealing piece is arranged in the head through hole in an embedded mode, sealing is formed between the outer surface of the waterproof sealing piece and the inner wall face of the head through hole, and the inner end of the waterproof sealing piece is a closed end. An electrical assembly is arranged in the contact seat base, a push rod movable assembly is arranged in the head base, and the electrical assembly and the push rod movable assembly are separated through a waterproof sealing piece. According to the technical scheme, the structure design is reasonable, the structure is simple, the sealing performance is good, the IP67 waterproof grade can be reached, and the practicability is good.
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Description

Technical Field

[0001] The utility model relates to the technical field of travel switches, in particular to a waterproof structure of a travel switch. Background Art

[0002] A travel switch, also known as a limit switch, is a type of position switch and a commonly used low-current master electrical appliance. It uses the collision of the moving parts of the production machinery to cause its contacts to move to connect or disconnect the control circuit and achieve a certain control purpose. Usually, this type of switch is used to limit the position or stroke of mechanical movement, so that the moving machinery can automatically stop, reverse, change speed, or automatically reciprocate at a certain position or stroke.

[0003] There are still deficiencies in the existing travel switch structure: the head base and the contact seat base of the existing travel switch have no waterproof structure, and only an O-ring is set on the push rod. The O-ring makes the push rod and the contact seat base only slightly waterproof and can only work in environments below IPX5. Poor sealing can easily cause liquid to penetrate into the contact seat base, thereby affecting the internal conductive part of the travel switch to short-circuit, affecting normal operation and causing equipment failure and other hazards. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a travel switch waterproof structure with reasonable structural design, simple structure, good sealing performance, capable of achieving IP67 waterproof grade and good practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waterproof structure of a travel switch, including a head base and a contact seat base, a head through hole is arranged on the end face of the contact seat base aligned with the head base, a cover plate is arranged on the outer port of the head through hole, a hollow cylinder is integrally arranged on the inner end face of the cover plate, a waterproof seal is sleeved on the hollow cylinder, the waterproof seal is embedded in the head through hole, a seal is formed between the outer surface of the waterproof seal and the inner wall surface of the head through hole, and the inner end of the waterproof seal is a closed end; an electrical component is arranged in the contact seat base, a push rod movable component is arranged in the head base, and the electrical component and the push rod movable component are separated by the waterproof seal.

[0006] The utility model is further configured as follows: the head through hole is a stepped hole, the outer end of the head through hole is provided with a stepped surface, the waterproof sealing component comprises a connecting ring and a rubber waterproof sleeve, the inner end of the connecting ring is integrally arranged with the outer end of the rubber waterproof sleeve; the connecting ring is sealingly connected to the stepped surface of the head through hole, a seal is formed between the inner surface of the rubber waterproof sleeve and the outer surface of the hollow cylinder, and a screw positioning groove is provided in the middle of the inner end surface of the rubber waterproof sleeve.

[0007] The utility model is further configured as follows: the push rod movable assembly in the head base includes a rotating shaft, a pressure block, a push rod and a return spring, the pressure block is arranged between the rotating shaft and the push rod, the return spring is sleeved on the push rod, a spring positioning groove is arranged in the middle of the left end surface of the cover plate, the spring positioning groove is connected to the central through hole of the hollow cylinder, the left end of the return spring is connected to the pressure block, and the right end of the return spring is connected to the inner wall surface of the spring positioning groove; the left end of the push rod is connected to the pressure block, and the right end of the push rod passes through the spring positioning groove and the hollow cylinder in sequence and then is connected to the inner wall surface of the rubber waterproof sleeve.

[0008] The utility model is further configured as follows: the electrical components in the contact seat base include a contact seat, a slider is arranged in the contact seat, an adjusting screw is arranged at the left end of the slider, the adjusting screw is arranged to align with the inner end surface of the rubber waterproof sleeve, a spring is arranged at the right end of the slider, a moving spring is arranged on the spring, and after the spring is deformed, the position of the moving spring is switched from normally closed to normally open, so that the contact seat completes the on-off conversion.

[0009] The utility model is further configured as follows: a rubber sealing cover is detachably provided on the right end surface of the contact seat base, an upper cover is provided on the upper end of the contact seat base, a sealing gasket is provided between the upper cover and the upper end surface of the contact seat base, the upper cover and the upper end surface of the contact seat base are connected and fixed by screws, and the sealing gasket is pressed when the upper cover is locked.

[0010] The utility model is further configured as follows: the head through hole is arranged on the left end surface of the contact seat base, the head base is arranged at the left end of the cover plate, a plurality of fixing bolts are arranged between the head base, the cover plate and the contact seat base, and the head base, the cover plate and the contact seat base are locked and fixed by the fixing bolts.

[0011] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model has a reasonable structural design, a seal is formed between the outer surface of the waterproof seal and the inner wall surface of the head through hole, and the inner end of the waterproof seal is a closed end, and the electrical components in the contact seat base and the push rod movable components in the head base are separated by the waterproof seal; the waterproof effect is not affected when the push rod moves, the structure is simple, the sealing performance is good, the IP67 waterproof grade can be achieved, and the practicability is good.

[0012] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0015] Figure 3 It is an exploded schematic diagram of an embodiment of the utility model;

[0016] Figure 4 It is a partial structural schematic diagram of an embodiment of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the cover plate of an embodiment of the utility model;

[0018] Figure 6 It is a schematic structural diagram of a waterproof seal according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] See also Figures 1 to 6 The utility model discloses a waterproof structure of a travel switch, comprising a head base 1 and a contact seat base 2, wherein the contact seat base 2 is provided with a head through hole 21 on the end surface aligned with the head base 1, and a cover plate 3 is provided at the outer end of the head through hole 21, and a hollow cylinder 31 is integrally provided on the inner end surface of the cover plate 3, and a waterproof seal 4 is sleeved on the hollow cylinder 31, which is embedded in the head through hole 21, and a seal is formed between the outer surface of the waterproof seal 4 and the inner wall surface of the head through hole 21, and the inner end of the waterproof seal 4 is a closed end; an electrical component is provided in the contact seat base 2, and a push rod movable component is provided in the head base 1, and the electrical component and the push rod movable component are separated by the waterproof seal 4.

[0021] Preferably, the head through hole 21 is a stepped hole, and the outer end of the head through hole 21 is provided with a stepped surface. The waterproof seal 4 includes a connecting ring 41 and a rubber waterproof sleeve 42, and the inner end of the connecting ring 41 is integrally arranged with the outer end of the rubber waterproof sleeve 42; the connecting ring 41 is sealingly connected to the step surface of the head through hole 21, and a seal is formed between the inner surface of the rubber waterproof sleeve 42 and the outer surface of the hollow cylinder 31, and a screw positioning groove 421 is provided in the middle of the inner end surface of the rubber waterproof sleeve 42.

[0022] In order to make the structural design of the utility model more reasonable, as a preferred embodiment, the push rod movable assembly in the head base 1 described in this embodiment includes a rotating shaft 5, a pressure block 6, a push rod 7 and a return spring 8. The pressure block 6 is arranged between the rotating shaft 5 and the push rod 7, and the return spring 8 is sleeved on the push rod 7. A spring positioning groove 32 is arranged in the middle of the left end surface of the cover plate 3, and the spring positioning groove 32 is connected to the central through hole of the hollow cylinder 31. The left end of the return spring 8 is connected to the pressure block 6, and the right end of the return spring 8 is connected to the inner wall surface of the spring positioning groove 32; the left end of the push rod 7 is connected to the pressure block 6, and the right end of the push rod 7 passes through the spring positioning groove 32 and the hollow cylinder 31 in turn and is connected to the inner wall surface of the rubber waterproof sleeve 42.

[0023] The electrical components in the contact seat base 2 include a contact seat 9, a slider 10 is arranged in the contact seat 9, an adjusting screw 11 is arranged at the left end of the slider 10, and the adjusting screw 11 is arranged to align with the inner end surface of the rubber waterproof sleeve 42, and a spring 12 is arranged at the right end of the slider 10, and a moving spring 13 is arranged on the spring 12. After the spring 12 is deformed, the position of the moving spring 13 is switched from normally closed to normally open, so that the contact seat completes the on-off conversion.

[0024] A rubber sealing cover 14 is detachably provided on the right end surface of the contact seat base 2, an upper cover 15 is provided on the upper end of the contact seat base 2, a sealing gasket 16 is provided between the upper cover 15 and the upper end surface of the contact seat base 2, the upper cover 15 and the upper end surface of the contact seat base 2 are fixed by screws, and the sealing gasket 16 is pressed when the upper cover 15 is locked.

[0025] The head through hole 21 is arranged on the left end surface of the contact seat base 2, the head base 1 is arranged on the left end of the cover plate 3, and a plurality of fixing bolts 17 are arranged between the head base 1, the cover plate 3 and the contact seat base 2, and the head base 1, the cover plate 3 and the contact seat base 2 are locked and fixed by the fixing bolts 17. Preferably, a total of four fixing bolts 17 are arranged, and the fixing bolts 17 are distributed in a rectangular shape.

[0026] In actual application, after the rotating shaft 5 rotates, it pushes the pressure block 6 and the push rod 7 by lifting. The push rod 7 pushes the adjusting screw 11 locked on the slider 10. After the spring 12 is deformed, the position of the moving spring 13 is switched from normally closed to normally open, and finally the contact seat completes the on-off conversion; the adjusting screw 11 is locked on the left end face of the slider 10. When assembling the finished product, the depth of the screw 11 can be adjusted to control the trigger angle, ensuring that the trigger angle of the product remains highly consistent when leaving the factory.

[0027] In this embodiment, the outer surface of the waterproof seal 4 and the inner wall surface of the head through hole 21 form a seal, and the inner end of the waterproof seal 4 is a closed end. The electrical components in the contact seat base 2 and the push rod movable components in the head base 1 are separated by the waterproof seal 4;

[0028] When the push rod 7 moves, the rubber waterproof cover 42 of the waterproof seal 4 is elastically deformed. Since the rubber waterproof cover 42 of the waterproof seal 4 is located between the push rod 7 and the adjusting screw 11, the rubber waterproof cover 42 completely isolates the electrical component part in the contact seat base 2 and the push rod movable component part in the head base 1, so that the waterproof effect is not affected when the push rod 7 moves. The structure is reasonable in design, simple in structure, good in sealing performance, can reach IP67 waterproof grade and has good practicality.

[0029] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A travel switch waterproof structure, comprising a head base (1) and a contact seat base (2), characterized in that: A head through hole (21) is arranged on the end surface of the contact seat base (2) aligned with the head base (1); a cover plate (3) is arranged at the outer end of the head through hole (21); a hollow cylinder (31) is integrally arranged on the inner end surface of the cover plate (3); a waterproof seal (4) is sleeved on the hollow cylinder (31); the waterproof seal (4) is embedded in the head through hole (21); the outer surface of the waterproof seal (4) and the inner wall surface of the head through hole (21) form a seal, and the inner end of the waterproof seal (4) is a closed end; an electrical component is arranged in the contact seat base (2); a push rod movable component is arranged in the head base (1); the electrical component and the push rod movable component are separated by the waterproof seal (4).

2. A travel switch waterproof structure according to claim 1, characterized in that: The head through hole (21) is a stepped hole, and the outer end of the head through hole (21) is provided with a stepped surface. The waterproof seal (4) comprises a connecting ring (41) and a rubber waterproof sleeve (42), and the inner end of the connecting ring (41) and the outer end of the rubber waterproof sleeve (42) are integrally provided. The connecting ring (41) is sealedly connected to the stepped surface of the head through hole (21), and a seal is formed between the inner surface of the rubber waterproof sleeve (42) and the outer surface of the hollow cylinder (31), and a screw positioning groove (421) is provided in the middle of the inner end surface of the rubber waterproof sleeve (42).

3. A travel switch waterproof structure according to claim 1 or 2, characterized in that: The push rod movable assembly in the head base (1) comprises a rotating shaft (5), a pressure block (6), a push rod (7) and a return spring (8), wherein the pressure block (6) is arranged between the rotating shaft (5) and the push rod (7), and the return spring (8) is sleeved on the push rod (7). A spring positioning groove (32) is arranged in the middle of the left end surface of the cover plate (3), and the spring positioning groove (32) is communicated with the central through hole of the hollow cylinder (31). The left end of the return spring (8) is connected to the pressure block (6), and the right end of the return spring (8) is connected to the inner wall surface of the spring positioning groove (32); the left end of the push rod (7) is connected to the pressure block (6), and the right end of the push rod (7) passes through the spring positioning groove (32) and the hollow cylinder (31) in sequence and is connected to the inner wall surface of the rubber waterproof sleeve (42).

4. A travel switch waterproof structure according to claim 3, characterized in that: The electrical components in the contact seat base (2) include a contact seat (9), a slider (10) is arranged in the contact seat (9), an adjusting screw (11) is arranged at the left end of the slider (10), and the adjusting screw (11) is arranged to align with the inner end surface of the rubber waterproof sleeve (42), and a spring (12) is arranged at the right end of the slider (10), and a moving spring (13) is arranged on the spring (12), and after the spring (12) is deformed, the position of the moving spring (13) is switched from normally closed to normally open, so that the contact seat (9) completes the on-off switching.

5. A travel switch waterproof structure according to claim 4, characterized in that: A rubber sealing cover (14) is detachably provided on the right end surface of the contact seat base (2); an upper cover (15) is provided on the upper end of the contact seat base (2); a sealing gasket (16) is provided between the upper cover (15) and the upper end surface of the contact seat base (2); the upper cover (15) and the upper end surface of the contact seat base (2) are fixed by screws, and the sealing gasket (16) is pressed when the upper cover (15) is locked.

6. A travel switch waterproof structure according to claim 1 or 5, characterized in that: The head through hole (21) is arranged on the left end surface of the contact seat base (2); the head base (1) is arranged on the left end of the cover plate (3); a plurality of fixing bolts (17) are arranged between the head base (1), the cover plate (3) and the contact seat base (2); the head base (1), the cover plate (3) and the contact seat base (2) are locked and fixed by the fixing bolts (17).