A travel switch housing

Abstract

The utility model discloses a travel switch shell, including shell main part (1), be equipped with a plurality of mounting hole (2) on shell main part (1), the mounting hole (2) is provided with smooth surface part (3) and screw portion (4) along the axial arrangement, just screw portion (4) set up below smooth surface part (3). The utility model good versatility can adapt to different installation environment, convenient installation also reduced use cost.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a limit switch housing. Background Technology

[0002] Limit switches, also known as position switches, are a type of commonly used low-current control electrical device. They utilize the impact of moving parts in production machinery to actuate their contacts, thereby connecting or disconnecting control circuits to achieve specific control objectives. Typically, these switches are used to limit the position or travel of mechanical movement, causing the machinery to automatically stop, reverse, change speed, or automatically reciprocate at a certain position or travel distance.

[0003] Limit switches can be installed on relatively stationary objects (such as fixed frames, door frames, etc., referred to as stationary objects) or moving objects (such as vehicles, doors, etc., referred to as moving objects). When a moving object approaches a stationary object, the switch's linkage drives the switch contacts, causing closed contacts to open or open contacts to close. The change in the open / closed state of the switch contacts controls the operation of the circuit and mechanism.

[0004] Currently, limit switches are primarily installed using screw connections. Specifically, a through hole is made in the limit switch housing for the screw to pass through, and a screw hole is made at the mounting location for the screw to screw into. When the limit switch is placed in the mounting position, the screw is passed through the through hole in the limit switch housing and then screwed into the screw hole at the mounting location, tightening the screw to complete the installation. However, in certain environments, such as when the limit switch needs to be installed inside a cabinet with limited space, the screw must be screwed in from the outside of the cabinet. In this case, a limit switch housing with mounting screw holes is required to secure the limit switch inside the cabinet when the screw is tightened. Therefore, this type of limit switch housing has poor versatility, and finding a way to facilitate installation in different environments has become a challenge that companies need to overcome. Utility Model Content

[0005] The purpose of this utility model is to provide a limit switch housing. This utility model has good versatility, can adapt to different installation environments, is easy to install, and also reduces the cost of use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a limit switch housing, comprising a housing body; the housing body is provided with a plurality of mounting holes, wherein a smooth part and a threaded part are provided axially within the mounting holes, and the threaded part is located below the smooth part.

[0007] By adopting the above technical solution, the mounting hole on the main body of the limit switch housing is designed with a structure having two parts: a smooth surface and a threaded surface. This allows the limit switch to be installed externally or internally. The mounting screw can penetrate the support surface and engage with the threaded mounting hole on the main body of the limit switch housing, or it can penetrate the mounting hole on the main body of the limit switch housing and engage with the threaded support surface. This provides a variety of installation methods, good versatility, and adaptability to different installation environments, making installation convenient and reducing usage costs.

[0008] The present invention is further configured to include a threaded sleeve, wherein the outer shell body is provided with a mounting groove at the lower end of the mounting hole, the threaded sleeve is detachably installed in the mounting groove, and the threaded portion is provided on the inner circular surface of the threaded sleeve.

[0009] By adopting the above technical solution and replacing the original internal thread design of the mounting hole with a threaded sleeve, there is no need to machine internal threads on the outer shell body. This not only facilitates the processing and production of the outer shell body, but also avoids the problem of increased costs caused by the need to replace the outer shell body due to thread damage. If the threaded part is damaged in the future, only the threaded sleeve needs to be replaced.

[0010] The present invention is further configured such that a positioning block is provided on the outer circular surface of the screw sleeve, and the end of the positioning block away from the smooth surface is a limiting plane perpendicular to the central axis of the screw sleeve, and the end of the positioning block near the smooth surface is a guide slope. A slot is provided on the outer shell body that communicates with the mounting groove, and the positioning block is engaged in the slot.

[0011] By adopting the above technical solution, the screw sleeve and the outer shell body are installed in a snap-fit ​​manner, making the installation operation very convenient.

[0012] The present invention is further configured such that the threaded sleeve is provided with two vertically extending grooves, and the threaded sleeve forms an elastic arm corresponding to the position between the two grooves, and the positioning block is disposed on the outside of the elastic arm.

[0013] By adopting the above technical solution, the elastic arm can deform under the action of external force. When installing the screw sleeve, the positioning block is squeezed by the inner wall of the installation groove, causing the elastic arm to deform inward until the positioning block is locked into the slot. The elastic arm returns to its original shape. When disassembly is required, it is only necessary to use the push rod tool to push the positioning block inward out of the slot, deform the elastic arm, and then pull out the screw sleeve. The disassembly and assembly operation is very convenient.

[0014] The present invention is further provided with a guide groove extending vertically on the inner side of the mounting groove for the positioning block to slide into the slot, and an inlet slope is provided at the outer end of the guide groove.

[0015] By adopting the above technical solution, it is convenient to guide the positioning block on the screw sleeve during installation, so that it can slide into the bayonet quickly and accurately.

[0016] The present invention is further configured such that a limiting groove is provided at the lower end of the mounting groove corresponding to the outer shell body, and an annular flange extending outward and fitting with the limiting groove is provided at the lower end of the threaded sleeve.

[0017] By adopting the above technical solution, the axial insertion limit position of the screw sleeve is limited, so that the positioning block on the bushing can be just locked into the bayonet of the outer shell body.

[0018] The present invention is further configured such that a circular groove is provided at the lower end of the annular flange, and an annular magnet is interference-fitted into the circular groove, wherein the inner diameter of the annular magnet is smaller than the inner diameter of the threaded sleeve.

[0019] By adopting the above technical solution, an annular magnet is set at the lower end of the annular flange, which can temporarily magnetically fix the limit switch to the metal support surface, especially the top side of the metal cabinet. There is no need for another person to hold the limit switch. After the mounting hole is aligned, the outer screw is screwed in for installation. The installation operation is very convenient. In addition, the annular magnet is installed in the circular groove at the lower end of the annular flange by interference fit, which is not only convenient to install, but also very firm.

[0020] The present invention is further configured such that a plurality of anti-loosening protrusions are provided on the inner circular surface of the circular groove, and the anti-loosening protrusions abut against the outer circular surface of the annular magnet.

[0021] By adopting the above technical solution, the anti-loosening protrusions press against the annular magnet, increasing the local stress on the outer circumference of the annular magnet and further improving the stability of the annular magnet installation.

[0022] The present invention is further provided that the outer shell body is provided with a support protrusion at the position corresponding to the lower end of the mounting hole, and the support protrusion protrudes from the lower end surface of the outer shell body.

[0023] By adopting the above technical solution, when installing the limit switch, the support protrusion raises the entire housing body, creating a gap between the bottom surface of the housing body (excluding the support protrusion) and the support surface, which improves both heat dissipation and moisture resistance. Attached Figure Description

[0024] Figure 1 This is a perspective view of the entire utility model; Figure 2 This is a front view of the entire utility model; Figure 3 for Figure 2 AA section view; Figure 4for Figure 3 Enlarged structural diagram of section A in the middle; Figure 5 This is an exploded view of the entire utility model; Figure 6 This is a schematic diagram of the structure of the screw sleeve of this utility model; Figure 7 This is a schematic diagram of the guide groove of this utility model.

[0025] In the diagram: 1. Outer shell body; 2. Mounting hole; 3. Smooth surface; 4. Threaded part; 5. Screw sleeve; 6. Mounting groove; 7. Positioning block; 8. Limiting plane; 9. Guide slope; 10. Bayonet; 11. Broken groove; 12. Elastic arm; 13. Guide groove; 14. Inlet slope; 15. Limiting groove; 16. Annular flange; 17. Circular groove; 18. Annular magnet; 19. Anti-loosening protrusion; 20. Support protrusion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: As attached Figures 1-7 The illustration shows a limit switch housing, comprising a housing body 1. The housing body 1 has multiple mounting holes 2; in this embodiment, there are four mounting holes 2 located at the four corners of the housing body 1. Each mounting hole 2 has an axially arranged smooth surface 3 and a threaded portion 4, with the threaded portion 4 positioned below the smooth surface 3. Designing the mounting holes 2 on the limit switch housing body 1 with both smooth surface 3 and threaded portion 4 allows for both external and internal installation of the limit switch. The mounting screws can penetrate the supporting surface and thread into the mounting holes 2 on the limit switch housing body 1, or they can penetrate the mounting holes 2 on the limit switch housing body 1 and thread into the supporting surface. This provides diverse installation methods, good versatility, adaptability to different installation environments, convenient installation, and reduced operating costs.

[0028] The aforementioned threaded portion 4 can be directly installed on the inner wall of the mounting hole 2 of the outer casing body 1, or it can be installed in the mounting hole 2 in a split structure.

[0029] The specific structure of the split threaded section 4 is as follows: As attached Figures 1-7As shown, the limit switch housing also includes a threaded sleeve 5. The housing body 1 has a mounting groove 6 at the lower end corresponding to the mounting hole 2. The mounting groove 6 is a circular groove with an inner diameter larger than the inner diameter of the smooth surface part 3, and it is coaxial with the mounting hole 2. The threaded sleeve 5 is detachably installed in the mounting groove 6. The threaded portion 4 is located on the inner circular surface of the threaded sleeve 5, meaning the threaded sleeve 5 is a sleeve structure with internal threads. By using the threaded sleeve 5 to replace the original internal thread design of the mounting hole 2, there is no need to machine internal threads on the housing body 1. This not only facilitates the processing and production of the housing body 1 but also avoids the increased cost caused by replacing the housing body 1 due to thread damage. If the threaded portion 4 is subsequently damaged, only the threaded sleeve 5 needs to be replaced.

[0030] As attached Figures 1-7 As shown, a positioning block 7 is integrally formed on the outer circumference of the threaded sleeve 5. The end of the positioning block 7 away from the smooth surface 3 is a limiting plane 8 perpendicular to the central axis of the threaded sleeve 5, and the end of the positioning block 7 near the smooth surface 3 is a guide slope 9. A latch 10 communicating with the mounting groove 6 is provided on the outer shell body 1. The positioning block 7 is engaged in the latch 10. The limiting plane 8 abuts against the inner wall of the latch 10 to prevent the threaded sleeve 5 from axially loosening out of the mounting groove 6. The guide slope 9 guides the positioning block 7, facilitating its sliding into the mounting hole 2. Through this latching engagement, the threaded sleeve 5 and the outer shell body 1 are installed together, making the installation operation very convenient.

[0031] As attached Figure 6 As shown, the threaded sleeve 5 has two vertically extending grooves 11. An elastic arm 12 is formed between the two grooves 11, and the positioning block 7 is located on the outside of the elastic arm 12. The elastic arm 12 can deform under external force. When installing the threaded sleeve 5, the positioning block 7 is squeezed by the inner wall of the installation groove 6, causing the elastic arm 12 to deform inward until it engages with the slot 10. The elastic arm 12 then returns to its original shape. For disassembly, simply use a pusher tool to push the positioning block 7 inward out of the slot 10, deforming the elastic arm 12, and then pull out the threaded sleeve 5. The disassembly and assembly operations are very convenient.

[0032] As attached Figure 7 As shown, the mounting groove 6 has a vertically extending guide groove 13 on its inner side for the positioning block 7 to slide into the bayonet 10. The width of the guide groove 13 is approximately the same as the width of the positioning block 7, and the outer end of the guide groove 13 has an inlet slope 14. This design facilitates the guidance of the positioning block 7 on the screw sleeve 5 during installation, allowing it to slide quickly and accurately into the bayonet 10.

[0033] As attached Figure 4As shown, the outer shell body 1 has a limiting groove 15 at the lower end of the mounting groove 6, and the lower end of the threaded sleeve 5 has an annular flange 16 extending outward and fitting with the limiting groove 15. The axial insertion limit position of the threaded sleeve 5 is limited so that the positioning block 7 on the bushing can be just locked into the bayonet 10 of the outer shell body 1.

[0034] As attached Figure 4 and attached Figure 6 As shown, a circular groove 17 is provided at the lower end of the annular flange 16, and an annular magnet 18 is interference-fitted into the groove 17. The inner diameter of the annular magnet 18 is smaller than the inner diameter of the threaded sleeve 5. The annular magnet 18 at the lower end of the annular flange 16 allows the limit switch to be temporarily magnetically fixed to the metal support surface, especially on the top side of the metal cabinet. This eliminates the need for someone to hold the limit switch; after aligning the mounting hole 2, the outer screw is screwed in for installation, making the installation very convenient. Furthermore, the annular magnet 18 is installed in the circular groove 17 at the lower end of the annular flange 16 via an interference fit, ensuring not only easy installation but also a very secure fit.

[0035] As attached Figure 4 and attached Figure 6 As shown, the inner circular surface of the circular groove 17 is provided with a plurality of anti-loosening protrusions 19, which abut against the outer circular surface of the annular magnet 18. By the anti-loosening protrusions 19 abutting against the annular magnet 18, the local stress on the outer peripheral surface of the annular magnet 18 is increased, further improving the firmness of the installation of the annular magnet 18.

[0036] As attached Figure 1 As shown, the outer casing 1 has a support protrusion 20 at the lower end of the mounting hole 2, and the support protrusion 20 protrudes from the lower end surface of the outer casing 1. When installing the limit switch, the support protrusion 20 raises the entire outer casing 1, creating a gap between the bottom surface of the outer casing 1 (excluding the support protrusion 20) and the supporting surface, which improves both heat dissipation and moisture resistance.

Claims

1. A limit switch housing, comprising a housing body (1); characterized in that: The outer shell body (1) is provided with a plurality of mounting holes (2), and a smooth part (3) and a threaded part (4) are provided in the mounting holes (2) along the axial direction, and the threaded part (4) is provided below the smooth part (3).

2. The limit switch housing according to claim 1, characterized in that: It also includes a screw sleeve (5), and the outer shell body (1) is provided with a mounting groove (6) at the lower end of the mounting hole (2). The screw sleeve (5) is detachably installed in the mounting groove (6), and the threaded part (4) is provided on the inner circle surface of the screw sleeve (5).

3. The limit switch housing according to claim 2, characterized in that: The outer surface of the threaded sleeve (5) is provided with a positioning block (7), and the end of the positioning block (7) away from the smooth surface (3) is a limiting plane (8) perpendicular to the central axis of the threaded sleeve (5). The end of the positioning block (7) close to the smooth surface (3) is a guide slope (9). The outer shell body (1) is provided with a slot (10) that communicates with the mounting groove (6), and the positioning block (7) is engaged in the slot (10).

4. A limit switch housing according to claim 3, characterized in that: The threaded sleeve (5) has two vertically extending grooves (11), and the threaded sleeve (5) forms an elastic arm (12) corresponding to the position between the two grooves (11). The positioning block (7) is located on the outside of the elastic arm (12).

5. A limit switch housing according to claim 4, characterized in that: The mounting groove (6) has a guide groove (13) extending vertically on its inner side for the positioning block (7) to slide into the slot (10), and the outer end of the guide groove (13) has an inlet slope (14).

6. A limit switch housing according to claim 3, characterized in that: The outer shell body (1) is provided with a limiting groove (15) at the lower end of the mounting groove (6), and the lower end of the screw sleeve (5) is provided with an annular flange (16) that extends outward and fits into the limiting groove (15).

7. A limit switch housing according to claim 6, characterized in that: The lower end of the annular flange (16) is provided with a circular groove (17), and an annular magnet (18) is interference-fitted into the circular groove (17). The inner diameter of the annular magnet (18) is smaller than the inner diameter of the threaded sleeve (5).

8. A limit switch housing according to claim 7, characterized in that: The inner surface of the circular groove (17) is provided with a plurality of anti-loosening protrusions (19), which abut against the outer surface of the annular magnet (18).

9. A limit switch housing according to claim 1, characterized in that: The outer shell body (1) is provided with a support protrusion (20) at the lower end of the mounting hole (2), and the support protrusion (20) protrudes from the lower end face of the outer shell body (1).

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