Heavy-duty height limit switch

Abstract

The utility model discloses a heavy type height limit switch, including cam, transmission shaft torsional spring, handle, micro -switch, adjusting nut, and cam coaxial installation is in transmission shaft rear end, and torsional spring cover handle link axle, and the head portion of micro -switch is installed with adjusting nut on operating lever, a heavy type height limit switch, handle rotation drives cam rotation, and the shape of cam will make the operating lever of micro -switch head portion produce stroke, thereby leading to the break of micro -switch inside normally closed contact, realizes signal switching function, when using, handle one side through the rope traction weight, when the weight is lifted to a certain height, handle angle rotation trigger signal switching, through the installation position adjustment of adjusting nut on micro -switch head portion operating lever, can accurate regulation handle trigger signal switching's rotation angle, handle one side solid structure, when switch inside torsional spring failure, the weight of solid structure can make operating head portion reset, guarantees switch normal operation, plays the role of safety protection.

Description

Technical Field

[0001] This utility model relates to a heavy-duty height limit switch, belonging to the field of limit switch technology. Background Technology

[0002] The height limit switches on the market reset through an internal spring mechanism. When the spring fails and cannot reset, there is no other effective safety mechanism to reset the head, and the internal contacts cannot be guaranteed to disconnect, which poses a safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide a heavy-duty height limit switch to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a heavy-duty height limit switch, comprising a cam, a transmission shaft torsion spring, a handle, a micro switch, and an adjusting nut. The cam is coaxially mounted at the rear end of the transmission shaft, the torsion spring is fitted onto the handle and the shaft, and the adjusting nut is mounted on the operating rod of the micro switch head.

[0005] Preferably, a terminal block is positioned and installed in the middle of the micro switch, and the terminal block is raised and positioned by a Z-shaped bracket to install the terminal screws. An anti-touch cover is positioned and installed on the micro switch.

[0006] Preferably, the operating angle of the handle switch is 0°, 4°, 7.2° and 45°.

[0007] Preferably, the other side of the handle is a solid structure with a certain counterweight.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] When the handle is rotated, it drives the cam to rotate. The shape of the cam causes the operating lever of the micro switch head to travel, thereby causing the normally closed contact inside the micro switch to open, realizing the signal switching function. In use, a pull rope is connected to one side of the handle to pull a heavy object. When the heavy object is lifted to a certain height, the handle rotates at an angle to trigger the signal switching. The rotation angle of the handle triggering the signal switching can be precisely adjusted by adjusting the installation position of the adjusting nut on the operating lever of the micro switch head. The handle has a solid structure on one side. When the torsion spring inside the switch fails, the weight of the solid structure will cause the operating head to reset, ensuring the normal operation of the switch and providing a safety protection function. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the internal structure of the heavy-duty height limit switch of this utility model;

[0011] Figure 2 This is a schematic diagram of the installation structure of the micro switch of this utility model;

[0012] Figure 3 This is a travel diagram of the handle switch of this utility model.

[0013] In the diagram: 1. Cam, 2. Drive shaft, 3. Torsion spring, 4. Handle, 5. Micro switch, 6. Adjusting nut, 7. Wire plate, 8. Wiring screw, 9. Anti-touch cover. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] like Figures 1-3 As shown, a heavy-duty height limit switch includes a cam 1, a drive shaft 2, a torsion spring 3, a handle 4, a micro switch 5, and an adjusting nut 6. The cam 1 is coaxially mounted at the rear end of the drive shaft 2. The torsion spring 3 is fitted onto the handle 4 at the shaft position. The adjusting nut 6 is mounted on the operating rod of the micro switch 5.

[0016] A terminal block 7 is positioned and installed in the middle of the micro switch 5. The terminal block 7 is raised and positioned by a Z-shaped bracket to install the wiring screws 8. An anti-touch cover 9 is also installed on the micro switch 5. The anti-touch cover 9 is installed to prevent the customer from touching the original wiring position when wiring.

[0017] The handle 4 switch has operating angles of 0°, 4°, 7.2° and 45°, with a starting position of 0°, a switching position of 4°, a confirmed off position of 7.2° and a maximum travel angle of 45°.

[0018] The other side of the handle 4 is a solid structure with a certain counterweight. When the internal torsion spring 3 of the switch fails, the weight of the solid structure will reset the operating head, ensuring normal operation of the switch and providing safety protection. The switch can accommodate up to four microswitches simultaneously, allowing customers to connect multiple circuits for a higher level of safety.

[0019] Specific usage: This heavy-duty height limit switch uses a handle that rotates to drive a cam. The shape of the cam causes the operating lever on the microswitch head to travel, thus opening the normally closed contact inside the microswitch and achieving signal switching. In use, a weight is pulled by a rope on one side of the handle. When the weight is raised to a certain height, the handle rotates at an angle, triggering the signal switching. The rotation angle of the handle triggering the signal switching can be precisely adjusted by adjusting the position of the adjusting nut on the operating lever on the microswitch head. The handle has a solid structure on one side; if the internal torsion spring fails, the weight of the solid structure will reset the operating head, ensuring normal operation of the switch and providing safety protection. This device features an optimized structural design with an adjustable switch operating angle and high adjustment precision; multiple microswitches can be installed simultaneously to form a safety circuit; and it has a fail-safe protection device, improving switch safety.

[0020] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.

Claims

1. A heavy-duty height limit switch, characterized in that, Includes a cam (1), a drive shaft (2), a torsion spring (3), a handle (4), a micro switch (5), and an adjusting nut (6). The cam 1 is coaxially mounted at the rear end of the drive shaft (2). The torsion spring 3 is mounted on the handle (4) at the connecting shaft position. The adjusting nut (6) is mounted on the operating rod of the micro switch (5).

2. The heavy-duty height limit switch according to claim 1, characterized in that: A terminal block (7) is positioned and installed in the middle of the micro switch (5). The terminal block (7) is raised and positioned by a Z-shaped bracket and a terminal screw (8) is installed. An anti-touch cover (9) is positioned and installed on the micro switch (5).

3. The heavy-duty height limit switch according to claim 1, characterized in that: The operating angles of the handle (4) are 0°, 4°, 7.2° and 45°.

4. The heavy-duty height limit switch according to claim 1, characterized in that: The other side of the handle (4) is a solid structure with a certain counterweight.

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