Limit switch assembly of elevator

Abstract

The utility model provides an elevator limit switch assembly, which relates to the technical field of elevator accessories, and comprises a pinch plate, a cavity, a cushion layer, a through hole, a housing, a rotating shaft, a baffle plate, a disc-shaped reed and a cross rod, and further comprises a spring which is arranged in the housing and is always in a compressed state, one end of the spring is connected with the cross rod, and the other end of the spring is connected with the rotating shaft. The other end of the spring is connected with the inner top of the housing, a limiting plate is arranged on the outer surface of the housing, the limit switch assembly further comprises a microswitch, the microswitch is arranged at the end, away from the buckle plate, of the transverse rod, and the limit switch assembly can be installed on the inner wall of an elevator shaft, so that the limit switch assembly is not affected by vibration when an elevator works; and meanwhile, lubricating oil cannot enter the contact, so that the stability and reliability of the limit switch assembly are improved, and meanwhile, as the housing can be rotationally adjusted on one side of the buckle plate, whether the limit switch assembly is inverted up and down or not does not need to be worried about when the limit switch assembly is installed, and the convenience of installation is improved.

Description

Technical Field

[0001] This utility model relates to the field of elevator accessories technology, specifically an elevator limit switch assembly. Background Technology

[0002] Elevator limit switches are safety protection devices used to prevent the elevator car from exceeding its normal operating range at the top and bottom limit positions. They are a key component of the elevator safety circuit. Once triggered, they immediately cut off the power to the elevator host, stopping the elevator and preventing more serious accidents.

[0003] Existing limit switch assemblies are often installed on elevator guide rails. As the elevator operates, it generates vibrations, which are transmitted to the limit switch assemblies. This vibration may cause abnormal jitter of the switch contacts, leading to false triggering or contact failure. At the same time, grease splashing from the guide rail may cover the switch contacts, forming an insulating layer and causing signal transmission failure. Utility Model Content

[0004] The purpose of this invention is to provide an elevator limit switch assembly, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The elevator limit switch assembly includes a buckle plate, a cavity on one side of the buckle plate, an elastic pad on one side of the buckle plate, through holes on both the buckle plate and the pad, a cover on one side of the buckle plate, a rotating shaft rotatably connected to the buckle plate on one side of the cover, a baffle on one end of the rotating shaft, a disc spring sleeved on the rotating shaft, the disc spring located between the buckle plate and the baffle, a crossbar inside the cover, the crossbar rotatably connected to the cover, and a spring disposed inside the cover and always in a compressed state, one end of the spring connected to the crossbar, the other end of the spring connected to the inner top of the cover, a limit plate on the outer surface of the cover, and a micro switch disposed at the end of the crossbar away from the buckle plate.

[0006] Preferably, sleeves are provided on the upper surface of the crossbar and the inner top wall of the cover, and the two ends of the spring are respectively located inside the two sleeves.

[0007] Preferably, the distance between the sleeve and the buckle plate located on the inner top wall of the housing is greater than the distance between the sleeve and the buckle plate on the crossbar.

[0008] Preferably, when the spring is in its maximum compressed state inside the housing, the crossbar rotates at an angle of not less than 60°.

[0009] Preferably, the baffle is made of metal, a stud is provided on one side of the baffle, and a threaded hole that mates with the stud is provided at one end of the rotating shaft.

[0010] The beneficial effects of this utility model are:

[0011] This type of limit switch assembly can be installed on the inner wall of the elevator shaft, so it will not be affected by the vibration during elevator operation. At the same time, lubricating oil will not enter the contacts, thus improving the stability and reliability of the limit switch assembly. In addition, since the cover can be rotated and adjusted on one side of the buckle, there is no need to worry about whether the limit switch assembly is upside down when installing it, thus improving the convenience of installation. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0013] Figure 2 This is a schematic diagram of a micro switch installed on a crossbar.

[0014] Figure 3 This is a schematic diagram of the internal structure of the casing.

[0015] Figure 4 This is a schematic diagram showing the connection between the rotating shaft and the baffle.

[0016] In the diagram: 1. Elevator shaft; 2. Counterweight guide rail; 3. Buckle plate; 4. Pad layer; 5. Cover; 6. Rotating shaft; 7. Baffle; 8. Disc spring; 9. Crossbar; 10. Spring; 11. Limit plate; 12. Micro switch; 13. Sleeve; 14. Stud. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] like Figure 1-4 As shown, an elevator limit switch assembly includes a buckle plate 3, a cavity on one side of the buckle plate 3, an elastic pad 4 on one side of the buckle plate 3, through holes on both the buckle plate 3 and the pad 4, a cover 5 on one side of the buckle plate 3, a rotating shaft 6 rotatably connected to the buckle plate 3 on one side of the cover 5, a baffle 7 at one end of the rotating shaft 6, a disc spring 8 sleeved on the rotating shaft 6, the disc spring 8 being located between the buckle plate 3 and the baffle 7, a crossbar 9 inside the cover 5, the crossbar 9 being rotatably connected to the cover 5, a spring 10 disposed inside the cover 5 and always in a compressed state, one end of the spring 10 being connected to the crossbar 9, the other end of the spring 10 being connected to the inner top of the cover 5, a limit plate 11 on the outer surface of the cover 5, and a micro switch 12 disposed at the end of the crossbar 9 away from the buckle plate 3.

[0019] Each elevator system is equipped with two sets of limit switch assemblies. One set is located on the upper part of the inner wall of elevator shaft 1, and the other set is located on the lower part of the inner wall of elevator shaft 1. Both sets of limit switch assemblies are located on one side of the counterweight guide rail 2. Both sets of limit switch assemblies are triggered by the impact of the counterweight frame. That is, when the elevator car rises or falls beyond the safe range due to an accident, the corresponding counterweight frame will also rise or fall beyond the safe range. When the rise or fall of the counterweight frame exceeds the safe range, it will hit the micro switch 12 in the limit switch assembly. Therefore, the limit switch assembly located at the upper position is used to prevent the car from bottoming out, and the limit switch assembly located at the lower position is used to prevent the car from topping out.

[0020] When installing the limit switch assembly onto the inner wall of elevator shaft 1, first select a suitable installation height, then drill corresponding bolt holes on the inner wall of elevator shaft 1. The bolt holes correspond to the through holes on the buckle plate 3. Then, install the buckle plate 3 and the pad 4 onto the inner wall of elevator shaft 1 using bolts. The pad 4 is a rubber pad or a silicone pad. After the buckle plate 3 is installed, the edges of the pad 4 are compressed, and the central area of ​​the pad 4 extends into the cavity of the buckle plate 3. At the same time, with the cooperation of the disc spring 8, there is sufficient friction between the baffle 7 and the pad 4. When the cover 5 is rotated by the rotating shaft 6, the friction between the baffle 7 and the pad 4 allows the cover 5 to stop at any position, which facilitates the adjustment of the position of the crossbar 9 and the limit plate 11. In the two sets of limit switch assemblies, the crossbar 9 in the lower limit switch assembly is located directly below the limit plate 11, while the crossbar 9 in the other set of limit switch assemblies is located directly above the limit plate 11.

[0021] Under the action of spring 10, the crossbar 9 can support the micro switch 12 to remain stable. When the counterweight frame hits one of the upper or lower micro switches 12, the rotation angle of the crossbar 9 is less than 3°. However, when the lower or upper end of the counterweight frame is deformed, the micro switch 12 cannot avoid the subsequent compression of the counterweight frame by its deformation. At this time, the impact force will be transmitted to the crossbar 9 through the micro switch 12, which will then cause the crossbar 9 to rotate and the spring 10 to be compressed. The rotation of the crossbar 9 can reduce the damage to the micro switch 12.

[0022] Furthermore, sleeves 13 are provided on the upper surface of the crossbar 9 and the inner top wall of the cover 5. The two ends of the spring 10 are located inside the two sleeves 13 respectively. The two sleeves 13 can keep the spring 10 inside the cover 5. The two ends of the spring 10 can be connected to the sleeves 13 by screws or fasteners to prevent the ends of the spring 10 from moving out of the sleeves 13.

[0023] Furthermore, the distance between the sleeve 13 located on the inner top wall of the cover 5 and the buckle plate 3 is greater than the distance between the sleeve 13 on the crossbar 9 and the buckle plate 3, which facilitates better compression of the spring 10. The spring 10 can be an arc-shaped spring 10, which can achieve a better compression effect.

[0024] Furthermore, when the spring 10 is in its maximum compressed state inside the housing 5, the crossbar 9 rotates at an angle of not less than 60°.

[0025] Furthermore, the baffle 7 is made of metal, and a stud 14 is provided on one side of the baffle 7. One end of the rotating shaft 6 is provided with a threaded hole that mates with the stud 14, which facilitates the installation of the disc spring 8.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An elevator limit switch assembly, characterized in that, The device includes a snap-on plate, one side of which has a cavity and an elastic pad. Both the snap-on plate and the pad have through holes. A cover is provided on one side of the snap-on plate, and a rotating shaft rotatably connected to the snap-on plate is provided on one side of the cover. A baffle is provided at one end of the rotating shaft, and a disc-shaped spring is sleeved on the rotating shaft between the snap-on plate and the baffle. A crossbar is provided inside the cover and rotatably connected to the cover. The device also includes a spring that is always compressed and is located inside the cover. One end of the spring is connected to the crossbar, and the other end of the spring is connected to the inner top of the cover. A limit plate is provided on the outer surface of the cover. The device also includes a micro switch located at the end of the crossbar away from the snap-on plate.

2. The elevator limit switch assembly according to claim 1, characterized in that, Sleeves are provided on the upper surface of the crossbar and the inner top wall of the cover, and the two ends of the spring are located inside the two sleeves respectively.

3. The elevator limit switch assembly according to claim 2, characterized in that, The distance between the sleeve and the buckle plate located on the inner top wall of the housing is greater than the distance between the sleeve and the buckle plate on the crossbar.

4. The elevator limit switch assembly according to claim 2, characterized in that, When the spring is in its maximum compressed state inside the housing, the crossbar rotates at an angle of not less than 60°.

5. The elevator limit switch assembly according to any one of claims 1-4, characterized in that, The baffle is made of metal, and a stud is provided on one side of the baffle. One end of the rotating shaft is provided with a threaded hole that mates with the stud.

Images