An elevator overload detection device

Abstract

The utility model discloses an elevator overload detection device, including car and car frame, and the activity is connected between car and car frame, the top of car is connected with the car roof straight beam clamping plate, and one end of car roof straight beam clamping plate extends to car outside and forms switch board, and the below of switch board is equipped with weighing assembly, the weighing assembly includes the weighing base of fixed connection car frame, and the weighing support is slidably connected on weighing base, and the elastic part is connected between weighing support and weighing base, and the micro -switch that cooperates switch board is connected on weighing support, switch board is used for triggering micro -switch when with car sinking to specified height. The utility model can improve the safety of operating personnel when installing, and improve the use stability of elevator overload detection device.

Description

Technical Field

[0001] This utility model relates to the field of elevators, and in particular to an elevator overload detection device. Background Technology

[0002] Currently, elevator cars are installed in two ways: fixed and movable. In the movable type, the car is placed on the car frame using shock-absorbing pads, and the car and frame are directly connected without bolts. When people enter the elevator, the car slightly sinks relative to the car frame. To enable overload detection, a microswitch is installed at the bottom of the movable car. When the load inside the car reaches a threshold, the microswitch sinks with the car until it contacts the car frame and is triggered, thus performing the detection function.

[0003] However, this structure has several drawbacks. First, because the overload detection device requires installers to stand in the pit and fix the microswitch above their heads to the bottom of the car, the installation process carries a certain risk: the car may accidentally fall and injure the installer. Second, if the car descends too much, there is a possibility that the microswitch may collide directly with the car floor and be damaged, thus reducing the stability of the elevator overload detection device.

[0004] Therefore, existing elevator overload detection devices for movable elevator cars suffer from low safety and poor operational stability. Utility Model Content

[0005] The purpose of this invention is to provide an elevator overload detection device. It improves the safety of installation workers and enhances the stability of the elevator overload detection device in use.

[0006] The technical solution of this utility model is as follows: An elevator overload detection device includes a car and a car frame, which are movably connected. A car top straight beam plate is connected to the top of the car, and one end of the car top straight beam plate extends to the outside of the car and forms a switch plate. A weighing component is provided below the switch plate. The weighing component includes a weighing base fixedly connected to the car frame, a weighing bracket slidably connected to the weighing base, an elastic part connecting the weighing bracket and the weighing base, and a micro switch connected to the weighing bracket to cooperate with the switch plate. The switch plate is used to trigger the micro switch when the car descends to a specified height.

[0007] In the aforementioned elevator overload detection device, the car frame includes a bottom support frame, and the two sides of the bottom support frame are connected to the upper beam of the car frame via straight beams. The bottom of the car is placed on the bottom support frame via shock-absorbing pads.

[0008] In the aforementioned elevator overload detection device, the switch plate and the car top straight beam plate are connected to each other by bolts, and the switch plate is provided with elongated holes for connecting bolts.

[0009] In the aforementioned elevator overload detection device, a groove is formed on one side of the weighing base, the weighing bracket is L-shaped, one side of the weighing bracket is slidably connected to the groove, and the other side of the weighing bracket extends above the weighing base and is connected to a micro switch.

[0010] In the aforementioned elevator overload detection device, a guide rod is connected to the middle of the weighing base, and the upper end of the guide rod extends above the weighing bracket and forms a limiting part; the elastic part is a compression spring, which is sleeved on the outside of the guide rod and its two ends are respectively in contact with the weighing base and the weighing bracket.

[0011] In the aforementioned elevator overload detection device, the middle part of the guide rod is slidably connected to the weighing base, the upper end of the guide rod is fixedly connected to the weighing bracket, and the lower end of the guide rod extends to the outside of the weighing base and is threadedly connected to a limit nut.

[0012] Compared with the prior art, this utility model has the following characteristics:

[0013] (1) Through the structural cooperation of the switch plate and the weighing component, the switch plate located at the top of the car can descend with the car and trigger the micro switch below to realize its overload detection function; by sliding the weighing bracket connected to the micro switch on the weighing base and connecting them with the elastic part, when the car sinks too much, the micro switch can descend with the pressure of the switch plate, which effectively prevents the micro switch from being damaged by excessive pressure of the switch plate and improves its stability; with the above cooperation, the present invention can be installed at the top of the car, thereby effectively avoiding the situation where the operator is injured by falling objects during the installation process and improving its safety.

[0014] (2) Through the structural cooperation of the slide and the guide rod, the weighing base can guide and limit the weighing support, thereby preventing the weighing support from deviating and jamming during the lifting and lowering process; on this basis, by setting the guide rod connection structure, it can also adjust the top height of the guide rod after installation, and use the limiting part to limit the downward pressure position of the switch plate, thereby further preventing the possibility of the micro switch being damaged by excessive pressure on the switch plate;

[0015] Therefore, this utility model can improve the safety of operators during installation and enhance the stability of elevator overload detection devices. Attached Figure Description

[0016] Figure 1 This is an installation diagram of this utility model;

[0017] Figure 2 yes Figure 1 A magnified view from direction A;

[0018] Figure 3 This is a side view of the present invention;

[0019] Figure 4 yes Figure 3 A magnified view from direction B.

[0020] The markings in the attached diagram are as follows: 1-Car, 2-Car frame, 3-Car top straight beam clamp, 4-Switch plate, 5-Weighing base, 6-Weighing bracket, 7-Elastic part, 8-Micro switch, 9-Guide rod, 10-Limit nut, 201-Bottom support frame, 202-Straight beam, 203-Car frame upper beam, 501-Slide groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0022] Example. An elevator overload detection device, configured as follows: Figure 1 As shown, the system includes a car 1 and a car frame 2, which are movably connected. A car top straight beam clamping plate 3 is connected to the top of the car 1. One end of the car top straight beam clamping plate 3 extends to the outside of the car 1 and forms a switch plate 4. A weighing assembly is provided below the switch plate 4. The weighing assembly includes a weighing base 5 connected to the car frame 2. A weighing bracket 6 is slidably connected to the weighing base 5. An elastic part 7 is connected between the weighing bracket 6 and the weighing base 5. A micro switch 8 that cooperates with the switch plate 4 is connected to the weighing bracket 6. The switch plate 4 is used to trigger the micro switch 8 when the car 1 descends to a specified height.

[0023] The car frame 2 includes a bottom support frame 201. The two sides of the bottom support frame 201 are connected to the upper beam 203 of the car frame via straight beams 202. The bottom of the car 1 is placed on the bottom support frame 201 via a shock-absorbing pad. The shock-absorbing pad will be compressed to different degrees as the load weight inside the car 1 changes. The two straight beams 202 are located on the left and right sides of the car 1 respectively and are in contact with the side wall of the car 1.

[0024] The weighing base 5 is bolted to the middle of a straight beam 202 on one side.

[0025] The switch plate 4 and the car top straight beam clamping plate 3 are connected to each other by bolts. The switch plate 4 is provided with elongated holes for connecting bolts. During installation, the operator can adjust the height of the switch plate 4 relative to the car top straight beam clamping plate 3 through the elongated holes.

[0026] A U-shaped groove 501 is formed on one side of the weighing base 5, and the weighing bracket 6 is L-shaped. One side of the weighing bracket 6 is slidably connected to the groove 501, and the other side of the weighing bracket 6 extends above the weighing base 5 and is connected to the micro switch 8.

[0027] The weighing base 5 is connected to a guide rod 9 in the middle. The upper end of the guide rod 9 extends above the weighing bracket 6 and forms a limiting part. The elastic part 7 is a compression spring, which is sleeved on the outside of the guide rod 9 and its two ends are respectively in contact with the weighing base 5 and the weighing bracket 6.

[0028] The guide rod 9 is slidably connected to the weighing base 5 in the middle. The upper end of the guide rod 9 is welded to the weighing bracket 6 after passing through it. The lower end of the guide rod 9 extends to the bottom of the weighing base 5 and is threadedly connected to the limit nut 10. The operator can adjust the height of the guide rod 9 relative to the weighing base 5 by tightening or loosening the limit nut 10.

[0029] The working principle of this utility model is as follows: During installation, the operator first installs the car top straight beam clamp 3 and the weighing component on the top of the car 1 and the upper end of the straight beam 202, respectively. Then, the load of the car 1 is adjusted to change the installation height of the switch plate 4 on the car top straight beam clamp 3 and the top height of the guide rod 9. When the load inside the car 1 reaches the threshold, the switch plate 4 sinks down with the car 1 and contacts the contact of the micro switch 8, thus achieving the overload detection function. When the load inside the car 1 exceeds the threshold, the car 1 will cause the switch plate 4 to continue sinking, applying a downward squeezing force to the micro switch 8. Under this squeezing force, the micro switch 8 causes the weighing bracket 6 to slide downward against the elastic force of the elastic part 7, ensuring stable triggering of the micro switch 8 while preventing damage from pressure. When the car 1 descends to its limit position, the bottom of the switch plate 4 contacts the limiting part of the guide rod 9, and the limiting part rigidly limits the switch plate 4 to prevent the switch plate 4 from continuing to press down when the elastic part 7 contracts to a fully compressed state, which would cause the micro switch 8 to be damaged by pressure, thus ensuring the stability of the micro switch 8 in use.

Claims

1. An elevator overload detection device, comprising a car (1) and a car frame (2), wherein the car (1) and the car frame (2) are connected in a movable manner, characterized in that: The top of the car (1) is connected to a car top straight beam clamp (3), one end of which extends to the outside of the car (1) and forms a switch plate (4). A weighing component is provided below the switch plate (4). The weighing component includes a weighing base (5) fixedly connected to the car frame (2), a weighing bracket (6) slidably connected to the weighing base (5), an elastic part (7) connected between the weighing bracket (6) and the weighing base (5), and a micro switch (8) connected to the weighing bracket (6) to cooperate with the switch plate (4). The switch plate (4) is used to trigger the micro switch (8) when the car (1) sinks to a specified height.

2. The elevator overload detection device according to claim 1, characterized in that: The car frame (2) includes a bottom support frame (201), and the two sides of the bottom support frame (201) are connected to the upper beam (203) of the car frame via straight beams (202). The bottom of the car (1) is placed on the bottom support frame (201) via shock-absorbing pads.

3. The elevator overload detection device according to claim 1, characterized in that: The switch plate (4) and the car top straight beam plate (3) are connected to each other by bolts, and the switch plate (4) is provided with elongated holes for connecting bolts.

4. The elevator overload detection device according to claim 1, characterized in that: A groove (501) is formed on one side of the weighing base (5), the weighing bracket (6) is L-shaped, one side of the weighing bracket (6) is slidably connected to the groove (501), and the other side of the weighing bracket (6) extends above the weighing base (5) and is connected to a micro switch (8).

5. The elevator overload detection device according to claim 4, characterized in that: The weighing base (5) is connected to a guide rod (9) in the middle. The upper end of the guide rod (9) extends to the weighing bracket (6) and forms a limiting part. The elastic part (7) is a compression spring. The compression spring is sleeved on the outside of the guide rod (9) and its two ends are respectively in contact with the weighing base (5) and the weighing bracket (6).

6. The elevator overload detection device according to claim 5, characterized in that: The middle part of the guide rod (9) is slidably connected to the weighing base (5), the upper end of the guide rod (9) is fixedly connected to the weighing bracket (6), and the lower end of the guide rod (9) extends to the outside of the weighing base (5) and is threadedly connected to the limit nut (10).

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