Elevator weighing device

Abstract

The utility model belongs to the field of industrial lift provides a lift weighing device, including lower frame, overload limiting device, chassis, bearing frame, buffer pad, the lower frame is fixed on bearing frame through bolt, the chassis is connected with buffer pad through bolt, the buffer pad is fixed on bearing frame through bolt, overload limiting device is fixed on the lower frame through bolt, load presses on the chassis, and the weight is passed to bearing frame through buffer pad, and overload limiting device passes through the position change of accepting chassis, amplifies the change amount, converts into the action of trigger limit switch, and outputs the signal, the chassis is not connected with the lower frame, but the relative position gap is small, plays the role of limiting the vertical motion of chassis. The utility model lift weighing device simple structure, compact cooperation, easy to install, reasonable in design, directly to the load weighing in lift, is more accurate and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of industrial lifting platforms, specifically a lifting platform weighing device. Background Technology

[0002] Industrial lifts are widely used in construction, bridge towers, chimneys, etc., providing convenience for personnel maintenance and goods transportation. Typically, industrial lifts use a sensor pin connected between the drive system and the cage to measure the load inside the cage. This method measures the weight of the cage as well, which can lead to inaccurate weighing. Furthermore, the sensor pins are generally subjected to significant forces and are tightly fitted, making disassembly and repair difficult after damage. In some explosion-proof environments, sensor pins that meet explosion-proof requirements are also unavailable. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned background technology and provide a lifting platform weighing device with simple structure, compact fit, convenient installation and reasonable design, which can directly weigh the load inside the lifting platform, making it more accurate and reliable.

[0004] The purpose of this utility model is achieved through the following technical measures: a weighing device for a lifting platform, comprising a lower frame (i.e., the lower part of the lifting platform cage structure), an overload limit device, a base frame, a support frame (i.e., the lifting platform support frame), and a buffer pad. The lower frame is fixed to the support frame with bolts, the base frame is connected to the buffer pad with bolts, the buffer pad is fixed to the support frame with bolts, and the overload limit device is fixed to the lower frame with bolts. The load is pressed onto the base frame, and the weight is transferred to the support frame through the buffer pad. The overload limit device receives changes in the position of the base frame, amplifies the changes, converts them into actions that trigger a limit switch, and outputs a signal. The base frame and the lower frame are not connected, but their relative positional gap is small, which serves to limit the vertical movement of the base frame.

[0005] In the above technical solution, the overload limit device includes a protective cover, a limit switch, a rotating arm, a torsion spring, a guide wheel, and a base. The guide wheel is in close contact with the base frame. When the base frame is under load, it moves downward. The guide wheel drives the short arm of the rotating arm to rotate downward, while the long arm of the rotating arm triggers the limit switch, which outputs a signal. The torsion spring is fixed to the rotating arm and the base with bolts, ensuring that the rotating arm returns to its original position after the load is removed. The protective cover is fixed to the lower frame with bolts. All other components of the overload limit device are fixed to the protective cover.

[0006] In the above technical solution, the base has a limit rod to limit the rotation direction of the rotating arm.

[0007] Compared with the prior art, the weighing device for elevators of this invention has the following characteristics: 1. Direct load transfer: The load is directly transferred to the load-bearing frame through the base frame and buffer pad. The overload limit device directly accepts the position change of the base frame without any conversion.

[0008] 2. Quick-assembly and disassembly structure: The overload limit device is connected to the lower frame as a whole, and only accepts changes in the position of the base frame. It does not bear any load, which facilitates quick installation and disassembly.

[0009] 3. Deformation amplification design: The rotating arm in the overload limit device can amplify the slight positional changes of the base frame, effectively improving the recognition accuracy.

[0010] 4. Standardized design: The limit switch in the overload limit device adopts a conventional limit switch, which improves the versatility of components and the convenience of maintenance.

[0011] Meanwhile, this utility model has the following beneficial effects: 1. Direct weighing: The load is directly transferred to the support frame through the base frame and buffer pad, making the weighing of the load inside the elevator more accurate and reliable.

[0012] 2. Easy to install and disassemble: The connection between the overload limit device and the lower frame greatly simplifies the installation and disassembly process and improves maintenance efficiency.

[0013] 3. High versatility and interchangeability: The use of conventional limit switches reduces the types of spare parts and inventory costs, and improves the flexibility of installation and maintenance.

[0014] 4. Reliable and durable structure: The overall structure is reasonably designed, and the overload limit device does not bear the load, ensuring the stability and durability of the structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the lifting weighing device of this utility model.

[0016] Figure 2 This is a schematic diagram of the present invention after the base frame has been removed.

[0017] Figure 3 for Figure 2 DD cross-sectional view.

[0018] Figure 4 This is a schematic diagram of the lower frame of this utility model.

[0019] Figure 5 This is a schematic diagram of the base frame of this utility model.

[0020] Figure 6 This is a schematic diagram of the buffer pad in this utility model.

[0021] Figure 7 This is a schematic diagram of the overload limiting device in this utility model.

[0022] Figure 8 This is a front view of the overload limit device.

[0023] The components are: 1. lower frame, 2. overload limit device, 3. base frame, 4. support frame, 5. buffer pad, 6. protective cover, 7. limit switch, 8. rotating arm, 9. torsion spring, 10. guide wheel, 11. seat, 12. limit rod. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figures 1 to 6 As shown, this embodiment provides a weighing device for a lifting platform, mainly including a lower frame 1, an overload limit device 2, a base frame 3, a support frame 4, and a buffer pad 5. The load is pressed onto the base frame 3, and the weight is transferred to the support frame 4 through the buffer pad 5. The base frame 3 and the buffer pad 5 are fixed together with bolts, and the buffer pad 5 and the support frame 4 are also fixed together with bolts. The lower frame 1 and the support frame 4 are directly fixed together with bolts. The lower frame 1 and the base frame 3 are not actually connected, but their relative positional gap is very small, which serves to limit the vertical movement of the base frame 3. The overload limit device 2 is fixed to the lower frame 1 with bolts.

[0028] like Figure 7 and Figure 8As shown, the overload limit device 2 mainly includes a protective cover 6, a limit switch 7, a rotating arm 8, a torsion spring 9, a guide wheel 10, and a base 11. The guide wheel 10 is in close contact with the base frame 3. When the base frame 3 is under load, it moves downwards. The guide wheel 10 drives the rotating arm 8 to rotate downwards. The longer arm of the rotating arm 8 is longer than the shorter arm, which can amplify the small displacement of the shorter arm and trigger the limit switch 7, which outputs a signal. The torsion spring 9 is fixed to the rotating arm 8 and the base 11 with bolts, which can ensure that the rotating arm 8 returns to its original position after the load is removed. There is a limit rod 12 on the base 11, which can limit the rotation direction of the rotating arm 8. The protective cover 6 is fixed to the lower frame 1 with bolts. All other parts are fixed to the protective cover 6, making the overall installation convenient.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A weighing device for a lift, characterized in that: The system includes a lower frame, an overload limit device, a base frame, a support frame, and a buffer pad. The lower frame is bolted to the support frame, the base frame is bolted to the buffer pad, and the buffer pad is bolted to the support frame. The overload limit device is bolted to the lower frame. The load is applied to the base frame, and the weight is transferred to the support frame through the buffer pad. The overload limit device receives changes in the position of the base frame, amplifies the changes, converts them into actions that trigger the limit switch, and outputs a signal. The base frame and the lower frame are not connected, but their relative position gap is small, which helps to limit the vertical movement of the base frame.

2. The elevator weighing device according to claim 1, characterized in that: The overload limit device includes a protective cover, a limit switch, a rotating arm, a torsion spring, a guide wheel, and a base. The guide wheel is in close contact with the base frame. When the base frame is under load, it moves downward. The guide wheel drives the short arm of the rotating arm to rotate downward, while the long arm of the rotating arm triggers the limit switch, which outputs a signal. The torsion spring is fixed to the rotating arm and the base with bolts, ensuring that the rotating arm returns to its original position after the load is removed. The protective cover is fixed to the lower frame with bolts. All other components of the overload limit device are fixed to the protective cover.

3. The elevator weighing device according to claim 1, characterized in that: The base has a limit rod to restrict the rotation direction of the swing arm.

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