A car bottom weighing device for shallow pits

Abstract

This utility model discloses a car bottom weighing device for shallow pit elevators, comprising: an inclined plane transmission structure connected to the bottom frame of the car; a support frame fixedly installed on the car bottom bracket, with a sensor mounted on the support frame; and a crossbar, laterally guided and installed on the support frame, the crossbar having a guide inclined surface that cooperates with the inclined plane transmission structure, and a magnetic element mounted on the crossbar. When the car is under load, the inclined plane transmission structure is compressed, generating a vertical displacement. This vertical displacement is converted into a lateral displacement of the crossbar through cooperation with the guide inclined surface, thus changing the relative position between the magnetic element and the sensor. This utility model changes the traditional vertical installation of the weighing device to a horizontal installation through the inclined plane transmission structure, greatly reducing the vertical space occupied by the device and allowing it to adapt to the limited space of shallow pit elevators. Simultaneously, the mounting base is connected to the bottom frame of the car with screws, facilitating easy assembly and disassembly and enabling quick installation or maintenance.

Description

Technical Field

[0001] This utility model particularly relates to a weighing device for the bottom of a car in a shallow pit. Background Technology

[0002] In elevator equipment, the weighing device is a key component for monitoring the load on the elevator car. Accurate monitoring of the car load can effectively prevent elevator overloading, thus ensuring the safety of passengers and equipment, and playing a vital role in the healthy operation of the elevator.

[0003] However, traditional weighing devices have some significant limitations. Traditional weighing probes are typically over 80mm high, which poses a significant challenge for most home elevators. Due to the specific nature of their use, home elevators often have strictly limited pit dimensions, making it difficult to accommodate the installation requirements of traditional, relatively tall weighing devices. Therefore, it is often necessary to place the weighing device at the end of a rope.

[0004] However, this installation method also brings new problems: when the elevator travels to the top and bottom floors, the weight difference between the suspension device and the traveling cable can cause deviations in the output data of the weighing device. This deviation may prevent the weighing device from accurately reflecting the actual load on the car, thus making it impossible for the elevator control system to make correct judgments and adjustments. If the elevator operates under conditions of passenger overload or uneven load, it will not only reduce the elevator's service life and increase the risk of equipment failure, but may also cause serious safety accidents, threatening the lives of passengers. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a weighing device for the bottom of a car in a shallow pit.

[0006] A weighing device for the bottom of a car in a shallow pit, comprising:

[0007] The inclined plane transmission structure is rigidly connected to the bottom frame of the car;

[0008] A support frame is fixedly installed on the car bottom bracket, and sensors are installed on the support frame.

[0009] A crossbar is laterally guided and installed on the support frame. The crossbar is provided with a guide slope that cooperates with the inclined transmission structure, and a magnetic element is installed on the crossbar.

[0010] When the car is under load, the inclined plane transmission structure is compressed and generates a vertical displacement. Through cooperation with the guide inclined plane, the vertical displacement is converted into the lateral displacement of the crossbar, thereby changing the relative position between the magnetic element and the sensor.

[0011] Preferably, the inclined plane transmission structure includes:

[0012] Mounting base, connected to the bottom frame of the car;

[0013] The force transmission column is vertically fixed to the lower end of the mounting base, and its axial end is provided with a first wedge-shaped transmission surface;

[0014] The first wedge-shaped transmission surface and the guide slope on the crossbar are arranged in a mirror-symmetric manner to form a sliding fit.

[0015] Preferably, the inclination angles of the first wedge-shaped transmission surface and the guide slope are both 45 degrees.

[0016] Preferably, it further includes a reset mechanism, the reset mechanism comprising:

[0017] A limiting ring is fixedly fitted onto the crossbar;

[0018] A preloaded spring is coaxially sleeved on the crossbar, with its two ends abutting against the limiting ring and the support frame, respectively.

[0019] When the crossbar moves toward the sensor, the preload spring undergoes compression deformation to provide a reset force.

[0020] Preferably, a guide seat is fixedly provided on the support frame, and a guide hole is provided on the guide seat for the crossbar to pass through. When the crossbar moves toward the sensor, the preload spring abuts against the guide seat.

[0021] Preferably, the magnetic element is a magnet.

[0022] Preferably, the mounting base is connected to the bottom frame of the car by screws.

[0023] The beneficial effects of this utility model are:

[0024] This invention utilizes an inclined plane transmission structure to change the weighing device from a traditional vertical installation to a horizontal installation, significantly reducing the vertical space occupied by the device and enabling it to adapt to the limited space of shallow pit elevators. Simultaneously, the mounting base is connected to the bottom frame of the car with screws, facilitating easy assembly and disassembly and allowing for quick installation or maintenance. It adapts to different car bottom structures without requiring complex modifications to the car bottom frame. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the structure of a car bottom weighing device for shallow pits according to this application. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of a car bottom weighing device for shallow pits according to this application. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the structure of a car bottom weighing device for shallow pits according to this application. Figure 3 ;

[0029] Figure 4 This is a schematic diagram of the structure of a car bottom weighing device for shallow pits according to this application. Figure 4 ;

[0030] Figure 5 This is a schematic diagram of the structure of a car bottom weighing device for shallow pits according to this application. Figure 5 . Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0032] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.

[0033] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, soldering, snap-fitting, or embedding to suitably replace it.

[0034] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.

[0035] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.

[0036] A weighing device for the bottom of a car in a shallow pit, comprising:

[0037] Inclined transmission structure 1 is rigidly connected to the bottom frame of the car;

[0038] The support frame 2 is fixedly installed on the car bottom bracket, and the support frame 2 is equipped with a sensor 3.

[0039] A crossbar 4 is laterally guided and installed on the support frame 2. The crossbar 4 is provided with a guide slope 41 that cooperates with the inclined transmission structure 1, and a magnetic element 5 is installed on the crossbar 4.

[0040] When the car is under load, the inclined plane transmission structure 1 is compressed and generates a vertical displacement. Through cooperation with the guide inclined plane 41, the vertical displacement is converted into the lateral displacement of the crossbar 4, thereby changing the relative position between the magnetic element 5 and the sensor 3.

[0041] Furthermore, the inclined plane transmission structure 1 includes:

[0042] Mounting base 11 is connected to the bottom frame of the car;

[0043] The force transmission column 12 is vertically fixed to the lower end of the mounting base 11, and its axial end is provided with a first wedge-shaped transmission surface 13.

[0044] The first wedge-shaped transmission surface 13 and the guide inclined surface 41 on the crossbar 4 are arranged in a mirror symmetrical manner to form a sliding fit.

[0045] Furthermore, the inclination angles of the first wedge-shaped transmission surface 13 and the guide inclined surface 41 are both 45 degrees.

[0046] Furthermore, it also includes a reset mechanism 6, which comprises:

[0047] The limiting ring 61 is fixedly fitted onto the crossbar 4;

[0048] A preloaded spring 62 is coaxially sleeved on the crossbar 4, with its two ends abutting against the limiting ring 61 and the support frame 2, respectively.

[0049] When the crossbar 4 moves toward the sensor 3, the preload spring 62 undergoes compression deformation to provide a reset force.

[0050] Furthermore, a guide seat 7 is fixedly installed on the support frame 2, and a guide hole 71 is provided on the guide seat 7 for the crossbar 4 to pass through. When the crossbar 4 moves toward the sensor 3, the preload spring 62 abuts against the guide seat 7.

[0051] Furthermore, the magnetic element 5 is a magnet.

[0052] Furthermore, the mounting base 11 is connected to the bottom frame of the car by screws.

[0053] The working principle of this utility model is as follows:

[0054] like Figure 1-5 As shown, the present invention provides a car bottom weighing device for shallow pits, which mainly consists of an inclined plane transmission structure 1, a support frame 2, a crossbar 4, and a sensor 3.

[0055] The inclined plane transmission structure 1 is rigidly connected to the bottom frame of the car, and includes a mounting base 11 and a force transmission column 12. The mounting base 11 is firmly connected to the bottom frame of the car by screws. The force transmission column 12 is vertically fixed to the lower end of the mounting base 11, and the axial end of the force transmission column 12 is provided with a first wedge-shaped transmission surface 13. The first wedge-shaped transmission surface 13 and the guide inclined surface 41 on the crossbar 4 are arranged in a mirror symmetrical manner, and a sliding fit is formed between them. As a preferred embodiment, the inclination angle of both is 45 degrees. This design can achieve a relatively ideal displacement conversion effect during force transmission. In this technical solution, either the first wedge-shaped transmission surface 13 or the guide inclined surface 41 can be replaced with a spherical surface to achieve the same function.

[0056] The support frame 2 is fixedly installed on the car bottom bracket, and a sensor 3 is installed on the support frame 2. The crossbar 4 is laterally guided and installed on the support frame 2, and has a guide slope 41 that cooperates with the inclined transmission structure 1 and a magnetic element 5 (a magnet in this embodiment). When the car is under load (i.e., when a passenger enters the car and the shock-absorbing rubber of the car bottom deforms due to the load), the inclined transmission structure 1 is compressed and generates a vertical displacement. Through the cooperation of the first wedge-shaped transmission surface 13 and the guide slope 41, the vertical displacement is converted into a lateral displacement of the crossbar 4, thereby changing the relative position between the magnetic element 5 and the sensor 3. The sensor 3 can sense the load size based on this change in relative position. In Embodiment 1 of this application, sensor 3 can be implemented using a weighing sensor of model EWD-H-XV10. In the traditional installation method, the sensor is installed vertically, and the weight is determined by directly sensing the stroke of the compression and shock absorption device under the weight change of the car. The sensor itself requires a height of at least 120mm (sensor height 82mm + magnet gap 15mm + tail cable exit space 25mm). Taking into account the thickness of the car bottom, the safety distance of the buffer, etc., the pit depth needs to be at least 250mm. With the structure described in the patent, only 45mm of height needs to be reserved, and the pit depth only needs to be 120mm.

[0057] In addition, this device also includes a reset mechanism 6, which consists of a limiting ring 61 and a preload spring 62. The limiting ring 61 is fixedly fitted onto the crossbar 4, and the preload spring 62 is coaxially fitted onto the crossbar 4, with its two ends abutting against the limiting ring 61 and the support frame 2, respectively. When the crossbar 4 moves toward the sensor 3, the preload spring 62 undergoes compression deformation, thereby providing a reset force to ensure that the crossbar 4 can return to its initial position after the load is removed (i.e., when the deformation of the shock-absorbing rubber recovers), ensuring the measurement accuracy of the device. At the same time, a guide seat 7 is fixedly installed on the support frame 2, and the guide seat 7 has a guide hole 71 for the crossbar 4 to pass through. When the crossbar 4 moves toward the sensor 3, the preload spring 62 abuts against the guide seat 7, further enhancing the stability and guiding accuracy of the device.

[0058] This invention, through its inclined plane transmission structure 1, changes the traditional vertical installation of the weighing device to a horizontal installation, greatly reducing the vertical space occupied by the device and enabling it to adapt to the limited space of shallow pit elevators. Simultaneously, the mounting base 11 is connected to the bottom frame of the car with screws, facilitating easy assembly and disassembly and allowing for quick installation or maintenance. It adapts to different car bottom structures without requiring complex modifications to the bottom frame of the car.

Claims

1. A weighing device for the bottom of a car in a shallow pit, characterized in that, include: The inclined plane transmission structure (1) is rigidly connected to the bottom frame of the car; A support frame (2) is fixedly installed on the car bottom bracket, and a sensor (3) is provided on the support frame (2); A crossbar (4) is horizontally guided and installed on the support frame (2). The crossbar (4) is provided with a guide slope (41) that cooperates with the inclined transmission structure (1), and a magnetic element (5) is installed on the crossbar (4). When the car is under load, the inclined transmission structure (1) is compressed and generates a vertical displacement. Through cooperation with the guide inclined surface (41), the vertical displacement is converted into the lateral displacement of the crossbar (4), so that the relative position between the magnetic element (5) and the sensor (3) changes.

2. The weighing device for car bottom in a shallow pit according to claim 1, characterized in that, The inclined plane transmission structure (1) includes: Mounting base (11) is connected to the bottom frame of the car; The force transmission column (12) is vertically fixed to the lower end of the mounting base (11), and its axial end is provided with a first wedge-shaped transmission surface (13); The first wedge-shaped transmission surface (13) and the guide inclined surface (41) on the crossbar (4) are arranged in a mirror symmetrical manner to form a sliding fit.

3. A weighing device for car bottoms in shallow pits according to claim 2, characterized in that, The inclination angles of the first wedge-shaped transmission surface (13) and the guide inclined surface (41) are both 45 degrees.

4. A weighing device for car bottom in a shallow pit according to claim 2, characterized in that, It also includes a reset mechanism (6), which comprises: A limiting ring (61) is fixedly fitted onto the crossbar (4); A preload spring (62) is coaxially sleeved on the crossbar (4), with its two ends abutting against the limiting ring (61) and the support frame (2), respectively. When the crossbar (4) moves toward the sensor (3), the preload spring (62) generates compression deformation to provide a reset force.

5. A weighing device for car bottom in a shallow pit according to claim 4, characterized in that, A guide seat (7) is fixedly installed on the support frame (2). The guide seat (7) has a guide hole (71) for the crossbar (4) to pass through. When the crossbar (4) moves toward the sensor (3), the preload spring (62) abuts against the guide seat (7).

6. A weighing device for car bottom in a shallow pit according to claim 2, characterized in that, The magnetic element (5) is a magnet.

7. A weighing device for car bottom in a shallow pit according to claim 2, characterized in that, The mounting base (11) is connected to the bottom frame of the car by screws.

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