Fixed car lifting jack with novel weighing module

Abstract

The invention discloses a fixed car lifting jack with a novel weighing module. The fixed car lifting jack comprises a track bridge, a beam type weighing module, a lifting module, a bogie lifting module, a car body lifting module, a maintenance platform and a supporting steel structure. The track bridge is arranged on the supporting steel structure; the beam type weighing modules are arranged on the two sides of the track bridge, and each beam type weighing module corresponds to one wheel of a train bogie in a one-to-one mode. The lifting modules are connected to the beam type weighing modules in a one-to-one correspondence mode, and the beam type weighing modules are driven to ascend or descend through the lifting modules. The bogie lifting module is arranged on the supporting steel structure; the vehicle body lifting module is arranged on the supporting steel structure and is close to the bogie lifting module; when weighing is carried out, the lifting module acts to jack the beam type weighing module, so that when a train runs to the beam type weighing module along the rail bridge, wheels of the train make direct contact with the beam type weighing module to complete weighing; when weighing is not needed, after the lifting module acts to lower the beam type weighing module, the train wheels do not make contact with the beam type weighing module.

Description

Technical Field

[0001] The present invention relates to a fixed vehicle lifting machine, in particular to a fixed vehicle lifting machine with a novel weighing module. Background Art

[0002] Fixed-type vehicle hoists are essential equipment for urban rail transit operation, maintenance, and repair depots, serving as essential equipment in temporary, scheduled, and repair depots. They are primarily used for raising and lowering vehicles. Several groups of these hoists operate in a synchronized manner, capable of simultaneously lifting single or multiple vehicle sections for bogie replacement and underbody equipment removal and assembly.

[0003] Vehicle weighing equipment is an essential testing equipment for large-scale overhaul operations in subway vehicle depots. It can measure wheel weight, axle weight, vehicle weight, etc.

[0004] Currently, there are fixed vehicle-mounted cranes that can perform both the racking and weighing operations on the same device. However, they have problems such as complex structure, high investment cost, difficulty in installation, difficulty in calibration, poor stability of the weighing platform, and low weighing accuracy. The specific defects are as follows:

[0005] 1. Existing fixed vehicle hoists and weighing test benches are mostly two separate devices. Each single-section vehicle weighing test bench contains four sets of weighing platforms, and each set of weighing platforms is equipped with four column-type weighing sensors. The equipment structure is complex, the procurement cost is high, and it occupies a large space. At the same time, the weighing unit of the existing fixed vehicle hoist with vehicle weighing function has poor ability to withstand lateral forces. Long-term exposure to lateral impact forces from the wheels will cause the movable parts of the structure to deflect or deform, affecting the weighing accuracy.

[0006] 2. The sensors used in existing fixed vehicle lifting machines with vehicle weighing function are mostly column-type weighing sensors, which require high installation accuracy. At the same time, the existing fixed vehicle lifting and maintenance equipment with vehicle weighing function generally requires 32 column-type weighing sensors for weighing a single vehicle, which requires a large number of sensors.

[0007] 3. The column-type weighing sensors of existing fixed vehicle cranes with vehicle weighing functions are mostly spherical end heads, which are in point contact with the installation slots and cannot withstand large lateral forces. Generally, anti-overturning structures and movable gaps need to be designed in multiple locations. At the same time, due to the size and installation method of the column-type sensors, the weighing unit structure size of existing fixed vehicle cranes with vehicle weighing functions is large, which squeezes the maintenance work space of personnel in the foundation pit.

[0008] 4. The existing fixed vehicle lifting machine with vehicle weighing function needs to be equipped with a load-bearing beam. Its special structure makes it difficult to calibrate the weighing unit. At the same time, the weighing platform of the existing fixed vehicle lifting machine with vehicle weighing function needs to be able to move freely to a certain extent to ensure weighing accuracy, which inevitably causes jumping when the train passes, affecting the life of the vehicle and equipment.

[0009] Therefore, it is urgent to develop a fixed vehicle lifting machine with a novel weighing module that overcomes the above-mentioned defects. Summary of the Invention

[0010] In view of the above problems, the present invention provides a fixed vehicle lifting machine with a novel weighing module, which includes:

[0011] Supporting steel structure;

[0012] a track bridge, installed on the supporting steel structure;

[0013] A plurality of beam-type weighing modules are installed on both sides of the track bridge, and each beam-type weighing module corresponds to a wheel of the train bogie;

[0014] A plurality of lifting modules are connected to the plurality of beam-type weighing modules in a one-to-one correspondence, and the beam-type weighing modules are driven to rise or fall by the lifting modules;

[0015] Among them, when performing weighing operations, the lifting module is activated to lift the beam-type weighing module, so that when the train travels along the track bridge to the beam-type weighing module, the train wheels are in direct contact with the beam-type weighing module to complete weighing; when weighing is not required, the lifting module is activated to lower the beam-type weighing module, and the train wheels are not in contact with the beam-type weighing module.

[0016] The above-mentioned fixed vehicle lifting machine further includes a bogie lifting module installed on the supporting steel structure, and the fixed vehicle lifting machine is raised or lowered by the bogie lifting module.

[0017] The above-mentioned fixed vehicle lifting machine further includes a vehicle body lifting module, which is installed on the supporting steel structure and close to the bogie lifting module, and the vehicle body is raised or lowered by the vehicle body lifting module.

[0018] The above-mentioned fixed vehicle lifting machine, wherein each of the beam-type weighing modules includes:

[0019] Install the base plate;

[0020] A sensor is mounted on the mounting base;

[0021] a weighing plate, mounted on the sensor;

[0022] Two guide blocks are mounted on the sensor and are respectively located at both ends of the weighing plate;

[0023] Two guide shafts, one end of which is connected to the mounting base;

[0024] Two linear bearings are installed on the support beam of the track bridge, and the other ends of the two guide shafts are respectively inserted into the two linear bearings in a one-to-one correspondence.

[0025] The above-mentioned fixed vehicle lifting machine, wherein each of the lifting modules includes a synchronous hydraulic cylinder, which is installed on the mounting base plate. When performing weighing operations, the synchronous hydraulic cylinder is actuated to lift the beam-type weighing module. When the train travels along the track bridge to the beam-type weighing module, the wheel rim of the train contacts the guide block and gradually rises, so that the tread of the train wheel leaves the auxiliary rail of the track bridge, and then the wheel rim of the train directly contacts the weighing plate to achieve weighing.

[0026] The above-mentioned fixed vehicle lifting machine further includes a hydraulic pump, which synchronously drives multiple synchronous hydraulic cylinders.

[0027] In the above-mentioned fixed vehicle lifting machine, the weighing plate is connected to the sensor via a pin shaft.

[0028] In the above-mentioned fixed vehicle lifting machine, the sensor is a double shear beam sensor.

[0029] The above-mentioned fixed vehicle lifting machine, wherein the track bridge also includes a wheel position detection module, which is installed in the track bridge, and after the beam-type weighing module is lowered, the wheel position detection is performed through the wheel position detection module.

[0030] The above-mentioned fixed vehicle lifting machine, wherein the wheel position detection module includes: a photoelectric sensor, a reflective plate and a photoelectric sensor mounting plate, the photoelectric sensor mounting plate is installed on the track bridge, the photoelectric sensor is installed on the photoelectric sensor mounting plate, the reflective plate is installed on the track bridge and arranged opposite to the photoelectric sensor, after lowering the beam-type weighing module, the photoelectric sensor emits an infrared signal to illuminate the reflective plate, the infrared light is reflected and then received by the photoelectric sensor, when the train is parked in the correct position, the train wheels block the infrared light, the signal is blocked, and the wheel position detection is realized.

[0031] In summary, the present invention has the following advantages over the prior art:

[0032] The fixed vehicle lifting machine of the present invention is equipped with a beam-type weighing module at the corresponding position of the track bridge, which greatly improves the weighing accuracy and reduces the difficulty of installation and manufacturing costs. At the same time, from the perspective of the overall layout of the subway vehicle depot, the weighing platform and the fixed vehicle lifting machine are integrated into one, which not only reduces the cost of purchasing equipment separately, but also saves the space resources of the weighing platform. At the same time, it also organically combines the vehicle lifting and vehicle weighing processes, saves the time of vehicle scheduling, and greatly improves the efficiency of vehicle maintenance. The present invention solves the shortcomings of existing fixed vehicle lifting machines with whole vehicle weighing functions, such as complex structure, high investment cost, great installation difficulty, difficult calibration, poor weighing platform stability, and low weighing accuracy.

[0033] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a structural schematic diagram of the fixed vehicle lifting machine of the present invention;

[0036] Figure 2 This is a schematic diagram of the installation position of the rail bridge and beam-type weighing module of the present invention;

[0037] Figure 3 This is a schematic diagram of the installation position of the beam type weighing module of the present invention in the track bridge;

[0038] Figure 4 This is a structural diagram of the beam-type weighing module of the present invention;

[0039] Figure 5 This is a schematic diagram of the installation position of the synchronous hydraulic cylinder of the present invention;

[0040] Figure 6 This is a schematic diagram of the photoelectric wheel in place structure of the present invention;

[0041] Figure 7 Schematic diagram of single parking space weighing.

[0042] Among them: 1—track bridge; 1.1—photoelectric sensor; 1.2—reflection plate; 1.3—photoelectric sensor mounting plate; 1.4—dovetail guide rail; 2—beam weighing module; 2.1—mounting base plate; 2.2—double shear beam sensor; 2.3—weighing plate; 2.4—guide block; 2.5—guide shaft; 2.6—linear bearing; 3—lifting module; 4—bogie lifting module; 5—car body lifting module; 6—maintenance platform; 7—supporting steel structure; 8—wheel. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0044] The exemplary embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention. In addition, elements / components with the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0045] The directional terms used herein, such as up, down, left, right, front, or back, are only used to refer to the directions in the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0046] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0047] As used herein, "and / or" includes any and all combinations of the items mentioned.

[0048] Regarding "plurality" in this document, "plurality" includes "two" and "more than two"; regarding "plurality groups" in this document, "plurality groups" includes "two groups" and "more than two groups".

[0049] As used herein, the terms "substantially" and "approximately" are used to modify any quantity or error that may vary slightly, but such variation or error does not alter the essence of the quantity. Generally speaking, the range of such variation or error modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art will appreciate that the aforementioned values ​​may be adjusted based on actual needs and are not intended to be limiting.

[0050] Certain terms used to describe the present application are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art regarding the description of the present application.

[0051] Please refer to Figure 1-Figure 2 , Figure 1 It is a structural schematic diagram of the fixed vehicle lifting machine of the present invention; Figure 2 This is a schematic diagram of the installation position of the rail bridge and beam weighing module of the present invention. Figure 1-Figure 2 As shown, a fixed vehicle lifting machine with a new type of weighing module of the present invention comprises: a track bridge 1, a plurality of beam-type weighing modules 2, a plurality of lifting modules 3, a bogie lifting module 4, a car body lifting module 5, a maintenance platform 6 and a supporting steel structure 7; the track bridge 1 is installed on the supporting steel structure 7; the beam-type weighing modules 2 are installed on both sides of the track bridge 1 and each of the beam-type weighing modules 1 corresponds to a wheel 8 of the train bogie; the lifting modules 3 are connected to the plurality of beam-type weighing modules 2 in a one-to-one correspondence, and the beam-type weighing modules 2 are driven to rise or fall by the lifting modules 3; the bogie lifting module 4 is installed on the supporting steel structure 7, and the fixed vehicle lifting machine is raised or lowered by the bogie lifting module 7, so as to realize The installation and adjustment of the fixed car lifting machine only requires lifting the bogie lifting module 4 of the fixed car lifting machine, and there is no need to dismantle other structures of the fixed car lifting machine; the car body lifting module 5 is installed on the supporting steel structure 7 and is close to the bogie lifting module 4, and the car body is raised or lowered by the car body lifting module 5 to realize vehicle maintenance; the maintenance platform 6 is installed on the supporting steel structure 7; wherein, when weighing operation is performed, the lifting module is actuated to lift the beam type weighing module, so that when the train travels along the track bridge to the beam type weighing module, the train wheels are in direct contact with the beam type weighing module to complete the weighing; when weighing is not required, the lifting module is actuated to lower the beam type weighing module, and the train wheels do not contact the beam type weighing module.

[0052] Specifically, two fixed car-lifting machines are used for each car section, and the fixed car-lifting machines are configured according to the number of vehicle formations of the user. The track bridge 1 is the auxiliary track structure of the fixed car-lifting machine. Each fixed car-lifting machine with a new type of weighing module has four beam-type weighing modules 2 and one set of lifting modules 3. The four beam-type weighing modules 2 are located on both sides of the track bridge 1, corresponding to the four wheels 8 of the train bogie. The lifting module 3 can be driven manually or electrically to drive the beam-type weighing module 2 up and down, realizing the switching between the ordinary car-lifting mode and the weighing mode of the fixed car-lifting machine. In the ordinary car-lifting mode, the beam-type weighing module 2 is lowered, and the train can pass smoothly on the auxiliary track of the fixed car-lifting machine; in the weighing mode, the beam-type weighing module 2 is raised, the train is parked in the weighing position, and the wheel 8 rim is pressed onto the beam-type weighing module 2 to realize the weighing function, wherein the weighing point corresponding to a single car position of a train section is as follows: Figure 7 shown.

[0053] The present invention performs direct contact weighing by arranging a beam-type weighing module 2 on the track bridge 1, which has high measurement accuracy. The weighing module is in direct contact with the vehicle without any other beam-plate structure between the two, thereby reducing the excess force generated by the contact between the beam-plate structure and other components, ensuring that the weighing module is only subjected to wheel pressure, and can measure the vehicle weight more accurately.

[0054] Please refer to Figure 3-Figure 5 , Figure 3 This is a schematic diagram of the installation position of the beam type weighing module of the present invention in the track bridge; Figure 4 This is a structural diagram of the beam-type weighing module of the present invention; Figure 5 This is a schematic diagram of the installation position of the synchronous hydraulic cylinder of the present invention. Figure 3-Figure 5 As shown, each beam weighing module 2 includes: a mounting base 2.1, a sensor 2.2, a weighing plate 2.3, two guide blocks 2.4, two guide shafts 2.5, and two linear bearings 2.6. The mounting base 2.1 serves as the mounting base, and the sensor 2.2 is mounted above the mounting base 2.1. A gasket (not shown) is provided between the dual sensors 2.2 and the mounting base 2.1 for leveling. At the same time, a portion of the mounting base 2.1 contacts the mounting surface of the sensor 2.2. The weighing plate 2.3 and the guide block 2.4 are installed on the sensor 2.2, and the mounting base plate 2.1 and the guide block 2.4 are fastened with bolts, and the double shear beam sensor 2.2 is clamped at the same time; the guide blocks 2.4 are respectively located at both ends of the weighing plate 2.3; the weighing plate 2.3 is installed on the sensor 2.2 through a locating pin, and the guide shaft 2.5 is installed in the mounting hole of the mounting base plate 2.1 through bolts, and passes through the linear bearing 2.6 to play a guiding role; the linear bearing 2.6 is installed on the mounting hole of the support beam of the track bridge 1.

[0055] It should be noted that the weighing plate 2.3 and the sensor 2.2 are connected by a pin, which is a fixed connection and does not require an anti-overturning structure. The weighing plate 2.3 will not roll over.

[0056] Among them, in this embodiment, a dovetail guide rail 1.4 is also provided in the track bridge, and the mounting base plate 2.1 is installed on the corresponding dovetail guide rail 1.4 of the track bridge. The dovetail guide rail 1.4 and the mounting base plate 2.1 are installed in coordination to play a guiding and anti-overturning role. After the beam-type weighing module 2 is installed, it can move up and down along the guide shaft 2.5 and the dovetail guide rail 1.4. It is driven by the lifting module 3. When weighing operations are required, the beam-type weighing module 2 is raised, and when it is not needed, the beam-type weighing module 2 is lowered.

[0057] In this embodiment, each lifting module 3 is a synchronous hydraulic cylinder installed on the mounting base 2.1. When weighing is required, the synchronous hydraulic cylinder 3 is activated to lift the beam-type weighing module 2. When the train travels along the track bridge 1 and reaches the beam-type weighing module 2, the train wheel flange contacts the guide block 2.4 and gradually rises. The train wheel tread leaves the auxiliary rail of the track bridge 1, and the wheel flange then bears the weight and contacts the weighing plate 2.3, realizing the weighing function. When the weighing function is no longer required, the synchronous hydraulic cylinder 3 is depressurized, and after lowering the beam-type weighing module 2, the weighing plate 2.3 is not high enough to contact the train wheel flange, allowing the train to pass smoothly on the auxiliary rail of the track bridge 1 without any bouncing.

[0058] The present invention realizes switching between weighing mode and normal mode by lifting the beam-type weighing module through synchronous hydraulic cylinder. The weighing function can be used normally in weighing mode. In normal mode, the train can pass through the vehicle lifting machine area normally without being affected by the weighing module and without causing adverse phenomena such as jumping.

[0059] In this embodiment, it is preferred that the sensor 2.2 is a double shear beam sensor, and each fixed vehicle lifting machine includes four of the double shear beam sensors 2.2. Only eight double shear beam sensors 2.2 are required for weighing a single vehicle.

[0060] The beam weighing module 2 of the present invention has a simple structure. On the basis of the existing fixed vehicle lifting machine structure, only the track bridge 1 structure needs to be modified to realize the weighing function. No additional mechanical structure is required, and the maintenance work space in the foundation pit will not be squeezed.

[0061] The stationary vehicle lift of the present invention further includes a hydraulic pump (not shown) that synchronously drives multiple synchronized hydraulic cylinders. Specifically, each stationary vehicle lift employs four synchronized hydraulic cylinders to synchronously drive the beam weighing module 2. The four synchronized hydraulic cylinders are driven by a single manual or electric hydraulic pump, resulting in high synchronization accuracy and reliability. Each stationary vehicle lift only requires a single operation to switch between weighing modes, making it convenient to use.

[0062] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the photoelectric wheel in place structure of the present invention. Figure 6As shown, the track bridge 1 also includes a wheel position detection module, which is installed in the track bridge 1. After the beam-type weighing module 2 is lowered, the wheel position detection module is used to perform wheel position detection. The wheel position detection module includes: a photoelectric sensor 1.1, a reflective plate 1.2 and a photoelectric sensor mounting plate 1.3. The photoelectric sensor mounting plate 1.3 is installed on the track bridge 1. The photoelectric sensor 1.1 is installed on the photoelectric sensor mounting plate 1.3. The reflective plate 1.2 is installed on the track bridge 1 and is arranged opposite to the photoelectric sensor 1.1. After the beam-type weighing module 2 is lowered, the photoelectric sensor 1.1 emits an infrared signal to illuminate the reflective plate 1.2. The infrared light is reflected and then received by the photoelectric sensor 1.1. When the train is parked in the correct position, the train wheels block the infrared light and the signal is blocked, thereby realizing wheel position detection.

[0063] It should be noted that when the weighing function is used, the beam-type weighing module 2 is raised, the photoelectric signal does not work, and the weight signal detected by the double shear beam sensor is used to realize the wheel position detection function, that is, the weighing parameters of the double shear beam sensor are read as the basis for wheel position detection.

[0064] In summary, the present invention can complete vehicle weighing and vehicle maintenance operations at the same workstation and with the same equipment, reducing equipment costs and improving work efficiency. Specific beneficial effects are as follows:

[0065] 1. The weighing plate and the double shear beam sensor are fixedly connected by a pin and directly contact the train wheels, which is a direct measurement.

[0066] 2. There are guide shafts and dovetail guide rails between the beam weighing module and the track bridge, so the lateral force generated when the vehicle is in place will not affect the weighing accuracy.

[0067] 3. Each fixed vehicle lifting machine includes 4 double shear beam sensors. Only 8 double shear beam sensors are needed for weighing a single vehicle, which is cost-effective.

[0068] 4. The beam weighing module is located on the track bridge and has a simple structure. On the original fixed vehicle crane structure, only the track bridge structure needs to be modified to realize the weighing function.

[0069] 5. After adding the beam weighing module, use the photoelectric sensor to detect the wheel in place. When using the weighing function, read the weighing parameters of the double shear beam sensor as the wheel in place detection. When not using the weighing function, read the photoelectric signal of the photoelectric sensor for wheel in place detection.

[0070] 6. Installation and leveling are easy to operate. You only need to raise the bogie lifting unit of the fixed car lifting machine, and there is no need to dismantle other structures of the fixed car lifting machine.

[0071] 7. The beam-type weighing module can be raised and lowered by a synchronous hydraulic cylinder to switch between weighing mode and normal mode. In weighing mode, the weighing function can be used normally. In normal mode, the train can pass through the vehicle lifting machine area normally without being affected by the weighing module and without causing any adverse phenomena such as jumping.

[0072] 8. The four synchronous hydraulic cylinders of each fixed vehicle lifting machine are driven manually or electrically, with high synchronization accuracy and convenient operation.

[0073] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixed vehicle lifting machine with a new weighing module, characterized in that: include: Supporting steel structure; a track bridge, installed on the supporting steel structure; A plurality of beam-type weighing modules are installed on both sides of the track bridge, and each beam-type weighing module corresponds to a wheel of the train bogie; A plurality of lifting modules are connected to the plurality of beam-type weighing modules in a one-to-one correspondence, and the beam-type weighing modules are driven to rise or fall by the lifting modules; Among them, when performing weighing operations, the lifting module is activated to lift the beam-type weighing module, so that when the train travels along the track bridge to the beam-type weighing module, the train wheels are in direct contact with the beam-type weighing module to complete weighing; when weighing is not required, the lifting module is activated to lower the beam-type weighing module, and the train wheels are not in contact with the beam-type weighing module.

2. The fixed vehicle lifting machine according to claim 1, characterized in that: It also includes a bogie lifting module, which is installed on the supporting steel structure, and the fixed vehicle lifting machine is raised or lowered by the bogie lifting module.

3. The fixed vehicle lifting machine according to claim 2, characterized in that: It also includes a car body lifting module, which is installed on the supporting steel structure and close to the bogie lifting module, and the car body is raised or lowered by the car body lifting module.

4. The fixed vehicle lifting machine according to claim 1, wherein: Each of the beam weighing modules comprises: Install the base plate; A sensor is mounted on the mounting base; a weighing plate, mounted on the sensor; Two guide blocks are mounted on the sensor and are respectively located at both ends of the weighing plate; Two guide shafts, one end of which is connected to the mounting base; Two linear bearings are installed on the support beam of the track bridge, and the other ends of the two guide shafts are respectively inserted into the two linear bearings in a one-to-one correspondence.

5. The fixed vehicle lifting machine according to claim 4, characterized in that: Each of the lifting modules includes a synchronous hydraulic cylinder, which is installed on the mounting base. When performing weighing operations, the synchronous hydraulic cylinder is actuated to lift the beam-type weighing module. When the train travels along the track bridge to the beam-type weighing module, the wheel rim of the train contacts the guide block and gradually rises, so that the tread of the train wheel leaves the auxiliary rail of the track bridge, and then the wheel rim of the train wheel directly contacts the weighing plate to achieve weighing.

6. The fixed vehicle lifting machine according to claim 5, characterized in that: It also includes a hydraulic pump, which synchronously drives multiple synchronous hydraulic cylinders.

7. The fixed vehicle lifting machine according to claim 4, characterized in that: The weighing plate is connected to the sensor via a pin.

8. The fixed vehicle lifting machine according to claim 4, characterized in that: The sensor is a double shear beam sensor.

9. The fixed vehicle lifting machine according to claim 1, wherein: The track bridge also includes a wheel position detection module installed in the track bridge. After the beam-type weighing module is lowered, the wheel position detection module is used to perform wheel position detection.

10. The fixed vehicle lifting machine according to claim 9, characterized in that: The wheel arrival detection module includes: a photoelectric sensor, a reflective plate and a photoelectric sensor mounting plate. The photoelectric sensor mounting plate is installed on the track bridge, the photoelectric sensor is installed on the photoelectric sensor mounting plate, and the reflective plate is installed on the track bridge and arranged opposite to the photoelectric sensor. After lowering the beam-type weighing module, the photoelectric sensor emits an infrared signal to illuminate the reflective plate. The infrared light is reflected and then received by the photoelectric sensor. When the train is parked in the correct position, the train wheels block the infrared light and the signal is blocked, thereby realizing wheel arrival detection.

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