A loading test bench device for heavy-duty drive axles of port automated guided vehicles

Abstract

The present invention relates to a loading test bench device for a heavy-duty drive axle of an automated guided vehicle in a port. The device is characterized by comprising a test bench frame, an input device, a heavy-duty drive axle, steering rollers, a loading system, and detection components. After the heavy-duty drive axle is assembled, wheel hubs and tires are mounted on left and right wheel rim structures to form a complete single drive axle structure for loading testing. The test bench uses a prime mover (electric motor or hydraulic motor) identical to that used in actual working conditions as a driving source, and uses hydraulic cylinder loading as a load, completely simulating the method of increasing tire pressure in actual working conditions to achieve loading, thereby solving the problem of the lack of a platform for simultaneously testing functions such as large load loading, steering, and braking.

Description

Technical Field

[0001] The present invention relates to the technical field of port transportation, in particular to a loading test bench device for a heavy-duty drive axle of an automatic guided vehicle in a port. Background Art

[0002] In recent years, with the in-depth development of intelligent port equipment, automated guided vehicles (AGVs) responsible for horizontal transportation operations in automated terminals have also experienced rapid growth. However, as AGV performance continues to improve, performance testing of heavy-duty drive axles, a key component in the AGV structure, especially load testing, has become a bottleneck in verifying drive axles and improving AGV performance.

[0003] Currently, there is no independent load test bench specifically for port AGV heavy-duty drive axles, especially a platform that can simultaneously test large loads, steering functions, braking, etc. At present, the testing of AGV heavy-duty drive axles basically adopts the following methods:

[0004] 1. Heavy-duty drive axles are tested separately;

[0005] At present, the drive axle test alone cannot perform large load tests, which is generally only 30%-50% of the rated load and cannot reflect the actual drive axle performance;

[0006] As for the drive axle function test, the current independent drive axle test bench cannot perform steering tests and brake operating condition capability tests; there is a lack of test data on the entire operating function of the drive axle.

[0007] 2. After the drive axle and AGV are assembled, test them together;

[0008] This method is more common in port AGV testing and can overcome the problem of insufficient loading in method 1. It can also be used to test steering function and braking performance according to working conditions. However, this type of test is prone to the following problems:

[0009] 1) When a fault occurs during testing, it is difficult to analyze the cause of the fault; the problem cannot be directly reflected;

[0010] 2) Sufficient testing space is required, and the requirements for the testing site are high; especially for extreme working conditions (overload, overspeed), there are greater safety hazards;

[0011] 3) During the test process, if a component or device fails, a chain reaction will occur, affecting the safety and reliability of other components;

[0012] 4) AGV vehicles must be used for testing, which adds restrictions to the test;

[0013] The above two commonly used AGV drive axle test methods have many deficiencies in terms of test methods, results and test conditions. They cannot objectively reflect the performance of the actual drive axle, which in turn restricts the development of AGV in performance improvement. At the same time, they are also incompatible with the current development of intelligence. Summary of the Invention

[0014] The technical problem to be solved by the present invention is to provide a loading test bench device for heavy-duty drive axles of port automatic guided vehicles, which can solve the problem that general heavy-duty drive axle load tests cannot fully simulate actual working conditions for testing.

[0015] To solve the above technical problems, the technical solution of the present invention is: a loading test bench device for a heavy-duty drive axle of a port automated guided vehicle, the innovation of which is that it includes a test bench frame, an input device, a heavy-duty drive axle, steering rollers, a loading system and detection components;

[0016] The test bench frame is a rectangular parallelepiped frame structure; a loading system mounting seat is provided at the top of the test bench frame; a pair of steering rollers are provided below the test bench frame for supporting a heavy-duty drive axle; a wheel hub and tires are provided on the heavy-duty drive axle, and the tires are placed on the steering rollers;

[0017] The input device is provided on one side of the test bench frame. The input device is an input motor, and the output end of the input device is connected to the input end of the heavy-duty drive axle through a universal joint, and the tires of the heavy-duty drive axle are driven to rotate by the input device.

[0018] The loading system is installed on the loading system mounting seat at the top of the test bench frame, and the loading system is located above the heavy-duty drive axle. The input end of the loading system is connected to the heavy-duty drive axle to apply pressure to the heavy-duty drive axle to simulate the load of the heavy-duty drive axle.

[0019] The detection components include a torque meter, a three-dimensional vibration sensor and a temperature sensor; the torque meter is installed between the input motor and the heavy-duty drive axle; it collects the input motor torque, clarifies the actual input capacity, and indirectly reflects the loading condition and transmission efficiency; the three-dimensional vibration sensor is installed between the input component of the heavy-duty drive axle and the wheel rims of the left and right wheels; it detects the vibration of the heavy-duty drive axle in real time, and can obtain different vibration values ​​through changes in load to understand the actual operating status of the heavy-duty drive axle; the temperature sensor is installed between the input component of the heavy-duty drive axle and the wheel rims of the left and right wheels; it provides real-time feedback on the operating temperature of internal transmission components, indirectly reflecting the movement status of each component.

[0020] Furthermore, the loading system power source adopts a hydraulic cylinder loading method. The hydraulic cylinder is fixed to the top of the test bench frame and the cylinder is controlled by hydraulic pressure for precise loading. The load is transmitted to the heavy-duty drive axle through the frame structure, and the connection between the frame and the heavy-duty drive axle completely simulates the connection structure between the actual AGV and the axle, completing the pressure of the tire on the steering roller surface.

[0021] Furthermore, the steering roller includes a roller, a roller base and a pedestal; the roller is installed on the roller base through a rotating shaft and a bearing, and the roller is used to support the tire, is in full contact with the tire surface, and bears the tire pressure; during operation, friction is used to realize the rotation of the tire in place, simulating the operating conditions of the drive axle; the roller base is installed on the pedestal through a thrust bearing, and a rotating plane is formed between the roller base and the pedestal. When the steering system on the heavy-duty drive axle is activated, the roller base and the pedestal are driven to achieve an angular rotation; thereby simulating the actual tire steering process.

[0022] The advantages of the present invention are:

[0023] 1) After the heavy-duty drive axle is assembled, the wheels and tires are installed on the left and right wheel rim structures to form a complete single drive axle structure for load testing. The test bench uses the same prime mover (electric motor or hydraulic motor) as the actual working conditions as the drive source, and uses hydraulic cylinder loading as the load, fully simulating the actual working conditions by increasing tire pressure to achieve loading. This solves the problem of the lack of a platform for simultaneous testing of large load loading, steering function, braking function, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 The present invention is a schematic diagram of the main structure of a loading test bench device for a heavy-duty drive axle of a port automated guided vehicle.

[0026] Figure 2 The figure is a schematic side view of the structure of a loading test bench device for a heavy-duty drive axle of a port automated guided vehicle according to the present invention.

[0027] Figure 3 The present invention is a schematic diagram of the steering roller structure of a loading test bench device for a heavy-duty drive axle of a port automated guided vehicle. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] like Figure 1 Only Figure 3 The loading test bench device shown is for a heavy-duty drive axle of a port automated guided vehicle, and includes a test bench frame 1 , an input device 2 , a heavy-duty drive axle 3 , a steering roller 4 , a loading system 5 and a detection component 6 .

[0031] The test bench frame 1 is a rectangular frame structure; a loading system mounting seat is provided at the top of the test bench frame 1; a pair of steering rollers 4 are provided below the test bench frame 1 to support the heavy-duty drive axle 3; the heavy-duty drive axle 3 is equipped with wheels and tires, and the tires are placed on the steering rollers 4.

[0032] The input device 2 is arranged on one side of the test bench frame 1. The input device 2 is an input motor, and the output end of the input device 2 is connected to the input end of the heavy-duty drive axle 3 through a universal joint 8. The tires of the heavy-duty drive axle 3 are driven to rotate through the input device 2.

[0033] The loading system 5 is set on the loading system mounting seat at the top of the test bench frame 1, and the loading system 5 is located above the heavy-duty drive axle 3. The input end of the loading system 5 is connected to the heavy-duty drive axle 3, and pressure is applied to the heavy-duty drive axle 3 to simulate the load-bearing of the heavy-duty drive axle 3.

[0034] The detection components 6 include a torque meter 61, a three-axis vibration sensor 62 and a temperature sensor 63; the torque meter 61 is installed between the input motor and the heavy-duty drive axle 3; it collects the input motor torque, clarifies the actual input capacity, and indirectly reflects the loading condition and transmission efficiency; the three-axis vibration sensor 62 is installed between the input component of the heavy-duty drive axle 3 and the left and right wheel sides; it detects the vibration condition of the heavy-duty drive axle 3 in real time, and can obtain different vibration values ​​through changes in load to understand the actual operating status of the heavy-duty drive axle; the temperature sensor 63 is installed between the input component of the heavy-duty drive axle 3 and the left and right wheel sides; it provides real-time feedback on the operating temperature of the internal transmission components, indirectly reflecting the movement status of each component.

[0035] The power source of the loading system 5 adopts the hydraulic cylinder loading method. The hydraulic cylinder is fixed to the top of the test bench frame and the cylinder is precisely loaded by hydraulic pressure control. The load is transmitted to the heavy-duty drive axle through the frame 7. The connection between the frame 7 and the heavy-duty drive axle 3 completely simulates the connection structure between the actual AGV and the axle, completing the pressure of the tire on the surface of the steering roller 4.

[0036] The steering roller 4 includes a roller 41, a roller base 42 and a base 43; the roller 41 is installed on the roller base 42 through a rotating shaft and a bearing. The roller 41 is used to support the tire, is in full contact with the tire surface, and bears the tire pressure; during operation, friction is used to realize the rotation of the tire in place, simulating the operating conditions of a heavy-duty drive axle; the roller base 42 is installed on the base 43 through a thrust bearing, and a rotation plane is formed between the roller base 42 and the base 43. When the steering system on the heavy-duty drive axle 3 is activated, the roller base 42 and the base 43 are driven to rotate at an angle, thereby simulating the actual tire steering process.

[0037] The working principle of the present invention is as follows: after the heavy-duty drive axle is assembled, the wheel hubs and tires are installed on the left and right wheel side structures to form a complete single drive axle structure for load testing; the test bench adopts the same prime mover (electric motor or hydraulic motor) as the actual working conditions as the driving source, and uses hydraulic cylinder loading as the load, completely simulating the actual working conditions to increase tire pressure to achieve loading, solving the problem of the lack of a platform for simultaneous testing of large load loading, steering function, braking function and other functions.

[0038] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. A loading test bench device for heavy-duty drive axles of port automated guided vehicles, characterized by: Includes test bench frame, input device, heavy-duty drive axle, steering rollers, loading system and detection components; The test bench frame is a rectangular parallelepiped frame structure; a loading system mounting seat is provided at the top of the test bench frame; a pair of steering rollers are provided below the test bench frame for supporting a heavy-duty drive axle; a wheel hub and tires are provided on the heavy-duty drive axle, and the tires are placed on the steering rollers; The input device is provided on one side of the test bench frame. The input device is an input motor, and the output end of the input device is connected to the input end of the heavy-duty drive axle through a universal joint, and the tires of the heavy-duty drive axle are driven to rotate by the input device. The loading system is installed on the loading system mounting seat at the top of the test bench frame, and the loading system is located above the heavy-duty drive axle. The input end of the loading system is connected to the heavy-duty drive axle to apply pressure to the heavy-duty drive axle to simulate the load of the heavy-duty drive axle. The detection components include a torque meter, a three-axis vibration sensor and a temperature sensor; The torque meter is installed between the input motor and the heavy-duty drive axle; it collects the input motor torque, clarifies the actual input capacity, and indirectly reflects the loading condition and transmission efficiency; the three-way vibration sensor is installed at the input component of the heavy-duty drive axle and the wheel rims of the left and right wheels; Real-time detection of the vibration of the heavy-duty drive axle, and the ability to obtain different vibration values ​​through changes in load to understand the actual operating status of the heavy-duty drive axle; the temperature sensor is installed at the input component of the heavy-duty drive axle and the wheel edges of the left and right wheels; Real-time feedback of the operating temperature of internal transmission components indirectly reflects the movement status of each component.

2. The loading test bench device for heavy-duty drive axles of port automated guided vehicles according to claim 1 is characterized by: The loading system is powered by a hydraulic cylinder mounted on the top of the test bench frame. The cylinder is precisely loaded using hydraulic pressure control. The load is transferred to the heavy-duty drive axle via the vehicle frame, and the connection between the frame and the heavy-duty drive axle completely simulates the actual connection structure between the AGV and the axle, ensuring that the tire exerts pressure on the surface of the steering roller.

3. The loading test bench device for heavy-duty drive axles of port automated guided vehicles according to claim 1 is characterized by: The steering roller includes a roller, a roller base and a pedestal; the roller is installed on the roller base through a rotating shaft and a bearing. The roller is used to support the tire, is in full contact with the tire surface, and bears the tire pressure; during operation, friction is used to realize the rotation of the tire in place, simulating the operating conditions of a heavy-duty drive axle; the roller base is installed on the pedestal through a thrust bearing, and a rotating plane is formed between the roller base and the pedestal. When the steering system on the heavy-duty drive axle is activated, the roller base and the pedestal are driven to achieve an angular rotation, thereby simulating the actual tire steering process.

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