Loading test bench device for heavy drive axle of automatic guided vehicle of port

Abstract

The invention relates to a loading test bed device for a heavy drive axle of an automatic guided vehicle of a port. The loading test bed device is characterized by comprising a test bed frame, an input device, the heavy drive axle, a steering carrier roller, a loading system and a detection component, after the heavy drive axle is assembled, hubs and tires are mounted on the left wheel edge structure and the right wheel edge structure to form a set of complete single drive axle structure for a loading test; the test bed adopts a prime motor (motor or hydraulic motor) which is the same as an actual working condition as a driving source, hydraulic oil cylinder loading is used as a load, loading is realized by completely simulating a mode of increasing tire pressure in the actual working condition, and the problem that a platform for simultaneously testing functions such as heavy load loading, steering function and braking function is lacked is solved.

Description

Technical Field

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

[0002] In recent years, with the in-depth development of intelligent port equipment, the automatic guided vehicles (AGVs) responsible for the horizontal transportation operations of automated terminals have also developed rapidly; however, with the continuous improvement of AGV performance, the performance test of heavy-duty drive axles, which are important components in the AGV structure, especially the load test, has become a bottleneck in verifying the drive axles and improving the performance of AGVs.

[0003] At present, there is no independent load test bench specifically for port AGV heavy-duty drive axles, especially a platform for simultaneous testing of large load loading, steering function, braking and other functions. At present, the testing of AGV heavy-duty drive axles basically adopts the following methods: 1. Heavy-duty drive axles are tested separately; At present, the drive axle test alone cannot perform large load tests, which are generally only 30%-50% of the rated load and cannot reflect the actual drive axle performance; As far as the drive axle function test is concerned, 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.

[0004] 2. After the drive axle and AGV vehicle are assembled, test them together; 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 in accordance with working conditions. However, this type of test is prone to the following problems: 1) When a fault occurs during the test, it is difficult to analyze the cause of the fault; the problem cannot be directly reflected; 2) There needs to be sufficient testing space and the requirements for the testing site are high; especially for extreme working conditions (overload, overspeed), there are great safety hazards; 3) During the test, if a part or component fails, a chain reaction will occur, affecting the safety and reliability of other parts; 4) AGV vehicles must be used for testing, which adds restrictions to the test; 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, and are also inconsistent with the current intelligent development. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a loading test bench device for a heavy-duty drive axle of a port automatic guided vehicle, which can solve the problem that a general heavy-duty drive axle load test cannot be tested by fully simulating actual working conditions.

[0006] In order 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 automatic guided vehicle, the innovation of which is: comprising a test bench frame, an input device, a heavy-duty drive axle, a steering roller, a loading system and detection components; The test bench frame is a rectangular parallelepiped frame structure; a loading system mounting seat is arranged at the top of the test bench frame; a pair of steering rollers are arranged below the test bench frame to support a heavy-duty drive axle; a wheel hub and a tire are arranged on the heavy-duty drive axle, and the tire is placed on the steering roller; The input device is arranged 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 tire of the heavy-duty drive axle is driven to rotate through the input device; The loading system is arranged on a loading system mounting seat at the top of the test bench frame, and the loading system is located above the heavy-duty drive axle, and the input end of the loading system is connected to the heavy-duty drive axle, and pressure is applied 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-way 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 between the input component of the heavy-duty drive axle and the left and right wheel sides; 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 left and right wheel sides; it feeds back the operating temperature of the internal transmission components in real time, and indirectly reflects the movement status of each component.

[0007] Furthermore, the power source of the loading system 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 to perform 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 surface of the steering roller.

[0008] 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, 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 situ, 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, and when the steering system on the heavy-duty drive axle is activated, the roller base and the pedestal are driven to achieve an angle rotation; thereby simulating the actual tire steering process.

[0009] The advantages of the present invention are: 1) After the heavy-duty drive axle of the present invention is assembled, the wheel hub and tire are installed on the left and right wheel side structures to form a complete single drive axle structure for loading test; the test bench adopts the same prime mover (motor or hydraulic motor) as the actual working condition as the driving source, and uses the hydraulic cylinder loading as the load, which completely simulates the way of increasing tire pressure in the actual working condition to achieve loading, and solves the problem of lack of a platform for simultaneous testing of large load loading, steering function, braking and other functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0011] Figure 1 It is a schematic diagram of the main structure of a loading test bench device for a heavy-duty drive axle of a port automatic guided vehicle according to the present invention.

[0012] Figure 2 It is a schematic diagram of the side main view of the structure of a loading test bench device for a heavy-duty drive axle of a port automatic guided vehicle according to the present invention.

[0013] 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 automatic guided vehicle. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 here can be arranged and designed in various different configurations.

[0015] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1 Only Figure 3 The loading test bench device for a heavy-duty drive axle of a port automated guided vehicle shown in the figure comprises 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.

[0017] The test bench frame 1 is a rectangular frame structure; a loading system mounting seat is arranged at the top of the test bench frame 1; a pair of steering rollers 4 are arranged below the test bench frame 1 to support the heavy-duty drive axle 3; the heavy-duty drive axle 3 is provided with wheels and tires, and the tires are placed on the steering rollers 4.

[0018] 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 tire of the heavy-duty drive axle 3 is driven to rotate through the input device 2 .

[0019] The loading system 5 is arranged on a 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, and 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.

[0020] The detection components 6 include a torque meter 61, a three-way 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-way 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 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 feeds back the operating temperature of the internal transmission components in real time, and indirectly reflects the movement status of each component.

[0021] The power source of the loading system 5 adopts the hydraulic cylinder loading method. The hydraulic cylinder is fixed at the top of the test bench frame and the cylinder is accurately loaded by hydraulic pressure control. The load is transmitted to the heavy-duty drive axle through the frame 7, and 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.

[0022] 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, the friction force is used to realize the rotation of the tire in situ, simulating the operating condition of the heavy-duty drive axle; the roller base 42 is installed on the base 43 through a thrust bearing, and a rotating 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.

[0023] The working principle of the present invention is: after the heavy-duty drive axle is assembled, the wheel hub and tire are installed on the left and right wheel side structures to form a complete single drive axle structure for loading test; the test bench adopts the same prime mover (motor or hydraulic motor) as the actual working condition as the driving source, and uses the hydraulic cylinder loading as the load, which completely simulates the way of increasing tire pressure in the actual working condition to achieve loading, thus solving the problem of lack of a platform for simultaneous testing of large load loading, steering function, braking and other functions.

[0024] 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 all fall within the scope of the present invention claimed for protection.

Claims

1. A loading test bench device for heavy-duty drive axles of port automatic guided vehicles, characterized in that: 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 arranged at the top of the test bench frame; a pair of steering rollers are arranged below the test bench frame to support a heavy-duty drive axle; a wheel hub and a tire are arranged on the heavy-duty drive axle, and the tire is placed on the steering roller; The input device is arranged 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 tire of the heavy-duty drive axle is driven to rotate through the input device; The loading system is arranged on a loading system mounting seat at the top of the test bench frame, and the loading system is located above the heavy-duty drive axle, and the input end of the loading system is connected to the heavy-duty drive axle, and pressure is applied 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-way 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 edges of the left and right wheels; The vibration of the heavy-duty drive axle is detected in real time, and different vibration values ​​can be obtained 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 power source of the loading system adopts the hydraulic cylinder loading method. The hydraulic cylinder is fixed at 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, 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 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, the friction force is used to realize the rotation of the tire in situ, 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 angle rotation, thereby simulating the actual tire steering process.

Images