A dual variable and drive axle inspection and test device

Abstract

This utility model belongs to the field of vehicle transmission system testing technology, and particularly relates to a dual-transmission and drive axle repair and testing device. It includes a mounting bracket, one end of which is fixedly mounted with a drive motor and a torque converter. The output end of the torque converter is connected in parallel to a hydraulic pump, a transmission pump, and a first drive shaft. The output end of the first drive shaft is sequentially connected to a gearbox, a second drive shaft, and a drive axle. A locking device is installed on the mounting bracket at a position corresponding to the power output end of the gearbox. This utility model achieves switching between three states—gearbox and drive axle assembly testing, gearbox individual testing, and drive axle individual testing—by switching the drive shaft connection method, controlling the on / off state of the ball valve, and using the locking device. This eliminates the need to replace the entire equipment, significantly improving the device's practicality and adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle transmission system testing technology, and in particular relates to a dual-variable transmission and drive axle repair and testing device. Background Technology

[0002] In the transmission system of mining machinery, the gearbox and drive axle are core components. The two work together to transmit and adapt power. Due to their harsh working environment, the gearbox and drive axle are prone to failures such as gear wear, bearing damage, oil seal leakage, and lubricant deterioration. Manufacturers need to promptly inspect and analyze faulty parts in order to accurately locate the cause of the failure, optimize the design and manufacturing process, and improve product quality.

[0003] Chinese utility model patent application number 202420611722.X discloses a gearbox testing system based on flexible transmission, including a drive motor, a hydraulic pump, a motor and a load motor connected in sequence to provide power to the gearbox and perform testing; Chinese utility model patent application number 202021305315.4 discloses a performance testing device for an integrated gearbox axle for tractors, used to perform performance testing on the integrated gearbox axle.

[0004] These two types of equipment either focus only on the performance testing of a single component and cannot simulate the actual operating state under the linkage of the assembly, or they are only suitable for integrated assembly testing and cannot trace and troubleshoot faulty components individually. The single function of the equipment requires enterprises to purchase multiple devices to meet different testing needs, which greatly increases the cost of equipment purchase and maintenance.

[0005] Therefore, there is an urgent need to develop a multi-functional testing and inspection device that can test the gearbox or drive axle separately, as well as the two assemblies, to achieve full coverage of testing scenarios and improve testing efficiency and economy. Utility Model Content

[0006] The main technical problem to be solved by this utility model is to provide a dual-transmission and drive axle repair and testing device. By switching the transmission shaft connection method, controlling the on and off of the ball valve and using a locking device, it can switch between three states: transmission and drive axle assembly testing, transmission testing alone, and drive axle testing alone. It is highly practical and widely adaptable.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A dual-transformer and drive axle overhaul and testing device includes a mounting bracket. A drive motor is fixedly mounted on one end of the mounting bracket. The output end of the drive motor is connected to a torque converter. The output end of the torque converter is connected in parallel to a hydraulic pump, a transmission pump, and a first drive shaft. The output end of the first drive shaft is sequentially connected to a gearbox, a second drive shaft, and a drive axle. The hydraulic pump provides power to release the brakes from the drive axle, and the transmission pump provides working oil to the gearbox. A locking device is installed on the mounting bracket at a position corresponding to the power output end of the gearbox, which provides a stable reverse torque to the power output end of the gearbox when only the gearbox needs to be tested.

[0008] The following are further optimizations of the above technical solution by this utility model: The locking device includes a connecting flange connected to the power output end of the second drive shaft. The shape of the connecting flange is adapted to the flange at the shaft end of the second drive shaft. The two are fixedly connected by bolts. A connecting rod is provided on the side of the connecting flange away from the second drive shaft. The end of the connecting rod away from the connecting flange is fixedly connected to the mounting bracket.

[0009] Further optimization: The oil inlet of the transmission pump is connected to the hydraulic oil tank via a pipeline, and the oil outlet is connected to the gearbox, providing the gearbox with a continuous and stable working oil. A filter and an oil temperature sensor are also connected in sequence on the pipeline between the transmission pump and the gearbox.

[0010] Further optimization: The oil inlet of the hydraulic pump is connected to the hydraulic oil tank through a pipeline, and the oil outlet is connected to the drive axle. The hydraulic pump injects hydraulic oil at a certain pressure into the brake of the drive axle to release the brake of the drive axle.

[0011] Further optimization: A relief valve, a pressure reducing valve, and a ball valve are connected in sequence on the pipeline between the hydraulic pump and the drive axle. The pressure reducing valve is electrically connected to the brake pressure gauge on the test bench. Depending on the type of component being tested, the ball valve is controlled to open and close, thereby controlling the flow of the oil circuit.

[0012] Further optimization: The gearbox is fixedly connected to the mounting bracket via the first connecting frame, and the drive axle is fixedly connected to the mounting bracket via the second connecting frame.

[0013] The present invention adopts the above technical solution and has the following beneficial effects: The monitoring device of this utility model can realize three states: transmission and drive axle assembly detection, transmission individual detection, and drive axle individual detection. By switching the transmission shaft connection method, controlling the on / off state of the ball valve, and using a locking device, the working condition can be switched without replacing the entire set of equipment, which greatly improves the practicality of the device and has wide adaptability.

[0014] This invention is designed for individually testing the state of a transmission. It includes a locking device that is connected to the second drive shaft via a connecting flange. This provides a stable reverse torque for the transmission being tested individually, effectively limiting idling and accurately simulating the working conditions of the transmission under load. This provides reliable data support for transmission fault diagnosis and performance optimization.

[0015] The transmission shaft of this utility model adopts a flexible coupling or universal joint structure, which can eliminate coaxiality errors caused by installation deviations and vibration impacts, and reduce power loss and component wear. The torque converter receives the power output from the drive motor, realizes flexible adjustment of torque and speed, and has the functions of shock buffering and overload protection, providing stable and suitable power for each component and improving the accuracy of test data.

[0016] The transmission pump oil circuit of this utility model is equipped with a filter and an oil temperature sensor, which can filter impurities in the oil and monitor the system oil temperature in real time, avoiding damage to the precision components inside the gearbox and the degradation of oil performance; the hydraulic pump oil circuit is equipped with an overflow valve and a pressure reducing valve, which can stabilize oil pressure and prevent overload, and the ball valve can flexibly control the oil circuit opening and closing, ensuring the safety of the oil circuit system and core components in all aspects during the testing process.

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a front view of the overall structure of the transmission and drive axle assembly tested according to this utility model. Figure 2 This is a schematic diagram of the hydraulic system of this utility model; Figure 3 This is a three-dimensional view of the overall structure of the present invention when testing a gearbox; Figure 4 This is a three-dimensional view of the overall structure of the drive axle when testing the present invention.

[0019] In the diagram: 1. Mounting bracket; 2. Drive motor; 3. Torque converter; 4. Hydraulic pump; 5. Transmission pump; 6. First drive shaft; 7. Second drive shaft; 8. Gearbox; 9. Drive axle; 10. First connecting frame; 11. Second connecting frame; 12. Locking device; 1201. Connecting flange; 1202. Connecting rod; 13. Filter; 14. Oil temperature sensor; 15. Relief valve; 16. Pressure reducing valve; 17. Ball valve. Detailed Implementation

[0020] like Figure 1-2As shown, a dual-variable and drive axle maintenance and testing device includes a mounting bracket 1, which secures the entire device to the ground and provides compatible mounting interfaces for various components. A drive motor 2 is fixedly mounted at one end of the mounting bracket 1. The output end of the drive motor 2 is connected to a torque converter 3. The output end of the torque converter 3 is connected in parallel to a hydraulic pump 4, a transmission pump 5, and a first drive shaft 6. The output end of the first drive shaft 6 is sequentially connected to a gearbox 8, a second drive shaft 7, and a drive axle 9. The drive axle 9 is a closed-type brake axle. The hydraulic pump 4 provides a power source for releasing the brakes on the drive axle 9, and the transmission pump 5 provides working oil to the gearbox 8.

[0021] In this embodiment, the torque converter 3 can be one of a mechanical torque converter, a hydraulic torque converter, or an electro-hydraulic torque converter, used to receive the power output from the drive motor, realize flexible adjustment of torque and speed, buffer the impact load during power transmission, have overload protection capability, and provide a stable and compatible power source for the subsequent hydraulic pump 4, transmission pump 5 and first transmission shaft 6.

[0022] In this embodiment, the torque converter 3 is a general-purpose tooling torque converter used to transmit the power output from the drive motor 2 to downstream components, ensuring the normal operation of the testing device. In the actual testing process, the tooling torque converter can be removed and replaced with the torque converter to be tested that is normally installed on the vehicle, so as to realize the performance debugging or fault detection of the torque converter to be tested, so as to meet different testing needs in the production process and improve the versatility of the equipment.

[0023] During testing, the drive motor 2 outputs rotational power, which is then regulated by the torque converter 3 to transmit the power to the parallel hydraulic pump 4, transmission pump 5, and first transmission shaft 6. The hydraulic pump 4 and transmission pump 5 start synchronously to provide precise power to the component under test. At the same time, the first transmission shaft 6 transmits the power step by step to the gearbox 8 and the second transmission shaft 7, so that the drive axle 9 simulates the actual working conditions and ensures the authenticity of the testing conditions.

[0024] In this embodiment, the first drive shaft 6 and the second drive shaft 7 can adopt a flexible coupling or a universal joint structure to eliminate the coaxiality error caused by installation deviation and vibration impact of the components at both ends of the connecting shaft, reduce the power loss and component wear caused by transmission clearance, ensure the stability of power transmission, and improve the accuracy of test data.

[0025] like Figure 1 As shown, the gearbox 8 is fixedly connected to the mounting bracket 1 via the first connecting frame 10, and the drive axle 9 is fixedly connected to the mounting bracket 1 via the second connecting frame 11. According to the installation requirements of different models of gearbox 8 and drive axle 9, the first connecting frame 10 and the second connecting frame 11 with corresponding structures can be replaced, which effectively improves the versatility of the testing device.

[0026] In addition to the above embodiments, the connection points between the first connecting frame 10 and the mounting bracket 1, and the connection points between the second connecting frame 11 and the mounting bracket 1, are respectively provided with elongated holes that are perpendicular to each other. The two sets of elongated holes cooperate to enable fine-tuning of the position of the connecting frame in the horizontal and vertical directions, improve the installation versatility of the first connecting frame 10 and the second connecting frame 11, reduce the number of tooling parts, and reduce the adaptation cost.

[0027] The gearbox shifting mechanism is connected to a gear position control device, which enables gear shifting and facilitates the detection of each gear in the gearbox.

[0028] like Figure 3 As shown, a locking device 12 is installed on the mounting bracket 1 at a position corresponding to the power output end of the gearbox 8. The locking device 12 is fixedly connected to the mounting bracket 1 by bolts. When only performance testing of the gearbox 8 is required, the power output end of the gearbox 8 is no longer connected to the drive axle 9, but is connected to the locking device 12 through the second drive shaft 7. The locking device 12 provides a stable reverse torque to the power output end of the gearbox 8, thereby limiting the idling phenomenon of the gearbox 8. This allows for a more accurate simulation of the actual working condition of the gearbox 8 under load, improving the accuracy and reliability of the performance test data of the gearbox 8, and providing scientific and effective data support for fault diagnosis and performance optimization of the gearbox 8.

[0029] The locking device 12 includes a connecting flange 1201 connected to the power output end of the second drive shaft 7. The shape of the connecting flange 1201 is adapted to the shaft end flange of the second drive shaft 7, and the two are fixedly connected by bolts. A connecting rod 1202 is provided on the side of the connecting flange 1201 away from the second drive shaft 7. The end of the connecting rod 1202 away from the connecting flange 1201 is fixedly connected to the mounting bracket 1.

[0030] The connecting rod 1202 and the connecting flange 1201 are detachably fixed together by bolts. According to the actual installation needs, the connecting rod 1202 of different lengths can be replaced to further expand the versatility of the detection device and adapt to the detection needs under more working conditions. The connecting rod 1202 can be made of high-strength alloy material to withstand the reverse torque at the output end of the gearbox and avoid deformation or breakage of the rod during the locking process.

[0031] like Figure 4 As shown, when only the drive axle 9 needs to be tested, the gearbox 8 and the second drive shaft 7 can be removed, and the output end of the first drive shaft 6 can be directly connected to the drive axle 9. The power of the drive motor 2, after the torque and speed are adjusted by the torque converter 3, directly drives the drive axle 9 through the first drive shaft 6, thereby realizing the separate testing of the drive axle 9.

[0032] like Figure 2As shown, the oil inlet of the transmission pump 5 is connected to the hydraulic oil tank through a pipeline, and the oil outlet is connected to the gearbox 8, providing the gearbox 8 with a continuous and stable working oil, ensuring that the gearbox 8 can achieve smooth shifting, component lubrication and protection, and heat dissipation, and ensuring that the gearbox 8 operates normally under simulated working conditions.

[0033] A filter 13 and an oil temperature sensor 14 are connected in sequence on the pipeline between the transmission pump 5 and the gearbox 8. The filter 13 is used to filter impurities in the oil to prevent contaminants from entering the gearbox 8 and causing wear, scratches, or blockage of precision components such as gears, bearings, and seals. The oil temperature sensor 14 is electrically connected to the oil temperature gauge on the test bench to monitor the oil temperature in the pipeline in real time. This prevents the oil from becoming less viscous and its lubricating performance from deteriorating due to excessively high temperatures. At the same time, it prevents the oil from becoming less fluid and increasing shifting resistance due to low temperatures, ensuring that the gearbox 8 is always in the optimal oil operating temperature range. When the oil temperature exceeds the set threshold, it can trigger an alarm in the detection system or automatically shut down, improving the safety of the device.

[0034] like Figure 2 As shown, the oil inlet of the hydraulic pump 4 is connected to the hydraulic oil tank through a pipeline, and the oil outlet is connected to the drive axle 9. Since the drive axle 9 is a closed brake axle, a certain pressure of hydraulic oil needs to be injected into the brake of the drive axle 9 to overcome the elastic force of the brake spring and release the brake, so that the power output by the drive motor 2 can smoothly drive the drive axle 9 to operate.

[0035] A relief valve 15, a pressure reducing valve 16, and a ball valve 17 are sequentially connected on the pipeline between the hydraulic pump 4 and the drive axle 9. The relief valve 15 is used to adjust the oil pressure in the pipeline according to the pressure requirements of different drive axles, preventing damage to components caused by excessive oil pressure and playing an overload protection role. The pressure reducing valve 16 is electrically connected to the brake pressure gauge on the test bench, and is used to stabilize and adjust the oil pressure in the pipeline to the set pressure value required to release the brake of the drive axle 9. The brake pressure gauge provides real-time feedback on the current pipeline pressure status, which is convenient for operators to monitor and calibrate.

[0036] Ball valve 17 is used to control the opening and closing of the pipeline. When it is necessary to test the assembly of gearbox 8 and drive axle 9 or the drive axle 9 alone, ball valve 17 is opened and hydraulic pump 4 works to release the brake of drive axle 9. When it is only necessary to test gearbox 8 or to adjust pipeline pressure, ball valve 17 is closed and this oil circuit is disconnected.

[0037] Based on actual usage requirements, the transmission pump 5 and hydraulic pump 4 can be selected from gear pumps, vane pumps, piston pumps, or other existing oil pumps to deliver oil from the hydraulic tank to the gearbox 8 and drive axle 9. Gear pumps are suitable for low-pressure, high-flow conditions, while piston pumps are suitable for high-pressure, high-precision control conditions. The appropriate type can be selected according to the parameter requirements of the object being tested to ensure that the testing work proceeds normally.

[0038] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A dual-variable and drive axle maintenance and testing device, comprising a mounting bracket (1), a drive motor (2) fixedly mounted at one end of the mounting bracket (1), and a torque converter (3) connected to the output end of the drive motor (2), characterized in that: The output end of the torque converter (3) is connected in parallel with a hydraulic pump (4), a transmission pump (5) and a first transmission shaft (6). The output end of the first transmission shaft (6) is connected in sequence with a gearbox (8), a second transmission shaft (7) and a drive axle (9). The hydraulic pump (4) is used to provide a power source for releasing the brake of the drive axle (9), and the transmission pump (5) is used to provide working oil to the gearbox (8). A locking device (12) is installed on the mounting bracket (1) at a position corresponding to the power output end of the gearbox (8), which is used to provide a stable reverse torque to the power output end of the gearbox (8) when only the gearbox (8) needs to be tested.

2. The dual-variable transformer and drive axle overhaul and testing device according to claim 1, characterized in that: The locking device (12) includes a connecting flange (1201) connected to the power output end of the second drive shaft (7). The shape of the connecting flange (1201) is adapted to the shaft end flange of the second drive shaft (7). The two are fixedly connected by bolts. A connecting rod (1202) is provided on the side of the connecting flange (1201) away from the second drive shaft (7). The end of the connecting rod (1202) away from the connecting flange (1201) is fixedly connected to the mounting bracket (1).

3. The dual-variable transformer and drive axle overhaul and testing device according to claim 2, characterized in that: The oil inlet of the transmission pump (5) is connected to the hydraulic oil tank through a pipeline, and the oil outlet is connected to the gearbox (8) to provide the gearbox (8) with continuous and stable working oil. A filter (13) and an oil temperature sensor (14) are also connected in sequence on the pipeline between the transmission pump (5) and the gearbox (8).

4. The dual-variable and drive axle overhaul and testing device according to claim 3, characterized in that: The oil inlet of the hydraulic pump (4) is connected to the hydraulic oil tank through a pipeline, and the oil outlet is connected to the drive axle (9). The hydraulic pump (4) injects hydraulic oil at a certain pressure into the brake of the drive axle (9) to release the brake of the drive axle (9).

5. The dual-variable and drive axle overhaul and testing device according to claim 4, characterized in that: An overflow valve (15), a pressure reducing valve (16), and a ball valve (17) are connected in sequence on the pipeline between the hydraulic pump (4) and the drive axle (9). The pressure reducing valve (16) is electrically connected to the brake pressure gauge on the test bench. Depending on the type of test component, the ball valve (17) is controlled to open and close, thereby realizing the connection and disconnection of the oil circuit.

6. A dual-variable transformer and drive axle overhaul and testing device according to any one of claims 1-5, characterized in that: The gearbox (8) is fixedly connected to the mounting bracket (1) via the first connecting frame (10), and the drive axle (9) is fixedly connected to the mounting bracket (1) via the second connecting frame (11).

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