Heavy-duty automatic mechanical transmission cylinder durability test device, method and equipment

Abstract

The present invention discloses a heavy-duty automatic transmission cylinder durability test device, method, and equipment, relating to the field of vehicle component testing. The device comprises a load assembly and a compression assembly. The load assembly comprises a horizontal load cylinder and a vertical load cylinder arranged perpendicularly to each other. The horizontal load cylinder is provided with a horizontal piston connecting rod with a groove on its surface for connecting to a test cylinder, and the vertical load cylinder is provided with a vertical piston connecting rod that abuts against the surface of the groove of the horizontal piston connecting rod. The compression assembly comprises a compressed air tank. When the test cylinder drives the horizontal piston connecting rod to move, the contact position between the vertical piston connecting rod and the horizontal piston connecting rod is changed, thereby changing the stroke of the vertical load cylinder and adjusting the abutment force of the vertical piston connecting rod on the horizontal piston connecting rod. This application can effectively simulate the cylinder load characteristics during a real transmission shifting process.

Description

Technical Field

[0001] The present application relates to the field of vehicle component testing, and in particular to a heavy-duty automatic mechanical transmission cylinder durability testing device, method, and equipment. Background Art

[0002] The heavy-duty automatic transmission cylinder durability test bench primarily consists of a 24V power supply, wiring harness, solenoid valve, compressed air, air pipe, test cylinder, piston connecting rod, load cylinder, and equipment fixture. The electrical section consists of the 24V power supply, wiring harness, and solenoid valve connected in sequence. The air source, solenoid valve, air pipe, and test cylinder are connected in sequence. The load cylinder is connected to the air source. One end of the piston connecting rod is connected to the test cylinder piston, and the other end is connected to the load cylinder. The test cylinder, piston connecting rod, and load cylinder are arranged horizontally. Turn on the 24V power supply and control the opening and closing of the solenoid valve. When the solenoid valve is open, compressed air enters the test cylinder through the solenoid valve, pushing the piston to the other side. The piston connecting rod pushes the load cylinder piston to move. Since compressed air is already connected to the other side of the load cylinder, the load cylinder piston will encounter a certain amount of resistance during movement (this resistance is determined by the compressed air pressure in the load cylinder and can be large or small). This resistance is transmitted through the piston connecting rod to the test cylinder piston, acting as the test cylinder's load. In addition, the load cylinder can also be replaced by a spring. Both loads increase linearly. The relationship between piston displacement, load and time is as follows: Figure 1 As shown in the figure, the relationship between displacement and time in the actual shifting process is as follows Figure 2 shown.

[0003] In the aforementioned test scheme, the force applied by the load cylinder to the test cylinder increases as the compression stroke increases. If a spring load is used, the force applied to the test cylinder also increases as the compression stroke increases. In the actual gearshift process, a solenoid valve controls the flow of compressed air into the shift cylinder, causing the piston to push the shift fork and gear sleeve toward the target gear. During the initial shift, the gear sleeve is in gear or neutral, experiencing minimal resistance. When the gear sleeve reaches the target gear engagement position, it experiences significant resistance to synchronize the target gear with the spindle speed (which exhibits a speed difference). This phase is called the synchronization phase. Once the speeds are synchronized, the gear sleeve resistance decreases significantly, pushing the gear sleeve into the target gear. This phase is called the shift phase. Therefore, the cylinder load during a real shift is divided into three distinct phases. Therefore, the resistance applied to the test cylinder by conventional test equipment increases linearly, failing to simulate the actual cylinder load characteristics, thus preventing accurate and effective cylinder testing. Summary of the Invention

[0004] The present application provides a heavy-duty automatic mechanical transmission cylinder durability test device, method and equipment, which can effectively simulate the cylinder load characteristics of the actual transmission shifting process.

[0005] In a first aspect, an embodiment of the present application provides a heavy-duty automatic mechanical transmission cylinder durability test device, the heavy-duty automatic mechanical transmission cylinder durability test device comprising:

[0006] A load assembly comprising a horizontal load cylinder and a vertical load cylinder arranged perpendicular to each other, wherein the horizontal load cylinder is provided with a horizontal piston connecting rod with a groove on its surface for connecting to the test cylinder, and the vertical load cylinder is provided with a vertical piston connecting rod that abuts against the surface of the groove of the horizontal piston connecting rod;

[0007] a compression assembly comprising a compressed air tank for providing compressed air to the horizontal load cylinder, the vertical load cylinder, and the test cylinder;

[0008] When the test cylinder drives the horizontal piston connecting rod to move, the contact position between the vertical piston connecting rod and the horizontal piston connecting rod is changed, thereby changing the stroke of the vertical load cylinder, and then adjusting the holding force of the vertical piston connecting rod on the horizontal piston connecting rod.

[0009] In conjunction with the first aspect, in one embodiment,

[0010] The horizontal load cylinder is arranged toward the test cylinder, and one end of the horizontal piston connecting rod is connected to the piston in the horizontal load cylinder, and the other end is connected to the piston in the test cylinder;

[0011] The vertical load cylinder is arranged above the horizontal piston connecting rod, the vertical piston connecting rod is located at the lower end of the vertical load cylinder, and the front end of the vertical piston connecting rod is abutted against the surface where the groove on the horizontal piston connecting rod is located, and the rear end of the vertical piston connecting rod is connected to the piston in the vertical load cylinder.

[0012] In conjunction with the first aspect, in one embodiment,

[0013] The groove is located on the upper surface of the horizontal piston connecting rod, and the front end of the vertical piston connecting rod abuts against the upper end of the horizontal piston connecting rod;

[0014] The bottom surface of the groove is a horizontal surface with a certain width, and the corners between the bottom surface of the groove and the upper surface of the horizontal piston connecting rod are chamfered.

[0015] In conjunction with the first aspect, in one embodiment,

[0016] The horizontal load cylinder is arranged to face left, and the central axes of the test cylinder, the horizontal piston connecting rod and the horizontal load cylinder are located on the same horizontal line;

[0017] The vertical piston connecting rod and the horizontal piston connecting rod are perpendicular to each other, the lower end of the vertical piston connecting rod is abutted against the upper end of the horizontal piston connecting rod, and the upper end of the vertical piston connecting rod is connected to the piston in the vertical load cylinder.

[0018] In conjunction with the first aspect, in one embodiment,

[0019] A pressure reducing valve is provided on the air path between the compressed air tank and the horizontal load cylinder and the vertical load cylinder;

[0020] A solenoid valve is provided on the air path between the compressed air tank and the test cylinder;

[0021] The compressed air pressure provided by the compressed air tank to the horizontal load cylinder and the vertical load cylinder is lower than the compressed air pressure provided to the test cylinder.

[0022] In combination with the first aspect, in one embodiment, the heavy-duty automatic mechanical transmission cylinder durability testing device further includes a control circuit for controlling the opening and closing state of the solenoid valve, and a power supply for supplying power to the control circuit and the solenoid valve.

[0023] In a second aspect, the present application provides a heavy-duty automatic mechanical transmission cylinder durability test method, which is implemented based on the above-mentioned test device. The heavy-duty automatic mechanical transmission cylinder durability test method includes:

[0024] Adjust the contact position between the front end of the vertical piston connecting rod and the horizontal piston connecting rod so that the front end of the vertical piston connecting rod abuts against the bottom surface of the groove, and the compressed air drives the piston in the test cylinder to move and drive the horizontal piston connecting rod to move;

[0025] The front end of the vertical piston connecting rod moves on the bottom surface of the groove. At this time, the horizontal load cylinder and the vertical load cylinder provide the first process resistance to the test cylinder;

[0026] The front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod. At this time, the horizontal load cylinder and the vertical load cylinder provide a second process resistance to the test cylinder;

[0027] The front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod. At this time, the horizontal load cylinder and the vertical load cylinder provide a third process resistance to the test cylinder.

[0028] In conjunction with the second aspect, in one embodiment,

[0029] When the piston in the test cylinder moves and drives the horizontal piston connecting rod to move, the compression stroke of the horizontal load cylinder gradually increases;

[0030] When the front end of the vertical piston connecting rod moves on the bottom surface of the groove, the compression stroke of the vertical load cylinder remains unchanged;

[0031] When the front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder gradually increases;

[0032] When the front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder remains unchanged.

[0033] In conjunction with the second aspect, in one embodiment, the compressed air-driven movement of the piston in the test cylinder and the movement of the horizontal piston connecting rod specifically includes:

[0034] The compressed gas in the compressed air tank pushes the piston in the test cylinder to move, thereby driving the horizontal piston connecting rod to move, thereby changing the compression stroke of the horizontal load cylinder;

[0035] The movement of the horizontal piston connecting rod changes the contact position between the vertical piston connecting rod and the horizontal piston connecting rod, so that the front end of the vertical piston connecting rod moves on the bottom surface of the groove, moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, and moves on the surface of the horizontal piston connecting rod, thereby changing the compression stroke of the vertical load cylinder.

[0036] In a third aspect, the present application provides a heavy-duty automatic mechanical transmission cylinder durability test device, which includes a processor, a memory, and a heavy-duty automatic mechanical transmission cylinder durability test program stored on the memory and executable by the processor, wherein when the heavy-duty automatic mechanical transmission cylinder durability test program is executed by the processor, the steps of the above-mentioned heavy-duty automatic mechanical transmission cylinder durability test method are implemented.

[0037] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0038] By setting up a horizontal piston connecting rod and a vertical piston connecting rod and providing a groove on the surface of the horizontal piston connecting rod, when the test cylinder drives the horizontal piston connecting rod to move, the contact position of the vertical piston connecting rod and the horizontal piston connecting rod is changed, thereby changing the stroke of the vertical load cylinder, and then adjusting the resistance force of the vertical piston connecting rod on the horizontal piston connecting rod, so that when testing the test cylinder, forces with various load characteristics are generated on the test cylinder, thereby realizing effective simulation of the cylinder load characteristics of the real gearbox shifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the relationship between piston displacement, load and time in the existing solution;

[0040] Figure 2 This is the measured relationship diagram between displacement and time during the shifting process;

[0041] Figure 3The structural intention of the heavy-duty automatic mechanical transmission cylinder durability test device for this application;

[0042] Figure 4 This is a schematic diagram of the relationship between piston displacement, load and time in this application;

[0043] Figure 5 This is a flow chart of the heavy-duty automatic mechanical transmission cylinder durability test method applied in this application;

[0044] Figure 6 This is a schematic diagram of the hardware structure of the heavy-duty automatic mechanical transmission cylinder durability test equipment for this application. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 creative work are within the scope of protection of this application.

[0046] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0047] In a first aspect, an embodiment of the present application provides a heavy-duty automatic mechanical transmission cylinder durability testing device.

[0048] In one embodiment, referring to Figure 3 , Figure 3 This is a schematic diagram of the structure of the heavy-duty automatic mechanical transmission cylinder durability test device of this application. Figure 3 As shown, the heavy-duty automatic mechanical transmission cylinder durability test device includes a load component and a compression component.

[0049] As for the load assembly, the load assembly includes a horizontal load cylinder and a vertical load cylinder arranged perpendicular to each other. The horizontal load cylinder is provided with a horizontal piston connecting rod for connecting to the test cylinder and having a groove on the surface. The vertical load cylinder is provided with a vertical piston connecting rod that is supported on the surface where the groove of the horizontal piston connecting rod is located.

[0050] The compression assembly includes a compressed air tank for supplying compressed air to the horizontal load cylinder, vertical load cylinder, and test cylinder. When the test cylinder drives the horizontal piston connecting rod, it changes the contact position between the vertical piston connecting rod and the horizontal piston connecting rod, thereby changing the stroke of the vertical load cylinder and, in turn, adjusting the holding force of the vertical piston connecting rod on the horizontal piston connecting rod. It should be noted that the front end of the vertical piston connecting rod and the horizontal piston connecting rod are both smooth.

[0051] Specifically, the horizontal load cylinder is arranged toward the test cylinder, and one end of the horizontal piston connecting rod is connected to the piston in the horizontal load cylinder, and the other end is connected to the piston in the test cylinder; the vertical load cylinder is arranged above the horizontal piston connecting rod, and the vertical piston connecting rod is located at the lower end of the vertical load cylinder, and the front end of the vertical piston connecting rod is abutted against the surface of the groove on the horizontal piston connecting rod, and the rear end of the vertical piston connecting rod is connected to the piston in the vertical load cylinder.

[0052] Furthermore, a groove is located on the upper surface of the horizontal piston connecting rod, and the front end of the vertical piston connecting rod abuts against the upper end of the horizontal piston connecting rod. The bottom surface of the groove is a horizontal surface of a certain width, and the corner between the bottom surface of the groove and the upper surface of the horizontal piston connecting rod is rounded. The horizontal load cylinder is positioned to the left, and the central axes of the test cylinder, horizontal piston connecting rod, and horizontal load cylinder are co-located. The vertical piston connecting rod is perpendicular to the horizontal piston connecting rod, and the lower end of the vertical piston connecting rod abuts against the upper end of the horizontal piston connecting rod. The upper end of the vertical piston connecting rod is connected to the piston in the vertical load cylinder.

[0053] When the test cylinder drives the horizontal piston connecting rod to move to the right, the piston in the horizontal load cylinder is gradually compressed. At this time, the horizontal load cylinder will generate a gradually increasing horizontal force to the left on the test cylinder; as the horizontal piston connecting rod moves to the right, the vertical piston connecting rod slides on the bottom of the groove on the horizontal piston connecting rod. At this time, the compression stroke of the vertical load cylinder does not change, and the surfaces of the front end of the vertical piston connecting rod and the horizontal piston connecting rod are both smooth. It can be understood that the front end of the vertical piston connecting rod does not generate friction on the lateral movement of the horizontal piston connecting rod. When the compression stroke of the vertical load cylinder does not change, the force generated by the vertical load cylinder is perpendicular to the horizontal piston connecting rod. Therefore, for the test cylinder, when the vertical piston connecting rod slides on the bottom of the groove, the test cylinder is only subjected to the resistance generated by the horizontal load cylinder in the horizontal direction, and since the horizontal piston connecting rod can only move horizontally, the force generated by the vertical load cylinder perpendicular to the horizontal piston connecting rod does not affect the horizontal movement of the horizontal piston connecting rod. Therefore, at this time, it is the resistance generated by the horizontal load cylinder that hinders the movement of the horizontal piston connecting rod.

[0054] When the front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, since this part is designed with a chamfer, that is, the bottom surface of the groove and the surface of the horizontal piston connecting rod are designed to be inclined, therefore, when the front end of the vertical piston connecting rod moves from the bottom surface of the groove to between the bottom surface of the groove and the surface of the horizontal piston connecting rod, and then moves to the surface of the horizontal piston connecting rod, the vertical piston connecting rod will be gradually compressed, and the force of the vertical load cylinder will gradually increase at this time. The force generated by the vertical load cylinder at this time is perpendicular to the contact surface between the front end of the vertical piston connecting rod and the chamfer. For the horizontal piston connecting rod, in addition to the resistance generated by the horizontal load cylinder, it will also be subjected to a force toward the lower left, which will affect the horizontal rightward movement of the horizontal piston connecting rod. Therefore, for the test cylinder, the resistance generated by the horizontal load cylinder and the resistance generated by the vertical load cylinder at this time hinder the movement of the horizontal piston connecting rod.

[0055] When the front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder does not change, the force generated by the vertical load cylinder remains unchanged, and this force is perpendicular to the horizontal piston connecting rod. Similarly, the force generated by the vertical load cylinder perpendicular to the horizontal piston connecting rod does not affect the horizontal movement of the horizontal piston connecting rod. Therefore, for the test cylinder, it is the resistance generated by the horizontal load cylinder that hinders the movement of the horizontal piston connecting rod.

[0056] Furthermore, a pressure reducing valve is provided on the air path between the compressed air tank and the horizontal load cylinder and the vertical load cylinder; a solenoid valve is provided on the air path between the compressed air tank and the test cylinder; and the compressed air pressure provided by the compressed air tank to the horizontal load cylinder and the vertical load cylinder is lower than the compressed air pressure provided to the test cylinder. The heavy-duty automatic transmission cylinder durability test apparatus also includes a control circuit for controlling the opening and closing states of the solenoid valves, and a power supply for powering the control circuit and the solenoid valves.

[0057] This application processes a U-shaped groove on the horizontal piston connecting rod, and the U-shaped groove and the outer wall of the horizontal piston connecting rod are rounded. A vertical piston connecting rod is set perpendicular to the test piston connecting rod. The rounded corner of one end of the vertical piston connecting rod is placed on the rightmost side of the U-shaped groove, and the other end is connected to the piston of the vertical load cylinder. Several clamps are designed to fix all cylinders and piston connecting rods. After opening the solenoid valve corresponding to the test cylinder, compressed air pushes the test cylinder piston to the right. In the initial stage, the vertical piston connecting rod moves in the U-shaped groove. The test cylinder piston is only subject to the resistance of the horizontal load cylinder, which is load 1. When the vertical piston connecting rod moves to the end of the U-shaped groove, the U-shaped groove squeezes the vertical piston connecting rod and the vertical load cylinder, and squeezes the horizontal load cylinder, and is subject to the combined force of the two directions, which is load 2. When the vertical piston connecting rod moves outside the U-shaped groove, it is only subject to the resistance of the horizontal load cylinder, which is load 3. Therefore, the whole process will have a combination of three load characteristics, realizing an effective simulation of the cylinder load characteristics of the real gearbox shifting process.

[0058] The heavy-duty automatic transmission cylinder durability test device of the present application is composed of components such as a power supply, a control circuit, a wiring harness, a solenoid valve, a compressed air tank, an air pipe, a test cylinder, a horizontal piston connecting rod, a horizontal load cylinder, a vertical piston connecting rod, a vertical load cylinder, a pressure reducing valve, and an equipment fixture. The electrical control section is composed of the power supply, control circuit, wiring harness, and solenoid valve connected in sequence. The compressed air tank, solenoid valve, air pipe, and test cylinder are connected in sequence. The horizontal load cylinder and vertical load cylinder are both directly connected to the compressed air tank and the pressure reducing valve. The pressure reducing valve is used to reduce the load cylinder pressure to less than the test cylinder pressure. One end of the horizontal piston connecting rod is connected to the test cylinder piston, and the other end is connected to the horizontal load cylinder. The test cylinder, horizontal piston connecting rod, and horizontal load cylinder are arranged horizontally. A U-shaped groove is machined into the horizontal piston connecting rod. The U-shaped groove and the outer wall of the horizontal piston connecting rod are rounded. A vertical piston connecting rod is placed perpendicular to the horizontal piston connecting rod. One end of the vertical piston connecting rod is rounded and placed on the rightmost side of the U-shaped groove. The other end is connected to the piston of the vertical load cylinder. Several fixtures are designed to secure all cylinders and piston connecting rods. Turning on the power supply activates the control circuit, which automatically controls the solenoid valve to open and close. After the solenoid valve opens, compressed air pushes the test cylinder piston to the right. Initially, the vertical piston connecting rod moves within the U-shaped groove and experiences only resistance from the horizontal load cylinder, which is load 1. When the vertical piston connecting rod reaches the end of the U-shaped groove, the U-shaped groove squeezes the vertical piston connecting rod, the vertical load cylinder, and the horizontal load cylinder, resulting in a combined force from both directions, which is load 2. When the vertical piston connecting rod moves outside the U-shaped groove, it experiences only resistance from the horizontal load cylinder, which is load 3. The loads applied to the test cylinder during the entire movement process consist of load 1, load 2, and load 3, which simulates the cylinder load during the actual gearbox shifting process. The relationship between piston displacement, load, and time is shown in Figure 2. Figure 4 , realizing the Figure 2 Simulation of real curves.

[0059] Combine Figure 4 The test cylinder movement is divided into three stages. In the first stage, S0-S1, the test cylinder pushes the horizontal load cylinder to compress from a standstill. The test cylinder is subject to the resistance of the horizontal load cylinder + the friction force with the vertical piston connecting rod (small and negligible). The load force increases from 0 to a certain value (the minimum resistance that can push the horizontal load cylinder to compress). When the vertical piston connecting rod moves to the U-shaped groove step position, the step compresses the vertical load cylinder due to its leftward movement. At this time, in addition to the resistance of the horizontal load cylinder, the test cylinder is also subject to the leftward resistance perpendicular to the tangent of the step arc surface. The forces in the two directions form a combined force, resulting in a sudden change in force. This is the second stage, S1-S2. After the vertical piston connecting rod moves onto the step, the force applied by the vertical piston connecting rod to the horizontal piston connecting rod is a vertical downward pressure, that is, the only friction force applied to the horizontal direction is the friction force between the two (small and negligible). Therefore, in this stage, only the resistance applied by the horizontal load cylinder remains. Subsequently, the force remains unchanged. This is the third stage, S2-S3.

[0060] In a second aspect, an embodiment of the present application further provides a heavy-duty automatic mechanical transmission cylinder durability test method, which is implemented based on the above-mentioned heavy-duty automatic mechanical transmission cylinder durability test device.

[0061] In one embodiment, referring to Figure 5 , Figure 5 This is a flow chart of the heavy-duty automatic mechanical transmission cylinder durability test method. Figure 5 As shown in the figure, the heavy-duty automatic mechanical transmission cylinder durability test method includes:

[0062] S1: Adjust the contact position between the front end of the vertical piston connecting rod and the horizontal piston connecting rod so that the front end of the vertical piston connecting rod abuts against the bottom surface of the groove. The compressed air drives the piston in the test cylinder to move and drives the horizontal piston connecting rod to move.

[0063] S2: The front end of the vertical piston connecting rod moves on the bottom surface of the groove. At this time, the horizontal load cylinder and the vertical load cylinder provide the first process resistance to the test cylinder;

[0064] S3: The front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod. At this time, the horizontal load cylinder and the vertical load cylinder provide the second process resistance to the test cylinder;

[0065] S4: The front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod. At this time, the horizontal load cylinder and the vertical load cylinder provide a third process resistance to the test cylinder.

[0066] Furthermore, in one embodiment, when the movement of the piston in the test cylinder drives the movement of the horizontal piston connecting rod, the compression stroke of the horizontal load cylinder gradually increases;

[0067] When the front end of the vertical piston connecting rod moves on the bottom surface of the groove, the compression stroke of the vertical load cylinder remains unchanged;

[0068] When the front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder gradually increases;

[0069] When the front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder remains unchanged.

[0070] Furthermore, in one embodiment, the compressed air is used to drive the piston in the test cylinder to move and drive the horizontal piston connecting rod to move, specifically including:

[0071] S101: Using the compressed gas in the compressed air tank to push the piston in the test cylinder to move, thereby driving the horizontal piston connecting rod to move, thereby changing the compression stroke of the horizontal load cylinder;

[0072] S102: The movement of the horizontal piston connecting rod changes the contact position between the vertical piston connecting rod and the horizontal piston connecting rod, so that the front end of the vertical piston connecting rod moves on the bottom surface of the groove, moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, and moves on the surface of the horizontal piston connecting rod, thereby changing the compression stroke of the vertical load cylinder.

[0073] On the third aspect, an embodiment of the present application provides a heavy-duty automatic mechanical transmission cylinder durability test device, which can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0074] Reference Figure 6 , Figure 6 The hardware structure diagram of the heavy-duty automatic mechanical transmission cylinder durability test equipment involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the heavy-duty automatic mechanical transmission cylinder durability test equipment may include a processor, a memory, a communication interface, and a communication bus.

[0075] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0076] Communication interfaces include input / output (I / O), physical, and logical interfaces, which interconnect components within the heavy-duty automatic transmission cylinder durability test equipment. They also interconnect the heavy-duty automatic transmission cylinder durability test equipment with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0077] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0078] The processor may be a general-purpose processor that can call a heavy-duty automatic mechanical transmission cylinder durability test program stored in a memory and execute the heavy-duty automatic mechanical transmission cylinder durability test method provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the heavy-duty automatic mechanical transmission cylinder durability test program is called can be referred to in the various embodiments of the heavy-duty automatic mechanical transmission cylinder durability test method of the present application and will not be further described here.

[0079] Those skilled in the art will understand that Figure 6 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0080] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0081] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0082] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0083] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0084] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0085] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heavy-duty automatic mechanical transmission cylinder durability test device, characterized in that: The heavy-duty automatic mechanical transmission cylinder durability test device includes: A load assembly comprising a horizontal load cylinder and a vertical load cylinder arranged perpendicular to each other, wherein the horizontal load cylinder is provided with a horizontal piston connecting rod with a groove on its surface for connecting to the test cylinder, and the vertical load cylinder is provided with a vertical piston connecting rod that abuts against the surface of the groove of the horizontal piston connecting rod; a compression assembly comprising a compressed air tank for providing compressed air to the horizontal load cylinder, the vertical load cylinder, and the test cylinder; When the test cylinder drives the horizontal piston connecting rod to move, the contact position between the vertical piston connecting rod and the horizontal piston connecting rod is changed, thereby changing the stroke of the vertical load cylinder, and then adjusting the holding force of the vertical piston connecting rod on the horizontal piston connecting rod.

2. A heavy-duty automatic mechanical transmission cylinder durability test device according to claim 1, characterized in that: The horizontal load cylinder is arranged toward the test cylinder, and one end of the horizontal piston connecting rod is connected to the piston in the horizontal load cylinder, and the other end is connected to the piston in the test cylinder; The vertical load cylinder is arranged above the horizontal piston connecting rod, the vertical piston connecting rod is located at the lower end of the vertical load cylinder, and the front end of the vertical piston connecting rod is abutted against the surface where the groove on the horizontal piston connecting rod is located, and the rear end of the vertical piston connecting rod is connected to the piston in the vertical load cylinder.

3. A heavy-duty automatic mechanical transmission cylinder durability test device as claimed in claim 2, characterized in that: The groove is located on the upper surface of the horizontal piston connecting rod, and the front end of the vertical piston connecting rod abuts against the upper end of the horizontal piston connecting rod; The bottom surface of the groove is a horizontal surface with a certain width, and the corners between the bottom surface of the groove and the upper surface of the horizontal piston connecting rod are chamfered.

4. A heavy-duty automatic mechanical transmission cylinder durability test device as claimed in claim 3, characterized in that: The horizontal load cylinder is arranged to face left, and the central axes of the test cylinder, the horizontal piston connecting rod and the horizontal load cylinder are located on the same horizontal line; The vertical piston connecting rod and the horizontal piston connecting rod are perpendicular to each other, the lower end of the vertical piston connecting rod is abutted against the upper end of the horizontal piston connecting rod, and the upper end of the vertical piston connecting rod is connected to the piston in the vertical load cylinder.

5. A heavy-duty automatic mechanical transmission cylinder durability test device as claimed in claim 1, characterized in that: A pressure reducing valve is provided on the air path between the compressed air tank and the horizontal load cylinder and the vertical load cylinder; A solenoid valve is provided on the air path between the compressed air tank and the test cylinder; The compressed air pressure provided by the compressed air tank to the horizontal load cylinder and the vertical load cylinder is lower than the compressed air pressure provided to the test cylinder.

6. A heavy-duty automatic mechanical transmission cylinder durability test device as claimed in claim 5, characterized in that: The heavy-duty automatic mechanical transmission cylinder durability testing device further includes a control circuit for controlling the opening and closing state of the solenoid valve, and a power supply for supplying power to the control circuit and the solenoid valve.

7. A heavy-duty automatic mechanical transmission cylinder durability test method, implemented based on the test device according to any one of claims 1 to 6, characterized in that: The heavy-duty automatic mechanical transmission cylinder durability test method includes: Adjust the contact position between the front end of the vertical piston connecting rod and the horizontal piston connecting rod so that the front end of the vertical piston connecting rod abuts against the bottom surface of the groove, and the compressed air drives the piston in the test cylinder to move and drive the horizontal piston connecting rod to move; The front end of the vertical piston connecting rod moves on the bottom surface of the groove. At this time, the horizontal load cylinder and the vertical load cylinder provide the first process resistance to the test cylinder; The front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod. At this time, the horizontal load cylinder and the vertical load cylinder provide a second process resistance to the test cylinder; The front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod. At this time, the horizontal load cylinder and the vertical load cylinder provide a third process resistance to the test cylinder.

8. A heavy-duty automatic mechanical transmission cylinder durability test method according to claim 7, characterized in that: When the piston in the test cylinder moves and drives the horizontal piston connecting rod to move, the compression stroke of the horizontal load cylinder gradually increases; When the front end of the vertical piston connecting rod moves on the bottom surface of the groove, the compression stroke of the vertical load cylinder remains unchanged; When the front end of the vertical piston connecting rod moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder gradually increases; When the front end of the vertical piston connecting rod moves on the surface of the horizontal piston connecting rod, the compression stroke of the vertical load cylinder remains unchanged.

9. A heavy-duty automatic mechanical transmission cylinder durability test method as claimed in claim 8, characterized in that: The method of driving the piston in the test cylinder to move based on compressed air and driving the horizontal piston connecting rod to move specifically includes: The compressed gas in the compressed air tank pushes the piston in the test cylinder to move, thereby driving the horizontal piston connecting rod to move, thereby changing the compression stroke of the horizontal load cylinder; The movement of the horizontal piston connecting rod changes the contact position between the vertical piston connecting rod and the horizontal piston connecting rod, so that the front end of the vertical piston connecting rod moves on the bottom surface of the groove, moves between the bottom surface of the groove and the surface of the horizontal piston connecting rod, and moves on the surface of the horizontal piston connecting rod, thereby changing the compression stroke of the vertical load cylinder.

10. A heavy-duty automatic mechanical transmission cylinder durability test equipment, characterized in that: The heavy-duty automatic mechanical transmission cylinder durability test equipment includes a processor, a memory, and a heavy-duty automatic mechanical transmission cylinder durability test program stored on the memory and executable by the processor, wherein when the heavy-duty automatic mechanical transmission cylinder durability test program is executed by the processor, the steps of the heavy-duty automatic mechanical transmission cylinder durability test method as described in any one of claims 7 to 9 are implemented.

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