An electric control hydraulic clutch actuator fatigue test device

Abstract

The utility model discloses a kind of electric control hydraulic clutch actuator fatigue test device, including bottom plate, still including oil passage support seat installed on bottom plate, opposite two end surfaces of oil passage support seat are respectively electrohydraulic actuator mounting surface and hydraulic separation bearing mounting surface;Oil passage is further provided in oil passage support seat, the oil passage is set through oil passage support seat, oil passage is worn out electrohydraulic actuator mounting surface as oil inlet hole, and one end of hydraulic separation bearing mounting surface is worn out as oil outlet hole;Hydraulic separation bearing mounting surface of oil passage support seat is further provided with installation unit, and installation unit is used to install the hydraulic separation bearing to be measured. The electric control hydraulic clutch actuator fatigue test device provided by the utility model is by respectively installing electrohydraulic actuator and hydraulic separation bearing in the two sides of oil passage support seat, electrohydraulic actuator and hydraulic separation bearing are connected by the oil passage set in oil passage support seat, suitable for carrying out electrohydraulic system (EHA+CSC) endurance and vibration test.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, specifically to a fatigue testing device for an electronically controlled hydraulic clutch actuator. Background Technology

[0002] In recent years, an increasing number of commercial vehicles have begun to use AMT (Automatic Mechanical Transmission) gearboxes, and the adoption of AMT in medium and light commercial vehicles has also accelerated rapidly, yielding positive market feedback. Currently, most domestic light commercial vehicle AMT systems utilize pneumatic technology, with fewer electro-hydraulic AMT products available. However, with the development of a series of electro-hydraulic AMT products, these will become competitive offerings in the market.

[0003] The clutch control of the electro-hydraulic AMT adopts an electro-hydraulic actuator (EHA) and a central hydraulic release bearing (CSC) scheme, which features precise response, small size, and no redundant wireless connections. Hardware testing of the EHA+CSC electro-hydraulic transmission system is an essential and crucial step.

[0004] During the development cycle, fatigue testing of the product is crucial. There are three obvious problems with high and low temperature durability and vibration testing for EHA+CSC.

[0005] Question 1: There is no dedicated single-unit testing device for high and low temperature durability testing of electro-hydraulic systems (EHA+CSC). The entire gearbox needs to be installed in a high and low temperature chamber for testing, which takes up a large area and wastes testing resources.

[0006] Question 2: There is no dedicated unit testing device for vibration testing of electro-hydraulic systems (EHA+CSC). Placing the entire unit on the vibration table results in excessive weight, which the vibration table cannot handle, leading to frequent test interruptions.

[0007] Problem 3: The test device design is unreasonable. During the vibration process, the test device is disintegrated or the tooling itself reduces the vibration of the test sample, affecting the test progress and result judgment. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a fatigue testing device for electro-hydraulic clutch actuators, thereby solving the problem of low testing efficiency caused by the lack of a dedicated testing device for electro-hydraulic systems (EHA+CSC) in existing technologies.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a fatigue testing device for an electro-hydraulic clutch actuator, including a base plate and an oil passage support seat mounted on the base plate, wherein the two opposite ends of the oil passage support seat are the electro-hydraulic actuator mounting surface and the hydraulic release bearing mounting surface, respectively.

[0010] The oil passage support is also provided with an oil passage, which runs through the oil passage support. The end of the oil passage that passes through the mounting surface of the electro-hydraulic actuator is the oil inlet, and the end that passes through the mounting surface of the hydraulic release bearing is the oil outlet.

[0011] An installation unit is also installed on the hydraulic release bearing mounting surface of the oil passage support seat. The installation unit is used to install the hydraulic release bearing to be tested.

[0012] This utility model also has the following technical features:

[0013] The installation unit includes an installation shaft mounted on the hydraulic release bearing mounting surface of the oil passage support seat. A first spring baffle and a second spring baffle are also sleeved on the installation shaft. The first spring baffle is located on the side of the installation shaft near the oil passage support seat.

[0014] A spring is also installed between the first spring baffle and the second spring baffle. The first spring baffle is movable on the mounting shaft, and the position of the second spring baffle is fixed.

[0015] The top of the oil passage support is also equipped with a control unit (TCU).

[0016] Compared with the prior art, this utility model has the following technical effects:

[0017] (I) The fatigue testing device for the electro-hydraulic clutch actuator provided by this utility model is suitable for conducting durability and vibration tests of electro-hydraulic systems (EHA+CSC) by installing an electro-hydraulic actuator and a hydraulic release bearing on both sides of the oil passage support seat and connecting the electro-hydraulic actuator and the hydraulic release bearing through an oil passage set in the oil passage support seat.

[0018] (II) The fatigue testing device for the electro-hydraulic clutch actuator provided by this utility model ensures smooth separation and engagement of the oil passage support and the mounting shaft.

[0019] (III) The fatigue testing device for the electro-hydraulic clutch actuator provided by this utility model uses a spring to simulate the real load when the gearbox is disengaged and engaged, making the test closer to the real situation.

[0020] (IV) The fatigue testing device for the electro-hydraulic clutch actuator provided by this utility model can install a controller above the oil passage support seat to avoid inconsistent amplitude during vibration testing and improve the random vibration test caused by unreasonable tooling.

[0021] (V) The fatigue testing device for the electro-hydraulic clutch actuator provided by this utility model has a simple structure, is easy to operate, safe and reliable, and highly adaptable. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the usage state of this utility model.

[0024] The meanings of the labels in the attached diagram are as follows:

[0025] 1-Base plate, 2-Oil passage support seat, 3-Oil passage, 4-Mounting unit, 5-Control unit TCU, 6-Electro-hydraulic actuator, 7-Central hydraulic release bearing.

[0026] 4-1-Mounting shaft, 4-2-First spring baffle, 4-3-Second spring baffle, 4-4-Spring.

[0027] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0028] Unless otherwise specified, all components in this invention are made from components known in the prior art.

[0029] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0030] Example 1:

[0031] This embodiment provides a fatigue testing device for an electro-hydraulic clutch actuator, such as... Figures 1-2 As shown, it includes a base plate 1 and an oil passage support 2 mounted on the base plate 1. The two opposite ends of the oil passage support 2 are the mounting surface of the electro-hydraulic actuator and the mounting surface of the hydraulic release bearing, respectively.

[0032] The oil passage support 2 is further provided with an oil passage 3. The oil passage 3 is provided through the oil passage support 2. The end of the oil passage 3 that extends out of the mounting surface of the electro-hydraulic actuator is the oil inlet, and the end that extends out of the mounting surface of the hydraulic release bearing is the oil outlet.

[0033] An installation unit 4 is also installed on the hydraulic release bearing mounting surface of the oil passage support 2. The installation unit 4 is used to install the central hydraulic release bearing 7.

[0034] First, install the oil outlet of the electro-hydraulic actuator 6 onto the side oil inlet of the electro-hydraulic actuator mounting surface of the oil passage support 2, and fix it with screws.

[0035] Then, the oil outlet of the hydraulic release bearing mounting surface at the front end of the oil passage support 2 is installed with the oil inlet of the central hydraulic release bearing 7 and fixed with screws.

[0036] Next, the oil passage support 2 is installed on the base plate 1, and the central hydraulic release bearing 7 is passed through the mounting shaft 4-1. The first spring baffle 4-2 is passed through the mounting shaft 4-1 and contacts the central hydraulic release bearing 7. Then, the spring 4-4 ​​and the second spring baffle 4-3 are installed in sequence. The second spring baffle 4-3 is fixed to one end of the mounting shaft 4-1 by bolts.

[0037] Finally, connect the electro-hydraulic actuator 6 and the control unit TCU5 connector, and power on to conduct a clutch disengagement and engagement fatigue test.

[0038] As a preferred embodiment:

[0039] The mounting unit 4 includes a mounting shaft 4-1 mounted on the hydraulic release bearing mounting surface of the oil passage support seat 2. A first spring baffle 4-2 and a second spring baffle 4-3 are also sleeved on the mounting shaft 4-1. The first spring baffle 4-2 is located on the side of the mounting shaft 4-1 near the oil passage support seat 2.

[0040] A spring 4-4 ​​is also installed between the first spring baffle 4-2 and the second spring baffle 4-3. The first spring baffle 4-2 can move on the mounting shaft 4-1, and the position of the second spring baffle 4-3 is fixed.

[0041] As a preferred embodiment:

[0042] The top of the oil passage support 2 is also equipped with a control unit TCU5.

[0043] The specific working process of this utility model:

[0044] S1. The usage state of this utility model is as follows: Figure 2 As shown. Specifically:

[0045] Step 101: Fix the mounting shaft 4-1 onto the oil passage support 2 and secure it to the oil passage support 2 with screws.

[0046] Step 102: Fix the oil passage support 2 to the base plate 1 with bolts, that is, fix it from below with fixing bolts; connect the oil inlet on the left side of the oil passage to the EHA oil inlet with threads, and install the EHA onto the oil passage support 2 with 4 fixing bolts.

[0047] Step 103: Fit the CSC onto the mounting shaft 4-1 and secure it to the front end of the oil passage support 2 with 4 screws. Thread the oil pipe to the oil passage outlet and thread the oil pipe to the CSC inlet.

[0048] Step 104: Connect the first spring baffle 4-2 and the spring 4-4 ​​to the front end of the mounting shaft 4-1, and install the second spring baffle 4-3 and the tightening bolt at the front end.

[0049] Step 105: Install the control unit TCU5 onto the fixing screws on the upper side of the test device.

[0050] Step 106: Fix the base 1 to the flat test platform with bolts.

[0051] S2. Fatigue test method for electro-hydraulic clutch actuators. Specifically:

[0052] Step 201: After EHA is filled with oil and vented, the internal displacement of EHA stops at 0mm. At this time, the internal oil pressure of the hydraulic system is 2-3 bar, and the clutch system is in the normally engaged state. At this time, a motor forward rotation command is issued. The motor rotates, driving the piston at the front end of the ball screw to make linear motion, thereby controlling the piston to move in the separation direction. High-pressure hydraulic oil is forced into oil passage 3 and transmitted to the CSC through the oil pipe. At this time, the EHA piston reaches the 20mm position, and the hydraulic oil pressure can reach more than 20 bar. The pressure of the CSC front end on the clutch system baffle is sufficient to ensure normal separation.

[0053] Step 202: Determine the displacement of the displacement sensor inside the EHA. If the displacement is within the range of 20±2mm, and the displacement of the separation baffle at the front end of the CSC pusher is within the range of 10±1mm, then the separation is considered complete, and proceed to the next step. If the displacement range exceeds the tolerance, the test is immediately terminated, and the failure count is incremented by 1 and output to the display.

[0054] Step 203: After the separation displacement is reasonable, a motor reversal command is issued. The motor rotates, driving the piston at the front end of the ball screw inside the EHA to move linearly, that is, in the opposite direction, thereby returning the high-pressure oil of the CSC and reducing the oil pressure inside the CSC to 2-3 bar.

[0055] Step 204: Determine the bonding displacement. If the displacement of the internal displacement sensor of EHA is within the range of 0±2mm, it is considered to be in the bonding position. The bonding count is incremented by 1, and the next step is performed. If the displacement range is out of tolerance, the test is terminated immediately, the failure count is incremented by 1, and the result is output to the display.

[0056] Step 205: Repeat the experiment until the number of separations and re-bindings meets the experimental requirements.

[0057] The above technical solutions are only preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art without creative effort within the technical scope disclosed in this utility model are covered within the protection scope of this utility model.

Claims

1. An electrically controlled hydraulic clutch actuator fatigue test device comprising a base plate (1), characterized in that, It also includes an oil passage support seat (2) installed on the base plate (1), wherein the two opposite ends of the oil passage support seat (2) are the electro-hydraulic actuator mounting surface and the hydraulic release bearing mounting surface, respectively; The oil passage support (2) is also provided with an oil passage (3). The oil passage (3) is provided through the oil passage support (2). The oil passage (3) extends out of the electro-hydraulic actuator mounting surface as an oil inlet and extends out of the hydraulic release bearing mounting surface as an oil outlet. The hydraulic release bearing mounting surface of the oil passage support (2) is also equipped with a mounting unit (4), which is used to install the hydraulic release bearing to be tested.

2. The fatigue testing device for the electro-hydraulic clutch actuator as described in claim 1, characterized in that, The mounting unit (4) includes a mounting shaft (4-1) mounted on the hydraulic release bearing mounting surface of the oil passage support seat (2). A first spring baffle (4-2) and a second spring baffle (4-3) are also sleeved on the mounting shaft (4-1). The first spring baffle (4-2) is located on the side of the mounting shaft (4-1) close to the oil passage support seat (2). A spring (4-4) is also installed between the first spring baffle (4-2) and the second spring baffle (4-3). The first spring baffle (4-2) is movable on the mounting shaft (4-1), and the position of the second spring baffle (4-3) is fixed.

Images