Endurance test device for tractor saddle

Abstract

The utility model provides an endurance test device for a tractor saddle, and the device is characterized in that a test operation area is enclosed by four vertical columns; the frame is detachably mounted in the test operation area; the frame is connected with a tractor saddle; the longitudinal actuator reaction frame and the supporting rod are oppositely arranged, the longitudinal actuator reaction frame is connected with the first side portion of the rigid connecting piece through a longitudinal actuator, and the supporting rod is connected with the second side portion of the rigid connecting piece through a connecting piece. The second vertical lifting control assembly and the lateral actuator reaction frame are oppositely arranged; the first vertical lifting control assembly is arranged between the second vertical lifting control assembly and the lateral actuator reaction frame; the first end of the rigid connecting piece is connected with the top end of the first vertical lifting control assembly, and the second end of the rigid connecting piece is connected with the lateral actuator reaction frame through the lateral actuator. The method can effectively restore the working condition of the tractor in a bench test, and improves the accuracy and reliability of the endurance test of the tractor saddle.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of saddle durability test, especially relates to a tractor saddle durability test device. BACKGROUND

[0002] With the rapid development of automobile transportation industry, the semi-trailer transportation becomes more and more important highway transportation mode. The semi-trailer transportation is convenient and has strong carrying capacity. The traction seat is an important part of the semi-trailer vehicle, which is a connecting device between the tractor and the trailer, mainly composed of a seat plate, a support and a locking mechanism. The semi-trailer bears vertical, longitudinal and lateral loads during driving, turning and braking, causing fatigue damage.

[0003] The prior art can only load force in a single direction, which cannot reproduce the actual stress state, and is prone to uneven force transmission and stress concentration, affecting the test results. Therefore, the existing test results cannot meet the requirements of saddle durability evaluation. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a tractor saddle durability test device, which utilizes the structural characteristics and connection relationship of the test device, and can effectively reproduce the actual vehicle working condition in the bench test, improving the accuracy and reliability of the tractor saddle durability test.

[0005] The device comprises four vertical columns, a first vertical lifting control assembly, a second vertical lifting control assembly, a longitudinal actuator counterforce frame, a lateral actuator counterforce frame and a support rod.

[0006] The four vertical columns enclose a test operation area; a vehicle frame is detachably installed in the test operation area; the vehicle frame is connected with a tractor saddle; a traction pin is connected to the middle position of the tractor saddle; and a rigid connecting piece is connected to the upper end of the traction pin.

[0007] The longitudinal actuator counterforce frame is arranged opposite to the support rod; the longitudinal actuator counterforce frame is connected to the first side of the rigid connecting piece through a longitudinal actuator; and the support rod is connected to the second side of the rigid connecting piece through a connecting piece.

[0008] The second vertical lifting control assembly and the lateral actuator counterforce frame are arranged opposite to each other and on the other side of the test operation area.

[0009] The first vertical lifting control assembly is arranged between the second vertical lifting control assembly and the lateral actuator counterforce frame; and the first vertical lifting control assembly, the second vertical lifting control assembly and the lateral actuator counterforce frame are arranged in a straight line.

[0010] The first end of the rigid connecting piece is connected to the top end of the first vertical lifting control assembly; and the second end of the rigid connecting piece is connected to the lateral actuator counterforce frame through a lateral actuator.

[0011] Further need explanation, the first vertical lifting control assembly is provided with right vertical actuator, the top end of right vertical actuator is connected with the first end of rigid connecting piece through first ball hinge;

[0012] The bottom end of right vertical actuator is fixed to bottom support platform through first connecting plate.

[0013] Further need explanation, the second vertical lifting control assembly is provided with left vertical actuator, the top end of left vertical actuator is connected with the second end of rigid connecting piece through second ball hinge;

[0014] The bottom end of left vertical actuator is fixed to bottom support platform through second connecting plate.

[0015] Further need explanation, the bottom end of column is fixed on bottom support platform, the frame connecting plate is arranged near the top end position of column, a plurality of connecting holes are formed in frame connecting plate, and the frame is connected with connecting hole through bolt.

[0016] Further need explanation, the first end of longitudinal actuator is hinged with longitudinal actuator counterforce frame through longitudinal actuator connecting plate, and the second end of longitudinal actuator is connected with the first side of rigid connecting piece through pin shaft and pin hole.

[0017] Further need explanation, the side actuator is hinged with side actuator counterforce frame through side actuator connecting plate.

[0018] Further need explanation, the bottom end of side actuator counterforce frame is fixed to bottom support platform.

[0019] Further need explanation, the bottom end of support rod is fixed to bottom support platform through support bottom plate.

[0020] The two ends of support rod adopt ball hinge structure and are connected to support bottom plate and connecting piece correspondingly.

[0021] Further need explanation, the connecting piece adopts I-beam or H-shaped steel.

[0022] From the above technical scheme, the utility model has the following advantages:

[0023] The durability test device for the towing vehicle saddle can load the towing vehicle saddle from multiple directions of longitudinal direction, vertical direction and lateral direction. The longitudinal actuator can simulate the longitudinal force in the acceleration and deceleration process of the vehicle driving; the vertical lifting control assembly can simulate the vertical impact of the saddle when the vehicle passes through the bumpy road, uphill and downhill and the like; and the lateral actuator can simulate the lateral force under the working conditions of the vehicle turning and leaning. The multi-direction simulation can highly restore the complex stress conditions of the towing vehicle saddle in the actual driving, so that the test result is closer to the real situation in the actual use, and more accurate data are provided for the durability evaluation of the saddle.

[0024] The device forms a test operation area by four columns, and the structure provides a stable support frame for the whole test device. In the test process, the components work coordinately in the stable frame, so that the overall stability of the test device is ensured when the saddle is loaded in multiple directions, and the test error caused by the shaking or deformation of the device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 It is a schematic view of the durability test device for the towing vehicle saddle.

[0027] The reference signs are as follows: 1-column, 2-longitudinal actuator, 3-frame connecting plate, 4-longitudinal actuator counterforce frame, 5-left vertical actuator, 6-right vertical actuator, 7-first spherical hinge, 8-supporting rod, 9-frame, 10-connector, 11-rigid connector, 12-lateral actuator, 13-lateral actuator counterforce frame, 14-towing vehicle saddle, 15-lateral actuator connecting plate, 16-first connecting plate, 17-longitudinal actuator connection. DETAILED DESCRIPTION

[0028] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical scheme of the present application will be described clearly and completely in combination with the drawings in the specific embodiments. Obviously, the following described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present patent, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present patent.

[0029] As Figure 1As shown, the utility model provides a tractor saddle endurance test device, include: four columns 1, first vertical lifting control component, second vertical lifting control component, longitudinal actuator counterforce frame 4, lateral actuator counterforce frame 13 and support pole 8.

[0030] Four columns 1 enclose test operation area, and four columns 1 enclosed test operation area is mouth-shaped optionally.

[0031] The bottom end of the column 1 of the embodiment is fixed on the bottom support platform, which can be made of a steel plate. The bottom end of the column 1 is fixed to the bottom support platform by welding. Of course, it can also be fixed to the bottom support platform by bolt connection.

[0032] A frame connecting plate 3 is arranged near the top end of the column 1. A plurality of connecting holes are formed in the frame connecting plate 3. The frame 9 is connected to the connecting holes by bolts. This facilitates the disassembly and assembly of the frame. That is, the frame 9 can be detachably installed in the test operation area and can be connected to the frame connecting plate 3 of the column 1 by bolts and connecting holes.

[0033] The frame 9 of the embodiment is connected to a tractor saddle 14. The lower end of the draw pin is connected to the middle position of the tractor saddle. The upper end of the draw pin is connected to a rigid connecting piece 11.

[0034] The first vertical lifting control component, the second vertical lifting control component, the longitudinal actuator counterforce frame 4, the lateral actuator counterforce frame 13, and the support pole 8 of the embodiment are arranged around the test operation area.

[0035] The longitudinal actuator counterforce frame 4 is arranged opposite to the support pole 8. The bottom end of the longitudinal actuator counterforce frame 4 is fixedly connected to the bottom support platform. The bottom end of the support pole 8 is fixed to the bottom support platform by a support bottom plate. The two ends of the support pole 8 adopt a spherical hinge structure and are connected to the support bottom plate and the connecting piece 10. The spherical hinge structure allows the two ends of the support pole 8 to rotate by a certain angle, meeting the requirements of the test.

[0036] The position near the top end of the longitudinal actuator counterforce frame 4 is connected to the first side of the rigid connecting piece 11 by the longitudinal actuator 2. The support pole 8 is connected to the second side of the rigid connecting piece 11 by the connecting piece 10. The connecting piece 10 can be an I-beam or an H-shaped steel.

[0037] It should be noted that the first end of the longitudinal actuator 2 is hinged to the longitudinal actuator counterforce frame 4 by a longitudinal actuator connecting plate 17. The second end of the longitudinal actuator 2 is connected to the first side of the rigid connecting piece 11 by a pin shaft and a pin hole.

[0038] The second vertical lifting control assembly of the embodiment is arranged opposite to the lateral actuator counterforce frame 13 and is arranged at the other side of the test operation area; the first vertical lifting control assembly is arranged between the second vertical lifting control assembly and the lateral actuator counterforce frame 13, and the first vertical lifting control assembly, the second vertical lifting control assembly and the lateral actuator counterforce frame 13 are arranged in a line.

[0039] It should be noted that the first vertical lifting control assembly is provided with the right vertical actuator 6; the top end of the right vertical actuator 6 is connected with the first end of the rigid connecting piece 11 through the first spherical hinge 7; the bottom end of the right vertical actuator 6 is fixed to the bottom support platform through the first connecting plate 16. The first connecting plate 16 can be fixedly connected with the bottom support platform by welding.

[0040] The second vertical lifting control assembly of the embodiment is provided with the left vertical actuator 5; the top end of the left vertical actuator 5 is connected with the second end of the rigid connecting piece 11 through the second spherical hinge; the bottom end of the left vertical actuator 5 is fixed to the bottom support platform through the second connecting plate. The second connecting plate can be fixedly connected with the bottom support platform by welding.

[0041] As shown in FIG. 1, the first vertical lifting control assembly is provided with the right vertical actuator 6 and the left vertical actuator 5. Figure 1 As can be seen, the first end of the rigid connecting piece 11 is connected with the top end of the first vertical lifting control assembly, and the second end of the rigid connecting piece 11 is connected with the lateral actuator counterforce frame 13 through the lateral actuator 12. The lateral actuator 12 is hinged with the lateral actuator counterforce frame 13 through the lateral actuator connecting plate 15. The bottom end of the lateral actuator counterforce frame 13 is fixed to the bottom support platform.

[0042] For the implementation mode of the embodiment, the vehicle frame 9 is detachably installed in the test operation area formed by the four upright columns 1, the test operation area of the embodiment is a mouth-shaped area, and the installation of the towing vehicle saddle 14 on the vehicle frame 9 is ensured to be correct, and the lower end of the towing pin is clamped in the middle position of the towing vehicle saddle, and the upper end of the towing pin is connected with the rigid connecting piece 11.

[0043] The positions of the longitudinal actuator counterforce frame 4 and the support rod 8 are adjusted, so that the longitudinal actuator counterforce frame 4 is connected with the first side of the rigid connecting piece 11 through the longitudinal actuator 2, and the support rod 8 is connected with the second side of the rigid connecting piece 11 through the connecting piece 10, thereby forming a stable connection structure in the longitudinal direction to simulate the longitudinal stress condition of the towing vehicle in the driving process.

[0044] Then, the second vertical lifting control assembly and the lateral actuator counterforce frame 13 are arranged on the other side of the test operation area, and the first vertical lifting control assembly is placed between the second vertical lifting control assembly and the lateral actuator counterforce frame 13, ensuring that the three are arranged in line. The first end of the rigid connecting piece 11 is connected with the top end of the first vertical lifting control assembly, and the second end of the rigid connecting piece 11 is connected with the lateral actuator counterforce frame 13 through the lateral actuator 12, so that the corresponding loading mechanism is also constructed in the vertical and lateral directions.

[0045] Finally, the actuators and lifting control assemblies are started, and longitudinal, vertical and lateral forces and displacements are respectively applied to the rigid connecting piece 11 according to the predetermined test program and loading spectrum, so as to simulate various working conditions of the tractor saddle in actual use and perform durability test.

[0046] The tractor saddle durability test device of the embodiment can accurately simulate various complex forces and displacements that the tractor saddle is subjected to in actual road driving, including acceleration, braking, turning, bumping and other working conditions, so that the test results can better reflect the durability performance of the saddle in actual use, and the test authenticity and reliability are improved.

[0047] The test operation area surrounded by the four columns and the relative position of the components make the whole test device compact and stable, facilitating installation and operation, ensuring the uniformity and coordination of the forces between the components during the test, and reducing test errors. The detachable design of the frame facilitates the test of different models or specifications of tractor saddles, improves the versatility and flexibility of the test device, and can meet the durability test requirements of various types of saddles.

[0048] In combination with the above tractor saddle durability test device, the core target is to simulate the stress state of the tractor saddle in actual operation. The longitudinal actuator 2 applies longitudinal tension or pressure to the rigid connecting piece 11 to simulate the stress conditions of the tractor during acceleration, deceleration and uniform speed driving in the driving process. The first vertical lifting control assembly and the second vertical lifting control assembly work together to apply vertical force and displacement to the rigid connecting piece 11 to simulate the vertical impact and vibration of the saddle when the vehicle passes through the bumping road, uphill and downhill, etc. The lateral actuator 12 cooperates with the lateral actuator counterforce frame 13 to apply lateral force to the rigid connecting piece 11 to simulate the lateral stress of the saddle under the working conditions of vehicle turning and side leaning.

[0049] During the test, each actuator and control component is accurately controlled and loaded according to the preset program and parameters, and the trailer saddle is continuously loaded in a cycle to detect the durability of the trailer saddle under long-time and complex working conditions, such as the generation of fatigue cracks, the wear of parts, the loosening of connecting parts, and the like, so as to optimize the design of the trailer saddle and verify the reliability.

[0050] The following gives an extended implementation mode of the durability test device of the trailer saddle, and the specific mode includes:

[0051] Step one: first, install the trailer saddle with strain gauges in the corresponding position of the actual vehicle, collect the original strain signals of the trailer saddle in the actual driving process by using the strain gauges through the whole vehicle road test, and the original strain signals reflect the stress condition of the saddle under the real working condition. Then, the collected original signals are preprocessed, such as noise removal and abnormal value correction, so as to obtain the target response signals that can be used as a reference for subsequent bench test.

[0052] Step two: install the trailer saddle on the test bench surrounded by four columns 1 in the shape of a mouth, and the vehicle frame 9 is fixed in the working area in a detachable manner, and the trailer saddle 14 is correctly connected with the traction pin, the rigid connecting piece 11 and other components, that is, the lower end of the traction pin is clamped in the middle position of the trailer saddle, the upper end of the traction pin is connected with the rigid connecting piece 11, the longitudinal actuator counterforce frame 4 is connected with the first side of the rigid connecting piece 11 through the longitudinal actuator 2, the support rod 8 is connected with the second side of the rigid connecting piece 11 through the connecting piece 10, the second vertical lifting control assembly and the lateral actuator counterforce frame 13 are oppositely arranged in the other side of the test working area, the first vertical lifting control assembly is arranged between the second vertical lifting control assembly and the lateral actuator counterforce frame 13 and collinear with them, the first end of the rigid connecting piece 11 is connected with the top end of the first vertical lifting control assembly, and the second end of the rigid connecting piece 11 is connected with the lateral actuator counterforce frame 13 through the lateral actuator 12. White noise is used as the initial driving signal, all actuators such as the longitudinal actuator 2, the first vertical lifting control assembly, the second vertical lifting control assembly and the lateral actuator 12 are used to load the saddle, so as to obtain the response signal of the saddle on the test bench, the transfer function of the trailer saddle bench test and the inverse function of the transfer function are obtained according to the initial driving signal and the response signal by using the signal processing algorithm, and the initial driving signal for the bench test is obtained by calculation according to the inverse of the transfer function and the target response signal.

[0053] Step three: control the actuators to load the saddle of the tractor with the initial driving signal, and obtain the response signal of the saddle on the test bench again, and calculate the error between the response signal and the target response signal obtained by the pre-processing, and determine whether the error is within the allowable range. If the error is within the allowable range, go to step five; if the error exceeds the allowable range, go to step four.

[0054] Step four: according to the calculated error, modify the driving signal by increasing or reducing, and then return to step two, and control the actuators to load the saddle again with the modified driving signal and collect the response signal, and repeat the above error determination process until the error is within the allowable range.

[0055] Step five: calculate the error between the response signal obtained after multiple adjustments and the target response signal again, and determine whether the error meets the requirements. If the error meets the requirements, save the driving signal as the final driving signal, which can be used to accurately control the actuators to load the saddle of the tractor in subsequent tests, thereby highly simulating the stress condition of the real vehicle on the test bench and achieving accurate testing of the durability of the saddle of the tractor.

[0056] Through the tractor saddle durability test device, the structural characteristics and the connection relationship of each component of the test device are utilized to effectively reproduce the real vehicle working condition in the test bench test, improve the accuracy and reliability of the tractor saddle durability test, and provide strong support for the design optimization and quality evaluation of the saddle.

[0057] It should be understood that when it is said that a certain element or layer is "on", "connected" or "coupled" to another element or layer, it can be directly on, connected or coupled to the other element or layer, or there can be an intermediate element or layer. Conversely, when it is said that a certain element is "directly on", "directly connected" or "directly coupled" to another element or layer, there is no intermediate element or layer. Similar numbers in all the drawings indicate similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0058] Spatially relative terms, such as "under", "below", "lower", "over", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is inverted, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of over and under. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0059] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0060] The above description of disclosed embodiments provides enough information to enable those skilled in the art to make or use the present document. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present document. Thus, the present document is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A durability testing device for a tractor saddle, characterized in that, The device comprises: four vertical columns (1), a first vertical lifting control assembly, a second vertical lifting control assembly, a longitudinal actuator counterforce frame (4), a lateral actuator counterforce frame (13) and a support rod (8); the four vertical columns (1) enclose a test operation area; a vehicle frame (9) is detachably mounted in the test operation area; the vehicle frame (9) is connected with a tractor saddle (14), a traction pin is connected at the middle position of the tractor saddle, and the upper end of the traction pin is connected with a rigid connecting piece (11); the longitudinal actuator counterforce frame (4) is arranged opposite to the support rod (8), the longitudinal actuator counterforce frame (4) is connected with the first side of the rigid connecting piece (11) through a longitudinal actuator (2), and the support rod (8) is connected with the second side of the rigid connecting piece (11) through a connecting piece (10); the second vertical lifting control assembly and the lateral actuator counterforce frame (13) are arranged opposite to each other and on the other side of the test operation area; the first vertical lifting control assembly is arranged between the second vertical lifting control assembly and the lateral actuator counterforce frame (13), and the first vertical lifting control assembly, the second vertical lifting control assembly and the lateral actuator counterforce frame (13) are arranged in a same line; the first end of the rigid connecting piece (11) is connected with the top end of the first vertical lifting control assembly, and the second end of the rigid connecting piece (11) is connected with the lateral actuator counterforce frame (13) through a lateral actuator (12).

2. The tractor saddle endurance test device according to claim 1, wherein the first vertical lifting control assembly is provided with a right vertical actuator (6); the top end of the right vertical actuator (6) is connected with the first end of the rigid connecting piece (11) through a first spherical hinge (7); and the bottom end of the right vertical actuator (6) is fixed to a bottom support platform through a first connecting plate (16).

3. The tractor saddle endurance test device according to claim 1, wherein the second vertical lifting control assembly is provided with a left vertical actuator (5); the top end of the left vertical actuator (5) is connected with the second end of the rigid connecting piece (11) through a second spherical hinge; and the bottom end of the left vertical actuator (5) is fixed to the bottom support platform through a second connecting plate.

4. The tractor saddle endurance test device according to claim 1, wherein the bottom end of the vertical column (1) is fixed to the bottom support platform, a vehicle frame connecting plate (3) is arranged near the top end of the vertical column (1), a plurality of connecting holes are formed in the vehicle frame connecting plate (3), and the vehicle frame (9) is connected with the connecting holes through bolts.

5. The tractor saddle endurance test device according to claim 1, wherein the first end of the longitudinal actuator (2) is hinged to the longitudinal actuator counterforce frame (4) through a longitudinal actuator connecting plate (17); and the second end of the longitudinal actuator (2) is connected with the first side of the rigid connecting piece (11) through a pin shaft and a pin hole.

6. The tractor saddle endurance test device according to claim 1, wherein the lateral actuator (12) is hinged to the lateral actuator counterforce frame (13) through a lateral actuator connecting plate (15).

7. The tractor saddle endurance test device according to claim 1, wherein ​ ​ The bottom end of the lateral actuator counterforce frame (13) is fixed to the bottom support platform.

8. The tractor saddle durability test device according to claim 1, characterized in that, The bottom end of the support rod (8) is fixed to the bottom support platform through a support bottom plate.

9. The tractor saddle durability test device according to claim 8, characterized in that, The two ends of the support rod (8) are connected to the support bottom plate and the connecting member (10) through a spherical hinge structure.

10. The tractor saddle durability test device according to claim 8, characterized in that, The connecting member (10) is an I-beam or an H-shaped steel.

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