Axle load loading device and heavy chassis dynamometer

Abstract

The utility model discloses an axle load loading device and a heavy chassis dynamometer, the axle load loading device comprises a chassis and a top cover located above the chassis, a rotatable left hub and a rotatable right hub are erected on the chassis, a bottom plate is fixedly connected below the middle of the chassis, a hydraulic oil cylinder is connected above the bottom plate, and the hydraulic oil cylinder is connected above the chassis. The output end of the hydraulic oil cylinder is connected with a connecting block, a plurality of hanging rings are connected to the upper portion of the connecting block, and the hydraulic oil cylinder, the connecting block and the hanging rings are located between the left hub and the right hub. A hydraulic station is fixedly connected to one side of the bottom frame and connected with the hydraulic oil cylinder through an oil pipe. According to the utility model, a hydraulic loading mode is adopted, the force applied by the hydraulic oil cylinder can be accurately regulated and controlled, the force directly acts on a drive axle of a tested vehicle, inertia matching between the tested vehicle and a hub can be more accurately and efficiently realized, the phenomenon of slipping of a drive wheel can be effectively avoided, and the accuracy of test data and the safety of a test process are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vehicle testing equipment especially a shaft load loading device and heavy chassis dynamometer. BACKGROUND

[0002] In the field of vehicle performance detection, heavy chassis dynamometer as the core testing equipment is mainly used for the power performance, economy performance and emission performance test of 3.5t-55t medium and heavy vehicles. Its working principle is to make the measured vehicle drive wheel drive the dynamometer wheel hub to carry out dynamic test through simulating the inertia load when the vehicle runs. Since the dynamometer wheel hub system itself has about 5t basic inertia, when testing the light vehicle with the quality less than 5t, the drive inertia of the measured vehicle cannot form effective matching with the inherent inertia of the dynamometer, and the drive wheel is prone to skidding. This not only leads to the test condition unable to proceed normally, but also causes secondary problems such as abnormal tire wear and test data distortion.

[0003] The traditional solution generally adopts physical counterweight method, that is, the equivalent mass of the measured vehicle is increased through the artificial stacking of counterweight blocks. But this method has significant defects: first, the loading and unloading process of the counterweight block is time-consuming and laborious, which seriously affects the test efficiency; second, the selection of counterweight lacks dynamic adjustment ability, and it is difficult to accurately match the inertia demand of different vehicle models; third, the storage and management of a large number of counterweight blocks require additional space, and there are safety hazards. In addition, frequent counterweight adjustment will also cause the equipment foundation structure to bear periodic impact load, affecting the long-term use stability of the dynamometer.

[0004] Although there are some attempts of electric loading device in the prior art, there are still deficiencies in response speed, loading accuracy and system reliability. Especially for the dynamometer working condition test requiring fast dynamic response, the traditional mechanical loading device cannot meet the technical requirements of real-time inertia compensation. Therefore, it is urgent to develop a new type of shaft load loading device, which can not only realize accurate inertia matching, but also adapt to the rapid test demand of different vehicle models, and has high reliability and operation convenience. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides a shaft load loading device and heavy chassis dynamometer, the utility model innovatively adopts hydraulic loading mode, which can accurately control the force exerted by the hydraulic oil cylinder and directly act on the drive axle of the vehicle under test. This method overcomes many shortcomings of the traditional counterweight block method, can more accurately and efficiently realize the inertia matching of the measured vehicle and the wheel hub, can effectively avoid the phenomenon of drive wheel skidding, ensure the accuracy of test data and the safety of test process, provide a more reliable and convenient solution for the working condition test of heavy chassis dynamometer, greatly improve the test efficiency and quality.

[0006] Specifically, the following technical solutions are included:

[0007] The utility model provides a kind of axle load loading device, including chassis and the top cover located above the chassis, rotatable left hub and right hub are arranged on the chassis, bottom plate is fixedly connected in the lower middle of the chassis, hydraulic cylinder is connected above the bottom plate, the output end of the hydraulic cylinder is connected with connecting block, a plurality of lifting eyes are connected above the connecting block, the hydraulic cylinder, the connecting block and a plurality of the lifting eyes are between the left hub and right hub;One side of the chassis is fixedly connected with hydraulic station, and the hydraulic station is connected with the hydraulic cylinder by oil pipe.

[0008] In an embodiment of the utility model, first holes are formed on both sides of the top cover, and the two first holes are respectively located directly above the left hub and the right hub.

[0009] In an embodiment of the utility model, a second hole is formed in the middle of the top cover, and the second hole is located directly above the plurality of lifting eyes.

[0010] In an embodiment of the utility model, the output end of the hydraulic cylinder is connected with the connecting block through a pin.

[0011] In an embodiment of the utility model, the lifting eyes are connected with the rear axle of the vehicle under test on the top cover through a strap.

[0012] In an embodiment of the utility model, a control panel is fixedly connected to one side of the top cover, the control panel is in data connection with the hydraulic station, and the control panel controls the operation of the hydraulic cylinder through the hydraulic station.

[0013] In an embodiment of the utility model, the number of hydraulic cylinders is two, and the two ends of the connecting block are respectively connected to the top ends of the two hydraulic cylinders.

[0014] In an embodiment of the utility model, the number of lifting eyes is four, and the four lifting eyes are uniformly fixed on the connecting block.

[0015] The utility model provides a heavy chassis dynamometer, comprising the axle load loading device.

[0016] The utility model has the following beneficial effects:

[0017] The axle load loading device and heavy chassis dynamometer provided by the utility model have the advantages of adopting the hydraulic loading mode innovatively, being capable of accurately controlling the force applied by the hydraulic oil cylinder and directly acting on the drive axle of the vehicle to be tested, overcoming many defects of the traditional counterweight mode, being capable of more accurately and efficiently realizing inertia matching of the vehicle to be tested and the wheel hub, effectively avoiding the phenomenon of driving wheel skidding, ensuring the accuracy of test data and the safety of the test process, providing a more reliable and convenient solution for working condition test of the heavy chassis dynamometer and greatly improving test efficiency and quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides axle load loading device's perspective view.

[0019] Figure 2 The utility model provides axle load loading device partial structure's plan view.

[0020] Figure 3 The utility model provides axle load loading device partial structure's plan view. Figure 2 The utility model provides axle load loading device partial structure's plan view.

[0021] Figure 4 The utility model provides axle load loading device partial structure's plan view. Figure 2 The utility model provides axle load loading device partial structure's plan view.

[0022] Figure 5 The utility model provides axle load loading device partial structure's plan view.

[0023] In the drawing: 1, bottom frame;2, top cover;21, first hole hole;22, second hole hole;3, hydraulic station;4, oil pipe;5, control panel;6, connecting block;7, lifting ring;8, left wheel hub;9, right wheel hub;10, bottom plate;11, hydraulic oil cylinder;12, pin. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] In the utility model, unless another definite provision and limitation, the term "connect", "connection", "fixed" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation. For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according of the specific circumstances.

[0026] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0027] As Figures 1-5 The utility model provides a kind of axle load loading device, including chassis 1 and the top cover 2 located above the chassis 1, rotatable left wheel hub 8 and right wheel hub 9 are arranged on the chassis 1, bottom plate 10 is fixedly connected in the middle of the chassis 1, the top of the bottom plate 10 is connected with hydraulic oil cylinder 11, the output end of the hydraulic oil cylinder 11 is connected with connecting block 6, the top of the connecting block 6 is connected with several lifting rings 7, the hydraulic oil cylinder 11, the connecting block 6 and several lifting rings 7 are located between the left wheel hub 8 and right wheel hub 9;One side of the chassis 1 is fixedly connected with hydraulic station 3, and the hydraulic station 3 is connected with the hydraulic oil cylinder 11 by oil pipe 4.

[0028] In some embodiments, the two sides of the top cover 2 are provided with first holes 21, and the two first holes 21 are located directly above the left wheel hub 8 and the right wheel hub 9, respectively.

[0029] When performing vehicle testing, the tested vehicle is moved to the top cover 2, and the drive wheels of the tested vehicle abut against the left wheel hub 8 and the right wheel hub 9 through the first holes 21, and the drive wheels of the tested vehicle drive the dynamometer wheel hub to perform dynamic testing.

[0030] In some embodiments, a second hole 22 is formed in the middle of the top cover 2, and the second hole 22 is located directly above the plurality of lifting rings 7.

[0031] In some embodiments, the output end of the hydraulic cylinder 11 is connected with the connecting block 6 through a pin 12.

[0032] In some embodiments, the lifting ring 7 is connected with the rear axle of the tested vehicle on the top cover 2 through a strap.

[0033] In the embodiment, the second hole 22 of the top cover 2 is located directly above the lifting rings 7, so that the strap connected with the lifting ring 7 can pass through the second hole 22 and be connected with the rear axle of the tested vehicle, thereby loading the axle load of the tested vehicle.

[0034] In some embodiments, a control panel 5 is fixedly connected to one side of the top cover 2, the control panel 5 is in data connection with the hydraulic station 3, and the control panel 5 controls the working of the hydraulic cylinder 11 through the hydraulic station 3.

[0035] Optionally, the number of the hydraulic cylinder 11 is two, and the two ends of the connecting block 6 are connected to the top ends of the two hydraulic cylinders 11.

[0036] Optionally, the number of the lifting ring 7 is four, and the four lifting rings 7 are uniformly fixed on the connecting block 6.

[0037] In addition, the utility model also provides a heavy chassis dynamometer, including axle load loading device.

[0038] During testing, the tested vehicle is parked above the left hub 8 and the right hub 9, the hydraulic cylinder 11 is controlled to rise to an appropriate height, then the rear axle of the tested vehicle is connected with the lifting ring 7 on the hydraulic cylinder 11 through a strap, the two hydraulic cylinders 11 are controlled to descend at the same time until reaching the pressure value set by the control panel 5 and being in the pressure maintaining mode, at this time, the axle load loading of the tested vehicle is completed. The operator can freely input the required load through the control panel 5, and the control panel 5 controls the working of the hydraulic cylinder 11 through the hydraulic station 3, so as to accurately control the force applied by the hydraulic cylinder 11.

[0039] In conclusion, the axle load loading device and the heavy chassis dynamometer provided by the utility model innovatively adopt the hydraulic loading mode, can accurately control the force applied by the hydraulic cylinder, and directly acts on the drive axle of the tested vehicle. This mode overcomes many shortcomings of the traditional counterweight block mode, can more accurately and efficiently realize the inertia matching of the tested vehicle and the hub, can effectively avoid the phenomenon of driving wheel slip, ensures the accuracy of test data and the safety of test process, provides a more reliable and convenient solution for the working condition test of the heavy chassis dynamometer, and greatly improves the test efficiency and quality.

[0040] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist in contradiction, it should be considered as falling within the scope of the present disclosure.

[0041] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these modifications and improvements fall within the protection scope of the present application.

[0042] The principles and implementation manners of the present application are described by using specific embodiments in the present application, and the above embodiments are only used to help understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the principles of the present application, and these modifications and improvements also fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An axle load loading device, characterized in that, Including the chassis and the top cover above the chassis, the chassis is arranged with rotatable left wheel hub and right wheel hub, the bottom of the middle of the chassis is fixedly connected with the bottom plate, the top of the bottom plate is connected with the hydraulic oil cylinder, the output end of the hydraulic oil cylinder is connected with the connecting block, the top of the connecting block is connected with several lifting rings, the hydraulic oil cylinder, the connecting block and several lifting rings are located between the left wheel hub and the right wheel hub, one side of the chassis is fixedly connected with the hydraulic station, the hydraulic station is connected with the hydraulic oil cylinder through the oil pipe.

2. The axle load loading device of claim 1, wherein, The two sides of the top cover are provided with first holes, and the two first holes are located above the left wheel hub and the right wheel hub respectively.

3. The axle load loading device of claim 1, wherein, The middle of the top cover is provided with a second hole, and the second hole is located above the several lifting rings.

4. The axle load loading apparatus according to claim 1, characterized by The output end of the hydraulic oil cylinder is connected with the connecting block through the pin.

5. The axle load loading device of claim 3, wherein, The lifting ring is connected with the rear axle of the vehicle to be tested on the top cover through the binding belt.

6. The axle load loading apparatus according to claim 1, wherein One side of the top cover is fixedly connected with the control panel, the control panel is connected with the hydraulic station, and the control panel controls the hydraulic oil cylinder through the hydraulic station.

7. The axle load loading device of claim 1, wherein, The number of the hydraulic oil cylinder is two, and the two ends of the connecting block are connected with the top of the two hydraulic oil cylinders respectively.

8. The axle load loading apparatus according to claim 1, characterized by The number of the lifting ring is four, and the four lifting rings are evenly fixed on the connecting block.

9. A heavy duty chassis dynamometer characterized by, The axle load loading device of any one of claims 1-8 is included.

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