A vibration durability testing platform for electric agricultural machinery chassis

Abstract

The invention discloses an electric agricultural machinery chassis vibration durability testing platform, comprising an electrically driven platform body, an internal lubrication device installed inside the platform body, a traction device arranged at one end of the platform body, and a ramp device arranged at the other end, the ramp device being rotated upward and flipped up to limit the backward movement of the chassis being tested; the equipment occupies a small area, has stable testing parameters and lower testing costs.

Description

Technical Field

[0001] The invention relates to a vibration durability detection platform for an electric agricultural machinery chassis. Background Art

[0002] The vehicle's chassis system consists of a frame, suspension and wheels. The operating environment of agricultural vehicles is more severe, so there are higher technical requirements for the structural strength and vibration resistance of the chassis.

[0003] During the research and development of agricultural machinery chassis, the developed and assembled chassis needs to be tested for vibration durability. The purpose of the test is to determine whether the chassis structure of the vehicle is still stable under high-frequency vibration, whether the strength is sufficient, and whether there is any cracking.

[0004] The traditional testing method is to conduct the test in a closed test site, which requires laying a lot of speed bumps on the ground. The vehicle relies on personnel to drive and pass the speed bumps frequently. After reaching a certain mileage, the vehicle is tested to determine whether the vibration durability and structural strength of the chassis meet the standards. This testing method has the following disadvantages:

[0005] First, the required site is larger and the investment cost is higher, while the production capacity of agricultural vehicles is low. The excessively high site construction cost leads to a further increase in the design cost of agricultural vehicles, making the company unable to make a profit.

[0006] Second, it requires human operation, and the operator's skills and driving speed are uncontrollable factors, which leads to too many uncertainties in the detection and the accuracy of the detection remains to be discussed.

[0007] Third, agricultural vehicles have high fuel consumption, and their high-intensity operation causes high pollution and costs.

[0008] Based on the above problems, we designed an electric agricultural machinery chassis vibration durability testing platform with a small footprint, stable testing parameters and lower testing costs. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide an electric agricultural machinery chassis vibration durability testing platform which occupies a small area, has stable testing parameters and has lower testing costs.

[0010] To solve the above problems, the present invention adopts the following technical solutions:

[0011] An electric agricultural machinery chassis vibration durability testing platform comprises an electrically driven platform body, an internal lubrication device is installed inside the platform body, a traction device is arranged at one end of the platform body, and a ramp device is arranged at the other end, and the ramp device is rotated upward and flipped up to limit the retreat of the chassis to be tested.

[0012] Preferably, the platform body includes a frame, a treadmill is installed inside the frame, transmission rollers are installed at both ends of the treadmill, the transmission rollers at both ends tension the treadmill, convex strips are provided on the outer surface of the treadmill, the transmission rollers rotate with the frame, a reducer is installed on the outer side of the frame, the reducer is connected to the transmission roller at one end, a driving motor is installed on the input end of the reducer, and a speed regulating switch is connected to the driving motor, the internal lubrication device is installed on the inner side of the frame, passes through the treadmill, and forms a support on the inner side of the treadmill.

[0013] Preferably, the internal lubrication device comprises a trough body, an opening is provided at the upper end of the trough body, connecting rods are provided at both sides of the trough body, and are fixedly connected to the frame through the connecting rods, oil-absorbing cotton is installed in the trough body, a pressure-bearing plate is movably provided in the trough body, and oil holes are evenly distributed on the plate surface of the pressure-bearing plate, and the lower end of the pressure-bearing plate acts on the oil-absorbing cotton, and the upper end of the pressure-bearing plate is supported by the inner surface of the running belt, ear plates are provided on both sides of the pressure-bearing plate, and vertical grooves passing through the ear plates are provided on both sides of the frame, and the ear plates slide vertically along the vertical grooves, and a bracket is provided on the outer side of the frame corresponding to the lower part of the vertical groove, and a guide rod is provided on the top of the bracket, and the guide rod passes through the ear plate upward, and an adjusting sleeve is provided on the guide rod, a locking screw is matched between the adjusting sleeve and the guide rod, and a spring is sleeved on the guide rod, and the spring acts between the adjusting sleeve and the ear plate.

[0014] Preferably, an oil filling pipe extends from the outside of the tank body, passes through the outside of the frame, bends upward, and is matched with an oil pipe cover.

[0015] Preferably, the traction device comprises an L-shaped vertical plate, a plate surface of which is drilled with a through hole, and an anchor structure is fitted through the through hole.

[0016] Preferably, the anchor seat structure includes an anchor rod, a retaining ring is provided on the rod body of the anchor rod, one end of the anchor rod passes through the through hole and cooperates with a limiting screw, a first spring is sleeved on the anchor rod, the first spring acts between the vertical plate and the limiting screw, and a radially penetrating steel cable hole is provided on the outer wall of the anchor rod.

[0017] Preferably, the ramp device includes an inclined plate, a rotating seat is provided at the higher end of the inclined plate, and rotating shafts are provided on both sides of the frame, the rotating seat cooperates with the rotating shaft, and locking rods are provided on both sides of the inclined plate, a first limit screw is screwed into the upper end of the locking rod, a sliding sleeve is sleeved on the locking rod, and a second spring is provided on the locking rod, the second spring is located above the sliding sleeve, baffles are provided on both sides of the frame, and a U-shaped groove is provided on the top of the baffle. When the inclined surface of the inclined plate rotates to be perpendicular to the ground, the locking rod is fitted into the U-shaped groove, and the sliding sleeve is slid at this time to compress the second spring, and the sliding sleeve is limited to the side of the baffle away from the inclined plate. When the chassis of a vehicle on the running belt loses control and hits the inclined plate, the second spring is compressed.

[0018] Preferably, a latch is inserted into the side of the baffle, and the latch limits the upward movement of the locking rod after being inserted.

[0019] Preferably, both sides of the top of the trough body have notches corresponding to the ear plates.

[0020] Preferably, the slope of the inclined plate is less than 20 degrees.

[0021] The beneficial effects of the present invention are:

[0022] Advantage 1: The device is built indoors, so it is not affected by the external weather or the site. There is no need to build a large testing site outdoors, which reduces the initial construction investment.

[0023] The second advantage is that during testing, the device can stabilize the speed of the drive motor and keep the running belt rotating at a constant speed, making the test parameters more stable and the vibration durability test more meaningful.

[0024] Advantage three: no human operation is required, making the entire detection process safer, avoiding personal injury and the uncertainty of human operation.

[0025] Advantage four: the device has high integration and low equipment cost, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 is a cross-sectional view of the internal lubrication device;

[0029] Figure 3 for Figure 2 Enlarged view at B;

[0030] Figure 4 for Figure 1 A magnified view at point A;

[0031] Figure 5 A three-dimensional diagram of the anchor structure. DETAILED DESCRIPTION

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0033] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0034] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, in the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "disposed", "socketed", "connected", "through", "plugged" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figure 1 and Figure 2An electric agricultural machinery chassis vibration durability testing platform shown in the figure comprises an electrically driven platform body 1, an internal lubrication device 2 is installed inside the platform body 1, a traction device 3 is arranged at one end of the platform body 1, and a ramp device 4 is arranged at the other end. After the ramp device 4 is rotated and flipped upward, it forms a limit for the backward movement of the chassis being tested.

[0038] When in use, a steel cable is used to connect the chassis of the vehicle to be inspected, the chassis is pulled along the ramp device 4 to the platform body 1, and then the steel cable is connected to the traction device 3.

[0039] Then the platform body 1 is started, and the wheels of the vehicle are driven to rotate through the platform body 1. As the wheels rotate, the chassis begins to vibrate until the test time is reached.

[0040] The test time varies depending on the test item. For example, when conducting chassis durability tests, the test time is usually more than 96 hours.

[0041] See also Figure 1 As shown, the platform body 1 includes a frame 101, a treadmill 102 is installed inside the frame 101, transmission rollers 103 are installed at both ends of the treadmill 102, the transmission rollers 103 at both ends tension the treadmill 102, and convex strips 104 are provided on the outer surface of the treadmill 102. The transmission rollers 103 rotate with the frame 101, and a reducer 105 is installed on the outer side of the frame 101. The reducer 105 is connected to the transmission roller 103 at one end, and a driving motor 106 is installed at the input end of the reducer 105. The driving motor 106 is connected to a speed regulating switch, and the internal lubrication device 2 is installed on the inner side of the frame 101, passes through the treadmill 102, and forms a support on the inner side of the treadmill 102. Racks are machined on the inner side of the running belt 102 near both ends, and the outer wall of the driving roller 103 has teeth meshing with the racks. The internal lubricating device 2 contacts the inner surface of the running belt 102 but does not contact the racks.

[0042] In the above technical solution, a driving motor 106 is used as a power unit, and the driving load of the driving motor 106 is reduced by a reducer 105, driving one of the transmission rollers 103 to rotate. The rotation of the transmission roller 103 drives the running belt 102 to rotate. The wheels of the vehicle are supported by the running belt 102. As the running belt 102 runs, the wheels of the vehicle roll on the running belt 102, and as the wheels pass through the convex strips 104, vibrations are generated in the chassis.

[0043] The function of the internal lubrication device 2 is to form a support at the bottom of the running belt 102 , reduce the load of the running belt 102 , and extend the service life of the running belt 102 .

[0044] Secondly, the internal lubrication device 2 can squeeze out the lubricating oil as the chassis vibrates, allowing the lubricating oil to contact the inner surface of the running belt 102, making the running belt 102 run more smoothly.

[0045] See also Figure 2 , Figure 3 and Figure 4 As shown, the internal lubrication device 2 includes a trough body 201, an opening is set at the upper end of the trough body 201, connecting rods 202 are set on both sides of the trough body 201, and the trough body 201 is fixedly connected to the frame 101 through the connecting rods 202, and oil-absorbing cotton 203 is installed in the trough body 201, and a pressure plate 204 is movably set in the trough body 201, and oil holes 205 are evenly distributed on the plate surface of the pressure plate 204. The lower end of the pressure plate 204 acts on the oil-absorbing cotton 203, and the upper end of the pressure plate 204 is supported on the inner surface of the running belt 102. Ear plates 206 are set on both sides of the pressure plate 204. A vertical slot 121 passing through the ear plate 206 is provided on the side, and the ear plate 206 slides vertically along the vertical slot 121. On the outer side of the frame 101, a bracket 131 is provided below the vertical slot 121. A guide rod 141 is provided on the top of the bracket 131. The guide rod 141 passes through the ear plate 206 upward. An adjusting sleeve 151 is provided on the guide rod 141. A locking screw 161 is cooperated between the adjusting sleeve 151 and the guide rod 141. A spring 171 is sleeved on the guide rod 141, and the spring 171 acts between the adjusting sleeve 151 and the ear plate 206.

[0046] In the above technical solution, a support is formed at the bottom of the treadmill 102 by the pressure plate 204. When the chassis vibrates, the vibration is transmitted to the pressure plate 204 through the treadmill 102. The pressure plate 204 compresses the spring 171 to absorb energy, and as the pressure plate 204 moves downward, the oil-absorbing cotton 203 is compressed. The lubricating oil absorbed in the oil-absorbing cotton 203 penetrates upward to the surface of the pressure plate 204 through the oil hole 205. The treadmill 102 comes into contact with the lubricating oil during operation, making the operation of the treadmill 102 more lubricated.

[0047] See also Figure 4 As shown, an oil filling pipe 2221 extends from the outer side of the tank body 201 , and the oil filling pipe 2221 passes through the outside of the frame 101 and then bends upward, and is matched with an oil pipe cover 2222 .

[0048] In the above technical solution, lubricating oil can be quickly added through the oil filling pipe 2221.

[0049] See also Figure 1 As shown, the traction device 3 includes an L-shaped vertical plate 301 , a through hole is drilled on the plate surface of the vertical plate 301 , and an anchor structure 31 is fitted through the through hole.

[0050] The vertical plate 301 plays a supporting role, and the anchor structure 31 plays a pulling role.

[0051] See also Figure 5 As shown, the anchor seat structure 31 includes an anchor rod 310, a retaining ring 311 is arranged on the rod body of the anchor rod 310, one end of the anchor rod 310 passes through the through hole and cooperates with a limiting screw 312, a first spring 313 is sleeved on the anchor rod 310, the first spring 313 acts between the vertical plate 301 and the limiting screw 312, and a radially penetrating steel cable hole 314 is arranged on the outer wall of the anchor rod 310.

[0052] In the above technical solution, the first spring 313 can play a certain buffering role. When in use, the steel cable is passed through the steel cable hole 314 and then fixed, and the other end of the steel cable is tied to the chassis of the vehicle. Two steel cables can be used, and the two steel cables are respectively fixed on both sides of the chassis. The ends of the two steel cables pass through the steel cable hole 314 at the same time. This operation can tow the chassis more stably.

[0053] See also Figure 1 and Figure 4 As shown, the ramp device 4 includes an inclined plate 401, a rotating seat 402 is provided at the higher end of the inclined plate 401, a rotating shaft 122 is provided on both sides of the frame 101, the rotating seat 402 cooperates with the rotating shaft 122, and locking rods 403 are provided on both sides of the inclined plate 401. A first limiting screw 404 is screwed into the upper end of the locking rod 403, a sliding sleeve 405 is sleeved on the locking rod 403, and a second spring 406 is provided on the locking rod 403. The second spring 406 is located on the sliding sleeve 405. Above the frame 101, baffles 407 are provided on both sides of the frame 101, and a U-shaped groove 408 is provided on the top of the baffle 407. When the inclined surface of the inclined plate 401 rotates to be perpendicular to the ground, the locking rod 403 is fitted into the U-shaped groove 408, and the sliding sleeve 405 is slid at this time to compress the second spring 406. The sliding sleeve 405 is limited to the side of the baffle 407 away from the inclined plate 401. When the chassis of the vehicle on the running belt 102 loses control and hits the inclined plate 401, the second spring 406 is compressed.

[0054] In the above technical solution, when the inclined plate 401 rotates to contact the ground, it is convenient to drag the chassis to be tested onto the running belt 102.

[0055] Before the test begins, the inclined plate 401 is rotated to intercept the end of the running belt 102. When the steel cable breaks or the chassis is out of control, the chassis will move and hit the inclined plate 401 as the running belt continues to run, preventing the chassis of the tested vehicle from flying off the running belt and causing damage to personnel or equipment.

[0056] In the above technical solution, the impact force of the inclined plate 401 when it is hit can be absorbed by compressing the second spring 406 .

[0057] See also Figure 4 As shown, a latch 477 is inserted into the side of the baffle 407 , and the latch 477 limits the upward movement of the locking rod 403 after being inserted.

[0058] In the above technical solution, when the impact force is too large, the locking rod is prevented from being separated from the U-shaped groove, thereby ensuring that the inclined plate 401 effectively intercepts the chassis.

[0059] See also Figure 3 As shown, both sides of the top of the slot body 201 have notches 2323 corresponding to the ear plates 206 .

[0060] The setting of the notch 2323 provides the pressure plate with a larger downward movement space, thereby facilitating further compression of the oil-absorbing cotton.

[0061] See also Figure 1 As shown, the slope of the inclined surface of the inclined plate 401 is less than 20 degrees.

[0062] In this embodiment, the slope of the inclined plate 401 is 15 degrees.

[0063] If the slope is too large, it will be difficult to drag the chassis onto the running belt. If the slope is too small, the length of the inclined board will be too large, and the weight will be too large, making it difficult to rotate the inclined board.

[0064] Therefore, using an inclined plate 401 with an angle less than 20 degrees can better meet the actual use.

[0065] The chassis vibration durability test method is as follows:

[0066] First, the chassis of the vehicle to be inspected is pulled onto the running belt 102, and then the inclined plate 401 is rotated to a vertical state, and the chassis of the vehicle is fixed to the anchor structure 31 by a steel cable.

[0067] Start the drive motor, which drives the treadmill 102 to rotate, and keep the treadmill 102 running at a low speed of 1 to 2 m / s. Determine whether the steel cable is securely fixed to the chassis, and whether there is any deviation in the operation of the chassis during the operation of the treadmill 102. When there is no deviation, increase the running speed of the treadmill 102 to the detection speed, determine the detection time according to the intensity requirement, turn off the treadmill 102 after the detection time is reached, and check the vehicle chassis.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electric agricultural machinery chassis vibration durability testing platform, characterized in that: The invention comprises an electrically driven platform body (1), wherein an internal lubrication device (2) is installed inside the platform body (1), a traction device (3) is arranged at one end of the platform body (1), and a ramp device (4) is arranged at the other end, wherein the ramp device (4) is rotated upward and flipped up to limit the backward movement of the detected chassis, the platform body (1) comprises a frame (101), a running belt (102) is installed inside the frame (101), transmission rollers (103) are installed at both ends of the running belt (102), the transmission rollers (103) at both ends tension the running belt (102), and convex strips (104) are arranged on the outer surface of the running belt (102). The transmission roller (103) is rotatably matched with the frame (101); a reducer (105) is installed on the outside of the frame (101); the reducer (105) is connected to the transmission roller (103) at one end; a drive motor (106) is installed at the input end of the reducer (105); the drive motor (106) is connected to a speed regulating switch; the internal lubricating device (2) is installed on the inside of the frame (101), passes through the running belt (102), and forms a support on the inside of the running belt (102); the internal lubricating device (2) comprises a trough body (201); an opening is arranged at the upper end of the trough body (201); and both sides of the trough body (201) are A connecting rod (202) is provided, which is fixedly connected to the frame (101) via the connecting rod (202); oil-absorbing cotton (203) is installed in the trough body (201); a pressure plate (204) is movably provided in the trough body (201); oil holes (205) are evenly distributed on the plate surface of the pressure plate (204); the lower end of the pressure plate (204) acts on the oil-absorbing cotton (203); the upper end of the pressure plate (204) is supported on the inner surface of the running belt (102); ear plates (206) are provided on both sides of the pressure plate (204); vertical grooves (121) passing through the ear plates (206) are provided on both sides of the frame (101); The ear plate (206) slides vertically along the vertical groove (121); a bracket (131) is arranged on the outer side of the frame (101) and below the vertical groove (121); a guide rod (141) is arranged on the top of the bracket (131); the guide rod (141) passes through the ear plate (206) upward; an adjustment sleeve (151) is arranged on the guide rod (141); a locking screw (161) is provided between the adjustment sleeve (151) and the guide rod (141); a spring (171) is sleeved on the guide rod (141); the spring (171) acts between the adjustment sleeve (151) and the ear plate (206).

2. The electric agricultural machinery chassis vibration durability testing platform according to claim 1, characterized in that: An oil filling pipe (2221) extends from the outside of the tank body (201); the oil filling pipe (2221) passes through the outside of the frame (101), bends upward, and is matched with an oil pipe cover (2222).

3. The electric agricultural machinery chassis vibration durability testing platform according to claim 1, characterized in that: The traction device (3) comprises an L-shaped vertical plate (301), a through hole being drilled on a plate surface of the vertical plate (301), and an anchor seat structure (31) is fitted through the through hole.

4. The electric agricultural machinery chassis vibration durability testing platform according to claim 3, characterized in that: The anchor seat structure (31) comprises an anchor rod (310), a retaining ring (311) is arranged on the rod body of the anchor rod (310), one end of the anchor rod (310) passes through the through hole and cooperates with a limiting screw (312), a first spring (313) is sleeved on the anchor rod (310), the first spring (313) acts between the vertical plate (301) and the limiting screw (312), and a radially penetrating steel cable hole (314) is arranged on the outer wall of the anchor rod (310).

5. The electric agricultural machinery chassis vibration durability testing platform according to claim 1, characterized in that: The ramp device (4) comprises an inclined plate (401), a rotating seat (402) is arranged at the higher end of the inclined plate (401), rotating shafts (122) are arranged on both sides of the frame (101), the rotating seat (402) cooperates with the rotating shafts (122), locking rods (403) are arranged on both sides of the inclined plate (401), a first limiting screw (404) is screwed into the upper end of the locking rod (403), a sliding sleeve (405) is sleeved on the locking rod (403), and a second spring (406) is arranged on the locking rod (403), and the second spring (406) is located on the sliding sleeve (40 5), baffles (407) are arranged on both sides of the frame (101), and a U-shaped groove (408) is arranged on the top of the baffle (407). When the inclined surface of the inclined plate (401) rotates to be perpendicular to the ground, the locking rod (403) is fitted into the U-shaped groove (408), and the sliding sleeve (405) is slid at this time, so that the second spring (406) is compressed. The sliding sleeve (405) is limited to the side of the baffle (407) away from the inclined plate (401). When the chassis of the vehicle located on the running belt (102) loses control and hits the inclined plate (401), the second spring (406) is compressed.

6. The electric agricultural machinery chassis vibration durability testing platform according to claim 5, characterized in that: A latch pin (477) is inserted into the side of the baffle (407), and after the latch pin (477) is inserted, it limits the upward movement of the locking rod (403).

7. The electric agricultural machinery chassis vibration durability testing platform according to claim 1, characterized in that: Both sides of the top of the trough body (201) are provided with notches (2323) corresponding to the ear plates (206).

8. The electric agricultural machinery chassis vibration durability testing platform according to claim 6, characterized in that: The slope of the inclined surface of the inclined plate (401) is less than 20 degrees.

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