A lifting and loading platform for field transport vehicles and a control method thereof

Abstract

The present application relates to a kind of field transport vehicle lifting and loading platform and its control method, the lifting and loading platform includes: frame, including front frame and rear frame, the front frame is provided with front walking wheel group, the rear frame is provided with rear walking wheel group;Lifting support frame, including several first drive cylinders, a part of first drive cylinder is set in the front frame, another part of first drive cylinder is set in the rear frame, the output direction of the first drive cylinder is downward, the fixed mounting end of several first drive cylinders constitutes first plane, several first drive cylinders jointly drive one support frame to move up and down, and the support frame is located below the first plane;Lifting portal, the front frame and the rear frame are provided with the lifting portal;Lifting platform, between the lifting portal, the lifting platform can move up and down by the lifting portal drive, so that the lifting platform can be moved to below the first plane.

Description

Technical Field

[0001] The present invention relates to the field of lifting and loading platforms, and in particular to a lifting and loading platform for field transport vehicles and a control method thereof. Background Art

[0002] In some outdoor environments, large forklifts may not be able to enter the environment, or in places where large forklifts are not available, manual forklifts are needed to move goods. The lifting and loading platform is an emerging loading and unloading equipment. It has many advantages, such as smooth lifting, strong load capacity, safety and reliability, and easy operation. It can effectively solve the technical problems of material loading and unloading. The existing technology uses a lifting and loading platform to lift the manual forklift and the goods to a certain height after the manual forklift picks up the goods, so that the manual forklift can rise to the corresponding truck.

[0003] To ensure stability during the lifting process and accommodate the smaller wheels of manual forklifts, the lifting platform requires a low center of gravity and a large support surface. However, given the varied terrain of outdoor environments, the platform's chassis must be kept as far away from the ground as possible to prevent collisions with puddles, rocks, and ramps. Therefore, achieving a low center of gravity, adapting to outdoor conditions, and meeting the requirements of manual forklifts presents a difficult technical challenge.

[0004] In view of the above problems existing in the prior art, the purpose of the present invention is to design a lifting and loading platform for field transport vehicles and a control method thereof. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned prior art, the present invention provides a lifting and loading platform for field transport vehicles and a control method thereof, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A lifting and loading platform for a field transport vehicle, the lifting and loading platform comprising:

[0008] The vehicle frame comprises a front frame and a rear frame, wherein the front frame is provided with a front running wheel set, and the rear frame is provided with a rear running wheel set;

[0009] A lifting support frame includes a plurality of first drive cylinders, some of which are disposed on the front frame, and others of which are disposed on the rear frame, wherein the output direction of the first drive cylinders is downward, and the fixed mounting ends of the plurality of first drive cylinders form a first plane, and the plurality of first drive cylinders jointly drive a support frame to move up and down, and the support frame is located below the first plane;

[0010] A lifting gantry, both the front frame and the rear frame are provided with the lifting gantry;

[0011] A lifting platform is arranged between the lifting gantries. The lifting platform can move up and down through the lifting gantries. After the first driving cylinder drives the support frame to move downward, an additional downward movement space for the corresponding support frame is formed in the frame, so that the lifting platform can move down to below the first plane.

[0012] Furthermore, the lifting gantry includes a first-level gantry and a second-level gantry. The second-level gantry is slidably connected to the first-level gantry. The first-level gantry drives the second-level gantry to move up and down through the corresponding first-level oil cylinder, and the second-level gantry drives the lifting platform to move up and down through the corresponding second-level oil cylinder.

[0013] Furthermore, the lifting platform includes a base surface, and the lifting platform is connected to the lifting gantry at a position higher than the base surface.

[0014] Furthermore, the lifting platform is provided with a movable carrier plate on its front side and / or rear side, the bottom end of the movable carrier plate is hinged to the base surface, and the movable carrier plate forms a slope plate between the lifting platform and the ground when lowered, and forms a protective fence when the movable carrier plate is recovered.

[0015] Furthermore, the movable carrier plate is driven by a corresponding second driving cylinder. After the second driving cylinder drives the movable carrier plate down to contact the ground, the second driving cylinder can continue to apply the first driving force to the movable carrier plate, so that the movable carrier plate and the front walking wheel group and the rear walking wheel group are jointly supported on the ground, thereby increasing the grip of the lifting and loading platform on the ground.

[0016] Furthermore, the second driving cylinder is provided with an oil pressure sensor, and the lifting and loading platform includes a control system, which is used to obtain the oil pressure sensor and thus obtain the output force of the second driving cylinder, and then control the second driving cylinder to maintain applying the first driving force.

[0017] Furthermore, the front frame is provided with a traction frame, which is used to be connected to a tractor that provides power, and the traction frame controls the left and right rotation of the front running wheel group.

[0018] Furthermore, the rear running wheel group is connected through an axle, and the middle position of the axle is hinged to the rear frame to form a single-point support structure. During the movement of the lifting and loading platform, the single-point support structure enables at least one running wheel of the rear running wheel group and the front running wheel group to form a support surface.

[0019] Furthermore, a control method for a lifting and loading platform for a field transport vehicle is provided, based on the aforementioned lifting and loading platform for a field transport vehicle, comprising the following steps:

[0020] When the lifting and loading platform is loading and unloading, the following steps are executed: controlling the lifting support frame to descend below the first plane, controlling the lifting gantry to lower the lifting platform below the first plane, and controlling the movable carrier plate to descend to form a slope plate between the lifting platform and the ground;

[0021] When the lifting and loading platform is moving, the following steps are executed: controlling the movable carrier plate to be retracted upward, controlling the lifting gantry to make the lifting platform rise above the first plane, and controlling the lifting support frame to rise close to the first plane so that the lifting support frame maintains a certain distance from the ground.

[0022] Furthermore, when the lifting and loading platform is loading and unloading goods, after controlling the movable carrier plate to be lowered to form a slope plate between the lifting platform and the ground, the following is executed: the first driving force is continued to be applied to the movable carrier plate by the second driving cylinder, so that the movable carrier plate and the front walking wheel group and the rear walking wheel group are jointly supported on the ground, thereby increasing the grip of the lifting and loading platform on the ground.

[0023] Therefore, the present invention provides the following effects and / or advantages:

[0024] Through the mutual cooperation of the lifting support frame and the lifting platform, the present application can raise the lifting support frame and the lifting platform when walking to avoid road obstacles, and lower the lifting support frame and the lifting platform when loading and unloading goods, so that the lifting platform is closer to the ground, and the inclination angle between the movable carrier plate and the ground is reduced, so that a manual forklift can climb onto the lifting platform.

[0025] The present application can achieve the movable carrier plate gripping the ground and preventing the vehicle body from shifting by cooperating with the movable carrier plate and the driving cylinder.

[0026] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0028] Figure 2 for Figure 1 Schematic diagram of the structure behind the hidden lifting platform and door frame.

[0029] Figure 3 This is a structural diagram of the lifting platform and gantry.

[0030] Figure 4 This is a schematic diagram of the state in which the lifting support frame and the lifting platform are both raised when the lifting and loading platform is moving.

[0031] Figure 5Schematic diagram of the state where the lifting support frame and lifting platform are both lowered when loading and unloading the lifting loading platform. DETAILED DESCRIPTION

[0032] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments and the accompanying drawings:

[0033] refer to Figure 1-3 , a lifting and loading platform for field transport vehicles, the lifting and loading platform comprising:

[0034] The vehicle frame 1 includes a front frame 101 and a rear frame 102 , wherein the front frame 101 is provided with a front running wheel set 103 , and the rear frame 102 is provided with a rear running wheel set 104 ;

[0035] In this embodiment, the front frame 101 and the rear frame 102 each include a mast connector 105, which is connected to the middle of the front frame 101 or the rear frame 102. The front frame 101 and the rear frame 102 are each provided with one or more of a battery, a hydraulic station, and an electric control box.

[0036] The lifting support frame 2 includes a plurality of first drive cylinders 201, some of which are arranged on the front frame 101, and the other portion of the first drive cylinders 201 are arranged on the rear frame 102. The output direction of the first drive cylinders 201 is downward, and the fixed mounting ends of the plurality of first drive cylinders 201 form a first plane. The plurality of first drive cylinders 201 jointly drive a support frame 202 to move up and down, and the support frame 202 is located below the first plane.

[0037] In this embodiment, the support frame 202 is a square frame structure, and there are four first drive cylinders 201, connected to the four corners of the support frame 202. The front frame 101 and the rear frame 102 are connected together via the first drive cylinders 201 and the support frame 202. In this embodiment, the first drive cylinders 201 are flanged cylinders, two of which are fixedly connected to the front frame 101 via flanges, and the other two are fixedly connected to the rear frame 102 via flanges. The flanged ends of the four first drive cylinders 201 form a first plane 203. The support frame 202 moves below the upper ends of the first drive cylinders 201.

[0038] The first plane 203 of this embodiment is as follows Figure 2 During the movement of the traveling wheel assembly, the support frame 202 can be lifted by the first driving cylinder 201 so as to be close to the first plane 203. At this time, the chassis height of the entire lifting and loading platform can be raised, thereby avoiding collision with obstacles on the ground.

[0039] A lifting gantry 3, both the front frame 101 and the rear frame 102 are provided with the lifting gantry 3;

[0040] The lifting gantry 3 in this embodiment is a stack of gantry structures arranged relatively to each other. The lifting gantry 3 has the function of rising and falling, thereby lifting or lowering the structure between the lifting gantry 3.

[0041] The lifting platform 4 is arranged between the lifting gantries 3. The lifting platform 4 can move up and down through the lifting gantries 3. After the first driving cylinder 201 drives the support frame 202 to move downward, an additional downward movement space for the corresponding support frame is formed in the frame 1, so that the lifting platform 4 can move downward to below the first plane 203.

[0042] In this embodiment, as introduced in the background technology, in an outdoor environment, a large combustion forklift may not be able to reach, and in this case, a manual forklift is needed to fork the goods. However, the manual forklift does not have a lifting function, so it is necessary to cooperate with a field transport vehicle provided in this embodiment to use a lifting and loading platform to lift the manual forklift with the goods, and then deliver it to the corresponding container. In an outdoor environment, due to the complex and changeable terrain, the lifting platform 4 and the lifting gantry 3 can be lifted to a certain height when the lifting and loading platform is moving, so as to avoid obstacles on the ground. At this time, the lifting platform 4 is in a position close to the first plane 203, as shown in FIG. Figure 4 As shown. When loading and unloading the lifting and loading platform, the support frame 202 can be lowered to lower the center of gravity of the lifting and loading platform, and at the same time, space is provided for the lifting platform 4 to further descend. This space is located below the first plane 203, so that the lifting platform 4 can be further lowered. At this time, according to the output of the first drive cylinder 201, the lifting platform 4 can be lowered to an appropriate height, so that the lifting platform 4 is closer to the ground, reducing the height difference between the lifting platform 4 and the ground, and facilitating the manual forklift with small wheels to drive from the ground to the lifting platform 4, as shown. Figure 5 shown.

[0043] At the same time, the output length of the first driving cylinder 201 can be optionally greater than the distance between the first plane 203 and the ground, so that the support frame 202 is fully extended to the ground, so that the support frame 202 and the front and rear moving wheel groups 103 and 104 are supported on the ground together to withstand complex terrain in the wild. In addition, on muddy ground, if the front and rear moving wheel groups fall into a mud pit, the lifting and loading platform can be supported on the ground or raised by the support frame 202 to make the front and rear moving wheel groups out of the mud pit.

[0044] Furthermore, the lifting gantry 3 includes a first-level gantry 301 and a second-level gantry 302. The second-level gantry 302 is slidably connected to the first-level gantry 301. The first-level gantry 301 drives the second-level gantry 302 to move up and down through the corresponding first-level cylinder 303. The second-level gantry 302 drives the lifting platform 4 to move up and down through the corresponding second-level cylinder 304.

[0045] In this embodiment, through the structure of the first-level gantry 301 and the second-level gantry 302, the second-level gantry 302 and its second-level oil cylinder 304 can be lifted to the top of the first-level gantry 301 through the first-level gantry 301, and then the lifting platform 4 can be further lifted through the second-level gantry 302, so that a higher lifting height of the lifting platform 4 can be achieved through the cooperation of the two gantries, making the structure compact.

[0046] Furthermore, the lifting platform 4 includes a base surface 401 , and the lifting platform 4 is connected to the lifting gantry 3 at a position higher than the base surface 401 .

[0047] In this embodiment, the lifting platform 4 is provided with a lifting platform fixed bar 402, and the lifting platform fixed bar 402 is higher than the base surface 401, so that when the gantry 3 lowers the base surface 401 to the lower limit position of the gantry 3, the base surface 401 can be lower than the bottom end of the gantry 3, so that the base surface 401 can reach below the first plane 203.

[0048] Furthermore, the lifting platform 4 is provided with a movable carrier plate 403 on its front side and / or rear side, and the bottom end of the movable carrier plate 403 is hinged to the base surface 401. When the movable carrier plate 403 is lowered, a slope plate is formed between the lifting platform 4 and the ground. When the movable carrier plate 403 is recovered, a protective fence is formed.

[0049] In this embodiment, the movable carrier plate 403 can form a slope after being lowered to facilitate a manual forklift to enter the lifting platform 4. After being folded upward, the movable carrier plate 403 and the lifting platform fixed bar 402 form an outer fence structure above the base surface 401, and the movable carrier plate 403 and the lifting platform fixed bar 402 have the same height.

[0050] Furthermore, the movable carrier plate 403 is driven by the corresponding second driving cylinder 404. After the second driving cylinder 404 drives the movable carrier plate 403 down to contact the ground, the second driving cylinder 404 can continue to apply the first driving force to the movable carrier plate 403, so that the movable carrier plate 404 and the front walking wheel group 101 and the rear walking wheel group 102 are jointly supported on the ground, thereby increasing the grip of the lifting and loading platform on the ground.

[0051] At the same time, when a forklift or other similar vehicle enters or exits the lifting and loading platform, due to the height difference between the ground and the base surface 401, the forklift's upward movement exerts a lateral force on the movable carrier plate 403. This lateral force can cause the platform to shift, particularly in low-friction locations such as muddy terrain outdoors. In this embodiment, after the movable carrier plate 403 descends, the second drive cylinder 404 continues to apply a driving force to the movable carrier plate 403, causing the distal end of the movable carrier plate 403 to grip the ground, thereby preventing the platform from shifting.

[0052] Furthermore, the second driving cylinder 404 is provided with an oil pressure sensor (not shown), and the lifting and loading platform includes a control system (not shown), which is used to obtain the oil pressure sensor and thus obtain the output force of the second driving cylinder 404, and then control the second driving cylinder 404 to maintain applying the first driving force.

[0053] In this embodiment, the second drive cylinder 404 is controlled by a corresponding hydraulic station. The oil pressure applied to the second drive cylinder 404 is detected by an oil pressure sensor. After the second drive cylinder 404 lowers the movable carrier 403 to the ground, the second drive cylinder 404 maintains a certain output force, and the internal oil pressure begins to rise. When the oil pressure reaches a certain threshold, the hydraulic station maintains the oil pressure, thereby controlling the second drive cylinder 404 to maintain the first driving force. Under this driving force, the distal end of the movable carrier 403 is in close contact with the ground. Furthermore, the movable carrier 403 can be lowered to a position where it touches the ground before maintaining the first driving force, regardless of terrain shape, allowing for diverse applications.

[0054] Furthermore, the front frame 101 is provided with a traction frame 5 , and the traction frame 5 is used to be connected to a tractor that provides power, and the traction frame 5 controls the front running wheel set 103 to rotate left and right.

[0055] The structure and working principle of the traction frame 5 are prior art. In this embodiment, the traction frame 5 is added, and the traction frame is respectively connected to the left and right wheels of the front moving wheel group 103, so that when the traction frame 5 is rotated left and right, it can also control the left and right wheels of the front moving wheel group 103 to rotate accordingly.

[0056] Furthermore, the rear running wheel group 102 is connected through the axle 6, and the middle position of the axle 6 is hinged to the rear frame 102 to form a single-point support structure. During the movement of the lifting and loading platform, the single-point support structure enables at least one running wheel of the rear running wheel group 102 and the front running wheel group to form a support surface.

[0057] In this embodiment, during the turning process, the lifting and loading platform may tilt. Since the front moving wheel group 103 is pulled by the traction frame 5 to achieve left and right rotation, while the rear moving wheel group 104 cannot rotate, when the turning speed is too fast or the terrain is uneven, the rear moving wheel group 104 has a seesaw-like structure through the single-point support structure. Its characteristic is that no matter what the situation, at least one rear moving wheel is in contact with the ground, and both front moving wheels are in contact with the ground, which forms a triangular support surface, thereby improving the stability of the lifting and assembly platform.

[0058] A control method for a lifting and loading platform for a field transport vehicle is further provided, based on the aforementioned lifting and loading platform for a field transport vehicle, comprising the following steps:

[0059] When loading and unloading cargo on the lifting and stowage platform, perform the following:

[0060] Controlling the lifting support frame to descend below the first plane, controlling the lifting gantry to lower the lifting platform below the first plane, and controlling the movable carrier plate to lower to form a slope plate between the lifting platform and the ground;

[0061] In this step, when loading and unloading the lifting platform, the support frame is brought as close to the ground as possible, so that there is extra space between the support frame and the first plane for the lifting platform to further descend. Figure 5 As shown, after the movable carrier is lowered, Figure 3 This step brings the lift platform closer to the ground, making it easier for a forklift to move onto the lift platform.

[0062] When the lifting and loading platform is moving, the following steps are executed: controlling the movable carrier plate to be retracted upward, controlling the lifting gantry to make the lifting platform rise above the first plane, and controlling the lifting support frame to rise close to the first plane so that the lifting support frame maintains a certain distance from the ground.

[0063] In this step, the movable carrier is folded up. Figure 4 As shown, it can be used to transport manual forklifts and forked goods, or operators to avoid obstacles on the ground.

[0064] Furthermore, when the lifting and loading platform is loading and unloading goods, after controlling the movable carrier plate to be lowered to form a slope plate between the lifting platform and the ground, the following is executed: the first driving force is continued to be applied to the movable carrier plate by the second driving cylinder, so that the movable carrier plate and the front walking wheel group and the rear walking wheel group are jointly supported on the ground, thereby increasing the grip of the lifting and loading platform on the ground.

[0065] In this step, the movable carrier continues to apply downward force after contacting the ground, so that the movable carriers on both sides grasp the ground, preventing the lifting and loading platform from moving under force, and also increasing the support area of ​​the lifting and loading platform and increasing the stability of the lifting and loading platform.

[0066] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third etc. does not indicate any order. These words may be interpreted as names.

[0067] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0068] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0069] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

Claims

1. A lifting and loading platform for field transport vehicles, characterized by: The lifting and loading platform includes: The vehicle frame comprises a front frame and a rear frame, wherein the front frame is provided with a front running wheel set, and the rear frame is provided with a rear running wheel set; A lifting support frame includes a plurality of first drive cylinders, some of which are disposed on the front frame, and others of which are disposed on the rear frame, wherein the output direction of the first drive cylinders is downward, and the fixed mounting ends of the plurality of first drive cylinders form a first plane, and the plurality of first drive cylinders jointly drive a support frame to move up and down, and the support frame is located below the first plane; A lifting gantry, both the front frame and the rear frame are provided with the lifting gantry; a lifting platform, arranged between the lifting gantries, the lifting platform being movable up and down by being driven by the lifting gantries, wherein after the first driving cylinder drives the support frame downward, additional downward movement space of the corresponding support frame is formed in the vehicle frame, so that the lifting platform can be moved downward to below the first plane; The lifting platform includes a base surface, and the lifting platform is connected to the lifting gantry at a position higher than the base surface; The lifting platform is provided with a movable carrier plate at its front side and / or rear side, the bottom end of the movable carrier plate is hinged to the base surface, and the movable carrier plate forms a slope plate between the lifting platform and the ground when lowered, and forms a protective fence when retracted; The movable carrier plate is driven by a corresponding second driving cylinder. After the second driving cylinder drives the movable carrier plate down to contact the ground, the second driving cylinder can continue to apply the first driving force to the movable carrier plate, so that the movable carrier plate and the front and rear traveling wheel groups are jointly supported on the ground, thereby increasing the grip of the lifting and loading platform on the ground.

2. The lifting and loading platform for field transport vehicles according to claim 1, characterized in that: The lifting gantry includes a first-level gantry and a second-level gantry. The second-level gantry is slidably connected to the first-level gantry. The first-level gantry drives the second-level gantry to move up and down through the corresponding first-level oil cylinder. The second-level gantry drives the lifting platform to move up and down through the corresponding second-level oil cylinder.

3. The lifting and loading platform for field transport vehicles according to claim 1, characterized in that: The second driving cylinder is provided with an oil pressure sensor, and the lifting and loading platform includes a control system, which is used to obtain the oil pressure sensor and thus obtain the output force of the second driving cylinder, and then control the second driving cylinder to keep applying the first driving force.

4. The lifting and loading platform for field transport vehicles according to claim 1, characterized in that: The front frame is provided with a traction frame, which is used to be connected to a tractor that provides power, and the traction frame controls the front running wheel group to rotate left and right.

5. The lifting and loading platform for field transport vehicles according to claim 4, characterized in that: The rear running wheel group is connected via an axle, and the middle position of the axle is hinged to the rear frame to form a single-point support structure. During the movement of the lifting and loading platform, the single-point support structure enables at least one running wheel of the rear running wheel group and the front running wheel group to form a support surface.

6. A control method for a lifting and loading platform for a field transport vehicle, characterized in that: The lifting and loading platform for field transport vehicles according to claim 3 comprises the following steps: When the lifting and loading platform is loading and unloading, the following steps are executed: controlling the lifting support frame to descend below the first plane, controlling the lifting gantry to lower the lifting platform below the first plane, and controlling the movable carrier plate to descend to form a slope plate between the lifting platform and the ground; When the lifting and loading platform is moving, the following steps are executed: controlling the movable carrier plate to be retracted upward, controlling the lifting gantry to make the lifting platform rise above the first plane, and controlling the lifting support frame to rise close to the first plane so that the lifting support frame maintains a certain distance from the ground.

7. The control method of the lifting and loading platform for field transport vehicles according to claim 6, characterized in that: When the lifting and loading platform is loading and unloading, after controlling the movable carrier plate to be lowered to form a slope plate between the lifting platform and the ground, the following is executed: the first driving force is continued to be applied to the movable carrier plate by the second driving cylinder, so that the movable carrier plate and the front running wheel group and the rear running wheel group are jointly supported on the ground, thereby increasing the grip of the lifting and loading platform on the ground.

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