Stack truck based on double-drive steering function and driving method

Abstract

The embodiment of the invention relates to the technical field of storage stacking equipment, and provides a stacking vehicle based on a double-drive steering function, the stacking vehicle comprises a vehicle frame, and the bottom of the vehicle frame is provided with a front wheel set and a rear wheel set; the operating rod is rotationally arranged relative to the frame, a first guide groove and a second guide groove are formed in the two sides of the lower portion of the operating rod respectively, and the directions of the first guide groove and the second guide groove are both horizontal; the first wheel carrier is arranged in the first guide groove in a sliding mode, and the second wheel carrier is arranged in the second guide groove in a sliding mode; the first driving wheel and the second driving wheel are respectively arranged on the first wheel carrier and the second wheel carrier; and the wheel track adjusting assembly is arranged on the frame or oppositely arranged on the operating rod and used for adjusting the sliding positions of the first wheel carrier and the second wheel carrier in the first guide groove and the second guide groove. By means of the technical scheme, the technical problem that in the prior art, steering operation of a stacker is inconvenient is solved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of warehouse stacking equipment, and in particular, to a stacker truck based on a dual-drive steering function and a driving method. Background Art

[0002] In modern logistics and warehousing operations, stacker trucks are critical material handling equipment, and their steering performance is directly related to operational efficiency and safety. Traditional stacker trucks mostly use mechanical steering systems, with the handle rigidly connected to the drive wheel. When handling heavy objects or facing uneven roads, operators find it extremely difficult to turn the handle, making steering operations extremely inconvenient. Even though some stacker trucks have introduced electric steering, which has solved the problem of laborious steering, new problems have emerged, such as a "lack of feel" and deviations in potentiometer measurement accuracy. In addition, some stacker trucks that use differential systems have unstable differential action, making it difficult to achieve precise steering and rapid operation in confined spaces. Therefore, a simple and effective steering structure is needed to solve the technical problem of inconvenient steering during stacker operation. Summary of the Invention

[0003] To overcome the above-mentioned defects, the embodiments of the present disclosure provide a stacker truck and a driving method based on a dual-drive steering function, which solves the technical problem of inconvenient steering operation of stacker trucks in the prior art.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a stacker truck based on a dual-drive steering function, comprising: A frame, wherein the bottom of the frame has a front wheel set and a rear wheel set; An operating rod, the operating rod is rotatably arranged relative to the frame, and has a first guide groove and a second guide groove on both sides of the lower portion, wherein the directions of the first guide groove and the second guide groove are both horizontal; a first wheel frame and a second wheel frame, wherein the first wheel frame is slidably disposed in the first guide groove, and the second wheel frame is slidably disposed in the second guide groove; a first driving wheel and a second driving wheel, wherein the first driving wheel and the second driving wheel are respectively arranged on the first wheel frame and the second wheel frame; A wheelbase adjustment assembly is provided on the vehicle frame or indirectly on the operating rod, and is used for adjusting the sliding positions of the first wheel frame and the second wheel frame in the first guide groove and the second guide groove.

[0005] For example, at least one embodiment of the present disclosure provides a stacker truck based on a dual-drive steering function, further comprising: A rotating member is rotatably arranged on the vehicle frame, the operating lever is arranged on the rotating member, and the wheelbase adjustment assembly is arranged on the vehicle frame or on the rotating member.

[0006] For example, in at least one embodiment of the present disclosure, a stacker truck based on a dual-drive steering function is provided, wherein the wheelbase adjustment assembly includes: a first pushing member, which is arranged on the rotating member or rotates with the operating lever, and has a first pushing surface, and the first wheel frame has a first pushed surface, the first pushing surface abutting against the first pushed surface, and is used to push the first wheel frame to move toward the second wheel frame; a second pushing member, the second pushing member being arranged on the rotating member or the operating rod and rotating therewith, and having a second pushing surface, the second wheel frame having a second pushed surface, the second pushing surface abutting against the second pushed surface, and being used to push the second wheel frame to move toward the first wheel frame; A first elastic member and a second elastic member, one end of the first elastic member acts on the first wheel frame, and the other end acts on the bottom of the first guide groove, for providing a force for the first wheel frame to move away from the second wheel frame; one end of the second elastic member acts on the second wheel frame, and the other end acts on the bottom of the second guide groove, for providing a force for the second wheel frame to move away from the first wheel frame.

[0007] For example, at least one embodiment of the present disclosure provides a forklift based on a dual-drive steering function, wherein the first pushed surface and the second pushed surface are both cam surfaces, and the first pushing surface and the second pushing surface are both cylindrical surfaces, which are used to enable the first pushing member to push the first wheel frame to move after rotation, and enable the second pushing member to push the second wheel frame to move after rotation.

[0008] For example, at least one embodiment of the present disclosure provides a stacker based on a dual-drive steering function, wherein the first wheel frame has a first guide portion, the second wheel frame has a second guide portion, the first guide portion is slidably arranged in the first guide groove, and the second guide portion is slidably arranged in the second guide groove.

[0009] For example, at least one embodiment of the present disclosure provides a stacker based on a dual-drive steering function, wherein the first guide portion has a third guide groove, and the second guide portion slides in the third guide groove at the same time.

[0010] For example, at least one embodiment of the present disclosure provides a stacker truck based on a dual-drive steering function, further comprising: Guide wheels: a plurality of guide wheels are provided on both the first pushing surface and the second pushing surface.

[0011] For example, at least one embodiment of the present disclosure provides a forklift based on a dual-drive steering function, wherein the positions of the first pushing surface and the first pushed surface and the positions of the second pushing surface and the second pushed surface are configured so that when the operating lever rotates clockwise, the first pushed surface approaches and pushes the first pushing surface, so that the first wheel frame approaches the second wheel frame; when it rotates counterclockwise, the second pushed surface approaches and pushes the second pushing surface, so that the second wheel frame approaches the first wheel frame.

[0012] For example, in at least one embodiment of the present disclosure, a stacker truck based on a dual-drive steering function is provided, wherein both the first wheel frame and the second wheel frame include: a first frame body, the first frame body being slidably disposed in the first guide groove or the second guide groove; a second frame, the second frame being hingedly mounted on the first frame, the first drive wheel and the second drive wheel being mounted on the second frame; A spring shock absorber is arranged between the first frame and the second frame.

[0013] According to another aspect, at least one embodiment of the present disclosure further provides a steering drive method, wherein the distance between the first drive wheel and the second drive wheel of the stacker is reduced to perform steering.

[0014] The beneficial effects of the embodiments of the present disclosure are: In the disclosed embodiment, when turning a stacker, the distance between the first and second drive wheels is first adjusted to an appropriate distance using the wheelbase adjustment assembly. In narrow spaces, where the turning radius is small, the first and second drive wheels are adjusted to a smaller distance to facilitate turning. In larger spaces, where a larger turning radius is desired, the first and second drive wheels can be adjusted to a larger distance to maintain both steering and support stability. After the distance between the first and second drive wheels is adjusted to an appropriate distance, the operator grasps and rotates the operating lever, which rotates the first and second wheel frames to enable turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly describes the drawings required for use in describing the embodiments of the present disclosure. Obviously, the drawings described below are merely some exemplary embodiments of the present disclosure. Those skilled in the art can, without inventive effort, derive other drawings based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0016] Figure 1 This is a schematic diagram of the external structure of a stacker in one embodiment of the present disclosure; Figure 2 for Figure 1 Schematic diagram of the internal structure of a stacker in the embodiment of FIG; Figure 3 for Figure 2 Middle A is a schematic diagram of a partially enlarged structure; Figure 4 for Figure 1 A schematic cross-sectional view of the interior of a stacker in an embodiment of the present invention; Figure 5 for Figure 4 Middle B is a schematic diagram of a partially enlarged structure; Figure 6 for Figure 1 Another schematic cross-sectional view of the interior of the stacker in the embodiment; Figure 7 for Figure 6 Middle C is a schematic diagram of the partially enlarged structure; In the figure: vehicle frame 100, front wheel assembly 101, rear wheel assembly 102, operating lever 200, first guide groove 201, second guide groove 202, first wheel frame 301, first pushed surface 3011, first guide portion 3012, first wheel frame first frame body 310, first wheel frame second frame body 320, first wheel frame spring damper 330, second wheel frame 302, second pushed surface 3021, second guide portion 3 022, second wheel frame first frame 310, second wheel frame second frame 320, second wheel frame spring shock absorber 330, first drive wheel 401, second drive wheel 402, first elastic member 501, second elastic member 502, wheelbase adjustment assembly 600, first pushing member 601, first pushing surface 6011, second pushing member 602, second pushing surface 6021, rotating member 700, guide wheel 800. DETAILED DESCRIPTION

[0017] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0018] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0019] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0020] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present disclosure.

[0022] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] like Figures 1 to 7 As shown, it shows a stacker based on dual-drive steering function in one embodiment of the present disclosure, including a frame 100, the bottom of the frame 100 is provided with a front wheel group 101 and a rear wheel group 102, the operating rod 200 is rotatably arranged relative to the frame 100, and the two sides of the lower part are respectively provided with a first guide groove 201 and a second guide groove 202, the directions of the first guide groove 201 and the second guide groove 202 are both horizontal, the first wheel frame 301 is slidably arranged in the first guide groove 201, and the second wheel frame 302 is slidably arranged in the second guide groove 202, the first driving wheel 401 and the second driving wheel 402 are respectively arranged on the first wheel frame 301 and the second wheel frame 302, and the wheelbase adjustment assembly 600 is arranged on the frame 100 or indirectly on the operating rod 200, for adjusting the sliding positions of the first wheel frame 301 and the second wheel frame 302 in the first guide groove 201 and the second guide groove 202.

[0024] The frame 100's bottom structure is a sturdy and durable rectangular frame, providing stable support for the front and rear wheels 101, 102. These wheels are connected to the bottom of the frame. The front wheels 101 typically consist of two universal wheels, allowing for flexible steering and adaptability to different driving paths. The rear wheels 102 typically consist of two fixed wheels, providing stable support and drive.

[0025] The operating rod 200 can be connected to the vehicle frame 100 through a bearing. The first guide groove 201 and the second guide groove 202 on both sides of the lower part of the operating rod 200 are D-shaped groove structures, which can effectively prevent the first wheel frame 301 and the second wheel frame 302 from disengaging during the sliding process.

[0026] The first and second wheel frames 301 and 302 are die-cast from a high-strength aluminum alloy and undergo an aging treatment to enhance their strength and hardness. They fit snugly into D-shaped slots, ensuring smooth and stable sliding. The main body of the wheel frames is designed with reinforcing ribs to enhance structural strength while reducing weight.

[0027] The first driving wheel 401 and the second driving wheel 402 are connected to the first wheel frame 301 and the second wheel frame 302 respectively through the wheel hub. A spline connection is adopted between the wheel hub and the wheel frame to ensure the reliability of power transmission.

[0028] The wheelbase adjustment assembly 600 can be set on the frame 100, or indirectly set on the operating rod 200. Indirectly setting it on the operating rod 200 means that there can be other components in between, and it is set on the operating rod 200 through other components. Operating the wheelbase adjustment assembly 600 can achieve wheelbase adjustment.

[0029] When the operator rotates the operating lever 200 , the rotation of the operating lever drives the first wheel frame 301 and the second wheel frame 302 to rotate to achieve turning.

[0030] Select the appropriate wheelbase adjustment method based on the size of the cargo to be transported. If a wheelbase adjustment assembly mounted on the vehicle frame is used, the wheelbase is adjusted to the desired position using the wheelbase adjustment assembly 600. The wheelbase adjustment assembly 600 can be operated by a handwheel or automatically by an electric push rod. When using the electric adjustment method, the operator adjusts the wheelbase to the desired size directly from the driver's seat by pressing a button.

[0031] When turning, the stacker truck first adjusts the distance between the first and second drive wheels 401, 402 to an appropriate distance using the wheelbase adjustment assembly 600. For example, in a narrow space, the turning radius is small, and the first and second drive wheels 401, 402 are adjusted to a smaller distance to facilitate turning. In a larger space, a larger turning radius is possible, and the first and second drive wheels 401, 402 can be adjusted to a larger distance to maintain both steering and support stability. After the distance between the first and second drive wheels 401, 402 is adjusted to the appropriate distance, the operator grasps and rotates the operating lever. Rotating the operating lever causes the first and second wheel frames 301, 302 to rotate, thereby turning.

[0032] Among them, the first wheel frame 301 and the second wheel frame 302 are both driving wheels, and hub motors can be selected to facilitate driving, and the speeds of the first wheel frame 301 and the second wheel frame 302 can be controlled separately to meet the needs of differential steering.

[0033] The differential steering structure enables the stacker truck to steer flexibly in confined spaces, avoiding the steering difficulties associated with traditional mechanical steering systems. Furthermore, the operator can adjust the wheelbase of the first and second drive wheels 401, 402 using the wheelbase adjustment assembly 600, improving steering adaptability. Using a smaller wheelbase of the first and second drive wheels 401, 402 makes turning easier in confined spaces, thereby improving operational efficiency.

[0034] The wheelbase adjustment assembly allows for flexible adjustment of the wheelbase to suit different turning radius requirements. Whether manual or electric, this provides convenience for the operator. This adjustable wheelbase design improves the stacker's adaptability to different turning radii.

[0035] In some examples, such as Figure 5 As shown, the vehicle frame 100 further includes a rotating member 700 , which is rotatably mounted on the vehicle frame 100 , the operating lever 200 is mounted on the rotating member 700 , and the wheelbase adjustment assembly 600 is mounted on the vehicle frame 100 or on the rotating member 700 .

[0036] The rotating member 700 may be a disc-shaped structure, rotatably disposed on the vehicle frame 100 via a bearing, so that the rotating member 700 can rotate smoothly around the vehicle frame 100 and can withstand the large axial force generated by the operating lever 200 during steering operation.

[0037] The operating lever 200 can be vertically welded to the center of the upper surface of the rotating member 700, ensuring that the rotation center of the operating lever 200 coincides with the rotation center of the rotating member 700. The welds undergo non-destructive testing to ensure the strength and reliability of the connection. When the wheelbase adjustment assembly 600 is mounted on the vehicle frame 100, a handwheel adjustment mechanism can be used. When the operator turns the handwheel, the first and second wheel frames 301, 302 slide within the guide grooves, achieving wheelbase adjustment.

[0038] If the wheelbase adjustment assembly 600 is mounted on the rotating member 700, an electric push rod adjustment mechanism can be used. The operator operates a control button to control the extension and retraction of the electric push rod. The push rod drives the slider on the guide rail, which in turn pushes the first and second wheel frames 301, 302 to slide within the guide grooves, achieving wheelbase adjustment. This method is more convenient and allows for synchronous adjustment of the wheelbase with the rotation of the operating lever 200.

[0039] Rotating member 700 provides a stable rotational platform for operating lever 200. This design allows for smoother steering of operating lever 200, reducing the potential for wobble and instability associated with direct connection to vehicle frame 100. Furthermore, the disc structure of rotating member 700 effectively disperses the force transmitted by operating lever 200, enhancing the reliability of the entire steering system.

[0040] In some examples, such as Figure 3 、 Figure 5 and Figure 7 As shown, the wheelbase adjustment assembly 600 includes a first pushing member 601, which is disposed on the rotating member 700 or the operating lever 200 and rotates therewith. The first pushing member 601 has a first pushing surface 6011, and the first wheel frame 301 has a first pushed surface 3011. The first pushing surface 6011 abuts against the first pushed surface 3011, and is used to push the first wheel frame 301 toward the second wheel frame 302. The second pushing member 602 is disposed on the rotating member 700 or the operating lever 200 and rotates therewith. The first pushing member 601 has a second pushing surface 6021, and the second wheel frame 302 has a second pushed surface 3021. The second pushing surface 6021 abuts against the second pushed surface 3021, and is used to push the second wheel frame 302 toward the first wheel frame 301. One end of the first elastic member 501 acts on the first wheel frame 301, and the other end acts on the bottom of the first guide groove 201, for providing a force to move the first wheel frame 301 away from the second wheel frame 302. One end of the second elastic member 502 acts on the second wheel frame 302, and the other end acts on the bottom of the second guide groove 202, for providing a force to move the second wheel frame 302 away from the first wheel frame 301.

[0041] The first and second pushing members 601, 602 can be block-shaped structures, fixed to the surface of the rotating member 700, and rotate synchronously with the rotating member 700. The first pushing surface 6011 of the first pushing member 601 and the second pushing surface 6021 of the second pushing member 602 are inclined or spiral surfaces, which can more effectively convert the rotational motion of the rotating member 700 into movement of the first and second wheel frames 301, 302 when the rotating member 700 rotates. The first pushed surface 3011 of the first wheel frame 301 and the second pushed surface 3021 of the second wheel frame 302 are adapted to the shapes of the corresponding pushing surfaces, ensuring good contact during abutment and stable force transmission.

[0042] The edges of the first pushed surface 3011 of the first wheel frame 301 and the second pushed surface 3021 of the second wheel frame 302 are rounded to prevent stress concentration when the pushed surfaces come into contact with the pushing surfaces.

[0043] The first elastic member 501 and the second elastic member 502 are compression springs, one end of which is fixed to one side of the first wheel frame 301 and the second wheel frame 302 close to the bottom of the guide groove, and the other end of which abuts against the bottom of the guide groove.

[0044] When the rotating member 700 rotates, the first pushing member 601 and the second pushing member 602 mounted thereon rotate accordingly. Because the first pushing surface 6011 abuts the first pushed surface 3011, and the second pushing surface 6021 abuts the second pushed surface 3021, and the pushing surfaces are inclined, the rotation of the rotating member 700 causes the first pushing member 601 and the second pushing member 602 to push the first wheel frame 301 and the second wheel frame 302 toward each other, thereby reducing the wheelbase. The first elastic member 501 and the second elastic member 502 continuously provide a force that pushes the first wheel frame 301 and the second wheel frame 302 away from each other.

[0045] When the rotating member 700 rotates in the opposite direction or stops rotating, the first wheel frame 301 and the second wheel frame 302 move away from each other under the action of the elastic member, thereby increasing the wheelbase. This design controls the wheelbase by the rotation direction and angle of the rotating member 700, meeting the needs of different working scenarios.

[0046] When turning, it is necessary to rotate the operating lever 200 to steer the first drive wheel 401 and the second drive wheel 402. During this process, the rotation of the operating lever 200 will cause one or both of the first wheel frame 301 and the second wheel frame 302 to move to the middle position, and the distance between the first drive wheel 401 and the second drive wheel 402 will also change direction, which is more conducive to turning. When going straight, the operating lever 200 is operated to reset, and the first wheel frame 301 and the second wheel frame 302 are reset under the action of the first elastic member 501 and the second elastic member 502, and the first drive wheel 401 and the second drive wheel 402 are also restored to the maximum distance to ensure that going straight is more stable.

[0047] The first and second elastic members 501 and 502 not only assist in adjusting the wheelbase, but also provide force balancing and stabilization throughout the entire process. During the stacker's travel and steering, the elastic members cushion the impact of road surface irregularities and other maneuvers, ensuring smoother movement of the first and second wheel frames 301 and 302. Furthermore, the opposing force provided by the elastic members ensures the reversibility and precision of wheelbase adjustment, allowing for flexible adjustment based on actual needs and maintaining stability after adjustment.

[0048] In some examples, such as Figure 3 、 Figure 5 and Figure 7 As shown, the first pushed surface 3011 and the second pushed surface 3021 are both cam surfaces, and the first pushing surface 6011 and the second pushing surface 6021 are both cylindrical surfaces, which are used to push the first wheel frame 301 to move after the first pushing member 601 rotates, and to push the second wheel frame 302 to move after the second pushing member 602 rotates.

[0049] The first pushed surface 3011 , as a part of the first wheel frame 301 , may be a cam surface. When the rotating member 700 drives the first pushing member 601 to rotate, the cam surface enables the first wheel frame 301 to move smoothly in the first guide groove 201 .

[0050] The second pushed surface 3021 is also a cam surface structure. When the rotating member 700 drives the second pushing member 602 to rotate, the cam surface can enable the second wheel frame 302 to move smoothly in the second guide groove 202 .

[0051] The first pushing surface 6011 is a cylindrical surface, and the diameter of the cylindrical surface is determined according to the matching requirements with the first pushed surface 3011 to ensure that it always maintains good contact with the first pushed surface 3011 during the pushing process.

[0052] The second pushing surface 6021 is also a cylindrical surface. The design of the cylindrical surface can provide a stable and uniform thrust when pushing the second wheel frame 302 , thereby ensuring the movement of the second wheel frame 302 in the second guide groove 202 .

[0053] When the rotating member 700 rotates, it drives the first and second pushing members 601 and 602 to rotate synchronously. The cylindrical first pushing surface 6011 of the first pushing member 601 contacts the cam-shaped first pushed surface 3011 of the first wheel carrier 301, pushing the first wheel carrier 301. During rotation, the first pushing surface 6011 controls the movement distance and speed of the first wheel carrier 301 within the first guide groove 201 based on the lift of the cam surface. Similarly, the cylindrical second pushing surface 6021 of the second pushing member 602 cooperates with the cam-shaped second pushed surface 3021 of the second wheel carrier 302, pushing the second wheel carrier 302 within the second guide groove 202. In this way, the wheelbase is adjusted. Simultaneously, the first and second elastic members 501 and 502 provide a reverse elastic force, helping the first and second wheel carriers 301 and 302 return to their corresponding positions when the rotating member 700 stops rotating or rotates in the reverse direction, thus enabling flexible adjustment of the wheelbase.

[0054] The cylindrical design of the first pushing surface 6011 and the second pushing surface 6021 maintains a large contact area with the cam surface during the pushing process, evenly distributing the thrust across the cam surface and avoiding localized stress concentration. This uniform force transmission ensures smooth movement of the first and second wheel frames 301, 302, reducing component wear and deformation caused by uneven force.

[0055] In some examples, such as Figure 5 As shown, the first wheel frame 301 has a first guide portion 3012 , and the second wheel frame 302 has a second guide portion 3022 . The first guide portion 3012 is slidably disposed in the first guide groove 201 , and the second guide portion 3022 is slidably disposed in the second guide groove 202 .

[0056] The first guide portion 3012 is designed as a D-shaped sliding block structure adapted to the D-shaped groove structure of the first guide groove 201 , and is located on the side where the first wheel frame 301 contacts the first guide groove 201 .

[0057] The second guide portion 3022 has a similar structure to the first guide portion 3012 and is also a D-shaped slider structure adapted to the second guide groove 202 . The second guide portion 3022 is located on the side where the second wheel frame 302 contacts the second guide groove 202 .

[0058] The provision of the first guide portion 3012 and the second guide portion 3022 does not affect the pushing effect of the first pushing member 601 and the second pushing member 602 on the first wheel frame 301 and the second wheel frame 302. The first pushing surface 6011 of the first pushing member 601 abuts against the first pushed surface 3011 of the first wheel frame 301, and the second pushing surface 6021 of the second pushing member 602 abuts against the second pushed surface 3021 of the second wheel frame 302. When the rotating member 700 drives the first pushing member 601 and the second pushing member 602 to rotate, the first wheel frame 301 and the second wheel frame 302, guided by the guide portions, move smoothly along the guide grooves to achieve wheelbase adjustment.

[0059] The first and second guide portions 3012 and 3022 cooperate with the corresponding first and second guide grooves 201 and 202 to guide the movement of the first and second wheel frames 301 and 302. The D-shaped groove structure and the corresponding slider guides restrict the horizontal movement of the wheel frames, forcing them to slide only along the guide grooves. This ensures accurate and stable movement during wheelbase adjustment. This guidance prevents wheel frame deviation or shaking during movement, improving the reliability of the stacker's steering system.

[0060] In some examples, the first guide portion 3012 has a third guide groove (not shown in the figures), and the second guide portion 3022 slides in the third guide groove at the same time.

[0061] A third guide groove is machined in the middle of the first guide portion 3012 , and the third guide groove can provide a stable sliding guide for the second guide portion 3022 of the second wheel frame 302 to prevent it from disengaging during the sliding process.

[0062] When the rotating member 700 drives the first and second pushing members 601 and 602 to rotate, the first pushing member 601 pushes the first wheel frame 301 via its first pushing surface 6011, causing the first guide portion 3012 to slide within the first guide groove 201. Simultaneously, the second pushing member 602 pushes the second wheel frame 302 via its second pushing surface 6021, causing the second guide portion 3022 to slide within the third guide groove. As the second guide portion 3022 slides within the third guide groove, it guides the second wheel frame 302, ensuring more coordinated movement with the first wheel frame 301 and smooth wheelbase adjustment.

[0063] By providing a third guide groove in the first guide portion 3012 and allowing the second guide portion 3022 to slide therein, an additional guide constraint is provided for the movement of the second wheel frame 302. This design allows the movement of the first wheel frame 301 and the second wheel frame 302 to be more coordinated during the wheelbase adjustment process, ensuring the accuracy of their relative positions.

[0064] In some examples, such as Figure 3 、 Figure 5 and Figure 7 As shown, guide wheels 800 are also included, and several guide wheels 800 are provided on the first pushing surface 6011 and the second pushing surface 6021.

[0065] On the first pushing surface 6011 and the second pushing surface 6021, a number of guide wheels 800 are evenly arranged according to the force distribution and pushing requirements, for example, arranged in a matrix form on each pushing surface. After the guide wheels 800 are installed, the overall shape of the first pushing surface 6011 and the second pushing surface 6021 is adaptively adjusted. The pushing surface is designed as a slightly curved surface to better align with the first pushed surface 3011 of the first wheel frame 301 and the second pushed surface 3021 of the second wheel frame 302, ensuring that the guide wheels maintain good contact with the pushed surfaces during the pushing process. The curvature of the curved surface is precisely designed based on the shape of the pushed surface and the distribution of the guide wheels, ensuring uniform force transmission during the pushing process.

[0066] When the rotating member 700 drives the first and second pushing members 601 and 602 to rotate, the guide wheels 800 roll on the first and second pushed surfaces 3011 and 3021. The rolling of the guide wheels reduces frictional resistance between the first and second pushing surfaces 6011 and 6021, and the pushed surfaces, thereby facilitating smoother movement of the first and second wheel frames 301 and 302. Furthermore, the provision of the guide wheels does not affect the pushing action of the first and second pushing members 601 and 602 on the wheel frames, allowing them to effectively move the wheel frames to adjust the wheelbase.

[0067] Guide wheels 800 are installed on the first and second pushing surfaces 6011 and 6021, converting sliding friction into rolling friction. The coefficient of rolling friction is much smaller than the coefficient of sliding friction, significantly reducing the friction between the first and second pushing members 601 and 602 and the pushed surfaces of the wheel frame during the pushing process. This makes wheelbase adjustment easier, reduces energy loss, and improves the efficiency of the stacker's steering system.

[0068] Guidance and Stability Principle: During rolling, the guide wheels 800 guide the pushing direction of the first and second pushers 601 and 602. Especially during wheel carrier movement, the guide wheels adapt to the changing shape of the pushed surface, ensuring stability during the pushing process. Multiple guide wheels are evenly distributed across the pushing surface, ensuring a more uniform transfer of thrust to the wheel carrier. This prevents deformation or damage to the wheel carrier caused by localized excessive force, further enhancing the stability and reliability of the wheelbase adjustment process.

[0069] In some examples, the positions of the first pushing surface 6011 and the first pushed surface 3011 and the positions of the second pushing surface 6021 and the second pushed surface 3021 are configured so that when the operating lever 200 rotates clockwise, the first pushed surface 3011 approaches and pushes the first pushing surface 6011, so that the first wheel frame 301 approaches the second wheel frame 302; when it rotates counterclockwise, the second pushed surface 3021 approaches and pushes the second pushing surface 6021, so that the second wheel frame 302 approaches the first wheel frame 301.

[0070] The first pushing member 601 is fixed to the rotating member 700. Initially, a certain distance is maintained between the first pushing surface 6011 and the first pushed surface 3011. This distance ensures smooth contact and force transmission between the two when the operating lever 200 rotates, while also preventing unnecessary friction when not in operation. When the operating lever 200 rotates clockwise, the rotating member 700 drives the first pushing member 601, causing the first pushing surface 6011 to gradually approach and contact the first pushed surface 3011, thereby pushing the first wheel frame 301 toward the second wheel frame 302.

[0071] The second pushing member 602 is also fixed to the rotating member 700 and is positioned opposite the first pushing member 601. Initially, the second pushing surface 6021 maintains a predetermined distance from the second pushed surface 3021. When the operating lever 200 rotates counterclockwise, the rotating member 700 drives the second pushing member 602 to rotate, causing the second pushing surface 6021 to gradually approach and contact the second pushed surface 3021, thereby pushing the second wheel frame 302 toward the first wheel frame 301.

[0072] The operating lever 200 is rotatably connected to the vehicle frame 100 via a thrust ball bearing and is vertically fixed to the center of the rotating member 700. When the operator rotates the operating lever 200, the rotating member 700 rotates accordingly, thereby driving the first and second pushing members 601, 602 to rotate, pushing the first and second wheel frames 301, 302, and thus adjusting the wheelbase.

[0073] By designing the first pushing surface 6011, the first pushed surface 3011, the second pushing surface 6021, and the second pushed surface 3021 as planes with specific inclination angles and rationally configuring their relative positions, the operating lever 200 is used to rotate the rotating member 700, so that the pushing surface of the pushing member contacts the pushed surface of the wheel frame and transmits force, thereby achieving wheelbase adjustment. When the operating lever 200 rotates clockwise, the first wheel frame 301 approaches the second wheel frame 302 under the action of the first pushing member 601, and the second wheel frame 302 moves away from the first wheel frame 301 under the action of the second pushing member 602; when it rotates counterclockwise, the second wheel frame 302 approaches the first wheel frame 301 under the action of the second pushing member 602, and the first wheel frame 301 moves away from the second wheel frame 302 under the action of the first pushing member 601. This reduces the distance between the first drive wheel 401 and the second drive wheel 402, which is achieved by the first drive wheel 401 approaching the second drive wheel 402, or the second drive wheel 402 approaching the first drive wheel 401, rather than by the first drive wheel 401 and the second drive wheel 402 approaching each other. This design makes the wheelbase adjustment operation simple and intuitive, simplifies the overall structure, and prevents the operating lever 200 from being stuck when rotating clockwise or counterclockwise.

[0074] In some examples, such as Figure 3 、 Figure 5 and Figure 7 As shown, the first wheel frame 301 and the second wheel frame 302 both include a first frame body 310, the first frame body 310 is slidably set in the first guide groove 201 or the second guide groove 202, the second frame body 320 is hingedly set on the first frame body 310, the first driving wheel 401 and the second driving wheel 402 are set on the second frame body 320, and the spring shock absorber 330 is set on the first frame body 310 and the second frame body 320.

[0075] The outer contour of the first frame 310 matches the first guide groove 201 or the second guide groove 202 on the operating lever 200, allowing the first frame 310 to slide smoothly within the guide groove. One end of the second frame 320 is hinged to the first frame 310, and the first drive wheel 401 or the second drive wheel 402 is mounted on the bottom of the second frame 320.

[0076] The spring damper 330 can be a coil spring damper, one end of which can be hinged to the top of the first frame 310 and the other end can be hinged to the second frame 320. The hinge allows the spring damper to move within a certain angle range, ensuring that the spring damper can still effectively perform its shock absorption function when the second frame 320 rotates relative to the first frame 310.

[0077] When the stacker is traveling on an uneven road, the second frame 320 will move up and down with the ups and downs of the road. The spring of the spring shock absorber 330 is compressed or stretched, and the elastic deformation of the spring absorbs and buffers the vibration energy, reducing the vibration transmitted to the frame and the operator, thereby improving the stability and comfort of the stacker's driving.

[0078] The adaptive design of the first frame 310 and the guide groove ensures stable sliding of the wheel frame on the operating rod 200, enabling wheelbase adjustment. The articulated structure of the second frame 320 and the first frame 310 enables flexible steering of the drive wheels, meeting the steering requirements of the stacker in different scenarios. This two-stage frame design ensures the overall strength of the wheel frame while providing steering flexibility.

[0079] The spring damper 330 utilizes the elastic properties of a spring. When the second frame 320 vibrates due to uneven road conditions during the stacker's operation, the spring in the spring damper 330 deforms, converting the mechanical energy of the vibration into elastic potential energy, thereby reducing the impact of the vibration on other components of the stacker and the operator. The ball joint design ensures that the spring damper 330 can still function properly during steering, without affecting steering flexibility.

[0080] This embodiment further provides a steering drive method, in which the distance between the first driving wheel 401 and the second driving wheel 402 of the stacker is reduced to perform steering when the stacker is turning.

[0081] In some examples, the operator climbs into the driver's seat, fastens his seat belt, and turns on the power to activate the stacker's power system. After observing the dashboard indicators and confirming that all systems are functioning normally, the operator releases the parking brake, moves the forward / reverse joystick to the forward or reverse position, and lightly steps on the accelerator pedal. The stacker begins moving, driven by the first drive wheel 401 and the second drive wheel 402.

[0082] When traveling in a straight line, the operator observes the vehicle's direction and surroundings and fine-tunes the forward and reverse joysticks to ensure the vehicle remains in a straight line. The operator also monitors the speed and battery level displayed on the instrument panel to ensure proper operation. If the vehicle's direction deviates, the operator fine-tunes joystick 200, using the differential steering system to adjust the speed of the first and second drive wheels 401, 402 to restore the vehicle to a straight trajectory.

[0083] When turning is required, the operator rotates the operating lever 200. The operating lever drives the rotating member 700 to rotate, thereby rotating the first pushing member 601 and the second pushing member 602. For example, if the operating lever 200 is rotated clockwise, the first pushing surface 6011 of the first pushing member 601 contacts the first pushed surface 3011 of the first wheel frame 301 and pushes the first wheel frame 301 closer to the second wheel frame 302; if it is rotated counterclockwise, the second pushing surface 6021 of the second pushing member 602 contacts the second pushed surface 3021 of the second wheel frame 302 and pushes the second wheel frame 302 closer to the first wheel frame 301, reducing the distance between the first drive wheel 401 and the second drive wheel 402. When turning, the distance between the first drive wheel 401 and the second drive wheel 402 is reduced to turn, so that when turning in a narrow space, the space is limited and the turning radius is smaller, and fast and efficient turning can be achieved.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all of these should be included in the scope of the claims of the present disclosure.

Claims

1. A stacker truck based on dual-drive steering function, characterized in that: include: A vehicle frame (100), wherein the bottom of the vehicle frame (100) has a front wheel set (101) and a rear wheel set (102); An operating rod (200), the operating rod (200) being rotatably arranged relative to the vehicle frame (100), and having a first guide groove (201) and a second guide groove (202) on both sides of a lower portion, wherein the directions of the first guide groove (201) and the second guide groove (202) are both horizontal; a first wheel frame (301) and a second wheel frame (302), wherein the first wheel frame (301) is slidably disposed in the first guide groove (201), and the second wheel frame (302) is slidably disposed in the second guide groove (202); A first driving wheel (401) and a second driving wheel (402), wherein the first driving wheel (401) and the second driving wheel (402) are respectively arranged on the first wheel frame (301) and the second wheel frame (302); A wheelbase adjustment assembly (600) is provided on the vehicle frame (100) or indirectly on the operating rod (200) and is used to adjust the sliding positions of the first wheel frame (301) and the second wheel frame (302) in the first guide groove (201) and the second guide groove (202).

2. A stacker truck based on dual-drive steering function according to claim 1, characterized in that: Also includes: A rotating member (700) is rotatably arranged on the vehicle frame (100), the operating lever (200) is arranged on the rotating member (700), and the wheelbase adjustment assembly (600) is arranged on the vehicle frame (100) or on the rotating member (700).

3. A stacker truck based on dual-drive steering function according to claim 2, characterized in that: The wheelbase adjustment assembly (600) comprises: a first pushing member (601), the first pushing member (601) being arranged on the rotating member (700) or the operating rod (200) and rotating therewith, having a first pushing surface (6011), the first wheel frame (301) having a first pushed surface (3011), the first pushing surface (6011) being in contact with the first pushed surface (3011), and being used to push the first wheel frame (301) so as to move toward the second wheel frame (302); a second pushing member (602), the second pushing member (602) being arranged on the rotating member (700) or the operating rod (200) and rotating therewith, and having a second pushing surface (6021); the second wheel frame (302) having a second pushed surface (3021); the second pushing surface (6021) being in contact with the second pushed surface (3021), and being used to push the second wheel frame (302) so as to move toward the first wheel frame (301); A first elastic member (501) and a second elastic member (502), wherein one end of the first elastic member (501) acts on the first wheel frame (301) and the other end acts on the bottom of the first guide groove (201) to provide a force for the first wheel frame (301) to move away from the second wheel frame (302); and one end of the second elastic member (502) acts on the second wheel frame (302) and the other end acts on the bottom of the second guide groove (202) to provide a force for the second wheel frame (302) to move away from the first wheel frame (301).

4. A stacker truck based on dual-drive steering function according to claim 3, characterized in that: The first pushed surface (3011) and the second pushed surface (3021) are both cam surfaces, and the first pushing surface (6011) and the second pushing surface (6021) are both cylindrical surfaces, which are used to enable the first pushing member (601) to push the first wheel frame (301) to move after rotation, and to enable the second pushing member (602) to push the second wheel frame (302) to move after rotation.

5. The stacker truck based on dual-drive steering function according to claim 3, characterized in that: The first wheel frame (301) has a first guide portion (3012), and the second wheel frame (302) has a second guide portion (3022). The first guide portion (3012) is slidably disposed in the first guide groove (201), and the second guide portion (3022) is slidably disposed in the second guide groove (202).

6. The stacker truck based on dual-drive steering function according to claim 3, characterized in that: The first guide portion (3012) has a third guide groove, and the second guide portion (3022) slides in the third guide groove at the same time.

7. The stacker truck based on dual-drive steering function according to claim 3, characterized in that: Also includes: Guide wheels (800), a plurality of guide wheels (800) are provided on both the first pushing surface (6011) and the second pushing surface (6021).

8. The stacker truck based on dual-drive steering function according to claim 3, characterized in that: The positions of the first pushing surface (6011) and the first pushed surface (3011) as well as the positions of the second pushing surface (6021) and the second pushed surface (3021) are configured so that when the operating lever (200) rotates clockwise, the first pushed surface (3011) approaches and pushes the first pushing surface (6011), so that the first wheel frame (301) approaches the second wheel frame (302); and when the operating lever (200) rotates counterclockwise, the second pushed surface (3021) approaches and pushes the second pushing surface (6021), so that the second wheel frame (302) approaches the first wheel frame (301).

9. The stacker truck based on dual-drive steering function according to claim 3, characterized in that: The first wheel frame (301) and the second wheel frame (302) both include: a first frame (310), wherein the first frame (310) is slidably disposed in the first guide groove (201) or the second guide groove (202); a second frame (320), the second frame (320) being hingedly mounted on the first frame (310), the first driving wheel (401) and the second driving wheel (402) being mounted on the second frame (320); A spring shock absorber (330) is provided between the first frame (310) and the second frame (320).

10. A steering driving method, using a stacker truck based on dual-drive steering function according to any one of claims 1 to 9, characterized in that: When the first drive wheel (401) and the second drive wheel (402) of the stacker are turning, the distance between the first drive wheel (401) and the second drive wheel (402) is reduced to perform the turning.

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