Lifting chassis for transport vehicle and transport vehicle

Abstract

The invention discloses a lifting chassis for a transport vehicle and the transport vehicle, relates to the technical field of transport vehicles, and solves the technical problems that in the prior art, the height of a chassis of the transport vehicle cannot be adjusted, stability is poor when loads are increased, and supporting force and flexibility are insufficient during rapid movement or sharp turning. The lifting chassis for the transport vehicle comprises a multi-connecting-rod mechanism, a transmission mechanism, a damping mechanism, a transmission platform and an electrical platform which are symmetrically arranged, the electrical platform is fixedly arranged above the transmission platform through a vertically-arranged fixing plate, the transmission mechanism comprises a driving transmission rod, and the driving transmission rod is transversely installed at the top of the transmission platform; the two sides of the transmission platform are further provided with driven transmission rods matched with the driving transmission rods, the two ends of each driven transmission rod are provided with threads and are provided with driving nuts matched with the threads, and the top of the electrical platform is provided with a first motor opposite to the driving transmission rods. The driving transmission rod is in transmission with the driven transmission rod and the first motor through a transmission belt.

Description

Technical Field

[0001] The present invention relates to the technical field of transport vehicles, in particular to a lifting chassis for a transport vehicle and a transport vehicle. Background Art

[0002] With the rapid development of the logistics industry, transport vehicles are widely used in all aspects of the industry, including not only on-road freight vehicles but also in warehouses and freight yards. The chassis of a transport vehicle serves as the fundamental platform for its movement and mission execution. The advancement and functionality of its design directly impact the overall performance and application range of the transport vehicle. Currently, the mainstream transport vehicle chassis on the market generally adopt a fixed-height design, but this design has exposed many limitations in practical applications.

[0003] Specifically, as the load on the chassis increases, the fixed-height design can easily lead to an imbalance in overall stability, increasing the risk of the transporter tipping over or losing control. Furthermore, in complex and changing environments, such as those requiring rapid movement or sharp turns, the fixed-height chassis lacks sufficient support and flexibility, severely restricting the transporter's maneuverability.

[0004] For this reason, it is urgent to design a lifting chassis for a transport vehicle that can adjust the chassis height through a mechanical mechanism. Summary of the Invention

[0005] In response to the shortcomings and deficiencies in the prior art, the present invention provides a lifting chassis for transport vehicles with an ingenious structural design and coordinated work of a transmission mechanism, a multi-link mechanism and a shock-absorbing mechanism. The driving nut moves linearly inward or outward along the driven rod, driving the multi-link mechanism to move in a linked manner, thereby raising or lowering the lifting chassis with high efficiency and high stability, realizing flexible adjustment of the chassis height and having a wide range of application scenarios.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A lifting chassis for a transport vehicle includes a multi-link mechanism, a transmission mechanism, a shock absorbing mechanism, a transmission platform, and an electrical platform that are symmetrically arranged. The electrical platform is fixed above the transmission platform through a vertically arranged fixing plate; The transmission mechanism includes an active transmission rod, which is horizontally installed on the top of the transmission platform. Driven transmission rods matching the active transmission rod are also installed on both sides of the transmission platform. Both ends of the driven transmission rod are respectively provided with threads and drive nuts matching them. A first motor is provided on the top of the electrical platform and is arranged opposite to the active transmission rod. The active transmission rod is respectively connected to the driven transmission rod and the first motor through a transmission belt. The shock absorbing mechanism is slidably and symmetrically installed at both ends of the transmission platform; The multi-link mechanism comprises a plurality of connecting rods hinged to each other, and the multi-link mechanism is respectively connected to the drive nut and the shock absorbing mechanism; When the first motor drives the driven transmission rod to rotate forward and reverse, the driving nut moves linearly inward or outward along the driven transmission rod, driving the multi-link mechanism to move in a linkage manner.

[0007] Preferably, the shock absorbing mechanism includes a transversely arranged sliding member and an elastic member matched therewith; The two ends of the transmission platform are symmetrically provided with slide grooves matching the sliding parts, the upper and lower sides of the slide groove are penetrated with notches, and the front and rear inner walls of the slide groove are symmetrically provided with slideways; The sliding member includes a first sliding member and a second sliding member, and the elastic member includes a first spring and a second spring; A first sliding member is slidably provided on one end of the sliding groove at one side close to the multi-link mechanism, and a second sliding member is slidably provided on the other end of the sliding groove at a side opposite to the first sliding member.

[0008] Preferably, the first sliding member includes a first slider body matching the slideway, one end of the first slider body abuts against the bottom wall of the slideway, and the other end is provided with a sliding sleeve; The second sliding member includes a second slider body. A sliding rod is provided on the second slider body on the side opposite to the sliding sleeve. The sliding rod can be slidably installed inside the sliding sleeve. The first spring is sleeved on the outside of the sliding sleeve. One end of the first spring is fixedly connected to the first slider body, and the other end is fixedly connected to the second slider body.

[0009] Preferably, the multi-link mechanism includes an L-shaped lifting rod, which is vertically mounted on the outside of the driven transmission rod, a vertical connecting rod is provided on the outside of the bottom of the driving nut, and a transverse moving rod is provided at the bottom of the vertical connecting rod; A vertical connecting block is provided on the top of the second slider body. The vertical connecting block passes upward through the notch and is fixed to one end of the second spring. The other end of the second spring is fixed to the vertical connecting rod.

[0010] Preferably, the multi-link mechanism further includes a first link group and a second link group; The first connecting rod group includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are parallel to each other and are arranged obliquely and on the same plane; A hinged connector is provided at the bottom of the first slider, which passes downward through the notch and is hinged to one end of the first connecting rod and the second connecting rod respectively. The other ends of the first connecting rod and the second connecting rod are respectively hinged to the transverse connecting rod of the L-shaped lifting rod; The second connecting rod group includes a third connecting rod and a fourth connecting rod. The third connecting rod and the fourth connecting rod are parallel to each other, inclined and located on the same plane. One end of the third connecting rod and the fourth connecting rod are respectively hinged to the transverse moving rod, and the other ends are respectively hinged to the bottom of the first connecting rod and the second connecting rod.

[0011] Preferably, the middle part of the fourth connecting rod is connected with a sleeve through a pin shaft, and the sleeve is sleeved on the vertical long rod of the L-shaped lifting rod. The sleeve can slide up and down along the outer side wall of the vertical rod of the L-shaped lifting rod.

[0012] Preferably, a driving pulley is connected to the output shaft of the first motor, and a transmission belt slot is provided in the middle of the top of the electrical platform; A transversely arranged active transmission rod is fixedly supported by a first support body and located in the middle of the top of the transmission platform. A set of active pulleys are rotatably connected to the outer side of the active transmission rod at even intervals. The active pulleys include a first active pulley located in the middle of the active transmission rod and connected to the active transmission rod on both sides of the first active pulley. The transmission belt includes a first transmission belt and a second transmission belt. After the first transmission belt is connected to the driving pulley, it passes vertically downward through the transmission belt slot and is connected to the first active pulley.

[0013] Preferably, driven transmission rods are symmetrically supported by second supporting bodies on both sides of the active transmission rod and on the front and rear side walls of the top of the transmission platform; The driven transmission rod is symmetrically provided with driven pulleys that match the second driving pulleys. The two second driving pulleys are respectively connected to the two driven pulleys through the second transmission belt.

[0014] Preferably, a motor connecting plate is fixedly provided at the bottom of the transverse connecting rod of the L-shaped lifting rod, a transversely arranged second motor is connected to the motor connecting plate, and a Mecanum wheel matching the second motor is rotatably connected to the output shaft of the second motor.

[0015] The present invention also provides a transport vehicle, which is provided with the above-mentioned lifting chassis for the transport vehicle.

[0016] The present invention provides a lifting chassis for a transport vehicle and a transport vehicle, which have the following beneficial effects: (1) The lifting chassis for transport vehicles of the present invention has an ingenious mechanical structure design. The transmission mechanism, multi-link mechanism and shock-absorbing mechanism work together. By driving the nut to move linearly inward or outward along the driven transmission rod, the sleeve is driven to slide up and down on the outer wall of the L-shaped lifting rod, so that the entire lifting chassis moves up or down, realizing flexible adjustment of the height of the transport vehicle chassis. At the same time, during the lifting process, the sliding part of the shock-absorbing mechanism will slide in the slide groove, and the elastic part will be compressed or stretched under the drive of the multi-link mechanism, thereby absorbing and buffering part of the vibration energy, reducing the interference of uneven ground or obstacles on the driving stability of the lifting chassis. This mutually coordinated working mode realizes efficient and stable lifting of the lifting chassis, so that the transport vehicle can adjust its own height according to actual conditions when facing different terrains and obstacles, thereby enhancing its adaptability to complex environments and improving work efficiency and safety.

[0017] (2) The lifting chassis for transport vehicles of the present invention ensures stability and synchronization during the lifting process through the linkage mechanism of the threaded nut and the multi-link. Whether increasing the load or performing rapid movement, the chassis can be kept stable, effectively reducing the risk of the transport vehicle tipping over or losing control. At the same time, the entire lifting device has a compact structure and a reasonable layout of various components, which facilitates integration with other systems of the transport vehicle. This helps to reduce the overall size and weight of the transport vehicle, improves the flexibility of the transport vehicle, and facilitates use in a variety of situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of an embodiment of the present invention; Figure 2 for Figure 1 a partial sectional view of the main view; Figure 3 It is a left side view of an embodiment of the present invention; Figure 4 A top view of an embodiment of the present invention without an electrical platform installed; Figure 5 This is a schematic diagram of the entire multi-link mechanism of an embodiment of the present invention, in which the multi-link mechanism contracts and drives the lifting chassis to rise; Figure 6 This is a partial view of a shock absorbing mechanism according to an embodiment of the present invention installed on a lifting platform; Figure 7 for Figure 5 EE cross-sectional view; Figure 8 This is a schematic diagram of the entire multi-link mechanism of an embodiment of the present invention, in which the multi-link mechanism extends and links to drive the lifting chassis to descend.

[0019] Figure: 1, electrical platform; 101, first motor; 102, driving pulley; 2, driven transmission rod; 201, driving nut; 202, second support; 203, driven pulley; 3, driving transmission rod; 301, first support; 302, second driving pulley; 303, first driving pulley; 401, first connecting rod; 402, second connecting rod; 403, third connecting rod; 404, fourth connecting rod; 405, transverse movement rod ; 406, L-shaped lifting rod; 407, sleeve; 408, limit ring; 409, vertical connecting rod; 501, second motor; 502, Mecanum wheel; 6, transmission platform; 701, first sliding member; 7011, first slider; 7012, sliding sleeve; 702, second sliding member; 7021, second slider; 7022, sliding rod; 7023, vertical connecting block; 703, first spring; 704, second spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the present invention, unless otherwise expressly specified or limited, the terms "connection" and "fixed" should be understood in a broad sense. 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 elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0022] See also Figure 1-Figure 7 , the present invention provides a technical solution: First, if Figure 1-4As shown, the lifting chassis for transport vehicles provided by the present invention includes a multi-link mechanism, a transmission mechanism, a shock absorbing mechanism, a transmission platform 6 and an electrical platform 1 that are symmetrically arranged. The electrical platform 1 is fixed on the top of the transmission platform 6 by a vertically arranged fixing plate. The transmission mechanism includes an active transmission rod 3, which is horizontally installed on the top of the transmission platform 6. A driven transmission rod 2 that matches the active transmission rod 3 is also installed on both sides of the transmission platform 6. The two ends of the driven transmission rod 2 are respectively provided with threads and driving nuts 201 that match them. A first motor 101 is provided on the top of the electrical platform 1, which is arranged opposite to the active transmission rod 3. The active transmission rod 3 is respectively driven by the driven transmission rod 2 and the first motor 101 through a transmission belt. The shock absorbing mechanism is slidably and symmetrically installed on the two ends of the transmission platform 6; the multi-link mechanism is a plurality of connecting rods hinged to each other, and the multi-link mechanism is respectively connected to the driving nut 201 and the shock absorbing mechanism. When the first motor 101 drives the driven transmission rod 2 to rotate forward and reverse, the driving nut 201 moves linearly inward or outward along the driven transmission rod 2, driving the multi-link mechanism to move in a linkage manner.

[0023] In the above structural design, the transmission mechanism, the multi-link mechanism, and the shock-absorbing mechanism work in coordination. When the first motor 101 rotates forward or reverse, the active transmission rod 3 drives the driven transmission rod 2 to rotate, so that the drive nut 201 will move linearly along the driven transmission rod 2, that is, move inward or outward, and push the multi-link mechanism connected thereto to work in conjunction, thereby converting it into the up and down movement of the transmission platform 6, that is, the raising or lowering of the lifting chassis. At the same time, during the lifting process, the shock-absorbing mechanism will absorb and buffer part of the vibration energy, reducing the interference of uneven ground or obstacles on the driving stability of the lifting chassis. This mutually coordinated working mode realizes the efficient and stable lifting of the lifting chassis, so that the transport vehicle can adjust its own height according to actual conditions when facing different terrains and obstacles, thereby enhancing its adaptability to complex environments and improving work efficiency and safety.

[0024] Secondly, if Figure 5-Figure 8 As shown, the shock-absorbing mechanism includes a transversely arranged sliding member and a matching elastic member. Transversely symmetrical grooves matching the sliding members are provided at both ends of the transmission platform 6. Slots are provided on the upper and lower sides of the grooves, and symmetrical slideways are provided on the front and rear inner walls of the grooves. The sliding member includes a first sliding member 701 and a second sliding member 702, and the elastic member includes a first spring 703 and a second spring 704. The first sliding member 701 is slidably provided at one end of the groove, near the side of the multi-link mechanism. The second sliding member 702 is slidably provided at the other end of the groove, opposite the first sliding member 701.

[0025] The first sliding member 701 includes a first slider body 7011 that matches the slideway. One end of the first slider body 7011 abuts the bottom wall of the slideway, and the other end is provided with a sliding sleeve 7012. The second sliding member 702 includes a second slider body 7021. A sliding rod 7022 is further provided on the side of the second slider body 7021 opposite the sliding sleeve 7012. The sliding rod 7022 is slidably mounted inside the sliding sleeve 7012. The first spring 703 is sleeved on the outside of the sliding sleeve 7012. One end of the first spring 703 is fixedly connected to the first slider body 7011, and the other end is fixedly connected to the second slider body 7021.

[0026] The multi-link mechanism includes an L-shaped lifting rod 406, which is vertically mounted on the outside of the driven transmission rod 2. A vertical connecting rod 409 is provided on the outside of the bottom of the drive nut 201. The bottom of the vertical connecting rod 409 is fixed with the lateral movement rod 405. A vertical connecting block 7023 is provided on the top of the second slider body 7021. The vertical connecting block 7023 extends upward through the notch and is fixed to one end of the second spring 704. The other end of the second spring 704 is fixed to the vertical connecting rod 409.

[0027] The multi-link mechanism also includes a first link group and a second link group. The first link group includes a first link 401 and a second link 402. The first link 401 and the second link 402 are parallel to each other, arranged at an angle, and lie in the same plane. A hinged connector is provided at the bottom of the first slider 7011. The hinged connector extends downward through a slot and is hinged to one end of each of the first link 401 and the second link 402. The other ends of the first link 401 and the second link are respectively hinged to the transverse link of the L-shaped lifting rod 406.

[0028] The second linkage assembly includes a third link 403 and a fourth link 404. The third and fourth links 403 and 404 are parallel, inclined, and coplanar. One end of each link is hinged to a transverse movement rod 405, while the other end is hinged to the bottom third of the first link 401 and the second link 402, respectively. A sleeve 407 is pinned to the middle of the fourth link 404. Sleeve 407 fits over the vertical rod of an L-shaped lifting rod 406 and slides up and down along the outer sidewall of the vertical rod. This provides a stable guide for the fourth link 404, further stabilizing the overall multi-link mechanism. A retaining ring 408 is located at the top of the vertical rod of the L-shaped lifting rod 406 to prevent excessive movement and ensure the safety of the lifting chassis.

[0029] The above structure further defines the specific structure of the shock-absorbing mechanism and the multi-link mechanism, as well as the specific connection position of the shock-absorbing mechanism and the multi-link mechanism. The drive nut 201 is connected to the transverse moving rod 405 in the multi-link mechanism, and the linear movement of the drive nut 201 on the threaded driven transmission rod 2 provides precise height adjustment capability. When the drive nut 201 rotates and moves, it pushes the transverse moving rod 201 to move horizontally, thereby driving the first link 401, the second link 402 and the third link 403, and the fourth link 404 to extend outward or contract inward through the hinge point of the link, thereby converting it into the lifting movement of the L-shaped lifting rod 406. The connection method of the various links in the multi-link mechanism enables all links to work together, which can more effectively disperse and transmit force, thereby enhancing the carrying capacity of the entire lifting chassis.

[0030] At the same time, if Figure 8 As shown, when the lifting chassis descends, the driving nut 201 rotates and moves leftward, the second spring 704 is in an extended loading state, and the first spring member 703 is in a contracted loading state, the second sliding member 702 moves leftward, and the pressure on the first sliding member 701 increases, so the shock absorption becomes harder. Figure 5 As shown, when the lifting chassis rises, the drive nut 201 moves to the right, the second spring 704 is in a relaxed state of unloading, the first sliding member 701 moves to the right a small amount, the first spring member 703 is in a relaxed state of unloading, and the second sliding member 702 also moves to the right under the action of the first spring member 703. At this time, the thrust received by the first sliding member 701 is reduced, and the shock absorption becomes softer. This function can adjust the hardness of the shock absorption according to the working or ground conditions, improve the stability of the chassis, and reduce the interference of uneven ground or obstacles on the driving stability of the lifting chassis. This multi-link mechanism, transmission mechanism and shock absorption mechanism work in conjunction with each other to achieve the smooth lifting and lowering of the lifting chassis, so that the transport vehicle can adjust its own height according to actual conditions when facing different terrains and obstacles, thereby enhancing the adaptability to complex environments and improving work efficiency and safety.

[0031] like Figure 2-Figure 4 As shown, a driving pulley 102 is connected to the output shaft of the first motor 101, and a transmission belt slot is provided in the middle of the top of the electrical platform 1; a transversely arranged active transmission rod 3 is fixedly supported by a first support body 301 and is located in the middle of the top of the transmission platform 6, and a group of active pulleys are rotatably connected to the outside of the active transmission rod 3 at even intervals; the active pulleys include a first active pulley 303 located in the middle of the active transmission rod 3, and second active pulleys 302 located on both sides of the first active pulley 303 and connected to the active transmission rod 3; after the first transmission belt is connected to the driving pulley 102, it passes vertically downward through the transmission belt slot and is connected to the first active pulley 303.

[0032] When first motor 101 rotates forward or reverse, the active drive rod 3 drives the driven drive rod 2, causing the drive nut 201 to move linearly along the driven drive rod 2, i.e., inward or outward. This drives the connected multi-link mechanism, which translates into up and down motion of the transmission platform 6, i.e., raising or lowering the elevating chassis. Through the ingenious combination of the transmission mechanism, multi-link mechanism, and shock-absorbing mechanism, the entire elevating chassis can be raised or lowered, achieving flexible adjustment of the chassis height while maintaining high transmission efficiency, excellent stability, and a wide range of applications.

[0033] A driven transmission rod 2 is symmetrically supported by a second support body 202 on both sides of the active transmission rod 3 and on the front and rear end side walls of the top of the transmission platform 6; a driven pulley 203 matching the second active pulley 302 is symmetrically provided on the driven transmission rod 2; the two second active pulleys 302 are respectively connected to the two driven pulleys 203 through a second transmission belt.

[0034] The above structure further defines the installation positions between the first motor 101, the active transmission rod 3, and the passive transmission rod 2. The driving pulley 102 transmits power downward via the first transmission belt, passes through the transmission belt slot on the electrical platform 1, and connects to the first active pulley 303 on the active transmission rod 3. After the first active pulley 303 rotates, the active transmission rod 3 distributes the power to the second active pulleys 302 located on either side of it. The two second active pulleys 302 are then connected to the driven pulleys 203 on the passive transmission rods on either side via the second transmission belt, achieving further power distribution. The belt drive ensures stable power transmission from the first motor 101 to the active transmission rod 3 and the passive transmission rod 2, avoiding the instability caused by direct drive and ensuring that the lifting chassis maintains good balance during the lifting process.

[0035] In addition, if Figures 1-8As shown, the bottom of the transverse connecting rod of the L-shaped lifting rod 406 is fixed with a motor connecting plate, and a transversely arranged second motor 501 is connected to the motor connecting plate. The output shaft of the second motor 501 is rotatably connected to a Mecanum wheel 502 that matches it. In the above structure, the Mecanum wheel 502 is a specially designed wheel with a unique roller structure, which enables the transport vehicle to achieve multiple modes of movement such as moving forward, backward, sideways, obliquely, and rotating in place without turning. Due to the special design of the Mecanum wheel 502, the transport vehicle can adjust its posture more smoothly during movement, reducing the shaking caused by changes in the center of gravity or uneven ground, thereby improving the stability and reliability of the transport vehicle when performing tasks. At the same time, in the lifting chassis, the Mecanum wheel 502 is not only responsible for the movement of the transport vehicle, but also needs to work in conjunction with the multi-link mechanism, transmission mechanism, etc. For example, during the lifting process, the Mecanum wheels 502 can ensure that the transport vehicle's lifting chassis maintains a stable posture during the lifting process; while during the movement, the multi-link mechanism can adjust the height of the transport vehicle's lifting chassis to adapt to different ground conditions or work requirements.

[0036] The present invention also provides a transport vehicle, which is provided with the above-mentioned lifting chassis for the transport vehicle.

[0037] The working principle of the embodiment of the present invention is as follows: Firstly, the ingenious coordination of the multi-link mechanism, transmission mechanism and shock-absorbing mechanism enables the smooth lifting and lowering function of the entire lifting chassis.

[0038] The first motor 101 on the electrical platform 1 rotates the drive pulley 102 via its output shaft. The drive pulley 102 then rotates the first driving pulley 303 via the first transmission belt. The first driving pulley 303 is located on the active transmission rod 3 and drives the rod and the second driving pulley 302 on it to rotate. The second driving pulley 302, through the secondary transmission mechanism, rotates the driven pulley 203 on the driven transmission rod 2, driving the driven transmission rod 2 to rotate. This in turn drives the drive nuts 201 on both sides to move linearly inward or outward along the direction of the driven transmission rod 2's threads, driving the multi-link mechanism connected to them.

[0039] Secondly, if Figure 8 As shown, when the motor rotates forward, the driving nuts 201 on both sides of the driven rotating rod 2 move linearly outward along the driven rotating rod 2, pushing the lateral moving rod 405 to move horizontally outward. At the same time, the lateral moving rod 405 drives the third connecting rod 403 and the fourth connecting rod 404 to extend outward, thereby increasing the inclination angle of the first connecting rod 401 and the second connecting rod 402. The fourth connecting rod 404 slides downward along the vertical long rod of the L-shaped lifting rod 406 through the sleeve 407, as shown in FIG. Figure 6 As shown, the entire lifting chassis is in a descending state at this time.

[0040] like Figure 5 As shown, when the motor reverses, the driving nuts 201 on both sides of the driven rotating rod 2 move linearly along the thread direction of the driven rotating rod 2, pushing the transverse moving rod 405 to move horizontally inward, and at the same time, the transverse moving rod 405 drives the third connecting rod 403 and the fourth connecting rod 404 to retract inward, so that the inclination angle of the first connecting rod 401 and the second connecting rod 402 becomes smaller, and the fourth connecting rod 404 slides upward along the vertical long rod of the L-shaped lifting rod 406 through the sleeve 407, as shown in FIG. Figure 5 As shown, the entire lifting chassis is in an ascending state at this time.

[0041] At the same time, during the lifting and lowering process of the lifting chassis, if Figure 8 As shown, when the lifting chassis descends, the driving nut 201 rotates and moves leftward, the second spring 704 is in an extended loading state, and the first spring member 703 is in a contracted loading state, the second sliding member 702 moves leftward, and the pressure on the first sliding member 701 increases, so the shock absorption becomes harder. Figure 5 As shown, when the lift chassis ascends, the drive nut 201 shifts rightward, the second spring 704 enters a relaxed state, and the first slider 701 shifts slightly rightward, placing the first spring member 703 in a relaxed, unloaded state. The second slider 702, under the action of the first spring member 703, also shifts rightward. The thrust applied to the first slider 701 decreases, softening the shock absorption. This feature allows the softness or firmness of the shock absorption to be adjusted according to the operating or ground conditions, improving chassis stability and reducing the impact of uneven surfaces or obstacles on the lift chassis's driving stability.

[0042] In summary, the design of the lifting chassis for transport vehicles of the present invention cleverly combines the advantages of efficient transmission, stable lifting and flexible movement, and provides strong support for transport vehicles to cope with complex and changeable ground environments. The clever coordination of its multi-link mechanism with the transmission mechanism and the shock-absorbing mechanism not only ensures the smoothness and speed of the lifting process, but also realizes the flexible adjustment of the chassis height by precisely controlling the movement of the drive nut. Whether it is necessary to carry weight, move quickly, or make sharp turns, the chassis can be quickly lowered to maintain stability, and when normal driving on normal roads is restored, the original height can be quickly restored. In addition, the introduction of Mecanum wheels gives the transport vehicle the ability to move in all directions, allowing it to maintain excellent controllability and stability even in sharp turns or complex terrain.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lifting chassis for a transport vehicle, characterized in that: It comprises a multi-link mechanism, a transmission mechanism, a shock absorbing mechanism, a transmission platform (6), and an electrical platform (1) that are symmetrically arranged with each other, wherein the electrical platform (1) is fixed above the transmission platform (6) via a vertically arranged fixing plate; The transmission mechanism comprises an active transmission rod (3), the active transmission rod (3) being laterally mounted on the top of the transmission platform (6), and driven transmission rods (2) matching the active transmission rod (3) being mounted on both sides of the transmission platform (6), and both ends of the driven transmission rod (2) being provided with threads and driving nuts (201) matching therewith. A first motor (101) is provided on the top of the electrical platform (1) and is arranged opposite to the active transmission rod (3); the active transmission rod (3) is respectively connected to the driven transmission rod (2) and the first motor (101) via a transmission belt; The shock absorbing mechanism is slidably and symmetrically mounted on both ends of the transmission platform (6); The multi-link mechanism comprises a plurality of connecting rods hinged to each other, and the multi-link mechanism is respectively connected to the driving nut (201) and the shock absorbing mechanism; When the first motor (101) drives the driven transmission rod (2) to rotate forward and reverse, the driving nut (201) performs linear motion inward or outward along the driven transmission rod, driving the multi-link mechanism to move in a linked manner.

2. A lifting chassis for a transport vehicle according to claim 1, characterized in that: The shock absorbing mechanism includes a transversely arranged sliding member and an elastic member matched therewith; The two ends of the transmission platform (6) are symmetrically provided with slide grooves matching the sliding member, the upper and lower sides of the slide groove are provided with slots, and the front and rear inner side walls of the slide groove are symmetrically provided with slideways; The sliding member comprises a first sliding member (701) and a second sliding member (702), and the elastic member comprises a first spring (703) and a second spring (704); The first sliding member (701) is slidably provided on one end of the slide groove, which is close to the side of the multi-link mechanism, and the second sliding member (702) is slidably provided on the other end of the slide groove, which is opposite to the first sliding member (701).

3. A lifting chassis for a transport vehicle according to claim 2, characterized in that: The first sliding member (701) comprises a first slider body (7011) matching the slideway, one end of the first slider body (7011) abuts against the bottom wall of the slideway, and the other end is provided with a sliding sleeve (7012); The second sliding member (702) includes a second slider body (7021), and a sliding rod (7022) is further provided on the second slider body (7021) on a side opposite to the sliding sleeve (7012). The sliding rod (7022) is slidably installed inside the sliding sleeve (7012), and the first spring (703) is sleeved on the outside of the sliding sleeve (7012). One end of the first spring (703) is fixedly connected to the first slider body (7011), and the other end is fixedly connected to the second slider body (7021).

4. A lifting chassis for a transport vehicle according to claim 3, characterized in that: The multi-link mechanism comprises an L-shaped lifting rod (406), the L-shaped lifting rod (406) being vertically mounted on the outside of the driven transmission rod (2), a vertical connecting rod (409) being provided on the outside of the bottom of the driving nut (201), and a transverse moving rod (405) being fixed on the bottom of the vertical connecting rod (409); A vertical connecting block (7023) is provided on the top of the second slider body (7021). The vertical connecting block (7023) passes upward through the slot and is fixed to one end of the second spring (704). The other end of the second spring (704) is fixed to the vertical connecting rod (409).

5. The lifting chassis for transport vehicles according to claim 4, characterized in that: The multi-link mechanism further includes a first link group and a second link group; The first connecting rod assembly comprises a first connecting rod (401) and a second connecting rod (402), wherein the first connecting rod (401) and the second connecting rod (402) are parallel to each other, arranged obliquely, and located on the same plane; A hinged connector is provided at the bottom of the first slider (7011), the hinged connector passes downward through the slot and is hinged to one end of the first connecting rod (401) and the second connecting rod (402), respectively. The other ends of the first connecting rod (401) and the second connecting rod are respectively hinged to the transverse connecting rod of the L-shaped lifting rod (406); The second connecting rod group includes a third connecting rod (403) and a fourth connecting rod (404), wherein the third connecting rod (403) and the fourth connecting rod (404) are parallel to each other, arranged at an angle, and located on the same plane, and one end of the third connecting rod (403) and the fourth connecting rod (404) are respectively hinged to the transverse moving rod (405), and the other ends thereof are respectively hinged to the bottom of the first connecting rod (401) and the second connecting rod (402).

6. The lifting chassis for transport vehicles according to claim 5, characterized in that: The middle part of the fourth connecting rod (404) is connected to a sleeve (407) via a pin shaft. The sleeve (407) is sleeved on the vertical long rod of the L-shaped lifting rod (406). The sleeve (407) can slide up and down along the outer side wall of the vertical rod of the L-shaped lifting rod (406).

7. The lifting chassis for a transport vehicle according to claim 1, characterized in that: The output shaft of the first motor (101) is connected to a driving pulley (102), and a transmission belt slot is provided at the top middle position of the electrical platform (1); The active transmission rod (3) is located in the middle of the top of the transmission platform (6) and is fixedly supported by a first support body (301). A group of active pulleys are rotatably connected to the outside of the active transmission rod (3) at even intervals. The active pulleys include a first active pulley (303) located in the middle of the active transmission rod (3) and connected to the active transmission rod (3), and second active pulleys (302) located on both sides of the first active pulley (303) and connected to the active transmission rod (3). The transmission belt comprises a first transmission belt and a second transmission belt. The first transmission belt is connected to the driving pulley (102), passes vertically downward through the transmission belt slot, and is connected to the first active pulley (303).

8. The lifting chassis for transport vehicles according to claim 7, characterized in that: The driven transmission rod (2) is symmetrically supported on both sides of the active transmission rod (3) and on the front and rear side walls of the top of the transmission platform (6) via a second support body (202); The driven transmission rod (2) is symmetrically provided with driven pulleys (203) that match the second driving pulley (302), and the two second driving pulleys (302) are respectively connected to the two driven pulleys (203) via the second transmission belt.

9. The lifting chassis for a transport vehicle according to claim 4, characterized in that: A motor connecting plate is fixedly provided at the bottom of the transverse connecting rod of the L-shaped lifting rod (406), a transversely arranged second motor (501) is connected to the motor connecting plate, and a Mecanum wheel (502) matching the second motor (501) is rotatably connected to the output shaft of the second motor (501).

10. A transport vehicle, characterized in that: The transport vehicle is provided with the transport vehicle lifting chassis according to claim 1.

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