Platform car

Abstract

The invention relates to a platform car, and belongs to the technical field of platform cars. The lifting device comprises a chassis, a lifting mechanism arranged on the chassis, a lifting platform arranged on the lifting mechanism, a hydraulic driving mechanism arranged on the chassis and used for driving the lifting mechanism to move, a sliding piece arranged on the lifting mechanism and sliding on the chassis, and a limiting mechanism arranged on the sliding piece and limiting the sliding piece from sliding on the chassis. The limiting mechanism comprises a first limiting assembly arranged on the chassis, a second limiting assembly arranged in the sliding piece and used for limiting the first limiting assembly, and a third limiting assembly matched with the second limiting assembly. Through cooperative work of all the components, the platform car can stably conduct lifting operation, sliding of the sliding part is effectively restrained, the stability of the platform car during operation is enhanced, and use safety is guaranteed.

Description

Technical Field

[0001] This application relates to the field of platform vehicle technology, and in particular to a platform vehicle. Background Technology

[0002] With the continuous development of industry and logistics, the demand for cargo handling and high-altitude operations is increasing. Platform trucks, as an important piece of equipment, play a crucial role in improving work efficiency and reducing labor intensity. They are widely used in factories, warehouses, docks, and other locations, enabling vertical transportation of goods and personnel operations at different heights, greatly promoting production and operations across various industries. In modern industrial production and logistics, efficient and safe cargo handling and high-altitude operations are vital for ensuring smooth production and personnel safety.

[0003] Platform trucks are widely used in practical applications, typically employing hydraulic or electric drives for starting. However, prolonged use can lead to hydraulic system leaks or motor malfunctions. Ordinary hydraulic systems use hydraulic oil pressure to drive a piston, raising the platform. However, due to the complexity of hydraulic systems and unavoidable leaks, their control precision and stability are often unsatisfactory. Furthermore, fixing and limiting the platform's position during lifting often relies on simple latches or bolts, which are cumbersome and have limited reliability. When the platform truck loses hydraulic pressure and suddenly falls, existing locking devices cannot function effectively, compromising safety. Existing fall arrest mechanisms are also ineffective, susceptible to wear, jamming, and other failures. Ultimately, the inability to effectively prevent sudden falls poses a serious threat to the safety of personnel and goods. Summary of the Invention

[0004] To improve the anti-fall effect of platform vehicles, this application provides a platform vehicle.

[0005] The platform vehicle provided in this application adopts the following technical solution: A platform vehicle includes a chassis, a lifting mechanism arranged on the chassis, a lifting platform arranged on the lifting mechanism, a hydraulic drive mechanism arranged on the chassis and used to drive the movement of the lifting mechanism, a sliding member arranged on the lifting mechanism and sliding on the chassis, and a limiting mechanism arranged on the sliding member and restricting the sliding member from sliding on the chassis. The limiting mechanism includes a first limiting component arranged on the chassis, a second limiting component arranged within the sliding member and limiting the first limiting component, and a third limiting component cooperating with the second limiting component.

[0006] By adopting the above technical solutions, the chassis provides support and load-bearing foundation, the lifting mechanism can realize the lifting action of the lifting platform to meet the needs of different height operations; the hydraulic drive mechanism provides power for the movement of the lifting mechanism; the sliding component can slide on the chassis, increasing the flexibility and adjustability of the platform vehicle; the limiting mechanism, through the cooperation of the first limiting component, the second limiting component and the third limiting component, restricts the sliding component on the chassis, ensuring the stability and safety of the equipment.

[0007] Optionally, the hydraulic drive mechanism includes a hydraulic cylinder hinged to the lifting mechanism and a hydraulic drive assembly for driving the hydraulic cylinder; The hydraulic drive assembly includes a hydraulic oil tank disposed within the chassis, a hydraulic gear pump for pumping hydraulic oil from the hydraulic oil tank into or out of the hydraulic cylinder, and a battery for powering the hydraulic gear pump.

[0008] By adopting the above technical solution, the hydraulic gear pump, driven by the battery, can pressurize or extract hydraulic oil from the hydraulic oil tank into or out of the hydraulic cylinder. The hydraulic cylinder drives the lifting mechanism to move, realizing the smooth and efficient lifting operation of the platform vehicle.

[0009] Optionally, the chassis is provided with a sliding guide rail for the sliding member to move, and the bottom of the sliding member is provided with a sliding groove that matches the sliding guide rail.

[0010] By adopting the above technical solution, a sliding guide rail is set inside the chassis, and a matching sliding groove is set at the bottom of the sliding component, so that the sliding component can slide stably and smoothly on the chassis, thereby improving the stability and reliability of the platform vehicle lifting mechanism during operation.

[0011] Optionally, the first limiting component includes a first rack disposed within the chassis and a first gear meshing with the first rack, wherein a first connecting rod is disposed on the first gear.

[0012] By adopting the above technical solution, a first rack is set in the chassis to mesh with a first gear, and a first connecting rod is arranged on the first gear, so that the first gear can move along the first rack. The first connecting rod can transmit the motion of the first gear to other components, thereby realizing the initial limitation of the sliding part sliding on the chassis, and providing a basis for the subsequent cooperation of the limiting mechanism.

[0013] Optionally, the second limiting component includes a second internal gear ring arranged within the sliding member, a second rotating shaft arranged at the center of the second internal gear ring, a second fixing member arranged on the second rotating shaft, and a second meshing gear arranged on the second fixing member. The second meshing gear and the second internal gear ring are in the same plane, the second rotating shaft is fixed to the first connecting rod, and the outer side of the second internal gear ring is provided with protruding teeth.

[0014] By adopting the above technical solution, the limiting mechanism of the platform vehicle can better restrict the sliding of the sliding parts on the chassis. The second internal gear ring, the second rotating shaft, the second fixing part and the second meshing gear of the second limiting component cooperate, and the second rotating shaft is fixed to the first connecting rod. The outer side of the second internal gear ring is arranged with convex teeth, which can work together with the first limiting component and the third limiting component to effectively limit the sliding parts and ensure the stable operation of the platform vehicle.

[0015] Optionally, the third limiting component includes a third rack arranged within the sliding member, a third slide rail arranged at the bottom of the third rack, a third spring arranged on the third rack and limiting the third rack, a rotating rod arranged at the output end of the third rack, a third limiting spring abutting against the rotating rod and abutting against the inner wall of the sliding member, and a third rotating shaft arranged on the rotating rod.

[0016] By adopting the above technical solution, the third slide rail allows the third rack to slide and adjust its position, and the third spring can limit the third rack to prevent it from moving excessively; the rotating rod can rotate around the third rotation axis under the action of the third rack, and the third limiting spring abuts against the rotating rod and against the inner wall of the sliding part, which can assist in positioning the rotating rod; in conjunction with the first limiting component and the second limiting component, the sliding part can be further restricted from sliding on the chassis, thereby enhancing the stability of the platform vehicle during operation.

[0017] Optionally, a torsion spring is arranged on the third rotating shaft, the rotating rod is inclinedly arranged inside the sliding member, and the bottom part of the rotating rod extends out of the sliding member; the third rack slides against the rotating rod and rotates the inclined rotating rod around the third rotating shaft, and the rotating rod abuts against the sliding guide rail.

[0018] By adopting the above technical solution, the platform vehicle includes a chassis, a lifting mechanism, a lifting platform, a hydraulic drive mechanism, a sliding component, and a limiting mechanism. The limiting mechanism includes first, second, and third limiting components. A torsion spring is arranged on the third rotating shaft. The rotating rod is inclinedly arranged inside the sliding component and extends out of the sliding component at its bottom end. The third rack slides against the rotating rod, causing it to rotate around the third rotating shaft and abut against the sliding guide rail. This can effectively limit the sliding component from sliding on the chassis, improving the stability and safety of the platform vehicle.

[0019] Optionally, the rotating rod is provided with a friction pad, and the sliding guide rail is provided with an anti-slip groove at the contact point with the rotating rod.

[0020] By adopting the above technical solution, friction pads are set on the rotating rod of the platform vehicle, and anti-slip grooves are arranged at the contact point between the sliding guide rail and the rotating rod. This increases the friction between the rotating rod and the sliding guide rail, improves the limiting effect of the limiting mechanism on the sliding parts sliding on the chassis, and makes the platform vehicle more stable and reliable during operation.

[0021] Optionally, the chassis is provided with a drive wheel and a driven wheel for the movement of the platform vehicle. The drive wheel is provided with a handle for rotating the drive wheel, and the handle is also provided with a control button.

[0022] By adopting the above technical solution, the platform vehicle is made movable by setting up a drive wheel and a driven wheel. The handle makes it easy to turn the drive wheel to control the direction of the platform vehicle's movement, and the handle is equipped with control buttons to facilitate the operation of the platform vehicle.

[0023] Optionally, the bottom of the chassis is also provided with movable outriggers for supporting the operation of the platform vehicle, and the movable outriggers are telescopic.

[0024] By adopting the above technical solution, movable outriggers are installed at the bottom of the chassis, which can provide support when the platform vehicle is working, enhance the stability of the vehicle, and ensure the safety and reliability of the vehicle's operation.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The hydraulic drive mechanism consists of a hydraulic cylinder, a hydraulic oil tank, a hydraulic gear pump, and a battery. The battery drives the hydraulic gear pump to pressurize or extract hydraulic oil from the hydraulic oil tank into or out of the hydraulic cylinder, thereby driving the lifting mechanism. This allows for more precise control of the lifting height and stability of the lifting platform, effectively avoiding the swaying and deviation that are prone to occur in traditional drive methods, and enabling goods and personnel to be transported vertically more smoothly. 2. The limiting mechanism includes a first limiting component, a second limiting component, and a third limiting component. Through the cooperation between these components, the sliding parts can be restricted from sliding on the chassis. This effectively ensures the safe positioning of the platform during lifting and lowering, avoids the problem of simple limiting methods becoming loose due to long-term use, and ensures that the platform vehicle is in a fixed and reliable position during operation, providing a stable foundation for cargo handling and high-altitude operations. 3. When the platform vehicle loses hydraulic pressure, the third rack, rotating rod, and other components in the limit mechanism will work together. The rotating rod will rotate around the rotation axis and abut against the sliding guide rail, which can play a timely role in preventing the platform vehicle from falling suddenly, ensuring the safety of personnel and goods in emergency situations, and reducing the risk of accidents. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the hydraulic drive mechanism structure according to an embodiment of this application.

[0028] Figure 3 This is a cross-sectional schematic diagram of the limiting component according to an embodiment of this application.

[0029] Figure 4 This is a three-dimensional cross-sectional view of the limiting component according to an embodiment of this application.

[0030] Figure 5 This is an active state diagram of the second limiting component in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Chassis; 11. Sliding guide rail; 111. Anti-slip groove; 12. Drive wheel; 13. Driven wheel; 14. Handle; 141. Control button; 15. Movable outrigger; 2. Lifting mechanism; 3. Hydraulic drive mechanism; 31. Hydraulic cylinder; 32. Hydraulic drive assembly; 321. Hydraulic oil tank; 322. Hydraulic gear pump; 323. Battery; 4. Sliding component; 41. Sliding groove; 5. Limiting mechanism; 51. First limiting assembly; 511. First rack; 512. First... 513. Gear; 52. First connecting rod; 52. Second limiting assembly; 521. Second internal gear ring; 5211. Convex tooth; 522. Second rotating shaft; 523. Second fixing member; 524. Second meshing gear; 5241. Arc-shaped slide groove; 5242. Arc-shaped limiting groove; 53. Third limiting assembly; 531. Third rack; 532. Third slide rail; 533. Third spring; 534. Rotating rod; 535. Third limiting spring; 536. Third rotating shaft; 5361. Torsion spring; 6. Lifting platform. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a platform vehicle.

[0034] Reference Figure 1 and Figure 2 As shown, a platform vehicle includes a chassis 1, a lifting mechanism 2, a lifting platform 6, a hydraulic drive mechanism 3, a sliding member 4, and a limiting mechanism 5. The lifting mechanism 2 is arranged on the chassis 1, the lifting platform 6 is arranged on the lifting mechanism 2, the hydraulic drive mechanism 3 is arranged on the chassis 1 and is used to drive the movement of the lifting mechanism 2, the sliding member 4 is arranged on the lifting mechanism 2 and slides on the chassis 1, and the limiting mechanism 5 is arranged on the sliding member 4 and restricts the sliding member 4 from sliding on the chassis 1, thereby limiting the lifting mechanism 2, improving the stability of the lifting mechanism 2 in case of emergencies, and preventing the sliding member 4 from excessively sliding to ensure safety.

[0035] Reference Figure 1As shown, the chassis 1 is equipped with a drive wheel 12 and a driven wheel 13 for the movement of the platform vehicle. A handle 14 is arranged on the drive wheel 12 for rotating it. Rotating the handle 14 changes the forward direction of the drive wheel 12, thereby controlling the forward movement or steering of the platform vehicle. A control button 141 is provided on the handle 14, which controls the operation of the hydraulic drive mechanism 3 on the platform vehicle. The chassis 1 serves as the overall support structure for the platform vehicle, ensuring its stability.

[0036] The bottom of the chassis 1 is also equipped with movable outriggers 15 for supporting the platform vehicle's operation. The movable outriggers 15 are telescopic. When the platform vehicle is in operation, the movable outriggers 15 extend, increasing the support area and improving stability; when not in operation, they can retract for easy movement. The movable outriggers 15 can be telescopicated hydraulically or electrically, for example, by using a hydraulic cylinder 31 to drive the movable outriggers 15 to telescopicate.

[0037] Reference Figure 2 As shown, the lifting mechanism 2 adopts a scissor lift frame composed of scissor arms. The lower end of the lifting mechanism 2 is hinged to the chassis 1, and the top of the lifting mechanism 2 is fixedly installed with a lifting platform 6 for carrying goods or personnel.

[0038] Reference Figure 2 As shown, the hydraulic drive mechanism 3 includes a hydraulic cylinder 31 hinged to the lifting mechanism 2 and a hydraulic drive assembly 32 that drives the hydraulic cylinder 31. The piston rod of the hydraulic cylinder 31 is hinged to the scissor arm on the lifting mechanism 2. The extension and retraction of the piston rod can directly push the scissor arm to extend or retract, thereby realizing the raising and lowering of the lifting platform 6. The hydraulic drive assembly 32 includes a hydraulic oil tank 321 arranged in the chassis 1, a hydraulic gear pump 322 that pumps or extracts hydraulic oil from the hydraulic oil tank 321, and a battery 323 that powers the hydraulic gear pump 322. The hydraulic oil tank 321 is used to store hydraulic oil and can be made of metal with a certain sealing performance to prevent hydraulic oil leakage. The hydraulic gear pump 322 draws hydraulic oil from the tank and pumps it into the hydraulic cylinder 31, thereby driving the lifting mechanism 2. The battery 323 provides power to the hydraulic gear pump 322 and can be a lead-acid battery or a lithium battery, etc. When the lifting platform 6 needs to be raised, the hydraulic gear pump 322 pressurizes hydraulic oil into the hydraulic cylinder 31, pushing the lifting mechanism 2 to rise; when it is lowered, the hydraulic gear pump 322 extracts hydraulic oil from the hydraulic cylinder 31, causing the lifting mechanism 2 to fall.

[0039] Reference Figure 3 and Figure 4As shown, movable cavities are arranged on both sides of the chassis 1. A sliding guide rail 11 for the sliding member 4 to move is arranged in one of the movable cavities. The bottom of the sliding member 4 is provided with a sliding groove 41 that matches the sliding guide rail 11. Through the cooperation of the sliding groove 41 and the sliding guide rail 11, the sliding member 4 can slide smoothly on the sliding guide rail 11 in the movable cavity. The sliding guide rail 11 is convex in shape, and the sliding member 4 is concave in shape to match the sliding guide rail 11.

[0040] The limiting mechanism 5 includes a first limiting component 51 arranged on the chassis 1, a second limiting component 52 arranged in the sliding member 4 and limiting the first limiting component 51, and a third limiting component 53 cooperating with the second limiting component.

[0041] The first limiting component 51 includes a first rack 511 disposed within the chassis 1 and a first gear 512 meshing with the first rack 511. A first connecting rod 513 is also disposed on the first gear 512. The first rack 511 is disposed in the movable cavity opposite to the sliding member 4. The meshing of the first rack 511 and the first gear 512 causes the first gear 512 to rotate. The first connecting rod 513 is connected to the second limiting component 52 within the sliding member 4. The first gear 512 can rotate as the sliding member 4 moves, and the first connecting rod 513 transmits the rotation of the first gear 512 to the second limiting component 52. The lifting mechanism 2 is hinged to the first connecting rod 513.

[0042] The second limiting assembly 52 includes a second internal gear ring 521 arranged within the sliding member 4, a second rotating shaft 522 arranged at the center of the second internal gear ring 521, a second fixing member 523 arranged on the second rotating shaft 522, and a second meshing gear 524 arranged on the second fixing member 523. The second meshing gear 524 and the second internal gear ring 521 are on the same plane. The second rotating shaft 522 is fixed to the first connecting rod 513. The outer side of the second internal gear ring 521 is provided with protruding teeth 5211. The first connecting rod 513 passes through the side wall of the sliding member 4 and is coaxially connected to the second rotating shaft 522. Therefore, when the sliding member 4 slides, it drives the first gear 512 to rotate on the first rack 511. At the same time, when the first gear 512 rotates, it also drives the second rotating shaft 522 to rotate. The second meshing gear 524 is arranged on the second fixing member 523. The second fixing member 523 is provided with an arc-shaped end block, and the second meshing gear 524 is provided with an arc-shaped sliding groove 5241. An arc-shaped limiting groove 5242 for the second fixing member 523 to engage is arranged on the side of the arc-shaped sliding groove 5241. Under normal conditions, the second fixing member 523 is engaged in the arc-shaped limiting groove 5242 of the second meshing gear 524. At this time, the second fixing member 523 limits the second meshing gear 524 to prevent the second meshing gear 524 from rotating. The second fixing member 523 limits the rotation of the second meshing gear 524 within the second internal gear ring 521. The teeth on the side of the second meshing gear 524 do not mesh with the internal teeth of the second internal gear ring 521. The second meshing gear 524 rotates at the center position of the second internal gear ring 521.

[0043] Reference Figure 5As shown, the third limiting assembly 53 includes a third rack 531 disposed within the sliding member 4, a third slide rail 532 disposed at the bottom of the third rack 531, a third spring 533 disposed on and limiting the third rack 531, a rotating rod 534 disposed at the output end of the third rack 531, a third limiting spring 535 abutting against the rotating rod 534 and the interior of the sliding member 4, and a third rotating shaft 536 disposed on the rotating rod 534. The third slide rail 532 provides guidance for the sliding of the third rack 531, and the third spring 533 provides limiting and buffering for the third rack 531. The rotating rod 534 is inclinedly disposed within the sliding member 4, and the bottom part of the rotating rod 534 extends out of the sliding member 4. A torsion spring 5361 is arranged on the third rotating shaft 536. The third rack 531 slides against the rotating rod 534, causing the inclined rotating rod 534 to rotate around the rotating shaft. The rotating rod 534 abuts against the sliding guide rail 11. A friction pad is provided on the rotating rod 534, and an anti-slip groove 111 is arranged at the abutment point between the sliding guide rail 11 and the rotating rod 534. When the protruding tooth 5211 of the second limiting component 52 contacts the third rack 531, it pushes the third rack 531 to slide, thereby causing the rotating rod 534 to rotate around the third rotating shaft 536. The rotating rod 534 abuts against the sliding guide rail 11. Through the cooperation of the friction pad and the anti-slip groove 111, the further sliding of the sliding member 4 is restricted, thus playing a limiting role.

[0044] The implementation principle of a platform vehicle in this embodiment is as follows: the platform vehicle is powered by a hydraulic drive mechanism 3, which drives the lifting mechanism 2 to move, thereby raising and lowering the lifting platform 6. The lifting mechanism 2 raises and lowers, causing the sliding component 4 to slide on the sliding guide rail 11; a limiting mechanism 5 is arranged on the sliding component 4 to prevent damage to the hydraulic drive mechanism 3 from causing the lifting mechanism 2 to fall rapidly, resulting in injury to personnel or damage to property, thus improving the safety of the equipment.

[0045] Under normal use, the hydraulic drive mechanism 3 drives the extension and retraction of the hydraulic cylinder 31. The lifting mechanism 2 rises and falls under the drive of the hydraulic cylinder 31, and the lifting mechanism 2 drives the first connecting rod 513 to move, which in turn drives the sliding member to move on the sliding guide rail. The first gear 512 on the first connecting rod 513 meshes and rotates on the first rack 511. The second fixing member 523 inside the sliding member 4 rotates simultaneously with the first gear 512. Because the lifting frequency of the lifting mechanism 2 is the same, that is, the rotation speed of the first gear 512 is the same as the set value, that is, the second meshing gear 524 on the second fixing member 523 also rotates together with the second fixing member 523. The second meshing gear 524 will not engage and lock with the second internal gear ring 521. Furthermore, when the sliding member 4 slides, the rotating rod 534 inside the sliding member 4 does not contact the top of the sliding guide rail 11, which allows the sliding member 4 to slide stably.

[0046] In special circumstances, if a part of the hydraulic drive mechanism 3 is damaged, the hydraulic cylinder 31 will lose power and be unable to support the entire lifting mechanism 2. At this time, the raised lifting platform 6 and lifting mechanism 2 will fall rapidly. When the lifting mechanism 2 falls, the scissor arm on the lifting mechanism 2 moves rapidly, thereby realizing the rapid sliding of the sliding part 4. Because the rotation speed of the first gear 512 on the first rack 511 increases instantaneously, the rotational acceleration of the first gear 512 increases, causing the first gear 512 to rotate rapidly. When the first gear 512 rotates rapidly, it also accelerates the rotation of the second shaft 522 through the first connecting rod 513. The centrifugal force generated by the accelerated rotation of the second fixing member 523 is greater than the frictional force between the second fixing member 523 and the second meshing gear 524. The centrifugal force causes the second meshing gear 524 to disengage from the arc-shaped limiting groove 5242. The second fixing member 523 moves on the arc-shaped sliding groove 5241 to achieve eccentricity of the second meshing gear 524. The teeth on the second meshing gear 524 mesh and lock with the second internal gear ring 521, restricting the rotation of the second shaft 522.

[0047] When the second internal gear ring 521 is engaged with the second meshing gear 524, the excess power of the second rotating shaft 522 will drive the second internal gear ring 521 to rotate, causing the third rack 531 meshing with it to slide on the third slide rail 532. The rotation of the second internal gear ring 521 is greater than the elastic force of the third spring 533 on the third rack 531. The third rack 531 moves and abuts against the inclined rotating rod 534, thereby driving the rotating rod 534 to rotate. The rotating sliding guide rail 11 abuts against it, and anti-slip grooves 111 and friction pads are provided at the contact between the rotating rod 534 and the sliding guide rail 11 and at the bottom of the rotating rod 534 to increase friction. Further restricting the sliding member 4 and the sliding guide rail 11, the sliding member 4 stops on the sliding guide rail 11, and the first gear 512 on the first limiting component 51 on the other side cannot rotate and interacts with the first rack 511 to restrict it. The sliding member 4 is locked to the chassis 1, which can instantly decelerate and stop the falling lifting mechanism 2, improving the stability of the entire platform vehicle. The rotation of the second internal gear ring 521 also serves as a guide force, locking the force generated by the fall to the sliding guide rail 11 via the rotating rod 534, thereby locking it to the chassis 1.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A platform vehicle, characterized in that, It includes a chassis (1), a lifting mechanism (2) arranged on the chassis (1), a lifting platform (6) arranged on the lifting mechanism (2), a hydraulic drive mechanism (3) arranged on the chassis (1) and used to drive the lifting mechanism (2) to move, a sliding member (4) arranged on the lifting mechanism (2) and sliding on the chassis (1), and a limiting mechanism (5) arranged on the sliding member (4) and limiting the sliding member (4) to slide on the chassis (1); The limiting mechanism (5) includes a first limiting component (51) arranged on the chassis (1), a second limiting component (52) arranged in the sliding member (4) and limiting the first limiting component (51), and a third limiting component (53) cooperating with the second limiting component (52).

2. The platform vehicle according to claim 1, characterized in that, The hydraulic drive mechanism (3) includes a hydraulic cylinder (31) hinged to the lifting mechanism (2) and a hydraulic drive assembly (32) that drives the hydraulic cylinder (31) to move. The hydraulic drive assembly (32) includes a hydraulic oil tank (321) arranged in the chassis (1), a hydraulic gear pump (322) that presses or extracts hydraulic oil from the hydraulic oil tank (321) into or out of the hydraulic cylinder (31), and a battery (323) for the hydraulic gear pump (322) to operate.

3. A platform vehicle according to claim 1, characterized in that, The chassis (1) is provided with a sliding guide rail (11) for the sliding member (4) to move, and the bottom of the sliding member (4) is provided with a sliding groove (41) that is compatible with the sliding guide rail (11).

4. A platform vehicle according to claim 3, characterized in that, The first limiting component (51) includes a first rack (511) arranged in the chassis (1) and a first gear (512) meshing with the first rack (511), and a first connecting rod (513) is arranged on the first gear (512).

5. A platform vehicle according to claim 4, characterized in that, The second limiting component (52) includes a second internal gear ring (521) arranged in the sliding member (4), a second rotating shaft (522) arranged at the center of the second internal gear ring (521), a second fixing member (523) arranged on the second rotating shaft (522), and a second meshing gear (524) arranged on the second fixing member (523). The second meshing gear (524) and the second internal gear ring (521) are in the same plane. The second rotating shaft (522) is fixed to the first connecting rod (513). The outer side of the second internal gear ring (521) is provided with protruding teeth (5211).

6. A platform vehicle according to claim 5, characterized in that, The third limiting component (53) includes a third rack (531) arranged in the sliding member (4), a third slide rail (532) arranged at the bottom of the third rack (531), a third spring (533) arranged on the third rack (531) and limiting the third rack (531), a rotating rod (534) arranged at the output end of the third rack (531), a third limiting spring (535) abutting against the rotating rod (534) and abutting against the inner wall of the sliding member (4), and a third rotating shaft (536) arranged on the rotating rod (534).

7. A platform vehicle according to claim 6, characterized in that, A torsion spring (5361) is arranged on the third rotating shaft (536), the rotating rod (534) is inclinedly arranged in the sliding member (4), and the bottom part of the rotating rod (534) extends out of the sliding member (4); the third rack (531) slides against the rotating rod (534) and rotates the inclined rotating rod (534) around the third rotating shaft (536), and the rotating rod (534) abuts against the sliding guide rail (11).

8. A platform vehicle according to claim 7, characterized in that, The rotating rod (534) is provided with a friction pad, and the sliding guide rail (11) is provided with an anti-slip groove (111) at the contact point with the rotating rod (534).

9. A platform vehicle according to claim 1, characterized in that, The chassis (1) is provided with a drive wheel (12) and a driven wheel (13) for the movement of the platform vehicle. The drive wheel (12) is provided with a handle (14) for rotating the drive wheel (12), and the handle (14) is also provided with a control button (141).

10. A platform vehicle according to claim 1, characterized in that, The bottom of the chassis (1) is also provided with movable support legs (15) for supporting the operation of the platform vehicle, and the movable support legs (15) can extend and retract.

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