A lifting mechanism of a hydraulic elevator

Abstract

The present application relates to the technical field of elevator, specifically is a kind of lifting mechanism of hydraulic elevator, including two groups of left-right symmetrical arrangement scissor mechanism, two groups of scissor mechanism upper portion are provided with lifting platform through connecting mechanism, two groups of scissor mechanism lower portion are provided with two front and rear symmetrical arrangement base strip through sliding mechanism, the present application uses sliding mechanism to drive two base plates to be far away from each other and close to each other by two groups of scissor mechanism, then cooperate drive assembly to drive lifting platform to be moved downward to between two groups of scissor mechanism by connecting piece, so that lifting platform can be lowest to ground in the case where not digging bottom pit, reduce the installation environment demand of hydraulic scissor type elevator, the present application uses two groups of scissor mechanism to drive two base plates to be close to each other and finally rest on the lower portion of lifting platform when lifting platform jacks up goods, form stable support structure, ensure the stability and security of lifting platform in the process of lifting.

Description

Technical Field

[0001] This invention relates to the field of lifting technology, specifically a lifting mechanism for a hydraulic lifting platform. Background Technology

[0002] Hydraulic scissor lifts, as a common and mature lifting device, are widely used in industries, logistics, and construction to achieve vertical lifting of goods or personnel. Their basic structure typically includes a scissor mechanism consisting of one or more crisscrossing scissor arms. These arms are installed horizontally or at a small angle via hydraulic cylinders, and the extension and retraction of the hydraulic cylinders pushes the hinge points of the scissor arms, thereby expanding or retracting the entire scissor frame and driving the platform installed above the scissor mechanism to achieve the lifting function.

[0003] However, traditional hydraulic scissor lifts have certain structural limitations. Because the scissor mechanism is always located below the lifting platform, even when the lifting platform is at its lowest position, the scissor arms still occupy a certain space below the platform, resulting in a relatively high height when the entire device is retracted. This structural feature makes it inconvenient to operate such lifts when handling heavy or difficult-to-move goods, as the platform cannot be fully lowered to the ground, affecting loading and unloading efficiency and user experience.

[0004] Currently, traditional hydraulic scissor lifts typically require digging a pit in the ground to place the scissor arms inside, allowing the lifting platform to descend to the ground at its lowest position. However, this places high demands on the installation environment of hydraulic scissor lifts, limiting their applicability in some work environments where digging a pit is not possible or where the lift can only be temporarily installed.

[0005] Therefore, there is an urgent need in the existing technology for a hydraulic scissor lift mechanism that can be easily deployed on the ground, effectively reduce the folding height, and facilitate the loading and unloading of goods. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a lifting mechanism of a hydraulic lift, comprising two sets of symmetrically arranged scissor mechanisms, a lifting platform being provided on the upper part of the two sets of scissor mechanisms through a connecting mechanism, and two base strips being provided on the lower part of the two sets of scissor mechanisms through a sliding mechanism.

[0007] The connecting mechanism includes a base plate connected to the upper part of the scissor mechanism. The base plate rises and falls with the extension and retraction of the corresponding scissor mechanism. One end of a connector is rotatably provided on the side of the two base plates that are close to each other. The other end of the connector is rotatably connected to the edge of the lifting platform. A drive component for synchronously rotating the two connectors is provided on the base plate.

[0008] When loading goods, the sliding mechanism drives two base plates to move away from and closer to each other through two sets of scissor mechanisms. In addition, the drive component drives the connecting parts to rotate, thereby moving the lifting platform downward between the two sets of scissor mechanisms. This allows the lifting platform to descend to the ground without the need to dig a pit, making it convenient to transport goods onto the lifting platform for lifting.

[0009] Preferably, the base strip is detachably fixed to the ground by bolts, and the two base strips have an inclined structure on the side that is far apart from each other.

[0010] Preferably, the sliding mechanism includes an L-shaped sliding plate, the transverse section of which is slidably connected to a corresponding base strip, and the upper side of the longitudinal section of which is connected to a corresponding set of scissor mechanisms.

[0011] Preferably, a threaded rod is rotatably provided on the inner side of the base strip, and the threaded rod is threadedly connected to the transverse section of the sliding plate at the corresponding position. A reduction motor for driving the threaded rod is fixedly installed at the left end of the base strip.

[0012] Preferably, the scissor mechanism includes several sets of intersecting scissor arms, each set of scissor arms intersecting at the midpoint and rotatably connected by a pin, forming a relatively rotatable X-shaped frame, with the upper and lower sets of intersecting scissor arms rotatably connected to each other by a connecting shaft.

[0013] Preferably, the front end of the uppermost set of scissor arms is connected to the substrate groove via a corresponding connecting shaft, and the rear end is rotatably connected to the substrate via a corresponding connecting shaft. The front end of the lowermost set of scissor arms is rotatably connected to the horizontal section of the sliding plate via a corresponding connecting shaft, and the rear end is connected to the horizontal section groove of the sliding plate via a corresponding connecting shaft.

[0014] Preferably, a section of the sliding plate is rotatably connected to a hydraulic cylinder on its upper side of the transverse section, and the other end of the hydraulic cylinder is rotatably connected to the lowest pin.

[0015] Preferably, the sliding plate is rotatably provided with a plurality of rollers, and when the base strip is installed on the ground, the rollers roll on the ground to support the sliding plate.

[0016] Preferably, the connector consists of two rotating shafts that are rotatably connected to the base plate and the lifting platform respectively, and an arm plate for fixing the two ends of the two rotating shafts.

[0017] Preferably, the drive assembly includes a worm gear fixedly mounted on the outside of a rotating shaft located on the substrate, a worm for driving the worm gear rotatably mounted on the substrate, and a synchronous motor for driving the worm fixedly mounted on the lower side of the substrate.

[0018] The beneficial effects of the present invention are as follows: First, the present invention uses a sliding mechanism to drive two base plates to move away from and closer to each other through two sets of scissor mechanisms. Then, in conjunction with the drive assembly, the lifting platform is driven to move downward between the two sets of scissor mechanisms through the connecting parts. This allows the lifting platform to descend to the ground without digging a pit for convenient loading and unloading operations. This reduces the installation environment requirements of the hydraulic scissor lift and improves its convenience and adaptability in various site layouts.

[0019] Second, the present invention uses two sets of scissor mechanisms to drive two base plates to move closer to each other and finally abut against the lower part of the lifting platform when the lifting platform lifts the goods, forming a stable support structure. This ensures that the lifting platform can rise smoothly and reliably. At the same time, the rollers at the bottom of the sliding plate roll on the ground, achieving low friction and smooth movement of the sliding plate, further ensuring the stability and safety of the lifting platform during the lifting process.

[0020] Third, the present invention adopts a detachable and fixed base strip that can be installed on the ground, which can conveniently fix and adjust the position of the entire lifting mechanism. This allows for flexible and convenient replacement of the working position of the lifting platform according to operational needs. In addition, by setting the side of the two base strips that are far apart from each other as an inclined structure, obstacles can be effectively reduced, making it easier for goods to move smoothly onto the lifting platform through the base strips, thus improving the efficiency and convenience of loading and unloading operations. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a first structural schematic diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the second structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the structure of the sliding plate, scissor arm, base plate and connector in this invention.

[0025] Figure 4 This is a partial cross-sectional view of the connector, drive assembly, substrate, and scissor arm in this invention.

[0026] Figure 5 This is a partial cross-sectional view of the lifting platform, base plate, and connecting parts in this invention.

[0027] Figure 6 This is a partial sectional view of the sliding plate, threaded rod, and geared motor in this invention.

[0028] Figure 7 This is a diagram showing the state changes of the lifting platform as it moves from the base plate to the ground in this invention.

[0029] In the diagram: 1. Scissor lift mechanism; 2. Connecting mechanism; 3. Lifting platform; 4. Sliding mechanism; 5. Base bar; 11. Scissor arm; 12. Pin; 13. Connecting shaft; 14. Hydraulic cylinder; 21. Base plate; 22. Connecting component; 23. Drive assembly; 41. Sliding plate; 42. Threaded rod; 43. Gear motor; 221. Rotating shaft; 222. Arm plate; 231. Worm gear; 232. Worm; 233. Synchronous motor; 411. Roller. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0031] See Figure 1 and Figure 2 A lifting mechanism for a hydraulic lift includes two sets of scissor lift mechanisms 1 arranged symmetrically from left to right. The upper part of the two sets of scissor lift mechanisms 1 is connected by a lifting platform 3 through a connecting mechanism 2. The lower part of the two sets of scissor lift mechanisms 1 is connected by a sliding mechanism 4 and has two base bars 5 arranged symmetrically from front to back.

[0032] See Figure 1 , Figure 2 , Figure 4 and Figure 5 The connecting mechanism 2 includes a base plate 21 connected to the upper part of the scissor mechanism 1. The base plate 21 rises and falls with the extension and retraction of the corresponding scissor mechanism 1. One end of the connector 22 is rotatably provided on the side of the two base plates 21 that is close to each other. The other end of the connector 22 is rotatably connected to the edge of the lifting platform 3. The base plate 21 is provided with a drive assembly 23 for synchronously rotating the two connectors 22.

[0033] See Figure 1 , Figure 2 , Figure 3 and Figure 6 The sliding mechanism 4 includes an L-shaped sliding plate 41. The transverse section of the sliding plate 41 is slidably connected to the corresponding base strip 5. The upper side of the longitudinal section of the sliding plate 41 is connected to a corresponding set of scissor mechanisms 1. A threaded rod 42 is rotatably provided on the inner side of the base strip 5. The threaded rod 42 is threadedly connected to the transverse section of the sliding plate 41 at the corresponding position. A reduction motor 43 for driving the threaded rod 42 is fixedly installed at the left end of the base strip 5.

[0034] See Figure 1 , Figure 2 and Figure 3The scissor mechanism 1 includes several sets of intersecting scissor arms 11. The midpoints of each set of scissor arms 11 intersect and are rotatably connected by a pin 12 to form an X-shaped frame that can rotate relative to each other. The upper and lower sets of intersecting scissor arms 11 are rotatably connected to each other by a connecting shaft 13.

[0035] See Figure 1 , Figure 2 and Figure 3 The front end of the uppermost set of scissor arms 11 is connected to the slot of the substrate 21 via the corresponding connecting shaft 13, and the rear end is rotatably connected to the substrate 21 via the corresponding connecting shaft 13. The front end of the lowermost set of scissor arms 11 is rotatably connected to the horizontal section of the sliding plate 41 via the corresponding connecting shaft 13, and the rear end is connected to the slot of the horizontal section of the sliding plate 41 via the corresponding connecting shaft 13.

[0036] See Figure 2 , Figure 4 and Figure 5 The connector 22 consists of two rotating shafts 221 that are rotatably connected to the base plate 21 and the lifting platform 3 respectively, and an arm plate 222 for fixing the two ends of the rotating shafts 221.

[0037] See Figure 4 and Figure 7 The drive assembly 23 includes a worm gear 231 fixedly mounted on the outside of a rotating shaft 221 located on a substrate 21, a worm 232 rotatably mounted on the substrate 21 for driving the worm gear 231, and a synchronous motor 233 for driving the worm 232 fixedly mounted on the lower side of the substrate 21.

[0038] When it is necessary to lift the goods, the geared motor 43 and the synchronous motor 233 are started first, so that the geared motor 43 drives the two threaded rods 42 to rotate synchronously in opposite directions, thereby causing the threaded rods 42 to drive the two sliding plates 41 to move away from each other synchronously. The sliding plates 41 drive the two base plates 21 to move away from each other synchronously through the scissor arm 11.

[0039] Simultaneously, the synchronous motor 233 drives the worm gear 231 to rotate via the worm 232, and the worm gear 231 drives the rotating shaft 221 to rotate, causing the two connecting parts 22 to swing in opposite directions. The end of the connecting part 22 connected to the lifting platform 3 swings upward, and then swings away from the base plate 21. This causes the connecting part 22 to drive the lifting platform 3 to move upward first, and then move between the two base plates 21. Subsequently, the lifting platform 3 moves downward between the two base plates 21 to the ground.

[0040] It should be noted that when the lifting platform 3 is located between the two base plates 21 and the connecting piece 22 is arranged horizontally, if the lifting platform 3 continues to move downward, the reduction motor 43 needs to be reversed so that the two sliding plates 41 move closer to each other synchronously, thereby enabling the lifting platform 3 to continue to move downward.

[0041] It should be emphasized that the starting and rotation speeds of the geared motor 43 and the synchronous motor 233 are matched and adjusted by those skilled in the art so that the sliding of the two sliding plates 41 and the up-and-down movement of the lifting platform 3 can be matched with each other. Furthermore, by increasing the number of worm gears 232, worm wheels 231 and synchronous motors 233, the present invention can increase the torque on the connecting member 22, thereby providing the maximum load required to lift the lifting platform 3.

[0042] Next, the operator moves the goods to be lifted onto the lifting platform 3, and then reverses the operation of the reduction motor 43 and the synchronous motor 233, with the same principle as above, and simultaneously extends the telescopic sections of the two hydraulic cylinders 14, so that the hydraulic cylinders 14 push the lowest pin 12 upward, thereby causing the pin 12 to lift the base plate 21 through the scissor arm 11. The base plate 21 drives the lifting platform 3 to move upward through the connecting piece 22. At the same time, the upward movement of the lifting platform 3 relative to the base plate 21 causes the lifting platform 3 to lift the goods.

[0043] When the lifting platform 3 moves to the initial position, the lower part of the lifting platform 3 abuts against the upper part of the base plate 21, so that the base plate 21 provides stable support for the lifting platform 3, thereby ensuring that the lifting platform 3 can be arranged when it is raised to a suitable position, and thus the goods on the lifting platform 3 can be moved stably.

[0044] To facilitate the movement of the lifting platform 3 and to make it easier to move goods onto the lifting platform 3, the present invention provides the following structure: (See attached diagram) Figure 1 , Figure 2 and Figure 7 The base strip 5 is detachably fixed to the ground by bolts, and the two base strips 5 have an inclined structure on the side that is far away from each other.

[0045] By moving the base bar 5, the lifting platform 3 is moved to a suitable position, and the base bar 5 is fixed to the ground with bolts. When loading goods, the inclined structure on the base bar 5 makes it easier to move the goods to the top of the lifting platform 3.

[0046] To reduce friction when the sliding plate 41 moves and ensure the stability and safety of the lifting platform 3 during the lifting process, the present invention provides the following structure: (See attached diagram) Figure 1 , Figure 2 and Figure 3 Several rollers 411 are rotatably mounted on the sliding plate 41. When the base strip 5 is installed on the ground, the rollers 411 roll on the ground to support the sliding plate 41. The rollers 411 at the bottom of the sliding plate 41 roll on the ground, realizing the smooth movement of the sliding plate 41 and further realizing the stable movement of the lifting platform 3.

[0047] This invention uses two base plates 21 that move away from and closer to each other, along with a connecting piece 22, to move the lifting platform 3 up and down. This allows the lifting platform 3 to descend to the ground level without digging a pit, greatly reducing the installation environment requirements of the hydraulic scissor lift and improving its convenience and adaptability in various locations. Although it adds an extra structure to the traditional hydraulic scissor lift, it achieves convenient installation and loading of goods, thus improving the applicability of this invention to more scenarios.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A lifting mechanism of a hydraulic lift comprising two sets of scissors mechanisms arranged symmetrically left and right, characterized in that, The upper parts of the two sets of scissor mechanisms are provided with lifting platforms through a connecting mechanism, and the lower parts of the two sets of scissor mechanisms are provided with two front and rear symmetrical base strips through a sliding mechanism. The connecting mechanism comprises base plates connected to the upper parts of the scissor mechanisms, the base plates are lifted along with the movement of the corresponding scissor mechanisms, one end of a connecting piece is rotationally arranged on the side of the two base plates close to each other, the other end of the connecting piece is rotationally connected to the edge of the lifting platform, and a driving assembly for synchronously rotating the two connecting pieces is arranged on the base plates. During operation, the sliding mechanism drives the two base plates to move away from or close to each other through the two sets of scissor mechanisms, and then the driving assembly drives the lifting platform to move downward to the ground between the two sets of scissor mechanisms through the connecting piece.

2. A lifting mechanism for a hydraulic lift according to claim 1, wherein The base strips are detachably fixedly installed on the ground through bolts, and the sides of the two base strips away from each other are inclined.

3. A lifting mechanism for a hydraulic lift according to claim 1, wherein The sliding mechanism comprises an L-shaped sliding plate, the horizontal section of the sliding plate is slidably connected to the corresponding base strip, and the vertical section of the sliding plate is connected to the corresponding set of scissor mechanisms.

4. A lifting mechanism for a hydraulic lift according to claim 3, wherein A threaded rod is rotationally arranged in the inner side of the base strip, the threaded rod is threadedly connected to the horizontal section of the corresponding sliding plate, and a speed reducer motor for driving the threaded rod is fixedly installed at the left end of the base strip.

5. A lifting mechanism for a hydraulic lift according to claim 3, wherein The scissor mechanism comprises a plurality of sets of intersecting scissors arms, the middle points of each set of scissors arms are intersected and rotationally connected through a pin shaft, forming an X-shaped frame that can rotate relative to each other, and the upper and lower sets of intersecting scissors arms are rotationally connected to each other through connecting shafts.

6. A lifting mechanism for a hydraulic lift according to claim 5, wherein, The front end of the uppermost set of scissors arms is connected to the base plate slot through the corresponding connecting shaft, and the rear end is rotationally connected to the base plate through the corresponding connecting shaft, the front end of the lowermost set of scissors arms is rotationally connected to the horizontal section of the sliding plate through the corresponding connecting shaft, and the rear end is connected to the horizontal section of the sliding plate slot through the corresponding connecting shaft.

7. A lifting mechanism for a hydraulic lift according to claim 5, wherein The horizontal section of the sliding plate is rotationally connected to one section of a hydraulic cylinder, and the other end of the hydraulic cylinder is rotationally connected to the lowermost pin shaft.

8. A lifting mechanism for a hydraulic lift according to claim 3, wherein, A plurality of rollers are rotationally arranged on the sliding plate, when the base strip is installed on the ground, the rollers roll on the ground to support the sliding plate.

9. The lift mechanism of claim 1, wherein, The connecting piece is composed of two rotating shafts rotationally connected to the base plate and the lifting platform and an arm plate for fixedly connecting the two ends of the two rotating shafts.

10. A lifting mechanism for a hydraulic lift according to claim 9, wherein The driving assembly comprises a worm wheel fixedly installed outside the rotating shaft at the base plate, a worm shaft for driving the worm wheel is rotationally arranged on the base plate, and a synchronous motor for driving the worm shaft is fixedly installed on the lower side of the base plate.

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