A hydraulic elevator

Abstract

The present application relates to the technical field of elevator, and specifically proposes a hydraulic elevator, which comprises a mounting base fixed on the ground, the surface of the mounting base is equipped with a multi-section hydraulic rod and a guide frame one, the end of the hydraulic rod is fixedly installed with a workbench through a connecting frame, the surface of the guide frame one is misalignedly equipped with a guide frame two, the inside of the guide frame two is equipped with a slanting support frame one for providing support and protection for the last-stage rod of the hydraulic rod, and the support frame one is equipped on the surface of a linear bearing; the movable support frame one and the support frame two are arranged, a plurality of support points of the cantilever beam of the hydraulic rod are increased, and support is provided from multiple directions and dimensions, so that the generation of lateral force is effectively inhibited, the stability is improved, the anti-falling assembly at the end of the support frame one can also ensure the safety of the piston rod at the top of the hydraulic rod, dynamic stability control and ultimate safety protection are integrated, and the comprehensive safety performance of the hydraulic rod elevator is greatly improved.

Description

Technical Field

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

[0002] Hydraulic lifts, as a common type of vertical transportation equipment, are widely used in construction, maintenance, warehousing, and industrial production lines. Multi-section hydraulic lifts, with their high lifting height and compact structure, have become an indispensable piece of equipment in vertical transportation.

[0003] However, when the piston rod of a multi-section hydraulic lift extends section by section, especially when it reaches the maximum working height, the entire piston rod system forms a slender cantilever beam structure. In this state, if the load on the lifting platform is slightly uneven or subjected to external lateral forces (such as wind, minor equipment collisions, or personnel operating with uneven loads), the top of the piston rod will produce significant lateral swaying. This swaying not only affects the stability of the working platform, but in extreme cases, it may even pose a huge safety hazard of the entire machine becoming unstable or overturning. Moreover, the safety design of existing lifts is mostly focused on overpressure protection such as the overflow valve of the hydraulic system. If the hydraulic system suddenly fails (such as a hose bursting or a joint coming loose), resulting in an instantaneous uncontrolled fall, the piston rod will quickly retract under the action of the load, and the lifting platform and its load will fall from a height, thus posing a great safety hazard.

[0004] Therefore, there is an urgent need for a hydraulic lift that can effectively suppress lateral swaying during high-altitude operations and provide a direct and reliable active fall protection safety barrier. Summary of the Invention

[0005] To address the aforementioned problems, the present invention provides a hydraulic lift, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a hydraulic lift, comprising a mounting base fixed to the ground, a multi-section hydraulic rod mounted on the surface of the mounting base and guide frames located on both sides of the mounting base, a worktable fixedly mounted at the end of the hydraulic rod via a connecting frame, the connecting frame slidably mounted inside the guide frame, and a side top rod sliding inside the guide frame being mounted on the top of the hydraulic rod; a second guide frame is offsetly mounted on the surface of the first guide frame, and a support frame is obliquely arranged inside the second guide frame to provide support and protection for the final stage of the hydraulic rod, a linear bearing is slidably sleeved in the middle of the final stage of the hydraulic rod, and the support frame is mounted on the surface of the linear bearing. A connecting assembly for improving the stability of support frame one is installed between support frame one and the side top rod; an anti-fall assembly is installed at the end of support frame one; support frame two is installed inside guide frame two to provide support and protection for the intermediate rod of the hydraulic rod, and a lifting assembly for driving support frame two to move is installed on the surface of support frame two; the position of support frame one is adjusted by the connecting assembly to provide first-level support and protection for the final rod of the hydraulic rod, the connecting assembly and support frame one form a second-level support and protection for the final rod of the hydraulic rod, and the position of support frame two is adjusted by the lifting assembly to move to the middle of the intermediate rod of the hydraulic rod to provide third-level support and protection, forming a three-dimensional stable support structure.

[0007] Preferably, the connecting assembly includes two screws rotatably mounted on the surface of the side top rod. The surface of the screw is fitted with a movable block that moves along the axial direction of the screw. The surface of the movable block is fitted with a connecting rod, and the connecting rod is fixedly connected to the support frame.

[0008] Preferably, the fall arrestor includes multiple slots provided on the surface of the guide frame two, and the end of the support frame one is equipped with a locking block for locking inside the slot, and the end of the support frame one is equipped with a pushing component for driving the locking block to move.

[0009] Preferably, the pushing component includes a groove formed at one end of the support frame, and a cam driven by a motor is fitted inside the groove, the cam abutting against the surface of the locking block.

[0010] Preferably, the surface of the card block is provided with a guide groove, and a guide block is assembled inside the groove, with the guide block being movably installed inside the guide groove.

[0011] Preferably, the inner wall of the card slot is set as a symmetrical bevel, and the inside of the card slot is equipped with a rubber pad for increasing friction. The shape of the card block is adapted to the shape of the inner wall of the card slot.

[0012] Preferably, the lifting assembly includes a pull rope for pulling the second support frame, the top of the second support frame is equipped with a pulley for guiding the pull rope, and the surface of the mounting base is equipped with a mechanism for winding and unwinding the pull rope.

[0013] Preferably, the second support frame includes a crossbar frame slidably assembled inside the second guide frame. The surface of the crossbar frame is fitted with obliquely arranged support rods. The ends of the support rods are rounded and abut against the middle of the intermediate rod of the hydraulic rod. The support rods can slide along the surface of the crossbar frame.

[0014] Preferably, the crossbar frame is internally equipped with a rotatable screw rod II, and the surface of the screw rod II is threaded with a connecting block that moves inside the crossbar frame. The connecting block is fixedly connected to the support rod.

[0015] The above technical solution has the following advantages or beneficial effects: 1. The present invention provides a hydraulic lift, which, by setting a movable support frame one and a support frame two, increases the number of support points for the hydraulic rod cantilever beam and provides support from multiple directions, effectively suppressing the generation of lateral forces. This not only improves stability, but also ensures the safety of the piston rod at the top of the hydraulic rod by the anti-fall component at the end of the support frame one. It deeply integrates dynamic stability control and ultimate safety protection, resulting in a significant improvement in the overall safety performance of the hydraulic lift.

[0016] 2. This invention provides a hydraulic lift that, through the coordinated action of two support points, support frame one and support frame two, can simultaneously provide lateral support to the top and middle of the piston rod. The top support directly constrains the displacement of the piston rod's end below the worktable, effectively resisting lateral forces from the load and ensuring the stability of the worktable. The middle support significantly shortens the effective bending length of the piston rod, improving its overall structural rigidity and critical load resistance to buckling (instability), thereby ensuring stability.

[0017] 3. This invention provides a hydraulic lift that, by setting up an anti-fall component, can quickly sense and trigger a mechanical self-locking mechanism the instant the hydraulic system fails and the piston rod begins to fall abnormally. The locking block can quickly engage with the inside of the locking slot, and through the continuously increasing friction and bottom buffer, it can safely and effectively achieve emergency braking, thus maximizing the safety of personnel and equipment. Attached Figure Description

[0018] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0019] Figure 1 This is a three-dimensional structural diagram of a hydraulic lift provided by the present invention.

[0020] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure on the back.

[0021] Figure 3 This is a three-dimensional structural diagram showing the installation state of support frame one and support frame two.

[0022] Figure 4 This is a three-dimensional structural diagram of support frame one.

[0023] Figure 5 yes Figure 4 A cross-sectional view of the card block location.

[0024] Figure 6 This is a three-dimensional structural diagram of support frame two.

[0025] Figure 7 This is a 3D structural diagram of the card slot location.

[0026] Figure 8 This is a three-dimensional structural diagram of the pushing component.

[0027] In the diagram: 1. Mounting base; 2. Hydraulic rod; 3. Guide frame one; 4. Connecting frame; 5. Connecting assembly; 51. Screw one; 52. Moving block; 53. Connecting rod; 6. Side top rod; 7. Anti-fall assembly; 71. Slot; 72. Slot block; 73. Pushing assembly; 731. Groove; 732. Motor; 733. Cam; 8. Support frame two; 81. Crossbar frame; 82. Support rod; 83. Screw two; 84. Connecting block; 9. Lifting assembly; 91. Pull rope; 92. Pulley; 10. Guide frame two; 11. Support frame one; 12. Workbench; 13. Linear bearing; 14. Guide groove; 15. Guide block; 16. Rubber pad. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1This is a hydraulic lift primarily used for the longitudinal transport of goods. This particular hydraulic lift is a multi-section type, fixed to the ground and wall using expansion bolts. Its overall height is over three meters. It includes a mounting base 1 fixed to the ground with expansion bolts, and a flexible pad (not shown in the figure) on the lower surface of the mounting base 1 to reduce rigid contact with the ground. A multi-section hydraulic rod 2 is fixed to the upper surface of the mounting base 1 via a base (not shown in the figure). The sides of the mounting base 1 are fixed with bolts. The hydraulic rod 2 is equipped with a guide frame 3, which is a multi-section C-shaped steel connected by bolts. The top of the hydraulic rod 2 is fitted with a side push rod 6 that slides inside the guide frame 3. Since the side push rod 6 slides inside the guide frame 3, it can ensure the stability of the end of the hydraulic rod 2 to a certain extent. The end of the hydraulic rod 2 is fixedly installed with a worktable 12 through a connecting frame 4. That is, the connecting frame 4 is fixed to the surface of the side push rod 6 and the connecting frame 4 is slidably installed inside the guide frame 3. When the hydraulic rod 2 extends or retracts, its end drives the worktable 12 to move longitudinally through the side push rod 6 and the connecting frame 4.

[0031] like Figure 1 and Figure 2 As shown, a guide frame 2 10 is misaligned and mounted on the surface of guide frame 3. Guide frame 2 10 is the same as guide frame 3, and is also fixedly connected by multiple C-shaped steels and bolts. The installation direction of guide frame 2 10 is perpendicular to the direction of the line connecting the two guide frames 3. Inside guide frame 2 10, a support frame 11 is installed at an angle to provide support and protection for the final stage rod of hydraulic rod 2. At this time, support frame 11 can provide support force in a plane different from the side top rod 6. A linear bearing 13 is slidably sleeved in the middle of the final stage rod of hydraulic rod 2. Support frame 11 is mounted on the surface of linear bearing 13. This support position is located in the middle of the final stage rod of hydraulic rod 2. Therefore, it can effectively suppress lateral swaying during high-altitude operations in terms of both space and quantity, and improve the stability of workbench 12. A connecting component 5 is installed between support frame 11 and side top rod 6 to improve the connection tightness between support frame 11 and side top rod 6, thereby further improving the stability of support frame 11.

[0032] like Figure 1 and Figure 3As shown, the connecting assembly 5 includes two screws 51 rotatably mounted on the surface of the side push rod 6. The two screws 51 are symmetrically mounted on the surface of the side push rod 6. To ensure the stability of the screws 51, a C-shaped bracket (not shown in the figure) is fixedly mounted on the surface of the side push rod 6 by bolts. The screws 51 are rotatably mounted inside the C-shaped bracket to ensure the stability of the force on the screws 51 during rotation. A drive motor (not shown in the figure) is correspondingly mounted on the end of the screws 51, so that the two screws 51 rotate simultaneously. A moving block 52 that moves along the axial direction of the screws 51 is fitted on the surface of the screws 51. That is, the moving block 52 is threaded onto the surface of the screws 51. A connecting rod 53 is fixedly fitted on the surface of the moving block 52. The connecting rod 53 is fixedly connected to the support frame 11. At this time, the support frame 11 and the side push rod 6 form a rigid installation connection.

[0033] The drive motor rotates, causing the corresponding screw 51 to rotate. Through the limiting action of the support frame 11, the moving block 52 can move along the axial direction of the screw 51. When the screw 51 stops rotating, the position of the moving block 52 can be self-locked, thereby adjusting the position of the linear bearing 13 and supporting any position on the surface of the final stage rod of the hydraulic rod 2, further improving the risk resistance of the final stage rod and ensuring the stability of the support frame 11.

[0034] To prevent the workbench 12 from falling due to a sudden failure of the hydraulic system, the end of the support frame 11 is equipped with a fall protection component 7, which provides a direct and reliable active fall protection safety barrier to ensure safety.

[0035] like Figures 3-5 and Figures 7-8 As shown, the fall arrestor 7 includes multiple slots 71 formed on the surface of the guide frame 2 10. In this embodiment, each C-shaped steel surface of the guide frame 2 10 has two slots 71. The end of the support frame 1 1 is equipped with a locking block 72 for locking inside the slot 71. It should be noted that the length of the slot 71 is greater than the length of the locking block 72. The end of the support frame 1 1 is equipped with a pushing component 73 for driving the locking block 72 to move. The pushing component 73 is used to push the locking block 72 into the slot 71. The pushing component 73 includes an inertial sensor (not shown in the figure) that can detect continued falling. When the inertial sensor detects falling, it will transmit a signal to the corresponding controller. The controller controls the movement of the pushing component 73. The entire control process is prior art and will not be described in detail in this solution.

[0036] If the final stage of hydraulic rod 2 suddenly drops, the inertial sensor detects the signal, and the pushing assembly 73 will push the locking block 72 to move. During the fall, as soon as the locking block 72 passes through the moving path of the locking groove 71, the locking block 72 will be immediately squeezed out until the locking block 72 moves down and abuts the bottom of the inner wall of the corresponding locking groove 71. In order to reduce the impact force caused by gravity during the fall, the inner wall of the locking groove 71 is set as a symmetrical inclined surface, and the inside of the locking groove 71 is equipped with a rubber pad 16 to increase the friction. The shape of the locking block 72 is adapted to the shape of the inner wall of the locking groove 71. After the locking block 72 moves, it will cause the locking block 72 and the inclined surface of the locking groove 71 to be pressed more tightly. At this time, the friction between the two will be greater. At the same time, the rubber pad 16 that increases the friction can effectively slow down the falling speed. At the same time, a rubber pad 16 is also set at the bottom of the inner wall of the locking groove 71 for cushioning, thereby reducing the impact force and further improving the fall protection safety.

[0037] In this embodiment, the pushing component 73 includes a groove 731 formed at the end of the support frame 11. A cam 733, which is rotated by a motor 732, is installed inside the groove 731. The motor 732 is fixed inside the groove 731 by a base. The cam 733 abuts against the surface of the locking block 72. A guide groove 14 is formed on the surface of the locking block 72. The guide groove 14 guides the movement direction of the locking block 72. A guide block 15 is installed inside the groove 731. The guide block 15 is fixedly welded inside the groove 731 and is movably installed inside the guide groove 14. When the motor 732 is started, it can drive the cam 733 to rotate. The cam 733 abuts against the surface of the locking block 72, causing the locking block 72 to move until it is locked inside the groove 71.

[0038] like Figures 1-3 and Figure 6 As shown, the guide frame 2 10 is internally equipped with a support frame 2 8 that provides support and protection for the intermediate rod of the hydraulic rod 2. The surface of the support frame 2 8 is equipped with a lifting assembly 9 for driving the support frame 2 8 to move. The lifting assembly 9 includes a pull rope 91 for pulling the support frame 2 8. The pull rope 91 and the support frame 2 8 are connected by a lifting ring (not shown in the figure). The top of the support frame 2 8 is equipped with a pulley 92 for guiding the pull rope 91. In this embodiment, two pulleys 92 are provided on the surface of each support frame 2 8. The surface of the mounting base 1 is equipped with a mechanism (not shown in the figure) for winding and unwinding the pull rope 91, such as a commonly used winch. Since only the support frame 2 8 needs to be pulled, the winding and unwinding mechanism does not need to bear a large load.

[0039] Support frame 2 8 includes a crossbar frame 81 slidably assembled inside guide frame 2 10. The surface of the crossbar frame 81 is provided with a transverse groove, and an obliquely arranged support rod 82 is mounted on the surface of the crossbar frame 81. The end of the support rod 82 is arc-shaped and abuts against the middle of the intermediate rod of the hydraulic rod 2. The support rod 82 and the crossbar frame 81 form a more stable triangular support structure for the hydraulic rod 2. By adding multiple support points, the support stability of the hydraulic rod 2 is further improved, thereby more effectively suppressing lateral swaying. The support rod 82 can move along the surface of the crossbar frame 81. The crossbar frame 81 has a sliding surface. Inside the cross groove, there is a rotatable screw 83. The two ends of the screw 83 have different thread directions. The surface thread of the screw 83 is fitted with a connecting block 84 that moves inside the crossbar frame 81. The two connecting blocks 84 move in opposite directions. The connecting blocks 84 are fixedly connected to the support rod 82. An electric motor (not shown in the figure) is installed at the end of the crossbar frame 81. The electric motor drives the screw 83 to rotate, thereby driving the connecting blocks 84 to move the support rod 82 until the support rod 82 abuts against the surface of the intermediate rod of the hydraulic rod 2.

[0040] It should be noted that the movement of support rod 82 away from hydraulic rod 2, and the movement of support frame 11 to the top of hydraulic rod 2, are both to facilitate the complete retraction of hydraulic rod 2 and reduce the overall space occupied by the multi-stage hydraulic lift.

[0041] When the hydraulic lift of the present invention is in use, the last stage rod of the hydraulic rod 2 extends first. At this time, the drive motor rotates and drives the corresponding screw 51 to rotate. Through the limiting action of the support frame 11, the moving block 52 can move along the axial direction of the screw 51. The moving block 52 drives the support frame 11 to move to the middle position of the last stage rod for support through the connecting rod 53. When the middle stage rod of the hydraulic rod 2 extends, the pull rope 91 pulls the support frame 8 to move to the middle position of the extended section. At this time, the electric motor drives the screw 83 to rotate, thereby driving the connecting block 84 to move the support rod 82 until the support rod 82 abuts against the surface of the middle stage rod of the hydraulic rod 2 for support.

[0042] It should be noted that although existing hydraulic lifts also have support structures, such as side support rods 6, which have a certain effect in suppressing lateral forces, their resistance to lateral forces is relatively weak. Furthermore, the piston rod of the hydraulic rod 2 remains a relatively long cantilever beam structure throughout the process, resulting in poor overall stability. In this solution, by adding support frame one 11 and support frame two 8, the cantilever beam structure is provided with multi-stage support. Support frame one 11 and support frame two 8 themselves also possess strong stability, thus effectively improving the suppression of lateral forces and further enhancing stability. Additionally, anti-fall components 7 are added to the ends of the corresponding support frame two 8, effectively improving the safety of the hydraulic lift. While this invention adds support frame one 11 and support frame two 8 compared to existing technologies, these are conventional mechanical structures without any high-cost precision parts. Therefore, the cost of adding these structures is low, and they can be used repeatedly for a long time, significantly improving safety performance. The cost of adding these structures is negligible. The above technical solution of this invention is a specific improvement based entirely on the aforementioned existing technology and aimed at solving the technical problems.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "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 only for the convenience of describing this invention and simplifying the description, and do not 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.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A hydraulic lift characterized by: The application relates to a three-dimensional stable supporting structure, which comprises a mounting base fixed on the ground, a multi-section hydraulic rod and guide frames I arranged on the two sides of the mounting base, a workbench fixedly arranged at the end of the hydraulic rod, a connecting frame slidably arranged in the guide frame I, a side top rod slidably arranged on the top of the hydraulic rod, guide frames II arranged on the surface of the guide frames I, support frames I arranged in the guide frames II and used for supporting the last-stage rod of the hydraulic rod, linear bearings slidably sleeved on the middle part of the last-stage rod of the hydraulic rod, the support frames I arranged on the surface of the linear bearings, connecting assemblies arranged between the support frames I and the side top rod and used for improving the stability of the support frames I, falling-prevention assemblies arranged at the end of the support frames I, support frames II arranged in the guide frames II and used for supporting the middle-stage rod of the hydraulic rod, lifting assemblies arranged on the surface of the support frames II and used for driving the support frames II to move, the position of the support frames I adjusted through the connecting assemblies, the last-stage rod of the hydraulic rod provided with one-stage support protection, the connecting assemblies and the support frames I forming two-stage support protection for the last-stage rod of the hydraulic rod, the position of the support frames II adjusted through the lifting assemblies, the middle-stage rod of the hydraulic rod provided with three-stage support protection, and a three-dimensional stable supporting structure formed. The connecting assembly comprises two screw rods I rotatably arranged on the surface of the side top rod, moving blocks axially moving along the screw rods I arranged on the surface of the screw rods I, connecting rods arranged on the surface of the moving blocks and fixedly connected with the support frames I. The falling-prevention assembly comprises a plurality of clamping grooves arranged on the surface of the guide frames II, clamping blocks arranged at the end of the support frames I and clamped in the clamping grooves, and push-moving assemblies arranged at the end of the support frames I and used for driving the clamping blocks to move. The lifting assembly comprises a pulling rope used for pulling the support frames II, a pulley arranged on the top of the support frames II and used for guiding the pulling rope, and a mechanism arranged on the surface of the mounting base and used for winding and unwinding the pulling rope. The push-moving assembly comprises a groove arranged at the end of the support frames I, a cam arranged in the groove and driven by a motor, and the cam abutting against the surface of the clamping block. The surface of the clamping block is provided with a guide groove, and a guide block is arranged in the groove. The inner wall of the clamping groove is provided with a symmetrical inclined surface, and a rubber pad is arranged in the clamping groove and used for increasing friction. The support frames II comprise a horizontal rod frame slidably arranged in the guide frames II, support rods arranged on the surface of the horizontal rod frame and arranged in an inclined mode, the end of the support rods provided with a circular arc shape and abutting against the middle part of the middle-stage rod of the hydraulic rod, and the support rods capable of sliding along the surface of the horizontal rod frame.

2. A hydraulic lift according to claim 1, wherein: The horizontal rod frame is provided with a rotatable screw rod II, the surface of the screw rod II is provided with a connecting block movably arranged in the horizontal rod frame, and the connecting block is fixedly connected with the support rods.

3. A hydraulic lift according to claim 2, wherein: ​ 4. A hydraulic lift as claimed in claim 1, wherein: ​ 5. A hydraulic lift as claimed in claim 1, wherein: ​ 6. A hydraulic lift according to claim 5, wherein: ​

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