Lifting workbench for garden construction

Abstract

The utility model relates to the technical field of garden construction, specifically disclose a garden construction is with elevating platform, include: workstation, still include: connecting plate, connecting plate fixedly connected in the one side of workstation, fixed support, fixed support sets up in the one side of workstation, the inside rotation of fixed support is connected with driving gear, the tooth of driving gear is meshed with movable rack, movable rack sets up in the bottom of connecting plate, the utility model discloses the linkage drive of connecting plate - movable rack - gear - worm - worm wheel - screw rod, realize the dynamic adaptation of " the higher the lifting height of workstation, the farther the horizontal distance of support plate and support seat and workstation", when the gravity center is deviated and leads to the displacement of 300mm of workstation lifting, connecting plate moves with the workstation synchronously, drives movable rack meshing driving gear to rotate, drives screw rod axial extension after worm -wheel -gear deceleration and increasing torque, promotes driving plate and drives driven plate to unfold outward, makes support span and height synchronous increase.

Description

Technical Field

[0001] This utility model relates to the field of landscape construction technology, specifically a lifting work platform for landscape construction. Background Technology

[0002] In the field of landscape construction, scissor lifts are the core equipment for completing high-altitude operations. Their working height covers 0.5-12m and requires frequent switching between different heights. The support system of this type of equipment has a key mechanical characteristic: the higher the lifting height of the work platform, the greater the unfolding angle of the scissor boom, and the more significant the shift of the equipment's center of gravity away from the center of the base.

[0003] When the work platform is raised to a high height, the scissor boom can extend to an angle of over 45°. The weight of the work platform and the operator causes the center of gravity of the equipment to shift outward by more than 300mm. According to the mechanical model of scissor lift equipment, the support span (i.e., the horizontal distance between the support plate and the work platform) determines the anti-overturning capability. When the height increases significantly, the overturning moment can increase several times, while the fixed span cannot provide sufficient torque balance. The equipment is prone to exceeding the stability limit when there is wind interference or when the operator is operating sideways, resulting in the work platform tilting. Therefore, we propose a lifting work platform for garden construction. Utility Model Content

[0004] The purpose of this utility model is to provide a lifting work platform for garden construction, in order to solve the problem mentioned in the background art that when the height is greatly increased, the overturning moment can increase several times, while the fixed span cannot provide sufficient torque balance, and the equipment is prone to exceeding the stability limit when there is wind interference or when the operator is operating sideways, resulting in the work platform tilting.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lifting work platform for garden construction, comprising: a work platform;

[0006] It also includes: a connecting plate, which is fixedly connected to one side of the workbench;

[0007] A fixed frame is located on one side of the workbench. A drive gear is rotatably connected inside the fixed frame. A movable rack meshes between the teeth of the drive gear. The movable rack is located at the bottom of the connecting plate. A worm is provided at one end of the drive gear. A worm wheel meshes between the teeth of the worm. A lead screw is provided inside the worm wheel. A ball joint is fixedly connected to one end of the lead screw. A drive plate is rotatably connected to the surface of the ball joint. The lead screw pushes the drive plate to rotate through the ball joint.

[0008] The driven plate is rotatably connected to the bottom of the driving plate. A support plate is provided at the bottom of the driven plate. An electric cylinder is installed inside the driven plate and is fixedly connected to the top of the support plate. The electric cylinder pushes the support plate to move.

[0009] One end of the drive gear is fixedly connected to a connecting rod, which is fixedly connected to one end of the worm. A slider is fixedly connected inside the worm wheel, and the slider is slidably connected to the surface of the lead screw.

[0010] The top of the movable rack is fixedly connected to a synchronizing rod, which is fixedly connected to the bottom of the connecting plate.

[0011] The other end of the lead screw is fixedly connected to a guide plate, and one end of the guide plate is slidably connected to a first guide rail, which is fixedly connected inside the fixed frame.

[0012] The driven plate has an extension rod that is slidably connected inside. The extension rod is fixedly connected to the top of the support plate. The driven plate has a first slot that matches the extension rod.

[0013] The fixed frame has a second guide rail fixedly connected inside, and a limiting block is slidably connected to the surface of the second guide rail. A limiting plate is fixedly connected to one end of the limiting block, and the limiting plate is rotatably connected to one side of the driven plate.

[0014] The bottom of the support plate is rotatably connected to a support base, and a pressure sensor is installed at the bottom of the support base.

[0015] This utility model has at least the following beneficial effects:

[0016] This invention achieves dynamic adaptation by using a linkage transmission of connecting plate, moving rack, gear, worm gear, and lead screw to ensure that "the higher the worktable is raised, the farther the horizontal distance between the support plate and the support base and the worktable." When the worktable is raised and the center of gravity shifts by more than 300mm, the connecting plate moves synchronously with the worktable, causing the moving rack to mesh with the drive gear and rotate. After the worm gear reduces speed and increases torque, it drives the lead screw to extend axially, pushing the drive plate to drive the driven plate to unfold outward, so that the support span increases synchronously with the height. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the right-side cross-sectional structure of the fixing frame of this utility model;

[0020] Figure 4 This is a partial cross-sectional view of the fixing frame of this utility model from the left side.

[0021] Figure 5 This is a three-dimensional structural diagram of the active gear of this utility model;

[0022] Figure 6 This is a schematic diagram of the main cross-sectional structure of the driven plate of this utility model.

[0023] In the diagram: 1. Workbench; 2. Connecting plate; 3. Fixing frame; 4. Driving gear; 5. Moving rack; 6. Worm gear; 7. Worm wheel; 8. Lead screw; 9. Ball joint; 10. Driving plate; 11. Driven plate; 12. Support plate; 13. Electric cylinder; 14. Connecting rod; 15. Slider; 16. Guide plate; 17. First guide rail; 18. Extension rod; 19. Second guide rail; 20. Limiting block; 21. Limiting plate; 22. Support base. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1 to 6 This utility model provides a technical solution: a lifting work platform for garden construction, comprising: a work platform 1;

[0027] It also includes: a connecting plate 2, which is fixedly connected to one side of the workbench 1;

[0028] A fixed frame 3 is set on one side of the workbench 1. A drive gear 4 is rotatably connected inside the fixed frame 3. A movable rack 5 meshes between the teeth of the drive gear 4. The movable rack 5 is set at the bottom of the connecting plate 2. A worm gear 6 is set at one end of the drive gear 4. A worm wheel 7 meshes between the teeth of the worm gear 6. A lead screw 8 is set inside the worm wheel 7. A ball joint head 9 is fixedly connected to one end of the lead screw 8. A drive plate 10 is rotatably connected to the surface of the ball joint head 9. The lead screw 8 pushes the drive plate 10 to rotate through the ball joint head 9.

[0029] Driven plate 11 is rotatably connected to the bottom of drive plate 10. A support plate 12 is provided at the bottom of driven plate 11. An electric cylinder 13 is provided inside driven plate 11 and is fixedly connected to the top of support plate 12. The electric cylinder 13 pushes support plate 12 to move.

[0030] The workbench 1 serves as the basic load-bearing component of the device. One side of it is fixed to the connecting plate 2. When the scissor arm is raised and lowered, the subsequent transmission and support actions are triggered synchronously through the connecting plate 2. At the same time, it carries garden workers and tools (such as hedge trimmers and sprinkler guns).

[0031] One end of the connecting plate 2 is fixed to the side of the workbench 1 by bolts, and the other end extends to the top of the fixed frame 3. The bottom is fixed to the moving rack 5 by a synchronizing rod, serving as a "bridge" between the workbench 1 and the transmission assembly, and synchronously transmitting the lifting power of the workbench 1 to the drive plate 10 and the moving rack 5.

[0032] The fixed frame 3 is fixed to the side frame (non-lifting moving parts) of the workbench 1 by expansion bolts. Its position corresponds to the connecting plate 2, providing fixed support for all transmission components, ensuring the stability of the component positions during transmission, and avoiding transmission misalignment caused by vibration during garden operations. The drive gear 4 is rotatably connected to the bearing seat inside the fixed frame 3 through a bearing. Its tooth surface meshes with the moving rack 5. One end is fixed to the connecting rod 14 through a flat key, converting the linear motion of the moving rack 5 into rotational motion, providing power to the worm gear 6. The moving rack 5 is vertically arranged above the fixed frame 3, with its top... The worm gear 6 is fixed to the connecting plate 2 via a synchronizing rod and slides with the connecting plate 2. It drives the drive gear 4 to rotate through meshing. The worm gear 6 is a single-start worm gear 6, which is rotatably connected to the bearing seat inside the fixed frame 3 via a bearing. Its tooth surface meshes with the worm wheel 7, transmitting the rotational power of the drive gear 4 to the worm wheel 7. At the same time, it utilizes the self-locking characteristic that "the worm gear 6 drives the worm wheel 7, and the worm wheel 7 cannot drive the worm gear 6 in the opposite direction" to prevent subsequent components from moving in the opposite direction due to external forces (such as the load on the workbench 1), ensuring the stability of the support. The worm wheel 7 is rotatably connected to the worm wheel 7 seat inside the fixed frame 3 via a bearing. Its tooth surface meshes with the worm gear 6. The worm 6's high-speed rotation is converted to low-speed rotation via an interference fit through the central stepped hole, increasing torque and providing stable axial thrust to the lead screw 8. The external thread on the lead screw 8 engages with the internal thread of the slide block 15. One end is fixed to a ball joint head 9 by welding, and the other end is fixed to a guide plate 16 by bolts. Driven by the slide block 15, the ball joint head 9 extends / retracts axially, pushing the drive plate 10 to rotate, thus converting "axial power to angular power." The ball joint head 9 is an integral ball joint, fixed to the end of the lead screw 8 by welding. The spherical rotation surface is connected to the shaft... The ball joint at one end of the active plate 10 is rotatably connected (360° micro-adjustable angle) to adapt to the rotation angle of the active plate 10, preventing the lead screw 8 from being bent due to rigid connection, ensuring smooth power transmission, especially suitable for the multi-angle rotation requirements of the active plate 10 in garden operations. One end of the active plate 10 is connected to the lead screw 8 through the ball joint head 9, the middle is rotatably connected to the fixed frame 3 through a hinge, and the bottom is rotatably connected to the driven plate 11 through a hinge. Under the thrust of the lead screw 8, it rotates around the central fulcrum, converting axial power into rotational power to drive the driven plate 11, providing a basis for angle adjustment of the support components;

[0033] The driven plate 11 is hinged to the bottom of the driving plate 10 at its top, and hinged to the support plate 12 at its bottom. A limiting plate 21 is hinged to one side. The first internal slot slides into the extension rod 18, receiving the rotational power of the driving plate 10 and driving the support plate 12 to move synchronously. It also provides installation space for the electric cylinder 13 and the extension rod 18, serving as a "transfer component" for support movements. Initially perpendicular to the ground, it adapts to the initial support posture of the scissor lift equipment. The piston rod end of the electric cylinder 13 is fixed to the top of the support plate 12 with bolts, and... The bottom of the fixed extension rod 18 is in contact with the ground (or the support seat 22 in Embodiment 2), directly transmitting the supporting force. The anti-slip rubber pad increases the friction with the soft lawn of the garden and prevents slipping. The cylinder body of the electric cylinder 13 is fixed to the mounting seat inside the driven plate 11 by flange bolts. The end of the piston rod is fixed to the connecting seat at the top of the support plate 12 by threads, providing the power for the support plate 12 to move up and down. The support height is adjusted by the extension and retraction of the piston rod to adapt to uneven garden ground (such as slopes and steps). The self-locking function can prevent the support plate 12 from sliding down due to gravity.

[0034] One end of the drive gear 4 is fixedly connected to a connecting rod 14, which is fixedly connected to one end of the worm gear 6. A slider 15 is fixedly connected inside the worm wheel 7, and the slider 15 is slidably connected to the surface of the lead screw 8.

[0035] One end of the connecting rod 14 is fixedly connected to the shaft hole of the drive gear 4 via a flat key, and the other end is fixedly connected to the input end of the worm 6 via a flat key, so as to realize the synchronous rotation of the drive gear 4 and the worm 6 and transmit rotational power. The slider 15 is fixed to the center hole of the worm wheel 7 with an interference fit, and the internal thread is precisely matched with the external thread on the surface of the lead screw 8. When the worm wheel 7 rotates, the rotational motion is converted into the axial linear motion of the lead screw 8 through the threaded engagement (the lead screw 8 moves 1 lead for every 1 revolution of the worm wheel 7).

[0036] A synchronizing rod is fixedly connected to the top of the movable rack 5, and the synchronizing rod is fixedly connected to the bottom of the connecting plate 2.

[0037] Synchronous rods are symmetrically distributed at the bottom of the connecting plate 2. One end is fixed to the pre-set threaded hole at the bottom of the connecting plate 2 with a nut, and the other end is fixed to the top of the moving rack 5 with a nut. This ensures the synchronous movement of the moving rack 5 and the connecting plate 2, avoids the moving rack 5 from shifting due to force on one side, and prevents the workbench 1 from tilting. This meets the needs of "frequent fine-tuning of position" in garden operations.

[0038] The other end of the lead screw 8 is fixedly connected to a guide plate 16, and one end of the guide plate 16 is slidably connected to a first guide rail 17, which is fixedly connected inside the fixed frame 3.

[0039] The guide plate 16 is fixed to the end of the lead screw 8 away from the ball joint head 9 by bolts. The slider 15 is embedded in the groove of the first guide rail 17 and moves axially with the lead screw 8. By sliding the slider 15 in the first guide rail 17, the lead screw 8 can only move axially, avoiding radial offset or rotation of the lead screw 8, and ensuring the accurate rotation angle of the active plate 10. The first guide rail 17 is fixed to the inner wall of the fixing frame 3. The groove and the slider 15 of the guide plate 16 slide together to provide a sliding track for the guide plate 16, indirectly constraining the movement trajectory of the lead screw 8, ensuring transmission accuracy, and meeting the "precision support" requirements in garden operations.

[0040] An extension rod 18 is slidably connected inside the driven plate 11. The extension rod 18 is fixedly connected to the top of the support plate 12. A first slot adapted to the extension rod 18 is opened inside the driven plate 11.

[0041] Extension rods 18 are symmetrically distributed on both sides of electric cylinder 13. One end is fixed to the top of support plate 12 by a nut, and the other end is slidably embedded in the first slot of driven plate 11, restricting the movement trajectory of support plate 12 and ensuring that support plate 12 can only move vertically up and down. This avoids the support plate 12 tilting due to the force on one side of electric cylinder 13, thus improving support stability. The first slot is opened along the height direction of driven plate 11 and slides with extension rod 18, providing a sliding channel for extension rod 18, indirectly constraining the movement of support plate 12, and at the same time preventing extension rod 18 from being exposed and disturbed by garden debris.

[0042] The internal fixed connection of the fixed frame 3 is a second guide rail 19, the surface of the second guide rail 19 is slidably connected to a limiting block 20, one end of the limiting block 20 is fixedly connected to a limiting plate 21, and the limiting plate 21 is rotatably connected to one side of the driven plate 11.

[0043] The second guide rail 19 is fixed to the side of the fixed frame 3 near the driven plate 11. The slide groove is slidably engaged with the limiting block 20, providing an arc-shaped sliding track for the limiting block 20. The movement range of the limiting block 20 constrains the rotation angle of the driven plate 11. The limiting block 20 slides into the slide groove of the second guide rail 19. One end is rotatably connected to the limiting plate 21 through a hinge and slides along the second guide rail 19. The limiting plate 21 transmits the constraint force, limiting the maximum rotation angle of the driven plate 11. One end of the limiting plate 21 is rotatably connected to the limiting block 20 through a hinge, and the other end is rotatably connected to one side of the driven plate 11 through a hinge. The sliding constraint of the limiting block 20 is transformed into a rotation constraint on the driven plate 11, ensuring that the driven plate 11 is always in a state perpendicular to the ground, and avoiding the failure of the support due to the tilting of the driven plate 11 during garden slope operations.

[0044] Example 2

[0045] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the bottom of the support plate 12 is rotatably connected to the support base 22, and a pressure sensor is provided at the bottom of the support base 22.

[0046] The support base 22 is rotatably connected to the bottom of the support plate 12 by thrust. Its rotatable design adapts to slightly inclined ground, ensuring a tight fit between the bottom and the ground. A pressure sensor is fixedly embedded in a groove at the bottom of the support base 22, and its output is connected to the control system of the electric cylinder 13 (not shown in the attached diagram) via a wire to monitor the contact pressure between the support base 22 and the ground in real time.

[0047] 1) When not in contact with the ground, if the pressure value is ≤5N, the control system will control the electric cylinder 13 to continue extending;

[0048] 2) When the pressure value is ≥50N (the threshold can be set according to the hardness of the ground), the control system controls the electric cylinder 13 to stop extending, realizing the closed-loop control of "stop upon contact", avoiding excessive extension that may cause the support seat 22 to sink or become unsupported, thus improving the safety of garden operations.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting work platform for garden construction, comprising: Workbench; Its characteristic is that it further includes a connecting plate, which is fixedly connected to one side of the workbench; A fixed frame is disposed on one side of the workbench. A drive gear is rotatably connected inside the fixed frame. A movable rack meshes between the teeth of the drive gear. The movable rack is disposed at the bottom of the connecting plate. A worm is disposed at one end of the drive gear. A worm wheel meshes between the teeth of the worm. A lead screw is disposed inside the worm wheel. A ball joint is fixedly connected to one end of the lead screw. A drive plate is rotatably connected to the surface of the ball joint. The lead screw pushes the drive plate to rotate through the ball joint. A driven plate is rotatably connected to the bottom of the driving plate. A support plate is provided at the bottom of the driven plate. An electric cylinder is provided inside the driven plate and is fixedly connected to the top of the support plate. The electric cylinder pushes the support plate to move.

2. The lifting work platform for garden construction according to claim 1, characterized in that: One end of the drive gear is fixedly connected to a connecting rod, the connecting rod is fixedly connected to one end of the worm gear, and a slider is fixedly connected inside the worm gear, the slider being slidably connected to the surface of the lead screw.

3. The lifting work platform for garden construction according to claim 1, characterized in that: A synchronizing rod is fixedly connected to the top of the movable rack, and the synchronizing rod is fixedly connected to the bottom of the connecting plate.

4. The lifting work platform for garden construction according to claim 1, characterized in that: The other end of the lead screw is fixedly connected to a guide plate, and one end of the guide plate is slidably connected to a first guide rail, which is fixedly connected inside the fixed frame.

5. The lifting work platform for garden construction according to claim 1, characterized in that: An extension rod is slidably connected inside the driven plate. The extension rod is fixedly connected to the top of the support plate. A first slot adapted to the extension rod is opened inside the driven plate.

6. The lifting work platform for garden construction according to claim 1, characterized in that: The internal structure of the fixed frame is fixedly connected to a second guide rail, and a limiting block is slidably connected to the surface of the second guide rail. A limiting plate is fixedly connected to one end of the limiting block, and the limiting plate is rotatably connected to one side of the driven plate.

7. The lifting work platform for garden construction according to claim 1, characterized in that: The bottom of the support plate is rotatably connected to a support base, and a pressure sensor is installed at the bottom of the support base.

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