A lifting device for a wood processing workbench

Abstract

This utility model discloses a lifting device for a wood processing workbench, including a frame, a workbench, an adjusting mechanism, and a driving mechanism. The workbench can move along a first direction. The adjusting mechanism includes an adjusting rod, a first adjusting member, and a second adjusting member. The adjusting rod is installed on the frame along the first direction. The first adjusting member is sleeved on the adjusting rod and moves along the axial direction of the adjusting rod when rotated. The first adjusting member has a first end and a second end. The first end is in transmission cooperation with the second adjusting member, and the second end is connected to the workbench. When the second adjusting member is subjected to force, it rotates to guide the first end to rotate. When the first end rotates, the second end guides the workbench to move along the first direction. The driving mechanism drives the workbench to move along the first direction. This workbench can achieve secondary lifting through the coordinated operation of the driving mechanism and the adjusting mechanism, without relying on the stroke of a single driving mechanism, effectively increasing the lifting range of the workbench and meeting diverse processing needs.

Description

Technical Field

[0001] This utility model relates to the field of wood processing, and in particular to a lifting device for a wood processing workbench. Background Technology

[0002] In the wood processing industry, the workbench, as the core component for supporting wood and processing operations, directly affects processing efficiency, operational safety, and processing accuracy due to its height adjustment function. Most existing workbenches adopt a "single-lift" design, using a single drive mechanism such as a hydraulic cylinder or a single set of screws and nuts to achieve vertical height adjustment, adapting to different processing needs.

[0003] The single lifting stroke of existing worktables is determined by the maximum extension and retraction of the drive mechanism or the limit displacement of the transmission structure (e.g., fixed stroke of hydraulic cylinders, limited effective transmission length of screws). When processing requires "large-span height adjustment" (e.g., balancing low-altitude fine sanding of thin wood with high-altitude cutting of thick wood), the single lifting structure cannot cover a sufficient height range. Forcibly increasing the stroke would result in an excessively large drive mechanism (e.g., extra-long hydraulic cylinders) and decreased worktable stability (the longer the stroke, the more pronounced the swaying), which would affect processing safety and limit the scope of worktable use, making it difficult to meet diverse processing needs. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides a lifting device for a wood processing workbench. The lifting device effectively increases the lifting range of the workbench through the coordinated operation of the drive mechanism and the adjustment mechanism, so as to meet diverse processing needs.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A lifting device for a wood processing workbench includes:

[0007] frame;

[0008] A worktable, which is slidably connected to the frame, and the worktable is movable in a first direction;

[0009] An adjustment mechanism includes an adjustment rod, a first adjustment member, and a second adjustment member. The adjustment rod extends along a first direction. The first adjustment member is sleeved on the adjustment rod and threadedly engaged with it. The first adjustment member is used to move along the axial direction of the adjustment rod during rotation. The first adjustment member has a first end and a second end. The first end is in transmission engagement with the second adjustment member, and the second end is connected to the worktable.

[0010] The second adjusting member is rotatably connected to the worktable. The second adjusting member is used to rotate when force is applied to guide the first end to rotate. The second end is used to rotate along with the first end when the first end rotates to guide the worktable to move along the first direction.

[0011] A drive mechanism, which is connected to the adjusting rod.

[0012] Furthermore, the adjusting rod includes a screw, the first adjusting member includes a worm gear and a connecting shaft, the worm gear is connected to the connecting shaft, the worm gear is formed as the first end, the connecting shaft is formed as the second end, the worm gear and the connecting shaft are sequentially sleeved on the screw and threadedly engaged with the screw; the second adjusting member includes a worm, one end of the worm is meshed with the first end, the other end of the worm extends out of the worktable in a second direction and is rotatably connected to the worktable; a connecting arm is provided on the worktable, and the connecting arm is connected to the connecting shaft.

[0013] Furthermore, the workbench is provided with a through cavity and a through interface, the through interface is in communication with the through cavity, the screw passes through the through cavity, the worm extends into the through cavity through the through interface and meshes with the worm wheel; the connecting arm is connected to the cavity wall of the through cavity.

[0014] Furthermore, the workbench is provided with a detachable mounting base, the mounting base covers the through-port, the mounting base is provided with a through-groove section, the through-groove section extends along the second direction, and the worm gear passes through the through-groove section; the connecting arm is provided on the side of the mounting base facing the through-cavity.

[0015] Furthermore, the connecting arm is provided with a through hole, and the connecting shaft is used to pass through the through hole after the worm gear is connected to the screw;

[0016] The adjusting mechanism includes a bearing seat and a limiting nut. The bearing seat is used to be sleeved on the connecting shaft after the connecting arm is connected to the connecting shaft, and abuts against the bottom end of the connecting arm. The limiting nut is sleeved on the connecting shaft and abuts against the bottom of the bearing seat to lock the bearing seat.

[0017] Furthermore, the worm gear is provided with a handle, which is used to drive the worm gear to rotate when force is applied.

[0018] Furthermore, the driving mechanism includes a driving cylinder and a piston rod, the piston rod being arranged along a first direction and connected to the screw, and the driving cylinder being used to drive the piston rod to move along the first direction.

[0019] Furthermore, the drive cylinder is provided with at least two guide rods and a mounting plate, with each pair of guide rods symmetrically distributed on both sides of the drive cylinder, and the guide rods extending along a first direction; one end of the guide rod is fixedly connected to the drive cylinder, and the other end of the guide rod is movably connected to the mounting plate; the mounting plate is sleeved on the outer periphery of the piston rod and connected to the end of the screw.

[0020] Furthermore, the frame is provided with a slide rail that extends along the first direction, and the worktable is provided with a slider that slides in cooperation with the slide rail.

[0021] Furthermore, the frame is provided with two slide rails, which are spaced apart, and the worktable is provided with at least two sliders, each pair of sliders being symmetrically distributed on the worktable and slidingly engaging with the two slide rails respectively.

[0022] In summary, the lifting device for a wood processing workbench of this utility model has the following technical effects: It slidably connects the workbench to the frame, allowing the workbench to slide along a first direction (the height direction of the frame), providing a basic guide for the stable lifting and lowering of the workbench. When the workbench height needs to be adjusted, the adjusting rod is first driven directly along the first direction by the drive mechanism. Since the first adjusting component is sleeved on the adjusting rod and connected to the workbench, it can drive the workbench to slide along the first direction, thereby achieving a large-range basic lifting and lowering of the workbench.

[0023] After the drive mechanism completes the basic lifting and lowering, if further fine-tuning of the worktable height is required, an external force can be applied to the second adjusting component to drive it to rotate, thereby guiding the first adjusting component to rotate. This allows the first adjusting component to move along the axis of the adjusting rod (i.e., the first direction), causing the worktable to lift and lower within a small range along the first direction. In this way, through the coordinated operation of the drive mechanism and the adjusting mechanism, the worktable can achieve secondary lifting and lowering without relying on the stroke of a single drive mechanism. This reduces problems such as excessive drive mechanism size and decreased stability caused by forcibly expanding the single lifting and lowering range, while also improving the lifting range and adjustment accuracy of the worktable, making it better suited to the processing needs of different types of wood. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of this utility model from another perspective;

[0028] Figure 4 This is a schematic diagram of the adjustment mechanism in this utility model;

[0029] Figure 5 This is a cross-sectional view of the adjusting mechanism in this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the first adjusting member in this utility model;

[0031] Figure 7 This is a schematic diagram of the mounting base in this utility model;

[0032] Figure 8 This is a schematic diagram of the assembly of the workbench and the frame in this utility model;

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 10. Frame; 11. Slide rail; 20. Worktable; 21. Through-hole; 22. Through-port; 23. Connecting arm; 231. Through-hole; 24. Mounting base; 241. Through-slot section; 25. Slider; 30. Adjustment mechanism; 31. Adjustment rod; 311. Screw; 32. First adjusting component; 321. Worm gear; 322. Connecting shaft; 33. Second adjusting component; 331. Worm; 34. Bearing seat; 35. Limit nut; 40. Drive mechanism; 41. Drive cylinder; 42. Piston rod; 50. Grip; 60. Guide rod; 70. Mounting plate. Detailed Implementation

[0035] 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.

[0036] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0038] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0039] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0040] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0041] See Figures 1 to 8 This utility model discloses a lifting device for a wood processing workbench, including a frame 10, a workbench 20, an adjustment mechanism 30, and a drive mechanism 40, wherein the workbench 20 is slidably connected to the frame 10 so that the workbench 20 can move along a first direction.

[0042] The adjustment mechanism 30 specifically includes an adjustment rod 31, a first adjustment member 32, and a second adjustment member 33. The adjustment rod 31 is installed on the worktable 20 along a first direction and is connected to the drive mechanism 40. The first adjustment member 32 is sleeved on the adjustment rod 31 and threadedly engaged with the adjustment rod 31. When rotating, the first adjustment member 32 moves along the axial direction of the adjustment rod 31. The first adjustment member 32 has a first end and a second end. The first end is in transmission engagement with the second adjustment member 33, and the second end is connected to the worktable 20. The second adjustment member 33 is rotatably connected to the worktable 20. The second adjustment member 33 is used to rotate when subjected to force to guide the first end to rotate, and the second end is used to rotate along with the first end to guide the worktable 20 to move along the first direction.

[0043] Based on the above structure, taking the height direction of the frame 10 as an example, during assembly, the sliding connection design between the worktable 20 and the frame 10 (such as the cooperation between the slide rail 11 and the slider 25) provides a clear movement trajectory for the lifting of the worktable 20 (i.e., along the first direction), effectively reducing lateral sway and improving lifting stability. At the same time, the first adjusting component 32 is set along the first direction and is consistent with the movement direction of the worktable 20, making the force transmission direction of the adjusting mechanism 30 more in line with the movement requirements of the worktable 20, further enhancing lifting stability.

[0044] When the height of the worktable 20 needs to be adjusted, the power of the drive mechanism 40 (such as a hydraulic cylinder piston rod or an electric lead screw) directly acts on the adjusting rod 31, pushing the adjusting rod 31 to move in the first direction. At this time, since the first adjusting member 32 is threadedly engaged with the adjusting rod 31, and the second end of the first adjusting member 32 is directly connected to the worktable 20, and the second adjusting member 33 is rotatably connected to the worktable 20, the movement of the adjusting rod 31 is transmitted to the first adjusting member 32 through the threaded engagement. The fixed connection between the first adjusting member 32 and the worktable 20 directly transmits the movement to the worktable 20. At the same time, the second adjusting member 33 moves synchronously with the worktable 20, ultimately driving the worktable 20, the first adjusting member 32, and the second adjusting member 33 to form a whole and move synchronously along the height direction, completing the initial lifting and lowering.

[0045] It should be noted that since the first adjusting member 32 and the adjusting rod 31 are connected by threads, and the thread design itself has axial self-locking properties, even if an impact is received, when the impact force is transmitted axially along the adjusting rod 31, it will be dispersed to the adjusting rod 31 and the first adjusting member 32 through the large-area contact of the thread teeth, thereby reducing the risk of connection failure due to excessive force at a single point.

[0046] Meanwhile, due to the fixed connection between the second end of the first adjusting member 32 and the worktable 20, and the rotatable connection between the second adjusting member 33 and the worktable 20, the worktable 20, the first adjusting member 32, and the second adjusting member 33 are bound together as a rigid whole. When the drive mechanism 40 drives the adjusting rod 31 to move and generate an impact, the impact force is transmitted sequentially through the adjusting rod 31 and the thread to the first adjusting member 32, and is ultimately borne by the aforementioned rigid whole. The impact force is distributed throughout the entire system, rather than concentrated at a single connection point, thereby reducing the risk of failure of the connection between the first adjusting member 32, the second adjusting member 33, and related components due to impact.

[0047] More specifically, if the worktable 20 requires further fine-tuning, the operator applies external force to the second adjusting member 33 to rotate it. Since the second adjusting member 33 and the first adjusting member 32 are in a transmission engagement (such as gear meshing), the rotation of the second adjusting member 33 is converted into torque on the first adjusting member 32, forcing the first adjusting member 32 to rotate around the axis of the adjusting rod 31. The first adjusting member 32 and the adjusting rod 31 are in a threaded engagement, and when rotated, they will generate displacement along the axial direction (first direction) of the adjusting rod 31, converting the rotational motion of the first adjusting member 32 into linear motion along the first direction. At this time, since the second end of the first adjusting member 32 is connected to the worktable 20, the axial displacement of the first adjusting member 32 directly pulls or pushes the worktable 20 to slide along the first direction, achieving height fine-tuning.

[0048] In addition, the fine-tuning of the workbench 20 is achieved by manually driving the second adjustment component 33, without relying on external power. The operator can adjust it in real time according to the processing feel, and the adjustment process can be paused at any time to accurately control the amount of fine-tuning to adapt to various needs in wood processing.

[0049] In this way, through the coordinated operation of the drive mechanism 40 and the adjustment mechanism 30, the worktable 20 can achieve two lifting and lowering without relying on the stroke of a single drive mechanism 40. This can reduce problems such as the drive mechanism 40 becoming too large and its stability decreasing due to forcibly expanding the range of a single lifting and lowering, and can also improve the lifting range and adjustment accuracy of the worktable 20, so that it can better adapt to the processing needs of different wood materials.

[0050] It should be noted that in this embodiment, the adjusting rod 31 is a screw 311 or lead screw with external threads, the first adjusting component 32 is a worm gear 321, the toothed end of the worm gear 321 is the first end, and the short shaft integrally machined below is the second end (for connecting the worktable 20). A threaded hole matching the screw 311 is machined in the center of the worm gear 321, and it is sleeved on the adjusting rod 31 through the central threaded hole; while the second adjusting component 33 is a worm 331 that meshes with the worm gear 321. The worm 331 is horizontally fixed to the worktable 20 through the bearing seat 34 and meshes with the first end (tooth surface) of the worm gear 321 to form a stable transmission chain.

[0051] When fine-tuning is required, the operator rotates the worm 331 (second adjusting member 33). The rotational force of the worm 331 is transmitted to the first end (tooth surface) of the worm wheel 321 through tooth surface meshing, forcing the worm wheel 321 to rotate slowly around the axis of the adjusting rod 31. Since the central threaded hole of the worm wheel 321 is engaged with the external thread of the adjusting rod 31, the rotational motion of the worm wheel 321 is converted into linear motion along the axial direction (first direction) of the adjusting rod 31. This motion is directly transmitted to the worktable 20 through the short shaft (second end) below the worm wheel 321, driving the worktable 20 to move smoothly along the sliding track (first direction) of the frame 10, thus achieving height fine-tuning.

[0052] Of course, the first adjusting component 32 can also adopt a welded combination structure of "bevel gear and threaded sleeve", where the bevel gear is the first end (for power input) and the threaded sleeve with an internal threaded section is the second end (for power output and connection). During assembly, the threaded sleeve engages with the threaded section of the adjusting rod 31 (lead screw or bolt 311), and the threaded sleeve is connected to the worktable 20 through flanges or bolts. The second adjusting component 33 is a horizontal shaft with bevel teeth. One end with bevel teeth meshes with the bevel gear (first end) of the first adjusting component 32, and the other end is rotatably connected to the worktable 20 through a bearing seat 34.

[0053] When fine-tuning is required, the operator rotates the exposed end of the second adjusting member 33 (a handwheel can be added to improve ease of operation). The rotation of the horizontal axis is transmitted to the bevel gear (first end) of the first adjusting member 32 through bevel gear engagement, forcing the first adjusting member 32 to rotate around the axis of the adjusting rod 31. At this time, the threaded sleeve (second end) generates threaded transmission with the adjusting rod 31 due to rotation, and generates linear displacement along the axial direction (first direction) of the adjusting rod 31. This displacement is directly transmitted to the worktable 20 through the rigid connection between the threaded sleeve and the worktable 20, driving the worktable 20 to move smoothly along the sliding track of the frame 10.

[0054] Preferably, in this embodiment, the adjusting rod 31 includes a screw 311, the first adjusting member 32 includes a worm gear 321 and a connecting shaft 322, the worm gear 321 is connected to the connecting shaft 322, the worm gear 321 is formed as a first end, the connecting shaft 322 is formed as a second end, the worm gear 321 and the connecting shaft 322 are sequentially sleeved on the screw 311 and threadedly engaged with the screw 311; the second adjusting member 33 includes a worm 331, one end of the worm 331 is meshed with the first end, and the other end of the worm 331 extends out of the worktable 20 in a second direction and is rotatably connected to the worktable 20; the worktable 20 is provided with a connecting arm 23, which is connected to the connecting shaft 322.

[0055] Specifically, during assembly, the screw 311 is connected to the power output end of the drive mechanism 40 along the first direction. The worm gear 321 is welded to the connecting shaft 322. Threaded holes matching the screw 311 are machined at the center of both the worm gear 321 and the connecting shaft 322, and then sequentially fitted onto the screw 311. The worm gear 321 forms the first end for transmission, and the connecting shaft 322 forms the second end and connects to the connecting arm 23 on the worktable 20. The worm 331 is horizontally mounted on the worktable 20 via a bearing seat 34. One toothed end meshes with the worm gear 321, and the other end extends out of the worktable 20 along the second direction (such as the horizontal direction of the worktable 20) to allow the user to apply external force to the worm 331 outside the worktable 20.

[0056] When the height of the worktable 20 needs to be adjusted, the operator rotates the worm gear 331. The rotation of the worm gear 331 drives the worm wheel 321 to rotate around the axis of the screw 311 (first direction) through tooth meshing. Since the worm wheel 321 and the connecting shaft 322 are rigidly connected and both are threaded into the screw 311, the rotation of the worm wheel 321 will synchronously drive the connecting shaft 322 to produce a linear displacement along the axial direction of the screw 311 (first direction). This displacement is transmitted to the connecting arm 23 through the connecting shaft 322, and the connecting arm 23 then transmits the force to the worktable 20, ultimately driving the worktable 20 to rise and fall smoothly along the sliding track (first direction) of the frame 10.

[0057] It should be noted that the connecting arm 23 can be welded onto the worktable 20 or it can be integrally machined with the worktable 20.

[0058] Furthermore, the workbench 20 is provided with a through cavity 21 and a through interface 22. The through interface 22 is connected to the through cavity 21. The screw 311 passes through the through cavity 21. The worm 331 extends into the through cavity 21 through the through interface 22 and meshes with the worm wheel 321. The connecting arm 23 is connected to the cavity wall of the through cavity 21.

[0059] Specifically, a through cavity 21 is opened inside the workbench 20 along the first direction, and a through interface 22 is opened on the side to communicate with the through cavity 21. The screw 311 is inserted into the through cavity 21, the first adjusting member 32 is sleeved on the screw 311, and the worm 331 extends horizontally into the through cavity 21 along the second direction through the through interface 22 and meshes with the worm wheel 321 in the through cavity 21. This provides protection for the adjusting mechanism 30 through the through cavity 21, reducing the problem of the adjusting mechanism 30 getting stuck due to external dust falling in.

[0060] In addition, when the workbench 20 is provided with a through cavity 21, one end of the connecting arm 23 is welded or bolted to the cavity wall of the through cavity 21 (near the connecting shaft 322), and the other end of the connecting arm 23 is rigidly connected to the connecting shaft 322 (second end), so that the cavity wall of the through cavity 21, the connecting arm 23, and the connecting shaft 322 form a linkage whole.

[0061] Furthermore, the workbench 20 is provided with a detachable mounting base 24, which covers the through-port 22. The mounting base 24 is provided with a through-slot section 241, which extends along the second direction. The worm gear 331 passes through the through-slot section 241. The connecting arm 23 is located on the side of the mounting base 24 facing the through-cavity 21.

[0062] Specifically, by covering the mounting base 24 onto the through-hole 22, the through-hole cavity 21 can be further isolated from the external environment, reducing the risk of wood chips or dust generated during wood processing entering the through-hole cavity 21 and causing the screw 311 or worm gear 321 to jam.

[0063] More specifically, by providing a through-slot section 241 on the mounting base 24 to pass through the worm gear 331, the worm gear 331 is wrapped by the groove wall of the through-slot section 241, reducing the risk of impurities contaminating the exposed part of the worm gear 331 and reducing the probability of transmission jamming or wear caused by contamination of the worm gear 331.

[0064] Meanwhile, the mounting base 24 provides a rigid support foundation for the connecting arm 23. The integrated design of the connecting arm 23 and the mounting base 24 reduces the risk of deformation during transmission, making the power transmission between the worm gear 321 and the worktable 20 more stable. In addition, since the mounting base 24 and the worktable 20 are detachably connected, when the worm 331, connecting arm 23, or worm gear 321 needs maintenance, the mounting base 24 can be directly disassembled to remove the relevant components as a whole, without disassembling the screw 311 or the main structure of the worktable 20, which facilitates maintenance.

[0065] Furthermore, the connecting arm 23 is provided with a through hole 231, and the connecting shaft 322 is used to pass through the through hole 231 after the worm gear 321 is connected to the screw 311; the adjusting mechanism 30 includes a bearing seat 34 and a limiting nut 35. After the connecting arm 23 is connected to the connecting shaft 322, the bearing seat 34 is sleeved on the connecting shaft 322 and abuts against the bottom end of the connecting arm 23. The limiting nut 35 is sleeved on the connecting shaft 322 and abuts against the bottom of the bearing seat 34 to lock the bearing seat 34.

[0066] Specifically, during assembly, after the worm gear 321 and screw 311 are threaded together, the connecting shaft 322 can be directly inserted into the through hole 231. The clearance fit between the hole and the shaft ensures the coaxiality of the connecting shaft 322 and the connecting arm 23, providing a foundation for the smoothness of subsequent transmission. After the connecting shaft 322 is inserted into the through hole 231, the bearing housing 34 is fitted onto the connecting shaft 322 and abuts against the bottom of the connecting arm 23. Its internal bearing can separate the rotational motion of the connecting shaft 322 from the linear motion of the connecting arm 23, reducing frictional wear on the connecting arm 23 caused by the rotation of the connecting shaft 322. After the bearing housing 34 is connected to the connecting shaft 322, the limiting nut 35 engages with the connecting shaft 322 through threads. After tightening, it abuts against the bottom of the bearing housing 34, locking the bearing housing 34 at the bottom of the connecting arm 23. This reduces the risk of axial displacement of the bearing housing 34 due to vibration during adjustment, making the entire transmission process more stable.

[0067] It should be noted that the bearing housing 34 in this embodiment can be a plane bearing.

[0068] More specifically, a handle is provided on the worm 331. The handle can be located at the end of the worm 331 that extends out of the worktable 20, so that the user can easily apply external force to the worm 331.

[0069] Preferably, the grip can be an existing grip wheel or grip bar.

[0070] Furthermore, the drive mechanism 40 includes a drive cylinder 41 and a piston rod 42. The piston rod 42 is arranged along a first direction and connected to the screw 311. The drive cylinder 41 is used to drive the piston rod 42 to move along the first direction.

[0071] Specifically, the piston rod 42 is arranged along the first direction, with one end connected to the output end of the drive cylinder 41 (such as a hydraulic cylinder or pneumatic cylinder), and the other end rigidly connected to the screw 311 via a coupling or flange. When a large-span height adjustment is required, the drive cylinder 41 is activated, and the piston rod 42 is pushed to extend and retract along the first direction by hydraulic or pneumatic driving force. The linear motion of the piston rod 42 directly drives the screw 311 to move synchronously. At this time, the motion of the screw 311 is transmitted to the worm gear 321 and the connecting shaft 322 through the threaded connection, and then transmitted to the worktable 20 through the connecting arm 23, realizing the rapid initial lifting and lowering of the worktable 20.

[0072] Furthermore, the drive cylinder 41 is provided with at least two guide rods 60 and a mounting plate 70. Each pair of guide rods 60 is symmetrically distributed on both sides of the drive cylinder 41, and the guide rods 60 extend along the first direction. One end of the guide rod 60 is fixedly connected to the drive cylinder 41, and the other end of the guide rod 60 is movably connected to the mounting plate 70. The mounting plate 70 is sleeved on the outer periphery of the piston rod 42 and connected to the end of the screw 311.

[0073] Specifically, at least two guide rods 60 are symmetrically distributed on both sides of the drive cylinder 41, extending along the first direction. One end is fixedly connected to the end face of the drive cylinder 41 (e.g., by bolting), and the other end passes through the guide hole of the mounting plate 70 to form a movable connection, so as to provide axial guidance for the mounting plate 70 through the guide rods 60. During assembly, a through hole is opened in the center of the mounting plate 70, and after being sleeved on the outer periphery of the piston rod 42, it is rigidly connected to the end of the screw 311 by bolts. When the drive cylinder 41 drives the piston rod 42 to extend and retract, the mounting plate 70 moves synchronously with the piston rod 42. At this time, the guide rods 60 on both sides pass through the guide hole of the mounting plate 70, constraining the mounting plate 70 to only translate along the first direction, reducing the probability of radial wobble of the piston rod 42 due to uneven load.

[0074] Furthermore, the mounting plate 70, acting as a connection intermediary between the piston rod 42 and the screw 311, eliminates the coaxiality error during their connection (such as slight misalignment of the piston rod 42 and screw 311 during assembly) through the constraint of the guide rod 60, allowing the screw 311 to move only along the axial direction (first direction), thereby reducing the risk of the radial wobble of the piston rod 42 affecting the threaded fit between the worm gear 321 and the screw 311.

[0075] It should be noted that the guide rods 60 in this embodiment can be set to two, four, six or more, with each pair of guide rods 60 symmetrically distributed on both sides of the drive cylinder 41. A stable balance constraint system is constructed through multiple symmetrically distributed guide rods 60, which effectively counteracts the radial yaw force generated during the extension and retraction of the piston rod 42, so that the piston rod 42 maintains axial stability when moving in the first direction, reducing transmission clearance or component wear caused by yaw, and providing a stable power transmission foundation for the subsequent screw 311 to drive the worktable 20 to rise and fall.

[0076] Furthermore, the frame 10 is provided with a slide rail 11, which extends along the first direction. The worktable 20 is provided with a slider 25, which slides in cooperation with the slide rail 11. The sliding cooperation between the slide rails 11 provides a clear guide trajectory for the lifting and lowering movement of the worktable 20 in the first direction. When the worktable 20 is initially lifted or lowered by the drive mechanism 40, or when the height is finely adjusted by the fine-tuning mechanism, the slider 25 will slide synchronously along the extension direction of the slide rail 11. The slide rail 11 forms a lateral constraint through the contact surface with the slider 25, effectively limiting the horizontal offset of the worktable 20.

[0077] More specifically, the frame 10 is equipped with two slide rails 11 spaced apart, and the worktable 20 is equipped with at least two sliders 25, with each pair of sliders 25 symmetrically distributed on the worktable 20 and slidingly engaging with the two slide rails 11 respectively. The two spaced slide rails 11 form a "double-support" structure, and the symmetrical distribution of the sliders 25 on both sides of the worktable 20 evenly distributes the weight of the worktable 20 and the processing load onto the two slide rails 11. For example, during wood processing, the worktable 20 is subjected to lateral forces generated by sawing. The symmetrically distributed sliders 25 can transmit these forces to the frame 10 through the two slide rails 11, reducing the problem of tilting of the worktable 20 due to unilateral force. Even if the load is eccentric (such as wood stacked to one side), the spaced arrangement of the two slide rails 11 can offset the eccentric load through torque balance, reducing localized wear on the slide rails 11 and sliders 25.

[0078] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A lifting device for a timber processing bench, characterised in that, include: frame; A worktable, which is slidably connected to the frame, and the worktable is movable in a first direction; An adjustment mechanism includes an adjustment rod, a first adjustment member, and a second adjustment member. The adjustment rod extends along a first direction. The first adjustment member is sleeved on the adjustment rod and threadedly engaged with it. The first adjustment member is used to move along the axial direction of the adjustment rod during rotation. The first adjustment member has a first end and a second end. The first end is in transmission engagement with the second adjustment member, and the second end is connected to the worktable. The second adjusting member is rotatably connected to the worktable. The second adjusting member is used to rotate when force is applied to guide the first end to rotate. The second end is used to rotate along with the first end when the first end rotates to guide the worktable to move along the first direction. A drive mechanism, which is connected to the adjusting rod.

2. A lifting device for a timber processing bench as claimed in claim 1 wherein, The adjusting rod includes a screw. The first adjusting component includes a worm gear and a connecting shaft. The worm gear is connected to the connecting shaft. The worm gear is formed as the first end, and the connecting shaft is formed as the second end. The worm gear and the connecting shaft are sequentially sleeved on the screw and threadedly engaged with the screw. The second adjusting component includes a worm. One end of the worm is engaged with the first end, and the other end of the worm extends out of the worktable along a second direction and is rotatably connected to the worktable. A connecting arm is provided on the worktable, and the connecting arm is connected to the connecting shaft.

3. The lifting device for the wood processing workbench as described in claim 2, characterized in that, The workbench is provided with a through cavity and a through port. The through port communicates with the through cavity. The screw passes through the through cavity. The worm extends into the through cavity through the through port and meshes with the worm wheel. The connecting arm is connected to the cavity wall of the through cavity.

4. The lifting device for the wood processing workbench as described in claim 3, characterized in that, The workbench is provided with a detachable mounting base, which covers the through-port and has a through-groove section that extends along the second direction. The worm gear passes through the through-groove section. The connecting arm is located on the side of the mounting base facing the through-cavity.

5. The lifting device for the wood processing workbench as described in claim 4, characterized in that, The connecting arm is provided with a through hole, and the connecting shaft is used to pass through the through hole after the worm gear is connected to the screw; The adjusting mechanism includes a bearing seat and a limiting nut. The bearing seat is used to be sleeved on the connecting shaft after the connecting arm is connected to the connecting shaft, and abuts against the bottom end of the connecting arm. The limiting nut is sleeved on the connecting shaft and abuts against the bottom of the bearing seat to lock the bearing seat.

6. The lifting device for the wood processing workbench as described in claim 2, characterized in that, The worm gear is equipped with a handle, which is used to drive the worm gear to rotate when force is applied.

7. The lifting device for the wood processing workbench as described in any one of claims 2-6, characterized in that, The driving mechanism includes a driving cylinder and a piston rod. The piston rod is arranged along a first direction and connected to the screw. The driving cylinder is used to drive the piston rod to move along the first direction.

8. The lifting device for the wood processing workbench as described in claim 7, characterized in that, The drive cylinder is provided with at least two guide rods and a mounting plate. Each pair of guide rods is symmetrically distributed on both sides of the drive cylinder. The guide rods extend along a first direction. One end of the guide rod is fixedly connected to the drive cylinder, and the other end of the guide rod is movably connected to the mounting plate. The mounting plate is sleeved on the outer periphery of the piston rod and connected to the end of the screw.

9. The lifting device for a wood processing workbench as described in any one of claims 1-6, characterized in that, The frame is provided with a slide rail that extends along the first direction, and the worktable is provided with a slider that slides in cooperation with the slide rail.

10. The lifting device for the wood processing workbench as described in claim 9, characterized in that, The frame is provided with two slide rails, which are spaced apart. The worktable is provided with at least two sliders, which are symmetrically distributed on the worktable and slide in cooperation with the two slide rails respectively.

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