Improved structure of planer lifting mechanism

Abstract

The utility model provides a kind of wood planer lifting improvement structure, include: a pedestal, multiple corners are provided with ball screw;A upper seat, its bottom surface and the workbench form a working space, and is equipped with multiple assembly holes;A motor and a driving element are located in the upper seat, the motor is used to drive a cutter shaft rotation;Several lifting units are respectively assembled in each assembly hole, the lifting unit is composed of a ball nut, two thrust bearings, a driven part and a driven wheel, wherein the ball nut and ball screw form guide screw mechanism, and are engaged with the driving element by the driven part to drive the upper seat to realize multi-axis synchronous lifting;By this means, the gap error caused by screw thread can be effectively eliminated, the machining precision and stability are improved, and high smoothness and durability are provided.

Description

Technical Field

[0001] This utility model relates to an improved lifting structure for a wood planer, and more particularly to an improved lifting mechanism structure for a wood planer. It uses a guide screw mechanism composed of a ball screw and a ball nut, combined with a drive component, to achieve synchronous transmission for lifting, thereby improving precision and synchronization, and thus improving the quality of planing. It belongs to the technical field of processing precision adjustment for woodworking machinery equipment. Background Technology

[0002] Today, in the woodworking industry, planers have become a common tool for processing wood to achieve a smooth surface and consistent thickness. In order to achieve precise control of the height between the cutter shaft and the workpiece, an upper structure is often used in conjunction with a lifting mechanism, which allows the upper structure to be raised and lowered linearly relative to the base to adjust the planing depth and processing thickness.

[0003] Please see Figure 1 As shown, it is a three-dimensional schematic diagram of the lifting structure of an existing wood planer. The structure includes a base 10A with vertically upward screws 11A at multiple corner positions. An upper seat 20A has internal threaded portions corresponding to each screw 11A, which can be adjusted for height by threaded engagement. Each screw 11A has a sprocket 21A at its top, and a worm gear assembly is located below the sprocket 21A. The sprockets 21A are interconnected by chains, and the overall mechanism is raised or lowered by rotating a handwheel 22A with a worm gear at one end, achieving linear displacement of the upper seat 20A. In addition, the existing structure also includes a motor 30A and a belt 31A to drive the cutter shaft for planing operations. However, the existing structure mainly relies on "threaded engagement" for height adjustment. In actual use, the machining gap between the threads can easily cause the upper seat 20A to wobble slightly during positioning, which affects the stability of the distance between the cutter shaft and the workpiece. This results in errors such as "uneven front and rear ends" or "thick in the middle and thin at both ends" on the surface of the workpiece, which cannot meet the requirements of high-precision machining.

[0004] To improve this defect, such as Figure 2As shown, there is another existing structure in the industry, which has a worktable 11B on the base 10B and screws 13B at multiple corners. The screws 13B are screwed into multiple lifting units 21B on the upper seat 20B. Each lifting unit 21B is composed of a first guide screw 22B and a second guide screw 26B with an elastic element 25B sandwiched between them. The elastic element 25B pre-compresses the screw threads to eliminate gaps, and the handwheel 27B drives the lifting and lowering through the driven part 23B. In addition, the thrust bearing 24B is located above the driven part 23B and is also equipped with a motor 30B and a tool shaft drive mechanism for machining operations. However, although the existing mechanism has been improved by adding an elastic element 25B to suppress the thread backlash in a spreading manner, which helps to reduce some errors, the structure still has the following technical bottlenecks: First, after the elastic element 25B applies force to the first guide screw 22B and the second guide screw 26B, it will cause the overall thread rotation resistance to increase, making the lifting operation less smooth; Second, the elastic element 25B is prone to fatigue and life reduction under long-term use. Once the elastic force decreases, the mechanism backlash will reappear, which will reduce the machining accuracy again. Utility Model Content

[0005] This utility model presents an improved lifting structure for wood planers, addressing shortcomings of traditional wood planer lifting structures such as thread clearance, uneven lifting, and machining errors. The aim is to provide an improved lifting structure for wood planers that utilizes a guide screw lifting unit composed of a ball screw and a ball nut, coupled with a helical gear or worm gear drive and a synchronous belt or chain transmission mechanism. This results in higher precision, stability, and durability of the overall lifting motion, effectively eliminating machining errors caused by thread clearance in traditional mechanisms.

[0006] This utility model mainly includes a base with a worktable on its surface, and a ball screw vertically arranged at multiple corner positions of the base; an upper seat, the bottom surface of which forms a working space opposite to the worktable, the upper seat having an assembly hole corresponding to each of the ball screws, and a combination part on one end face of the upper seat corresponding to one of the assembly holes, the combination part being able to assemble a driving component, the driving component having a driving part inserted into the combination part; a motor, which is located at a predetermined position on the upper seat, for driving a tool belt, the tool belt in turn driving a tool shaft to rotate; and several lifting units, which are respectively assembled in each of the assembly holes, the lifting unit including: a ball nut, a... The system comprises a lifting bushing, two thrust bearings, a driven member, and a driven wheel. The ball nuts are screwed to their corresponding ball screws. The lifting bushing is fixed to the upper end of the ball nuts. The ball screw is sleeved inside the lifting bushing. The thrust bearing, the driven member, another thrust bearing, and the driven wheel are sequentially arranged from bottom to top outside the lifting bushing. The driven wheel protrudes from the upper end of the assembly hole. The driven member can engage with the driving part. Each driven wheel is connected by a drive belt. The driving member drives one of the driven members, thereby causing the driven wheels of each lifting unit to rotate synchronously, driving each ball nut to rotate, causing the upper seat to perform linear lifting and lowering motion relative to the base. The ball nuts and ball screws form a high-precision guide screw structure, with several rotating balls introduced internally for cyclic rolling lifting and lowering. This not only completely eliminates gap problems but also maintains smoothness and precision during long-term operation.

[0007] Subsequently, the driven component meshes with the driving part of a driving component and is connected to the drive belt through the driven wheel, enabling the drive of a single lifting unit to be synchronously transmitted to other lifting units, achieving multi-axis synchronous lifting control, ensuring that the upper seat and the worktable remain parallel, and further improving machining quality. The driving component can adopt a helical gear or worm gear form to cooperate with the helical gear or worm gear design of the driven component, forming a highly efficient and stable transmission structure.

[0008] Furthermore, compared to existing technologies, this invention, when the workpiece to be ground is placed in the workspace, utilizes the ball nuts and ball screws of several lifting units to guide the rotation of the rotating balls, avoiding the mechanical clearance and positioning looseness caused by traditional threaded connections, thus significantly eliminating clearance errors. Moreover, this invention, through a synchronous lifting drive mechanism, ensures the upper seat remains horizontal, preventing unevenness caused by thickness in the middle and thinness at both ends during planing, thereby improving machining accuracy and surface quality. This invention employs a ball nut and ball screw guiding mechanism to reduce friction, improving the resistance and fatigue problems caused by elastic elements pressing on the threads, ensuring long-term stable operation, and achieving practical advancements in smooth lifting, easy rotation, and high durability.

[0009] In some embodiments, a spiral rib is formed on the surface of the ball screw, and a spiral ball groove is formed between the pitches formed by the spiral rib; the inner peripheral wall of the ball nut is provided with an inner ball groove corresponding to the spiral ball groove, and a plurality of spiral balls are provided between the inner ball groove and the spiral ball groove, and an end plug is provided at both ends of the ball nut, and a chamber is provided on one side to accommodate a plurality of circulating balls.

[0010] In some embodiments, the lifting shaft sleeve has a fixed ring edge at one end corresponding to the ball nut, the fixed ring edge has a plurality of screw holes, the ball nut has a wing at the fixed ring edge, the wing has a plurality of combination holes corresponding to the screw holes, and a plurality of screw components are screwed and fixed to the screw holes through the combination holes respectively.

[0011] In some embodiments, the driven wheel is a pulley or a sprocket, and the drive belt is a belt or a chain.

[0012] In some embodiments, the driving part of the drive member is in the form of a helical gear or a worm gear, and the driven part of the lifting unit is a helical gear or a worm wheel.

[0013] In some embodiments, a nut is provided at the top of the driven wheel of the lifting unit.

[0014] In some embodiments, a conveyor wheel is provided on each side of the cutter shaft of the upper seat.

[0015] Therefore, the improved lifting structure for wood planers provided by this utility model can effectively overcome the technical bottlenecks of the prior art, and is innovative and practical, thus providing industrial value. Attached Figure Description

[0016] Figure 1 : A perspective view of the existing technology.

[0017] Figure 2 : A partial cross-sectional view of another prior art.

[0018] Figure 3 : This is a perspective view of the present invention.

[0019] Figure 4 : This is an exploded perspective view of the present invention.

[0020] Figure 5 : This is a partial sectional view of the lifting unit of this utility model.

[0021] Figure 6 :for Figure 5 Enlarged sectional view of the lifting unit at the ball nut and ball screw.

[0022] Explanation of markings in the diagram: Existing technology: 10A: Base; 11A: Screw; 20A: Upper seat; 21A: Sprocket; 22A: Handwheel; 30A: Motor; 31A: Belt; 10B: Base; 11B: Worktable; 12B: Workspace; 13B: Screw; 20B: Upper seat; 21B: Lifting unit; 22B: First guide screw; 23B: Driven part; 24B: Thrust bearing; 25B: Elastic element; 26B: Second guide screw; 27B: Handwheel; 30B: Motor; S: Workpiece to be ground; This utility model includes: 10: base; 11: worktable; 12: working space; 13: ball screw; 131: spiral rib; 132: spiral ball groove; 20: upper seat; 201: combined space; 21: motor; 22: combined part; 23: driving component; 24: driving part; 25: tool belt; 26: driving belt; 27: assembly hole; 28: tool shaft; 29: conveyor wheel; 30: lifting unit; 31: thrust bearing; 32: driven component; 33: driven wheel; 34: nut; 40: ball nut; 41: side seat; 42: chamber; 43: circulating ball; 44: end plug; 45: wing; 46: combined hole; 47: screw assembly; 48: inner ball groove; 50: lifting bushing; 51: fixing ring edge; 52: screw assembly hole; 60: workpiece to be ground; B: spiral ball. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 3 to 6 The present invention will be further described with reference to specific embodiments to enable those skilled in the art to better understand and implement the present invention, but the embodiments are not intended to limit the present invention. The present invention includes: a base 10, on the upper surface of which a worktable 11 is provided, the worktable 11 providing a plane for supporting a workpiece 60 to be ground, and a plurality of ball screws 13 vertically arranged at several corner positions of the base 10, each ball screw 13 having a spiral rib 131 formed on its surface, and a spiral ball groove 132 being formed between the pitches of the spiral ribs 131 to allow the plurality of rotating balls B to roll.

[0024] An upper seat 20 has a bottom surface that corresponds to the worktable 11 to form a working space 12 for accommodating the workpiece 60 to be ground. The upper seat 20 is provided with an assembly hole 27 corresponding to each ball screw 13. A lifting unit 30 is assembled in each assembly hole 27. Several combination spaces 201 are provided on the inner edge of the assembly hole 27 for arranging the lifting unit 30. A combination part 22 is provided on one side end of the upper seat 20 corresponding to one of the assembly holes 27 for assembling a driving member 23. The driving member 23 is provided with a driving part 24 inserted into the combination part 22.

[0025] The upper seat 20 is also equipped with a motor 21 located in a predetermined position. The motor 21 drives a tool belt 25, which in turn drives a tool shaft 28 located inside the upper seat 20 to rotate. A conveyor wheel 29 is provided on both sides of the tool shaft 28 to further advance or convey the workpiece 60 to be ground.

[0026] Each lifting unit 30, from bottom to top, includes: a ball nut 40, whose inner peripheral wall is provided with an inner ball groove 48 corresponding to the spiral ball groove 132, through which the spiral ball B is disposed to form a circulating guide screw mechanism; the ball nut 40 is provided with an end plug 44 at each end to prevent the spiral ball B from falling off; a side seat 41 is provided on one side of the ball nut 40, which forms a chamber 42 inside to accommodate a number of circulating balls 43, constituting a circulating guide screw structure; a lifting bushing 50, which is fixed on the ball nut 40, and the ball screw 13 is sleeved inside it; the outer part of the bushing is provided with the following components from bottom to top: The assembly includes a thrust bearing 31, a driven member 32, another thrust bearing 31, and a driven wheel 33, with the driven wheel 33 protruding from the upper end of the assembly hole 27. The lifting bushing 50 has a fixing ring 51 at one end corresponding to the ball nut 40, and the fixing ring 51 has several threaded holes 52. The ball nut 40 has a wing 45 at the fixing ring 51, and the wing 45 has several combination holes 46 corresponding to the threaded holes 52. Several screw components 47 are screwed and fixed to the threaded holes 52 through the combination holes 46. Preferably, the top of the driven wheel 33 is further provided with a nut 34 to fix the lifting bushing 50.

[0027] In each of the lifting units 30, the driven member 32 of one lifting unit 30 can directly mesh with the driving part 24 in the form of a helical gear or worm gear. The driven member 32 is in the form of a helical gear or worm gear. These driven wheels 33 are connected by a driving belt 26, so that when the driving member 23 drives the driven member 32 of one lifting unit 30, its driven wheel 33 can drive the driven wheels 33 of the other lifting units 30 to rotate synchronously, thereby causing each ball nut 40 to rotate synchronously relative to its corresponding ball screw 13, achieving a linear lifting action of the upper seat 20 as a whole. In this embodiment, the driven wheel 33 can be a pulley or sprocket, and the driving belt 26 can be in the form of a belt or chain.

[0028] In summary, the present invention has the following implementation effects and technical advantages: 1. By using the spiral ball B to perform the guide screw rolling, the clearance error can be greatly reduced compared with the traditional screw thread structure, avoiding the problem of inconsistent planing thickness at both ends of the workpiece 60, thereby greatly improving the high precision of the present invention.

[0029] 2. The circulating rolling mechanism formed by several circulating balls 43 and ball nuts 40 makes the overall lifting action smoother, and the synchronous transmission formed by the driven wheel 33 and the drive belt 26 helps to stabilize the multi-axis lifting, which greatly improves the smoothness and synchronization of the lifting.

[0030] Therefore, this utility model improves the linear lifting stability and precision of the planer upper seat 20 by using multiple lifting units 30 composed of the ball screw 13 and ball nut 40, and by synchronously driving the system of the drive component 23 and drive belt 26, thereby achieving a high-precision planing effect.

[0031] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model, or reasonable combinations of features and solutions from various embodiments, are all within the protection scope of the present utility model.

Claims

1. A modified lifting structure for a wood planer, characterized in that, Include: A base with a worktable on its surface, and a ball screw is vertically installed at each of the multiple corner positions of the base; An upper seat has its bottom surface facing the worktable to form a working space. The upper seat is provided with an assembly hole corresponding to each of the ball screws. A combination part is provided on one side end of the upper seat corresponding to one of the assembly holes. The combination part can be used to assemble a driving component. The driving component is provided with a driving part inserted into the combination part. A motor is located at a predetermined position on the upper seat to drive a tool belt, which in turn drives a tool shaft to rotate. and A plurality of lifting units are respectively assembled in each of the assembly holes. Each lifting unit includes: a ball nut, a lifting sleeve, two thrust bearings, a driven member, and a driven wheel. The ball nut is screwed to its corresponding ball screw. The lifting sleeve is fixed at the upper end of the ball nut. The ball screw is sleeved inside the lifting sleeve. The thrust bearing, the driven member, another thrust bearing, and the driven wheel are arranged sequentially from bottom to top outside the lifting sleeve. The driven wheel protrudes from the upper end of the assembly hole. The driven member can engage with the driving part. Each driven wheel is connected by a driving belt. The driving member drives one of the driven members, thereby causing the driven wheels of each lifting unit to rotate synchronously, thereby driving each ball nut to rotate, so that the upper seat moves linearly up and down relative to the base.

2. The improved lifting structure for a wood planer as described in claim 1, characterized in that, The surface of the ball screw is formed with a spiral rib, and a spiral ball groove is formed between the pitches formed by the spiral rib; the inner peripheral wall of the ball nut is provided with an inner ball groove corresponding to the spiral ball groove, and a number of spiral balls are provided between the inner ball groove and the spiral ball groove. The two ends of the ball nut are respectively provided with an end plug to close the nut, and a chamber is provided on one side to accommodate a number of circulating balls.

3. The improved lifting structure for a wood planer as described in claim 1, characterized in that, The lifting shaft sleeve has a fixed ring edge at one end corresponding to the ball nut. The fixed ring edge has a plurality of screw holes. The ball nut has a wing at the fixed ring edge. The wing has a plurality of combination holes corresponding to the screw holes. A plurality of screw components are screwed and fixed to the screw holes through the combination holes.

4. The improved lifting structure for a wood planer as described in claim 1, characterized in that, The driven wheel is a pulley or a sprocket, and the drive belt is a belt or a chain.

5. The improved lifting structure for a wood planer as described in claim 1, characterized in that, The driving part of the drive component is in the form of a helical gear or a worm gear, and the driven part of the lifting unit is a helical gear or a worm wheel.

6. The improved lifting structure for a wood planer as described in claim 1, characterized in that, A nut is provided at the top of the driven wheel of the lifting unit.

7. The improved lifting structure for a wood planer as described in claim 1, characterized in that, The upper seat has a conveyor wheel on each side of the cutter shaft.

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