A wood classification and screening device for forestry economic management
By combining guide plates, guide grooves, and gear transmission, the rotation problem caused by frictional differences and center of gravity shift in the wood screening device is solved, achieving efficient and accurate screening of multi-specification wood, and reducing the difficulty and effort required for operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI UNIVERSITY OF FINANCE AND ECONOMICS
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-07
AI Technical Summary
Existing wood screening devices lack effective flow guiding mechanisms, causing wood to rotate during screening due to differences in friction or shift in center of gravity, which affects screening efficiency and accuracy.
Symmetrically arranged guide plates and through guide grooves form a closed flow channel. Combined with gear transmission and bidirectional thread, the spacing between the guide plates can be adjusted by shaking the rocker arm. Wear-resistant liners ensure the flatness of the contact surface and the stability of friction, preventing the wood from becoming disordered. The gear meshing transmission creates a speed reduction and torque increase effect, making operation labor-saving.
It effectively constrains the posture of the wood, prevents rotation, improves screening efficiency and accuracy, adapts to the screening of wood of different specifications, and eliminates the need to replace the sieve plate or guide components, thus reducing the difficulty and effort required for operation.
Smart Images
Figure CN224463213U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of timber classification and screening technology, specifically a timber classification and screening device for forestry economic management. Background Technology
[0002] The timber sorting and screening device for forestry economic management is a mechanical device specifically designed for timber processing and sorting in forestry economic management. Its main purpose is to perform preliminary treatment and sorting of logs in order to manage and use timber resources more efficiently. These devices are widely used in various forestry production, timber processing, furniture manufacturing and other industries, and can effectively improve the utilization efficiency of timber resources, reduce labor costs and improve production efficiency.
[0003] Existing wood screening devices typically lack effective flow guiding mechanisms, causing wood to rely mainly on gravity and friction from the screening surface when it is sifted through an inclined screening surface. When there are differences in the friction between the wood surface and the contact point of the screening surface (e.g., insufficient flatness of the screening surface, offset of the wood's center of gravity), the wood, which was originally in a parallel state, may be affected by these factors and gradually rotate around the longitudinal axis, eventually entering a vertical state, resulting in poor screening effect and affecting screening efficiency and accuracy.
[0004] In view of this, the present invention solves the above-mentioned technical problems by proposing a timber classification and screening device for forestry economic management. Utility Model Content
[0005] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a timber sorting and screening device for forestry economic management. Firstly, the device forms a closed flow channel through symmetrically arranged guide plates and a through-type guide groove. When timber slides along the guide groove under gravity, the inner walls on both sides provide bidirectional restraint, effectively constraining the timber's posture and preventing rotation around the longitudinal axis due to differences in friction on the screening surface or shift in the center of gravity. Simultaneously, the wear-resistant lining plate on the inner wall of the guide groove ensures the flatness of the contact surface and the stability of friction, further reducing the possibility of timber posture disorder. This solves the problem in existing technologies where timber easily enters a vertical state, leading to screening failure. Secondly, the device utilizes gear transmission and a bidirectional thread... With its synergistic effect, the operator can easily adjust the distance between the two guide plates by shaking the rocker arm to adapt to timber of different lengths. Compared with existing fixed-size screening devices, it can screen timber of various specifications without changing the sieve plates or flow guiding components, thus improving the applicability of the equipment. Finally, the drive structure adopts gear meshing transmission (the diameter of the driving gear is smaller than that of the driven gear), which creates a speed reduction and torque increase effect. The operator can operate the rocker arm with less effort by shaking it with the non-slip handle. Even when adjusting the guide plates with a large gap, it can be done easily, solving the problem of laborious manual adjustment in existing devices. In addition, the limiting structure ensures that the guide plates are stable and do not wobble during the translation process, avoiding the impact of adjustment deviation on the screening effect and reducing the difficulty of operation.
[0006] This utility model provides the following technical solution: a timber sorting and screening device for forestry economic management, comprising an inclined frame and a sieve plate embedded in the inner cavity of the frame;
[0007] Multiple sliding grooves a are symmetrically opened in the middle of the top of the frame. Two guide plates are symmetrically arranged above the sliding grooves a on the top of the frame. A guide groove is opened through one end of each guide plate. Multiple drop grooves are opened through the bottom of the inner wall of the guide groove.
[0008] Each of the sliding grooves a has a sliding plate a slidably connected to its inner cavity, and the top of the sliding plate a is fixedly connected to the bottom of the guide plate.
[0009] Two fixed plates a are symmetrically fixedly connected to the middle of the bottom of the frame. The inner cavities of the two fixed plates a are rotatably connected to a rotating shaft through bearings. The surface of the rotating shaft is provided with a bidirectional thread, and the surface of the bidirectional thread is threadedly connected to the inner cavity of the sliding plate a.
[0010] The bottom of the frame is provided with a drive structure for driving the rotating shaft to rotate;
[0011] The top of the frame is provided with two sets of limiting structures on both sides for guiding the movement of the guide plate.
[0012] As a preferred technical solution of this utility model, the drive structure includes two connecting plates fixedly connected to the bottom of the frame, a drive gear is rotatably connected between the two connecting plates by a pin, a driven gear is fixedly connected to the surface of the rotating shaft, and a rocker arm is fixedly connected to one end of the drive gear pin.
[0013] As a preferred technical solution of this utility model, each set of limiting structures includes two sliding grooves b symmetrically opened on one side of the top of the frame. A sliding plate b is slidably connected to the inner cavity of each sliding groove b. The top of the sliding plate b is fixedly connected to the bottom of the guide plate. Two fixing plates b are symmetrically fixedly connected to one side of the bottom of the frame. A guide rod is fixedly connected between each fixing plate b. The inner cavity of the sliding plate b is fixedly connected to the surface of the guide rod.
[0014] As a preferred embodiment of this utility model, the sieve plate is provided with three sieve holes along the inclined direction, the number of the drop grooves is the same as the number of sieve holes, and the width of each drop groove is adapted to the width of the corresponding sieve hole.
[0015] In a preferred embodiment of this invention, the diameter of the driving gear is smaller than that of the driven gear, and the driving gear and the driven gear are meshed together.
[0016] As a preferred embodiment of this utility model, one end of the rocker arm is provided with an anti-slip handle, and the surface of the anti-slip handle is knurled.
[0017] As a preferred embodiment of this utility model, the inner wall of the guide groove of the guide plate is provided with a wear-resistant liner, which is a polytetrafluoroethylene wear-resistant liner.
[0018] As a preferred embodiment of this utility model, the bottom four corners of the frame are respectively fixedly connected with support columns, and each support column is internally threaded with an adjustable support foot.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] The device forms a closed flow channel through symmetrically arranged guide plates and through guide grooves. When the wood slides along the guide grooves under the action of gravity, the inner walls on both sides form a bidirectional limit on the wood, effectively constraining the posture of the wood and preventing it from rotating around the longitudinal axis due to the difference in friction force on the screening surface or the shift of the center of gravity. At the same time, the wear-resistant lining plate on the inner wall of the guide groove ensures the flatness of the contact surface and the stability of friction force, further reducing the possibility of wood posture disorder and solving the problem of wood easily entering a vertical state and causing screening failure in the prior art.
[0021] With the combined effect of gear transmission and bidirectional thread, operators can easily adjust the distance between the two guide plates by shaking the rocker arm to adapt to timber of different lengths. Compared with existing fixed-size screening devices, it can complete the screening of timber of various specifications without replacing the screen plates or flow guiding components, thus improving the applicability of the equipment.
[0022] The drive structure adopts gear meshing transmission (the diameter of the driving gear is smaller than that of the driven gear), which creates a speed reduction and torque increase effect. Operators can operate the rocker arm with less effort by shaking it with the non-slip handle. Even when adjusting the large-spacing guide plate, it can be easily completed, solving the problem of laborious manual adjustment in existing devices. In addition, the limiting structure ensures that the guide plate moves stably without shaking during the translation process, avoiding the impact of adjustment deviation on the screening effect and reducing the difficulty of operation. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the bidirectional threaded structure of this utility model;
[0025] Figure 3 This is an exploded view of the present invention;
[0026] Figure 4 This is a schematic diagram of the frame structure of this utility model;
[0027] Figure 5 This is a partially enlarged view of the present invention.
[0028] In the diagram: 1. Frame; 101. Screen plate; 2. Sliding groove a; 201. Guide plate; 202. Guide groove; 203. Drop groove; 3. Sliding plate a; 301. Fixed plate a; 302. Rotating shaft; 303. Bidirectional thread; 4. Connecting plate; 401. Driving gear; 402. Driven gear; 403. Rocker arm; 5. Sliding groove b; 501. Sliding plate b; 502. Fixed plate b; 503. Guide rod; 6. Wear-resistant liner; 7. Support column; 701. Adjustable support foot. Detailed Implementation
[0029] 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.
[0030] Please see Figure 1-5As shown, a timber sorting and screening device for forestry economic management includes an inclined frame 1 and a sieve plate 101 embedded in the inner cavity of the frame 1.
[0031] Multiple sliding grooves a2 are symmetrically opened in the middle of the top of the frame 1. Two guide plates 201 are symmetrically arranged on the top of the frame 1 above the sliding grooves a2. A guide groove 202 is opened through one end of each guide plate 201. Multiple drop grooves 203 are opened through the bottom of the inner wall of the guide groove 202.
[0032] Each sliding groove a2 has a sliding plate a3 slidably connected to its inner cavity, and the top of the sliding plate a3 is fixedly connected to the bottom of the guide plate 201.
[0033] Two fixed plates a301 are symmetrically fixedly connected to the middle of the bottom of the frame 1. The inner cavities of the two fixed plates a301 are connected to a rotating shaft 302 through bearings. The surface of the rotating shaft 302 is provided with a bidirectional thread 303, and the surface of the bidirectional thread 303 is threadedly connected to the inner cavity of the sliding plate a3.
[0034] The bottom of the frame 1 is provided with a drive structure for driving the rotating shaft 302 to rotate;
[0035] The top of the frame 1 is provided with two sets of limiting structures on both sides for guiding the movement of the guide plate 201;
[0036] The drive structure includes two connecting plates 4 fixedly connected to the bottom of the frame 1. A drive gear 401 is rotatably connected between the two connecting plates 4 via a pin. A driven gear 402 is fixedly connected to the surface of the rotating shaft 302. A rocker arm 403 is fixedly connected to one end of the pin of the drive gear 401.
[0037] Each set of limiting structures includes two sliding grooves b5 symmetrically opened on one side of the top of the frame 1. A sliding plate b501 is slidably connected to the inner cavity of each sliding groove b5. The top of the sliding plate b501 is fixedly connected to the bottom of the guide plate 201. Two fixed plates b502 are symmetrically fixedly connected to one side of the bottom of the frame 1. A guide rod 503 is fixedly connected between each fixed plate b502. The inner cavity of the sliding plate b501 is fixedly connected to the surface of the guide rod 503.
[0038] The sieve plate 101 is provided with three sieve holes along the inclined direction. The number of drop grooves 203 is the same as the number of sieve holes, and the width of each drop groove 203 is adapted to the width of the corresponding sieve hole.
[0039] The diameter of the driving gear 401 is smaller than the diameter of the driven gear 402, and the driving gear 401 and the driven gear 402 are meshed together.
[0040] One end of the joystick 403 is equipped with a non-slip handle, and the surface of the non-slip handle is knurled.
[0041] The inner wall of the guide groove 202 of the guide plate 201 is provided with a wear-resistant liner 6, which is a polytetrafluoroethylene wear-resistant liner.
[0042] Support columns 7 are fixedly connected to the four corners of the bottom of the frame 1, and each support column 7 is threaded with an adjustable support foot 701.
[0043] Before the device is put into operation, the distance between the two guide plates 201 is adjusted by the drive structure to accommodate different sizes of wood. The operator shakes the rocker arm 403 with the anti-slip handle. The drive gear 401 rotates around the pin on the connecting plate 4. Because the drive gear 401 meshes with the driven gear 402, it drives the rotating shaft 302 to rotate under the bearing support of the fixed plate a301. The bidirectional thread 303 on the surface of the rotating shaft 302 is threaded with the inner cavity of the sliding plate a3, causing the two sliding plates a3 to slide synchronously in opposite directions along the sliding groove a2, thereby driving the top fixed guide plate 201 to move horizontally. During this process, the sliding plate b501 of the limiting structure slides along the guide rod 503 (the guide rod 503 is fixed to the fixed plate b502). At the same time, the sliding plate b501 is limited in the sliding groove b5 to ensure that the guide plate 201 moves stably without deviation.
[0044] The timber to be screened is fed into the guide groove 202 inlet of the guide plate 201. Because the frame 1 is set at an inclination, the timber slides down the guide groove 202 under the action of gravity. The drop groove 203 at the bottom of the guide groove 202 and the corresponding screen hole on the screen plate 101 form a screening channel. During the sliding process, when the diameter of the timber matches the width of the drop groove 203 and the screen hole on the screen plate 101, the timber will be discharged through the drop groove 203 and the screen hole on the screen plate 101. Timber that does not match will continue to slide through the guide groove 202 until it is discharged.
[0045] Wear-resistant liner 6 reduces frictional wear between the wood and the inner wall of the guide groove 202, extending the life of the device;
[0046] The adjustable support foot 701 adjusts the tilt angle of the frame 1 by threading with the support column 7, thereby controlling the speed at which the wood slides down to optimize the screening efficiency.
[0047] The non-slip handle (with knurling) improves the stability of the joystick 403 and prevents hand slippage.
[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.
[0049] 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 timber sorting and screening device for forestry economic management, comprising: The frame (1) is inclined and the sieve plate (101) is embedded in the inner cavity of the frame (1). The features are as follows: a plurality of sliding grooves a (2) are symmetrically opened in the middle of the top of the frame (1), and two guide plates (201) are symmetrically arranged on the top of the frame (1) above the sliding grooves a (2). A guide groove (202) is opened through one end of each guide plate (201), and a plurality of falling grooves (203) are opened through the bottom of the inner wall of the guide groove (202). Each of the sliding grooves a (2) has a sliding plate a (3) slidably connected to its inner cavity, and the top of the sliding plate a (3) is fixedly connected to the bottom of the guide plate (201). Two fixed plates a (301) are symmetrically fixedly connected to the middle of the bottom of the frame (1). The inner cavities of the two fixed plates a (301) are connected to a rotating shaft (302) through bearings. The surface of the rotating shaft (302) is provided with a bidirectional thread (303). The surface of the bidirectional thread (303) is threadedly connected to the inner cavity of the sliding plate a (3). The bottom of the frame (1) is provided with a drive structure for driving the rotating shaft (302) to rotate; The top of the frame (1) is provided with two sets of limiting structures on both sides for guiding the movement of the guide plate (201).
2. The timber sorting and screening device for forestry economic management according to claim 1, characterized in that: The drive structure includes two connecting plates (4) fixedly connected to the bottom of the frame (1). A drive gear (401) is rotatably connected between the two connecting plates (4) via a pin. A driven gear (402) is fixedly connected to the surface of the rotating shaft (302). A rocker arm (403) is fixedly connected to one end of the pin of the drive gear (401).
3. The timber classification and screening device for forestry economic management according to claim 1, characterized in that: Each set of limiting structures includes two sliding grooves b (5) symmetrically opened on one side of the top of the frame (1). Each sliding groove b (5) has a sliding plate b (501) slidably connected to its inner cavity. The top of the sliding plate b (501) is fixedly connected to the bottom of the guide plate (201). Two fixing plates b (502) are symmetrically fixedly connected to one side of the bottom of the frame (1). A guide rod (503) is fixedly connected between each fixing plate b (502). The inner cavity of the sliding plate b (501) is fixedly connected to the surface of the guide rod (503).
4. The timber classification and screening device for forestry economic management according to claim 1, characterized in that: The sieve plate (101) is provided with three sieve holes along the inclined direction. The number of the drop grooves (203) is the same as the number of sieve holes, and the width of each drop groove (203) is adapted to the width of the corresponding sieve hole.
5. A timber sorting and screening device for forestry economic management according to claim 2, characterized in that: The diameter of the driving gear (401) is smaller than the diameter of the driven gear (402), and the driving gear (401) and the driven gear (402) are meshed together.
6. The timber classification and screening device for forestry economic management according to claim 2, characterized in that: One end of the rocker arm (403) is provided with an anti-slip handle, and the surface of the anti-slip handle is knurled.
7. The timber classification and screening device for forestry economic management according to claim 1, characterized in that: The inner wall of the guide groove (202) of the guide plate (201) is provided with a wear-resistant liner (6), and the wear-resistant liner (6) is a polytetrafluoroethylene wear-resistant liner.
8. A timber sorting and screening device for forestry economic management according to claim 1, characterized in that: The bottom four corners of the frame (1) are respectively fixedly connected to support columns (7), and each support column (7) is threaded with an adjustable support foot (701).