Log trimming device capable of quickly and automatically positioning

By introducing a driving wheel and a scale fast positioning cutter into the log edge cutting device, combining the clamping assembly and arc-shaped clamp support, the rapid automatic positioning and cutting of the log is achieved, solving the problems of inefficiency and high safety risks in the prior art.

CN223211554UActive Publication Date: 2025-08-12SHIJIAZHUANG SHUAIZHONG WOOD IND CO LTD
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Patent Information

Application Number
CN202422280136.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-19
Publication Date
2025-08-12
Estimated Expiration
2034-09-19

AI Technical Summary

Technical Problem

During the existing log cutting process, manual coordination and mechanical adjustment of position is required, resulting in inefficient processing and operators approaching machines and tools increase the risk of safety accidents.

Method used

Design a log edge cutting device that can quickly and automatically position, quickly position the position of the cutter on the log through the drive wheel and the scale, fix the log with the clamping components, and support the fixed log cutting position through the arc-shaped plywood to achieve fast and accurate cutting.

Benefits of technology

Improves the efficiency of log cutting, reduces the chances of workers' direct contact with machines, and reduces safety risks.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of edge cutting devices, in particular to a log edge cutting device capable of quickly and automatically positioning, which comprises a workbench, a rectangular sliding rail, a placing table and a clamping component, a rectangular sliding rail used for transversely moving and rapidly positioning the log cutting position is installed on one side of the upper portion of the workbench, and clamping assemblies used for clamping and fixing logs and slidably connected with the workbench are symmetrically arranged on the two sides of the containing table. According to the log cutting device, logs are fixedly clamped through the clamping assembly and driven to move towards the position of the cutter, then the driving wheel drives the cutter to be rapidly positioned to a proper position along the rectangular sliding rail according to the scales, cutting can be conducted, and the position of the cutter on the logs is rapidly positioned through the driving wheel and the scales; by means of the technical scheme, the position, needing to be cut, of the log can be rapidly and accurately found, so that the edge cutting speed is increased, the overall production efficiency is improved, meanwhile, the probability that workers make direct contact with a machine is reduced, and safety risks are further reduced.
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Description

Technical Field

[0001] The utility model relates to the field of trimming devices, in particular to a log trimming device which can be positioned quickly and automatically. Background Art

[0002] Logs refer to intact wood that is cut directly from trees, maintaining the natural state of the trees without any processing or changes. The log trimming device is a mechanical equipment specially used for trimming logs. The logs are first inspected by a detection mechanism (such as an infrared scanner) to obtain their diameter, shape and other parameters, and the detection signal is sent to the control system. The control system then controls the side cutting mechanism, top cutting mechanism and bottom cutting mechanism to trim the logs according to the detected parameters. These cutting mechanisms may include blades, knife shafts, knife seats and other parts. They rotate at high speed under the drive of the main machine and move according to the instructions of the control system to achieve four-sided cutting of the logs.

[0003] Existing log cutting mostly relies on manual labor and mechanical adjustments, which reduces processing efficiency. If used in large-scale production, this low efficiency will significantly affect the overall production schedule. In addition, the need for operators to be close to the machine and cutting tools may increase the risk of safety accidents, especially when operating near high-speed rotating cutting tools. If the operation is improper or the attention is not focused, injuries may occur.

[0004] Therefore, in view of the above-mentioned existing logs, most of the positions are adjusted manually with the help of machinery during cutting, which reduces the processing efficiency. In addition, the operator needs to be close to the machine and the cutter, which may increase the risk of safety accidents. A log trimming device that can be quickly and automatically positioned can be designed. The position of the cutter on the log can be quickly positioned through the drive wheel and the scale to achieve fast positioning and cutting. Utility Model Content

[0005] In order to overcome the problem that the existing logs are mostly cut manually with the help of machines to adjust the position, which reduces the processing efficiency. In addition, the operator needs to be close to the machine and the cutter, which may increase the risk of safety accidents.

[0006] The technical solution of the utility model is: a log trimming device that can be quickly and automatically positioned, comprising a workbench, a rectangular slide rail, a placing table and a clamping assembly; a rectangular slide rail for horizontal movement and quick positioning of the log cutting position is installed on one side above the workbench, a placing table for placing logs and fixedly connected to the workbench is provided on one side of the rectangular slide rail, and clamping assemblies for clamping and fixing the logs and slidingly connected to the workbench are symmetrically provided on both sides of the placing table, a sliding groove is provided on the rectangular slide rail, a scale is provided on one side of the rectangular slide rail, a slide seat is provided above the rectangular slide rail, a driving wheel is installed in a rectangular array at the lower end of the slide seat, the driving wheel drives the slide to slide along the sliding groove and be connected to the rectangular slide rail for sliding, a support column is installed in the middle of the upper end of the slide seat, a rotating column is installed on the upper end of the support column, a rotating block is provided above the support column, the rotating block is rotatably connected to the support column through the rotating column, a bracket is installed on the upper end of the rotating block, and a cutting knife is provided on one side of the upper end of the bracket.

[0007] Preferably, the log is first placed on the placement table, and the two ends of the log are placed on the fixed splints, and then the log is fixedly clamped by the clamping assembly, and the log is driven to the cutting knife position, and then the driving wheel drives the cutting knife to quickly position it to the appropriate position along the rectangular slide rail according to the scale, and then cutting can be carried out. In this process, the position where the log is cut is supported and fixed by the arc-shaped splint to prevent the log from warping. The position of the cutting knife on the log is quickly positioned by the driving wheel and the scale, and the position where the log needs to be cut can be found quickly and accurately, thereby speeding up the trimming speed and improving the overall production efficiency. At the same time, it also reduces the chance of direct contact between workers and machines, further reducing safety risks.

[0008] Preferably, multiple groups of first columns are installed at the edges of both sides of the lower end of the workbench, a base plate fixedly connected to the first columns is provided under the workbench, rectangular slide grooves are symmetrically provided at the edges of both ends above the workbench, a rectangular notch is provided between the two groups of rectangular slide grooves on the workbench, and a receiving box is provided above the base plate corresponding to the rectangular notch.

[0009] Preferably, a driving motor is provided inside the driving wheel, a first motor is installed at one end of the rotating column, a rotating shaft is installed at the upper end of the bracket, the cutter is rotatably connected to the bracket through the rotating shaft, and a second motor is installed on one side of the rotating shaft.

[0010] Preferably, a rectangular groove is provided in the middle of the upper part of the placing table, multiple sets of rollers are longitudinally installed in the middle of the placing table with the rectangular groove, multiple sets of second columns are installed at the edges on both sides of the lower end of the placing table, and strip slides are symmetrically provided at both ends of the lower part of the placing table, and a first threaded rod is horizontally provided in the middle of the placing table with the strip slide, and a third motor is installed at one end of the first threaded rod.

[0011] Preferably, the outside of the first threaded rod is provided with a strip threaded sleeve, the lower end of the strip threaded sleeve is installed with a first rectangular telescopic sleeve, one end of the first rectangular telescopic sleeve is installed with a first cylinder, the inside of the first rectangular telescopic sleeve is provided with a first rectangular telescopic column, the first rectangular telescopic column is installed with a first rotating shaft at one end away from the first rectangular telescopic sleeve, and a fourth motor is installed on one side of the first rotating shaft.

[0012] Preferably, a guide column is provided at one end of the first rectangular telescopic column away from the first rectangular telescopic sleeve, and the guide column is rotatably connected to the first rectangular telescopic column through a first rotating shaft, a second rotating shaft is installed at one end of the guide column away from the first rotating shaft, and a fifth motor is installed on one side of the second rotating shaft, a connecting block is provided above the guide column, and the connecting block is rotatably connected to the guide column through the second rotating shaft, a connecting rotating shaft is linearly symmetrically installed on one side of the connecting block away from the second rotating shaft, an arc-shaped splint is linearly symmetrically provided on one side of the connecting block away from the second rotating shaft, the arc-shaped splint is rotatably connected to the connecting block through the connecting rotating shaft, and a driver is installed at one end of the connecting rotating shaft.

[0013] Preferably, the clamping assembly includes a second rectangular telescopic sleeve, a rectangular threaded sleeve, a second threaded rod, a sixth motor, a fixed splint, a second rectangular telescopic column, a second cylinder and a movable splint. A rectangular threaded sleeve is installed at the lower end of the second rectangular telescopic sleeve, a second threaded rod is passed through the middle of the rectangular threaded sleeve, the second threaded rod is longitudinally arranged along the rectangular slide groove, a sixth motor is installed at one end of the second threaded rod, a fixed splint is installed on one side of the upper end of the second rectangular telescopic sleeve, a second rectangular telescopic column is installed inside the second rectangular telescopic sleeve, a second cylinder is installed on the upper end of the second rectangular telescopic column, and a movable splint is installed on one side of the upper end of the second rectangular telescopic column.

[0014] Beneficial effects of the utility model:

[0015] 1. First, place the log on the placement table and place both ends of the log on the fixed plywood. Then, clamp it with the clamping assembly and drive the log to the cutting knife position. Then, use the driving wheel to drive the cutter to quickly position it along the rectangular slide rail to the appropriate position according to the scale, and then cut it. In this process, the arc-shaped plywood supports and fixes the position of the log to be cut to prevent the log from tilting. The driving wheel and scale are used to quickly locate the position of the cutter on the log, which can quickly and accurately find the position where the log needs to be cut, thereby speeding up the trimming speed and improving the overall production efficiency. At the same time, it also reduces the chance of direct contact between workers and machines, further reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the overall structure of the log trimming device of the present utility model;

[0017] Figure 2 Shown is a schematic diagram of the workbench structure of the log trimming device of the present invention;

[0018] Figure 3 Shown is a schematic diagram of the rectangular slide rail structure of the log trimming device of the present invention;

[0019] Figure 4 Shown is a schematic diagram of the placement table structure of the log trimming device of the present invention;

[0020] Figure 5 Shown is a schematic diagram of the arc-shaped splint structure of the log trimming device of the present invention;

[0021] Figure 6 Shown is a schematic diagram of the movable splint structure of the log trimming device of the present invention.

[0022] Explanation of reference numerals: 1. workbench; 2. rectangular slide rail; 3. placement table; 101. first column; 102. bottom plate; 103. receiving box; 104. rectangular slide groove; 105. rectangular notch; 201. slide groove; 202. scale; 203. slide seat; 204. driving wheel; 205. support column; 206. rotating column; 207. rotating block; 208. first motor; 209. bracket; 210. rotating shaft; 211. second motor; 212. cutter; 301. rectangular groove; 302. roller; 303. second column; 304. strip slide groove; 305. first thread Rod; 306, third motor; 307, strip threaded sleeve; 308, first rectangular telescopic sleeve; 309, first cylinder; 310, first rectangular telescopic column; 311, first rotating shaft; 312, fourth motor; 313, guide column; 314, second rotating shaft; 315, fifth motor; 316, connecting block; 317, connecting rotating shaft; 318, arc-shaped splint; 401, second rectangular telescopic sleeve; 402, rectangular threaded sleeve; 403, second threaded rod; 404, sixth motor; 405, fixed splint; 406, second rectangular telescopic column; 407, second cylinder; 408, movable splint. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] See also Figures 1-6The utility model provides an embodiment: a log trimming device that can be quickly and automatically positioned, comprising a workbench 1, a rectangular slide rail 2, a placement platform 3 and a clamping assembly; a rectangular slide rail 2 for horizontal movement and rapid positioning of the log cutting position is installed on one side of the workbench 1, a placement platform 3 for placing logs and fixedly connected to the workbench 1 is provided on one side of the rectangular slide rail 2, and clamping assemblies for clamping and fixing logs and slidably connected to the workbench 1 are symmetrically provided on both sides of the placement platform 3, a sliding groove 201 is provided on the rectangular slide rail 2, and a scale 2 is provided on one side of the rectangular slide rail 2. 02, a slide 203 is provided above the rectangular slide rail 2, and a driving wheel 204 is installed in a rectangular array at the lower end of the slide 203. The driving wheel 204 drives the slide 203 to slide along the sliding groove 201 and connect with the rectangular slide rail 2. A support column 205 is installed in the middle of the upper end of the slide 203, and a rotating column 206 is installed on the upper end of the support column 205. A rotating block 207 is provided above the support column 205. The rotating block 207 is rotatably connected to the support column 205 through the rotating column 206. A bracket 209 is installed on the upper end of the rotating block 207, and a cutter 212 is provided on one side of the upper end of the bracket 209. Driver

[0025] See also Figure 2 In this embodiment, multiple groups of first columns 101 are installed on the edges of both sides of the lower end of the workbench 1. A bottom plate 102 fixedly connected to the first columns 101 is provided under the workbench 1. Rectangular slides 104 are symmetrically provided at the edges of both ends of the upper side of the workbench 1. The workbench 1 is provided with two groups of rectangular slides 104 with a rectangular notch 105 between them. A receiving box 103 is provided above the bottom plate 102 corresponding to the rectangular notch 105. When the logs are being cut, the wood chips pass through the rectangular notches 105 on the workbench 1 and fall into the receiving box 103 for collection and unified processing. During the log cutting process, the first column 101 firmly supports the workbench 1, thereby improving the stability of the trimming device.

[0026] See also Figure 3 In this embodiment, a driving motor is provided inside the driving wheel 204, a first motor 208 is installed at one end of the rotating column 206, a rotating shaft 210 is installed at the upper end of the bracket 209, and the cutter 212 is rotatably connected to the bracket 209 through the rotating shaft 210. A second motor 211 is installed on one side of the rotating shaft 210. When the log moves to a suitable position toward the cutter 212, the driving motor drives the driving wheel 204 to drive the slide 203 to move horizontally along the sliding groove 201 and the rectangular slide rail 2 according to the scale 202, and quickly positions it to a suitable position. Then, driven by the first motor 208, the rotating block 207 is rotatably connected to the support column 205 through the rotating column 206, driving the cutter 212 to continuously approach the log, and then driven by the second motor 211, the cutter 212 is rotatably connected to the bracket 209 through the rotating shaft 210 to perform a cutting operation.

[0027] See also Figure 4-Figure 5 In this embodiment, a rectangular groove 301 is provided in the middle of the upper part of the placing table 3, and multiple sets of rollers 302 are longitudinally installed in the middle of the placing table 3 with the rectangular groove 301. Multiple sets of second columns 303 are installed on the edges of both sides of the lower end of the placing table 3. Strip slides 304 are symmetrically provided at both ends of the lower part of the placing table 3. A first threaded rod 305 is horizontally provided in the middle of the strip slide 304 of the placing table 3. A third motor 306 is installed at one end of the first threaded rod 305. During the movement of the logs, the roller 302 can improve the efficiency of the log movement. During the movement and cutting of the logs, the second column 303 firmly supports the placing table 3 to improve the stability of the log when cutting. The outer sleeve of the first threaded rod 305 is provided with a strip threaded sleeve 30 7. A first rectangular telescopic sleeve 308 is installed at the lower end of the strip threaded sleeve 307, a first cylinder 309 is installed at one end of the first rectangular telescopic sleeve 308, a first rectangular telescopic column 310 is sleeved inside the first rectangular telescopic sleeve 308, a first rotating shaft 311 is installed at one end of the first rectangular telescopic sleeve 308 away from the first rectangular telescopic sleeve 308, and a fourth motor 312 is installed on one side of the first rotating shaft 311. Before the log is ready to be cut, the first threaded rod 305 is rotated by the drive of the third motor 306 according to the position where the log needs to be cut, and the strip threaded sleeve 307 drives the first rectangular telescopic sleeve 308 to move horizontally to a suitable position along the strip slide 304, and then the first rectangular telescopic column 310 is driven by the drive of the first cylinder 309 to move along the strip slide 304. As the first rectangular telescopic sleeve 308 moves to a suitable position, the guide column 313 is driven by the fourth motor 312 to rotate to a suitable angle with the rectangular telescopic column through the first rotating shaft 311. The first rectangular telescopic column 310 is provided with a guide column 313 at one end away from the first rectangular telescopic sleeve 308. The guide column 313 is rotatably connected to the first rectangular telescopic column 310 through the first rotating shaft 311. The second rotating shaft 314 is installed at the end of the guide column 313 away from the first rotating shaft 311. A fifth motor 315 is installed on one side of the second rotating shaft 314. A connecting block 316 is provided above the guide column 313. The connecting block 316 is rotatably connected to the guide column 313 through the second rotating shaft 314. The connecting block 316 is linearly symmetrically installed with a connecting block on the side away from the second rotating shaft 314. Connecting the rotating shaft 317, the connecting block 316 is linearly symmetrically provided with an arc-shaped splint 318 on the side away from the second rotating shaft 314. The arc-shaped splint 318 is rotatably connected to the connecting block 316 through the connecting rotating shaft 317. A driver is installed at one end of the connecting rotating shaft 317 (the driver signal is AQMD6030BLS-E3). Driven by the fifth motor 315, the connecting block 316 is rotated to a suitable angle through the second rotating shaft 314 and the guide column 313. Through continuous movement and rotation adjustment, the edge of the log is located between the two sets of arc-shaped splints 318. Then, driven by the driver, the arc-shaped splint 318 is rotatably connected to the connecting block 316 through the connecting rotating shaft 317, so as to firmly fix the position where the log is to be cut to prevent the log from warping.

[0028] See also Figure 6 In this embodiment, the clamping assembly includes a second rectangular telescopic sleeve 401, a rectangular threaded sleeve 402, a second threaded rod 403, a sixth motor 404, a fixed splint 405, a second rectangular telescopic column 406, a second cylinder 407 and a movable splint 408. The rectangular threaded sleeve 402 is installed at the lower end of the second rectangular telescopic sleeve 401, and the second threaded rod 403 is passed through the middle of the rectangular threaded sleeve 402. The second threaded rod 403 is longitudinally arranged along the rectangular slide 104. The sixth motor 404 is installed at one end of the second threaded rod 403. A fixed splint 405 is installed on one side of the upper end of the second rectangular telescopic sleeve 401. The second rectangular telescopic column 406 is sleeved inside the second rectangular telescopic sleeve 401. A second cylinder 407 is installed on the upper end of the contraction column 406, and a movable splint 408 is installed on one side of the upper end of the second rectangular telescopic column 406. First, the log is placed on the placement table 3, and both ends of the log are placed on the fixed splint 405. Then, driven by the second cylinder 407, the second rectangular telescopic column 406 drives the movable splint 408 to move downward along the second rectangular telescopic sleeve 401, so that the movable splint 408 cooperates with the fixed splint 405 to fix and clamp the log. Then, driven by the sixth motor 404, the second threaded rod 403 rotates, so that the rectangular threaded sleeve 402 drives the second rectangular telescopic sleeve 401 to move longitudinally along the rectangular slide 104 to a suitable position, which is convenient for cutting the log.

[0029] When working, the log is first placed on the placement table 3, and both ends of the log are placed on the fixed clamping plate 405. Then, driven by the second cylinder 407, the second rectangular telescopic column 406 drives the movable clamping plate 408 to move downward along the second rectangular telescopic sleeve 401, so that the movable clamping plate 408 cooperates with the fixed clamping plate 405 to fix and clamp the log. Then, driven by the sixth motor 404, the second threaded rod 403 rotates, so that the rectangular threaded sleeve 402 drives the second rectangular telescopic sleeve 401 to move longitudinally along the rectangular slide 104 to a suitable position, so that the log can be cut conveniently.

[0030] During the log movement process, the roller 302 can improve the efficiency of log movement. Before the log is ready to be cut, according to the position where the log needs to be cut, the first threaded rod 305 is rotated by the drive of the third motor 306, and the strip threaded sleeve 307 drives the first rectangular telescopic sleeve 308 to move horizontally along the strip slide 304 to a suitable position. Then, the first rectangular telescopic column 310 is driven by the drive of the first cylinder 309 to move along the first rectangular telescopic sleeve 308 to a suitable position, and then the fourth motor 312 is driven to move the first rectangular telescopic column 310 to a suitable position. The guide column 313 is rotated to a suitable angle through the first rotating shaft 311 and the rectangular telescopic column. Then, driven by the fifth motor 315, the connecting block 316 is rotated to a suitable angle through the second rotating shaft 314 and the guide column 313. Through continuous movement and rotation adjustment, the edge of the log is located between the two sets of arc-shaped clamping plates 318. Then, driven by the driver, the arc-shaped clamping plates 318 are rotated and connected to the connecting block 316 through the connecting rotating shaft 317, thereby firmly fixing the position of the log to be cut and preventing the log from tilting.

[0031] When the log moves to the appropriate position toward the cutter 212, the drive motor drives the drive wheel 204 to move the slide 203 laterally along the slide groove 201 and the rectangular slide rail 2 according to the scale 202, and quickly positions it to the appropriate position. Then, driven by the first motor 208, the rotating block 207 is rotatably connected to the support column 205 through the rotating column 206, driving the cutter 212 to continuously approach the log. Then, driven by the second motor 211, the cutter 212 is rotatably connected to the bracket 209 through the rotating shaft 210 to perform the cutting operation. When the log is being cut, wood chips pass through the rectangular notch 105 on the workbench 1 and fall into the receiving box 103 for collection and unified processing.

[0032] Through the above steps, the log is first placed on the placement table 3, and the two ends of the log are placed on the fixed splint 405, and then the log is fixedly clamped by the clamping assembly, and the log is driven to move to the position of the cutter 212, and then the drive wheel 204 drives the cutter 212 to be quickly positioned to the appropriate position along the rectangular slide rail 2 according to the scale 202, and then cutting can be carried out. In this process, the position of the log to be cut is supported and fixed by the arc splint 318 to prevent the log from tilting. The position of the cutter 212 on the log is quickly positioned by the drive wheel 204 and the scale 202, and the position where the log needs to be cut can be found quickly and accurately, thereby speeding up the trimming speed and improving the overall production efficiency. At the same time, it also reduces the chance of direct contact between workers and machines, further reducing safety risks, so as to solve the problem that when cutting existing logs, most of the time, manual labor is used to cooperate with the machine to adjust the position, which reduces processing efficiency. In addition, the operator needs to be close to the machine and the cutter, which may increase the risk of safety accidents.

Claims

1. A log trimming device capable of rapid and automatic positioning, comprising a workbench (1); characterized in that: The invention also comprises a rectangular slide rail (2), a placement table (3) and a clamping assembly; a rectangular slide rail (2) for horizontal movement and rapid positioning of the log cutting position is installed on one side above the workbench (1); a placement table (3) for placing logs and fixedly connected to the workbench (1) is provided on one side of the rectangular slide rail (2); clamping assemblies for clamping and fixing logs and slidably connected to the workbench (1) are symmetrically provided on both sides of the placement table (3); a sliding groove (201) is provided on the rectangular slide rail (2); a scale (202) is provided on one side of the rectangular slide rail (2); a slide seat (203) is provided above the rectangular slide rail (2); and the slide seat (204) is provided on the upper side of the rectangular slide rail (2). 03) A driving wheel (204) is installed on the rectangular array at the lower end, and the driving wheel (204) drives the slide (203) to slide along the sliding groove (201) and connect with the rectangular slide rail (2). A support column (205) is installed in the middle of the upper end of the slide (203), and a rotating column (206) is installed on the upper end of the support column (205). A rotating block (207) is provided above the support column (205), and the rotating block (207) is rotatably connected to the support column (205) through the rotating column (206). A bracket (209) is installed on the upper end of the rotating block (207), and a cutter (212) is provided on one side of the upper end of the bracket (209).

2. The log trimming device capable of rapid and automatic positioning according to claim 1, characterized in that: A plurality of first columns (101) are installed at the edges of both sides of the lower end of the workbench (1), a bottom plate (102) fixedly connected to the first columns (101) is provided below the workbench (1), rectangular slide grooves (104) are symmetrically provided at the edges of both ends above the workbench (1), a rectangular notch (105) is provided between the two groups of rectangular slide grooves (104) provided on the workbench (1), and a receiving box (103) is provided above the bottom plate (102) corresponding to the rectangular notch (105).

3. The log trimming device capable of rapid and automatic positioning according to claim 1, characterized in that: A driving motor is provided inside the driving wheel (204), a first motor (208) is installed at one end of the rotating column (206), a rotating shaft (210) is installed at the upper end of the bracket (209), a cutter (212) is rotatably connected to the bracket (209) via the rotating shaft (210), and a second motor (211) is installed on one side of the rotating shaft (210).

4. The log trimming device capable of rapid and automatic positioning according to claim 1, characterized in that: A rectangular groove (301) is provided in the middle of the upper portion of the placing platform (3), a plurality of rollers (302) are longitudinally mounted in the middle portion of the placing platform (3) where the rectangular groove (301) is provided, a plurality of second uprights (303) are mounted on the edges of both sides of the lower end of the placing platform (3), strip-shaped slide grooves (304) are symmetrically provided at both ends of the lower portion of the placing platform (3), a first threaded rod (305) is transversely mounted in the middle portion of the placing platform (3) where the strip-shaped slide groove (304) is provided, and a third motor (306) is mounted on one end of the first threaded rod (305).

5. The log trimming device capable of rapid and automatic positioning according to claim 4, characterized in that: The first threaded rod (305) is externally sleeved with a strip threaded sleeve (307), the lower end of the strip threaded sleeve (307) is mounted with a first rectangular telescopic sleeve (308), one end of the first rectangular telescopic sleeve (308) is mounted with a first cylinder (309), the interior of the first rectangular telescopic sleeve (308) is sleeved with a first rectangular telescopic column (310), one end of the first rectangular telescopic column (310) away from the first rectangular telescopic sleeve (308) is mounted with a first rotating shaft (311), and one side of the first rotating shaft (311) is mounted with a fourth motor (312).

6. The log trimming device capable of rapid and automatic positioning according to claim 5, characterized in that: A guide post (313) is provided at one end of the first rectangular telescopic post (310) away from the first rectangular telescopic sleeve (308), and the guide post (313) is rotatably connected to the first rectangular telescopic post (310) through a first rotating shaft (311). A second rotating shaft (314) is installed at one end of the guide post (313) away from the first rotating shaft (311), and a fifth motor (315) is installed on one side of the second rotating shaft (314). A connecting block (316) is provided above the guide post (313) to connect The block (316) is rotatably connected to the guide column (313) via the second rotating shaft (314); a connecting shaft (317) is linearly symmetrically installed on one side of the connecting block (316) away from the second rotating shaft (314); an arc-shaped clamping plate (318) is linearly symmetrically installed on one side of the connecting block (316) away from the second rotating shaft (314); the arc-shaped clamping plate (318) is rotatably connected to the connecting block (316) via the connecting shaft (317); and a driver is installed at one end of the connecting shaft (317).

7. The log trimming device capable of rapid and automatic positioning according to claim 2, characterized in that: The clamping assembly comprises a second rectangular telescopic sleeve (401), a rectangular threaded sleeve (402), a second threaded rod (403), a sixth motor (404), a fixed splint (405), a second rectangular telescopic column (406), a second cylinder (407) and a movable splint (408). The lower end of the second rectangular telescopic sleeve (401) is provided with a rectangular threaded sleeve (402), the middle part of the rectangular threaded sleeve (402) is provided with a second threaded rod (403), the second threaded rod (403) is longitudinally arranged along the rectangular slide groove (104), one end of the second threaded rod (403) is provided with the sixth motor (404), a fixed splint (405) is provided on one side of the upper end of the second rectangular telescopic sleeve (401), the interior of the second rectangular telescopic sleeve (401) is provided with a second rectangular telescopic column (406), the upper end of the second rectangular telescopic column (406) is provided with a second cylinder (407), and a movable splint (408) is provided on one side of the upper end of the second rectangular telescopic column (406).