A wood chipper with an anti-jamming mechanism

Abstract

This utility model relates to the field of anti-jamming technology for wood chippers, and in particular to a wood chipper with an anti-jamming mechanism. It includes a pressure roller housed within a machine casing, a chain conveyor assembly located below the pressure roller, and a cutting roller housed within the machine casing in conjunction with the chain conveyor assembly. The wood chipper with the anti-jamming mechanism also includes a screen; the screen is positioned below the cutting roller; one end of the screen is hinged to the inner wall of the machine casing, and the other end rests on a limiting mechanism; the limiting mechanism is located between the screen and the chain conveyor assembly, and below the cutting roller. Compared with existing technologies, when jamming occurs, the limiting mechanism activates, causing the screen to rotate around its hinge point with the machine casing, expanding the space between the screen and the cutting roller, reducing jamming, and is simple to set up, low in cost, and conducive to widespread adoption.

Description

Technical Field

[0001] This utility model relates to the field of anti-jamming technology for wood chippers, and in particular to a wood chipper with an anti-jamming mechanism. Background Technology

[0002] Wood chippers are key pieces of equipment in the wood processing industry, widely used in papermaking, engineered wood products, biomass energy, and many other sectors. They can cut various logs, branches, and wood scraps into uniform wood chips, providing suitable base materials for subsequent processing steps. Wood chippers primarily achieve wood cutting through the interaction of a high-speed rotating cutter head and a fixed base plate. When wood enters the equipment through the feed inlet, it is quickly grabbed and cut by the blades on the high-speed rotating cutter head. During the cutting process, the high-speed rotation of the cutter head generates a strong centrifugal force, throwing out the cut wood chips, which are then discharged from the equipment through the outlet.

[0003] During the cutting process, wood chips are prone to jamming between the cutter head and the base plate. To solve this problem, a feeding anti-blocking control system and automatic unblocking method for a wood chipper, as disclosed in announcement number CN119116079A, is provided. This system includes a feeding conveyor system, a cutting roller, and a feeding pressure roller. The upper surface of the wood conveyor belt is arranged at an angle ∠a to the horizontal line, where ∠a is an acute angle. The automatic unblocking method includes the following steps: S1: If the actual pressure monitored by the pressure-sensitive module meets the set blocking pressure threshold, it is determined to be a blockage; S2: The drive modules of the feeding conveyor system and the feeding pressure roller are controlled to stop driving or reverse driving; S3: The telescopic cylinder is controlled to rise, causing the lifting rod to reach its highest position, and then the telescopic cylinder is controlled to reset; S4: The drive modules of the feeding conveyor system and the feeding pressure roller are controlled to drive the feeding normally.

[0004] The above solution uses telescopic rods and pressure-sensitive modules to control the screen's movement, resulting in a complex and costly overall control system that is not conducive to widespread adoption. Utility Model Content

[0005] To address the problems of complex overall control systems, high costs, and limited adoption in current systems, this utility model provides a wood chipper with an anti-jamming mechanism.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] A wood chipper with an anti-jamming mechanism includes a pressure roller housed within a casing, a chain conveyor assembly located below the pressure roller, and a cutting roller housed within the casing in conjunction with the chain conveyor assembly. The wood chipper also includes a screen; the screen is positioned below the cutting roller; one end of the screen is hinged to the inner wall of the casing, and the other end rests on a limiting mechanism; the limiting mechanism is located between the screen and the chain conveyor assembly, and below the cutting roller. When jamming occurs, the limiting mechanism activates, causing the screen to rotate around its hinge point with the casing, expanding the space between the screen and the cutting roller, reducing jamming. This design is simple to implement, low in cost, and conducive to widespread adoption.

[0008] Preferably, the limiting mechanism includes a limiting member; the limiting member is coaxially arranged with the sprocket of the chain conveyor assembly; the limiting member is located between the inner wall of the housing and the sprocket; a support shaft is provided on the limiting member; the support shaft passes through the housing and is connected to a support assembly; one end of the support assembly is hinged to the outer wall of the housing, and the other end is connected to the outer wall of the housing; an arc-shaped opening is provided on the outer wall of the housing to cooperate with the support shaft. When material jams, the pressure on the screen increases, the connection between the support assembly and the outer wall of the housing disengages, the support assembly rotates around its hinge point with the outer wall of the housing, thereby driving the support shaft to fall and move along the arc-shaped opening, and the screen rotates around its hinge point with the inner wall of the housing, expanding the space between the screen and the cutting roller and reducing material jamming.

[0009] Preferably, the limiting component includes a fixed disk portion; a protrusion is provided on the outer peripheral wall of the fixed disk portion; one end of the screen is placed on the top surface of the protrusion; and a support shaft is disposed on the fixed disk portion. The fixed disk portion, as a basic component, provides a stable mounting base for the limiting component. The protrusion on the outer peripheral wall provides reliable support and positioning for the screen, ensuring that one end of the screen can be stably placed on the top surface of the protrusion, thus guaranteeing the stability of the screen during operation.

[0010] Preferably, protrusions are provided on both sides of the bottom surface of the screen; the protrusions are hinged to the inner wall of the machine casing by pins; the end of the screen away from the protrusions rests on the protrusions. The protrusions on both sides of the bottom surface of the screen are hinged to the inner wall of the machine casing by pins, forming a flexible rotating connection, which allows the screen to swing to a certain extent, thereby facilitating the release of stuck materials.

[0011] Preferably, the support assembly includes a hinge and a connector; the hinge includes a straight rod portion; a support portion is fixedly disposed on the upper right side of the straight rod portion; the upper part of the straight rod portion is hinged to the outer wall of the machine housing; a support shaft passes through the machine housing and is placed on the support portion; a through hole is provided at the lower part of the straight rod portion; a connector is inserted through the through hole; the connector is connected to the outer wall of the machine housing. When the support shaft presses down on the support portion, it causes the hinge to rotate around it and the outer wall of the machine housing, breaking the connector, and the support shaft continues to fall, expanding the space between the screen and the cutting roller.

[0012] Preferably, the connector is bolt-shaped; the connector passes through the through hole and is threaded to the outer wall of the housing. The bolt-shaped connector has a standard and compliant shape, facilitating manufacturing and installation, ensuring its versatility, and reducing costs.

[0013] Preferably, the connector has a notch extending inward from the outer wall. The notch serves as a stress concentration point when the connector is under stress, ensuring that the connector will not break.

[0014] Preferably, the wood chipper with anti-jamming mechanism further includes a reset mechanism; the reset mechanism includes a hydraulic cylinder; the cylinder body is hinged to the outer wall of the machine housing, and the piston rod of the hydraulic cylinder is connected to a support block. The support block can be used to support the support shaft, and the hydraulic cylinder can be used to move the support shaft upward along the arc-shaped opening, which facilitates the reset of the limiting mechanism and the screen.

[0015] Preferably, the support block is shaped like a semi-circular ring. This semi-circular ring structure adapts well to the shape of the support shaft, conforming closely to its surface and greatly facilitating the support block's lifting action. Furthermore, the semi-circular ring design is simple and practical, easy to manufacture, reduces production costs, and is convenient for installation and maintenance.

[0016] As can be seen from the above technical solutions, the advantages of this utility model include: when material jamming occurs, the limiting mechanism is activated, and the screen rotates around the hinge point between it and the machine casing, which expands the space between the screen and the cutting roller, reduces material jamming, and is simple to set up, low in cost, and conducive to promotion. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a schematic diagram of the structure of the limiting component of this utility model;

[0022] Figure 5This is a schematic diagram of the structure of the sieve of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the hinge component of this utility model;

[0024] Figure 7 This is a structural schematic diagram of the connector of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1-machine housing, 2-pressure roller, 3-chain conveyor assembly, 4-cutting roller, 5-limiting component, 6-screen, 7-hinge component, 8-connector component, 9-cylinder, 10-support block;

[0026] 101 - Arc-shaped opening; 301 - Sprocket; 501 - Support shaft; 502 - Fixed disc part; 503 - Protrusion; 601 - Protrusion; 701 - Straight rod part; 702 - Support part; 703 - Through hole; 801 - Notch. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a wood chipper with an anti-jamming mechanism includes a pressure roller 2 disposed inside a housing 1, a chain conveyor assembly 3 disposed below the pressure roller 2, and a cutting roller 4 disposed inside the housing 1 in conjunction with the chain conveyor assembly 3. The wood chipper with the anti-jamming mechanism also includes a screen 6; the screen 6 is disposed below the cutting roller 4; one end of the screen 6 is hinged to the inner wall of the housing 1, and the other end of the screen 6 rests on a limiting mechanism; the limiting mechanism is disposed between the screen 6 and the chain conveyor assembly 3, and is located below the cutting roller 4. When jamming occurs, the limiting mechanism activates, and the screen 6 rotates around its hinge point with the housing 1, expanding the space between the screen 6 and the cutting roller 4, reducing jamming. This design is simple to implement, low in cost, and conducive to widespread adoption.

[0029] In the above settings, such as Figure 3 and Figure 4As shown, the limiting mechanism includes a limiting member 5; the limiting member 5 is coaxially arranged with the sprocket 301 of the chain conveyor assembly 3; the limiting member 5 is located between the inner wall of the housing 1 and the sprocket 301; a support shaft 501 is provided on the limiting member 5; the support shaft 501 passes through the housing 1 and is connected to a support assembly; one end of the support assembly is hinged to the outer wall of the housing 1, and the other end is connected to the outer wall of the housing 1; an arc-shaped opening 101 is provided on the outer wall of the housing 1 to cooperate with the support shaft 501. When material jamming occurs, the pressure on the screen 6 increases, the connection between the support assembly and the outer wall of the housing 1 disengages, the support assembly rotates around it and the outer wall of the housing 1, thereby driving the support shaft 501 to fall and move along the arc-shaped opening 101, the screen 6 rotates around its hinge point with the inner wall of the housing 1, expanding the space between the screen 6 and the cutting roller 4, and reducing material jamming.

[0030] Among them, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the limiting component 5 includes a fixed disk portion 502; a protrusion 503 is provided on the outer peripheral wall of the fixed disk portion 502; one end of the screen 6 is placed on the top surface of the protrusion 503; and a support shaft 501 is disposed on the fixed disk portion 502. The fixed disk portion 502 serves as a base component, providing a stable mounting foundation for the limiting component 5. The protrusion 503 on the outer peripheral wall provides reliable support and positioning for the screen 6, ensuring that one end of the screen 6 can be stably placed on the top surface of the protrusion 503, thus guaranteeing the stability of the screen 6 during operation. Both sides of the bottom surface of the screen 6 (i.e., the bottom surfaces of the screen 6 near the machine housing 1) are provided with protrusions 601; the protrusions 601 are hinged to the inner wall of the machine housing 1 by pins; the end of the screen 6 away from the protrusions 601 is placed on the protrusion 503, and the protrusion is hinged to the inner wall of the machine housing 1 by pins, forming a flexible rotational connection, which allows the screen 6 to swing to a certain extent, thereby facilitating the release of stuck materials. The support assembly includes a hinge 7 and a connector 8; the hinge 7 includes a straight rod 701; a support 702 is fixedly provided on the upper right side of the straight rod 701; the upper part of the straight rod 701 is hinged to the outer wall of the machine housing 1; the support shaft 501 passes through the machine housing 1 and is placed on the support 702; a through hole 703 is provided at the lower part of the straight rod 701; the connector 8 passes through the through hole 703; the connector 8 is connected to the outer wall of the machine housing 1. The connector 8 is bolt-shaped; it passes through the through hole 703 and is threaded to the outer wall of the housing 1. The bolt-shaped design of the connector 8 is standardized and easy to manufacture and install, ensuring its versatility and reducing costs. A notch 801 is provided on the connector 8 from the outer wall inwards. The notch 801 serves as a stress concentration point when the connector 8 is under stress, ensuring its resistance to breakage.

[0031] To facilitate the reset of the limiting mechanism and the screen 6, the wood chipper with an anti-jamming mechanism also includes a reset mechanism; the reset mechanism includes a hydraulic cylinder 9; the cylinder body of the hydraulic cylinder 9 is hinged to the outer wall of the machine housing 1, and the piston rod of the hydraulic cylinder 9 is connected to a support block 10. The support block 10 is generally arranged in a semi-circular ring shape. The semi-circular ring shape has a high degree of compatibility with the shape of the support shaft 501, and can fit well against the surface of the support shaft 501, thereby greatly facilitating the lifting action of the support block 10 on the support shaft 501; at the same time, the semi-circular ring shape design is simple and reasonable, easy to process and manufacture, reduces production costs, and is also more convenient during installation and maintenance. The arc-shaped opening 101 limits the distance the support shaft 501 falls. When the support shaft 501 falls to the lower end of the arc-shaped opening 101, the end of the screen 6 is still in contact with the protrusion 503. During reset, the hydraulic cylinder 9 is activated, and the block 10 at the end of the piston rod moves the support shaft 501 upward along the arc-shaped opening 101 to the upper end of the arc-shaped opening 101. Then, the hinge 7 rotates around its hinge point with the housing 1, and the support part 702 supports the support shaft 501. Then, the connector 8 is inserted into the through hole 703, and the tail end of the connector 8 abuts against the hinge 7. The connector 8 is threaded on the outer wall of the housing 1, completing the reset operation. The hydraulic cylinder 9 is located on the outside of the support assembly.

[0032] In use, the wood is conveyed to the pressure roller 2 by the chain conveyor assembly 3, and the wood chips enter the machine casing 1 under the conveying of the pressure roller 2 and the chain conveyor assembly 3, and are conveyed to the cutting roller 4, where they are chipped between the cutting roller 4 and the limiting member 5.

[0033] When the wood gets stuck between the cutting roller 4 and the limiting member 5, the stuck material exerts pressure on the limiting member 5, pressing it down. The pressure is transmitted through the support shaft 501 to the hinge 7 on the outer wall of the machine housing 1, and further to the connecting member 8. When the pressure exceeds the breaking force of the connecting member 8, it breaks. Then, the hinge 7 rotates around its hinge point with the outer wall of the machine housing 1, and the support part 702 of the hinge 7 rotates and falls, causing the support shaft 501 to move along the arc-shaped opening 1. The screen 6 falls, causing the limiting member 5 to rotate, which in turn causes the end of the screen 6 that contacts the protrusion 503 to fall. This causes the screen 6 to rotate around the hinge point between itself and the inner wall of the housing 1. The support shaft 501 of the limiting member 5 falls to the lower end of the arc-shaped opening 101, and the support shaft 501 abuts against the inner wall of the arc-shaped opening 101. At this time, the screen 6 and the protrusion 503 of the limiting member 5 have not disengaged from each other, which expands the space between the screen 6 and the cutting roller 4 and reduces the phenomenon of material jamming.

[0034] By rationally designing the limiting mechanism, the space between the screen 6 and the cutting roller 4 is significantly expanded. This optimization is of great significance, greatly reducing the occurrence of wood jamming during the operation of the wood chipper. Furthermore, the limiting mechanism is not complex, requiring no sophisticated control system or high material costs; the materials are all common, resulting in relatively low overall costs. This low cost makes this wood chipper with an anti-jamming mechanism highly cost-effective, facilitating its widespread adoption in the wood chipping industry and contributing to improved overall production efficiency.

[0035] In other alternative embodiments, the limiting mechanism includes a base plate fixedly disposed at one end of the screen 6. The base plate is configured in conjunction with the chain conveyor assembly 3 to facilitate the conveying of wood between the base plate and the cutting roller 4 for chipping. The base plate is disposed on both sides of the end of the screen 6; a cylinder is fixedly disposed on the side wall of the base plate, the cylinder penetrating the housing 1, and an arc-shaped groove is provided on the housing 1 to match the cylinder; a bolt is disposed on the outside of the housing, with a radial notch on the outer wall of the bolt, and a support plate is fixedly disposed at the end of the bolt, the support plate being semi-circular; the support plate abuts against the cylinder. When jamming occurs, the jammed wood exerts pressure on the bolt supporting the cylinder. When the pressure is greater than the force that causes the bolt to break, the bolt breaks and detaches from the support of the cylinder. The cylinder moves along the arc-shaped groove to the bottom of the arc-shaped groove, and the screen 6 rotates around the hinge point between it and the inner wall of the housing 1, expanding the space between the screen 6 and the cutting roller 4, thus releasing the jammed wood.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wood chipper with an anti-jamming mechanism, comprising a pressure roller (2) disposed within a housing (1), a chain conveyor assembly (3) disposed below the pressure roller (2), and a cutting roller (4) disposed within the housing (1) in conjunction with the chain conveyor assembly (3), characterized in that, It also includes a screen (6); the screen (6) is set below the cutting roller (4); one end of the screen (6) is hinged to the inner wall of the housing (1), and the other end of the screen (6) is placed on the limiting mechanism; the limiting mechanism is set between the screen (6) and the chain conveyor assembly (3), and is set below the cutting roller (4).

2. The wood chipper with an anti-jamming mechanism according to claim 1, characterized in that, The limiting mechanism includes a limiting component (5); the limiting component (5) is coaxially arranged with the sprocket (301) of the chain conveying assembly (3); the limiting component (5) is arranged between the inner wall of the housing (1) and the sprocket (301); a support shaft (501) is provided on the limiting component (5); the support shaft (501) passes through the housing (1) and is connected to a support assembly; one end of the support assembly is hinged to the outer wall of the housing (1), and the other end is connected to the outer wall of the housing (1); an arc-shaped opening (101) is provided on the outer wall of the housing (1) in coordination with the support shaft (501).

3. The wood chipper with an anti-jamming mechanism according to claim 2, characterized in that, The limiting component (5) includes a fixed plate part (502); a protrusion (503) is provided on the outer peripheral wall of the fixed plate part (502); one end of the screen (6) is placed on the top surface of the protrusion (503); and the support shaft (501) is provided on the fixed plate part (502).

4. The wood chipper with an anti-jamming mechanism according to claim 3, characterized in that, The bottom surface of the screen (6) is provided with protrusions (601) on both sides; the protrusions (601) are hinged to the inner wall of the housing (1) by a pin; the end of the screen (6) away from the protrusions (601) is placed on the protrusion (503).

5. The wood chipper with an anti-jamming mechanism according to claim 4, characterized in that, The support assembly includes a hinge (7) and a connector (8); the hinge (7) includes a straight rod (701); a support (702) is fixedly provided on the upper right side of the straight rod (701); the upper part of the straight rod (701) is hinged to the outer wall of the housing (1); the support shaft (501) passes through the housing (1) and is placed on the support (702); a through hole (703) is provided at the lower part of the straight rod (701); the connector (8) passes through the through hole (703); the connector (8) is connected to the outer wall of the housing (1).

6. The wood chipper with an anti-jamming mechanism according to claim 5, characterized in that, The connector (8) is bolt-shaped; the connector (8) is threaded to the outer wall of the housing (1) after passing through the through hole (703).

7. The wood chipper with an anti-jamming mechanism according to claim 6, characterized in that, The connector (8) has a notch (801) extending from the outer wall inward.

8. The wood chipper with an anti-jamming mechanism according to claim 6, characterized in that, The wood chipper with anti-jamming mechanism also includes a reset mechanism; the reset mechanism includes a hydraulic cylinder (9); the cylinder body of the hydraulic cylinder (9) is hinged to the outer wall of the machine housing (1), and the piston rod of the hydraulic cylinder (9) is connected to a support block (10).

9. The wood chipper with an anti-jamming mechanism according to claim 8, characterized in that, The support block (10) is set in a semi-circular ring shape.

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