Hydraulically driven feed brush chipper

Abstract

This utility model relates to the field of wood chipper technology, specifically to a hydraulically driven feeding wood chipper. The wood chipper body is equipped with a transmission assembly and a hydraulic feeding assembly. The transmission assembly includes a first pulley, a second pulley, and a hydraulic pump assembly. The hydraulic pump assembly includes a hydraulic pump and pulleys. The hydraulic pump's inlet pipe is connected to an oil tank assembly, and the hydraulic pump's output oil circuit is connected to the hydraulic motor's inlet via a solenoid directional valve. When the cutting shaft speed decreases, the feeding speed is reduced to prevent the crushing disc from getting stuck. Simultaneously, a speed detection controller is installed on the wood chipper body to detect the cutting shaft speed. When the cutting shaft speed is lower than a set value, the speed detection controller stops the hydraulic motor and stops feeding, minimizing the risk of the crushing disc getting stuck.

Description

Technical Field

[0001] This invention relates to the field of wood chipper technology, and more specifically to a hydraulically driven wood chipper. Background Technology

[0002] In the existing technology, wood chippers are divided into free feeding and forced feeding according to different feeding methods. Generally, forced feeding can make the wood chips after breaking more uniform in size. Hydraulic transmission forced feeding is a commonly used driving method.

[0003] Chinese Patent CN213222650U discloses a feeding system for a wood chipper, including a wood chipper body, a feeding cylinder and a discharging cylinder disposed on the wood chipper body. The feeding cylinder is equipped with rollers, and support parts are disposed on both sides of the rollers. Connecting plates are sleeved on the two support parts, and the other end of the connecting plates is rotatably disposed on the wood chipper body. The connecting plates are formed with protrusions, and tension springs are connected to the protrusions. The lower end of the tension springs is fixed to the wood chipper body. The support parts are slidably disposed in annular grooves opened on both sides of the feeding cylinder, providing a stable hydraulic feeding system.

[0004] However, the above technical solution has the following shortcomings: a separate power pump is set up to provide kinetic energy for the hydraulic feeding component, and the feeding speed of the power pump is manually controlled by the speed adjustment handle, so the feeding speed cannot be adjusted at any time according to the breaking of the wood. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a hydraulically driven feeding shredder, including a shredder body and a chassis. An engine and an oil tank assembly are fixedly installed on the chassis, and an electromagnetic reversing valve is fixedly installed on the oil tank assembly. The shredder body includes a cutter box and a feed inlet.

[0006] The main body of the wood chipper is equipped with a transmission assembly and a hydraulic feeding assembly.

[0007] The transmission assembly includes a first pulley, a second pulley, and a hydraulic pump assembly rotatably mounted on the body of the wood chipper. The first pulley is connected to the output shaft of the engine via a V-belt drive. A cutting shaft is rotatably mounted inside the cutter box, and the two ends of the cutting shaft are coaxially connected to the first pulley and the second pulley, respectively. The hydraulic pump assembly includes a hydraulic pump and a pulley. The second pulley is connected to the pulley of the hydraulic pump assembly via a V-belt drive. The output oil circuit of the hydraulic pump is connected to the oil inlet of the hydraulic motor via a solenoid directional valve.

[0008] The hydraulic feeding assembly includes a feeding roller, which is rotatably mounted inside the shredder body; one end of the feeding roller is connected to the output shaft of the hydraulic motor via a coupling.

[0009] Furthermore, the hydraulic feeding assembly also includes a chute, which is located on both sides of the shredder body. A baffle is slidably installed on the outer side of the chute, and a swing arm is fixedly installed on the side of the baffle away from the chute. The other end of the swing arm away from the baffle is rotatably installed on the shredder body. A return spring is fixedly installed at the lower end of the swing arm, and the other end of the return spring is fixedly installed on the shredder body. The two ends of the feeding roller pass through the chute, the through hole of the baffle, and the through hole on the swing arm in sequence, and are connected to the bearing seat. The bearing seat is fixedly installed on the swing arm. The hydraulic motor is fixedly installed on the swing arm through a fixed bracket.

[0010] Furthermore, a speed detection controller is fixedly installed on the main body of the shredder, and a proximity sensor is fixedly installed on the outer wall of the blade box near the cutting blade shaft via a bracket. Screws are installed at the positions corresponding to the proximity sensor on the cutting blade shaft. The speed detection controller is electrically connected to the proximity sensor and the solenoid reversing valve.

[0011] Furthermore, a crushing disc is installed on the cutting blade shaft, and bearing seats are installed at both ends of the cutting blade shaft, with the bearing seats fixedly installed on the blade box wall.

[0012] Furthermore, a limiting plate is fixedly installed on the body of the wood chipper, and a buffer pad is fixedly installed at the position where the swing arm contacts the limiting plate.

[0013] Furthermore, connecting handles are fixedly installed at the upper ends of the two swing arms.

[0014] Furthermore, the feed roller has several serrated pressure strips distributed around its circumference.

[0015] Furthermore, a tensioning wheel is rotatably mounted on the body of the wood chipper, and the tensioning wheel elastically abuts against the transmission V-belt between the hydraulic pump assembly and the second pulley.

[0016] Furthermore, the shredder body also includes a discharge port, on which a discharge guide plate is rotatably mounted.

[0017] Furthermore, the shredder body also includes an upper cover, the upper part of which is mounted on the shredder body via a hinge, and the lower part of which is connected to the shredder body via bolts.

[0018] Compared with existing technologies, the significant advantages of this invention are:

[0019] Firstly, during the wood crushing process, if the wood is not crushed smoothly, the speed of the cutting blade shaft will decrease. Under the transmission of the pulley and the hydraulic pump assembly, the speed of the hydraulic pump will decrease, thereby reducing the speed of the hydraulic motor and the feed rate. This allows the feed rate to be adjusted in real time according to the wood crushing situation, reducing the risk of the crushing disc getting stuck.

[0020] Secondly, the speed detection controller can control the solenoid directional valve to operate when the speed of the pulley is lower than the set value. This stops the hydraulic pump from outputting power to the hydraulic motor and directly connects to the oil tank assembly. In other words, when the speed of the cutting shaft decreases to a certain level and the risk of the crusher getting stuck increases, the speed detection controller controls the hydraulic pump assembly to stop supplying power to the hydraulic motor through the solenoid directional valve. This stops the feed roller from rotating and stops feeding until the speed of the cutting shaft returns to normal. Then, the speed detection controller controls the solenoid directional valve to operate, allowing the hydraulic pump assembly to resume supplying power to the hydraulic motor and restoring normal feeding, thus minimizing the probability of the crusher getting stuck. Attached Figure Description

[0021] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a structural schematic diagram of one side of this utility model;

[0023] Figure 2 This is a structural schematic diagram of another aspect of this utility model;

[0024] Figure 3 This is an exploded view of the hydraulic feeding assembly of this utility model;

[0025] Figure 4 This is a cross-sectional view of the blade box part of this utility model;

[0026] In the diagram: 1. Engine; 2. Tool box; 3. Oil tank assembly; 4. Belt pulley one; 5. Feed inlet; 6. Connecting handle; 7. Discharge outlet; 8. Discharge guide plate; 9. Swing arm; 10. Top cover; 11. Limit plate; 12. Bearing seat; 13. Return spring; 14. Belt pulley two; 15. Hydraulic pump assembly; 16. Tensioner wheel; 17. Speed ​​detection controller; 18. Chassis; 19. Hydraulic motor; 20. Feed roller; 21. Slide groove; 22. Baffle; 23. Coupling; 24. Buffer pad; 25. Proximity sensor; 26. Screw; 27. Cutting blade shaft; 28. Solenoid directional valve. Detailed Implementation

[0027] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0028] like Figures 1 to 4As shown, this utility model proposes a hydraulically driven feeding shredder, including a shredder body and a chassis 18. An engine 1 and an oil tank assembly 3 are fixedly installed on the chassis 18. An electromagnetic reversing valve 28 is fixedly installed on the oil tank assembly 3. The electromagnetic reversing valve 28 is a two-position three-way electromagnetic reversing valve. The shredder body includes a blade box 2, a feed port 5, an upper cover 10, and a discharge port 7. A discharge guide plate 8 is rotatably installed on the discharge port 7. When using the shredder, the installation angle between the discharge guide plate 8 and the discharge port 7 can be adjusted as needed to control the discharge direction. The upper part of the upper cover 10 is rotatably installed on the shredder body by a hinge, and the lower part of the upper cover 10 is connected to the shredder body by bolts. After removing the lower bolts, the upper cover 10 can be rotated open for easy maintenance of the shredder's interior.

[0029] The main body of the wood chipper is equipped with a transmission assembly and a hydraulic feeding assembly.

[0030] The transmission assembly includes a pulley 4, which is mounted on the outside of the cutter box 2. The pulley 4 is connected to the output shaft of the engine 1 via a V-belt drive. A cutting shaft 27 is rotatably mounted inside the cutter box 2. A crushing disc is mounted on the cutting shaft 27. Bearing seats 12 are mounted on both ends of the cutting shaft 27. The bearing seats 12 are fixedly mounted on the wall of the cutter box 2. One end of the cutting shaft 27 is fixedly connected to the pulley 4, and the other end of the cutting shaft 27 is connected to the pulley 14. That is, the pulley 4, the cutting shaft 27, and the pulley 14 are coaxially connected. The pulley 4 and the pulley 14 are rotatably mounted on the outside of the cutter box 2.

[0031] On the outer wall of the tool box 2, on the same side as the second pulley 14, the hydraulic pump assembly 15 and the tensioning pulley 16 are rotatably mounted. The hydraulic pump assembly 15 includes a hydraulic pump and a pulley. The pulley of the hydraulic pump assembly 15 is connected to the second pulley 14 via a V-belt. The tensioning pulley 16 elastically resists the V-belt between the hydraulic pump assembly 15 and the second pulley 14. The tension of the V-belt between the hydraulic pump assembly 15 and the second pulley 14 can be adjusted by adjusting the position of the tensioning pulley 16.

[0032] The hydraulic pump draws oil from the oil tank assembly 3. The output oil circuit of the hydraulic pump is connected to the input end of the solenoid directional valve 28. The output end of the solenoid directional valve 28 is connected to the oil tank assembly 3 and the oil inlet of the hydraulic motor 19 respectively. The oil outlet circuit of the hydraulic motor 19 is connected to the oil tank assembly 3.

[0033] The hydraulic feeding assembly includes a feeding roller 20, which is rotatably installed inside the body of the wood chipper. Several serrated pressure strips are distributed around the circumference of the feeding roller 20. The upper two sides of the blade box 2 have sliding grooves 21. A baffle 22 is slidably installed on the outside of the sliding grooves 21. The size of the baffle 22 is larger than that of the sliding grooves 21. The baffle 22 can prevent wood chips from flying out from the position of the sliding grooves 21. A swing arm 9 is fixedly installed on the side of the baffle 22 away from the sliding grooves 21. A return spring 13 is fixedly installed at the lower end of the swing arm 9. The other end of the return spring 13 is fixedly installed on the body of the wood chipper. The other end of the swing arm 9 away from the baffle 22 is rotatably mounted on the body of the shredder; the upper ends of the two swing arms 9 are fixedly mounted with connecting handles 6, which enable the swing arms 9 on both sides to rotate synchronously; the two ends of the feed roller 20 pass through the slide groove 21, the through hole of the baffle 22, and the through hole on the swing arm 9 respectively, and are connected to the bearing seat 12, which is fixedly mounted on the swing arm 9; one side of the feed roller 20 passes through the bearing seat 12 and is connected to the hydraulic motor 19 through the coupling 23, which is fixedly mounted on the swing arm 9 through the fixed bracket.

[0034] To prevent the hydraulic feeding assembly from rotating too far downwards, a limiting plate 11 is fixedly installed on the body of the shredder. At the same time, a buffer pad 24 is fixedly installed at the position where the swing arm 9 contacts the limiting plate 11. This reduces the friction of the shredder itself when the swing arm 9 rotates to the lowest position, and also prevents excessive noise.

[0035] When the wood chipper is working, the wood to be crushed enters through the feed inlet 5. As the hydraulic motor 19 drives the feed roller 20 to rotate, the serrated pressure strip on the feed roller 20 presses down on the wood and forces it into the cutter box 2. When wood of different diameters is fed into the feed inlet 5, the feed roller 20 drives the baffle 22 and the swing arm 9 to rotate at different angles. At the same time, under the downward pull of the return spring 13, the hydraulic feeding assembly adapts to wood of different diameters. After the branches fed into the feed inlet 5 enter the cutter box 2, the hydraulic assembly can be restored and press down on the subsequent wood. If, during the wood crushing process, the wood is not crushed smoothly due to the hardness of the wood or other reasons, the speed of the cutting blade shaft 27 decreases. Under the transmission of the pulley 14 and the hydraulic pump assembly 15, the speed of the hydraulic pump decreases, thereby reducing the speed of the hydraulic motor 19 and the feed amount. This reduces the risk of the crushing disc getting stuck.

[0036] To further reduce the risk of the shredder disc getting stuck, a speed detection controller 17 is also fixedly installed on the shredder body. A proximity sensor 25 is fixedly installed on the outer wall of the blade box 2 near the cutting shaft 27 via a bracket. A screw 26 is installed at one end of the cutting shaft 27 corresponding to the proximity sensor 25. The speed detection controller 17 is electrically connected to the proximity sensor 25 and the solenoid directional valve 28. The speed detection controller 17 can detect the approach frequency of the screw 26 through the proximity sensor 25 and display the speed of the cutting shaft 27. Furthermore, when the speed of the cutting shaft 27 is less than a set value, the speed detection controller 17 can control the solenoid directional valve 28 to operate. The hydraulic pump assembly 15 stops supplying power to the hydraulic motor 19 via its hydraulic pump output circuit, directly connecting to the oil tank assembly 3. This means that when the cutting shaft 27's speed decreases to a certain level, increasing the risk of the crushing disc getting stuck, the speed detection controller 17 controls the hydraulic pump assembly 15 to stop supplying power to the hydraulic motor 19 via the solenoid directional valve 28. This stops the feed roller 20 from rotating and stops feeding until the cutting shaft 27's speed returns to normal. Then, the speed detection controller 17 controls the solenoid directional valve 28 to switch its output, allowing the hydraulic pump assembly 15 to continue supplying power to the hydraulic motor 19, restoring normal feeding and minimizing the probability of the crusher blade getting stuck.

[0037] The working principle of the specific implementation is as follows: When the engine 1 is turned on, the V-belt drives pulley 4, the cutting shaft 27, and pulley 14 to rotate. Similarly, the hydraulic pump assembly 15 rotates via the V-belt drive. The input end of the hydraulic pump draws oil from the oil tank assembly 3, and the output end of the hydraulic pump connects to the hydraulic motor 19 via the solenoid directional valve 28, causing the hydraulic motor 19 to rotate. This drives the feed roller 20 to rotate, allowing the wood to be fed normally through the feed inlet 5, and the wood chipper operates normally. If the speed of the cutting shaft 27 decreases, that is, the speed of pulley 14 decreases, the speed of the hydraulic pump assembly 15 decreases due to the V-belt drive, reducing the power transmitted through the hydraulic circuit. When the speed of the hydraulic motor 19 decreases, the speed of the feed roller 20 also decreases, resulting in less material feeding and reducing the load on the cutting shaft 27. If the speed of the cutting shaft 27 decreases to a certain level, the speed detection controller 17 controls the hydraulic pump assembly 15 via the solenoid directional valve 28, causing the hydraulic pump assembly 15 to stop supplying power to the hydraulic motor 19. This stops the hydraulic motor 19 from rotating, the feed roller 20 from rotating, and the feeding stops. Until the speed of the cutting shaft 27 returns to normal, the speed detection controller 17 controls the solenoid directional valve 28 to allow the hydraulic pump assembly 15 to continue supplying power to the hydraulic motor 19, causing the hydraulic motor 19 to rotate normally and the feed roller 20 to rotate normally, thus restoring normal feeding.

[0038] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A hydraulically driven feeding shredder, comprising a shredder body and a chassis (18), wherein an engine (1) and an oil tank assembly (3) are fixedly mounted on the chassis (18), and an electromagnetic reversing valve (28) is fixedly mounted on the oil tank assembly (3); the shredder body includes a cutter box (2) and a feed inlet (5); Its features are: The main body of the wood chipper is equipped with a transmission assembly and a hydraulic feeding assembly; The transmission assembly includes a pulley 1 (4), a pulley 2 (14), and a hydraulic pump assembly (15) rotatably mounted on the body of the wood chipper. The pulley 1 (4) is connected to the output shaft of the engine (1) via a V-belt drive. The cutting blade shaft (27) is rotatably mounted in the blade box (2). The two ends of the cutting blade shaft (27) are coaxially connected to the pulley 1 (4) and the pulley 2 (14) respectively. The hydraulic pump assembly (15) includes a hydraulic pump and a pulley. The pulley 2 (14) is connected to the pulley of the hydraulic pump assembly (15) via a V-belt drive. The output oil circuit of the hydraulic pump is connected to the oil inlet of the hydraulic motor (19) via an electromagnetic reversing valve (28). The hydraulic feeding assembly includes a feed roller (20), which is rotatably mounted in the body of the shredder; one end of the feed roller (20) is connected to the output shaft of the hydraulic motor (19) via a coupling (23).

2. The hydraulically driven feeding shredder according to claim 1, characterized in that: The hydraulic feeding assembly also includes a chute (21), which is located on both sides of the shredder body. A baffle (22) is slidably installed on the outside of the chute (21). A swing arm (9) is fixedly installed on the side of the baffle (22) away from the chute (21). The other end of the swing arm (9) away from the baffle (22) is rotatably installed on the shredder body. A return spring (13) is fixedly installed at the lower end of the swing arm (9). The other end of the return spring (13) is fixedly installed on the shredder body. The two ends of the feed roller (20) pass through the through holes of the chute (21), the baffle (22), and the swing arm (9) respectively, and are connected to the bearing seat (12). The bearing seat (12) is fixedly installed on the swing arm (9). The hydraulic motor (19) is fixedly installed on the swing arm (9) through a fixed bracket.

3. A hydraulically driven feeding shredder according to claim 2, characterized in that: A speed detection controller (17) is fixedly installed on the main body of the shredder. A proximity sensor (25) is fixedly installed on the outer wall of the blade box (2) near the cutting blade shaft (27) by a bracket. Screws (26) are installed at the corresponding positions of the cutting blade shaft (27) and the proximity sensor (25). The speed detection controller (17) is electrically connected to the proximity sensor (25) and the solenoid reversing valve (28).

4. A hydraulically driven feeding shredder according to claim 3, characterized in that: A crushing disc is installed on the cutting shaft (27), and bearing seats (12) are installed at both ends of the cutting shaft (27). The bearing seats (12) are fixedly installed on the wall of the blade box (2).

5. A hydraulically driven feeding shredder according to claim 4, characterized in that: A limiting plate (11) is fixedly installed on the body of the wood chipper, and a buffer pad (24) is fixedly installed at the position where the swing arm (9) contacts the limiting plate (11).

6. A hydraulically driven feeding shredder according to claim 4, characterized in that: The upper ends of the two swing arms (9) are fixedly connected to the handles (6).

7. A hydraulically driven feeding shredder according to claim 4, characterized in that: Several serrated pressure strips are distributed around the circumference of the feed roller (20).

8. A hydraulically driven feeding shredder according to claim 4, characterized in that: A tensioning wheel (16) is rotatably installed on the body of the shredder. The transmission V-belt between the tensioning wheel (16), the hydraulic pump assembly (15), and the second pulley (14) is elastically resisted.

9. A hydraulically driven feeding shredder according to claim 1, characterized in that: The main body of the shredder also includes a discharge port (7), on which a discharge guide plate (8) is rotatably installed.

10. A hydraulically driven feeder for chipping branches according to claim 1, characterized in that: The shredder body also includes an upper cover (10), the upper part of which is mounted on the shredder body by means of a hinge, and the lower part of which is connected to the shredder body by means of bolts.

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