Under-forest combustible material crushing working head

Abstract

The utility model discloses an under-forest combustible material smashing working head which comprises a main frame, a smashing roller device, an upper dead knife, a screen and a feeding device. The main frame comprises a left side plate, a right side plate, an upper dead knife fixing seat and a dustproof plate, the dustproof plate is mounted between the rear portions of the left side plate and the right side plate, the screen is mounted in front of the dustproof plate, the screen lower positioning plate is mounted below the screen, and a discharging space is formed among the screen, the dustproof plate, the left side plate and the right side plate. The upper dead knife fixing seat is fixed between the left side plate and the right side plate in front of the upper part, and the upper dead knife is mounted on the upper dead knife fixing seat; the crushing roller device comprises a driving device and a crushing roller connected with the driving device, the upper dead knife and the screen are correspondingly matched with cutter teeth of the crushing roller, and the left end and the right end of the crushing roller are the same in structure and can be used left and right after being detached; the feeding device comprises a feeding frame and a feeding roller, and the feeding roller is installed on the feeding frame and matched with the smashing roller.

Description

Technical Field

[0001] The utility model relates to an understory combustible material crushing working head, which is assembled on a hydraulic crawler working vehicle and is applied to the fields of forest fire prevention and forest tending. Background Art

[0002] In the field of forest fire prevention, it is common to use hydraulic crawler vehicles with special working heads to open firebreaks. Similarly, in the field of forest fire prevention and forest tending, there is no dedicated and efficient equipment for crushing combustibles under the forest. Existing combustibles under the forest need to be manually transported to the crusher, and then crushed by manual loading; or the crawler-type walking crusher is moved to the vicinity of the combustibles, and then crushed by manual loading. Utility Model Content

[0003] In view of the above, the purpose of the utility model is to provide a forest understory combustible material crushing working head, which does not require manual loading. Instead, when the hydraulic crawler work vehicle moves in an area with forest understory combustible materials, the working head picks up and crushes the forest understory combustible materials, eliminating the need for manual handling and loading, greatly reducing labor intensity and improving work efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A forest understory combustible material crushing working head, comprising a main frame, a crushing roller device, an upper bottom knife, a screen and a feeding device;

[0006] The main frame includes a left side plate, a right side plate and an upper bottom knife fixing seat, a screen is provided between the left and right side plates, the upper bottom knife fixing seat is fixed between the left and right side plates at the front of the upper part, and the upper bottom knife is installed on the upper bottom knife fixing seat;

[0007] The crushing roller device comprises a driving device and a crushing roller connected to the driving device. The crushing roller rotates upward when viewed from the front. The upper bottom knife and the screen mesh are matched with the teeth of the crushing roller.

[0008] The feeding device is installed at the front lower part of the crushing roller device, and the feeding device includes a feeding frame and a feeding roller. The feeding roller is installed on the feeding frame, and the feeding roller cooperates with the crushing roller to transport the combustibles under the forest, and crushes them through the upper bottom knife and the screen.

[0009] The feeding roller can be a rear-toothed feeding roller, which rotates downward when viewed from the front. The feeding roller rotates in the opposite direction to the crushing roller, first pushing the combustibles under the forest to the rear, rotating and carrying them up, and transporting them in cooperation with the crushing roller, and then crushing them through the upper bottom knife and the screen.

[0010] The feeding roller can be a front-toothed feeding roller, which is close to the ground and rotates upward when viewed from the front. The feeding roller rotates in the same direction as the crushing roller, first picking up the combustible materials under the forest and rotating them up, and then transporting them through the crushing roller, and crushing them through the upper bottom knife and the screen; the rake angle a of the front cutting edge of the teeth of the front-toothed feeding roller is 0 degrees to 60 degrees.

[0011] The feeding frame is detachably connected or hinged to the main frame. When hinged, the feeding frame is connected to the lifting device.

[0012] The left and right ends of the crushing roller have the same structure. The feeding roller is lifted or removed. The crushing roller is removed and then switched to the left and right ends for use. The crushing roller rotates forward, and the crushing working head performs the operation of opening a fire isolation zone.

[0013] A dustproof plate is installed between the rear parts of the left and right plates, and the dustproof plate is located behind the screen. A positioning plate under the screen is installed below the screen, and a discharge space is formed between the screen and the dustproof plate as well as the left and right side plates.

[0014] The inner wall of the dustproof plate is provided with several support plates spaced laterally, the screen is located in front of the support plate, the positioning plate under the screen is a lower bottom knife fixing seat, the lower bottom knife is installed on the lower bottom knife fixing seat, the lower parts of the left plate and the right plate are provided with open grooves, and the crushing roller is installed on the open groove; guide columns are respectively inserted in the notches on the upper and lower parts of the support plate, and a side opening for the screen to slide into is provided on the right plate, and the screen slides into the gap between the screen positioning plate of the left plate and the leftmost support plate along the guide column and the upper and lower bottom knife fixing seats, and a screen sealing plate is connected to the position of the right plate corresponding to the screen, and the lower part of the discharge space is open and gradually expands from top to bottom;

[0015] The lower part of the upper bottom knife fixing seat is used to support the upper end of the screen and is located in front of the upper part of the dustproof plate. The upper bottom knife fixing seat and the lower bottom knife jointly position the upper and lower ends of the screen. The upper bottom knife adopts a square structure and has threaded mounting holes on all four sides so that the four edges of the upper bottom knife can be used. The lower bottom knife fixing seat is located in front of the lower part of the dustproof plate.

[0016] The driving device includes a hydraulic motor and a pulley structure. The hydraulic motor is installed on the left side plate. The hydraulic motor drives the active pulley connected to the pulley structure. The crushing roller includes a roller, knife teeth, a driven pulley and a flange shaft. Two groups of driven pulleys are symmetrically distributed on both sides of the crushing roller. The driven pulley is connected to the flange shaft, and the flange shaft is connected to the flange plate on the inner side of the roller by bolts.

[0017] The lifting device is a hydraulic cylinder, and the feeding roller is connected to the feeding motor drive. The feeding roller is installed at the front of the feeding frame. The rear ends of the feeding frame are hinged between the left and right side plates and are located above the dustproof plate. One end of the hydraulic cylinder is installed at the rear top of the feeding frame, and the other end of the hydraulic cylinder is installed at the rear top of the main frame. The feeding roller can be lifted around the hinge shaft under the action of the lifting device.

[0018] The oil inlet and outlet ports of the hydraulic cylinder are connected to the multi-way valve control of the main machine. The multi-way valve has a stop position and a floating position. When the multi-way valve is in the floating position, the feeding roller can rise and fall according to the load. When the multi-way valve is in the stop position, the hydraulic cylinder is locked and the feeding roller is in a desired position.

[0019] The beneficial effects of the utility model are as follows: the working head is driven by a hydraulic crawler working vehicle, wherein the crushing roller is driven by a hydraulic motor via a belt. The crushing roller is fixedly provided with crushing teeth, which are directional. When viewed from the front, the blade of the teeth is upward, and the crushing roller rotates upward at the same time. The feeding roller picks up and feeds the combustibles under the forest, and crushes them through the teeth, the upper bottom knife and the screen. The left and right sides of the crushing roller have the same installation structure, and can be swapped for use after disassembly. When the blade of the teeth is downward and the crushing roller rotates downward, the crushing working head performs the operation of opening a fireproof isolation zone. The working head is provided with a feeding device, which is required when performing the operation of crushing combustibles under the forest. When performing the operation of opening a fireproof isolation zone, the feeding device must be lifted or removed. The high efficiency of the operation of crushing combustibles under the forest is achieved, and one machine is used for two purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model installed on a hydraulic crawler work vehicle;

[0021] Figure 1A for Figure 1 A schematic diagram of the structure from another perspective;

[0022] Figure 1B A schematic diagram showing the structure of the crushing mechanism;

[0023] Figure 2 It is a side view structural schematic diagram of the utility model in the open belt state;

[0024] Figure 3 It is a side view structural schematic diagram of the utility model in a crushing state;

[0025] Figure 4A It is a three-dimensional structural schematic diagram of the pulley structure and the bidirectional auxiliary tensioning structure.

[0026] Figure 4B It is a schematic diagram of the structure of the hydraulic motor and the main belt tensioning structure of the driving device.

[0027] Figure 5 A schematic diagram of the structure of the main frame;

[0028] Figure 5A It is a structural schematic diagram of the crushing mechanism from another perspective;

[0029] Figure 6 It is a schematic diagram of the structure of the driving device of the crushing roller;

[0030] Fig. 6A A schematic diagram of the side view of the crushing roller with crushing teeth installed;

[0031] Figure 7 Schematic diagram of the decomposed structure of the feeding mechanism.

[0032] Figure 8 It is a structural schematic diagram of the side shift mechanism.

[0033] Fig. 8A It is a structural schematic diagram of the side shift mechanism from another perspective.

[0034] Fig. 9 It is a structural schematic diagram of another implementation mode of the utility model.

[0035] Fig.10 for Fig. 9 Schematic diagram of the side structure.

[0036] Fig.11A This is a schematic diagram of the structure in which the feeding roller is installed on the feeding frame.

[0037] Fig. 11B It is a schematic diagram of the three-dimensional structure of the feeding rack.

[0038] Fig. 12A for Fig.11A A schematic diagram of the structure from another perspective.

[0039] Fig. 12B for Fig. 11B A schematic diagram of the structure from another perspective.

[0040] Fig.13A It is a structural schematic diagram of the front cutting edge inclination angle a of the front gear feeding roller.

[0041] Fig. 13B It is a schematic diagram of the structure when a of the front gear feeding roller is 0 degrees.

[0042] Fig. 13C It is a schematic diagram of the structure when the a of the front gear feeding roller is 60 degrees. DETAILED DESCRIPTION

[0043] like Figures 1 to 8AAs shown, the utility model relates to a first preferred embodiment of a forest understory combustible material crushing work head, comprising a crushing roller device 1, a main frame 2, an upper bottom knife 3, a screen 4 and a feeding device 5. The main frame 2 comprises a left side plate 21, a right side plate 22, an upper bottom knife fixing seat 23 and a dustproof plate 24. The dustproof plate 24 is installed between the rear parts of the left side plate 21 and the right side plate 22, the screen 4 is installed in front of the dustproof plate 24, and a screen lower positioning plate is installed below the screen 4. A discharge space is formed between the screen 4 and the dustproof plate 24 as well as the left and right side plates. The upper bottom knife fixing seat 23 is fixed between the left and right side plates at the front of the upper part, and the upper bottom knife 3 is installed on the upper bottom knife fixing seat 23;

[0044] The crushing roller device 1 includes a driving device 11 and a crushing roller 12 connected to the driving device. The upper bottom knife 3 and the screen 4 correspond to the blade teeth 121 of the crushing roller. A plurality of the blade teeth are spirally installed on a roller 122 of the crushing roller 12. Preferably, the left and right ends of the crushing roller have the same structure and can be switched for use after disassembly to perform different operation modes.

[0045] The feeding device 5 includes a feeding frame 51 and a feeding roller 52, and may also include a lifting device. The feeding roller 52 is installed on the feeding frame 51. When the lifting device is not included, the feeding frame can be detachably connected to the main frame 2; when the lifting device is included, the lifting device is connected to the feeding frame.

[0046] The feeding roller cooperates with the crushing roller; the teeth of the feeding roller are rear teeth, which can pick up combustibles from the rear and upward when the feeding roller rotates. When the feeding roller rotates downward from the front and in the opposite direction to the crushing roller, the material is driven by the rear teeth to the rear of the feeding roller and cooperate with the crushing roller to pick up the combustibles under the forest, and then pass through the upper bottom knife and screen for crushing. That is, when the crushing roller is installed with the teeth facing upward, the crushing roller rotates upward, and the feeding roller rotates in the opposite direction to the teeth and is located in front of the teeth to cooperate to pick up the combustibles under the forest, and then pass through the upper bottom knife and screen for crushing;

[0047] Seen from the front, when the crushing roller is switched left and right and installed with the blade facing downward, the crushing roller rotates downward, the feeding roller is lifted or removed, and the crushing working head performs the operation of opening a fire isolation zone.

[0048] Preferably, a chain is connected to the lower part of the dustproof plate 24 to prevent debris from flying backward. The inner wall of the dustproof plate 24 is provided with a plurality of support plates 25 spaced laterally apart, the screen 4 is located in front of the support plates 25, the positioning plate under the screen is the lower bottom knife fixing seat 7, and the lower bottom knife 7a is installed on the lower bottom knife fixing seat. The support frame 139 is installed at the bottom of the left and right side plates, and the support frame 139 can be adjusted in height, thereby adjusting the clearance of the cutter head from the ground. The lower parts of the left and right plates are both provided with open grooves, and the crushing roller 12 is installed on the open grooves; guide columns 251 are respectively inserted into the grooves at the upper and lower parts of the support plate 25, and a side opening 22b for the screen to slide into is provided on the right plate. The screen slides along the guide columns and the upper and lower knife fixing seats into the gap between the screen positioning plate 148a of the left plate and the leftmost support plate, and a threaded through hole is provided on the left plate at the corresponding gap, through which the screen can be pushed out, and a screen sealing plate 41 is connected to the position of the right plate corresponding to the screen, and below the discharge space It is open and gradually expands from top to bottom; the lower part of the upper bottom knife fixing seat 23 is used to support the upper end of the screen and is located in front of the upper part of the dustproof plate 24. The upper bottom knife fixing seat 23 and the lower bottom knife 7A jointly locate the upper and lower ends of the screen to prevent the screen from moving toward the crushing roller. The upper bottom knife 3 adopts a square structure. In the length direction, there are threaded holes equidistantly on the upper and lower sides and the front and rear sides. The upper and lower threaded holes and the front and rear threaded holes are staggered left and right. The bottom knife can be turned over or swapped left and right. The four blades of the bottom knife can be effectively used to increase the service life. The lower bottom knife fixing seat is located in front of the lower part of the dustproof plate. The distance between the screen and the dustproof plate is greater than the maximum aperture of the screen mesh. In addition, the upper bottom knife 3 is located at one end of the right side plate 22, extending out of the right side plate and pressing on the Z-shaped seat 22c of the right side plate.

[0049] Specifically, Figure 5 and Figure 5A As shown, the lower part of the left side plate 21 is provided with a left open groove 21a in the front-to-back direction, and the lower part of the right side plate 22 is provided with a corresponding right open groove 22a, and the two ends of the crushing roller are installed in the corresponding open grooves; the upper half of the left side plate is bent backward relative to the lower half, and the driving device includes a hydraulic motor and a pulley structure. The hydraulic motor is installed on the inner upper part of the left side plate, and the hydraulic motor drives the active pulley connected to the pulley structure. The pulley structure is installed on the outer side of the left side plate, and the hydraulic motor 13 is connected to the crushing roller 12 through the pulley structure; the crushing roller includes a roller, a knife tooth, a driven pulley and a flange shaft, and two groups of driven pulleys 12a are symmetrically distributed on both side ends of the crushing roller 12, and the driven pulley 12a is connected to the flange shaft 12b, and the flange shaft 12b is connected to the flange plate on the inner side of the roller 122 by bolts 12c.

[0050] The belt main tensioning structure 1321 is installed at the left side plate position corresponding to the hydraulic motor. Figure 4BAs shown, the main belt tensioning structure 1321 includes a rotating plate 132a, the hydraulic motor 13 is fixed on the rotating plate and the left side plate, one end of the rotating plate 132a is hinged on the left side plate, and the other end of the rotating plate is provided with a long strip slide groove 132b, and a guide bolt 132c is installed on the left side plate, and the guide bolt passes through the long strip slide groove 132b, and a positioning stud 132d is installed on the rotating plate near the upper end of the long strip slide groove. The positioning stud is provided with a movable bolt, and the other end of the movable bolt passes through the fixed plate 132e and is positioned by the nuts 132f on both sides thereof. The swing angle of the rotating plate is adjusted by the nuts on both sides of the fixed plate, thereby adjusting the tightness of the belt, and the disassembly and assembly and tension of the belt are realized through the main tensioning structure.

[0051] like Figure 4A As shown, a two-way auxiliary tensioning structure is installed in the belt loop of the outer wall of the left side plate, and the two-way auxiliary tensioning structure includes an upper tensioning wheel frame 13a, an upper tensioning wheel 13b, a lower tensioning wheel frame 13c, a lower tensioning wheel 13d, a movable bolt A13e, an adjustment spring 13f and a rotating shaft 13g. The upper tensioning wheel frame 13a includes an upper ear plate and an upper hinged portion. The upper portion of the upper ear plate is fixed to one end of the axle of the upper tensioning wheel. The upper hinged portion is vertically connected to the upper ear plate. The upper hinged portion includes an upper connecting plate with an upper notch on the upper portion, and limiting inserts are provided on both sides of the upper notch. The lower portion of the upper connecting plate is connected to the upper rotating shaft insert; the lower tensioning wheel frame includes a lower ear plate, and a lower hinged portion is installed on the lower ear plate. The lower hinged portion includes a lower connecting plate with a lower notch on the bottom, and lower rotating shaft inserts are provided on both sides of the lower notch. The insert is inserted between the two lower shaft inserts and is hinged through the shaft. The shaft is fixed on the left plate 141. The pipe head of the movable bolt A13e is hinged between the two limit inserts. The movable bolt A is sleeved with an adjusting spring 13f. The free end of the movable bolt A passes through the long hole of the lower connecting plate and tightens the locking nut. The distance between the upper and lower tensioning wheels is adjusted through the locking nut 13h at the lower end. The belt tightness caused by the roundness error and wear of the pulley during rotation is completed through the two-way auxiliary tensioning structure.

[0052] The feeding roller 52 is drive-connected to the feeding motor 53 , and the feeding roller 52 is installed at the front of the feeding frame 51 .

[0053] The lifting device is preferably a hydraulic cylinder. The two ends of the rear part of the feeding frame are hinged between the left and right side plates and are located above the dustproof plate. A support box frame 26 is provided at the rear of the dustproof plate 24. The support box frame 26 includes a box shell 27 fixedly connected to the rear of the dustproof plate, two support arms 28 are provided on the top plate of the box shell, and a rear connecting plate 29 is provided at the rear of the box shell. One end of the hydraulic cylinder is installed at the rear top of the feeding frame, and the other end of the hydraulic cylinder is installed at the rear top of the support arm.

[0054] Specifically, the left and right side plates above the dustproof plate 24 are provided with corresponding hinge holes 140a, 140b, and hinge shafts are installed at the hinge holes, and the feeding frame 51 is hinged on the two hinge shafts. Figure 7 As shown, the feeding frame 51 includes a left plate arm 231, a right plate arm 232 and an upper cover plate body 233. The two ends of the feeding roller 52 are connected to the mounting grooves at the lower parts of the left plate arm and the right plate arm. The upper outer part of the upper cover plate body is hinged to the piston rod end of the hydraulic cylinder 54. The bottom end of the hydraulic cylinder 54 is hinged to the upper end of the support arm 28. The support arm is bent, and its upper part is bent backward. The piston rod of the hydraulic cylinder corresponds to the groove of the front vertical plate 145a above the rear of the dustproof plate. The front vertical plate is used to prevent the broken materials from flying backward after the feeding roller is lifted. The outer surface of the feeding roller is evenly distributed with feeding teeth in the axial direction. Four groups of annular ribs are evenly distributed at the end and the middle position of the feeding roller. The right side of the feeding roller is connected to the feeding frame through a flange shaft and a bearing. The left side of the feeding roller is connected to the feeding motor through a flange sleeve. The feeding motor is connected to the motor bracket, and the motor bracket is installed on the feeding frame. The feeding frame can rotate around the hinge shaft under the action of the hydraulic cylinder. After the feeding roller is fully lifted, it can be located as a whole behind the front teeth of the crushing roller. The multi-way control valve connected to the hydraulic cylinder is equipped with a floating position and a self-locking position. The feeding roller can float around the hinge shaft or stop at any position. When crushing combustible materials on the ground, the feeding roller is in a floating position and rotates counterclockwise to assist in feeding. When cleaning shrubs, tall grass and small trees, the feeding roller can be lifted to a medium-high position and the hydraulic cylinder control valve is placed in the self-locking position. At this time, the feeding roller does not rotate and acts as a material block. When felling is required, the feeding roller is fully lifted to the rear of the crushing roller. During the felling process, the stroke of the hydraulic cylinder can be adjusted in real time to control the trees to fall away from the main machine. Feed teeth are evenly distributed axially on the outer surface of the feed roller, and four groups of annular ribs are evenly distributed at the end and middle of the feed roller. The right side of the feed roller is connected to the feed frame through a flange shaft and a bearing, and the left side of the feed roller is connected to the feed motor through a flange sleeve. The feed motor is connected to the motor bracket, and the motor bracket is installed on the feed frame.

[0055] A side push mechanism is provided at the rear of the supporting box frame. Figure 8As shown, the side thrust mechanism 3A includes a sliding drive structure, a track plate and a mounting seat structure. The sliding drive structure includes a double-acting hydraulic cylinder 31, a pulley mechanism 32 and a sliding structure 33. The two piston rod ends of the double-acting hydraulic cylinder 31 are respectively installed on the pulley 321 of the pulley mechanism 32 through a U-shaped plate and a pin shaft. A wire rope 322 is wound around the pulley 321. The lower end of the wire rope 322 is fixed on the track plate 34, and the upper end of the wire rope 322 is fixed to the upper slide rail 331 of the sliding structure 33 through a pull rod 323. The sliding structure 33 includes a sliding frame 330, an upper sliding rail 331, a lower sliding rail 332, a lower sliding rail mounting plate 333 and an adjusting bolt group 334. The upper sliding rail 331 is fixed to the upper part of the sliding frame 330, the lower sliding rail mounting plate 333 is fixed to the bottom of the sliding frame 330, the upper end of the track plate 34 is inserted into the lower sliding groove of the upper sliding rail 331, and a lower sliding rail 332 is arranged below the sliding frame 330. The lower sliding rail 332 is located above the lower sliding rail mounting plate 333, and a bolt group consisting of an array of fixing bolts and adjusting bolts is installed on the upper sliding rail mounting plate. The free end of the adjusting bolt passes through the lower sliding rail mounting plate and abuts against the bottom wall of the lower sliding rail to adjust the depth of the bolt screwing in, thereby adjusting the gap between the upper and lower sliding rails and the track plate, and the fixing bolt passes through the lower sliding rail mounting plate and is connected to the lower sliding rail. The mounting seat structure includes a support box 35 and a mounting plate 36, the track plate is connected to the front of the support box, the double-acting hydraulic cylinder is installed above the support box, and the mounting plate is installed at the rear of the support box.

[0056] The pull rod member 323 includes a support plate 3231, a concave plate 3232 and a bolt A3233. The support plate is fixed to the rear of the upper slide rail 331. The bottom plate of the concave plate is connected to the support plate by bolts. A pin shaft A3234 is passed between the two side plates of the concave plate. The upper end of the steel wire rope is fixed on the pin shaft A, and the tightness of the steel wire rope can be achieved by the bolts.

[0057] like Fig. 8A As shown, three ear plates and a middle ear plate are provided on the top of the sliding frame 330. The middle ear plate is connected to the upper end of the rear connecting plate 153 through a pin bolt and a bearing to achieve the rotation of the rear connecting plate relative to the sliding frame when adapting to different terrains. The ear plates on both sides are connected to the rear connecting plate through a steel chain 50 and a spring 51. Two bolts are provided at the lower part of the sliding frame, which are connected to the two arc grooves 153a of the rear connecting plate through the two bolts. A wear-resistant plate 153b is provided on the rear connecting plate between the two arc grooves.

[0058] The rear part of the side-thrust mechanism 3 is mounted on the hydraulic crawler work vehicle 4A. The side-thrust mechanism 3 can realize the left and right movement of the crushing device and the feeding device, and realize a larger lateral movement distance in a limited space to meet the needs of belt opening and crushing operations in special terrains. The crushing teeth are directional. When viewed from the front, when the crushing teeth are downward and the crushing roller rotates downward, the crushing teeth open the isolation belt; when the combustible material is crushed, the crushing roller is installed left and right, the crushing teeth are upward, the crushing roller rotates upward, and the feeding roller rotates upward close to the crushing roller side. The feeding roller and the crushing roller cooperate to bring the combustible material to the upper bottom knife. The combustible material is chopped into pieces by the upper bottom knife and the cutter head and enters the rear side, and then is crushed into a specified size by the cutter head and the screen; the feeding mechanism assists the crushing mechanism to complete the belt opening and crushing operations. The working head is installed on the lifting arm of the hydraulic crawler work vehicle, or on a liftable and rotatable frame on the hydraulic crawler work vehicle, so that the working head can be lifted and rotated within a certain range, and the hydraulic crawler work vehicle can move forward, backward and turn when the working head is operating.

[0059] like Figures 9 to 13C As shown, it is another preferred embodiment of the utility model. The main difference from the above embodiment is that the teeth of the feeding roller of this embodiment are front teeth, the feeding roller is a front tooth feeding roller, the front tooth feeding roller is close to the ground, and the front tooth feeding roller rotates upward when viewed from the front. The feeding roller rotates in the same direction as the crushing roller, first picking up the combustibles under the forest and rotating them, and then conveying them through the crushing roller, and crushing them through the upper bottom knife and screen; the rake angle a of the front blade surface of the teeth of the front tooth feeding roller is 0 degrees-60 degrees. The specific working process is that the crushing roller rotates forward and upward at a speed of more than 500rpm, the front tooth feeding roller rotates forward and upward at a speed of less than 100rpm, the whole machine moves forward at a speed of less than 5km / h, the feeding roller is arranged in front of the crushing roller and is positioned low, the diameter of the feeding roller is about half of the diameter of the crushing roller, and the whole crushing work head is approximately close to the ground and moves forward with the whole machine. The feeding roller picks up the branches in front of the machine and sends them to the crushing roller through the top. After the crushing roller contacts the branches, it drives the branches and passes through the upper bottom knife and the rear screen to crush and discharge. The same structure of this embodiment as the first embodiment will not be repeated here.

Claims

1. A forest understory combustible material crushing working head, characterized by: It includes a main frame, a crushing roller device, an upper bottom knife, a screen and a feeding device; The main frame includes a left side plate, a right side plate and an upper bottom knife fixing seat, a screen is provided between the left and right side plates, the upper bottom knife fixing seat is fixed between the left and right side plates at the front of the upper part, and the upper bottom knife is installed on the upper bottom knife fixing seat; The crushing roller device comprises a driving device and a crushing roller connected to the driving device. The crushing roller rotates upward when viewed from the front. The upper bottom knife and the screen mesh are matched with the teeth of the crushing roller. The feeding device is installed at the front lower part of the crushing roller device. The feeding device includes a feeding frame and a feeding roller. The feeding roller is installed on the feeding frame. The feeding roller cooperates with the crushing roller to transport the combustible materials under the forest and crush them through the upper bottom knife and the screen.

2. The understory combustible material crushing working head according to claim 1 is characterized by: The feeding roller is a rear-toothed feeding roller, which rotates downward when viewed from the front. The feeding roller rotates in the opposite direction to the crushing roller, first pushing the combustibles under the forest to the rear, rotating and carrying them up, and transporting them in cooperation with the crushing roller, and then crushing them through the upper bottom knife and the screen.

3. The understory combustible material crushing working head according to claim 1 is characterized by: The feeding roller is a front-toothed feeding roller, which is close to the ground and rotates upward when viewed from the front. The feeding roller rotates in the same direction as the crushing roller, first picking up the combustible materials under the forest and rotating them up, and then transporting them through the crushing roller, and crushing them through the upper bottom knife and the screen; the rake angle a of the front cutting edge of the teeth of the front-toothed feeding roller is 0 degrees to 60 degrees.

4. The understory combustible material crushing working head according to claim 2 or 3, characterized in that: The feeding frame is detachably connected or hinged to the main frame. When hinged, the feeding frame is connected to the lifting device.

5. The understory combustible material crushing working head according to claim 4 is characterized in that: The left and right ends of the crushing roller have the same structure. The feeding roller is lifted or removed. The crushing roller is removed and then switched to the left and right ends for use. The crushing roller rotates forward, and the crushing working head performs the operation of opening a fire isolation zone.

6. The understory combustible material crushing working head according to claim 1 is characterized by: A dustproof plate is installed between the rear parts of the left and right plates, and the dustproof plate is located behind the screen. A positioning plate under the screen is installed below the screen, and a discharge space is formed between the screen and the dustproof plate as well as the left and right side plates.

7. The understory combustible material crushing working head according to claim 6 is characterized by: The inner wall of the dustproof plate is provided with several support plates spaced laterally, the screen is located in front of the support plate, the positioning plate under the screen is a lower bottom knife fixing seat, the lower bottom knife is installed on the lower bottom knife fixing seat, the lower parts of the left plate and the right plate are provided with open grooves, and the crushing roller is installed on the open groove; guide columns are respectively inserted in the notches on the upper and lower parts of the support plate, and a side opening for the screen to slide into is provided on the right plate, and the screen slides into the gap between the screen positioning plate of the left plate and the leftmost support plate along the guide column and the upper and lower bottom knife fixing seats, and a screen sealing plate is connected to the position of the right plate corresponding to the screen, and the lower part of the discharge space is open and gradually expands from top to bottom; The lower part of the upper bottom knife fixing seat is used to support the upper end of the screen and is located in front of the upper part of the dustproof plate. The upper bottom knife fixing seat and the lower bottom knife jointly position the upper and lower ends of the screen. The upper bottom knife adopts a square structure and has threaded mounting holes on all four sides so that the four edges of the upper bottom knife can be used. The lower bottom knife fixing seat is located in front of the lower part of the dustproof plate.

8. The understory combustible material crushing working head according to claim 1 is characterized by: The driving device includes a hydraulic motor and a pulley structure. The hydraulic motor is installed on the left side plate. The hydraulic motor drives the active pulley connected to the pulley structure. The crushing roller includes a roller, knife teeth, a driven pulley and a flange shaft. Two groups of driven pulleys are symmetrically distributed on both sides of the crushing roller. The driven pulley is connected to the flange shaft, and the flange shaft is connected to the flange plate on the inner side of the roller by bolts.

9. The understory combustible material crushing working head according to claim 4 is characterized by: The lifting device is a hydraulic cylinder, and the feeding roller is connected to the feeding motor drive. The feeding roller is installed at the front of the feeding frame. The rear ends of the feeding frame are hinged between the left and right side plates and are located above the dustproof plate. One end of the hydraulic cylinder is installed at the rear top of the feeding frame, and the other end of the hydraulic cylinder is installed at the rear top of the main frame. The feeding roller can be lifted around the hinge shaft under the action of the lifting device.

10. The understory combustible material crushing working head according to claim 9, characterized in that: The oil inlet and outlet ports of the hydraulic cylinder are connected to the multi-way valve control of the main machine. The multi-way valve has a stop position and a floating position. When the multi-way valve is in the floating position, the feeding roller can rise and fall according to the load. When the multi-way valve is in the stop position, the hydraulic cylinder is locked and the feeding roller is in a desired position.

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