A logging head cutting device and control method

Abstract

This invention relates to the field of logging head technology, specifically disclosing a logging head cutting device and its control method. The device includes a chain plate and a sprocket, with chain-shaped blades mounted on the sprocket and chain plate. It also includes a saw assembly support, on which a saw guide seat is mounted, and a saw guide plate is slidably mounted. The saw guide plate is connected to the chain plate. The device further includes a displacement component and a locking component. The displacement component drives the saw guide plate to move, thereby adjusting the tension of the chain-shaped blades. The locking component locks the saw guide plate. The control method includes tension adjustment and locking control. This invention offers advantages such as convenient chain-shaped blade tension adjustment and replacement, and high reliability.

Description

Technical Field

[0001] This invention relates to the field of logging head technology, specifically to a logging head cutting device and control method. Background Technology

[0002] The felling head is the core component of a logging machine, used to cut and prune trees. Its principle involves a sprocket driving a chain-like blade to rotate at high speed, thus cutting the wood. Therefore, the chain-like blade requires maintenance after a period of use. During maintenance, the locking mechanism of the chain-like blade directly affects the ease of operation and the stability of the high-speed operation. Traditionally, the locking mechanism of chain-like blades involves manually tightening the chain and then adjusting and pressing it with bolts for locking. However, during high-speed cutting, the chain-like blade experiences significant vibration and stress in all directions. Therefore, chain loosening often leads to operational malfunctions. The root cause is that the locking mechanism of the chain-like blade becomes loose due to vibration and stress, resulting in the loosening of the chain-like blade. Summary of the Invention

[0003] To address the above shortcomings, this invention provides a logging head cutting device and control method that offers convenient and effective tension adjustment for chain-shaped blades.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A logging head cutting device includes a chain plate and a sprocket, with chain-shaped blades mounted on the sprocket and chain plate. It also includes a saw assembly support, on which a saw guide seat is mounted, and a saw guide plate is slidably disposed. The saw guide plate is connected to the chain plate. Furthermore, it includes a displacement component and a locking component. The displacement component drives the saw guide plate to move, thereby adjusting the tension of the chain-shaped blades. The locking component locks the saw guide plate.

[0006] The displacement assembly includes a tension cam and a spring adjustment assembly. The saw guide seat is provided with a tension shaft adjustment slot. A tension shaft is movably disposed within the tension shaft adjustment slot. The tension cam and the saw guide plate are respectively disposed on both sides of the saw guide seat. The tension shaft passes through the tension cam and the tension shaft adjustment slot, and its end is connected to the saw guide plate. The displacement assembly drives the tension shaft to move via the tension cam, thereby causing the saw guide plate and the chain plate to move, thus achieving tension adjustment of the chain-shaped blade.

[0007] The spring adjustment assembly is equipped with an adjustment screw, the lower end of which is connected to the tensioning cam. The rotation of the tensioning cam is adjusted by extending or retracting the adjustment screw.

[0008] Optionally, the spring adjustment assembly further includes a spring support and a spring; the spring support is mounted and fixed on the saw assembly support; the spring support is provided with a guide seat and the spring, and the adjustment screw is telescopically disposed through the guide seat; the adjustment screw is provided with an adjustment nut, and the spring is sleeved on the adjustment screw, with the spring disposed between the guide seat and the adjustment nut.

[0009] Optionally, the tensioning cam is designed with several adjusting screw mounting holes, and the adjusting screws are connected to the tensioning cam through the adjusting screw mounting holes.

[0010] Optionally, it also includes a spacer, a transition block, and a locking bolt; the spacer and the transition block are fixed to the tensioning cam by the locking bolt, and one end of the adjusting screw is connected to the transition block.

[0011] Optionally, the locking assembly is a chain plate tensioning cylinder, and an end limiting block is provided at the outer end of the tensioning shaft. The chain plate tensioning cylinder is disposed between the tensioning cam and the end limiting block, and the tensioning cam is pressed and fixed by the extension of the chain plate tensioning cylinder.

[0012] Optionally, the saw guide seat is provided with a guide key, and the saw guide plate is provided with a guide key mating groove corresponding to the guide key. The saw guide plate and the saw guide seat are in clearance fit, and the saw guide plate can move along the guide key.

[0013] Optionally, the saw guide seat is provided with an oil passage groove, which is located on the contact surface between the saw guide plate and the saw guide seat; the oil passage groove is connected to an oil passage groove inlet pipe; and the saw guide plate is provided with a lubricating oil guide hole corresponding to the oil passage groove.

[0014] Optionally, it also includes a chainsaw motor, which is mounted on the saw protection assembly. The saw assembly support and the deep groove ball bearing are assembled and then fitted onto the head of the chainsaw motor. The saw guide seat is mounted on the saw assembly support. It also includes a chainsaw cylinder. The saw mounting bracket of the saw protection assembly is provided with a chainsaw cylinder mounting support. The chainsaw cylinder is installed between the chainsaw cylinder mounting support and the saw guide seat. The head pin is mounted on the chainsaw cylinder mounting support, and the tail pin is mounted on the saw guide seat.

[0015] A method for adjusting the chain-shaped blades of a logging head, using a logging head cutting device as described above, includes the following adjustment method:

[0016] The tension is adjusted by adjusting the adjusting nut on the adjusting screw through the spring adjusting assembly, which compresses the spring installed on the adjusting screw and applies a preload. The adjusting screw slides in the guide seat, driving the tensioning cam to rotate, which in turn causes the saw guide plate and the chain plate to shift, thereby achieving tension adjustment of the chain-shaped blade.

[0017] Optionally, it also includes locking control, which uses the extension and retraction of the chain plate tensioning cylinder to tension the tensioning cam, thereby locking and fixing the chain-shaped blade.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention enables rapid adjustment and replacement of the chain blades by adjusting the displacement of the chain plate through a spring adjustment component. The adjustment is reliable and easy to operate. At the same time, the chain plate tensioning cylinder is set to clamp and fix the adjusted chain plate, which significantly improves the stability of the chain plate and prevents the chain blades from loosening when sawing wood at high speed, thus affecting the cutting efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the rear side of the saw protection component of the present invention;

[0023] Figure 3 This is a schematic diagram of the front three-dimensional structure of the saw protection component of the present invention;

[0024] Figure 4 This is a schematic diagram of the assembled saw mounting assembly and chainsaw hydraulic cylinder components of the present invention.

[0025] Figure 5 This is a schematic diagram of the saw mounting assembly of the present invention;

[0026] Figure 6 yes Figure 5 A partial sectional view;

[0027] Figure 7 yes Figure 1 A partial structural diagram;

[0028] Figure 8 yes Figure 1 A partial structural diagram;

[0029] Figure 9 yes Figure 5 A schematic diagram of the structure after removing the chain plate tensioning cylinder;

[0030] Figure 10 yes Figure 9 A schematic diagram of the structure after removing the tensioning cam;

[0031] Figure 11 yes Figure 5 Front structure diagram;

[0032] Figure 12 This is a schematic diagram of the structure after the spring adjustment assembly and the tensioning cam are assembled.

[0033] Figure 13 This is a schematic diagram of the saw guide seat of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "inner", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] A logging head cutting device, such as Figures 1-13As shown, the assembly includes a saw protection component 1, a saw mounting assembly 2, and a chainsaw cylinder hydraulic assembly 3. The saw protection component 1 consists of a saw mounting bracket 11, an end guard 12, a rubber buffer pad 13, a chainsaw cylinder mounting support 14, a chainsaw motor mounting plate 15, a chainsaw motor protective cover 16, and a through-plate connector 17. The saw mounting bracket 11 of the saw protection component 1 is installed on the left side of the felling head frame, the end guard 12 is installed on the saw mounting bracket 11, the rubber buffer pad 13 is installed between the saw mounting bracket 11 and the end guard 12, the chainsaw cylinder mounting support 14 is installed inside the upper part of the saw mounting bracket 11, the chainsaw motor mounting plate 15 is installed on the chainsaw motor mounting hole of the saw mounting bracket 11, the chainsaw motor protective cover 16 is installed at the left rear end of the saw mounting bracket 11, and the through-plate connector 17 is installed on the inner back plate of the saw mounting bracket 11. The structural components of the saw protection assembly 1 of the present invention are made of high-strength steel, which has impact resistance and wear resistance; a rubber buffer pad 13 is installed between the saw mounting bracket 11 and the end protective cover 12, which can effectively buffer the impact and prevent the protection assembly from deforming.

[0038] The saw mounting assembly 2 includes a chainsaw motor 201, a saw assembly support 202, a deep groove ball bearing 203, a bearing end cover 204, a saw guide seat 205, a connecting flange 206, a sprocket 207, a key 208, a saw guide plate 209, a guide key 210, a chain plate 211, a chain-shaped blade 212, a chain plate clamping block 213, a tensioning cam 214, a chain plate tensioning cylinder 215, and a tensioning shaft 216. The chainsaw motor 201 of the saw mounting assembly 2 is mounted on the chainsaw motor mounting plate 15 on the saw protection assembly 1. After the saw assembly support 202 and the deep groove ball bearing 203 are assembled, they are fitted onto the head of the chainsaw motor 201. The bearing end cover 204 is assembled at the end of the chainsaw motor 201 to limit the deep groove ball bearing 203. The saw guide seat 205 is assembled on the saw assembly support 202 and presses against the deep groove ball bearing 203. 03 The outer ring prevents it from moving around. The connecting flange 206 is assembled on the drive shaft of the chainsaw motor 201 by cooperating with the key 208. The sprocket 207 is assembled on the drive shaft of the chainsaw motor 201 and is tightly attached to the connecting flange 206 by cooperating with the key 208. The key 208 is assembled between the drive shaft of the chainsaw motor 201, the connecting flange 206 and the sprocket 207. The saw guide plate 209 is assembled on the saw guide seat 205 with the guide key 210. The guide key 210 is assembled between the saw guide seat 205 and the saw guide plate 209. The chain plate 211 is installed and fixed on the saw guide plate 209. The chain-shaped blade 212 is installed on the sprocket 207 and the chain plate 211. The chainsaw motor 201 drives the sprocket 207 to rotate. The chain-shaped blade 212 assembled on the sprocket 207 and the chain plate 211 achieves high-speed sawing under the drive of the sprocket 207.

[0039] like Figure 11As shown, the chain plate clamping block 213 tightens the chain plate 211 onto the saw guide plate 209 using screws 213-1; in order to achieve tension adjustment and locking of the chain-shaped blade 212, a displacement component and a locking component are provided in this embodiment, such as... Figures 9-10 As shown, the displacement assembly includes a tensioning cam 214, and the saw guide seat 205 is provided with a tensioning shaft adjustment waist-shaped hole 216-2; the tensioning shaft 216 is movably disposed in the tensioning shaft adjustment waist-shaped hole 216-2; the tensioning cam 214 and the saw guide plate 209 are respectively disposed on both sides of the saw guide seat 205; the tensioning shaft passes through the tensioning cam 214 and the tensioning shaft adjustment waist-shaped hole, and its end is connected to the saw guide plate 209; the displacement assembly drives the tensioning shaft 216 to move through the tensioning cam 214, thereby causing the saw guide plate 209 and the chain plate 211 to move, thereby realizing the tensioning and replacement of the chain-shaped blade 212.

[0040] In this embodiment, in order to improve the smoothness and reliability of the saw guide plate 209, a guide key 210 is provided on the saw guide seat 205, and a guide key mating groove 209-1 is provided on the saw guide plate 209 corresponding to the guide key 210. The saw guide plate 209 is in clearance fit with the saw guide seat 205 and can move along the guide key 210.

[0041] For ease of adjustment, the displacement assembly further includes a spring adjustment assembly, which includes an adjusting screw 217, a spring support 219, and a spring 218. The spring support 219 is mounted and fixed on the saw assembly support 202 via a bracket. A guide seat 217-1 and the spring 218 are provided on the spring support 219. The adjusting screw 217 is telescopically connected through the guide seat 217-1. An adjusting nut is provided on the adjusting screw 217. In this embodiment, a double nut is used. The spring 218 is sleeved on the adjusting screw 217 and is positioned between the guide seat and the adjusting nut. The lower end of the adjusting screw 217 is connected to the tensioning cam 214. By adjusting the double nuts on the adjusting screw 217, the spring 218 mounted on the adjusting screw 217 is compressed, and the spring 218 is subjected to preload. The adjusting screw 217 slides in the guide seat, driving the tensioning cam 214 to rotate. Because the tensioning cam 214 has an eccentric structure, when the tensioning cam 214 rotates clockwise, it pushes the tensioning shaft 216 to move to the left. The tensioning shaft 216 then pushes the saw guide plate 209 to move to the left along the guide key, thereby tensioning the chain-shaped blade 212. In this embodiment, the tensioning cam 214 is designed with four adjusting screw mounting holes. The adjusting screw 217 can be installed in the appropriate mounting hole according to the actual installation angle. The adjusting screw 217 is connected to the tensioning cam 214 through the adjusting screw mounting holes. Figure 12 As shown, it also includes a spacer, a transition block, and a locking bolt; the spacer and the transition block are fixed to the tensioning cam 214 by the locking bolt, and one end of the adjusting screw 217 is connected to the transition block.

[0042] In this embodiment, the locking component is a chain plate tensioning cylinder 215. An end limiting block 216-1 is provided at the outer end of the tensioning shaft 216. In this embodiment, the chain plate tensioning cylinder 215 is mounted on the tensioning shaft 216 and fits against the tensioning cam 214, i.e., it is positioned between the tensioning cam 214 and the end limiting block 216-1. The tensioning cam 214 is pressed and fixed by the extension of the chain plate tensioning cylinder 215. For example, in this embodiment, under the adjustment of the hydraulic control system, when the cutting device is working (cutting wood), the chain plate tensioning cylinder 215 applies tension force, causing the tensioning shaft 216 to tension the chain plate 211. The purpose is to prevent the chain-shaped blade 212 from loosening during high-speed sawing of wood, thus affecting cutting efficiency. When the cutting device is not working, the tensioning cylinder 215 has no tension force.

[0043] In this embodiment, to achieve lubrication of the chain-shaped blade 212, an oil passage groove 205-2 is provided on the saw guide seat 205. The oil passage groove is located on the contact surface between the saw guide plate 209 and the saw guide seat 205. The oil passage groove is connected to an oil passage groove inlet pipe 205-1. A lubricating oil guide hole 209-2 is provided on the saw guide plate 209 corresponding to the oil passage groove.

[0044] The chainsaw hydraulic assembly 3 consists of a chainsaw cylinder 31, a head pin 32, a tail pin 33, a chainsaw cylinder inlet pipe 34, a chainsaw cylinder return pipe 35, a chainsaw lubrication oil supply pipe 36, and a tensioning cylinder oil supply pipe 37. The saw mounting bracket 11 of the saw protection assembly 1 is equipped with a chainsaw cylinder mounting support 14. The chainsaw cylinder 31 is installed between the chainsaw cylinder mounting support 14 and the saw guide seat 205. The head pin 32 is mounted on the chainsaw cylinder mounting support 14, and the tail pin 33 is mounted on the saw guide seat 205. After being assembled into the machine, the chainsaw cylinder 31 of this embodiment has a built-in displacement sensor. When the four sets of blades of the felling head clamp the wood, the drive cylinder mounted on the four sets of blades collects the wood diameter data through the built-in displacement sensor. The data is transmitted to the chainsaw cylinder 31 through the electronic control system of the felling head. The chainsaw cylinder 31 pushes the saw assembly 2 to cut the wood. After the wood is cut, the saw assembly 2 will automatically retract. The felling head continues to transport the wood to a specified length and then completes the reciprocating cut.

[0045] The cutting device is equipped with an automatic lubrication system. The felling head has a lubricating oil tank with a built-in sensor. During sawing, the lubricating oil is delivered to the saw guide seat 205 via the chainsaw lubrication pipe 36 and then to the chain-shaped blade 212 through the lubrication guide hole 209-2, thus lubricating the chain-shaped blade 212. When the cutting device is not in operation, there is no lubrication output. This design significantly improves cutting efficiency and reduces cutting malfunctions.

[0046] A method for adjusting the chain-shaped blades of a logging head, using a logging head cutting device as described above, includes the following adjustment method:

[0047] Tension adjustment is achieved by adjusting the adjusting nut on the adjusting screw via the spring adjusting assembly. This compresses the spring mounted on the adjusting screw, applying a preload. The adjusting screw then slides within the guide seat, driving the tensioning cam to rotate. This, in turn, causes displacement of the saw guide plate and the chain plate, thus adjusting the tension of the chain-shaped blades. This method allows for quick, convenient, and reliable tension adjustment of the chain-shaped blades.

[0048] Optionally, a locking control is also included, which uses the extension and retraction of the chain plate tensioning cylinder to tension the tensioning cam, thereby locking and fixing the chain-shaped blade. By utilizing a hydraulic control system, high-strength tension force can be achieved, significantly improving the locking and fixing effect.

Claims

1. A cutting device for a harvesting head comprising a chain plate and a sprocket, a chain of blades being mounted on the sprocket and the chain plate, characterized in that: The saw subassembly support is provided with a saw guide seat, and a saw guide plate is slidably arranged on the saw guide seat; the saw guide plate is connected with the chain plate; a displacement assembly and a locking assembly are further included, the displacement assembly is used to drive the saw guide plate to displace to adjust the tension of the chain blade, and the locking assembly is used to lock the saw guide plate; The displacement assembly includes a tensioning cam and a spring adjusting assembly, a tensioning shaft adjusting waist-shaped hole is arranged on the saw guide seat, a tensioning shaft is movably arranged in the tensioning shaft adjusting waist-shaped hole, the tensioning cam and the saw guide plate are arranged on the two sides of the saw guide seat respectively, the tensioning shaft passes through the tensioning cam and the tensioning shaft adjusting waist-shaped hole, and the end of the tensioning shaft is connected with the saw guide plate; the displacement assembly drives the tensioning shaft to displace through the tensioning cam, so as to drive the saw guide plate and the chain plate to displace, thereby adjusting the tension of the chain blade. The spring adjusting assembly is provided with an adjusting screw, the lower end of the adjusting screw is connected with the tensioning cam, and the rotation of the tensioning cam is adjusted by the extension and retraction of the adjusting screw. The spring adjusting assembly further includes a spring support and a spring, the spring support is fixedly arranged on the saw subassembly support, a guide seat and the spring are arranged on the spring support, and the adjusting screw is telescopically arranged through the guide seat; an adjusting nut is arranged on the adjusting screw, the spring is sleeved on the adjusting screw, and the spring is arranged between the guide seat and the adjusting nut. The locking assembly is a chain plate tensioning oil cylinder, an end limiting block is arranged on the outer end of the tensioning shaft, the chain plate tensioning oil cylinder is arranged between the tensioning cam and the end limiting block, and the tensioning cam is tightly fixed by the extension of the chain plate tensioning oil cylinder. A chain saw motor is further included, the chain saw motor is installed on the saw protection assembly, the saw subassembly support is sleeved on the head of the chain saw motor after being assembled with the deep groove ball bearing, and the saw guide seat is arranged on the saw subassembly support; a chain saw oil cylinder is further included, a chain saw oil cylinder mounting support is arranged on the saw blade mounting bracket of the saw protection assembly, the chain saw oil cylinder is mounted between the chain saw oil cylinder mounting support and the saw guide seat, a head pin shaft is arranged on the chain saw oil cylinder mounting support, and a tail pin shaft is arranged on the saw guide seat.

2. A harvesting head cutting device according to claim 1, characterized in that: The tensioning cam is designed with a plurality of adjusting screw mounting holes, and the adjusting screw is connected with the tensioning cam through the adjusting screw mounting holes.

3. A harvesting head cutting device according to claim 1, wherein: A spacer, a transition block and a locking bolt are further included, the spacer and the transition block are mounted and fixed on the tensioning cam through the locking bolt, and one end of the adjusting screw is connected with the transition block.

4. A harvesting head cutting device according to claim 1, wherein: A guide key is arranged on the saw guide seat, a guide key matching groove is arranged on the saw guide plate corresponding to the guide key, the saw guide plate is gap-fitted with the saw guide seat, and the saw guide plate is movable along the guide key.

5. A harvesting head cutting device according to claim 1, wherein: The saw guide seat is provided with an oil passage, which is arranged on the side of the contact surface between the saw guide plate and the saw guide seat; the oil passage is communicated with an oil passage inlet pipe; the saw guide plate is provided with a lubricating oil guide hole corresponding to the oil passage.

6. A method of regulating the chain of cutting heads of a harvester, characterized in that: The method comprises the following steps: The tightness is adjusted by adjusting the adjusting nut on the adjusting screw rod through the spring adjusting assembly, so that the spring installed on the adjusting screw rod is compressed, the spring is pre-tightened, the adjusting screw rod slides in the guide seat, drives the tensioning cam to rotate, and then drives the saw guide plate and the chain plate to displace, so as to realize the tensioning adjustment of the chain-shaped blade.

7. The method of claim 6, wherein: The locking control is also included, the tensioning of the tensioning cam is realized through the extension and retraction of the chain plate tensioning oil cylinder, so as to realize the locking and fixing of the chain-shaped blade.

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