Cutting device with a cutting machine

Abstract

The present invention relates to a kit, apparatus, and system for cutting an object. The apparatus of the present invention comprises a cutting machine having a cutting blade to which an arm is coupled, and the arm is configured to be elastically rotatable from the cutting blade. The arm is biased to the open position. In the open position, the arm is angled away from the cutting blade, forming an expandable opening between the cutting blade and the arm. This opening is suitable for receiving an object, and as the object is pressed against the arm, the opening expands, and as the object is drawn into the opening, the arm rotates away from the cutting blade, pressing the object against the cutting blade.

Description

Technical Field

[0001] Information on Related Applications

[0002] This application claims the benefit and priority of U.S. Provisional Application No. 63 / 453,998, filed on March 22, 2023, and U.S. Provisional Application No. 63 / 514,479, filed on July 19, 2023.

[0003] Each of the above applications is incorporated by reference herein in its entirety, and each application is expressly incorporated as part of this specification.

[0004] The present disclosure generally relates to attachments for cutting machines and cutting machines with attachments, and more specifically to systems, devices, and kits for cutting an object using a cutting machine such as a chainsaw or a lawn mower.

Background Art

[0005] The cutting of trees and vegetation is currently performed manually or by a suspended cutter, but these methods are not always suitable for precise cutting, such as cutting only a specific branch of a tree and not its adjacent branches. Cutting branches using a pole or an extendable rod can be difficult because sufficient force needs to be applied and accurate positioning is required.

[0006] U.S. Patent No. 4,294,012 discloses an arm assembly that can be held in a closed position by a detent means that locks the position of the arm by a spring-loaded split pin. The arm can be freely moved by unlocking the spring-loaded split pin from the arm assembly.

[0007] U.S. Patent No. 8,863,629B2 discloses a pipe cutting fixture that facilitates the attachment of a cutting element to a pipe (for example, to facilitate miter cuts or other desired cuts). The cutting fixture comprises two stabilizing elements that are detachably connected to the pipe by selective clamping and secured in place by set screws, ratchets, or spring-loaded assemblies. The mounting of the cutting system is configured to allow the cutting element to be easily attached to the fixture and provides an axis of rotation for the cutting element.

[0008] U.S. Patent No. 3,834,019 discloses a device for cutting exhaust system components such as tubes. The device includes a tube engagement structure positioned to rotate toward a saw blade and to receive a tube to be cut in a tube receiving recess. A coil spring is connected to the tube engagement structure and configured to perform an elastic biasing motion from the tube receiving position to the cutting cycle completion position, and the tube engagement structure is substantially adjacent to and parallel to the saw blade. A handle is provided for manually rotating the tube engagement structure.

[0009] There is room for improvement. [Overview of the project]

[0010] A system for cutting an object is disclosed, which facilitates remote cutting. "Remote cutting" here may refer to cutting an object without the user directly manipulating it, such as when cutting tree branches that are out of reach using a pole-mounted (or boom-mounted) chainsaw.

[0011] In one embodiment, the system comprises a cutting machine that defines a cutting blade and an arm connected to the cutting machine, wherein the arm is configured to receive an object between the cutting blade and the arm, and to elastically separate from the cutting blade when the object is drawn between the cutting blade and the arm, thereby pressing the object against the cutting blade to facilitate cutting of the object and reducing overload on the cutting machine.

[0012] In some embodiments, the arm is rotatably connected to the cutting machine via a pivot so as to receive the workpiece between the cutting blade and the arm. The arm is configured to elastically rotate away from the cutting blade as the workpiece is pulled in the pivot direction, pressing the workpiece against the cutting blade, thereby facilitating the cutting of the workpiece and reducing overload on the cutting machine.

[0013] One advantage of this configuration is that it allows for the application of appropriate force to the object at the cutting surface. For example, if the cutting machine cuts the object lightly and insufficiently, the arm may press the object against the cutting blade. On the other hand, if the object is pulled too far into the arm, the arm is pushed outward to prevent motor overload.

[0014] During normal operation of a chainsaw, relatively little pressure is applied, and the material is automatically fed into the cutting section by the incidental feed pressure generated by the chainsaw. Excessive feed pressure can easily overload the motor and is therefore desirable to prevent. As a benefit, an elastic arm may be configured to swing or retract away from the blade under conditions of excessive feed pressure, thereby reducing the force acting and consequently reducing the feed pressure and thus the load on the motor. For example, a spring and / or other component assisting the elastic movement of the arm may be configured based on a predetermined pressure, such as a threshold feed pressure or the pressure pressing the material against the cutting blade. In some embodiments, a spring may be selected with consideration to its spring constant so that the arm retracts under conditions of motor overload. For example, the spring may have sufficient stiffness to provide the force that generates the feed pressure, while also having the flexibility to allow retraction when excessive feed pressure occurs. As a benefit, motor overload may be mitigated.

[0015] As mentioned above, the boom may be connected to the rotary cutting machine. In some embodiments, the boom may not be provided, or if provided, the boom may be connected to one or more additional components that assist in remote cutting.

[0016] The pivot may be positioned on the guide for the cutting blade of the cutting machine. The cutting machine may be a chainsaw, and the cutting chain may be attached to the peripheral edge of the guide.

[0017] The spring may provide an elastic connection and may be, for example, a circular spring (torsion spring) along the pivot axis. The spring may be connected to the arm at the pivot to a guide or other fixed structure.

[0018] The spring may be a linear spring connected to the arm at a first distance from the pivot, and may apply torque to the object, pressing it against the cutting blade to facilitate its cutting. The connecting bar may be rotatably connected around the pivot. The first and second ends are the opposite ends of the connecting bar, and the arm may be connected to the first end. A linear restoring force may be applied via the second end, and torque may be applied.

[0019] The arms may extend symmetrically with respect to the cutting blade. The arm is a first arm, and the second arm is positioned opposite the first arm with respect to the cutting blade and / or guide. Each arm may be independently operable. The first and second arms may extend outward from each other from a pivot. The first and second arms may extend parallel to each other on the opposite side of the cutting blade and / or guide.

[0020] The guide may have multiple holes to allow for the selective connection of an arm to the guide.

[0021] The arm may have a tapered end to receive the object.

[0022] The arm may be positioned away from the cutting blade along the pivot axis.

[0023] The arm may be attached to the guide and / or cutting machine via a clamp. The clamp may be a two-piece clamp. The two-piece clamp may have engaging members that engage with each other and be joined so as to sandwich the guide between them. The engaging members that engage with each other may pass through holes in the guide. The engaging members may have hook-shaped (e.g., L-shaped) projections and / or recesses for engaging with each other. The members may be joined to form a sleeve that clamps the outside of the guide. The members may form a C-shaped clamp on the guide. Each member may be substantially U-shaped and joined to each other to form a rectangular annular sleeve.

[0024] The cutting machine may be a chainsaw. The cutting machine may be a brush cutter or other rotary cutting tool or device. The arms may extend across the blade and provide support on both sides to the object to be cut. A fence may be provided. The arms and fence may be connected to each other directly or via a center plate. The arms and fence may each be rotatable independently around the center plate. The arms may be connected to the body of the rotary cutting tool or device (such as a brush cutter, grinder, or chainsaw), for example, to a disc guard-shaped guide, via a torsion spring such as a coil spring. The arms may be planar and / or arc-shaped.

[0025] The elastic rotation of the arm may be provided by a motor and / or sensors controlled by a controller. As described later, in some embodiments, the elastic rotation may be based on the power consumption of the motor.

[0026] A system for cutting an object is disclosed. The system includes a cutting machine defining a motor and a cutting blade operably coupled to the motor, an arm pivotally coupled to the cutting machine via a pivot for receiving an object between the cutting blade and the arm, a sensor for sensing data indicative of the motor output, and an actuator for rotating the arm in response to the measurement of the sensor and controlling to press the object against the cutting blade to facilitate cutting of the object.

[0027] A method of cutting an object using a motor-driven cutting machine is disclosed. The method includes generating data indicative of the motor output during cutting, and controlling an arm opposite the object and controlling the cutting force on the object based on the generated data. thing A system for cutting an object using a motor-driven cutting machine is disclosed. The system includes a processor and a computer-readable memory connected to the processor and storing processor-executable instructions, which when executed cause the processor to generate data indicative of the motor output during cutting and, based on the generated data, control an arm opposite the object and control the cutting force on the object.

[0028] A non-transitory computer-readable medium storing machine-readable instructions that, when executed by a processor, cause the processor to perform a computer-implemented method of cutting an object using a motor-driven cutting machine is disclosed, the method including generating data indicative of the motor output during cutting and, based on the generated data, controlling an arm opposite the object and controlling the cutting force on the object.

[0029]

[0030] ​In some embodiments, the arm may be controlled based on sensor data to increase or decrease the force applied to the object to be cut. In some embodiments, the arm may be controlled to optimize the efficiency of the motor, avoid overloading the motor, extend the motor life, and / or extend the battery drive time.

[0031] In some aspects, a system for cutting an object is disclosed. The system further includes a cutter defining a cutting blade, and an arm coupled to the cutter, rotatable elastically away from the cutting blade, and biased to an open position. The arm is angled away from the cutting blade in the open position, and defines an expandable opening suitable for receiving an object between the cutting blade and the arm. The opening is configured to expand when the object is pressed against the arm, and to rotate the arm from the cutting blade to press the object against the cutting blade when the object is drawn into the opening.

[0032] The embodiment may include one or more of the following features: an arm connected to a cutting machine via a spring that is unloaded in the open position, and a system that holds the arm away from the cutting blade in the open position. The arm rotates away from the cutting blade about a pivot point, and the opening is expanded by pulling the object toward the pivot point. The system may include a clamp that is clamped to a guide of the cutting blade and whose end is rotatably connected to the arm. The system may include a tension spring connected to the arm and the guide of the cutting blade, which flexes as the arm rotates, generating a restoring force that returns the arm to the open position. The tension spring is slidably housed in a collar, and the end of the tension spring flexes as the arm rotates, contacting the collar. In the open position, the arm is inclined at least 45° away from the cutting blade. A portion of the arm defining the end of the opening is located at the center of the cutting plane defined by the cutting blade. The system may include a boom connected to the cutting machine. The cutting machine includes a motor configured to cut an object via the cutting blade. The system may include a sensor that detects data indicating the motor output of a motor, an actuator connected to move an arm closer to and further away from a cutting blade, and a controller that receives data from the sensor and is operably connected to the actuator. The controller is configured to control the rotation of the arm in response to the data and to control the action of pressing the object against the cutting blade. The controller includes a processor and a computer-readable memory connected to the processor that stores processor-executable instructions, the processor being configured to receive data during cutting when an instruction is executed and to control the arm on the opposite side of the object based on the data to reduce the load on the motor. The cutting machine is a chainsaw, with a cutting chain mounted on the periphery of the guide of the cutting blade. The arm includes a first portion rotatably connected to the cutting machine and positioned near the cutting blade, and a second portion positioned away from the cutting blade, rotatably connected to the first portion, and connected to the cutting machine via the first portion. The second part is configured to rotate in one direction around the first part, allowing rotation toward the cutting blade around the first part, while preventing rotation away from the cutting blade around the first part.The arm includes a roller positioned at the end of the arm. The arm includes a first tubular section positioned at a second tubular section, and the arm is extendable by the expansion and contraction of the first and second tubular sections relative to each other. The arm is detachably mounted to the cutting machine. The arm is connected to the cutting machine via an actuator configured to elastically rotate the arm relative to the cutting blade. The arm includes a wheel positioned at an end spaced away from the cutting machine, configured to roll the wheel relative to the object as the object is received into the opening. The arm is a first arm, and the system may include a second arm connected to the cutting machine and elastically rotatable away from the cutting blade, positioned at an angle to the first arm and configured to clamp the cutting blade between the first and second arms, the first and second arms being adapted to press the object against the cutting blade as the object is drawn into the opening. The arm includes a wheel positioned at an end spaced away from the cutting machine, configured to roll the wheel relative to the object when the object is received into the opening. The arm is a first arm, and the device may include a second arm that is connected to a cutting machine and configured to be elastically rotatable in a direction away from the cutting blade, and which, when connected to the cutting machine, is separated from the first arm and configured to clamp the cutting blade between the first arm and the second arm, the first and second arms being adapted to press the object against the cutting blade as the object is drawn into the opening.

[0033] In some embodiments, a device for cutting an object using a cutting machine that defines a cutting blade is disclosed. The device includes an arm and a connecting member connected to the arm and capable of being attached to the cutting machine to enable elastic rotation of the arm away from the cutting blade and to bias the arm to an open position. The connecting member is configured to tilt the arm away from the cutting blade in the open position and to define an expandable opening between the cutting blade and the arm that is suitable for receiving an object and can expand to press the arm against the cutting blade as the object is pressed against the arm, thereby rotating the arm away from the cutting blade as the object is drawn into the opening.

[0034] The embodiment may include one or more of the following features: A device configured such that an arm is connected to a cutting machine via a spring configured to hold the arm away from the cutting blade in the open position, while being unloaded in the open position. When the arm is connected to the cutting machine, the arm is configured to rotate about a pivot point away from the cutting blade, and the opening expands when an object is pulled into the opening by pulling it in the direction of the pivot point. The device may include a clamp configured to clamp onto a guide of the cutting blade and an end rotatably connected to the arm. The device may include a tension spring connected to the arm and configured to connect to a guide of the cutting blade, so that when the arm is connected to the cutting machine, the rotation of the arm causes the tension spring to flex, generating a restoring force to return the arm to the open position. When the arm is connected to the cutting machine, the arm is configured to tilt at least 45° away from the cutting blade in the open position. When the arm is connected to the cutting machine, a portion of the arm defining the end of the opening is configured to be centered on the cutting plane defined by the cutting blade. The cutting machine includes a motor configured to cut an object via a cutting blade, and the device may include an actuator connected to an arm and configured to rotate the arm toward and away from the cutting blade when the arm is connected to the cutting machine, and a controller capable of receiving data from a sensor and configured to be operably connected to the actuator. The sensor is configured to sense data indicating the motor output of the motor, and the controller is configured to respond to the data to control the rotation of the arm when connected to the cutting machine and to control pressing the object against the cutting blade. The cutting machine is a chainsaw, and a cutting chain is mounted on the periphery of the guide of the cutting blade. The arm includes a first part configured to be rotatably connected to the cutting machine near the cutting blade, and a second part rotatably connected to the first part and positioned distal to the cutting blade when the first part is connected to the cutting machine, the second part may be connected to the cutting machine via the first part. The arm includes rollers located at the ends of the arm.The arm includes a first tubular section positioned on a second tubular section, and the arm is extendable by the relative expansion and contraction of the first and second tubular sections. The arm is configured to be releasably attached to a cutting machine. The device may include an actuator configured to connect the cutting machine to the arm and to elastically rotate the arm in the direction toward and away from the cutting blade.

[0035] In some embodiments, a kit is disclosed for cutting an object using a cutting machine that defines a cutting blade. The kit also includes an arm and a connecting member, the connecting member connecting the arm to the cutting machine, enabling the arm to rotate elastically away from the cutting blade, and biasing the arm to an open position when the arm is connected to the cutting machine via the connecting member. The connecting member is configured to define an expandable opening between the cutting blade and the arm, which in the open position tilts the arm away from the cutting blade, suitable for receiving an object, and which can expand to press the object against the cutting blade as the object is pressed onto the arm, thereby rotating the arm away from the cutting blade.

[0036] Embodiments may include one or more of the following features: A kit in which an arm is configured to be connected to a cutting machine via a spring, and in the open position, the spring is unloaded and holds the arm away from the cutting blade in the open position. When the arm is connected to the cutting machine, the arm is configured to rotate away from the cutting blade about a pivot point, expanding the opening by pulling the object toward the pivot point. The kit may include a clamp fixed to a guide for the cutting blade and configured such that its end is rotatably connected to the arm. The kit may include a tension spring configured to be connected to the arm and the guide for the cutting blade, such that when the arm rotates while connected to the cutting machine, the tension spring flexes and generates a restoring force that returns the arm to the open position. When the arm is connected to the cutting machine, it is configured to be angled so as to be at least 45° away from the cutting blade in the open position. When the arm is connected to the cutting machine, a portion of the arm defining the end of the opening is centered on the cutting plane defined by the cutting blade. The cutting machine includes a motor configured to cut an object via a cutting blade, and the kit may include an actuator connected to an arm and configured to rotate the arm toward and away from the cutting blade when connected to the cutting machine, and a controller configured to receive data from a sensor and suitable for operably connecting to the actuator. The sensor is configured to sense data indicating the motor output of the motor, and the controller is configured to respond to the data to control the rotation of the arm when connected to the cutting machine and to control the pressing action against the object toward the cutting blade. The cutting machine is a chainsaw, and a cutting chain is mounted around the periphery of the guide of the cutting blade. The arm includes a first part configured to be rotatably connected to the cutting machine proximal to the cutting blade, and a second part configured suitable for rotatably connecting to the first part, the second part being positioned distal to the cutting blade when the first part is connected to the cutting machine. The second part is suitable for connecting to the cutting machine via the first part. The arm includes a roller located at the end of the arm.The arm includes a first tubular section located within a second tubular section, and the arm is length-adjustable by telescopically extending and retracting the first and second tubular sections relative to each other. The arm is configured to be detachably attached to a cutting machine. The kit may include an actuator that connects the cutting machine to the arm so as to cause the arm to rotate elastically toward and away from the cutting blade. The arm includes a wheel located at the distal end of the arm of the cutting machine, the wheel being rotatable relative to the object when the object is received into the opening. The arm is the first arm, and the kit may include a second arm connected to the cutting machine and the first arm, which is elastically rotatable away from the cutting blade, and is positioned apart from the first arm so as to clamp the cutting blade between the first and second arms when connected to the cutting machine, the first and second arms being suitable for pressing the object against the cutting blade as the object is drawn into the opening.

[0037] In some embodiments, a device is disclosed for cutting an object using a cutting machine that defines a cutting blade. The device comprises an arm and means for attaching the arm to a cutting machine, the means being configured such that the arm is elastically rotatable away from the cutting blade and biases the arm to an open position, in which the arm is angled away from the cutting blade, defining an expandable opening between the cutting blade and the arm that can receive an object, and when the object is drawn into the opening, the arm rotates away from the cutting blade to expand the opening and press the object against the cutting blade.

[0038] Embodiments may include one or more of the following features: A device comprising a spring configured to be unloaded in the open position and to hold an arm away from the cutting blade in the open position. The arm, when mounted on a cutting machine, is configured to rotate away from the cutting blade about a pivot point, and the opening is expanded by pulling an object toward the pivot point. The means comprises a clamp that is clamped to a guide of the cutting blade and whose end is rotatably connected to the arm. The means comprises a tension spring connected to the arm and configured to be connected to a guide of the cutting blade, wherein the tension spring bends due to the rotation of the arm when the arm is connected to the cutting machine, generating a restoring force that returns the arm to the open position. The means comprises a tension spring connected to the arm and configured to be connected to a guide of the cutting blade, wherein the tension spring bends due to the rotation of the arm when the arm is connected to the cutting machine, generating a restoring force, and the tension spring becomes slidable within the collar when it is received by the collar. The arm, when mounted on a cutting machine, is angled so as to be at least 45° away from the cutting blade in the open position. The arm, when attached to the cutting machine, is configured such that a portion of the arm defining the end of an opening is centered on a cutting plane defined by the cutting blade. The cutting machine includes a motor configured to cut an object via the cutting blade, and the device includes an actuator connectable to the arm to rotate the arm toward and away from the cutting blade when attached to the cutting machine, and a controller capable of receiving data from a sensor and suitably operably connected to the actuator. The sensor is configured to sense data indicating the motor output of the motor, and the controller is configured to control the rotation of the arm attached to the cutting machine in response to this data, and to control the pressing of the object against the cutting blade. The cutting machine is a chainsaw, with a cutting chain mounted around the periphery of the cutting blade guide. The cutting machine is also a brush cutter. The arm includes a first portion rotatably connected to the cutting machine proximal to the cutting blade, and a second portion rotatably connected to the first portion and located distal to the cutting blade when the first portion is connected to the cutting machine, the second portion of which may be suitably connected to the cutting machine via the first portion. The arm includes a roller located at the end of the arm.The arm includes a first tubular section located within a second tubular section, and the length of the arm is extendable by the relative expansion and contraction of the first and second tubular sections. The means allows the arm to be detachably attached to a cutting machine. The means includes an actuator that connects the cutting machine to the arm so as to cause the arm to rotate elastically in the direction toward and away from the cutting blade. The arm includes a wheel located at the end of the arm distal to the cutting machine, and the wheel is rotatable relative to the object when the object is received into the opening. The arm is a first arm, the means is a first means, and the device may include a second arm connected to the cutting machine via a second means, which is elastically rotatable away from the cutting blade, and is configured to be spaced apart from the first arm so as to clamp the cutting blade between the first and second arms when attached to the cutting machine. The first and second arms are suitable for pressing the object against the cutting blade as the object is drawn into the opening.

[0039] In some embodiments, a cutting system is disclosed. The cutting system includes a cutting machine and an apparatus according to the above embodiments.

[0040] In some embodiments, kits are disclosed. The kits are suitable for forming the systems, cutting systems, and apparatus according to the embodiments described above.

[0041] The embodiments may include a combination of two or more of the above features.

[0042] Further details of these and other embodiments relating to the problem addressed in this application will become apparent from the detailed description and drawings included below. [Brief explanation of the drawing]

[0043] Please refer to the attached drawings below. [Figure 1A] Figure 1A is a perspective view of two arms connected to a guide of a cutting machine for cutting an object, in one embodiment. [Figure 1B]Figure 1B is a plan view showing the guide from Figure 1A together with the cutting machine in one embodiment. [Figure 2A] Figure 2A is a perspective view of a system for cutting an object in one embodiment. [Figure 2B] Figure 2B is a plan view of the system shown in Figure 2A in one embodiment. [Figure 3A] Figure 3A is a perspective view of a system for cutting an object in one embodiment. [Figure 3B] Figure 3B is a plan view of the system shown in Figure 3A in one embodiment. [Figure 4A] Figure 4A is a perspective view of a system for cutting an object in one embodiment. [Figure 4B] Figure 4B is a side view of the system shown in Figure 4A in one embodiment. [Figure 5A] Figure 5A is a perspective view of a system for cutting an object in one embodiment. [Figure 5B] Figure 5B is a side view of the system shown in Figure 5A in one embodiment. [Figure 6A] Figure 6A is an exploded perspective view of a device connected to the guide of a cutting machine in one embodiment. [Figure 6B] Figure 6B is a side view of the device shown in Figure 6A in one embodiment, with the device connected to a guide. [Figure 6C] Figure 6C is a cross-sectional view along section 6C-6C of Figure 6B in one embodiment. [Figure 7A] Figure 7A is a perspective view of a system for cutting an object in one embodiment. [Figure 7B] Figure 7B is a side view of the system shown in Figure 7A in one embodiment. [Figure 7C] Figure 7C is a front view of the system shown in Figure 7A in one embodiment. [Figure 7D] Figure 7D is an exploded view of the system shown in Figure 7A in one embodiment. [Figure 7E] Figure 7E is a side view of the cutting blade shown in Figure 7A in one embodiment. [Figure 7F] Figure 7F is a cross-sectional view along section 7F-7F of Figure 7E in one embodiment. [Figure 7G] Figure 7G is a side view of a part of the system shown in Figure 7A in one embodiment. [Figure 7H] Figure 7H is a cross-sectional view along section 7H-7H of Figure 7G in one embodiment. [Figure 7I] Figure 7I is a cross-sectional view along section 7I-7I of Figure 7G in one embodiment. [Figure 7J] Figure 7J is a cross-sectional view along section 7J-7J of Figure 7G in one embodiment. [Figure 7K] Figure 7K is a cross-sectional view along section 7K-7K of Figure 7G in one embodiment. [Figure 7L] Figure 7L is an enlarged view of region 7L-7L in Figure 7D in one embodiment. [Figure 7M] Figure 7M is a plan view of a cam in one embodiment. [Figure 7N] Figure 7N is a side view of a cam in one embodiment. [Figure 7O] Figure 7O is a perspective view of a portion of a two-piece clamp in one embodiment. [Figure 7P] Figure 7P is another perspective view of a portion of a two-piece clamp in one embodiment. [Figure 7Q] Figure 7Q is a side view of a portion of a two-piece clamp in one embodiment. [Figure 8A] Figure 8A is an exploded perspective view of a device for a system that cuts an object in one embodiment. [Figure 8B] Figure 8B is a side view of the apparatus shown in Figure 8A in one embodiment. [Figure 8C] Figure 8C is a cross-sectional view along section 8C-8C of Figure 8B in one embodiment. [Figure 8D] Figure 8D is a partial cross-sectional perspective view of the apparatus shown in Figure 8A in one embodiment, showing the cam fully engaged with the spring loosened. [Figure 8E] Figure 8E is a partial cross-sectional perspective view of the apparatus shown in Figure 8A in one embodiment, showing the cams pressing against each other and spaced apart in the axial direction when the spring is compressed. [Figure 9A] Figure 9A is a perspective view of the clamp of the system shown in Figure 8A in one embodiment. [Figure 9B] Figure 9B is a perspective view of the clamp shown in Figure 9A in one embodiment. [Figure 9C] Figure 9C is a perspective view of the clamp in Figure 9C in one embodiment. [Figure 10A] Figure 10A is a perspective view of a cam in one embodiment. [Figure 10B] Figure 10B is a perspective view of a cam in one embodiment. [Figure 11] Figure 11 is a perspective view of a device for cutting an object in one embodiment. [Figure 12A] Figure 12A is a side view of a system for cutting an object in one embodiment. [Figure 12B] Figure 12B is a front view of the system shown in Figure 12A in one embodiment. [Figure 12C] Figure 12C is an exploded view of the system shown in Figure 12A in one embodiment. [Figure 12D] Figure 12D is an overhead perspective view of the system shown in Figure 12A in one embodiment. [Figure 12E] Figure 12E is a downward perspective view of the system shown in Figure 12A in one embodiment. [Figure 13A] Figure 13A is an exploded view of a system for cutting an object in one embodiment. [Figure 13B] Figure 13B is a front view of the system shown in Figure 13A in one embodiment. [Figure 13C] Figure 13C is a perspective view of the system shown in Figure 13A in one embodiment. [Figure 14A] Figure 14A is a front view of a system for cutting an object in one embodiment. [Figure 14B]Figure 14B is a top view of the system shown in Figure 14A in one embodiment. [Figure 14C] Figure 14C is a perspective view of the system shown in Figure 14A in one embodiment. [Figure 15A] Figure 15A is an exploded view of a system for cutting an object in one embodiment. [Figure 15B] Figure 15B is a perspective view of the system shown in Figure 15A in one embodiment. [Figure 15C] Figure 15C is another perspective view of the system shown in Figure 15A, in one embodiment. [Figure 15D] Figure 15D is a side view of the system shown in Figure 15A in one embodiment. [Figure 15E] Figure 15E is another side view of the system shown in Figure 15A, in one embodiment. [Figure 15F] Figure 15F is a side view of the system shown in Figure 15A in one embodiment, where a nylon guard is installed instead of the debris removal extension. [Figure 15G] Figure 15G is an enlarged view of region 15G in Figure 15F. [Figure 16A] Figure 16A is an exploded view of a system for cutting an object in one embodiment. [Figure 16B] Figure 16B is a top view of the system shown in Figure 16A in one embodiment. [Figure 16C] Figure 16C is a perspective view of the system shown in Figure 16A in one embodiment. [Figure 17A] Figure 17A is a top view of a system for cutting an object in one embodiment. [Figure 17B] Figure 17B is a perspective view of the system shown in Figure 17A in one embodiment. [Figure 18] Figure 18 shows a block diagram of the arithmetic unit in an embodiment of this application. [Figure 19A] Figure 19A is a partially disassembled front perspective view of a system for cutting an object in one embodiment. [Figure 19B]Figure 19B is a front view of the system shown in Figure 19A in one embodiment. [Figure 19C] Figure 19C is a side view of the system shown in Figure 19A in one embodiment. [Figure 20] Figure 20 is a perspective view of a portion of a two-piece clamp used in the system shown in Figure 19A in one embodiment. [Figure 21A] Figure 21A is a partially disassembled front perspective view of a system for cutting an object in one embodiment. [Figure 21B] Figure 21B is a side view of the system shown in Figure 21A in one embodiment. [Figure 22A] Figure 22A is a perspective view of a device attached to a guide in one embodiment. [Figure 22B] Figure 22B is a top view of the apparatus shown in Figure 22A in one embodiment. [Figure 23A] Figure 23A is a side view of a system in one embodiment where the two-member arm is in an open position. [Figure 23B] Figure 23B is a side view of the system shown in Figure 23A in one embodiment, with the two arm members in a widely open position. [Figure 23C] Figure 23C is a side view of the system shown in Figure 23A, in one embodiment, with the two-member arm stored in the closed position. [Figure 24] Figure 24 is a perspective view of a device for cutting an object in one embodiment. [Figure 25] Figure 25 is a perspective view of a device for cutting an object according to another embodiment. [Figure 26A] Figure 26A is a perspective view of the apparatus in one embodiment. [Figure 26B] Figure 26B is an exploded perspective view of the apparatus shown in Figure 26A in one embodiment. [Figure 27] Figure 27 is a perspective view of the apparatus in yet another embodiment. [Figure 28] Figure 28 is a perspective view of the apparatus in yet another embodiment.

[0044] Detailed description of the invention

[0045] Various embodiments will be described in relation to the figures.

[0046] This specification discloses a device connected to a cutting machine to form a system for cutting an object. An advantage is that the device may be formed using an easily assembled parts kit.

[0047] In some embodiments, the device includes an arm attached to a chainsaw guide (or guide bar) and elastically rotatable around the cutting edge of the guide. For example, in a stationary position, the arm is in an open position, angled away from the guide, defining an opening for receiving the object to be cut. As the object is drawn into the opening, the arms rotate apart from each other, generating a force that counteracts the rotation, which may accelerate the cutting of the object.

[0048] In some embodiments, the device may be connected to the cutting machine via an existing guide on the cutting machine. In some embodiments, the device may be integrated with the guide or pre-fastened to the guide (including detachably) and then connected to the cutting machine by attaching the guide to the cutting machine.

[0049] This system is particularly advantageous in situations where the user's ability to apply force and / or adjust the position of the cutting machine is limited, such as when remotely cutting / pruning tree branches and leaves using a boom. However, it is understood that this system can also be used for cutting / pruning in other scenarios that do not require remote cutting. For example, the embodiments disclosed herein can facilitate cutting even when the user holds the cutting machine directly and performs the cutting without using a boom or pole. Furthermore, the embodiments disclosed herein may also be useful for cutting tree branches, pipes, conduits, and other similar objects.

[0050] Figure 1A is a perspective view of two arms 102 connected to a guide 104 of a cutting machine 106 for cutting an object 116, in one embodiment.

[0051] Figure 1B is a plan view showing the guide 104 of Figure 1A together with the cutting machine 106 in one embodiment.

[0052] In Figures 1A to 1B and the following figures, the cutting machine 106 is indicated by a connecting line (dashed line).

[0053] Guide 104 is a guide bar of a chainsaw (an example of a rotary cutting machine). A chain is attached to the guide 104 that rotates around the cutting edge 108 of the guide 104, thereby generating a cutting motion that saws (or cuts) the object. In various embodiments, it is understood that the guide and / or the cutting edge itself do not necessarily provide a sharp edge or a grinding edge. For example, a sharp edge may be provided by an element on the chain of the chainsaw to achieve sawing, and the sharp cutting edge may not be parallel to the cutting edge. In this specification, cutting edge refers to the end of the cutting machine that defines at least partially the cutting surface from which the object is cut by the cutting machine. The guide may serve to guide the cutting edge along the cutting surface. For example, the guide may be a bar or plate extending perpendicular to the surface of the object being cut and parallel to the cutting edge.

[0054] In the embodiments of Figures 1A and 1B, the arm 102 may be fixed to the guide 104 and function as a spring. In various embodiments, the arm 102 (or a projection on a plane parallel to the guide 104) may define an open position of about 45° on a plane parallel to the guide 104. In various embodiments, the arm 102 may capture, guide, and / or stabilize the object to be cut within the opening defined between the guide 104 and the arm 102. Furthermore, the open position may be associated with a resting, relaxed, or neutral state of the arm 102 (or an elastic element attached thereto) such that, even if displaced from the open position, a tendency or bias to return to the open position is created, keeping the arm 102 away from the cutting edge.

[0055] To achieve cutting, a cutting machine may rely on a force perpendicular to the surface of the object. Such a force may be a reaction force or may be generated by a reaction force. In a typical cutting machine, when the operator presses the blade against the object, a force equal to and opposite to that force is pushed back against the operator. At this time, the object is held in place so as not to move, and a reaction force is generated. If the object to be cut is accessible, the operator can maintain its position by placing a support under the object or by using an existing structure to hold the object. For example, as described, a large tree branch may be sufficiently fixed to prevent it from being pushed and moved for cutting. However, when cutting an inaccessible object (including trees or branches not firmly fixed to the ground) using a boom attached to a cutting machine, both pressing the blade against the surface of the object and holding the object to generate a reaction force may be difficult or impossible. In such situations, an arm can provide force.

[0056] In some embodiments, the arm 102 may be cylindrical. In some embodiments, the arm 102 may be spring wire or be formed from spring wire. In some embodiments, the arm 102 itself may be elastic and allow a certain amount of deformation when receiving an object. For example, in some embodiments, the arm 102 may generate deformation stress, and the restoring force associated with the deformation of the arm 102 may press the object 116 against the cutting edge 108.

[0057] A beneficial aspect is that such a restoring force may be generated by moving the cutting edge toward the object at an angle parallel to the object's surface. Such a force allows for more efficient cutting and moderately reduces the load on the motor. For example, an elastically deformable arm provides resistance or reaction to the object's movement in a direction parallel to the object's surface via resistance to rotation, eliminating the need to directly press the cutting edge perpendicular to (and into) the object's surface. The resistance or reaction force is transmitted to the object in a direction that presses the cutting edge against it (perpendicular to the object's surface). In this way, efficient cutting of hard-to-reach objects becomes possible. For example, tree branches and trunks at high, hard-to-reach locations can be cut using a boom fitted with a cutting machine equipped with the arm described here, thereby reducing or avoiding the costs, time, and dangers associated with workers climbing trees to cut these high branches and trunks.

[0058] In some embodiments, the arms do not have to be parallel. For example, arm 102 may form an angle 118 with respect to guide 104 of 0° to 90°, 10° to 80°, or about 45°, where this angle may refer to the angle between the projections of arm 102 in a plane perpendicular to guide 104 and / or cutting edge 108, as shown in Figure 1B. By arranging the arms as non-parallel in this way, interference with guide 104 and cutting edge 108 can be avoided. An advantage is that in some embodiments, it is possible to avoid the need for spacers, or relatively large spacers, to maintain clearance between arm 102 and guide 104. However, in some embodiments, arm 102 may be parallel and may be implemented with or without spacers.

[0059] In the various embodiments described herein, the arms supporting the workpiece to be cut are substantially symmetrical with respect to the guide 104 and the cutting edge 108. However, it is understood that under certain circumstances, asymmetrical arrangements and / or components may be used to achieve the objective.

[0060] It should be noted that a ramping effect can be obtained in some embodiments. The arm acts as a ramp, for example, to orient the object upward toward the blade at an angle of approximately 45°. The blade, by drawing the object toward the arm (ramp), applies an upward force to the ramp, causing the object to enter the blade.

[0061] In some embodiments, the arm may define an end 114 configured to allow the object to easily slide along or off the arm. For example, the end may be curved (e.g., arc-shaped) away from the guide (and cutting edge) to form an effective ramping surface with respect to the object. In some embodiments, the end may be a complete loop to prevent snagging on brushes or branches when the cutting machine is retracted. Such features are particularly useful when precise positioning is difficult during remote operation.

[0062] As an advantage, each arm 102 may be connected to the guide 104 substantially independently. In some embodiments, a single arm 102 may be used. This is advantageous in that it brings the cutting edge closer to the tree trunk. For example, this can generate an effective reaction force when cutting an uneven object and achieve stabilization. For example, this configuration facilitates the positioning of the guide 104 for cutting, as the operator may need to operate both arms 102 to avoid unbalanced forces acting on the object. As an advantage, a non-parallel arrangement of the arms 102 may provide further positioning advantages, as it may be necessary to bring the object into contact with the arms 102 over a wider area to avoid unbalanced reaction forces acting on the object 116. In some embodiments, as an advantage, the arms 102 may provide a reference point (e.g., an intermediate position between the two arms 102) for the operator to determine the position of the guide 104 and the cutting edge 108. Such a reference point is particularly useful when the cutting machine is remotely operated. For example, this may be particularly useful when the guide 104 and / or cutting edge 108 are not visible, are obscured, or are otherwise difficult to see for any reason (such as the object, weather, or distance).

[0063] For further clarification, where it helps to highlight different embodiments of an element, similar parts may be given different reference numerals starting with a different digit at the end, while sharing the same last two digits. For example, an arm may be referred to as arm 102 in Figures 1A and 1B, and as arm 202 in Figures 2A and 2B, respectively.

[0064] Figure 2A is a perspective view of a system 100 for cutting an object in one embodiment.

[0065] Figure 2B is a top view of the system 100 of Figure 2A in one embodiment.

[0066] Referring to Figures 2A and 2B, the system includes a cutting machine coupled to a guide, the guide being coupled to twin arms 202 by pivots 110, the twin arms 202 extending below the guide, particularly below the cutting blade defined around the guide. The arms 202 (each individually or together) are rotatably coupled to the cutting machine (e.g., the guide or other components of the cutting machine 106) via pivots 110 to receive the object between the cutting blade 108 (i.e., a portion around the guide) and the arms 202. In particular, the arms 202 may be coupled to the cutting machine so as to be elastically rotatable (and made elastically rotatable) toward and away from the cutting blade.

[0067] The arm 202 shown in Figures 2A and 2B is coupled to the cutting machine in the open position and is angled away from the cutting blade, forming an expandable opening 111 between the cutting blade and the arm 202 that is suitable for receiving an object. The arm 202 is biased to the open position so that if rotation occurs from the open position toward or away from the cutting blade, the arm 202 will return to the open position, for example, by an elastic force due to a spring bias.

[0068] In some embodiments, only a single arm may be coupled to the pivot 110. The arm 202 allows for support of the object during cutting. In various embodiments, the pivot 110 may include a first pivot to which a first arm is coupled to the guide 104, and a second pivot to which a second arm is coupled to the guide 104, the first and second pivots defining a common axis of rotation, with the guide 104 positioned axially spaced apart between them. This pivot may be normal to the guide 104.

[0069] Pivot 110 may refer to a single pivot 110 or to a pivot 110 associated with each arm 202. Each arm 202 may be connected to a guide via a corresponding articulation axis, and the articulation axis may be rotatable along a single axis (for example, an axis normal to the guide).

[0070] Each arm 202 is parallel to the others, positioned adjacent to the guide, and forms a slot between the arms. The arms 202 allow for support at multiple points on the object. However, it is understood that each arm 202 may be non-parallel in some embodiments.

[0071] As described above, the arm 202 may be connected to the cutting machine via a spring 112 that generates a spring force when the arm rotates away from the open position. The open position may be the equilibrium position, which may be defined, for example, as the spring being slack, unextended, or configured to generate virtually no restoring force, thereby holding the arm away from the cutting edge in the open position. In some embodiments, multiple springs may be configured to function as spring 112. For example, each spring may be configured to generate a restoring force, and multiple springs may not generate a net force.

[0072] In some embodiments, the spring 112 is a torsion spring positioned at the pivot and coupled to the guide and arm. In various embodiments, the spring 112, guide, and arm may be positioned to rotate around a common axis. The spring 112 may be positioned to undergo torsion around its axis. For example, in some embodiments, the torsion spring may be a coil spring. In some cases, it is understood that other types of torsion springs may be used.

[0073] Each arm 202 may be coupled to the guide via a corresponding torsion spring. The torsion spring provides resistance to rotation of the arm around the pivot. The torsion spring may define the resting (angle) position of the guide relative to the guide and the pivot by having one end of the torsion spring attached to the guide and the other end attached to the guide.

[0074] Each arm may be sandwiched between a guide and a corresponding torsion spring. This has the advantage of making it easier for the user to access, adjust, or replace the torsion spring.

[0075] In various embodiments, the arm 202 may be substantially rigid. For example, the bar may be a metal bar that is substantially more rigid than the spring 112, and may be configured such that the arm 202 itself does not experience substantial deflection, while allowing the spring 112 to deflect.

[0076] In various embodiments, the arm 202 (or its projection onto a plane parallel to the guide 104) may be configured to have a resting, loose, or neutral position at a position approximately 45° from the guide 104, around a pivot in the plane parallel to the guide 104. The arm may be configured to elastically return to the resting position even if rotated away from this resting position. For example, rotating the arm by an angle greater than the angle associated with the resting position (e.g., an angle greater than 45°) may generate a restoring force that returns the arm towards the guide. In some cases, a restoring force may be generated when the arm is pivoted to an angle smaller than the angle associated with the resting position (e.g., an angle less than 45°).

[0077] The outer end of the arm 202 may, in its neutral position, be open to a degree sufficient to generally accommodate the object to be cut (e.g., tree branches or trunks). In various embodiments, the arm 202 may be restricted from rotating more than 90° from the guide 104 and / or the cutting blade. For example, one or more detents, spacers, or other components may be provided for this purpose. It is understood that as the rotation angle of the arm 102 approaches 90° from the guide 104 and / or the cutting blade, the effect of the arm 102 on controlling the supply pressure, cutting depth, and / or motor load gradually decreases.

[0078] In various embodiments, the arm 202 may be freely rotatable toward the guide 104. This configuration prevents interference between the arm 202 and branches or other obstacles. That is, the arm 202 may rotate toward the guide 104 to reduce the possibility of the arm 202 coming into contact with these obstacles. In some embodiments, avoiding such interference with obstacles is a significant advantage.

[0079] As mentioned above, the arm may provide the force needed to cut hard-to-reach objects, such as when cutting via a boom. Specifically, the arm may be configured to rotate elastically away from the cutting blade, causing the opening to expand so that the object is drawn into the expandable opening, and / or the arm may rotate toward the pivot as the object is pressed against it. Pressing the object against the cutting blade with a force perpendicular to the surface of the object facilitates cutting the object. Furthermore, the arm is spring-loaded (or otherwise elastically rotatable) and will open (for example, to around 45° to 90°) to reduce the motor load if the object is pressed too hard against the arm, i.e., if the motor is overloaded or overloaded. In this way, for example, motor stoppage due to overload can be mitigated.

[0080] In relation to the ramping effect, the spring-loaded structure of the arm allows it to fold further from its original open position (e.g., 45°) to a more open position, such as up to 90°. The further the arm folds backward, the smaller the ramping effect becomes, and consequently, the less force is applied to the cutting blade. This reduces the load on the motor.

[0081] As used herein, an "overloaded motor" refers to a state in which a motor is subjected to an excessive load, resulting in insufficient rotational force (or torque available from the motor's operation). In other words, it is a state where the torque is less than what is required to maintain rotation against the load. An overloaded motor consumes excessive current, overheats, and is prone to failure.

[0082] One advantage is that, due to the deformation of the spring, an appropriate (reaction) force can be generated by moving the cutting blade toward the object at an angle parallel to the object's surface. This force enables more efficient cutting and moderately reduces the load on the motor. For example, it is not always necessary to press the cutting blade perpendicular to the object's surface; an elastically rotatable arm provides resistance or reaction force as it moves parallel to the object through resistance to rotation. This resistance or reaction force is transmitted to the object as a reaction force (perpendicular to the object's surface) that presses the object against the cutting blade. In this way, efficient cutting of hard-to-reach objects becomes possible. For example, high branches and trunks of trees that are difficult to access can be cut by a boom fitted with a cutting machine equipped with the aforementioned arm, reducing or avoiding the cost, time, and danger that would otherwise be incurred by workers climbing trees to cut these hard-to-reach high branches and trunks.

[0083] A useful feature is that the arm 202 (or arm 102) can be used, for example, as a stand to support the cutting tool on the ground. The spring of arm 202 (or the arm itself, for example, in the embodiment shown in Figure 1A-1B) may be sufficiently rigid to suit such an application.

[0084] Various embodiments are described below in relation to Figure 3A and the subsequent drawings. The operating principles of these embodiments may be similar in some respects to the operating principles of the embodiment shown in Figure 2A.

[0085] Figure 3A is a perspective view of a system 100 for cutting an object in one embodiment.

[0086] Figure 3B is a top view of the system 100 of Figure 3A in one embodiment.

[0087] The systems in Figures 3A and 3B include a cutting machine with arms 302 that are all elastically rotatable around a pivot 110. The arms are directly coupled to a guide 104 and rotatable around it. For example, the arms 302 may be coupled to the middle of the ends of the guide 104, where the ends may refer to the cutting edge 108 and the opposing edge. The arms 302 may be coupled to the guide 104 via a rotary joint or an external rotation joint at the pivot 110.

[0088] Resistance to rotation around the pivot 110 away from the guide 104 may be achieved by springs 112 connecting the cutting machine to the arm 302. Each of the springs 112 may be a linear spring. In various embodiments, the springs 112 may be advantageously positioned horizontally along the cutting edge 108, as shown in Figures 3A and 3B. For example, in one embodiment, the spring 112 may be a coil spring with a helical or coil axis along the cutting edge 108 or a substantial portion of the cutting edge 108. In some cases, it is understood that other types of linear springs may also be used.

[0089] The spring 112 may be connected to a part of the cutting machine rather than directly to the arm 302 and the guide 104. An advantage of this configuration is that, even when the spring 112 acts when a force is applied that opens the arm 302 during cutting, the rigidity of the guide 104 may be increased, potentially allowing for more precise cutting. In one embodiment, the spring 112 may be connected to a joint 120 that is in contact with or attached to the cutting machine. The joint 120 may be an extension, platform, flange, or other type of rigid structure. In yet another embodiment, the joint 120 may be detachably connected to the cutting machine to allow for removal and replacement.

[0090] In one embodiment, it is understood that the spring 112 may directly connect the arm 302 to the guide 104.

[0091] The arm 302 may be extended longitudinally in a direction perpendicular to the axis of rotation around the pivot 110 and away from the pivot 110. In some embodiments, the arm 302 may have a spring 112 coupled to a portion of the arm 302 located at a certain distance from the pivot 110 in a direction perpendicular to the axis, such that the distance is less than half or one-third of the longitudinal length and greater than one-sixth of the longitudinal length. In various embodiments, this longitudinal length helps to avoid interference with the pivot 110 and the joints forming the pivot connection between the arm 302 and the guide 104, while facilitating the generation of sufficient moment and torque in the workpiece during cutting. Furthermore, the distance from the pivot 110 may be determined based on the spring constant and the desired force at the distal end of the arm 302.

[0092] Each arm 302 may be connected to its corresponding spring 112 via a flange extending outward from the arm 302.

[0093] Figure 4A is a perspective view of a system 100 for cutting an object in one embodiment.

[0094] Figure 4B is a side view of the system 100 shown in Figure 4A in one embodiment.

[0095] Figures 4A and 4B show a cutting machine with a boom attached. For example, the boom may be used to lift the cutting machine to cut an object that is too high for the operator to reach, or to cut an object while maintaining a certain distance. For example, branches inside a tree can be cut from a standoff distance defined by the length of the boom by holding the boom without the operator getting in between the leaves.

[0096] As mentioned above, the system is equipped with arms 402 for applying a reaction force to the object to be cut. Each arm 402 may be fixedly or rigidly coupled to a corresponding connecting bar 122. The connecting bar 122 may be rotatably connected to the system's guide 104, for example, midway between the cutting edge 108 and the opposite edge of the guide 104. Furthermore, the connecting bar 122 may be coupled to a spring-loaded member 124 coupled to the cutting machine. In various embodiments, a joint 120 may be used to connect the spring-loaded member 124 to the cutting machine.

[0097] The connecting bar 122 may be coupled to member 124 and arm 402 at its opposite ends 126A, 126B, or at the portion of the connecting bar corresponding to the position where the connecting bar 122 is connected to guide 104. This allows forces applied to the connecting bar 122 via member 124 to be transmitted as moments to arm 402 via the connecting bar 122. A benefit is the acquisition of a torque multiplication effect (mechanical advantage). For example, torque coupling may be achieved through the reaction force applied to the object being cut.

[0098] At end 126B, the connecting bars 122 may be attached or connected through the openings 130 of each connecting bar 122 via corresponding fasteners 128 positioned at the first position of the corresponding connecting bar 122. In some embodiments, the fasteners 128 may form a rotary joint so that the arm 402 can freely externally rotate in a plane perpendicular to the axis of rotation. The axis of rotation may be a common axis passing through the corresponding openings 130 of the two connecting bars 122 on either side of the guide 104.

[0099] At end 126B, the connecting bar 122 may further be attached to or connected to the connecting bar 122 through openings 132 in each connecting bar 122 via corresponding fasteners 134 located at second positions on each connecting bar 122. It is advantageous to connect each arm 402 to two positions on the corresponding connecting bar 122, so that the arm 402 is fixed or held in place relative to the corresponding connecting bar 122 via two external joints of the connecting bar 122.

[0100] In various embodiments, the fastener 134 may be detachable or detachable so that the arm 402 can be selectively rotated around the fastener 128. The fastener 134 may be a spring pin knob with a large knob or gripping surface configured for easy user operation. For example, this may allow one or more arms 402 to be retracted to prevent interference with the object. In Figure 4A, the arm 402 shown with the parts unfolded is in the retracted position. This allows the arm 402 to be selectively operated. When the arm 402 is in the retracted position, the arm 402 does not operate, and the system can be used without interfering with the movement or positioning of the guide 104 until the arm 402 supports cutting. The arm 402 may be held in the retracted position by friction in the corresponding joint formed by the fastener 128. Such friction is sufficient as the force applied to the arm 402 in the retracted position if the force is not very large, for example, the force related to the weight of the arm 402. On the other hand, when the arm 402 is in an open configuration and engaged with an object, the force on the arm 402 is increased by the reaction force generated by the object. Therefore, in the open configuration, when the arm 402 is engaged with an object, the arm 402 is supported by fasteners 128 and 134 that hold it in a fixed state relative to the connecting bar 122.

[0101] In some embodiments, it is understood that the fastener 128 permanently attaches the connecting bar 122 to the arm 402, for example, by an integrated joint. In such cases, the fastener 134 is not necessarily required to secure the arm 402 and may not be provided, or the fastener 134 may be provided to ensure further rigidity and strengthen support of the arm 402.

[0102] In some embodiments, the joint 120 abuts against the rear of the cutting machine but is not attached to the device and may be substantially held in place by friction. For example, a spring force acting on the joint 120 by member 124 may press and hold the joint 120 against the rear of the cutting machine. It is also understood that in some embodiments, the joint 120 may be additionally or alternatively attached to the cutting machine or secured with a clamp.

[0103] The spring 112 may define the resting position of member 124. Moving member 124 away from the resting position may generate a restoring force in the opposite direction. Member 124 is slidably engaged with the opening of the joint 120 and fixedly coupled to the joint bar 122, thereby restricting member 124 to move along a single direction. This direction may be aligned with the cutting blade 108. Resistance to sliding motion is provided by the spring 112. Member 124 may be held within the corresponding spring 112. The spring 112 may abut against the joint 120, preventing it from sliding through the joint 120. The spring 112 may be made larger than the opening into which member 124 is inserted. For example, if the spring 112 is a coil spring and its diameter is larger than the opening, the coil spring (linear coil spring) may rest on the joint 120, and it may be necessary to compress the spring in order for member 124 to slide within the opening and away from the guide 104.

[0104] Although both arms 402 were described in the preceding description, it will be understood that in some embodiments, each arm 402 can be operated independently and selectively, for example, as shown in the embodiments of Figures 4A and 4B. In some embodiments, the arms 402 may be connected for common operation, for example, a fastener for engaging with a single joint may be replaced with a long fastener configured to engage with both joints 122 simultaneously (for example, fasteners 128, 134 may be replaced with a pair of long fasteners that cross under the guide 104 and connect the arms 402 together).

[0105] Figure 5A is a perspective view of a system 100 for cutting an object in one embodiment.

[0106] Figure 5A is a perspective view of a system 100 for cutting an object in one embodiment.

[0107] Figure 5B is a side view of the system 100 in Figure 5A in one embodiment.

[0108] In the embodiments of Figures 5A and 5B, actuators 136 (such as motors) are used instead of springs, which are electronically controlled by a controller 137 to drive the actuators 136 to move the arm 502 and / or provide operational data to the controller. The actuators 136 may be configured to elastically rotate the arm 502 toward and away from the cutting edge. In various embodiments, linear actuators, electric motors, hydraulic motors, pneumatic motors, and other types of actuators may be used. The controller 137 may be connected to a sensor that senses data indicating motor output or actuator output, and may be configured to perform control (or prevent control, and / or other general control) that causes rotation of the arm in accordance with the data, and to provide feedback control that controls the action of pressing the object against the cutting edge. For example, the sensor may sense the motor output of the cutting machine's motor (e.g., a saw motor). In some embodiments, the sensor may measure the current consumed by the saw motor. This makes it possible to control the motor based on the magnitude and characteristics of the current received by the saw motor. Each actuator 136 may be connected to a corresponding arm 502. In some embodiments, a single actuator 136 may be provided for both arms 502, with or without additional motors. Each actuator 136 can be operated independently. In some embodiments, the actuators 136 may be coupled for common operation.

[0109] The arm may be controlled (by feedback control) based on data indicating motor output acquired by sensors or the like, and the cutting force applied to the object may be controlled. In various embodiments, the cutting force may be determined or estimated based on the motor output. Therefore, in various embodiments, the motor output may be controlled. In various embodiments, the arm may be controlled to increase or decrease the force applied to the object to be cut based on such data. In various embodiments, the arm may be controlled to ensure efficient motor operation, avoid motor overload, extend motor life, and extend battery life.

[0110] In some embodiments, if the motor approaches its maximum load during cutting, the arm 502 may open further 90° to reduce the cutting pressure on the guide 104 (and the cutting edge 108). This can reduce the power consumption of the cutting machine's motor.

[0111] In some embodiments, during operation, data generated by the sensor may be used to indicate or determine an overload of the saw motor. In response to such an overload, or upon receiving an overload signal, the actuator operates to open the arm 502, i.e., to move it away from the object at a larger angle, or to reduce the force applied to the arm. For example, this mimics the effect of the spring-loaded arm described above.

[0112] In some embodiments, the arm 502 may be spring-loaded. When the workpiece is sufficiently pressed onto the arm 502, the cutting machine motor may begin to stop due to overload. At the start of the stop, or in the stage before it stops, the actuator 136 can be controlled to rotate the arm 502 away from the workpiece, i.e., the arm 502 can be rotated open. This action can reduce the cutting pressure on the guide 104 and / or prevent or mitigate the stopping of the cutting machine motor. In various embodiments, the arm 502 may be controlled by a controller based on the measurement or detection of a physical phenomenon indicating the power consumption by the motor. In some embodiments, the arm 502 being spring-loaded can reduce the cutting pressure and mitigate the occurrence of a stop.

[0113] In some embodiments, the arm 502 may be spring-loaded. When the workpiece is sufficiently pressed onto the arm 502, the cutting machine motor may begin to stop due to overload. At the start of the stop, or in the stage before it stops, the actuator 136 can be controlled to rotate the arm 502 away from the workpiece, i.e., the arm 502 can be rotated open. This action can reduce the cutting pressure on the guide 104 and prevent or mitigate the stopping of the cutting machine motor. In various embodiments, the arm 502 may be controlled by a controller based on the measurement or detection of a physical phenomenon indicating the power consumption by the motor. In some embodiments, such factors can reduce the cutting pressure and mitigate the occurrence of a stop.

[0114] Figure 6A is an exploded view of the device coupled to the guide 104 in one embodiment.

[0115] Figure 6B is a side view of the device shown in Figure 6A in one embodiment, with the device coupled to the guide 104.

[0116] Figure 6C is a cross-sectional view along the 6C-6C section of Figure 6B in one embodiment.

[0117] Referring to Figures 6A to 6C, the arm 602 is connected to the guide 104 via a single spring 112. The spring 112 can be fixed to the arm 602 at a first end (first terminal end) away from the guide 104, and the arm 602 is provided with an integrated spring cap 140 to receive this end. For example, the spring cap 140 is integral with the rest of the arm 602, extends axially toward the guide side as a flange, and forms a hollow or cavity that houses the spring 112. The spring 112 can be fixed to the mounting hub 138 at a second end, for example, a second terminal end, closer to the guide 104.

[0118] The elongated bolt 142 engages with and is held by the arm 602 (or its spring cap 140), the spring 112, the mounting hub 138, and the guide 104. For example, the illustrated hardware can be used. The hardware may include a wing nut, a machine screw (e.g., a Phillips head screw), a retaining ring (an external retaining ring), a bushing, and a pin (a slotted spring pin shown in the exploded view between the guide and the mounting hub 138). In various embodiments, the elongated bolt 142 is held or connected to the arm 602 and is held or coupled to the spring for elastic action, enabling elastic action. For example, the elongated bolt can hold the arm assembly (including the mounting hub 138, spring 112, spring cap 140, sleeve, washer, and retaining ring) together on the guide 104.

[0119] The guide 104 is provided with multiple openings, allowing for the selective placement of the pivot 110.

[0120] Figure 7A is a perspective view of a system 100 for cutting an object in one embodiment.

[0121] Figure 7B is a side view of the system 100 shown in Figure 7A in one embodiment.

[0122] Figure 7C is a front view of the system 100 of Figure 7A in one embodiment.

[0123] Figure 7D is an exploded view of the system 100 in Figure 7A in one embodiment.

[0124] Figure 7E is a side view of the cutting blade shown in Figure 7A in one embodiment.

[0125] Figure 7F is a cross-sectional view along the 7F-7F section of Figure 7E in one embodiment.

[0126] Figure 7G is a side view of a part of the system 100 in Figure 7A, according to one embodiment.

[0127] Figure 7H is a cross-sectional view along the 7H-7H section of Figure 7G in one embodiment.

[0128] Figure 7I is a cross-sectional view along the 7I-7I section of Figure 7G in one embodiment.

[0129] Figure 7J is a cross-sectional view along the 7J-7J section of Figure 7G in one embodiment.

[0130] Figure 7K is a cross-sectional view along the 7K-7K section of Figure 7G in one embodiment.

[0131] Figure 7L is an enlarged view of the 7L-7L region in Figure 7D in one embodiment.

[0132] Figure 7M is a plan view of the dog 146 in one embodiment.

[0133] Figure 7N is a side view of the dog 146 in one embodiment.

[0134] Figure 7O is a perspective view of a portion of a two-piece clamp 144 in one embodiment.

[0135] Figure 7O is a perspective view of a portion of a two-piece clamp 144 in one embodiment.

[0136] Figure 7O is a perspective view of a portion of a two-piece clamp 144 in one embodiment.

[0137] Figure 7P is another perspective view of a portion of the two-piece clamp 144 in one embodiment.

[0138] Figure 7Q is a partial side view of a two-piece clamp 144 in one embodiment.

[0139] The system 100 shown in Figures 7A to 7L can be a quick-connect system. For example, it allows an operator to quickly attach / install the arm 702 to the guide 104 and to quickly detach / release the arm 702 from the guide 104.

[0140] The two-piece clamp 144 defines a first member positioned on one side of the guide 104 and a second member positioned on the opposite side. The first and second members of the clamp 144 are configured to engage with each other via the guide 104, clamping the guide from both sides. This fixes or partially holds the first and second members of the clamp 144 to the guide 104.

[0141] As an advantage, in some embodiments, the first and second members of the clamp 144 may be configured to engage or lock with each other through openings 148 or through holes formed in the guide 104, so that one member can access the other member. For example, this makes it possible to easily align both parts across the guide 104. For example, the opening 148 may consist of two openings or two rectangular openings formed in the guide 104. The user can insert the parts into these openings and press them together so that the engaging or hooking portions interlock and form the clamp 144. In some embodiments, a projection of the first member passes through the guide 104 and engages with a corresponding recess of the second member, and a projection of the second member passes through the guide 104 and engages with a corresponding recess of the first member.

[0142] In some embodiments, the clamp 144 may be further held in place by engagement with or attachment to the guide 104. For example, in Figures 7A to 7L, each part of the clamp 144 is configured to house a corresponding dog 146 (or detent) and to hold (lock) its position while allowing it to rotate around a fixed axis relative to the part. Each dog 146 extends along the fixed axis and may define a cylindrical or tubular shape. Each dog 146 includes a corresponding arcuate or partial circular outer circumference in a cross section perpendicular to the fixed axis and may define a partial circular portion and a portion that is flat or within a partial circular area relative to the partial circular portion (i.e., a range that falls within a circle formed by extending the partial circular portion). The partial circular portion of the dog 146 may be complementary to a corresponding recess 150 or groove formed in the guide 104. Each dog 146 is adapted to engage with the corresponding recess 150 by fitting its partial circular portion into the recess 150. In this engaged state, the clamp 144 is further secured by the dog 146. Each dog 146 can be released from the guide 104 by rotating its partially circular portion away from the recess 150 and directing the portion that does not fit within the partially circular portion toward the recess 150.

[0143] In various embodiments, the recess 150 may have a partially circular cross-section and / or may be located adjacent to the opening 148.

[0144] The use of the dock 146 has the advantage of allowing the opening 148 to be set larger than necessary, which, for example, eliminates the need for precise machining and positioning, improving ease of manufacture and facilitating deployment, such as on-site installation.

[0145] When attached to the guide 104, each piece of the clamp 144 is configured to form a pivot joint with the corresponding arm 702. The two pieces of the clamp 144 define two independent and separate openings (see the openings forming the pivot 110) for engaging with corresponding elongated shafts 152 located on either side of the guide 104. Each shaft 152 is independent of the other shaft and is rotatable or swivelable about an axis passing through the opening. Each shaft 152 engages with a corresponding spring 112 (e.g., a torsion coil spring) that generates force in response to rotation and may be slidably engaged with a sleeve 154 (or shaft) extending outward from the corresponding arm 702. A bushing 156 may be provided. In various embodiments, the bushing 156 is a slippery bushing (e.g., a nylon bushing) and is adapted to limit friction between the rotatable arm 702 and the (fixed) spring cap 140. In the illustrated example, a small bushing is provided that engages with the end of the sleeve 154 and the inside of the spring cap 140 to reduce friction between these two parts. The spring 112 directly creates torsional resistance between the arm 702 and the spring cap 140. The spring cap 140 can accommodate the corresponding spring 112. Each spring 112 has an opposite end that engages with the spring cap 140 and the arm 702, defining the resting position of the arm 702. For example, the resting position of the arm 702 may be rotated 45° (angle 170) from the guide 104. In various embodiments, the arm 702 is rotatable up to 90° from the guide 104.

[0146] Each shaft 152 may have a corresponding key path configured to engage with a key 158. The shaft 152 may pass through an opening in the spring cap 140 and be secured by a nut or retainer cap to prevent the shaft 152 from moving axially out of the opening in the spring cap 140. The key 158 may be complementary to a portion of the opening and may be held in place by a nut or retainer cap. The key 158 may engage with both the spring cap 140 and the shaft 152 simultaneously to prevent relative rotation between them. For example, the key 158 may be sized to stop the rotation of the shaft 152 relative to the spring cap 140. For example, the key 158 may be polygonal, cubic, or cubic in shape.

[0147] As shown in Figures 7M to 7N, the dog 146 has a Philister head.

[0148] As shown in Figures 7O to 7Q, the component may include a hook-shaped projection (e.g., an L-shaped projection) and a slot or groove for receiving the projection from the opposite component. The projection and slot may be stacked on top of each other. A pocket (e.g., a slot or groove) may be formed at the end of the component and configured to receive the dog 146. A circular opening defining a hole may be formed below the projection to receive the shaft 152.

[0149] Figure 8A is an exploded view of a device for a system for cutting an object in one embodiment.

[0150] Figure 8B is a side elevation view of the apparatus shown in Figure 8A in one embodiment.

[0151] Figure 8C is a cross-sectional view along section 8C-8C of Figure 8B in one embodiment.

[0152] Figure 8D is a perspective cross-sectional view of the apparatus shown in Figure 8A in one embodiment, showing that the spring is in the relaxed position and the cam is fully engaged.

[0153] Figure 8E is a perspective cross-sectional view of the apparatus shown in Figure 8A in one embodiment, showing that the spring is in the compressed position and the cams are pushing each other upward, causing axial separation.

[0154] Figure 9A is a perspective view of the clamp 244 of the system shown in Figure 8A in one embodiment.

[0155] Figure 9B is a perspective view of the clamp 244 in Figure 9A in one embodiment.

[0156] Figure 9C is a perspective view of the clamp 244 in Figure 9C in one embodiment.

[0157] Figure 10A is a perspective view of the cam 164A in one embodiment.

[0158] Figure 10B is a perspective view of the cam 164B in one embodiment.

[0159] Embodiments in Figures 8A to 8C illustrate another type of quick coupling for holding retaining arms 802 on guide 104. The arms 802 may be coupled to one another so as to rotate in common about pivot 110. The arms 802 may also rotate elastically about pivot 110 by a spring force supplied by spring 112, which may be a linear coil spring configured to compress along the axis of rotation of the arms 802 as the arms 802 are rotated outward from guide 104.

[0160] The arm 802 may have wings extending axially outward to provide a lower surface for engaging with the object to be cut and for engaging with other parts, as will be described later.

[0161] Two separate components positioned on either side of the guide 104 may form a clamp 244. Each component of the clamp 244 may have projections and recesses (or slots) and be configured to engage with an opposing component through openings formed in the guide 104. These openings are formed around the pivot 110 and define the axis of rotation of the arm 802.

[0162] Each component of the clamp 244 may define a substantially circular or cylindrical base 160. The aforementioned projections and recesses, or slots, may be formed in the base 160. A corresponding grooved shaft 166 suitable for engaging with a corresponding female receiver may extend from the cylindrical base 160 of each component. For example, this allows for common rotation with the shaft 166. The shaft 166 may be hollow, allowing other shafts to pass through its interior. The hollow interior of the shaft 166 may extend from the shaft 166 to the opposite side of the base 160, i.e., the hollow interior may pass through the component to allow rotational engagement with other members.

[0163] Each component of the clamp 244 may be slidably engaged with the corresponding arm 802 by the grooved shaft 166 of each component slidably engaging with an opening formed in the arm 802. This allows the arm 802 to rotate around the guide 104.

[0164] The first member of the clamp 244 may engage with the second member of the clamp 244 located on the opposite side of the guide 104. The retainer 162 may be in the form of a strip, for example, having a projection complementary to the slots of the clamp 244's components, and may engage with at least one component to prevent subsequent separation during use or operation. In some embodiments, the components of the clamp 244 may be configured to engage with each other via hook-shaped slots and complementary projections suitable for engagement, for example, a cubic projection of one component may be suitable for engaging with an L-shaped slot of the opposite component. The retainer 162 may engage with the hook-shaped slot, for example, an L-shaped slot, to prevent opening into the slot and prevent the projection from coming out of the slot.

[0165] On each side of the guide 104, each grooved shaft 166 may further slidably engage with cams 164A, 164B. On each side of the guide 104, each cam or cam assembly may be formed by cams 164A, 164B. Cams 164A, 164B may have or be formed such that their rotational motion imparts axial, linear motion to the engaging part (the part that engages with the cam assembly), for example, along the axis of rotation of the arm 802. Such linear motion may also be subject to spring resistance. Cam 164A may engage with the corresponding cam 164B. Cams 164A, 164B may each define substantially triangular or conical teeth and recesses, be oriented axially, and be configured to engage with each other along the axial direction (i.e., along the axis of rotation). The teeth and recesses of cams 164A, 164B may define cam surfaces that allow the cams to ramp with each other. As shown in Figures 8D and 8E, when cam 164A rotates, causing cam 164A to slip from cam 164B and / or disengage, cams 164A and 164B separate axially from each other. Cams 164A and 164B may each define a cylindrical housing, and may be configured such that their teeth and recesses engage with each other, for example, by sliding together.

[0166] The cam 164A may have a flange or wing extending radially outward from its center position or axis of rotation. As the cam 164A rotates, the flange may engage with the arm 802, preventing the movement of the arm 802 and / or moving the arm 802 to a stationary position defined by the stationary position of the cam 164A. For example, the cam 164A may engage with the wing of the arm 802 or the lower surface of that wing. In this way, the position of the cam 164A may be associated with the position of the arm 802.

[0167] The cam 164B may define a grooved opening in the clamp 244 that is complementary to the shaft 166, and receive the shaft 166. This may restrict the movement of the cam 164B together with the clamp 244. For example, the cam 164B may be clamped in the guide 104 together with the clamp 244.

[0168] Spacer 168 may engage with cam 164B at its axial outer end. Spacer 168 may have an opening for receiving a spring-loaded bolt 142. The bolt 142 may slidably engage with spring 112. Spring 112 may be held on the bolt 142 by the head of the bolt 142 and spacer 168 (opposite end). The bolt 142 may be slidable through the guide 104 through spacer 168, cams 164A, 164B (on both sides of guide 104), arm 802 (on both sides of guide 104), and the opening in clamp 244. The bolt 142 is held by a wing nut provided on the end of the bolt 142 opposite to the head. During operation, the bolt 142 may not rotate substantially, but instead move axially relative to spacer 168 to deform spring 112 and create elasticity in the rotation of arm 802.

[0169] As arm 802 rotates outward from guide 104, cam 164A rotates with arm 802, but cam 164B does not rotate because it is held in place by guide 104. Cams 164A and 164B rotate relative to each other. Such rotation causes slippage and / or disengagement between cams 164A and 164B. Cam 164B moves axially away from cam 164A by pushing spacer 168 axially outward. A spring 112 acts on spacer 168, one end of which is prevented from expanding by a bolt 142. Spacer 168 then transmits a reaction force generated by the spring force of spring 112 to cam 164B, preventing the aforementioned relative rotation and thereby preventing the rotation of arm 802. As a result, arm 802 rotates elastically around guide 104.

[0170] Figure 11 is a perspective view of a system for cutting an object according to one embodiment.

[0171] The system in Figure 11 utilizes a two-piece clamp 344 to which the arms are connected. This two-piece clamp surrounds the guide 104 (e.g., within a sleeve) and clamps onto the guide 104 to form a bracket. The clamp 344 may enable retrofitting to a conventional guide 104 (an existing guide) even if there are no pre-existing openings or holes for connection. For example, the clamp 344 may provide one or more openings for connection (e.g., a series of holes or openings that are stacked or oriented vertically). In various embodiments, the clamp 344 may consist of two rectangular annular parts for receiving the guide into the clamp 344. For example, each part may have a substantially U-shaped structure. The parts may be complementary to each other. In various embodiments, the two-piece clamp 344 may have a high-friction inner surface to prevent slippage on the guide 104.

[0172] In various embodiments, the openings of the clamp 344 may be spaced apart so that the clamp 344 does not crush or fix the chain around the guide 104.

[0173] In some embodiments, the clamp 344 may have a high-friction surface to frictionally engage with the guide 104 to prevent slippage between the clamp 344 and the guide 104. For example, the inner surface (the inner surface of the U-shaped structure of the clamp 344) may be a high-friction surface.

[0174] The various systems for cutting objects described may include an arm attached to a chainsaw-type rotary cutting machine. It is understood that embodiments of the object cutting system may be formed in conjunction with other types of cutting machines. Further explanation may include grinders, cutters, or brush saws. In such cutting machines, cutting is performed by a substantially circular blade (defining the cutting edge) rotating around a main spindle. As referred to herein, the guide of a grinder or brush cutter may refer to a central assembly or structure (e.g., a disc guard) to which the rotating cutting blade is attached, similar to the guide bar of a chainsaw. For example, such a central assembly or structure may not rotate substantially (at least in comparison to the cutting edge 108).

[0175] In some embodiments, a single-piece clamp may be used. The single-piece clamp may have a through-opening. The single-piece clamp may be frictionally secured on the guide bar via a high-friction connection. For example, the single-piece clamp may have a tipped set screw for frictional engagement with the guide bar.

[0176] Figure 12A is a side and front view of an object cutting system according to one embodiment.

[0177] Figure 12B is a front view of the system shown in Figure 12A.

[0178] Figure 12C is an exploded view of the system shown in Figure 12A.

[0179] Figure 12D is an overhead perspective view of the system shown in Figure 12A.

[0180] Figure 12E is a downward perspective view of the system shown in Figure 12A.

[0181] Referring to Figures 12A to 12E, the cutting machine 206 is fitted with an arm 902 used to apply force to the object 116 to be cut by the cutting blade 108 of the cutting machine 206. The cutting machine 206 may be a grinder, cutter, brush cutter, brush saw, or other type of rotary cutting machine.

[0182] The arm 902 is coupled to the fence 172 (a connecting bar similar to the one used to connect to the cutting machine) via two (at least or only) spatially separated (or misaligned) fasteners 128, 134. The fence 172 may function as a guard. Each fastener 128, 134 may independently form a pivot joint between the arm 902 and the fence 172. Thus, when both fasteners are engaged, the arm 902 is fixed against relative (or co-movement) movement with the fence 172. The fasteners 134 may be locking pins. In various embodiments, the fasteners 134 are removable by the user or operator, and engagement between the arm 902 and the object 116 can be disengaged or prevented by rotating the arm 902 away from the cutting blade 108 (for example, as previously described in the embodiments of Figures 4A and 4B). If desired by the user or operator, the arm 902 can be made to move in conjunction with the fence 172, or substantially the same movement, or to rotate in conjunction with the fence 172, by rotating the arm 902 around the pivot joint defined by the fastener 128 and engaging the fastener 134.

[0183] The arm 902 is attached to the guide 104 via a fence 172 (which may function as a guard) and is configured to rotate elastically around the pivot 110 together with the fence 172, thereby applying force to the workpiece 116. In particular, as the workpiece 116 moves relative to the cutting blade 108, the arm 902 may rotate away from the cutting blade 108. In various embodiments, a spring 112, which may be a torsion coil spring, may press the arm 902 against the workpiece 116, generating a spring force that presses the workpiece 116 against the cutting blade 108. In various embodiments, this spring is sufficiently flexible to rotate and absorb the impact when the arm 902 is subjected to a sufficiently large cutting force, thereby reducing the impact of cutting, tool recoil, and tool breakage. As shown in Figure 12A, an example of the reaction force applied to the workpiece 116 may have a component directed toward the cutting blade 108.

[0184] The arms 902 may be configured to extend sufficiently perpendicular to the blade on both sides of the guide 104 and the blade. For example, it may not be necessary to provide two separate arms on either side of the cutting blade 108. In various embodiments, the arms 902 may be positioned to extend approximately equal lengths on both sides of the cutting blade 108.

[0185] In various embodiments, the arm 902 may be arc-shaped, curved, convex, and / or partially circular. For example, the arm 902 may be positioned at a distance from the cutting blade 108, have a partially circular shape based on a circle that is concentric with the blade and has a larger radius than the blade, and be configured to form a surface that is generally aligned with the cutting blade 108 while maintaining a distance from the cutting blade 108 in at least part of it.

[0186] In various embodiments, the fence 172 may be sized based on the operational size available to the user. For example, a small fence 172 may be used. The fence 172 may be configured to form a hood that covers part of the blade to prevent unintended cuts by the blade. The fence 172 is particularly useful in remote positioning (for example, when done via a boom), as it can be difficult for the user to position the cutting machine 206 while avoiding objects that should not be cut and to ensure safety (e.g., preventing injury to the operator's fingers).

[0187] Figure 13A is an exploded view of a system for cutting an object in one embodiment.

[0188] Figure 13B is a front view of the system shown in Figure 13A in one embodiment.

[0189] Figure 13C is a perspective view of the system shown in Figure 13A in one embodiment.

[0190] The arm 1002 is elastically attached to the cutting machine 206 via a spring 112 for elastic rotation of the arm 1002. The arm 1002 may include wings of a wide fence and be configured to assist in cutting by pressing against a wider portion of the object 116.

[0191] The plate 174 is fixed to the cutting machine 206, forming a space between the blade and the plate 174. In some embodiments, the plate 174 may be configured to position and hold the object 116 for cutting.

[0192] Figure 14A is a front view of a system for cutting an object in one embodiment.

[0193] Figure 14B is a top view of the system shown in Figure 14A in one embodiment.

[0194] Figure 14C is a perspective view of the system shown in Figure 14A in one embodiment.

[0195] The arms 1102 may be connected to a guide 104 (e.g., a disc guard). The twin arms 1102 may provide a rigid anvil for cutting material. For example, the arms 1102 may be rigidly coupled to the guide 104. The object to be cut may come into contact with the arms 1102. The arms 1102 can prevent the object from moving. During cutting, the object may be pressed against one or more arms 1102 (similar to an anvil). The arms 1102 provide reaction forces. Reaction forces can be generated by the deformation of the arms 1102. In various embodiments, the system may be spring-free, or the mounting system itself may be spring-free.

[0196] Figure 15A is an exploded view of a system for cutting an object.

[0197] Figure 15B is a perspective view of the system shown in Figure 15A.

[0198] Figure 15C is another perspective view of the system shown in Figure 15A.

[0199] Figure 15D is a side view of the system shown in Figure 15A.

[0200] Figure 15E is another side view of the system shown in Figure 15A.

[0201] Figure 15F is a side view of the system in Figure 15A in one embodiment, showing that the deformable guard 179 has been replaced by an extension 177 for debris removal.

[0202] Figure 15G is an enlarged view of region 15G in Figure 15F.

[0203] Referring to Figures 15A to 15E, the arm 1202 is rigidly connected to the fence 272 via a center plate 176 (or mounting plate). The fence 272 may also function as a rear guard. The assembly of the arm 1202, center plate 176, and fence 272 is mounted to the cutting machine guide 104 via a spring-loaded pivot joint (e.g., by a torsion spring) that generates a reaction force, and is configured to assist in the cutting operation.

[0204] The center plate 176 is attached to the cutting machine via a standoff 178. For example, the center plate 176 may be fixed or rigidly connected to the standoff 178. In some embodiments, as shown in Figures 15B to 15C, the standoff 178 is attached to an elongated rod of the cutting machine, which may be a guide for the cutting machine. A guard 180 may be positioned adjacent to the standoff 178 to prevent parts from interfering with the rod. The guard 180 may function as a guard against brushes and cutting debris. For example, the guard 180 has the advantage of effectively reducing the accumulation of cutting debris around (e.g., around) the standoff 178 during or caused by the cutting operation.

[0205] The center plate 176 defines an extension 177 positioned to move the cutting piece away from the cutting machine, the cutting blade, and / or guide. This shelf extends at the end of the cutting blade to cover the cutting blade and the adjacent surface (the cutting blade surface), and is positioned to push aside the cutting piece moving toward the end due to the rotational motion of the cutting blade. In various embodiments, the extension 177 may be a step and / or projection. The extension 177 may be angled to guide the cutting piece away from the cutting blade.

[0206] The extension 177 is angled outward, so that the rotation of the saw causes the grass scraper to cut the grass and push it outwards towards the outer edge of the saw.

[0207] In some embodiments, as shown in Figures 15F and 15G, a deformable guard 179 or a scraper made of a material such as nylon or UHMW is mounted under the flat center plate in the same position and provides a similar function.

[0208] The fastener 134 can engage the arm 1202 with the center plate 176. In various embodiments, the fastener 134 may be a removable fastener, such as a locking pin or a spring-loaded pin. Figure 15B shows the state in which the fastener 134 is engaged with the center plate 176 but not with the arm 1202. The arm 1202 may be rotated away from the cutting blade 108, in which case (as shown in Figure 15B) the opening of the arm 1202 coincides with the opening of the center plate 176 engaged with the fastener 134. This allows the fastener 134 to be engaged with both the arm 1202 and the center plate 176 simultaneously, fixing the arm 1202 in the open position.

[0209] The fence 272 may be connected to the center plate 176 independently of the arm 1202. The fence 272 may also be connected to the center plate 176 via an angled rotating block 182. In some embodiments, the fence 272 may be rigidly fixed to the center plate 176. The angled rotating block 182 can rotate the fence 272 relative to the center plate 176. In various embodiments, this rotation may be performed along an axis not parallel to the axis on which the arm 1202 rotates around the center plate 176. A locking pin on the angled rotating block 182 can hold the fence 272 (or guard) in an open or closed position. By rotating the fence 272, it can be moved so as not to interfere with the user's operation.

[0210] In some embodiments, the fence 272 may be provided with one or more openings for discharging debris. For example, the opening slots may extend along the perimeter of the fence 272 or be distributed so that debris such as cut grass is discharged radially to the outside through the guard.

[0211] The spring 112 may be engaged with or rigidly connected to the spring cap 140. Since the spring cap 140 is keyed and complementary to the shaft 152, the key engaged with the spring cap 140 and the shaft 152 ensures that the spring cap 140 and the shaft 152 rotate together. The shaft 152 may also engage with and rotate together with the arm 1202. If one end of the spring 112 remains fixed to the center plate 176 and the other end is connected to rotate together with the arm 1202, such rotation of the arm 1202 may generate a torsional force in the spring 112.

[0212] Figure 16A is an exploded view of a system for cutting objects in one embodiment.

[0213] Figure 16B is a top view of the system shown in Figure 16A.

[0214] Figure 16C is a perspective view of the system shown in Figure 16A.

[0215] Referring to Figures 16A to 16C, the fence 272 may be connected to the center plate 176. The arm 1302 may be directly connected to the central guide of the cutting machine and not connected to the center plate 176.

[0216] The arm 1302 may include a first section extending radially outward from the hub of the cutting machine, and a second section perpendicular thereto and parallel to the cutting blade 108 at an angle between 18° and 25°.

[0217] The fence 272 and center plate 176 may be configured to form a groove 184 between the fence 272 and the hub or arm 1302, having sufficient width to discharge any debris that bypasses the cutting process. For example, the groove 184 may be defined by the arc-shaped portions of the fence 272 and center plate 176.

[0218] Figure 17A is a top view of a system for cutting objects in one embodiment.

[0219] Figure 17B is a stereoscopic view of the system shown in Figure 17A.

[0220] The system may include a center plate 176 connected to a fence 272 having extensions that form arms around at least a portion of the cutting blade 108. For example, in various embodiments, the system may not have individual arms connected to the center plate 176 as described above.

[0221] The scope of this technology is thought to include various other embodiments. For example, in one embodiment, an arm is rotatably mounted on a guide and can extend on both sides of a pivot such that a first end of the arm is located above the guide and a second end is located below the guide. In one embodiment, the first end is elastically connected to a cutting machine, allowing for elastic rotation of the arm. For example, the first end may be connected to the cutting machine via one or more elastic members such as a spring or bungee cord. Two such arms are provided, each positioned on opposite sides of the guide, and these two arms may be connected to a common elastic member to fix or connect to the cutting machine, or each arm may be connected to a different elastic member to fix or connect to the cutting machine. In one embodiment, a bungee cord is connected to the arm via a hook fastener, and the hook fastener is hooked onto the arm. For example, the hook fastener may be hooked onto the arm via a pin that rigidly connects two or more arms. A hook fastener can prevent a portion of the bungee cord from passing through the receiving end of the hook fastener by engaging with the portion formed as a knot (or other extension) on the bungee cord. The bungee cord may be wrapped around the cutting machine, tied to the cutting machine, or otherwise frictionally connected to the cutting machine.

[0222] Figure 18 shows a block diagram of a computing device 1800 in one embodiment of the present application.

[0223] For example, the control system or controller for an actuator (e.g., a motor) shown in Figures 5A to 5B can be implemented using the exemplary computing device 1800 shown in Figure 18.

[0224] The computing device 1800 comprises at least one processor 1802, memory 1804, at least one input / output (I / O) interface 1806, and at least one network communication interface 1808.

[0225] The processor 1802 may consist of a microprocessor or microcontroller, a digital signal processing (DSP) processor, an integrated circuit (IC), a field-programmable gate array (FPGA), a reconfigurable processor, programmable read-only memory (PROM), or a combination thereof.

[0226] Memory 1804 includes computer memory located internally or externally, such as random access memory (RAM), read-only memory (ROM), compact disk read-only memory (CD-ROM), electro-optical memory, magneto-optical memory, erasable program read-only memory (EPROM), electrically erasable program read-only memory (EEPROM), ferroelectric RAM (FRAM), and the like.

[0227] The I / O interface 1806 allows the computing device 1800 to connect to one or more input devices such as a keyboard, mouse, camera, touchscreen, or microphone, or to one or more output devices such as a display screen or speakers.

[0228] The network communication interface 1808 may be configured to receive and transmit, for example, a dataset representing a machine learning model. In some embodiments, the target data storage or data structure may reside on a computing device or system, such as a mobile device.

[0229] Figure 19A is a partially disassembled front perspective view of an object cutting system according to an embodiment.

[0230] Figure 19B is a front view of the system shown in Figure 19A in one embodiment.

[0231] Figure 19C is a side view of the system shown in Figure 19A in one embodiment.

[0232] Referring to Figures 19A to 19C, the two-piece clamp 444 is similar in some respects to the two-piece clamp 344 of Figure 11, positioned to surround the guide 104 laterally to the cutting blade 108 and clamped onto the guide 104 to form a mounting bracket. A gap may be formed between the opposing parts of the two-piece clamp 344. The middle portion of the clamp 444 can be frictionally engaged with the guide 104 or its surface. The outer ends of the clamp 444 may be configured to directly engage the two divided parts of the clamp 444 with each other, or to join the two divided parts together. As shown in Figures 19A to 19C, the outer ends may be fastened to each other via bolts through openings formed in the parts of the two-piece clamp 444. An advantage is that the two divided parts can be engaged, connected, or fastened to each other around the fixing position without the guide 104. For example, this can provide a more secure fastening and reduce undesirable stress concentrations in the guide 104 (which may occur around the fixture). In various embodiments, the clamp 444 surrounds the guide 104 and is pressed against it by the force of two bolts that attach the clamp components above and below the guide 104.

[0233] In various embodiments, locking pins may be provided to secure the pivot (or housing) of the arm to the guide 104, and to secure the spring housing to the pivot (or housing).

[0234] Figure 20 is a perspective view of one member of a two-piece clamp 444 used in the system of Figure 19A in one embodiment.

[0235] In various embodiments, a gap may be provided at the interface (or between) the two members of the clamp 444 (where the bolts are positioned) so that force is applied from the clamp to the surface of the guide 104. As shown in Figure 20, shallow pockets 2002 may be formed in one or both members of the clamp 444. These pockets 2002 may be formed on the surface or part of the member configured to engage with the guide 104 (referred to as the friction surface of the member). This can increase the pressure that the friction surface applies to the guide 104. Furthermore, by inserting friction tape into the pockets 2002, the frictional force in the engagement between the clamp 444 and the guide 104 can be adjusted or increased. The pockets 2002 also serve to suppress creep of the material.

[0236] In various embodiments, one or more springs 112 may be provided to resist the rotation of the arm 1902 which is rotatably connected to the guide 104. For example, as shown in Figure 19B, springs 112 may be provided on both sides of the guide 104. The springs 112 are extended and may be, for example, linear tensile or compressive springs. Furthermore, in various embodiments, the springs 112 may be flat springs such as leaf springs.

[0237] In some embodiments, the spring 112 may define a central axis on which it extends. The spring 112 is configured to resist deformation when stretched or compressed along the central axis. For example, the spring 112 may be spirally wound along the central axis. It is understood that the spring 112 also resists deformation in other directions. For example, the spring 112 may resist bending away from a linear central axis. In various embodiments, the spring 112 may be in a fully compressed state.

[0238] The spring 112 may be integrally connected to a non-rotating spring housing 186. For example, the spring may be connected by being fixed to the spring housing 186 or by being held within the housing by friction. In the embodiments of Figures 19A to 19C, set screws are radially tightened onto the coil of the spring 112 through slots formed in the spring housing 186, thereby connecting or integrally connecting the spring housing 186 to the spring 112. One end of the spring 112 may be fixed to the spring housing 186 in this manner.

[0239] The spring housing 186 may be attached to the clamp 444, for example, around a pivot. In some embodiments, the spring housing 186 may be attached to a pivot around the arm 1902 so that the arm 1902 can rotate around the pivot, in which case the spring housing 186 itself does not rotate. For example, the spring housing 186 may be supported by a bearing attached to the arm 1902, or the arm 1902 may be supported by a bearing attached to the spring housing 186. In another embodiment, the spring housing 186 may be fixed to the clamp 444. Furthermore, in some embodiments, the arm 1902 and the spring housing 186 may be constrained to the clamp 444 via a common bolt. In addition, the spring housing 186 may be prevented from rotating relative to the guide 104 by one or more set pins, as shown in the figure. This configures the spring housing 186 to remain substantially stationary relative to the guide 104.

[0240] The pivot provides an axis of rotation for the arm 1902 to rotate. In various embodiments, a frictionless washer may facilitate the rotation of the arm 1902. The rotation of the spring housing 186 may be locked by a spring pin or dowel pin, thereby ensuring that one end of the spring 112 does not rotate during operation.

[0241] The second end of spring 112 is restricted to rotate with arm 1902. Since both ends of spring 112 move in conjunction with specific components of the system respectively, when these components move relative to each other (translation and rotation), spring 112 bends laterally. In Figure 20, a conceptual line 187 showing the central axis of spring 112 after it is bent in this way due to the rotation of arm 1902 (indicated by the arrow in Figure 19C) is shown.

[0242] In various embodiments, the first end and the second end may be the two ends of spring 112 that are separated from each other along the extension direction of spring 112. In various embodiments, the first end and the second end may be the end terminals of spring 112 along such a direction.

[0243] In various embodiments, the second end of spring 112 may be substantially linear or extended and housed within a slider 188 (or a holding block) that forms a prismatic joint with arm 1902. Spring 112 (or its second end) is slidable within slider 188 along arm 1902, but its lateral movement relative to arm 1902 is restricted. Due to this restriction, when arm 1902 rotates, spring 112 is bent in a direction opposing the rotation. Slider 188 may be fastened to arm 1902 or integrally connected in other ways.

[0244] In some embodiments, the second end of spring 112 may be directly attached to arm 1902 to provide rotational resistance when arm 1902 rotates around a pivot. For example, the second end of spring 112 may be integrally connected (fastened) to arm 1902. In some cases, the second end of spring 112 may be formed in an integral structure with arm 1902.

[0245] When arm 1902 is pushed back during normal sawing or cutting operations, spring 112 is constrained when it is curved (or bent) as shown in Figure 20. By curving spring 112 in this way, a resistance force can be generated against arm 1902.

[0246] A similar effect can occur when pulling the guide 104 back from a tangled brush. The arm 1902 rotates in the direction of the guide 104, making it easy to pull out. The spring 112 bends in the opposite direction, returning the arm 1902 to its original position, for example, at approximately 45°.

[0247] In some embodiments, the spring 112 may be directly fastened to the arm 1902. For example, a mechanical screw may be fixed to the guide 104 via a loop of the spring 112, and the spring 112 may be configured to frictionally engage with the guide 104 (or guide bar) to prevent relative movement between them.

[0248] In some embodiments, a spring contact may be provided that contacts the spring 112 at an intermediate position between both ends. The spring contact extends outward from the arm 1902 and is positioned between the spring housing 186 and the slider 188, at least partially parallel to the axis of rotation of the arm 1902. The spring contact is configured to contact the spring 112 when the spring 112 bends as the arm 1902 rotates. This has the advantage that the normal reaction force applied from the spring contact to the spring 112 when the spring 112 bends improves the effective spring stiffness and reduces fatigue and plastic deformation caused by accidentally applying excessive force to the arm 1902 and causing the spring 112 to bend beyond its yield point. In various embodiments, the spring contact may be integrally connected to the arm 1902 (e.g., fastened to the arm 1902) or formed integrally with the arm 1902. In some embodiments, the spring contact may be made of bolts. The spring contacts are removable and may be selectively positioned relative to the arm 1902. For example, in some embodiments, the spring contacts may be selectively inserted into one of a plurality of openings and held or fixed in place (see description of Figures 21A to 21B below).

[0249] Figure 21A is a partially disassembled front perspective view of an object cutting system in one embodiment.

[0250] Figure 21B is a side view of the system shown in Figure 21A in one embodiment.

[0251] The systems shown in Figures 21A-21B may be substantially similar to the systems shown in Figures 19A-19C. In the systems of Figures 21A-21C, the second end of the spring 112 may be shaped to engage with one or more features protruding from the arm 1902. For example, the eye or loop 2102 (curved or polygonal) of the spring 112 may engage with a projection protruding outward from the arm 1902. In various embodiments, the second end of the spring 112 may be integral with the rest of the spring 112. In some embodiments, the second end of the spring 112 may be a wire loop 2102. In some embodiments, the wire loop 2102 may be an extended shape, such as an elliptical shape. In some embodiments, the projection may be integral with the arm 1902. In some embodiments, the second end of the spring 112 may be shaped to receive a pin (forming a projection) attached to one side of the arm 1902. In some embodiments, the pin may be inserted into and held in an opening 2108 formed in the arm 1902, and configured to allow the spring 112 to be coupled to the arm 1902. In various embodiments, the pin may be detachably connected to the arm 1902. Such an opening 2108 may be dimensioned based on the outer diameter of the pin.

[0252] In some embodiments, a bolt 2106 may be inserted into the opening 2108. This bolt 2106 may be configured to connect to a roller 2104, for example, a substantially low-friction spool. The roller 2104 has a flange end. The bolt 2106 engages with the end of the roller 2104 opposite to the flange end, which has been inserted into the loop of the second end of the spring 112. These ends of the roller 2104 define the end of the roller 2104. The flange end is configured to fit the second end of the spring 112, preventing the flange end from passing through the second end (its loop). The roller 2104 allows the second end of the spring 112 to slide on the roller 2104 as the arm 1902 rotates, and prevents lateral movement when the roller 2104 is bolted to the arm 1902 and the second end of the spring 112 is engaged with the roller 2104. In this way, the lateral movement of the second end of the spring 112 is resisted or constrained. In some embodiments, as the second end of the spring 112 slides in this manner, the end may come into contact with the roller 2104. For example, this would cause the movement of the arm 1902 to be resisted or constrained by the spring 112.

[0253] In various embodiments, multiple openings 2108 are provided on the arm 1902 to allow pins, bolts, and / or rollers to be selectively engaged with the arm 1902. The multiple openings 2108 may be spaced apart along the arm 1902. In some embodiments, the multiple openings 2108 may be spaced apart along the extensional direction of the arm 1902 and / or laterally relative to it (see Figure 21B). For example, such selective engagement (between multiple positions of the roller 2104) can change the restraining and / or resisting force acting on the second end of the spring 112 as the arm 1902 rotates, allowing for adjustment of the spring tension. This allows the response that the arm 1902 exhibits to the applied force to be adjusted or changed according to the cutting requirements.

[0254] Figure 22A is a perspective view of the device 101 coupled to the guide 104 in one embodiment.

[0255] Figure 22B is a top view of the apparatus 101 of Figure 22A in one embodiment. As shown in Figures 22A to 22B, the apparatus includes a spring 112 which is a telescopic spring or other type of extension spring. A telescopic spring can provide a restoring force when bent perpendicular to its extension direction (or the direction in which compression / extension is configured). The spring 112 in Figures 22A to 22B is coupled to the arm 2202 and the guide 104 of the cutting blade 108, and is configured such that the rotation of the arm 2202 causes the spring 112 to bend, generating a restoring force that returns the arm 2202 to the open position. As shown in Figures 22A to 22B, a corresponding end of each spring 112 is coupled to rotate with the arm 2202. The other end of the telescopic spring 112 is slidably housed in a collar 2290, and the rotation of the arm 2202 causes the end of the telescopic spring 112 to strike the collar 2290 and bend the spring.

[0256] The arm 2202 may be an arm assembly. The arm 2202 may include a first part 2202A and a second part 2202B coupled to the cutting machine via the first part 2202A. In various embodiments, the second part 2202B may define the end of the expandable opening 111. In various embodiments, the first part 2202A and the second part 2202B may form an extension of the arm 2202. For example, the first part 2202A and the second part 2202B may be connected in series to form the entire extension of the arm 2202. In some embodiments, it is understood that an additional part of the arm 2202 may be located between the first part 2202A and the second part 2202B.

[0257] Figure 22B shows that in various embodiments, the first part 2202A may include a first sub-part located on the first side of the guide 104 and a second sub-part located on the opposite side of the first side. In various embodiments, the first and second sub-parts may be individually attached to the guide 104 and / or attached to each other by frictional coupling across the guide 104. For example, the two sub-parts may be attached to each other by pins or fasteners that pass through the guide 104. The first and second sub-parts can be attached to each other (or rigidly coupled) below the guide 104 to form a U-shaped first part 2202A that straddles the guide 104 without contacting the cutting blade 108. One of the springs 112 is located on the first side of the guide 104 and the other spring 112 is located on the second side of the guide 104. An advantage of such a configuration is that rigidity is increased, which prevents the arm 2202 from twisting improperly laterally under load and maintains proper alignment with the guide 104. This configuration allows for the realization of a greater spring force by having two springs act in parallel through a single arm.

[0258] In some embodiments, the device 101 may comprise a single spring 112 and a first part 2202A on only one side.

[0259] As a valid point, the second part 2202B may be offset from the first part 2202A and also offset from the guide 104, such that the second part 2202B is located at the center of the cutting plane defined by the cutting blade 108.

[0260] One advantage is that a single arm is sufficient to press against an object placed in the expandable opening 111. Using a single arm improves the system's balance during use, simplifies assembly, and reduces manufacturing costs.

[0261] In various embodiments, the first member 2202A may be rotatably connected to the cutting device, and the second member 2202B may be rotatably connected to the first member 2202A. In various embodiments, the first member 2202A may be positioned close to the cutting blade 108, and the second member 2202B may be positioned away from the cutting blade 108.

[0262] In various embodiments, the first member 2202A and the second member 2202B may be connected to each other at a position below the cutting blade 108, as shown in Figures 22A to 22B.

[0263] In various embodiments, the second member 2202B may be configured to rotate in one direction around the first member 2202A. The second member 2202B may be configured to allow rotation toward the cutting blade 108, while restricting rotation toward the cutting blade 108.

[0264] For example, in some embodiments, a releaseable ratchet may be connected to the first member 2202A and the second member 2202B such that the second member 2202B rotates in one direction around the first member 2202A. The releaseable ratchet may be positioned below the cutting blade 108 so that the arm 2202 does not interfere with the cutting blade 108 and / or the guide 104 even when the second member 2202B rotates toward the cutting blade.

[0265] As the second member 2202B rotates toward the cutting blade 108, the ratchet gear of the releaseable ratchet may also rotate together with the pawl (e.g., a spring-loaded pawl) that engages with the ratchet gear and performs a ratcheting action against the teeth of the ratchet gear. When the rotation of the cutting blade 108 stops and reverses, the pawl engages with the teeth of the ratchet gear, effectively stopping the movement of the second member 2202B. Subsequently, by releasing the ratchet, the second member 2202B becomes rotatable toward the cutting blade 108. For example, the ratchet may include a toggle that is lockable and can be repositioned to separate the pawl from the ratchet gear, allowing the second member 2202B to rotate freely around the first member 2202A.

[0266] Figures 23A through 23C show an example of the operation of the apparatus 101 by the rotation of the second member 2202B around the first member 2202A.

[0267] FIG. 23A is a side view of the system 100 with the two-part arm 2202 in the open position in one embodiment.

[0268] In the open position, the spring 112 is in the unloaded position (relaxed position), and the arm 2202 tends to stay in this position unless an external force is applied.

[0269] FIG. 23B is a side view of the system 100 in one embodiment where the two-part arm 2202 is in a largely open position due to the reaction force acting on the arm 2202 by an object within the expandable opening 111.

[0270] As shown in FIG. 23B, when the object 116 is pushed into the opening 111, the two-part arm 2202 can be at an angle of approximately 90° from the cutting blade 108. The first part 2202A and the second part 2202B are connected to be rotatable in one direction relative to each other, and both parts 2202A, 2202B maintain an aligned state even when the object 116 is pressed against the arm 2202.

[0271] In the wide-open position, the spring 112 is bent and generates a restoring force that pushes the arm 2202 back to the original open position.

[0272] FIG. 23C is a side view of the system 100 of FIG. 23A in one embodiment where the two-part arm 2202 is stored in the closed position.

[0273] In the retracted position, the first part 2202A is kept in the open position (for example, the position corresponding to the unloaded state of the spring 112). Meanwhile, the second part 2202B rotates toward the cutting blade 108 and is positioned in close proximity to it. This allows the system 100 to take on a compact shape suitable for transport and prevents it from getting caught on branches, for example, when removed from a tree trunk. The unidirectional rotation mechanism associated with the second part 2202B can be appropriately configured to suppress interference between the second part 2202B and the cutting blade 108 when the second part 2202B is in the retracted position or when it is subjected to an impact directed at least partially toward the cutting blade 108 in the retracted position.

[0274] In some embodiments, the apparatus shown in Figures 22 and 23A to 23C includes a wheel connected to the second portion 2202B of the arm 2202 to facilitate the cutting operation.

[0275] In Figures 23A to 23C, the cutting machine is omitted except for the guide 104 for clarity.

[0276] Figure 24 is a perspective view of a device 101 for cutting an object in one embodiment.

[0277] In the embodiment shown in Figure 24, the wheels 2592 are positioned at the ends of the (two) arms 102. The wheels are positioned at the ends of the arms 102 so as to roll relative to the object to be cut when it approaches the opening 111 or when it moves away from the opening 111.

[0278] Similar to the embodiments shown in Figures 22A to 22B, the embodiment in Figure 25 includes a collar 2290 capable of housing a spring 112 (e.g., a telescopic spring).

[0279] Figure 25 is a perspective view of the object cutting device 101 in another embodiment.

[0280] In the embodiment shown in Figure 25, the device includes two arms 2502 connected to a guide 104. The arms 2502 are configured to have a telescopic structure that allows for selective length extension and retraction. Each arm 2502 includes a first tubular section 2502A and a second tubular section 2502B. These tubular sections may be detachably connected by detachable or detachable fasteners or pins. The first tubular section 2502A is positioned within the second tubular section 2502B. The length of the arms 2502 can be adjusted by relatively extending and retracting the first tubular section and the second tubular sections 2502A and 2502B.

[0281] As shown in Figure 25, the first tubular portion 2502A is positioned inside the second tubular portion 2502B and is configured to slidably engage with the second tubular portion 2502B. The second tubular portion 2502B is provided with a plurality of openings that can receive protrusions such as pins extending from the first tubular portion 2502A, thereby enabling the first tubular portion and the second tubular portions 2502A and 2502B to be connected to each other.

[0282] This embodiment may include any combination of the features described herein. For example, the cutting machine may be rotatably connected to the arm, and may be connected to the arm using both torsion springs and linear springs to provide resistance to the rotation of the arm relative to the pivot.

[0283] Figure 26A is a perspective view of the apparatus 101 in one embodiment.

[0284] Figure 26B is an exploded perspective view of the apparatus 101 shown in Figure 26A.

[0285] Embodiments in Figures 26A and 26B include a handle 2694 that allows the device to be quickly removed from the guide 104. By operating the handle 2694, the user can quickly remove the device from the cutting machine. The handle 2694 may be a handle of a quick-release or quick-disconnect mechanism.

[0286] Figure 27 is a perspective view of the apparatus 101 in yet another embodiment.

[0287] Figure 28 is a perspective view of the apparatus 101 in yet another embodiment.

[0288] The embodiments shown in Figures 27 to 28 may be substantially similar to the embodiments shown in Figures 22 and 23A to 23C.

[0289] The embodiment shown in Figure 27 includes a bracket attached to the guide 104, which allows for easy attachment of the collar 2290, spring 112, and arm 2202 to the guide 104.

[0290] The embodiment shown in Figure 28 may include a wheel positioned at the end of the arm 2202. The wheel may be designed to be generally narrower than the width of the arm 2202 so as not to protrude from the side of the arm. In some embodiments, the width of the wheel may be approximately the same as the width of the arm 2202. It is also conceivable that the arm 2202 in the embodiment shown in Figure 27 may be equipped with a wheel. Please understand that the examples described and illustrated here are merely examples.

[0291] The embodiments described herein are non-limiting examples illustrating possible embodiments of the Art. Those considering this disclosure will recognize that modifications to the embodiments described herein will not depart from the scope of the Art. For example, various types of cutting machines may be used, and the arms may be curved, rectangular, or otherwise shaped. Additional springs may be provided to give additional elasticity, the arms may extend in multiple directions, and their surfaces may be machined to hold the object. The arms may be elastically connected by elastic (spring) elements positioned above, below, or at the same height as the guides, and these elastic elements may be made of metal, fiber (e.g., rubber cord), and / or elastic plastic. Furthermore, other modifications that can be implemented by those skilled in the art are conceivable in light of this disclosure, and these modifications are also within the scope of the Art.

Claims

1. A system for cutting an object, A cutting machine that specifies the cutting blade, A system comprising: an arm connected to the cutting machine, elastically rotatable from the cutting blade and biased to an open position, the arm inclined away from the cutting blade in the open position, defining an expandable opening between the cutting blade and the arm suitable for receiving the object, the opening being expanded when the object pushes against the arm, thereby causing the arm to rotate away from the cutting blade as the object is drawn into the opening, and pressing the object against the cutting blade.

2. The arm is connected to the cutting machine via a spring that is unloaded in the open position. The system according to claim 1, wherein the spring is configured to hold the arm in the open position, separated from the cutting blade.

3. The arm is configured to rotate about a pivot in a direction away from the cutting blade, The system according to claim 1 or claim 2, wherein the opening can be expanded by pulling the object in the direction of the pivot.

4. The system according to any one of claims 1 to 3, further comprising a guide for the cutting blade and a clamp that clamps to the end portion pivotally connected to the arm.

5. The system according to any one of claims 1 to 4, further comprising an expandable spring connected to the arm and the guide of the cutting blade, which is bent by the rotation of the arm and generates a restoring force that returns the arm to the open position.

6. The system according to claim 5, wherein the expansion spring is slidably received within the collar, and the end of the expansion spring is configured to contact the collar and bend the expansion spring when the arm rotates.

7. The arm and the guide of the cutting blade are further connected to an expandable spring that is bent by the rotation of the arm and generates a restoring force that returns the arm to the open position, The system according to any one of claims 1 to 6, wherein the expandable spring is received within the collar and rotates slidably within the collar.

8. The system according to any one of claims 1 to 6, wherein the arm is angled at an angle of at least 45° away from the cutting blade in the open position.

9. The system according to any one of claims 1 to 8, wherein a part of the arm forming the end of the opening is located on the center of the cutting surface defined by the cutting blade.

10. The system according to any one of claims 1 to 9, comprising a boom coupled to the cutting machine.

11. The cutting machine includes a motor configured to cut an object via the cutting blade, and the system is A sensor that detects data indicating the motor output of the motor, An actuator connected to the arm rotates the arm in the direction toward and away from the cutting blade, A controller that receives data from the sensor, is operably connected to the actuator, and is configured to control the rotation of the arm and the force that presses the object against the cutting blade according to the data, The system according to any one of claims 1 to 10, further comprising:

12. The aforementioned controller, Processor and The system includes a computer-readable memory connected to the processor, which stores processor-executable instructions that constitute the processor at runtime, and when an instruction is executed, Receiving the aforementioned data during disconnection, and The system according to claim 11, further comprising controlling the arm on the opposite side of the object based on the aforementioned data to alleviate the motor load.

13. The system according to any one of claims 1 to 12, wherein the cutting machine is a chainsaw, and a cutting chain is attached to the periphery of the guide of the cutting blade.

14. The system according to any one of claims 1 to 13, wherein the cutting machine is a grass trimmer.

15. The aforementioned arm is A first part is rotatably connected to the cutting machine and positioned near the cutting blade, The system according to any one of claims 1 to 14, further comprising a second part rotatably connected to the first part, positioned distal to the cutting blade, and connected to the cutting machine via the first part.

16. The system according to claim 15, wherein the second part is configured to be rotatable in one direction around the first part, allowing the second part to rotate about the first part toward the cutting blade, and preventing the second part from rotating about the first part toward the cutting blade.

17. The system according to any one of claims 1 to 16, wherein the arm includes a roller disposed at the end of the arm.

18. The system according to any one of claims 1 to 17, wherein the arm has a first tubular portion arranged within a second tubular portion, and the arm can be extended by relatively telescoping the first tubular portion and the second tubular portion.

19. The system according to any one of claims 1 to 18, wherein the arm is detachably attached to the cutting machine.

20. The system according to any one of claims 1 to 19, wherein the arm is connected to the cutting machine via an actuator, and the actuator is configured to elastically rotate the arm toward and toward the cutting blade.

21. The system according to any one of claims 1 to 20, wherein the arm is provided with a wheel at an end away from the cutting machine, allowing the wheel to roll along the object when the object is introduced into the opening.

22. The aforementioned arm is the first arm, The system according to any one of claims 1 to 21, further comprising: a system coupled to the cutting machine and elastically rotatable from the cutting blade, spaced apart from the first arm, and configured such that the cutting blade is sandwiched between the first arm and the second arm, and such that the first and second arms can press the object against the cutting blade when the object is guided into the opening.

23. Arm and A device for cutting an object using a cutting machine having a cutting blade, the cutting blade comprising: a joint connected to the arm and capable of elastically rotating the arm away from the cutting blade, and adapted for attachment to a cutting machine so as to bias the arm in the open position, wherein the joint is configured such that, by angling the arm away from the cutting blade in the open position, an expandable opening is defined between the cutting blade and the arm that is suitable for receiving an object and expands when the object pushes the arm, causing the arm to rotate away from the cutting blade, and the object can be pressed against the cutting blade when it is drawn into the opening.

24. The apparatus according to claim 23, wherein the joint is configured to be in a relaxed state in the open position, and the arm is connected to the cutting machine via a spring configured to hold the arm away from the cutting blade in the open position.

25. The apparatus according to claim 23 or 24, wherein, when the arm is coupled to the cutting machine via the joint, the arm is configured to rotate away from the cutting blade about a pivot point, and the opening is expanded by pulling the object toward the pivot point.

26. The apparatus according to any one of claims 23 to 25, further comprising a clamp that can be clamped to an end rotatably coupled to a guide for the cutting blade and the arm.

27. The apparatus according to any one of claims 23 to 26, wherein the joint further comprises an extension spring configured to be connected to the arm and to the guide of the cutting blade, and when the arm is connected to the cutting machine via the joint, the extension spring generates a restoring force that returns the arm to the open position by being bent by the rotation of the arm.

28. The apparatus according to claim 27, wherein the extension spring is slidably housed within the collar such that when the arm is connected to the cutting machine, the end of the extension spring contacts the collar and bends the extension spring.

29. The joint further comprises an extension spring connected to the arm and configured to be connected to the guide of the cutting blade, and is configured such that the rotation of the arm bends the extension spring, thereby generating a restoring force that returns the arm to the open position. The apparatus according to any one of claims 23 to 28, wherein the extension spring is housed within the collar and rotates freely within the collar.

30. The apparatus according to any one of claims 23 to 28, wherein when the arm is connected to the cutting machine via the joint, the arm is configured to be tilted at least 45° away from the cutting blade in the open position.

31. The apparatus according to any one of claims 23 to 30, wherein when the arm is connected to the cutting machine via the joint, a portion of the arm forming the end of the opening is positioned at the center of the cutting surface defined by the cutting blade.

32. The cutting machine includes a motor configured to cut the object via the cutting blade, and the device is An actuator that can be connected to the arm and is configured to rotate the arm toward and toward the cutting blade when connected to the cutting machine, The apparatus according to any one of claims 23 to 31, further comprising: a controller capable of receiving data from a sensor configured to detect data indicating the motor output of the motor, and operablely connectable to the actuator, wherein the controller, while connected to the cutting machine, is configured to control the rotation of the arm in accordance with the data and to control the operation of pressing the object against the cutting blade.

33. The aforementioned controller, Processor and A computer-readable memory connected to the processor, wherein the memory, when executed, stores processor-executable instructions that constitute the processor, and according to the instructions, The operation of receiving the aforementioned data during disconnection, and, The apparatus according to claim 32, further comprising a computer-readable memory that configures an operation to reduce the motor load by controlling the arm on the opposite side of the object based on the aforementioned data.

34. The apparatus according to any one of claims 23 to 33, wherein the cutting machine is a chainsaw and a cutting chain is attached to the periphery of the guide of the cutting blade.

35. The apparatus according to any one of claims 23 to 34, wherein the cutting machine is a brush cutter.

36. The aforementioned arm is A first portion is rotatably connected to the cutting machine via the joint at a position close to the cutting blade, The apparatus according to any one of claims 23 to 35, comprising: a second part rotatably connected to the first part, located distal to the cutting blade when the first part is connected to the cutting machine, and connectable to the cutting machine via the first part.

37. The apparatus according to claim 36, wherein the second part is configured to be rotatable in one direction around the first part.

38. The apparatus according to any one of claims 23 to 37, wherein the arm includes a roller disposed at the end of the arm.

39. The apparatus according to any one of claims 23 to 38, wherein the arm includes a first tubular portion disposed within a second tubular portion, and the arm can be extended by relatively extending and retracting the first and second tubular portions in a telescopic manner.

40. The apparatus according to any one of claims 23 to 39, wherein the joint is configured to detachably attach the arm to the cutting machine.

41. The apparatus according to any one of claims 23 to 40, wherein the joint further comprises an actuator configured to connect the arm to the cutting machine and to elastically rotate the arm toward and toward the cutting blade.

42. The apparatus according to any one of claims 23 to 41, wherein the arm is provided with a wheel at the arm end distal to the cutting machine, thereby enabling the wheel to roll along the object when the object is drawn into the opening.

43. The aforementioned arm is the first arm, and the aforementioned joint is the first joint, The apparatus according to any one of claims 23 to 42, further comprising a second arm, the second arm configured to be connected to the cutting machine via a second joint, elastically rotatable in a direction away from the cutting blade, spaced apart from the first arm when connected to the cutting machine via the second joint, and configured to sandwich the cutting blade between the first arm and the second arm, the first arm and the second arm being adapted to press the object against the cutting blade when the object is introduced into the opening.

44. A kit for cutting an object using a cutting machine having a cutting edge, The aforementioned kit is Arm and A kit for cutting an object using a cutting machine having a cutting edge, the kit comprising: a joint configured to elastically rotate the arm away from the cutting edge, wherein the joint biases the arm to an open position when the arm is connected to the cutting machine via the joint, and the joint defines an expandable opening between the cutting edge and the arm that is suitable for receiving the object and expands when the object pushes the arm, causing the arm to rotate away from the cutting edge, and the joint is configured to allow the object to be pressed against the cutting edge when the object is drawn into the opening.

45. The kit according to claim 44, wherein the joint is configured to be in a relaxed state in the open position and to connect the arm to the cutting machine via a spring configured to hold the arm away from the cutting blade in the open position.

46. The kit according to claim 44 or 45, wherein the arm is configured to rotate away from the cutting blade around a pivot point when the arm is coupled to the cutting machine via the joint, and the opening is expanded by pulling the object toward the pivot point.

47. The kit according to any one of claims 44 to 46, further comprising a clamp that can be clamped to an end rotatably coupled to a guide for the cutting blade and the arm.

48. The kit according to any one of claims 44 to 47, wherein the joint further comprises an extension spring configured to connect the arm to a guide of the arm and the cutting edge on which the arm rotates, and when the arm is connected to the cutting machine via the joint, the extension spring is bent by the rotation of the arm, thereby generating a restoring force that returns the arm to the open position.

49. The kit according to claim 48, wherein the extension spring is configured to be slidably housed within the collar such that when the arm is connected to the cutting machine, the end of the extension spring contacts the collar and bends the extension spring.

50. The joint further comprises an extension spring configured to be connected to the arm and the guide of the cutting blade, and is configured such that the rotation of the arm bends the extension spring, thereby generating a restoring force that returns the arm to the open position. The kit according to any one of claims 44 to 49, wherein the extension spring is housed within the collar and rotates freely within the collar.

51. The kit according to any one of claims 44 to 49, wherein when the arm is connected to the cutting machine via the joint, the arm is configured to be tilted at least 45° away from the cutting blade in the open position.

52. The kit according to any one of claims 44 to 51, wherein when the arm is connected to the cutting machine via the joint, a portion of the arm forming the end of the opening is positioned at the center of the cutting surface defined by the cutting blade.

53. The kit includes a motor configured to cut an object via the cutting blade, and the kit further includes, An actuator that can be connected to the arm and is configured to rotate the arm toward and toward the cutting blade when connected to the cutting machine, The kit according to any one of claims 44 to 52, further comprising: a controller capable of receiving data from a sensor configured to detect data indicating the motor output of the motor, and operablely connectable to the actuator, wherein the controller, while connected to the cutting machine, is configured to control the rotation of the arm in accordance with the data and to control the operation of pressing the object against the cutting blade.

54. The aforementioned controller, Processor and A computer-readable memory connected to the processor, wherein the memory, when executed, stores processor-executable instructions that constitute the processor, and according to the instructions, The operation of receiving the aforementioned data during disconnection, and, The kit according to claim 53, comprising a computer-readable memory that configures an operation to reduce the motor load by controlling the arm on the opposite side of the object based on the aforementioned data.

55. The kit according to any one of claims 44 to 54, wherein the cutting machine is a chainsaw, and a cutting chain is attached to the periphery of the guide of the cutting blade.

56. The kit according to any one of claims 44 to 55, wherein the cutting machine is a brush cutter.

57. The aforementioned arm is A first portion is rotatably connected to the cutting machine via the joint at a position close to the cutting blade, A kit according to any one of claims 44 to 56, comprising: a second part rotatably connected to the first part, located distal to the cutting blade when the first part is connected to the cutting machine, and connectable to the cutting machine via the first part.

58. The kit according to claim 57, wherein the second part is configured to be rotatable in one direction around the first part.

59. The kit according to any one of claims 44 to 58, wherein the arm includes a roller located at the end of the arm.

60. The kit according to any one of claims 44 to 59, wherein the arm includes a first tubular portion disposed within a second tubular portion, and the arm can be extended by relatively extending and retracting the first tubular portion and the second tubular portion in a telescopic manner.

61. The kit according to any one of claims 44 to 60, wherein the joint is configured to detachably attach the arm to the cutting machine.

62. The kit according to any one of claims 44 to 61, further comprising an actuator configured to connect the arm to the cutting machine and to elastically rotate the arm toward and toward the cutting blade.

63. The kit according to any one of claims 44 to 62, wherein the arm is provided with a wheel at the arm end distal to the cutting machine, allowing the wheel to roll relative to the object when the object is drawn into the opening.

64. The aforementioned arm is the first arm, and the aforementioned joint is the first joint, The kit according to any one of claims 44 to 63, further comprising a second arm, the second arm configured to be connected to the cutting machine via a second joint, elastically rotatable away from the cutting blade, spaced apart from the first arm when connected to the cutting machine via the second joint, and configured to sandwich the cutting blade between the first arm and the second arm, the first arm and the second arm being adapted to press the object against the cutting blade when the object is introduced into the opening.

65. Arm and An apparatus for cutting an object using a cutting machine having a cutting blade, the apparatus comprising: means for attaching the arm to the cutting machine, the means enabling the arm to be elastically rotated away from the cutting blade and enabling the arm to be biased in the open position, wherein the arm is angled away from the cutting blade in the open position to define an expandable opening between the cutting blade and the arm that is suitable for receiving an object and expands when the object pushes the arm, causing the arm to rotate away from the cutting blade, and enabling the object to be pressed against the cutting blade when the object is drawn into the opening.

66. The apparatus according to claim 65, wherein the means includes a spring that is unloaded in the open position, and holds the arm in a state separated from the cutting blade in the open position.

67. The arm is configured to rotate about a pivot point in a direction away from the cutting blade when attached to the cutting machine. The apparatus according to claim 65 or 66, wherein the opening can be expanded by pulling the object in the direction of the pivot.

68. The apparatus according to any one of claims 65 to 67, wherein the means includes a clamp configured to be clampable to a guide of the cutting blade and one end of which is pivotally coupled to an arm.

69. The apparatus according to any one of claims 65 to 68, wherein the means includes an expandable spring connected to the arm and configured to be connected to a guide for the cutting blade, the expandable spring is bent by the rotation of the arm when the arm is connected to the cutting machine, thereby generating a restoring force that returns the arm to the open position.

70. The apparatus according to claim 69, wherein the telescopic spring is configured to be slidably housed within a collar, and when the arm is connected to the cutting machine, the rotation of the arm causes the end of the telescopic spring to strike the collar and bend.

71. The apparatus according to any one of claims 65 to 70, wherein the means includes a telescopic spring configured to be coupled to the arm and connected to a guide of the cutting edge, the telescopic spring being bent by the rotation of the arm to generate a restoring force that returns the arm to the open position, and the telescopic spring being housed so as to be freely slidable within the collar.

72. The apparatus according to any one of claims 65 to 71, wherein the arm, when attached to the cutting machine, is angled such that it is at least 45° away from the cutting edge in the open position.

73. The apparatus according to any one of claims 65 to 72, wherein the arm is configured such that, when attached to the cutting machine, a portion of the arm forming the end of the opening is located at the center of the cutting surface defined by the cutting edge.

74. The cutting machine includes a motor configured to cut an object through the cutting edge, and the cutting machine further includes: An actuator that can be connected to the arm so as to rotate the arm toward and away from the cutting edge when attached to the cutting machine, The apparatus according to any one of claims 65 to 73, wherein it is capable of receiving data from a sensor and is suitable for operably connecting to the actuator, the sensor is configured to detect data indicating the motor output of a motor, and the controller is configured, when attached to the cutting machine, to control the rotation of the arm according to the data and to control the operation of pressing the object against the cutting edge.

75. The aforementioned controller, Processor and The system includes a computer-readable memory connected to the processor, which stores processor-executable instructions that constitute the processor at runtime, and when an instruction is executed, Receiving the aforementioned data during disconnection, and The apparatus according to claim 74, comprising controlling the arm on the opposite side of the object based on the aforementioned data to alleviate the motor load.

76. The apparatus according to any one of claims 65 to 75, wherein the cutting machine is a chainsaw and a cutting chain is attached to the periphery of the guide of the cutting blade.

77. The apparatus according to any one of claims 65 to 76, wherein the cutting machine is a grass trimmer.

78. The aforementioned arm is A first part is configured to be rotatably connected to the cutting machine near the cutting blade, A second part is rotatably connected to the first part, positioned distal to the cutting blade when the first part is connected to the cutting machine, and configured to engage with the cutting machine via the first part. Apparatus according to any one of claims 65 to 77, including

79. The apparatus according to claim 78, wherein the second part is configured to be rotatable in one direction around the first part.

80. The apparatus according to any one of claims 65 to 79, wherein a roller is arranged at the end of the arm.

81. The apparatus according to any one of claims 65 to 80, wherein the arm includes a first tubular portion disposed within a second tubular portion, and the arm can be extended by relatively extending and retracting the first tubular portion and the second tubular portion in a telescopic manner.

82. The apparatus according to any one of claims 65 to 81, wherein the means enables the arm to be detachably attached to the cutting machine.

83. The apparatus according to any one of claims 65 to 82, further comprising an actuator that connects the arm to the cutting machine and elastically rotates the arm toward and toward the cutting blade.

84. The apparatus according to any one of claims 65 to 83, characterized in that the arm is provided with a wheel at the arm end distal to the cutting machine, enabling the wheel to roll along the object when the object is drawn into the opening.

85. The aforementioned arm is the first arm, and the aforementioned means is the first means, The apparatus according to any one of claims 65 to 84, further comprising a second arm, the second arm being connected to the cutting machine via a second means and being elastically rotatable away from the cutting blade, positioned at a distance from the first arm when attached to the cutting machine, and configured such that the cutting blade is sandwiched between the first arm and the second arm, and the first arm and the second arm being adapted to press the object against the cutting blade when the object is introduced into the opening.

86. A cutting system, A first cutting machine having a first cutting blade for cutting a first object, An apparatus according to any one of claims 65 to 85, wherein the cutting machine is a first cutting machine, the cutting blade is a first cutting blade, and the object is a first object.

87. A kit for forming the apparatus according to any one of claims 65 to 85.

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