A safety-limiting cutting device

Abstract

This utility model discloses a safety-limiting cutting device, including a housing with two opposing limiting plates forming a cutting cavity for accommodating a cutting tool between them. Limiting jaws are respectively provided on the same side edge of the two limiting plates, both jaws being semi-enclosed. The cutting tool has an exposed cutting portion extending between the two limiting jaws. The ends of the limiting jaws are called jaw tips, and the line connecting the two jaw tips is called the jaw tip line. The exposed cutting portion of the cutting tool is within the jaw tip line. This utility model provides limiting jaws on the limiting plates on both sides of the cutting tool, which can hold the bamboo in place. At the moment of cutting the bamboo shell, this prevents the cutting device from becoming uncontrollable due to a sudden reduction in the cutting area.

Description

Technical Field

[0001] This utility model relates to the field of cutting device technology, and in particular to a cutting device with safety limiting. Background Technology

[0002] When using electric cutting devices to harvest bamboo or cut bamboo into sections, because bamboo is hollow, the contact area between the cutting tool and the bamboo suddenly decreases the moment the cutting tool cuts through the bamboo shell. The resistance experienced by the cutting tool also suddenly decreases, which can cause the cutting tool to suddenly "rush" through the bamboo during the cutting process. This can easily cause the cutting device to go out of control and pose a safety hazard. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a safe limiting cutting device. The limiting plates on both sides of the cutting blade have limiting jaws that can hold the bamboo. At the moment of cutting the bamboo shell, the cutting device can avoid loss of control due to the sudden reduction of the cutting area.

[0004] Technical solution: To achieve the above objective, the present invention provides a safety limiting cutting device, comprising a housing, two limiting plates arranged opposite to each other on the housing, forming a cutting cavity between the two limiting plates to accommodate a cutting tool; limiting jaws are respectively provided on the same side edge of the two limiting plates, and both limiting jaws are semi-enclosed; the cutting tool has an exposed cutting part that extends into the space between the two limiting jaws.

[0005] Furthermore, the end of the limiting jaw is a jaw tip, and the line connecting the two jaw tips is called the jaw tip line; the exposed cutting part of the cutting tool is within the jaw tip line.

[0006] Furthermore, the two limiting plates are parallel to each other, and the shapes of the two limiting jaws are identical.

[0007] Furthermore, the limiting jaws are arc-shaped, and the exposed cutting portion is centrally located between the two jaw tips of the limiting jaws.

[0008] Furthermore, a connecting post is provided between the two limiting plates, and several eccentric blocks are stacked on the connecting post. The eccentric blocks are elastic structures that can rotate around the connecting post to retract into the cutting cavity or extend out of the limiting jaws.

[0009] Furthermore, the housing also includes several side plates, and the two limiting plates are connected by several side plates; a cutting cavity with a single-sided opening is formed between the two limiting plates and several side plates, and a chip leakage hole is provided at the bottom of the cutting cavity.

[0010] Furthermore, the cutting tool is a saw blade, which is driven to rotate by a drive mechanism. The rotation center of the saw blade is located inside the cutting cavity, and the edge of the saw blade extends into the space between two limiting jaws as the exposed cutting part.

[0011] Furthermore, the upper part of the cutting cavity has a drive cavity for accommodating the drive mechanism, and the outer casing of the drive cavity stands on the machine housing to form a chip-blocking structure.

[0012] Furthermore, the two ends of the housing are a cutting end and a hand-held end, respectively. The limiting jaws are located at the cutting end, and the plane where the saw blade is located is the cutting plane. A fixed handle and a movable handle are arranged side by side on the hand-held end of the housing. The movable handle is rotatably connected to the housing, and the rotation axis of the movable handle is parallel to the cutting plane.

[0013] Beneficial effects: The safety limiting cutting device of this utility model has limiting jaws on the limiting plates on both sides of the cutting blade. During the bamboo cutting process, after the saw blade cuts through the bamboo shell, the contact area between the saw blade and the bamboo decreases, and the resistance of the bamboo to the saw blade decreases. This may cause the cutting device to suddenly "rush forward". However, because of the limiting jaws on the limiting plate, the limiting jaws on the limiting plate will stop the bamboo and prevent the cutting blade from going out of control due to excessive forward "rushing" distance, thereby improving the safety of the cutting device. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the overall structure of the cutting device of this utility model;

[0015] Appendix Figure 2 This is a top view of the cutting device of this utility model;

[0016] Appendix Figure 3 This is a schematic diagram of the bottom structure of the cutting device of this utility model.

[0017] In the diagram, 1-machine housing, 2-limiting plate, 3-cutting cavity, 4-limiting jaws, 5-jaw tip connection line, 6-connecting post, 7-eccentric block, 8-side plate, 9-chip leakage hole, 10-saw blade, 11-outer casing, 12-fixed handle, 13-movable handle, 14-grip. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] As attached Figures 1 to 3The aforementioned safety-limiting cutting device includes a housing 1 with two opposing limiting plates 2. The surfaces of the two limiting plates 2 face each other and are spaced apart, forming a cutting cavity 3 between them to accommodate a cutting tool. Limiting jaws 4 are respectively provided on the same side edge of the two limiting plates 2, and both jaws 4 are semi-enclosed. The cutting tool has an exposed cutting portion that extends between the two jaws 4. Therefore, when the exposed cutting portion of the cutting tool contacts the bamboo, the jaws 4 will semi-enclose the bamboo.

[0020] During bamboo cutting, once the cutting blade cuts through the bamboo sheath, the contact area between the blade and the bamboo decreases, reducing the resistance from the bamboo and causing the blade to suddenly "jump" forward. However, due to the presence of the limiting plate 2, after the blade has "jumped" a certain distance, the limiting jaws 4 on the limiting plate 2 will stop against the bamboo, preventing the blade from going out of control due to excessive forward movement. The depth of the cutting part exposed by the cutting blade is greater than the thickness of the bamboo sheath, thus allowing the blade to cut through it; however, the depth of the cutting part exposed by the cutting blade is less than the diameter of the bamboo. Therefore, after the limiting plate 2 stops against the bamboo, the cutting device needs to be rotated to allow the cutting blade to continue cutting the bamboo circumferentially.

[0021] As attached Figure 2 As shown, the end of the limiting jaw 4 is called the jaw tip, and the line connecting the two jaw tips of the limiting jaw 4 is called the jaw tip line 5. The exposed cutting part of the cutting tool is inside the jaw tip line 5, so when the cutting tool contacts the bamboo, the limiting jaw 4 will partially surround the bamboo. If the exposed cutting part extends beyond the jaw tip line 5, the cutting tool will easily slip relative to the bamboo because the surface of the bamboo is relatively smooth, making it inconvenient to cut the bamboo.

[0022] A connecting post 6 is provided between the two limiting plates 2, and the two limiting plates 2 are connected by the connecting post 6 to improve the strength of the limiting plates 2. Several eccentric blocks 7 are stacked on the connecting post 6, and the eccentric blocks 7 are rotatably engaged with the connecting post 6, as shown in the attached figure. Figure 2 As shown, the eccentric block 7 can rotate around the connecting post 6 to retract into the cutting cavity 3 or extend out of the limiting jaws 4. Since the eccentric block 7 rotates around the connecting post 6, its angle is random. However, there are multiple eccentric blocks 7 on a single connecting post 6, so generally one eccentric block 7 will extend out of the limiting jaws 4. When one eccentric block 7 extends out of the limiting jaws 4, the bamboo about to collide with the limiting plate 2 will preferentially hit the eccentric block 7, causing it to rotate back into the cutting cavity 3. The eccentric block 7 is an elastic structure, so it can buffer the impact of the bamboo, making it less likely for the cutting device to go out of control when the bamboo hits the limiting plate 2.

[0023] The two limiting plates 2 are parallel and opposite to each other, and the two limiting jaws 4 have the same shape. During the bamboo cutting process, the two limiting jaws 4 can simultaneously abut against the outer wall of the bamboo. (See attached image) Figure 2 In one embodiment shown, the limiting jaws 4 are arc-shaped, making it easier for the cutting device to rotate and cut around the bamboo. The exposed cutting part is centrally located between the two tips of the limiting jaws 4, so that during the bamboo cutting process, the bamboo is also centered between the two tips of the limiting jaws 4, and the bamboo is not easy to slip out of the limiting jaws 4.

[0024] The housing 1 also includes several side plates 8, and the two limiting plates 2 are connected by the side plates 8 to form a whole. A cutting cavity 3 with a single-sided opening is formed between the two limiting plates 2 and the side plates 8, and the exposed cutting part of the cutting tool extends from the opening side of the cutting cavity 3. A chip leakage hole 9 is also provided at the bottom of the cutting cavity 3, so that bamboo chips entering the cutting cavity 3 can be leaked out through the chip leakage hole 9 during the bamboo cutting process.

[0025] The cutting tool is a circular saw blade 10, which is centrally positioned between two limiting plates 2. The saw blade 10 is driven to rotate by a drive mechanism, with its rotation center located within the cutting cavity 3. The edge of the saw blade 10 extends into the space between the two limiting jaws 4 as the exposed cutting portion. Above the cutting cavity 3 is a drive cavity for accommodating the drive mechanism, which is a motor. The motor's shaft is connected to the saw blade 10. An outer casing 11 of the drive cavity stands on the machine housing 1, forming a chip-blocking structure. During bamboo cutting, the outer casing 11 blocks bamboo chips, reducing the amount of bamboo chips splashed onto the operator.

[0026] The housing 1 has a cutting end and a handheld end at its two ends. The housing 1 has an opening at the cutting end, and the limiting jaws 4 are located at the cutting end. The saw blade 10 extends from the cutting end, and the plane on which the saw blade 10 is located is the cutting plane. A fixed handle 12 and a movable handle 13 are arranged side by side on the handheld end of the housing 1. The fixed handle 12 is fixedly connected to the housing 1, and the movable handle 13 is rotatably connected to the housing 1. The axis of rotation of the movable handle 13 is parallel to the cutting plane.

[0027] In the process of harvesting bamboo, the roots are usually cut to obtain as much bamboo as possible. If a conventional electric saw is used, the operator needs to bend over to cut the roots, which makes the operation difficult. Therefore, this invention provides a movable handle 13 and a fixed handle 12, so that the operator does not need to bend over when cutting the roots and it is also convenient to adjust the cutting angle.

[0028] As attached Figure 1As shown, the housing 1 is provided with an ear seat, and the lower end of the movable handle 13 is hinged to the ear seat. A grip 14 is provided at the upper end of the movable handle 13. When using the cutting device, the operator's left hand grips the grip 14 from below, while the operator's right hand operates the fixed handle 12 to adjust the cutting angle of the saw blade 10. The lower end of the fixed handle 12 is located near the drive cavity. The fixed handle 12 is tubular and hollow inside, containing power supply lines connected to the motor.

[0029] When the cutting device of this utility model is in operation, the operator's left hand holds the handle 14 from below, while the operator's right hand operates the fixed handle 12. The cutting angle of the saw blade 10 is then adjusted through the fixed handle 12, and the saw blade 10 is aligned with the root of the bamboo for cutting. During the cutting process, after the saw blade 10 cuts through the bamboo shell, the contact area between the saw blade 10 and the bamboo decreases, and the resistance of the bamboo to the saw blade 10 decreases. This may cause the cutting device to suddenly "jump" forward. However, because the limiting plate 2 has a limiting jaw 4, the limiting jaw 4 on the limiting plate 2 will stop the bamboo, preventing the cutting tool from going out of control due to excessive forward "jumping" distance. Then, the cutting device cuts around the bamboo, completing the harvesting of the bamboo.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety-limiting cutting device, characterized in that: Includes a housing (1), on which two limiting plates (2) are arranged opposite to each other, and a cutting cavity (3) for accommodating the cutting tool is formed between the two limiting plates (2); limiting jaws (4) are respectively provided on the same side edge of the two limiting plates (2), and the two limiting jaws (4) are semi-enclosed; the cutting tool has an exposed cutting part, which extends into the space between the two limiting jaws (4).

2. The safety limiting cutting device according to claim 1, characterized in that: The end of the limiting jaw (4) is the jaw tip, and the line connecting the two jaw tips of the limiting jaw (4) is called the jaw tip line (5); the exposed cutting part of the cutting tool is within the jaw tip line (5).

3. The cutting device with safety limiting according to claim 2, characterized in that: The two limiting plates (2) are parallel to each other, and the two limiting jaws (4) have the same shape.

4. The safety limiting cutting device according to claim 2, characterized in that: The limiting jaws (4) are arc-shaped, and the exposed cutting part is centrally located between the two jaw tips of the limiting jaws (4).

5. A safety-limiting cutting device according to claim 2, characterized in that: A connecting post (6) is provided between the two limiting plates (2). Several eccentric blocks (7) are stacked on the connecting post (6). The eccentric blocks (7) are elastic structures. The eccentric blocks (7) can rotate around the connecting post (6) to retract into the cutting cavity (3) or extend out of the limiting jaws (4).

6. The cutting device with safety limiting according to claim 1, characterized in that: The housing (1) also includes several side plates (8), and the two limiting plates (2) are connected by several side plates (8); a cutting cavity (3) with a single-sided opening is formed between the two limiting plates (2) and several side plates (8), and a chip leakage hole (9) is provided at the bottom of the cutting cavity (3).

7. The cutting device with safety limiting according to claim 1, characterized in that: The cutting tool is a saw blade (10), which is driven to rotate by a drive mechanism. The rotation center of the saw blade (10) is located inside the cutting cavity (3), and the edge of the saw blade (10) extends into the two limiting jaws (4) as the exposed cutting part.

8. A safety-limiting cutting device according to claim 6, characterized in that: Above the cutting cavity (3) is a drive cavity for accommodating the drive mechanism. The outer cover (11) of the drive cavity stands on the housing (1) to form a chip-blocking structure.

9. A safety-limiting cutting device according to claim 6, characterized in that: The two ends of the housing (1) are the cutting end and the hand-held end, respectively. The limiting jaw (4) is located at the cutting end, and the plane where the saw blade (10) is located is the cutting plane. A fixed handle (12) and a movable handle (13) are arranged side by side on the hand-held end of the housing (1). The movable handle (13) is rotatably connected to the housing (1), and the rotation axis of the movable handle (13) is parallel to the cutting plane.

Images