Cutter bit for cutting tool and cutting tool

Abstract

The tool bit comprises a fixed blade, a movable blade, a bracket and a sleeve, the lower end of the fixed blade is fixed to the sleeve, one side of the lower end of the movable blade is rotatably connected with the fixed blade, and the other side of the movable blade is rotatably connected with the bracket. The other side of the lower end of the movable blade is connected with the bracket, the bracket is connected with a rod installed in the sleeve, the bracket moves up and down relative to the sleeve along with the up-down movement of the rod, and the movable blade can rotate relative to the fixed blade along with the up-down movement of the bracket.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cutting tools, and in particular to a cutting tool head and a cutting tool. Background Art

[0002] This section provides background information related to the present application which does not necessarily constitute prior art.

[0003] There are tools for pruning branches in the prior art, such as electric branch pruners, etc. The existing pruning machines have problems such as poor operating reliability, can only handle branches with a diameter of less than 40 mm, and have limited shearing power. Utility Model Content

[0004] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0005] The purpose of the present invention is to solve or alleviate at least one of the above problems.

[0006] In particular, an object of the present invention is to provide a cutting head and a cutting tool for a cutting tool, wherein the cutting tool realizes the cutting action of the cutting head by the up and down movement of a rod connected to a power device, so that the operation reliability of the cutting head is higher.

[0007] According to one aspect of the present disclosure, a cutter head for a cutting tool is provided, the cutter head comprising a fixed blade, a movable blade, a bracket and a sleeve, the lower end of the fixed blade being fixed on the sleeve, one side of the lower end of the movable blade being rotatably connected to the fixed blade, the other side of the lower end of the movable blade being connected to the bracket, the bracket being connected to a rod installed in the sleeve, the bracket moving up and down relative to the sleeve as the rod moves up and down, and the movable blade being able to rotate relative to the fixed blade as the bracket moves up and down.

[0008] In some examples according to the present disclosure, the sleeve includes a first mounting portion, and the stationary blade is connected to the sleeve via the first mounting portion.

[0009] In some examples according to the present disclosure, the stationary blade and the sleeve are an integral structure.

[0010] In some examples according to the present disclosure, the sleeve includes a second mounting portion, the second mounting portion is a hollow cylindrical structure, and the rod is installed in the second mounting portion and connected to the bracket.

[0011] In some examples according to the present disclosure, a first step portion is provided in the second mounting portion, a second step portion is provided on the rod, and a spring is provided between the first step portion and the second step portion.

[0012] In some examples according to the present disclosure, a first hole is provided at the lower end of the movable blade, and a second hole is provided on the bracket. The first hole and the second hole are connected by a pin. The first hole is a circular hole, and the second hole is an elongated hole.

[0013] In some examples according to the present disclosure, a first hole is provided at the lower end of the movable blade, and a second hole is provided on the bracket. The first hole and the second hole are connected by a pin. The first hole is an elongated hole, and the second hole is a circular hole.

[0014] In some examples according to the present disclosure, the shape of the blade portion of the movable blade is one or more of an Archimedean spiral, a Fibonacci spiral, and an involute.

[0015] In some examples according to the present disclosure, a support surface of the stationary blade opposite to the blade edge portion is provided with anti-slip teeth having a concave-convex structure.

[0016] In some examples according to the present disclosure, the upper end of the stationary blade has a groove, and when the cutter head is in the closed position, at least a portion of the cutting edge portion of the movable blade is accommodated in the groove of the stationary blade.

[0017] In some examples according to the present disclosure, the stationary blade includes a first portion and a second portion that are parallel to each other, and the slot is formed between the first portion and the second portion.

[0018] In some examples according to the present disclosure, the lower end of the stationary blade is a unitary structure.

[0019] According to another aspect of the present disclosure, a cutting tool is provided, comprising a cutter head and a power device according to the above technical solution.

[0020] In some examples according to the present disclosure, the power device is a hydraulic cylinder connected to the sleeve of the cutter head, so that a hydraulic rod of the hydraulic cylinder drives the rod of the cutter head.

[0021] The cutter head and cutting tool disclosed herein can achieve at least the following beneficial effects:

[0022] The movable blade of the cutter head disclosed in the embodiment of the present invention rotates relative to the fixed blade through the up and down movement of the rod. The rod does not need to move left and right. The pin between the bracket and the movable blade moves left and right in the long hole of the bracket or the movable blade to achieve the up and down and rotational combined cycloidal motion of the pin relative to the sleeve, so that the power device (such as a hydraulic cylinder, etc.) that provides power to the rod only needs to provide vertical force to the rod, and does not need to provide left and right force, avoiding the reduction in operating reliability of the power device that may be caused by multi-directional movement (for example, the wear of the sealing device of the hydraulic cylinder caused by left and right movement, thereby causing hydraulic oil leakage), so that the operating reliability of the cutter head is higher; the shape of the blade portion of the movable blade adopts one or more forms of Archimedean spiral, Fibonacci spiral and involute. The arrangement of this structure of the cutter head makes it easy for the cutter head to exit the cutting position when the cut object is stuck; in addition, the arrangement of this cutter head makes the distance between the movable blade and the fixed blade larger when the cutter head is in the open position, so that the cutter head of this embodiment can be suitable for cut objects with a larger diameter (for example, greater than 40 mm).

[0023] The above and other objects, features and advantages of the present disclosure will be more fully understood from the detailed description given hereinafter and the accompanying drawings, which are given by way of illustration only and thus are not to be considered as limiting the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The features and advantages of one or more embodiments of the present disclosure will become more readily understood through the following description with reference to the accompanying drawings, in which:

[0025] Figure 1 1 is a schematic diagram of the overall structure of a cutter head according to a first embodiment of the present disclosure, wherein the cutter head is in an open state;

[0026] Figure 2 is a partial cross-sectional view of the cutter head according to the first embodiment of the present disclosure, wherein the movable blade is rotated toward the fixed blade to a certain extent;

[0027] Figure 3 1 is a schematic diagram of the overall structure of a cutter head according to a first embodiment of the present disclosure, wherein the cutter head is in a closed state;

[0028] Figure 4 is an exploded schematic diagram of a cutter head according to a first embodiment of the present disclosure;

[0029] Figure 5 is a schematic diagram of another connection method between the fixed blade and the sleeve;

[0030] Figure 6 An exploded diagram of another connection method between the fixed blade and the sleeve;

[0031] Figure 7is a partial cross-sectional view of an alternative embodiment of the cutter head according to the first embodiment of the present disclosure;

[0032] Figure 8 is a schematic diagram of a stationary blade according to a first embodiment of the present disclosure;

[0033] Figure 9 1 is a schematic diagram of the overall structure of a cutter head according to a second embodiment of the present disclosure, wherein the cutter head is in an open state;

[0034] Figure 10 1 is a schematic diagram of the overall structure of a cutter head according to a second embodiment of the present disclosure, wherein the cutter head is in a closed state;

[0035] Figure 11 is an exploded schematic diagram of a stationary blade according to a second embodiment of the present disclosure;

[0036] Figure 12 is a schematic structural diagram of a fixed blade according to a second embodiment of the present disclosure;

[0037] Figure 13 is a schematic structural diagram of an alternative embodiment of a fixed blade according to the second embodiment of the present disclosure;

[0038] Figure 14 Schematic diagram of the cutting tool structure. DETAILED DESCRIPTION

[0039] The following detailed description of the present disclosure is for illustrative purposes only and is in no way intended to limit the present disclosure and its applications or uses. The embodiments described in this specification are not exhaustive and are merely some of a plurality of possible embodiments. The exemplary embodiments may be implemented in many different forms and should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known technologies may not be described in detail.

[0040] One aspect of the utility model discloses a cutter head for a cutting tool.

[0041] The following will refer to Figures 1 to 8 A tool head 100 according to a first embodiment of the present disclosure will be described. Like reference numerals refer to like parts and / or components throughout the several drawings.

[0042] Figure 1 Schematic diagram of the overall structure of the cutter head, wherein the movable blade is away from the fixed blade, that is, the cutter head is in an open state; Figure 2 It is a partial cross-sectional view of the cutter head, wherein the movable blade is rotated to a certain extent toward the fixed blade; Figure 3Schematic diagram of the overall structure of the cutter head, wherein the movable blade and the fixed blade are in a combined state, that is, the cutter head is in a closed state; Figure 4 This is a schematic diagram of the explosion of the cutter head; Figure 5 is a schematic diagram of another connection method between the fixed blade and the sleeve; Figure 6 An exploded diagram of another connection method between the fixed blade and the sleeve; Figure 7 A partial cross-sectional view of an optional embodiment of a cutter head; Figure 8 Schematic diagram of a fixed blade.

[0043] like Figures 1 to 4 As shown, the cutter head 100 includes a fixed blade 1, a movable blade 2, a bracket 3 and a sleeve 4. The lower end of the fixed blade 1 is fixed on the sleeve 4, one side of the lower end of the movable blade 2 is rotatably connected to the fixed blade 1, and the other side of the lower end of the movable blade 2 is connected to the bracket 3 through a pin 9. The bracket 3 is connected to a rod 6 installed in the sleeve 4, and as the rod 6 moves up and down, the bracket 3 moves up and down relative to the sleeve 4. The up and down movement of the rod 6 drives the pin 9 connecting the movable blade 2 and the bracket 3 to move left and right relative to the bracket in the elongated second hole 31 of the bracket 3, and causes the movable blade 2 to rotate relative to the fixed blade 1, so that the movable blade 2 can cut the object to be cut between the movable blade 2 and the fixed blade 1, or causes the movable blade 2 to withdraw from the cutting position.

[0044] In this embodiment, the movable blade 2 rotates relative to the fixed blade 1 through the up and down movement of the rod 6, and the rod 6 does not need to move left and right, so that the power device (such as a hydraulic cylinder, etc.) that provides power to the rod 6 only needs to provide vertical force to the rod 6, and does not need to provide left and right force, thereby avoiding the reduction in operational reliability of the power device that may be caused by multi-directional movement (for example, left and right movement causes wear on the sealing device of the hydraulic cylinder, thereby causing hydraulic oil leakage), so that the operation reliability of the cutter head 100 is higher.

[0045] Specifically, if Figure 2 and Figure 4 As shown, the fixed blade 1 is connected to the sleeve 4 via the first mounting portion 41 of the sleeve 4. Exemplarily, the first mounting portion 41 includes a first mounting plate 411 and a second mounting plate 412 that are parallel to each other and spaced a certain distance apart. The distance between the first mounting plate 411 and the second mounting plate 412 is equal to or slightly greater than the thickness of the lower end of the fixed blade 1, and the lower end of the fixed blade 1 is located in the gap between the first mounting plate 411 and the second mounting plate 412. The fixed blade 1 is connected to the first mounting portion 41 by a connecting device (e.g., a bolt, a pin, etc.). In order to prevent the fixed blade 1 from rotating relative to the first mounting portion 41, at least two connecting devices are provided, and the two connecting devices can be the same or different.

[0046] It should be understood that the connection manner between the fixed blade 4 and the sleeve 4 should not be limited to the specific examples described above, but may be varied as long as it can achieve the functions described herein.

[0047] For example, Figure 5 As shown, the sleeve 4 does not include the first mounting portion 41, and the fixed blade 1 and the sleeve 4 can be an integral structure. Figure 6 As shown, the first mounting plate 411 and the second mounting plate 412 are an integrated structure, and the fixed blade 1 is connected to the first mounting portion 41 via two pins.

[0048] Furthermore, if Figure 2 and Figure 4 As shown, the sleeve 4 also includes a second mounting portion 42, and the first mounting portion 41 and the second mounting portion 42 are an integrated structure. The second mounting portion 42 is a hollow cylindrical structure, and the rod 6 is installed in the second mounting portion 42 and connected to the bracket 3. Figure 2 and Figure 4 As shown, the bracket 3 and the rod 6 are connected by bolts 10. It should be understood that the connection method between the bracket 3 and the rod 6 is not limited to the specific example shown in the figure. For example, they can also be connected by welding, or the bracket 3 and the rod 6 can also be an integral structure.

[0049] Furthermore, if Figure 2 As shown, a first step 421 is provided in the second mounting portion 42. The diameter of the lower end of the rod 6 is larger than the diameter of the remaining portion, forming a second step 62. An elastic member, shown as a spring 5, is provided between the first step 421 and the second step 62. The arrangement of the spring 5 ensures that when an upward force is applied to the rod 6, the force can be gradually and evenly applied to the bracket 3, and the spring 5 can provide a certain amount of assistance when the rod 6 moves downward.

[0050] It should be understood that the structure of the sleeve 4 should not be limited to the specific examples shown in the figures, but may be varied as long as it can achieve the functions described herein.

[0051] In order to enable the movable blade 2 to rotate relative to the fixed blade 1 by the up and down movement of the rod 6, the movable blade 2 is rotatably connected to the fixed blade 1 via a shaft 7 and a nut 8, for example. Figure 4 As shown, a third hole 11 and a fourth hole 21 are respectively provided at corresponding positions of the fixed blade 1 and the movable blade 2 , and the shaft 7 passes through the third hole 11 and the fourth hole 21 and is fixed by a nut 8 .

[0052] It should be understood that the connection manner of the fixed blade 1 and the movable blade 2 should not be limited to the specific example shown in the figures, but may be varied as long as it can achieve the functions described herein.

[0053] Furthermore, the lower end of the movable blade 2 is provided with a first hole 22, and the bracket 3 is provided with a second hole 31. The first hole 22 and the second hole 31 are connected by a pin 9. The second hole 31 is an elongated hole. When the rod 6 moves up and down, the pin 9 can move left and right along the elongated hole, thereby driving the movable blade 2 to rotate around the fixed blade 1. Figures 1 to 3 shown.

[0054] Alternatively, as Figure 7 As shown, the first hole 22 is an elongated hole, and the second hole 31 is a circular hole.

[0055] In the present embodiment, the shape of the blade portion 23 of the movable blade 2 is in the form of one or more of an Archimedean spiral, a Fibonacci spiral, and an involute, so that when the cutter head 100 is in the open position (the movable blade 2 is away from the fixed blade 1), the distance between the movable blade 2 and the fixed blade 1 gradually increases from the connection point of the movable blade 2 and the fixed blade 1 to the tip of the blade. The arrangement of the cutter head 100 with this structure makes it easier for the cutter head 100 to exit the cutting position when the cutter head 100 is stuck. In addition, the arrangement of the cutter head 100 makes it easier for the distance between the movable blade 2 and the fixed blade 1 to be larger when the cutter head 100 is in the open position, so that the cutter head 100 of the present embodiment can be suitable for cut objects with a larger diameter (for example, greater than 40 mm).

[0056] In addition, the cutter head 100 of this embodiment is only provided with the cutting edge portion 23 on the movable blade 2, which further makes the cutter head 100 of this embodiment less likely to get stuck during the cutting process. The support surface 12 of the fixed blade 1 opposite to the cutting edge portion 23 is a rough surface.

[0057] In a preferred embodiment of this embodiment, Figure 8 As shown, the support surface 12 of the fixed blade 1 is provided with anti-slip teeth having a concave-convex structure, which further reduces the risk of the cut object being stuck during the cutting process.

[0058] In this embodiment, in order to prevent the movable blade 2 from rotating around the fixed blade 1 beyond the expected range when the force applied to the rod 6 is too large, the movable blade 2 is provided with a stopper 24. Figure 3 As shown, when the cutter head 100 is in the closed position, the stopper 24 abuts against the bracket 3 to limit the further rotation of the movable blade 2 toward the stationary blade 1 .

[0059] In this embodiment, the blade portion 23 of the movable blade 2 may be provided with a sharp portion for cutting on one side or both sides of the movable blade 2 .

[0060] The following will refer to Figure 9-13 A tool head 100' according to a second embodiment of the present disclosure will be described. Figure 9-13, similar reference numerals as above denote similar parts and / or components.

[0061] Figure 9 Schematic diagram of the overall structure of the cutter head 100 ′, wherein the movable blade is away from the fixed blade, that is, the cutter head 100 ′ is in an open state; Figure 10 1 is a schematic diagram of the overall structure of the cutter head 100 ′, wherein the movable blade and the fixed blade are in a combined state, that is, the cutter head is in a closed state; Figure 11 Schematic diagram of the explosion of the fixed blade; Figure 12 It is a schematic diagram of the structure of the fixed blade; Figure 13 Schematic diagram of the structure of an optional embodiment of a fixed blade.

[0062] Different from the first embodiment, the upper end of the fixed blade 1' of the cutter head 100' of this embodiment has a groove 13, such as Figure 10 As shown, when the cutter head 100 ′ is in the closed position, at least a portion of the cutting edge 23 of the movable blade 2 is received in the slot 13 of the stationary blade.

[0063] like Figures 11 to 12 As shown, the stationary blade 1' includes a first portion 20 and a second portion 30 that are parallel to each other, connected by a connecting device. The first portion 20 and the second portion 30 are spaced a certain distance apart, thereby forming a groove 13 between the first portion 20 and the second portion 30. When the cutter head 100' is in the closed position, at least a portion of the cutting edge 23 of the movable blade 2 is accommodated in the groove 13.

[0064] Alternatively, as Figure 13 As shown, the lower end of the fixed blade 1 ′ is an integral structure, and the upper end of the fixed blade 1 ′ is provided with a groove 13 . When the cutter head 100 ′ is in the closed position, at least a portion of the cutting edge 23 of the movable blade 2 is accommodated in the groove 13 .

[0065] The cutter head 100 ′ of this embodiment has the same technical effects as the cutter head 100 of the first embodiment, and will not be described in detail here.

[0066] Another aspect of the present invention is as follows Figure 14 As shown, a cutting tool is provided, which includes the cutter head 100 or 100' and a power device as described in the above technical solution.

[0067] In a preferred embodiment of the present invention, the power device is a hydraulic cylinder 200, which is connected to the sleeve 4. The telescopic movement of the hydraulic rod (not shown in the figure) of the hydraulic cylinder 200 drives the rod 6 to move up and down, thereby driving the movable blade 2 to rotate around the fixed blade 1 or 1'.

[0068] In this embodiment, the hydraulic rod only moves up and down without moving left and right, avoiding possible wear of the sealing device of the hydraulic cylinder caused by the action and movement of the hydraulic rod, thereby avoiding leakage of hydraulic oil in the hydraulic cylinder 200 and increasing the reliability of the cutting tool operation.

[0069] In addition, the cutting tool can be remotely controlled based on the remote control of the hydraulic cylinder 200. The control device for remotely controlling the hydraulic cylinder 200 can be any control device in the prior art that can achieve the functions described herein, and the control device does not constitute a part of the present invention that needs to be protected.

[0070] Although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the specific embodiments described and illustrated in detail herein. Those skilled in the art may make various modifications to the exemplary embodiments without departing from the scope defined by the claims. Features from various embodiments may be combined with one another where not inconsistent. Alternatively, certain features from an embodiment may be omitted.

Claims

1. A cutter head for a cutting tool, characterized in that: The cutter head includes a fixed blade, a movable blade, a bracket and a sleeve, the lower end of the fixed blade is fixed on the sleeve, one side of the lower end of the movable blade is rotatably connected to the fixed blade, the other side of the lower end of the movable blade is connected to the bracket, the bracket is connected to a rod installed in the sleeve, the bracket moves up and down relative to the sleeve as the rod moves up and down, and the movable blade can rotate relative to the fixed blade as the bracket moves up and down.

2. The cutter head according to claim 1, characterized in that The sleeve includes a first mounting portion, and the fixed blade is connected to the sleeve through the first mounting portion.

3. The cutter head according to claim 1, wherein: The fixed blade and the sleeve are an integrated structure.

4. The cutter head according to any one of claims 1 to 3, characterized in that The sleeve includes a second mounting portion, which is a hollow cylindrical structure. The rod is mounted in the second mounting portion and connected to the bracket.

5. The cutter head according to claim 4, characterized in that A first step portion is provided in the second mounting portion, a second step portion is provided in the rod, and a spring is provided between the first step portion and the second step portion.

6. The cutter head according to claim 1, wherein: A first hole is provided at the lower end of the movable blade, and a second hole is provided on the bracket. The first hole and the second hole are connected by a pin. The first hole is a circular hole, and the second hole is an elongated hole.

7. The cutter head according to claim 1, characterized in that A first hole is provided at the lower end of the movable blade, and a second hole is provided on the bracket. The first hole and the second hole are connected by a pin. The first hole is an elongated hole, and the second hole is a circular hole.

8. The cutter head according to any one of claims 1-3, 5-7, characterized in that: The shape of the blade portion of the movable blade is one or more of an Archimedean spiral, a Fibonacci spiral and an involute.

9. The cutter head according to claim 8, characterized in that The supporting surface of the fixed blade opposite to the blade edge portion is provided with anti-slip teeth having a concave-convex structure.

10. The cutter head according to claim 8, characterized in that The upper end of the fixed blade has a groove, and when the cutter head is in the closed position, at least a portion of the cutting edge portion of the movable blade is accommodated in the groove of the fixed blade.

11. The cutter head according to claim 10, characterized in that The stationary blade includes a first portion and a second portion that are parallel to each other, and the slot is formed between the first portion and the second portion.

12. The cutter head according to claim 10, wherein: The lower end of the fixed blade is an integral structure.

13. A cutting tool, characterized in that: The cutting tool comprises a cutter head according to any one of claims 1 to 12 and a power device.

14. The cutting tool according to claim 13, characterized in that The power device is a hydraulic cylinder, which is connected to the sleeve of the cutter head so that the hydraulic rod of the hydraulic cylinder drives the rod of the cutter head.

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