Freely adjustable scissor head structure and electric scissors

Abstract

The utility model discloses a freely adjustable scissor head structure and electric scissors, which comprise a knife holder and a fixed knife arranged on the knife holder, the fixed knife is provided with a movable knife mechanism which is matched with the fixed knife and used for shearing, the movable knife mechanism is connected with the fixed knife through a connecting piece, and the movable knife mechanism is connected with the fixed knife through the connecting piece. One end of the connecting piece is arranged on the cutter holder, the cutter holder is provided with a free adjusting mechanism used for adjusting the gap between the cutter holder and the fixed cutter, and the gap between the fixed cutter and the movable cutter mechanism is adjusted through the position of the free adjusting mechanism. Comprise a scissor body, and the scissor body is provided with the freely-adjustable scissor head structure. On the basis that original shearing is kept, the skin clamping phenomenon caused by insufficient folding of the movable blade and the fixed blade due to the fact that the knife edge distance between the movable blade and the fixed blade is increased after existing scissors work for a long time can be avoided, the problem of industrial pain points is solved, and practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a freely adjustable scissor head structure and an electric scissor. Background Technology

[0002] Electric shears are a common power tool used for cutting branches, wood strips, and similar materials. They typically consist of a moving blade, a fixed blade, a motor, and a transmission mechanism that transmits power from the motor to the moving blade. The moving blade rotates relative to the fixed blade under the drive of the motor to complete the cutting action. However, after prolonged use, the distance between the moving and fixed blades increases, resulting in insufficient closing space between them. This leads to bark entrapment (the heartwood breaks off while the bark remains attached), ultimately hindering the shears' effectiveness. This problem is a common issue in the industry, and currently, there is no effective technological solution. Utility Model Content

[0003] (a) Technical problems that need to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a freely adjustable scissor head structure and electric scissors. While maintaining the original cutting function, it overcomes the problem that occurs when existing scissors work for a long time, resulting in an increased blade distance between the moving and fixed blades, which leads to insufficient closing of the moving and fixed blades (upper and lower blades) and bark jamming (the heartwood breaks while the bark remains attached). This solves a pain point in the industry and is more practical.

[0005] (II) Technical solutions required

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A freely adjustable scissor head structure includes a blade holder and a fixed blade disposed on the blade holder. The fixed blade is provided with a movable blade mechanism that cooperates with the fixed blade for cutting. The movable blade mechanism is connected to the fixed blade by a connecting member, one end of which is disposed on the blade holder. The blade holder is provided with a freely adjustable mechanism for adjusting the gap between the fixed blade and the fixed blade. The gap between the fixed blade and the movable blade mechanism can be adjusted by adjusting the position of the freely adjustable mechanism.

[0008] Preferably, the free adjustment mechanism includes a fixed seat disposed on the tool holder, the fixed seat being located below the fixed tool, and the upper end face of the fixed seat contacting the lower end face of the fixed tool. The fixed seat is provided with a fixing hole, and the tool holder is provided with a mounting hole. The mounting hole and the fixing hole are connected together by a fastener, and the diameter of the mounting hole is larger than the diameter of the fixing hole.

[0009] Preferably, there are at least two mounting holes and at least two fixing holes, and correspondingly, there are also two fixing members.

[0010] Preferably, there are three mounting holes and three fixing holes, and correspondingly, there are three fixing members, each of which connects one mounting hole and one fixing hole together.

[0011] Preferably, the mounting hole is elliptical.

[0012] Preferably, the fastener is a screw or bolt.

[0013] Preferably, the side of the fixed base that contacts the fixed blade is provided with an arc-shaped groove.

[0014] Preferably, the moving blade mechanism includes a moving blade disposed on the fixed blade, the moving blade rotating back and forth around the connecting member as a fulcrum, a rocker arm disposed on the connecting member on the outer surface of the moving blade, a meshing tooth disposed on one end of the rocker arm, a connecting shaft disposed on the other end of the rocker arm, the moving blade being fixedly connected to the connecting shaft, and an output gear disposed on the tool holder, the output gear meshing with the meshing tooth for transmission, and a large disc gear disposed on the tool holder, the output gear being disposed on the large disc gear.

[0015] Preferably, the connector includes a shaft for connecting the tool holder, the fixed tool, and the moving tool mechanism together in series. A nut is provided on the shaft of the moving tool mechanism, and a screw is provided on the nut for fixing and locking. A plane bearing is provided between the nut and the moving tool mechanism, and washers are provided on the screw and the nut.

[0016] In addition, this utility model also provides an electric scissor, including a scissor body, on which a freely adjustable scissor head structure as described above is provided.

[0017] (III) Technical Effects to be Achieved

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] Firstly, the blade holder of this utility model is equipped with a free adjustment mechanism for adjusting the gap between the fixed blade and the moving blade. The position of the free adjustment mechanism is used to adjust the gap between the fixed blade and the moving blade mechanism. While maintaining the original shearing function, it can also overcome the phenomenon that after long-term operation of existing scissors, the distance between the blade edges of the moving blade and the fixed blade increases, resulting in insufficient closing of the moving blade and the fixed blade (upper and lower blades) and the bark getting stuck (the heartwood breaks but the bark remains). This solves the pain point of the industry, is more practical, has great market value, and at the same time maintains a simple structure, is easy to manufacture, and greatly reduces the production cost.

[0020] Secondly, this utility model includes a scissor body, on which a freely adjustable scissor head structure as described above is provided. When applied to electric scissors, this is beneficial in overcoming the problem that after prolonged use of existing scissors, the distance between the moving blade and the fixed blade increases, resulting in insufficient closing of the moving blade and the fixed blade (upper and lower blades) and causing bark to be caught (the heartwood breaks while the bark remains attached). This solves a pain point in the industry, is more practical, and has great market value. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the front view of a freely adjustable scissor head structure according to this utility model.

[0022] Figure 2 This is a rear view schematic diagram of a freely adjustable scissor head structure according to this utility model.

[0023] Figure 3 for Figure 1 Diagram showing the right-center view.

[0024] Figure 4 This is a schematic diagram of the overall structure of a freely adjustable scissor head according to this utility model.

[0025] Figure 5 This is an exploded view of the freely adjustable scissor head structure of this utility model.

[0026] In the diagram: 1, tool holder; 2, fixed tool; 3, moving tool mechanism; 4, connecting piece; 5, free adjustment mechanism; 6, trigger holder; 11, mounting hole; 31, moving blade; 32, rocker arm; 33, meshing gear; 34, connecting shaft; 35, output gear; 36, large disc gear; 41, shaft body; 42, nut; 43, screw; 44, surface bearing; 45, washer; 51, fixed seat; 52, fixing piece; 61, wrench; 511, fixing hole. Detailed Implementation

[0027] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0028] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0031] Example 1: See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A freely adjustable scissor head structure includes a blade holder 1 and a fixed blade 2 mounted on the blade holder 1. The fixed blade 2 is equipped with a moving blade mechanism 3 that cooperates with the fixed blade 2 for cutting. The moving blade mechanism 3 is connected to the fixed blade 2 by a connector 4, with one end of the connector 4 mounted on the blade holder 1. The blade holder 1 is equipped with a free adjustment mechanism 5 for adjusting the gap between the fixed blade 2 and the moving blade mechanism 3. The gap between the fixed blade 2 and the moving blade mechanism 3 can be adjusted by adjusting the position of the free adjustment mechanism 5. This structure is used to address the problem that occurs after the scissors have been working for a long time, when the distance between the blades of the moving blade and the fixed blade increases, resulting in insufficient closing of the moving blade and the fixed blade (upper and lower blades) and the resulting bark jamming (the heartwood breaks while the bark remains connected). This solves a pain point in the industry and has huge market value.

[0032] Example 2: This can be explained based on Example 1, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the free adjustment mechanism 5 includes a fixed seat 51 mounted on the blade holder 1. The fixed seat 51 is located below the fixed blade 2, and its upper end face contacts the lower end face of the fixed blade 2. The fixed seat 51 has a fixing hole 511, while the blade holder 1 has a mounting hole 11. The mounting hole 11 and the fixing hole 511 are connected together by a fastener 52. The diameter of the mounting hole 11 is larger than that of the fixing hole 511. This arrangement helps to ensure that the blade holder 1 can still move even when the fastener 52 fixes the fixed seat 51 and the blade holder 1 together. This allows the fixed blade 2 to move slightly with the fine adjustment of the blade holder 1, thus helping to overcome the phenomenon that after the scissors have been working for a long time, the distance between the moving blade and the fixed blade increases, resulting in insufficient closing of the moving blade and the fixed blade (upper and lower blades) and the resulting bark jamming (the heartwood breaks, but the bark remains). This compensates for the gap between the fixed blade 2 and the moving blade mechanism 3. The gap that occurs after prolonged reduction in speed is typically 3 to 5 millimeters between the fixed blade 2 and the moving blade mechanism 3 in actual operation. This can cause the fixed blade 2 and the moving blade mechanism 3 to not close properly, resulting in bark trapping (the heartwood breaks off while the bark remains attached). Now, it is only necessary to loosen the fixing part 52 and then slightly move the blade holder 1 and the moving blade mechanism 3 relative to each other. This will compensate for the 3 to 5 millimeter gap between the fixed blade 2 and the moving blade mechanism 3. Since the movement distance is small, it will not affect the structure or the operating effect. Then, the fixing part 52 can be locked. This not only maintains the shearing function but also overcomes the problem of the increased blade distance between the moving and fixed blades after prolonged operation of existing shears, which leads to insufficient closing of the moving and fixed blades (upper and lower blades) and the resulting bark trapping (the heartwood breaks off while the bark remains attached). This solves a pain point in the industry and is more practical.

[0033] Among them, such as Figure 5As shown, there are at least two mounting holes 11 and fixing holes 511, and correspondingly, two fasteners 52 are also used, which helps to make the connection more stable. In this example, however, three mounting holes 11 and fixing holes 511 are used, and correspondingly, three fasteners 52 are used, with each fastener 52 connecting one mounting hole 11 and one fixing hole 511 together.

[0034] Among them, such as Figure 5 As shown, the mounting hole 11 is elliptical. This not only helps the tool holder 1 to remain aligned with the fixing hole 511 after it moves, thus facilitating the serial installation of the fixing part 52, but also allows for adjustment along the long axis of the elliptical mounting hole 11 while preventing wobbling along the short axis of the elliptical mounting hole 11, making it more convenient to meet the needs.

[0035] Among them, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the fastener 52 is a screw or bolt, which is convenient to implement.

[0036] Among them, such as Figure 5 As shown, the fixed base 51 has an arc-shaped groove on the side that contacts the fixed blade 2, which is more conducive to contact with the fixed blade 2.

[0037] When using it, first loosen the fixing piece 52, then adjust the gap between the micro-adjustment blade holder 1 and the moving blade mechanism 3. Make fine adjustments as needed to help overcome the problem of the blade distance between the moving blade and the fixed blade increasing after the scissors have been working for a long time. Then, fix and lock it with the fixing piece 52. Ordinary users can operate it, which is convenient for users.

[0038] Example 3: This can be described based on Example 1 or Example 2, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the moving blade mechanism 3 includes a moving blade 31 mounted on the fixed blade 2. The moving blade 31 rotates back and forth around the connecting member 4. A rocker arm 32 is mounted on the connecting member 4 on the outer surface of the moving blade 31. A meshing tooth 33 is mounted on one end of the rocker arm 32, and a connecting shaft 34 is mounted on the other end of the rocker arm 32. The connecting shaft 34 is fixedly connected to the moving blade 31 and an output gear 35 mounted on the blade holder 1. The output gear 35 meshes with the meshing tooth 33 for transmission. A large disc gear 36 is mounted on the blade holder 1, and the output gear 35 is mounted on the large disc gear 36. This structure, by using the connecting shaft 35 as a fulcrum and the rocker arm 32 swinging back and forth, facilitates the opening and shearing of the moving blade 31 and the fixed blade 2. In this embodiment, the large disc gear 36 is located on the other side of the tool holder 1 corresponding to the output gear 35. The large disc gear 36 passes through the tool holder 1 and is connected to the output gear 35. The large disc gear 36 drives the output gear 35, and then the output gear 35 drives the rocker arm 32. The rocker arm 32 eventually drives the moving blade 31 to move back and forth. This opening and closing of the moving blade 31 and the fixed blade 2 realizes shearing.

[0039] Among them, such as Figure 5 As shown, the area of ​​one end of the rocker arm 32 located on the meshing tooth 33 is larger than the area of ​​one end of the rocker arm 32 located on the connecting shaft 34. This arrangement is reasonable and helps the output gear 35 to drive the rocker arm 32 to swing back and forth better. It also helps to reduce the space occupied by the rocker arm 32 located on the connecting shaft 34, making it more convenient for users to use.

[0040] The connecting shaft 35 uses screws or bolts, which is convenient to implement.

[0041] Example 4: This can be described based on Example 1, Example 2, or Example 3, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the connecting member 4 includes a shaft 41 for connecting the tool holder 1, the fixed tool 2 and the moving tool mechanism 3 together. A nut 42 is provided on the shaft 41 of the moving tool mechanism 3, and a screw 43 is provided on the nut 42 for fixing and locking. A plane bearing 44 is provided between the nut 42 and the moving tool mechanism 3. A washer 45 is provided on the screw 43 and the nut 42. This arrangement is reasonable, facilitates disassembly and installation, and can better connect the tool holder 1, the fixed tool 2 and the moving tool mechanism 3 together.

[0042] Example 5: This can be described based on Example 1, Example 2, Example 3, or Example 4, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, it also includes a trigger seat 6 disposed on the knife holder 1, and a wrench 61 disposed on the trigger seat 6. This arrangement is reasonable and easy to implement. The trigger seat 6 and the trigger base 6 are used for finger pressing to drive the operation. This is a technology known to those skilled in the art, and will not be described in detail here.

[0043] Example 6: Based on Example 1, Example 2, Example 3, Example 4, or Example 5, this utility model also provides an electric scissor, including a scissor body with a freely adjustable scissor head structure as described above. By using the electric scissor, while maintaining the original cutting function, it can overcome the problem that after long-term operation of existing scissors, the distance between the moving blade and the fixed blade increases, resulting in insufficient closing of the moving blade and the fixed blade (upper and lower blades) and causing bark to be caught (the heartwood breaks while the bark remains attached). This solves a pain point in the industry, is more practical, and has greater market value.

[0044] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts and rivets that are mature in the existing technology. The internal components of the multi-point scissors all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete the normal operation of them by referring to the existing technical manual. In addition, the circuit connection adopts conventional connection methods in the existing technology, and will not be described in detail here.

[0045] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A freely adjustable scissor head structure, comprising a blade holder (1) and a fixed blade (2) disposed on the blade holder (1), wherein the fixed blade (2) is provided with a moving blade mechanism (3) for cutting in cooperation with the fixed blade (2), the moving blade mechanism (3) and the fixed blade (2) are connected by a connecting member (4), and one end of the connecting member (4) is disposed on the blade holder (1), characterized in that: The tool holder (1) is provided with a free adjustment mechanism (5) for adjusting the gap between the fixed tool (2) and the tool holder (3). The gap between the fixed tool (2) and the moving tool mechanism (3) can be adjusted by adjusting the position of the free adjustment mechanism (5). The free adjustment mechanism (5) includes a fixed seat (51) provided on the tool holder (1). The fixed seat (51) is located below the fixed tool (2), and the upper end face of the fixed seat (51) is in contact with the lower end face of the fixed tool (2). The fixed seat (51) is provided with a fixing hole (511), and the tool holder (1) is provided with a mounting hole (11). The mounting hole (11) and the fixing hole (511) are connected together by a fastener (52), and the diameter of the mounting hole (11) is larger than the diameter of the fixing hole (511).

2. The freely adjustable scissor head structure as described in claim 1, characterized in that: There are at least two mounting holes (11) and at least two fixing holes (511), and correspondingly, there are also two fixing members (52).

3. The freely adjustable scissor head structure as described in claim 2, characterized in that: The mounting hole (11) and the fixing hole (511) are three in number. Correspondingly, the fixing member (52) is three in number. Each fixing member (52) connects one mounting hole (11) and one fixing hole (511) together.

4. The freely adjustable scissor head structure as described in claim 1, 2, or 3, characterized in that: The mounting hole (11) is elliptical.

5. The freely adjustable scissor head structure as described in claim 1, 2, or 3, characterized in that: The fastener (52) is a screw or bolt.

6. The freely adjustable scissor head structure as described in claim 1, 2, or 3, characterized in that: An arc-shaped groove is provided on the side of the fixed base (51) that contacts the fixed blade (2).

7. The freely adjustable scissor head structure as described in claim 1, 2, or 3, characterized in that: The moving blade mechanism (3) includes a moving blade (31) mounted on the fixed blade (2). The moving blade (31) rotates back and forth with the connecting member (4) as the fulcrum. A rocker arm (32) is mounted on the connecting member (4) on the outer surface of the moving blade (31). A meshing tooth (33) is mounted on one end of the rocker arm (32). A connecting shaft (34) is mounted on the other end of the rocker arm (32). The moving blade (31) is fixedly connected to the connecting shaft (34). An output gear (35) is mounted on the tool holder (1). The output gear (35) meshes with the meshing tooth (33) for transmission. A large disc gear (36) is mounted on the tool holder (1). The output gear (35) is mounted on the large disc gear (36).

8. The freely adjustable scissor head structure as described in claim 1, 2, or 3, characterized in that: The connector (4) includes a shaft (41) for connecting the tool holder (1), fixed tool (2) and moving tool mechanism (3) together. A nut (42) is provided on the shaft (41) of the moving tool mechanism (3). A screw (43) is provided on the nut (42) for fixing and locking. A plane bearing (44) is provided between the nut (42) and the moving tool mechanism (3). A washer (45) is provided on the screw (43) and the nut (42).

9. An electric scissor, comprising a scissor body, characterized in that: The scissors body is provided with a freely adjustable scissor head structure as described in any one of claims 1 to 8.

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