SCRATCHING MECHANISM AND GARDEN SHEARS

Abstract

Shearing mechanism, the shearing mechanism comprising: a mounting frame (900); a first shearing arrangement (100), wherein the first shearing arrangement (100) comprises a first actuating arm (110) rotatably arranged on the mounting frame (900) and a first shearing section (120) rotatably arranged on the mounting frame (900), wherein a first driving toothing (111) is provided on the first actuating arm (110), and wherein a first driven toothing (121) is provided on the first shearing section (120) which engages with the first driving toothing (111); a second shearing arrangement (200), wherein the second shearing arrangement (200) comprises a second actuating arm (210) rotatably arranged on the mounting frame (900) and a second shearing section (220) rotatably arranged on the mounting frame (900), wherein a second driving toothing (211) is provided on the second actuating arm (210), and wherein a second driven toothing (221) is provided on the second shearing section (220) which engages with the second driving toothing (211); and a coupling mechanism, wherein the coupling mechanism is arranged between the first actuating arm (110) and the second actuating arm (210) in order to be able to set the first actuating arm (110) and the second actuating arm (210) into synchronous rotation in opposite directions with respect to the mounting frame (900), or wherein the coupling mechanism is arranged between the first shear section (120) and the second shear section (220) in order to be able to set the first shear section (120) and the second shear section (220) into synchronous rotation in opposite directions with respect to the mounting frame (900), and wherein the coupling mechanism comprises a sliding element arranged slidably on the mounting frame (900), and wherein the first shear section (120) and the second shear section (220) are each provided with a sliding structure slidably fitted to the sliding element, characterized in that the sliding element is a sliding pin (910), wherein the mounting frame (900) is provided with a guide sliding groove (901) that slidably fits the sliding pin (910), and wherein the first shear section (120) and the second shear section (220) are each provided with a coupling sliding groove (101) that slidably fits the sliding pin (910).

Description

TECHNICAL AREA

[0001] The invention relates to the technical field of garden tools, and in particular a shearing mechanism and garden shears. STATE OF THE ART

[0002] In conventional garden shears, the cutting section is typically directly connected to the handle, so the opening of the cutting mechanism is controlled by the handle opening. This design offers a simple structure and low production costs, but it doesn't save any effort. To reduce effort, some garden shears utilize a connecting rod mechanism or a modified connecting rod-sliding block mechanism. For example, the Chinese utility model "Force-Saving Coupling Mechanism for Garden Shears" (Chinese publication number CN 2 10 053 945 U) employs a structure consisting of multiple connecting rods and modified sliding pairs to save effort. However, this design features a complex structure and cumbersome connections, which negatively impacts production and assembly.

[0003] DE20219648U1 discloses a pair of garden shears with two handles, two blades, two pivot plates, and two actuating plates. The actuating plates are connected to the handles at one lower end and have a toothed section at one upper end. The two actuating plates, together with the two pivot plates, are rotatably mounted on a pivot. The two blades have a toothed section at one lower end and are pivoted together with the two pivot plates by a further pivot, so that the toothed sections of the two blades engage with the toothed sections of the two actuating plates, resulting in a gear-like power transmission from the handles to the blades. CONTENT OF THE INVENTION

[0004] The object of the invention is to solve at least one of the problems in the prior art. To this end, the invention provides a shearing mechanism with a simple structure.

[0005] The present invention also provides garden shears.

[0006] The shearing mechanism according to an embodiment in a first aspect of the invention comprises a mounting frame, a first shearing arrangement, a second shearing arrangement, and a coupling mechanism. The first shearing arrangement comprises a first actuating arm rotatably arranged on the mounting frame and a first shearing section rotatably arranged on the mounting frame, wherein a first driving tooth is provided on the first actuating arm and a first driven tooth is provided on the first shearing section, engaging with the first driving tooth.The second shearing arrangement comprises a second actuating arm rotatably mounted on the mounting frame and a second shearing section rotatably mounted on the mounting frame, wherein the second actuating arm is provided with a second driving tooth and the second shearing section with a second driven tooth engaging with the second driving tooth. The coupling mechanism is arranged between the first actuating arm and the second actuating arm to enable the first actuating arm and the second actuating arm to rotate synchronously in opposite directions relative to the mounting frame. Alternatively, the coupling mechanism is arranged between the first shearing section and the second shearing section to enable the first shearing section and the second shearing section to rotate synchronously in opposite directions relative to the mounting frame.

[0007] The shearing mechanism according to the embodiment of the invention has at least the following advantages: The force-transmitting device, using toothing, allows for different ratios of tooth numbers to be set as needed, in order to save force or control the size of the opening. Thus, the force-transmitting device has a simple, compact, and suitable structure, and it is inexpensive to manufacture and can be installed in a smaller installation space.

[0008] The coupling mechanism enables relative coupling between the first shearing arrangement and the second shearing arrangement, which facilitates the control of the shearing by the shearing mechanism.

[0009] In some embodiments of the invention, the coupling mechanism comprises a sliding element arranged slidably on the mounting frame, and the first shear section and the second shear section are each provided with a sliding structure slidably fitted to the sliding element in order to enable the coupling between the first shear section and the second shear section.

[0010] In some embodiments of the invention, the sliding element is a sliding pin, wherein the mounting frame is provided with a guide sliding groove that slidably fits the sliding pin, and wherein the first shear section and the second shear section are each provided with a coupling sliding groove that slidably fits the sliding pin in order to enable the fitting and thus the coupling of the sliding pin to the mounting frame, the first shear section and the second shear section.

[0011] In some embodiments of the invention, the mounting frame comprises an upper mounting plate and a lower mounting plate, wherein one end of the upper mounting plate is connected to one end of the lower mounting plate by a first connecting bolt and the other end of the upper mounting plate is connected to the other end of the lower mounting plate by a second connecting bolt, wherein the first actuating arm and the second actuating arm are arranged between the upper mounting plate and the lower mounting plate and are rotatably fitted to the first connecting bolt, and wherein the first shear section and the second shear section are arranged between the upper mounting plate and the lower mounting plate and are rotatably fitted to the second connecting bolt.

[0012] In some embodiments of the invention, both the upper and lower mounting plates are provided with the guide sliding groove. Both ends of the sliding pin are designed as guide heads, and a central portion of the sliding pin is designed as a coupling section. The diameter of the guide heads is larger than the diameter of the coupling section. The sliding pin is arranged between the upper and lower mounting plates. The two guide heads are each slidably fitted to the guide sliding grooves in the upper and lower mounting plates. The coupling section penetrates the coupling sliding grooves in the first and second shear sections and is slidably fitted to the coupling sliding grooves.The design of the sliding pin, with its smaller ends and larger center section, allows it to be positioned directly into a sliding mounting position during assembly of the mounting frame. Furthermore, it can be rotatably aligned with the first and second shear sections, resulting in a simple and efficient structure and convenient assembly.

[0013] In some embodiments of the invention, it is provided that the first connecting bolt sequentially penetrates the upper mounting plate, the first actuating arm, the second actuating arm and the lower mounting plate and is then connected with a screw nut to assemble the mechanisms on the first connecting bolt.

[0014] In some embodiments of the invention, it is provided that the second connecting bolt sequentially penetrates the upper mounting plate, the first shear section, the second shear section and the lower mounting plate and is then connected with a screw nut to assemble the mechanisms on the second connecting bolt.

[0015] The garden shears according to an embodiment in a second aspect of the invention comprise a shearing mechanism according to an embodiment in the first aspect of the invention and two handles, each of which is connected to the first actuating arm and the second actuating arm.

[0016] The garden shears according to the embodiment of the invention have at least the following advantages: They can meet the requirements for shearing in a garden and have a simple and appropriate structure. BRIEF DESCRIPTION OF THE CHARACTERS

[0017] The aforementioned and / or additional aspects and advantages of the invention will become clearer and easier to understand through the following description of the exemplary embodiments in conjunction with the figures. These show: Fig. Figure 1 is a schematic structural view of a shearing mechanism according to an embodiment of the invention; Fig. 2 is a schematic exploded view of a shearing mechanism according to an embodiment of the invention; Fig. Figure 3 is a schematic view of an internal structure of a closed shearing mechanism according to an embodiment of the invention; Fig. Figure 4 is a schematic view of the internal structure of an open shearing mechanism according to an embodiment of the invention; and Fig. Figure 5 is a schematic structural view of an opened shearing mechanism according to an embodiment of the invention. DETAILED EMBODIMENTS

[0018] The exemplary embodiments of the invention shown in the figures are described in more detail below. The same or similar reference numerals always designate the same or similar or functionally identical or similar elements. The following description of the exemplary embodiments with reference to the figures is exemplary and serves only to explain the invention without limiting it.

[0019] It should be understood that in the explanation of the invention, the direction or positioning designated by the terms "above", "below", "in front", "behind", "left", "right", etc., is used for the positional description in relation to the direction or positioning shown in the respective figure, solely to describe the invention and, where necessary, to simplify the description. These terms neither implicitly nor explicitly refer to the positioning, design, and operation of the device or element in question in a predetermined position, and therefore do not constitute a limitation of the application.

[0020] The terms “first”, “second”, etc. in the description of the invention serve only to distinguish individual technical features, without indicating or suggesting the relative importance, number or order of the technical features concerned.

[0021] Unless otherwise stated, the terms “provide”, “incorporate”, “connect” in the description of the invention should be understood in a broad sense, and a person skilled in the art can appropriately determine the specific meaning of the terms in the invention in connection with the concrete content of the technical solution.

[0022] As in Fig. 1, Fig. 2 and Fig. As shown in Figure 5, the shearing mechanism according to an embodiment of the invention comprises a mounting frame 900, a first shearing assembly 100, a second shearing assembly 200, and a coupling mechanism. The first shearing assembly 100 comprises a first actuating arm 110 rotatably mounted on the mounting frame 900 and a first shearing section 120 rotatably mounted on the mounting frame 900. A first driving tooth 111 is provided on the first actuating arm 110, and a first driven tooth 121, which engages with the first driving tooth 111, is provided on the first shearing section 120. The second shearing assembly 200 comprises a second actuating arm 210 rotatably mounted on the mounting frame 900 and a second shearing section 220 rotatably mounted on the mounting frame 900.A second driving tooth 211 is provided on the second actuating arm 210, and a second driven tooth 221, which engages with the second driving tooth 211, is provided on the second shearing section 220. The coupling mechanism is arranged between the first actuating arm 110 and the second actuating arm 210 to enable the first actuating arm 110 and the second actuating arm 210 to rotate synchronously in opposite directions relative to the mounting frame 900. Alternatively, the coupling mechanism is arranged between the first shearing section 120 and the second shearing section 220 to enable the first shearing section 120 and the second shearing section 220 to rotate synchronously in opposite directions relative to the mounting frame 900.

[0023] The force-transmitting device, using gearing, allows for different tooth ratios to be set as needed, either to save force or to control the opening size. This results in a simple, compact, and efficient structure; it is inexpensive to manufacture and can be installed in a smaller space.

[0024] The coupling mechanism further enables the relative coupling between the first shearing arrangement 100 and the second shearing arrangement 200, which facilitates the control of the shearing by the shearing mechanism.

[0025] In particular, the provision of the coupling mechanism can reduce problems such as misorientation of the shears and cumbersome control during shearing with the shearing mechanism, which promotes the application of the shearing mechanism, in which the power transmission takes place through toothing, in practical shearing tools such as garden shears, rose shears, branch shears and the like.

[0026] It is particularly from Fig. 3 and Fig. Figure 4 shows that the first actuating arm 110 and the first shearing section 120 are located on the same side, and the second shearing section 220 and the second actuating arm 210 are also located on the same side. When the first actuating arm 110 and the second actuating arm 210 are opened relative to each other, the first actuating arm 110 rotates clockwise and the second actuating arm 210 counterclockwise. Driven by the gearing, the first shearing section 120 rotates counterclockwise and the second shearing section 220 rotates clockwise to achieve the shearing action.

[0027] In some embodiments of the invention, the coupling mechanism comprises a sliding element arranged slidably on the mounting frame 900, and the first shear section 120 and the second shear section 220 are each provided with a sliding structure slidably fitted to the sliding element in order to enable the coupling between the first shear section 120 and the second shear section 220.

[0028] In particular, the mounting frame 900 limits the sliding of the sliding element. Since the sliding element acts on both the first shear section 120 and the mounting frame 900 during the movement of the first shear section 120, the first shear section 120 is rotated relative to the mounting frame 900 by the coupling mechanism. Likewise, the second shear section 220 is rotated relative to the mounting frame 900 by the coupling mechanism to establish the coupling between the first shear section 120 and the second shear section 220.

[0029] It is conceivable that the coupling mechanism could also be arranged between the first actuating arm 110 and the second actuating arm 210. For example, gears arranged on the first actuating arm 110 and the second actuating arm 210 and meshing with each other could also achieve the relative coupling of the shear sections.

[0030] As in Fig. 2, Fig. 3 and Fig. As can be seen in Figure 4, in some embodiments of the invention the sliding element is a sliding pin 910. The mounting frame 900 is provided with a guide sliding groove 901 that slidably fits the sliding pin 910, and the first shear section 120 and the second shear section 220 are each provided with a coupling sliding groove 101 that slidably fits the sliding pin 910 in order to enable the fitting and thus the coupling of the sliding pin 910 to the mounting frame 900, the first shear section 120 and the second shear section 220.

[0031] In particular, the coupling sliding groove 101 of the first shear section 120 and the coupling sliding groove 101 of the second shear section 220 are arranged symmetrically and intersectingly to enable the function of reverse coupling.

[0032] Of course, in practical implementation, the sliding element can also be designed as a sliding block arranged on the mounting frame 900. For example, the mounting frame 900 is plate-shaped, and two interconnected sliding blocks are each arranged by means of a sliding rail on an upper and a lower surface of the mounting frame 900. The two interconnected sliding blocks are slidably coupled to the first shear section 120 and the second shear section 220, respectively. The coupling function can thus also be realized.

[0033] As in Fig. As shown in Figure 2, in some embodiments of the invention, the mounting frame 900 comprises an upper mounting plate 960 and a lower mounting plate 920. One end of the upper mounting plate 960 is connected to one end of the lower mounting plate 920 by a first connecting bolt 930, and the other end of the upper mounting plate 960 is connected to the other end of the lower mounting plate 920 by a second connecting bolt 940. The first actuating arm 110 and the second actuating arm 210 are arranged between the upper mounting plate 960 and the lower mounting plate 920 and are rotatably fitted to the first connecting bolt 930. The first shear section 120 and the second shear section 220 are arranged between the upper mounting plate 960 and the lower mounting plate 920 and are rotatably fitted to the second connecting bolt 940.

[0034] Due to the design described above, the first actuating arm 110 and the second actuating arm 210 share a common axis of rotation, and the first shearing section 120 and the second shearing section 220 also share a common axis of rotation, so that they form a rotatable connection arrangement together with the mounting frame 900. This results in a simple and appropriate structure.

[0035] It is conceivable that the mounting frame 900 could also be a single plate or a one-piece frame, which can meet the mounting requirements.

[0036] It is conceivable that in some embodiments of the invention, the first actuating arm 110 and the second actuating arm 210 may be connected with different axes of rotation. Likewise, the first shearing section 120 and the second shearing section 220 may be connected with different axes of rotation without impairing the function of the shearing mechanism.

[0037] As in Fig. As shown in Figure 2, in some embodiments of the invention, a guide sliding groove 901 is provided in both the upper mounting plate 960 and the lower mounting plate 920. Both ends of the sliding pin 910 are designed as guide heads 911, and a central part of the sliding pin 910 is designed as a coupling section 912. The diameter of the guide heads 911 is larger than the diameter of the coupling section 912. The sliding pin 910 is arranged between the upper mounting plate 960 and the lower mounting plate 920. The two guide heads 911 are each slidably fitted to the guide sliding grooves 901 in the upper mounting plate 960 and the lower mounting plate 920. The coupling section 912 penetrates the coupling sliding grooves 101 in the first shear section 120 and the second shear section 220 and is slidably fitted to the coupling sliding grooves 101.Due to the structure of the sliding pin 910 with its smaller ends and larger central section, the sliding pin 910 can be positioned directly in a sliding mounting position when assembling the mounting frame 900. Furthermore, it can be rotatably fitted to the first shear section 120 and the second shear section 220, resulting in a simple and efficient structure and cost-effective assembly.

[0038] It is conceivable that in some embodiments of the invention, the sliding pin 910 may also be provided as an elongated cylinder with a constant diameter, the ends of which are provided with limiting screws. Furthermore, the sliding pin 910 may be mounted on the upper mounting plate 960, the first shear section 120, the second shear section 220, and the lower mounting plate 920 and secured by limiting screws.

[0039] As in Fig. As shown in Figure 2, in some embodiments the first connecting bolt 930 sequentially penetrates the upper mounting plate 960, the first actuating arm 110, the second actuating arm 210 and the lower mounting plate 920 and is then connected with a screw nut 950 to assemble the mechanisms on the first connecting bolt 930.

[0040] As in Fig. As shown in Figure 2, in some embodiments the second connecting bolt 940 sequentially penetrates the upper mounting plate 960, the first shear section 120, the second shear section 220 and the lower mounting plate 920 and is then connected with a screw nut 950 to complete the assembly of the mechanisms on the second connecting bolt 940.

[0041] It is conceivable that the first connecting bolt 930 or the second connecting bolt 940 can also create a fixed connection with the mounting frame 900 by riveting, welding, etc.

[0042] The garden shears according to an embodiment in a second aspect of the invention comprise a shearing mechanism according to an embodiment in the first aspect of the invention and two handles, each connected to the first actuating arm 110 and the second actuating arm 210. They can meet the requirements for shearing in a garden and have a simple and suitable structure.

[0043] The inventive step of the invention is, of course, not limited to these embodiments. A person skilled in the art can make equivalent modifications or substitutions without deviating from the purpose of the invention. These equivalent modifications or substitutions are intended to be included within the scope of protection defined by the claims. Reference symbol list 100 first shear arrangement, 101 Coupling sliding groove, 110 first actuating arm 111 first driving gear 120 first shear section 121 first driven gear 200 second shear arrangement 210 second actuating arm 211 second driving gear 220 second shear section 221 second driven gear 900 mounting frames 901 Guide groove 910 sliding pin 911 Guide head 912 Coupling section 960 upper mounting plate 920 lower mounting plate 930 first connecting bolt 940 second connecting bolt 950 screw nut

Claims

[1] Shearing mechanism, wherein the shearing mechanism comprises: a mounting frame (900); a first shearing arrangement (100), wherein the first shearing arrangement (100) comprises a first actuating arm (110) rotatably arranged on the mounting frame (900) and a first shearing section (120) rotatably arranged on the mounting frame (900), wherein a first driving toothing (111) is provided on the first actuating arm (110), and wherein a first driven toothing (121) in engagement with the first driving toothing (111) is provided on the first shearing section (120); a second shearing arrangement (200), wherein the second shearing arrangement (200) comprises a second actuating arm (210) rotatably arranged on the mounting frame (900) and a second shearing section (220) rotatably arranged on the mounting frame (900), wherein a second driving toothing (211) is provided on the second actuating arm (210), and wherein a second driven toothing (221) in engagement with the second driving toothing (211) is provided on the second shearing section (220); and a coupling mechanism, wherein the coupling mechanism is arranged between the first actuating arm (110) and the second actuating arm (210) in order to be able to set the first actuating arm (110) and the second actuating arm (210) in synchronous rotation in opposite directions with respect to the mounting frame (900), or wherein the coupling mechanism is arranged between the first shearing section (120) and the second shearing section (220) in order to be able to set the first shearing section (120) and the second shearing section (220) in synchronous rotation in opposite directions with respect to the mounting frame (900), and wherein the coupling mechanism comprises a sliding element arranged slidably on the mounting frame (900), and that the first shearing section (120) and the second shearing section (220) are each provided with a sliding structure slidably fitted to the sliding element, characterized by , that the sliding element is a sliding pin (910), wherein the mounting frame (900) is provided with a guide sliding groove (901) slidably fitted to the sliding pin (910), and wherein the first shearing section (120) and the second shearing section (220) are each provided with a coupling sliding groove (101) slidably fitted to the sliding pin (910). [2] Shearing mechanism according to claim 1, characterized byin that the mounting frame (900) comprises an upper mounting plate (960) and a lower mounting plate (920), wherein one end of the upper mounting plate (960) is connected to one end of the lower mounting plate (920) by a first connecting bolt (930) and the other end of the upper mounting plate (960) is connected to the other end of the lower mounting plate (920) by a second connecting bolt (940), wherein the first actuating arm (110) and the second actuating arm (210) are arranged between the upper mounting plate (960) and the lower mounting plate (920) and are rotatably fitted to the first connecting bolt (930), and wherein the first shearing section (120) and the second shearing section (220) are arranged between the upper mounting plate (960) and the lower mounting plate (920) and are rotatably fitted to the second connecting bolt (940). [3] Shearing mechanism according to claim 2, characterized bythat both the upper mounting plate (960) and the lower mounting plate (920) are provided with the guide sliding groove (901), wherein both ends of the sliding pin (910) are designed as guide heads (911) and a central part of the sliding pin (910) is designed as a coupling section (912), wherein the diameter of the guide heads (911) is larger than the diameter of the coupling section (912), wherein the sliding pin (910) is arranged between the upper mounting plate (960) and the lower mounting plate (920), wherein the two guide heads (911) are each slidably fitted to the guide sliding grooves (901) in the upper mounting plate (960) and the lower mounting plate (920), and wherein the coupling section (912) comprises the coupling sliding grooves (101) in the first shearing section (120) and the second shearing portion (220) and is slidably fitted to the coupling sliding grooves (101). [4] Shearing mechanism according to claim 2, characterized bythat the first connecting bolt (930) sequentially penetrates the upper mounting plate (960), the first actuating arm (110), the second actuating arm (210) and the lower mounting plate (920) and is then connected with a screw nut (950). [5] Shearing mechanism according to claim 2, characterized by that the second connecting bolt (940) sequentially penetrates the upper mounting plate (960), the first shearing section (120), the second shearing section (220) and the lower mounting plate (920) and is then connected with a screw nut (950). [6] Garden shears, characterized by that it comprises a shearing mechanism according to one of claims 1 to 5.

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