Hedge trimmer

Abstract

The invention provides a hedge trimmer, which comprises a trimmer body, a blade assembly, a driving assembly, a driving assembly and a driving assembly, and is characterized in that the blade assembly is arranged on the lower side of the trimmer body; the motor assembly is arranged in the machine body and used for providing power; the transmission assembly is arranged between the motor assembly and the blade assembly and used for converting rotation of the output end of the motor assembly into translation of the blade assembly, so that the blade assembly completes cutting; the piston assembly is arranged at the side end of the motor assembly and used for generating and blowing out compressed gas; and a knife grinding assembly and a knife moving assembly are further arranged, the knife moving assembly is used for separating the cutting blade from the matched blade, and the knife grinding assembly is used for grinding the cutting blade, so that the time for disassembling the blade is saved, and the cost for replacing the blade is reduced.

Description

Technical Field

[0001] The present invention relates to gardening tools, in particular to a hedge trimmer. Background Art

[0002] At present, a Chinese patent with announcement number CN217564225U discloses a hedge trimmer, including a body, a blade and a blade holder, the blade is fixed under the blade holder, one end of the blade and the blade holder is fixed to the body, the blade holder is also provided with a refueling assembly, the body is provided with an oil storage pot, and the handle of the body is provided with an oil pump switch. The hedge trimmer is more convenient for filling lubricating oil on the blade, and also improves work efficiency.

[0003] The above patent still has shortcomings. Hedge trimmers are usually used for greening projects such as trimming hedges and lawn edges. When in use, the sharpness of the hedge trimmer's blades determines the trimming efficiency and trimming effect. When the hedge trimmer's blades are too blunt, the blades need to be disassembled for grinding or replacement. On-site disassembly and grinding are rather troublesome, and replacing the blades is too costly. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a hedge trimmer having an automatic grinding function.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a hedge trimmer, comprising a body: A blade assembly, which is arranged on the lower side of the machine body and is used for cutting green plants; A motor assembly, which is arranged in the fuselage and is used to provide power; A transmission assembly, which is disposed between the motor assembly and the blade assembly, and is used to convert the rotation of the output end of the motor assembly into the translation of the blade assembly, so that the blade assembly completes the cutting; A piston assembly, which is arranged at the side end of the motor assembly and is used to generate and blow out compressed gas; Among them, the blade assembly includes an upper mounting frame, a lower mounting frame, a cutting blade and a mating blade, the mating blade and the cutting blade are respectively mounted on the upper mounting frame and the lower mounting frame, and a sharpening assembly and a knife moving assembly are also arranged between the cutting blades. The knife moving assembly is used to separate the cutting blade from the mating blade, and the sharpening assembly is used to grind the cutting blade.

[0006] Through the above-mentioned technical means, by setting a transmission assembly between the motor assembly and the blade assembly, the rotational force is converted into linear reciprocating motion, so that the cutting blade and the mating blade are made to perform reciprocating linear motion to complete the cutting, and by setting a sharpening assembly and a knife moving assembly between the cutting blade and the mating blade, when the cutting blade needs to be sharpened, the cutting blade is separated from the mating blade by the moving assembly, and the sharpening assembly is moved to the cutting blade, and then the sharpening step is completed by the reciprocating linear motion of the cutting blade, so that the grinding of the blade is more convenient, the time generated by disassembling the blade is saved, and the cost of replacing the blade is reduced.

[0007] Preferably, a plurality of positioning columns 1 and 2 are respectively provided on the upper mounting frame and the lower mounting frame, and long waist holes are provided on the mating blade and the cutting blade. The mating blade cooperates with the positioning column 1 and is slidably arranged at the lower end of the upper mounting frame, and the cutting blade cooperates with the positioning column 2 and is slidably arranged at the upper end of the lower mounting frame. Blades are provided at both ends of the cutting blade, and inclined pressure plates are provided at both ends of the mating blade. The inclined pressure plates are in contact with the blade and cooperate with the blade for cutting, and positioning frames are also provided at the front ends of the upper mounting frame and the lower mounting frame.

[0008] Through the above technical means, through the cooperation between the positioning column 1 and the positioning column 2 and the long waist hole, the position of the matching blade and the cutting blade is limited, the degree of freedom thereof is reduced, and the inclined pressure plate is pressed on the blade to provide space for the sharpening assembly.

[0009] Preferably, the sharpening assembly comprises a sharpening frame 1, a sharpening frame 2 and a power piece, the side ends of the sharpening frame 1 and the sharpening frame 2 are provided with a bevel 1, the bevel 1 is adapted to the inner bevel of the inclined pressure plate, the bottoms of the sharpening frame 1 and the sharpening frame 2 are both provided with grinding discs, and the power piece drives the sharpening frame 1 and the sharpening frame 2 to move toward the cutting edges at both ends of the cutting blade.

[0010] Through the above technical means, the power parts are used to drive the knife sharpening frame 1 and the knife sharpening frame 2 to move out, and the grinding disc is set to achieve the grinding of the tool. The inclined surface 1 is adapted to the inner side of the inclined pressure plate to assist in separating the matching blade and the cutting blade when the knife sharpening frame 1 and the knife sharpening frame 2 are moved out.

[0011] Preferably, the knife sharpening frame 1 is provided with a sliding plate 1 and a sliding plate 2, and the sliding plate 1 and the sliding plate 2 are both provided with a slider 1 and a slide groove 1, the knife sharpening frame 2 is provided with a sliding plate 3 and a sliding plate 4, and the sliding plate 3 and the sliding plate 4 are both provided with a slider 2 and a slide groove 2, the slider 1 slides in cooperation with the slide groove 2, the slider 2 slides in cooperation with the slide groove 1, and a cavity is formed between the sliding plate 1 and the sliding plate 3, and the power component includes a pipeline 1 and a pipeline switch arranged at the output end of the piston assembly, and the pipeline 1 is connected to the cavity.

[0012] Through the above technical means, through the cooperation of slider 1 and slide groove 2, and the cooperation of slider 2 and slide groove 1, the movement accuracy between the knife sharpening frame 1 and the knife sharpening frame 2 is increased, a cavity is formed between the sliding plate 1 and the sliding plate 2, and gas is compressed into the cavity through the pipeline 1, so that the movement of the knife sharpening frame 1 and the knife sharpening frame 2 is achieved pneumatically.

[0013] Preferably, racks are provided on the sliding plate one and the sliding plate three, and a gear is also provided in the cavity, the gear is respectively meshed with the racks on the sliding plate one and the sliding plate three, and the gear is rotatably arranged on the side end surface of the sharpening frame one.

[0014] Through the above technical means, through the cooperation of the rack and the gear, the sharpening frame 1 and the sharpening frame 2 are moved outward at equal distances, thereby preventing the sharpening frame 1 or the sharpening frame 2 from moving out of place due to external force, causing the sharpening frame 1 or the sharpening frame 2 to move out of place and causing the grinding effect to deteriorate. At the same time, it is ensured that the sharpening frame 1 and the sharpening frame 2 return to the center position when moving back, thereby preventing the problem that the cutting blade and the mating blade cannot be merged into place.

[0015] Preferably, the knife moving assembly includes a base block, a sealing plate and a push cylinder, the push cylinder is fixedly arranged in the base block, the sealing plate is arranged between the base block and the knife sharpening assembly, and an air duct is also arranged in the base block, and the air duct is connected to the pipeline and the cavity.

[0016] Through the above technical means, the cutting blade and the matching blade are separated by controlling the push cylinder through gas, thereby completing the separation while pushing the first sharpening frame and the second sharpening frame to move outward.

[0017] Preferably, the output end of the piston assembly is also provided with pipeline 2, the pipeline 1 is arranged at the side end of pipeline 2 and is connected with pipeline 2, the input end of the piston assembly is provided with pipeline 3 and pipeline 4, the pipeline 4 is connected with the cavity, pipeline switches are provided in pipeline 2 and pipeline 3, the pipeline switch includes a one-way pressure valve, a spiral base and a limit rod, the one-way pressure valve is arranged in the spiral base, the spiral base and pipeline 2 and pipeline 3 are all threadedly matched, the end of the spiral base is also rotatably provided with a limit frame, a limit waist groove is provided on the limit frame, the limit rod is fixedly connected to pipeline 2 and pipeline 3 and passes through the limit waist groove on the internal limit frame.

[0018] Through the above-mentioned technical means, by setting up pipeline two, the compressed air generated in the piston assembly is discharged, and the cut waste branches and leaves can be blown out when the hedge trimmer is working. By setting up a spiral base, when it is necessary to sharpen the knife, pipeline two is connected with pipeline one to allow gas to enter the cavity. When the hedge trimmer is working normally, pipeline two can be blocked by the spiral base. When the knife sharpening is completed, pipeline three and pipeline four are connected to each other to extract the gas from the cavity. By setting up a one-way pressure valve, a protection mechanism can be realized when the pressure in the cavity is too high or too low, so that the gas passes through the one-way pressure valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 It is a partial schematic diagram of an embodiment; Figure 3 A partial cross-sectional view of an embodiment; Figure 4 is a schematic diagram of the structure of the piston assembly; Figure 5 It is a structural schematic diagram of the pipeline switch; Figure 6 is a cross-sectional schematic diagram of the knife sharpening assembly when it is retracted; Figure 7 is a cross-sectional schematic diagram of the knife sharpening assembly in the knife sharpening state; Figure 8 is a cross-sectional schematic diagram of a knife sharpening assembly; Fig. 9 It is a schematic diagram of the structure of the knife sharpening assembly and the knife moving assembly; Fig.10 This is a schematic diagram of the structure of pipeline 2.

[0020] Figure numerals: 1, fuselage; 2, motor assembly; 21, gear one; 3, transmission assembly; 31, gear two; 32, swing rod two; 33, eccentric wheel; 4, piston assembly; 41, piston sleeve; 42, piston rod; 43, pipeline two; 44, pipeline three; 45, pipeline four; 46, pipeline switch; 47, one-way pressure valve; 48, spiral base; 49, limit rod; 410, limit frame; 411, limit waist groove; 412, piston body; 5, blade assembly; 51, upper mounting frame; 52, lower mounting frame; 53, cutting blade; 531, blade; 54, matching blade; 55, positioning column one; 56, Positioning column two; 57, long waist hole; 58, inclined pressure plate; 59, positioning frame; 510, hand wheel; 6, grinding assembly; 61, grinding frame one; 62, grinding frame two; 63, power part; 64, inclined support plate; 65, grinding disc; 66, sliding plate one; 67, sliding plate two; 68, slider one; 69, slide groove one; 610, sliding plate three; 611, sliding plate four; 612, slider two; 613, slide groove two; 614, cavity; 615, side plate; 616, pipeline one; 618, rack; 619, gear three; 7, tool moving assembly; 71, base block; 72, sealing plate; 73, push cylinder; 74, airway. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0022] A hedge trimmer comprises a body 1: A blade assembly 5, which is arranged on the lower side of the body 1 and is used for cutting green plants; The motor assembly 2 is arranged in the fuselage 1 and is used to provide power. The motor assembly 2 includes a motor, a battery, and a circuit board. A gear 21 is arranged at the output end of the motor. The transmission assembly 3 is arranged between the motor assembly 2 and the blade assembly 5, and is used to convert the rotation of the output end of the motor assembly 2 into the translation of the blade assembly 5, so that the blade assembly 5 completes the cutting. The transmission assembly 3 includes a second gear 31 and a second swing rod 32. A lower eccentric wheel 33 is arranged at the lower end of the second gear 31. The second swing rod 32 is sleeved on the lower eccentric wheel 33 and can slide on the lower eccentric wheel 33. The piston assembly 4 is arranged at the side end of the motor assembly 2, and is used to generate compressed gas and blow it out. It includes a piston sleeve 41, a piston body 412 and a piston rod 42. The piston body 412 is arranged on the top of the piston rod 42, and a one-way valve is arranged inside it. A rocker rod three is arranged at the piston rod 42. The rocker rod three is connected to the output end of the motor through an eccentric wheel 33. When the motor rotates, it drives the piston rod 42 to perform linear reciprocating motion. The connection between the piston assembly 4 and the transmission assembly 3 is different. The output end of the motor can be controlled by the circuit board to engage with one of the transmission assembly 3 and the piston assembly 4 alone or together.

[0023] Among them, the blade assembly 5 includes an upper mounting frame 51, a lower mounting frame 52, a cutting blade 53 and a matching blade 54. The matching blade 54 and the cutting blade 53 are respectively mounted on the upper mounting frame 51 and the lower mounting frame 52. The cutting blade 53 is hinged to the rocker arm 2 32. A sharpening assembly 6 and a knife moving assembly 7 are also arranged between the cutting blades 53. The knife moving assembly 7 is used to separate the cutting blade 53 from the matching blade 54. The sharpening assembly 6 is used to grind the cutting blade 53. When the cutting blade 53 needs to be polished, the cutting blade 53 is separated from the matching blade 54 by the moving assembly, and the sharpening assembly 6 is moved to the cutting blade 53. The polishing step is then completed by the reciprocating linear motion of the cutting blade 53, which makes the polishing of the blade more convenient, saves the time generated by disassembling the blade, and reduces the cost of replacing the blade.

[0024] The upper mounting frame 51 and the lower mounting frame 52 are respectively provided with a plurality of positioning posts 1 55 and positioning posts 2 56. The matching blade 54 and the cutting blade 53 are both provided with long waist holes 57. The matching blade 54 cooperates with the positioning posts 1 55 and is slidably arranged at the lower end of the upper mounting frame 51. The cutting blade 53 cooperates with the positioning posts 2 56 and is slidably arranged at the upper end of the lower mounting frame 52. Both ends of the cutting blade 53 are provided with blades. Both ends of the matching blade 54 are provided with inclined pressure plates 58. The inclined pressure plates 58 are in contact with the blades and cooperate with the blades for cutting. The front end and rear end of the upper mounting frame 51 and the lower mounting frame 52 are provided with a plurality of positioning posts 1 55 and 56. A positioning frame 59 is also provided at the end, and a hand wheel 510 is provided at the bottom of the positioning frame 59. The hand wheel 510 and the positioning frame 59 are fixed by threads. By rotating the hand wheel 510, the lower mounting frame 52 can be pressed against by the screw at the tail of the hand wheel 510 to move upward. The positioning frame 59 is fixed on the upper mounting frame 51, and the lower mounting frame 52 is slidably set on the positioning frame 59. Through the cooperation between the positioning column 1 55 and the positioning column 2 56 and the long waist hole 57, the positions of the mating blade 54 and the cutting blade 53 are limited, and their left and right freedoms are limited. The inclined pressure plate 58 is pressed on the blade to provide space for the sharpening assembly 6.

[0025] The sharpening assembly 6 includes a sharpening frame 61, a sharpening frame 62 and a power piece 63. An inclined support plate 64 is arranged at the side ends of the sharpening frame 61 and the sharpening frame 62. The inclined support plate 64 forms an inclined surface 1, and the inclined surface 1 is adapted to the inner inclined surface of the inclined pressure plate 58. A grinding disc 65 is arranged at the bottom of the sharpening frame 61 and the sharpening frame 62. The power piece 63 drives the sharpening frame 61 and the sharpening frame 62 to move toward the blades at both ends. At this time, the inclined surface 1 is against the inner side of the inclined pressure plate 58. When continuing to move outward, the auxiliary knife moving assembly 7 controls the mating blade 54 to separate from the cutting blade 53.

[0026] The sharpening rack 1 61 is provided with a sliding plate 1 66 and a sliding plate 2 67, and the sliding plate 1 66 and the sliding plate 2 67 are both provided with a slider 1 68 and a slide groove 1 69. The sharpening rack 2 62 is provided with a sliding plate 3 610 and a sliding plate 4 611, and the sliding plate 3 610 and the sliding plate 4 611 are both provided with a slider 2 612 and a slide groove 2 613. The slider 1 68 slides with the slide groove 2 613, and the slider 2 612 slides with the slide groove 1 613. 9 cooperates with sliding, a cavity 614 is formed between the sliding plate 1 66 and the sliding plate 3 610, the knife moving assembly 7 is arranged at both ends of the knife sharpening frame 1 61 and the knife sharpening frame 2 62, and the side ends of the knife sharpening frame 1 61 and the knife sharpening frame 2 62 are both provided with side plates 615, the power member 63 includes a pipeline 1 616 and a pipeline switch 46 arranged at the output end of the piston assembly 4, the pipeline 1 616 is connected with the cavity 614, and the knife moving assembly 7 includes a base block 71, The sealing plate 72 and the push cylinder 73, the push cylinder 73 is fixedly arranged in the base block 71, the sealing plate 72 is arranged between the base block 71 and the sharpening assembly 6, and an air channel 74 is also arranged in the base block 71, the air channel 74 is connected with the pipeline 1 616 and the cavity 614, the sealing plate 72 cooperates with the side plate 615 to ensure that the cavity 614 is still in a sealed state after the sharpening frame 1 61 and the sharpening frame 2 62 move outward, through the cooperation of the slider 1 68 and the slide groove 2 613, and the cooperation of the slider 2 612 and the slide groove 1 69, the movement accuracy between the sharpening frame 1 61 and the sharpening frame 2 62 is increased, and at the same time, it is ensured that the sharpening frame 1 61 and the sharpening frame 2 62 will not separate, and the cavity 614 is formed between the sliding plate 1 66 and the sliding plate 2 67, and the gas is compressed into the cavity 614 through the pipeline 1 616, so that the movement of the sharpening frame 1 61 and the sharpening frame 2 62 is realized by pneumatic means.

[0027] Racks 618 are provided on both the sliding plate 1 66 and the sliding plate 3 610, and a gear 619 is also provided in the cavity 614. The gear 619 meshes with the racks 618 on the sliding plate 1 66 and the sliding plate 3 610 respectively. The gear 619 is rotatably set on the side end surface of the sharpening frame 1 61. Through the cooperation of the rack 618 and the gear 619, the sharpening frame 1 61 and the sharpening frame 2 62 are moved outward at equal distances to prevent the sharpening frame 1 61 or the sharpening frame 2 62 from moving out of place due to external force, causing the sharpening frame 1 61 or the sharpening frame 2 62 to move out of place and cause the grinding effect to deteriorate. At the same time, it is ensured that the sharpening frame 1 61 and the sharpening frame 2 62 return to the center position when moving back to prevent the cutting blade 53 and the mating blade 54 from being unable to merge into place.

[0028] The output end of the piston assembly 4 is also provided with a second pipeline 43, and the first pipeline 616 is arranged at the side end of the second pipeline 43 and communicated with the second pipeline 43. The input end of the piston assembly 4 is provided with a third pipeline 44 and a fourth pipeline 45, and the fourth pipeline 45 is communicated with the cavity 614. The second pipeline 43 and the third pipeline 44 are both provided with a pipeline switch 46. The pipeline switch 46 includes a one-way pressure valve 47, a spiral base 48 and a limit rod 49. The one-way pressure valve 47 is arranged in the spiral base 48. The spiral base 48 and the second pipeline 43 and the third pipeline 44 are all threadedly matched. The end of the spiral base 48 is also rotatably provided with a limit frame 410, and the limit frame 410 is provided with a limit waist groove 411. The limit rod 49 and the second pipeline 43 and the third pipeline 44 are all fixedly connected and pass through the limit waist groove 411 on the internal limit frame 410. By setting the second pipeline 43, The compressed air generated in the piston assembly 4 is discharged, and the cut waste branches and leaves can be blown out when the hedge trimmer is working. By setting the spiral base 48, when sharpening is required, the pipeline 2 43 is connected with the pipeline 1 616 to allow the gas to enter the cavity 614. When the hedge trimmer is working normally, the pipeline 2 43 can be blocked by the spiral base 48. When the sharpening is completed, the pipeline 3 44 is connected with the pipeline 4 45 to extract the gas from the cavity 614. The one-way pressure valve 47 is composed of a tapered hole, a spring and a steel ball. The compression force of the spring determines the overload pressure of the one-way pressure valve 47. When the pressure in the cavity 614 is too large or too small, the compression force of the spring fails to achieve pressure relief. By setting the one-way pressure valve 47, a protection mechanism can be implemented when the pressure in the cavity 614 is too high or too low, so that the gas can be relieved through the one-way pressure valve 47.

[0029] The following is the operation flow of sharpening the blade of the hedge trimmer. First, turn on the motor to start the piston assembly 4, then rotate the handle downward to move the stud at the end of the handle downward, then rotate the spiral base 48 in the pipeline 2 43 to connect the pipeline 1 616 with the pipeline 2 43. At this time, the air pressure generated by the piston assembly 4 enters the cavity 614, and the pressure in the cavity 614 gradually increases. At this time, the sharpening frame 1 61 and the sharpening frame 2 62 move to the left and right sides respectively, and at the same time, the output end of the push cylinder 73 pushes upward to separate the cutting blade 53 from the matching blade 54. After the movement is completed, the grinding disc 6 5 is at the blade, at this time, the control motor drives the transmission component 3 to drive the cutting blade 53 to perform linear reciprocating motion to complete the sharpening. When the sharpening is completed, the spiral base 48 in the pipeline 2 43 is screwed in to cut off the pipeline 1 616 from the pipeline 2 43, and then the spiral base 48 in the pipeline 3 44 is screwed out to connect the pipeline 3 44 with the pipeline 4 45. At this time, the piston assembly 4 draws out the gas in the cavity 614 during movement, thereby realizing the retraction of the sharpening frame 1 61 and the sharpening frame 2 62. After completion, the spiral base 48 in the pipeline 3 44 is screwed back, and finally the handle is screwed back.

[0030] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A hedge trimmer, characterized in that: Including body (1): A blade assembly (5), which is arranged on the lower side of the body (1) and is used for cutting green plants; A motor assembly (2), which is arranged in the fuselage (1) and is used to provide power; A transmission assembly (3) is arranged between the motor assembly (2) and the blade assembly (5) and is used to convert the rotation of the output end of the motor assembly (2) into the translation of the blade assembly (5), so that the blade assembly (5) completes cutting; A piston assembly (4) is arranged at the side end of the motor assembly (2) and is used to generate compressed gas and blow it out; The blade assembly (5) comprises an upper mounting frame (51), a lower mounting frame (52), a cutting blade (53) and a matching blade (54); the matching blade (54) and the cutting blade (53) are respectively mounted on the upper mounting frame (51) and the lower mounting frame (52); a sharpening assembly (6) and a blade moving assembly (7) are further arranged between the cutting blades (53); the blade moving assembly (7) is used to separate the cutting blade (53) from the matching blade (54); and the sharpening assembly (6) is used to grind the cutting blade (53).

2. A hedge trimmer according to claim 1, characterized in that: A plurality of positioning columns (55) and positioning columns (56) are respectively arranged on the upper mounting frame (51) and the lower mounting frame (52); a long waist hole (57) is provided on the matching blade (54) and the cutting blade (53); the matching blade (54) cooperates with the positioning column (55) and is slidably arranged at the lower end of the upper mounting frame (51); the cutting blade (53) cooperates with the positioning column (56) and is slidably arranged at the upper end of the lower mounting frame (52); both ends of the cutting blade (53) are provided with blades; both ends of the matching blade (54) are provided with inclined pressure plates (58); the inclined pressure plates (58) are in contact with the blades and cooperate with the blades to perform cutting; the front ends of the upper mounting frame (51) and the lower mounting frame (52) are also provided with positioning frames (59).

3. A hedge trimmer according to claim 2, characterized in that: The knife sharpening assembly (6) comprises a knife sharpening frame (61), a knife sharpening frame (62) and a power member (63). The side ends of the knife sharpening frame (61) and the knife sharpening frame (62) are provided with a bevel (61), and the bevel (61) is adapted to the inner bevel of the inclined pressure plate (58). The bottoms of the knife sharpening frame (61) and the knife sharpening frame (62) are both provided with a grinding disc (65). The power member (63) drives the knife sharpening frame (61) and the knife sharpening frame (62) to move toward the blades at both ends of the cutting blade (53).

4. A hedge trimmer according to claim 3, characterized in that: The first grinding rack (61) is provided with a sliding plate (66) and a second sliding plate (67), and the first sliding plate (66) and the second sliding plate (67) are both provided with a slider (68) and a slide groove (69). The second grinding rack (62) is provided with a sliding plate (610) and a sliding plate (611), and the third sliding plate (610) and the fourth sliding plate (611) are both provided with a slider (612) and a slide groove (612). 3), the slider 1 (68) slides in cooperation with the slide groove 2 (613), the slider 2 (612) slides in cooperation with the slide groove 1 (69), a cavity (614) is formed between the slide plate 1 (66) and the slide plate 3 (610), the power member (63) includes a pipeline 1 (616) and a pipeline switch (46) arranged at the output end of the piston assembly (4), and the pipeline 1 (616) is connected to the cavity (614).

5. A hedge trimmer according to claim 4, characterized in that: The sliding plate 1 (66) and the sliding plate 3 (610) are both provided with a rack (618), and a gear (619) is also provided in the cavity (614). The gear (619) is respectively meshed with the racks (618) on the sliding plate 1 (66) and the sliding plate 3 (610), and the gear (619) is rotatably provided on the side end surface of the sharpening frame 1 (61).

6. A hedge trimmer according to claim 4, characterized in that: The knife moving assembly (7) comprises a base block (71), a sealing plate (72) and a push cylinder (73); the push cylinder (73) is fixedly arranged in the base block (71); the sealing plate (72) is arranged between the base block (71) and the knife sharpening assembly (6); an air passage (74) is also arranged in the base block (71); the air passage (74) is connected to a pipeline (616) and a cavity (614).

7. A hedge trimmer according to claim 4, characterized in that: The output end of the piston assembly (4) is also provided with a second pipeline (43), the first pipeline (616) is provided at the side end of the second pipeline (43) and is in communication with the second pipeline (43), the input end of the piston assembly (4) is provided with a third pipeline (44) and a fourth pipeline (45), the fourth pipeline (45) is in communication with the cavity (614), and pipeline switches (46) are provided in both the second pipeline (43) and the third pipeline (44), the pipeline switch (46) comprising a one-way pressure valve (47), a spiral base (48) and a limit valve (49). The one-way pressure valve (47) is arranged in a spiral base (48), and the spiral base (48) is threadedly matched with the second pipeline (43) and the third pipeline (44). A limit frame (410) is rotatably arranged at the end of the spiral base (48), and a limit waist groove (411) is provided on the limit frame (410). The limit rod (49) is fixedly connected with the second pipeline (43) and the third pipeline (44) and passes through the limit waist groove (411) on the internal limit frame (410).

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