Multi-size trimming assembly for hedge trimmer

Abstract

The present invention relates to a multi-size pruning assembly for a hedge trimmer, belonging to the technical field of hedge trimming. It includes a size adjustment unit, a pruning unit, and a pre-tightening support unit. The size adjustment unit is composed of a longitudinal adjustment component and a lateral adjustment component. Through the longitudinal sliding of the adjustment plate and the articulated connection of the connecting rod, flexible adjustment of different sizes can be achieved. The pruning unit uses a transmission sprocket and a cutting chain, in cooperation with a driving mechanism, to complete the pruning work. The pre-tightening support unit ensures the stability and tension of the cutting chain during the pruning process through a support sprocket, a pre-tightening sprocket, and a translation component. The multi-size pruning assembly of the hedge trimmer of the present invention has the advantages of overall adjustment, high safety, and adaptability to pruning of various sizes. By flexibly adjusting the components in the size adjustment unit, the pruning requirements of hedges of different heights and widths can be met.

Description

Technical Field

[0001] The present invention relates to a multi-size pruning assembly for a hedge trimmer, belonging to the technical field of hedge trimming. Background Art

[0002] In the work of environmental sanitation and greening, it is crucial to maintain the beauty and neatness of the hedges in the green belt, which requires frequent and delicate pruning of the shape of the hedges in the green belt. However, the current method of pruning the hedges in the green belt is still relatively traditional, mainly relying on manual operation: first, the staff uses a string to roughly level the hedge to ensure that the outline of the pruned hedge is uniform, and then holds scissors or relatively basic electric tools to prune one by one. This traditional method of hedge pruning is not only inefficient but also poses a certain hidden danger to the personal safety of the operators. During the pruning process, the operators need to maintain a bent or raised-arm posture for a long time, which is extremely likely to cause physical fatigue and muscle strain.

[0003] More critically, in special environments such as highways, due to the full closure of the road section and the long mileage, the difficulty and danger of the pruning work are further increased. The operators not only need to face the potential safety risks brought by the vehicles driving at high speed but also need to maintain a high degree of concentration during long-term and high-intensity labor, which undoubtedly greatly increases their physical and mental burden.

[0004] The existing Chinese invention patent with the publication number CN111226624A includes a fixed mounting plate. One end of the fixed mounting plate is hinged with a left first connecting rod, and the other end is hinged with a left door rod. The left first connecting rod is hinged with a left second connecting rod at the end far from the fixed mounting plate, and the left second connecting rod is hinged with the left door rod at the end far from the left first connecting rod; the left door rod extends in a direction perpendicular to the left door rod and the left second connecting rod at the end far from the fixed mounting plate and is provided with a cross bar; the cross section of the cross bar is non-circular, and a right door rod is slidably connected to the cross bar. A first electric push rod for driving the right door rod to slide along the cross bar is fixedly mounted on the cross bar; a left pruning assembly is provided on the left door rod, a right pruning assembly is provided on the right door rod, and a horizontal pruning assembly is provided on the horizontal bar; a power assembly is provided on the cross bar; this environmental sanitation hedge trimmer can simultaneously trim three sides of the hedge by using the mutual cooperation of three groups of pruning teeth, realizing efficient pruning.

[0005] The inventor found that there are at least the following technical problems in the prior art:

[0006] During the pruning process, the required height and width of each hedge in the green belt are different. After the above-mentioned pruning device is adjusted, the saw teeth on one side will extend outwards, posing a safety hazard. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a multi-size trimming assembly for a hedge trimmer, which can be adjusted as a whole, has better safety, and can achieve trimming of various sizes.

[0008] The multi-size trimming assembly for a hedge trimmer according to the present invention includes

[0009] a size adjustment unit, including a longitudinal adjustment component and a transverse adjustment component for connection. The longitudinal adjustment component includes a support plate, on which an adjustment plate is slidably mounted. At least three groups of longitudinal adjustment components are arranged in the transverse direction, and a transverse adjustment component is connected between the longitudinal adjustment components. The transverse adjustment component includes at least two connecting rods, which are hinged in the middle. The same ends of the two connecting rods are respectively hinged to the support plate and the adjustment plate, and the other same ends of the two connecting rods are respectively hinged to the support plate and the adjustment plate of the adjacent longitudinal adjustment component. When the adjustment plate moves longitudinally, the distance between two adjacent longitudinal adjustment components can be adjusted through the two connecting rods;

[0010] a trimming unit, including drive sprockets mounted on the longitudinal adjustment components on both sides. The drive sprockets are respectively mounted on the support plate and the adjustment plate, and a cutting chain is mounted between the drive sprockets. A drive mechanism is connected to at least one of the drive sprockets;

[0011] a pre-tightening support unit, including a support sprocket and a pre-tightening sprocket mounted on the middle longitudinal adjustment component. The support sprocket is correspondingly mounted on the adjustment plate, and a translation component for moving the pre-tightening sprocket is further mounted between the pre-tightening sprocket and the support plate.

[0012] Further, an articulated column for articulated connection is provided between the connecting rod and the support plate or the adjustment plate, and a drive sprocket or a support sprocket is respectively mounted on the articulated column.

[0013] Further, chain plates are respectively provided at both ends of the drive sprocket, the support sprocket and the pre-tightening sprocket.

[0014] Further, a transmission lead screw is correspondingly mounted on the support plate, a transmission motor is correspondingly provided on the support plate at one end of the transmission lead screw, the output end of the transmission motor is connected to one end of the transmission lead screw, and a transmission nut adapted to the transmission lead screw is provided on the adjustment plate.

[0015] Further, slide rails are respectively mounted on both sides of the support plate where the transmission lead screw is located, and sliders adapted to the slide rails are mounted on the adjustment plate.

[0016] Further, it further includes a size adjustment unit I, a trimming unit I, and a pre-tightening support unit I with the same structure that are vertically arranged with respect to the size adjustment unit, the trimming unit, and the pre-tightening support unit. A first right-angle mounting plate is installed on the support plate in the longitudinal adjustment assembly on one side, and the size adjustment unit and the size adjustment unit I are installed together through the first right-angle mounting plate.

[0017] Further, it further includes a size adjustment unit II, a trimming unit II, and a pre-tightening support unit II installed on the opposite side of the size adjustment unit I, the trimming unit I, and the pre-tightening support unit I. A second right-angle mounting plate is installed on the support plate in the longitudinal adjustment assembly on the corresponding side, and the size adjustment unit and the size adjustment unit II are installed together through the second right-angle mounting plate.

[0018] Further, the translation assembly includes a translation electric cylinder installed at one end of the support plate. A moving block is installed at the output end of the translation electric cylinder, and a pre-tightening sprocket is elastically installed on the moving block;

[0019] A guiding housing is installed on the support plate corresponding to the moving block, and the moving block is slidably installed inside the guiding housing.

[0020] Further, it further includes a chain positioning assembly installed on the support plate corresponding to the pre-tightening sprocket.

[0021] Further, the chain positioning assembly includes a positioning block installed on the support plate in the intermediate longitudinal adjustment assembly. Two positioning strips extending outward are provided at one end of the positioning block, and positioning grooves for accommodating the cutting chain are provided on the positioning strips. The two positioning strips are arranged in parallel on the outer circumference of the pre-tightening sprocket.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The size adjustment unit of the present invention allows the trimming assembly to be adjusted in the longitudinal and transverse directions to adapt to the hedgerow trimming requirements of different heights or widths. The trimming unit realizes the trimming function through the transmission sprocket and the cutting chain, while the pre-tightening support unit ensures the stability and tension of the cutting chain during the trimming process.

[0024] The present invention further includes units with the same structure (Dimension adjustment unit I, Trimming unit I, and Pre-tightening support unit I) arranged perpendicular to the dimension adjustment unit, trimming unit, and pre-tightening support unit, as well as units installed on the opposite sides (Dimension adjustment unit II, Trimming unit II, and Pre-tightening support unit II). The design of these units enables the hedge trimmer to trim three sides of the hedge simultaneously, achieving efficient trimming. Through overall adjustment, the safety is higher, and trimming of various sizes can be achieved. By adjusting the moving distance between the support plate and the adjustment plate in the dimension adjustment unit and the angle of the connecting rod in the lateral adjustment assembly, the size of the trimming assembly can be flexibly adjusted to meet the trimming requirements of hedges with different heights and widths. At the same time, since the trimming assembly is adjusted as a whole, the potential safety hazard of the saw teeth on one side extending outward during the trimming process can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-side trimming structure of Embodiment 1 of the present invention;

[0026] Figure 2 is the front view of Embodiment 1 of the present invention;

[0027] Figure 3 is the schematic diagram of the structure of Embodiment 1 of the present invention;

[0028] Figure 4 is the schematic diagram of the dimension adjustment unit structure of Embodiment 1 of the present invention;

[0029] Figure 5 is the schematic diagram of the internal structure of the chain plate of Embodiment 1 of the present invention;

[0030] Figure 6 is the schematic diagram of the internal structure of the positioning block of Embodiment 1 of the present invention;

[0031] Figure 7 is the schematic diagram of the adjusted structure of Embodiment 1 of the present invention;

[0032] Figure 8 is Figure 7 the partial enlarged view at A in

[0033] Figure 9 is the schematic diagram of the two-side trimming structure of Embodiment 1 of the present invention;

[0034] In the figure:

[0035] 1. Dimension adjustment unit; 111. Adjustment plate; 112. Slide block; 113. Slide rail; 114. Support plate; 115. Transmission lead screw; 116. Transmission motor; 11. Adjustment assembly; 12. Lateral adjustment assembly; 121. Connecting rod; 122. Hinge column; 123. Fixed plate;

[0036] 2. Pre-tightening support unit; 21. Translation component; 211. Translation electric cylinder; 212. Moving block; 213. Guide housing; 214. Pre-tightening block; 215. Pre-tightening spring; 216. Non-contact position sensor; 22. Pre-tightening sprocket; 23. Support sprocket; 24. Chain positioning component; 241. Positioning block; 242. Positioning bar; 2421. Positioning groove; 2422. Guide inclined plane;

[0037] 3. Trimming unit; 31. Driving mechanism; 311. Servo motor; 312. Gearbox; 32. Driving sprocket; 33. Cutting chain; 34. Chain plate; 341. First chain plate; 342. Second chain plate; 343. Axial bearing; 344. Radial bearing; 345. Positioning rod; 346. Arc connecting bar;

[0038] 4. Second right-angle mounting plate;

[0039] 5. First right-angle mounting plate;

[0040] A1. Dimension adjustment unit I; A2. Pre-tightening support unit I; A3. Trimming unit I;

[0041] B1. Dimension adjustment unit II; B2. Pre-tightening support unit II; B3. Trimming unit II. Detailed implementation mode

[0042] Embodiment 1

[0043] As Figures 1 to 9 shown, the multi-size trimming assembly of the hedge trimmer described in the present invention includes

[0044] The dimension adjustment unit 1 includes a longitudinal adjustment component 11 and a transverse adjustment component 12 for connection. The longitudinal adjustment component 11 includes a support plate 114, and an adjustment plate 111 is installed on the support plate 114 in a sliding fit. At least three groups of longitudinal adjustment components 11 are arranged in the transverse direction. A transverse adjustment component 12 is connected between the longitudinal adjustment components 11. The transverse adjustment component 12 includes at least two connecting rods 121. The two connecting rods 121 are hinged in the middle. The same ends of the two connecting rods 121 are respectively hinged to the support plate 114 and the adjustment plate 111. The other same ends of the two connecting rods 121 are respectively hinged to the support plate 114 and the adjustment plate 111 of the adjacent longitudinal adjustment component 11. When the adjustment plate 111 moves longitudinally, the distance between two adjacent longitudinal adjustment components 11 can be adjusted through the two connecting rods 121;

[0045] The trimming unit 3 includes drive sprockets 32 mounted on the longitudinal adjustment components 11 on both sides. The drive sprockets 32 are respectively mounted on the support plate 114 and the adjustment plate 111. A cutting chain 33 is installed between the drive sprockets 32, and a drive mechanism 31 is connected to at least one of the drive sprockets 32.

[0046] As Figure 8 shown, the drive mechanism 31 includes a gearbox 312 mounted on the support plate 114. A servo motor 311 is mounted on the gearbox 312. The output end of the servo motor 311 is connected to the input end of the gearbox 312, and the output end of the gearbox 312 is connected to the drive sprocket 32 through a rotating shaft.

[0047] The pre-tightening support unit 2 includes a support sprocket 23 and a pre-tightening sprocket 22 mounted on the middle longitudinal adjustment component 11. The support sprocket 23 is correspondingly mounted on the adjustment plate 111, and a translation component 21 for moving the pre-tightening sprocket 22 is further installed between the pre-tightening sprocket 22 and the support plate 114.

[0048] An articulated column 122 for articulated connection is provided between the connecting rod 121 and the support plate 114 or the adjustment plate 111. The drive sprocket 32 or the support sprocket 23 is correspondingly mounted on the articulated column 122.

[0049] Chain plates 34 are respectively provided at both ends of the drive sprocket 32, the support sprocket 23, and the pre-tightening sprocket 22.

[0050] As Figure 5 shown, the chain plate 34 includes a first chain plate 341 and a second chain plate 342. The first chain plate 341 passes through the second chain plate 342 through a positioning rod 345 coaxially fixed in the middle. The lower end of the positioning rod 345 is threadedly connected to the articulated column 122. The positioning rod 345 is connected to the sprocket through a radial bearing 344. The upper and lower ends of the sprocket are positioned through axial bearings 343 and abutted against the first chain plate 341 and the second chain plate 342, ensuring the position of the sprocket between the first chain plate 341 and the second chain plate 342, thereby making the movement more stable.

[0051] As Figure 8 shown, the drive sprocket 32 equipped with the drive mechanism 31 is installed on the fixing plate 123 of the articulated column 122 by screwing the second chain plate 342. As Figure 3 shown, the first chain plate 341 is fixed to the second chain plate 342 through a circumferential arc-shaped connecting strip 346.

[0052] A transmission lead screw 115 is correspondingly mounted on the support plate 114. A transmission motor 116 is correspondingly provided on the support plate 114 at one end of the transmission lead screw 115. The output end of the transmission motor 116 is connected to one end of the transmission lead screw 115, and a transmission nut adapted to the transmission lead screw 115 is provided on the adjustment plate 111.

[0053] On both sides of the drive lead screw 115 on the support plate 114, slide rails 113 are respectively installed, and on the adjustment plate 111, sliders 112 adapted to the slide rails 113 are installed correspondingly.

[0054] It further includes a dimension adjustment unit IA1, a trimming unit IA3, and a pre-tightening support unit IA2 with the same structure vertically arranged relative to the dimension adjustment unit 1, the trimming unit 3, and the pre-tightening support unit 2. On the support plate 114 in the longitudinal adjustment assembly 11 on one side, a first right-angle mounting plate 5 is installed, and the dimension adjustment unit 1 and the dimension adjustment unit IA1 are installed together through the first right-angle mounting plate 5.

[0055] It further includes a dimension adjustment unit IIB1, a trimming unit IIB3, and a pre-tightening support unit IIB2 installed on the opposite side of the dimension adjustment unit IA1, the trimming unit IA3, and the pre-tightening support unit IA2. On the support plate 114 in the longitudinal adjustment assembly 11 on the corresponding side, a second right-angle mounting plate 4 is installed, and the dimension adjustment unit 1 and the dimension adjustment unit IIB1 are installed together through the second right-angle mounting plate 4.

[0056] The translation assembly 21 includes a translation electric cylinder 211 installed at one end of the support plate 114. At the output end of the translation electric cylinder 211, a moving block 212 is installed, and a pre-tightening sprocket 22 is elastically installed on the moving block 212;

[0057] On the support plate 114, a guide housing 213 is installed corresponding to the moving block 212, and the moving block 212 is slidably installed inside the guide housing 213.

[0058] At the upper end of the moving block 212, a pre-tightening block 214 with a sliding fit is installed. Between the pre-tightening block 214 and the moving block 212, a pre-tightening spring 215 is installed. The pre-tightening spring 215 is installed between the pre-tightening block 214 and the moving block 212 through a screw passing through the moving block. One end of the screw is threadedly connected to the pre-tightening block 214, and a non-contact position sensor 216 is also installed on the moving block on one side of the screw. By compressing the pre-tightening spring 215 by a certain distance, the non-contact position sensor 216 can be activated through the pre-tightening block 214.

[0059] It further includes a chain positioning assembly 24 installed on the support plate 114 corresponding to the pre-tightening sprocket 22.

[0060] The chain positioning assembly 24 includes a positioning block 241 installed on the support plate 114 in the middle longitudinal adjustment assembly 11. At one end of the positioning block 241, two positioning strips 242 extending outward are provided. On the positioning strips 242, positioning grooves 2421 for accommodating the cutting chain 33 are provided. The two positioning strips 242 are arranged in parallel on the outer circumference of the pre-tightening sprocket 22; on both sides of the positioning groove 2421, guide inclined surfaces 2422 are provided to ensure the stability when the cutting chain 33 passes through.

[0061] Working process or principle:

[0062] For example Figure 1 or Figure 7 Taking the trimming of three sides of a hedge as an example, such as the central green belt of a highway, through the units with the same structure vertically arranged by the size adjustment unit 1, the trimming unit 3 and the pre-tightening support unit 2 (the size adjustment unit ⅠA1, the trimming unit ⅠA3 and the pre-tightening support unit ⅠA2), and the units installed on the opposite sides (the size adjustment unit ⅡB1, the trimming unit ⅡB3 and the pre-tightening support unit ⅡB2). The design of these units enables the trimmer to trim three sides of the hedge simultaneously, achieving efficient trimming. The specific operation is as follows: after determining the height and width of the hedge, drive the transmission nut to move through the drive motor 116. Since the transmission nut is installed on the adjustment plate 111, at this time, the adjustment plate 111 moves. Along with the movement, the distance between adjacent longitudinal adjustment components 11 becomes larger or smaller through two hinged connecting rods 121. Becoming larger is to increase the working length of the front end of the cutting chain 33, and becoming smaller is to decrease the working length of the front end of the cutting chain 33. When it becomes longer, the translation component 21 drives the pre-tightening sprocket 22 to move towards the inner side of the cutting chain 33. When the drive sprocket 32 moves to the position that needs to be adjusted, at this time, the translation component 21 drives the pre-tightening sprocket 22 to move towards the outer side of the cutting chain 33 for pre-tightening; when it becomes smaller, the translation component 21 can directly drive the pre-tightening sprocket 22 to move towards the outer side of the cutting chain 33 for pre-tightening.

[0063] For example Figure 9 For the trimming of two sides of a hedge, just remove the units on one side (the size adjustment unit ⅡB1, the trimming unit ⅡB3 and the pre-tightening support unit ⅡB2). For example, for some roadside hedge green belts, the hedge on one side inside the flower bed does not need to be trimmed, and it can be used after being removed, or the units on both sides can also be removed and used, which is specifically determined according to the hedge to be trimmed, so as to achieve flexible trimming.

[0064] In the present invention, the description of the direction and relative position relationship of the structure, such as the description of front, back, left, right, up and down, does not constitute a limitation to the present invention, but is only for the convenience of description.

Claims

1. A multi-size trimming assembly for a hedge trimmer, characterized in that: include, A size adjustment unit (1) comprises a longitudinal adjustment component (11) and a transverse adjustment component (12) for connection, wherein the longitudinal adjustment component (11) comprises a support plate (114), a slidingly matched adjustment plate (111) is mounted on the support plate (114), at least three groups of longitudinal adjustment components (11) are arranged in the transverse direction, the transverse adjustment components (12) are connected between the longitudinal adjustment components (11), and the transverse adjustment component (12) comprises at least two connecting rods (121), the two connecting rods (121) are hingedly connected in the middle, the same ends of the two connecting rods (121) are hingedly connected to the support plate (114) and the adjustment plate (111), and the other same ends of the two connecting rods (121) are hingedly connected to the support plate (114) and the adjustment plate (111) of adjacent longitudinal adjustment components (11), and when the adjustment plate (111) moves longitudinally, the distance between two adjacent longitudinal adjustment components (11) can be adjusted by the two connecting rods (121); The trimming unit (3) comprises a transmission sprocket (32) mounted on the longitudinal adjustment components (11) on both sides, the transmission sprocket (32) being mounted on the support plate (114) and the adjustment plate (111) respectively, a cutting chain (33) being mounted between the transmission sprockets (32), and at least one of the transmission sprockets (32) being connected to a driving mechanism (31); The pre-tensioning support unit (2) comprises a support sprocket (23) and a pre-tensioning sprocket (22) mounted on the middle longitudinal adjustment assembly (11); the support sprocket (23) is mounted on the adjustment plate (111) correspondingly; and a translation assembly (21) for moving the pre-tensioning sprocket (22) is also mounted between the pre-tensioning sprocket (22) and the support plate (114).

2. The multi-size trimming assembly for a hedge trimmer according to claim 1, characterized in that: A hinge column (122) for hinged connection is provided between the connecting rod (121) and the support plate (114) or the adjustment plate (111), and a driving sprocket (32) or a supporting sprocket (23) is correspondingly mounted on the hinge column (122).

3. The multi-size trimming assembly for a hedge trimmer according to claim 1, characterized in that: Chain plates (34) are respectively provided at both ends of the transmission sprocket (32), the support sprocket (23) and the pre-tensioning sprocket (22).

4. The multi-size trimming assembly for a hedge trimmer according to claim 1, characterized in that: A transmission screw (115) is correspondingly mounted on the support plate (114), a transmission motor (116) is correspondingly arranged on the support plate (114) at one end of the transmission screw (115), an output end of the transmission motor (116) is connected to one end of the transmission screw (115), and a matching transmission nut is arranged on the adjustment plate (111) corresponding to the transmission screw (115).

5. The multi-size trimming assembly for a hedge trimmer according to claim 4, characterized in that: Slide rails (113) are respectively installed on both sides of the driving screw (115) on the support plate (114), and matching slide blocks (112) are installed on the adjustment plate (111) corresponding to the slide rails (113).

6. The multi-size trimming assembly for a hedge trimmer according to claim 1, characterized in that: It also includes a size adjustment unit I (A1), a trimming unit I (A3) and a pre-tightening support unit I (A2) of the same structure arranged vertically with the size adjustment unit (1), the trimming unit (3) and the pre-tightening support unit (2), wherein a first right-angle mounting plate (5) is mounted on the support plate (114) in the longitudinal adjustment assembly (11) on one side, and the size adjustment unit (1) and the size adjustment unit I (A1) are mounted together via the first right-angle mounting plate (5).

7. The multi-size trimming assembly for a hedge trimmer according to claim 6, characterized in that: It also includes a size adjustment unit II (B1), a trimming unit II (B3) and a pre-tightening support unit II (B2) installed on the opposite sides of the size adjustment unit I (A1), the trimming unit I (A3) and the pre-tightening support unit I (A2); a second right-angle mounting plate (4) is installed on the support plate (114) in the longitudinal adjustment assembly (11) on the corresponding side; the size adjustment unit (1) and the size adjustment unit II (B1) are installed together via the second right-angle mounting plate (4).

8. The multi-size trimming assembly for a hedge trimmer according to claim 1, characterized in that: The translation assembly (21) comprises a translation electric cylinder (211) mounted on one end of the support plate (114); a moving block (212) is mounted on the output end of the translation electric cylinder (211); and a pre-tightening sprocket (22) is elastically mounted on the moving block (212); A guide housing (213) is installed on the support plate (114) corresponding to the moving block (212), and the moving block (212) is slidably installed in the guide housing (213).

9. The multi-size trimming assembly for a hedge trimmer according to claim 8, characterized in that: It also includes a chain positioning assembly (24) mounted on the support plate (114) corresponding to the pre-tensioning sprocket (22).

10. The multi-size trimming assembly for a hedge trimmer according to claim 9, characterized in that: The chain positioning assembly (24) comprises a positioning block (241) mounted on a support plate (114) in the middle longitudinal adjustment assembly (11); one end of the positioning block (241) is provided with two positioning strips (242) extending outward; the positioning strips (242) are provided with positioning grooves (2421) for accommodating the cutting chain (33) to pass through; the two positioning strips (242) are arranged in parallel on the outer side of the circumference of the pre-tightening sprocket (22).

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