Multi-size trimming assembly of hedge trimmer

Abstract

The invention relates to a multi-size pruning assembly of a hedge pruning machine, and belongs to the technical field of hedge pruning. Comprising a size adjusting unit, a trimming unit and a pre-tightening supporting unit. The size adjusting unit is composed of a longitudinal adjusting assembly and a transverse adjusting assembly, and flexible adjustment of different sizes is achieved through longitudinal sliding of an adjusting plate and hinged connection of a connecting rod. The trimming unit completes trimming work through cooperation of a transmission chain wheel and a cutting chain and a driving mechanism. The pre-tightening supporting unit ensures the stability and tension of the cutting chain in the trimming process through a supporting chain wheel, a pre-tightening chain wheel and a translation assembly. The multi-size trimming assembly of the hedge trimmer has the advantages of overall adjustment, high safety and adaptability to trimming of various sizes. By flexibly adjusting components in the size adjusting unit, the trimming requirements of hedges with different heights and widths can be met.

Description

Technical Field

[0001] The invention relates to a multi-size trimming assembly of a hedge trimmer and belongs to the technical field of hedge trimming. Background Art

[0002] In the work of sanitation and greening, it is very important to maintain the beauty and neatness of green belt hedges, which requires frequent and fine trimming of the appearance of green belt hedges. However, the current way of trimming green belt hedges is still relatively traditional, mainly relying on manual operation: the staff first use ropes to roughly level to ensure that the outline of the trimmed hedges is neat and uniform, and then use handheld scissors or more basic power tools to trim them one by one. This traditional hedge trimming method is not only inefficient, but also poses a considerable hidden danger to the personal safety of the operator. During the trimming process, the operator needs to keep bending over or raising his arms for a long time, which can easily lead to physical fatigue and muscle strain.

[0003] More importantly, in special environments such as highways, the difficulty and danger of pruning work are further increased due to the full closure of the road section and the long mileage. Operators not only need to face the potential safety risks brought by high-speed vehicles, 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 publication number CN111226624A comprises 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 an end away from the fixed mounting plate, and the left second connecting rod is hinged with the left door rod at an end away from the left first connecting rod; the left door rod is provided with a cross bar extending in a direction perpendicular to the left door rod and the left second connecting rod at an end away from the fixed mounting plate; the cross section of the cross bar is non-circular, the right door rod is slidably connected to the cross bar, and a first electric push rod for driving the right door rod to slide along the direction of the cross bar is fixedly installed on the cross bar; the left door rod is provided with a left trimming assembly, the right door rod is provided with a right trimming assembly, and the horizontal rod is provided with a horizontal trimming assembly; the cross bar is provided with a power assembly; the sanitation hedge trimmer uses the mutual cooperation of three sets of trimming teeth to enable the trimmer to trim three sides of the hedge at the same time, thereby achieving efficient trimming.

[0005] The inventors have discovered that the prior art has at least the following technical problems: During the pruning process, the required height and width of each green belt hedge are different. After the above-mentioned pruning device is adjusted, the saw teeth on one side will extend outward, posing a safety hazard. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a multi-size pruning assembly for a hedge trimmer, which can be adjusted as a whole, has better safety, and can achieve pruning of various sizes.

[0007] The multi-size trimming assembly of the hedge trimmer of the present invention comprises: The size adjustment unit includes a longitudinal adjustment component and a lateral adjustment component for connection, the longitudinal adjustment component includes a support plate, a sliding adjustment plate is installed on the support plate, at least three groups of longitudinal adjustment components are arranged in the lateral direction, and the lateral adjustment components are connected between the longitudinal adjustment components. The lateral adjustment component includes at least two connecting rods, the two connecting rods 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 components. When the adjustment plate moves longitudinally, the distance between the two adjacent longitudinal adjustment components can be adjusted by the two connecting rods; The trimming unit includes transmission sprockets installed on the longitudinal adjustment components on both sides, the transmission sprockets are respectively installed on the support plate and the adjustment plate, a cutting chain is installed between the transmission sprockets, and at least one of the transmission sprockets is connected to a driving mechanism; The preload support unit comprises a support sprocket and a preload sprocket installed on the middle longitudinal adjustment assembly. The support sprocket is correspondingly installed on the adjustment plate. A translation assembly for moving the preload sprocket is also installed between the preload sprocket and the support plate.

[0008] Furthermore, a hinge column for hinged connection is provided between the connecting rod and the supporting plate or the adjusting plate, and a driving sprocket or a supporting sprocket is correspondingly mounted on the hinge column.

[0009] Furthermore, chain plates are respectively provided at both ends of the transmission sprocket, the support sprocket and the pre-tensioning sprocket.

[0010] Furthermore, a transmission screw is correspondingly installed on the support plate, a transmission motor is correspondingly arranged on the support plate at one end of the transmission screw, an output end of the transmission motor is connected to one end of the transmission screw, and a corresponding transmission nut is arranged on the adjustment plate corresponding to the transmission screw.

[0011] Furthermore, slide rails are respectively installed on both sides of the driving screw on the support plate, and matching sliding blocks are installed on the corresponding slide rails on the adjustment plate.

[0012] Furthermore, it also includes a size adjustment unit I, a trimming unit I and a pre-tensioning support unit I with the same structure and arranged vertically with the size adjustment unit, the trimming unit and the pre-tensioning support unit, wherein 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.

[0013] Furthermore, it also includes a size adjustment unit II, a trimming unit II and a pre-tensioning support unit II installed on the opposite sides of the size adjustment unit I, the trimming unit I and the pre-tensioning 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.

[0014] Further, the translation assembly includes a translation electric cylinder mounted on one end of the support plate, a moving block is mounted on the output end of the translation electric cylinder, and a pre-tightening sprocket is elastically mounted on the moving block; A guide housing is installed on the support plate corresponding to the moving block, and the moving block is slidably installed in the guide housing.

[0015] Furthermore, it also includes a chain positioning assembly mounted on the support plate corresponding to the pre-tightening sprocket.

[0016] Furthermore, the chain positioning assembly includes a positioning block installed on the support plate in the middle longitudinal adjustment assembly, one end of the positioning block is provided with two positioning strips extending outward, the positioning strips are provided with positioning grooves for accommodating the cutting chain, and the two positioning strips are arranged in parallel on the outer side of the circumference of the pre-tensioning sprocket.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The size adjustment unit of the present invention allows the trimming assembly to be adjusted in the longitudinal and transverse directions to meet the needs of trimming hedges 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.

[0018] The present invention also includes units of the same structure (size adjustment unit I, pruning unit I and pre-tightening support unit I) arranged vertically with the size adjustment unit, the pruning unit and the pre-tightening support unit, and units installed on the opposite side (size adjustment unit II, pruning unit II and pre-tightening support unit II). The design of these units enables the trimmer to trim three sides of the hedge at the same time, achieving efficient pruning. Through overall adjustment, safety is higher, and pruning of various sizes can be achieved. By adjusting the moving distance between the support plate and the adjustment plate in the size adjustment unit and adjusting the angle of the connecting rod in the lateral adjustment assembly, the size of the trimming assembly can be flexibly adjusted to meet the needs of hedge pruning of different heights and widths. At the same time, since the trimming assembly is adjusted as a whole, the safety hazard of the saw teeth on one side extending outward during the pruning process can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a three-side trimming structure of Embodiment 1 of the present invention; Figure 2 is a front view of Embodiment 1 of the present invention; Figure 3is a schematic structural diagram of Embodiment 1 of the present invention; Figure 4 is a schematic diagram of the structure of a size adjustment unit in Embodiment 1 of the present invention; Figure 5 Schematic diagram of the internal structure of the chain plate of Example 1 of the present invention; Figure 6 is a schematic diagram of the internal structure of the positioning block of Example 1 of the present invention; Figure 7 is a schematic diagram of the adjusted structure of Example 1 of the present invention; Figure 8 yes Figure 7 A partial enlarged view of the middle part; Fig. 9 is a schematic diagram of the two-side trimming structure of Example 1 of the present invention; In the figure: 1. Size adjustment unit; 111. Adjustment plate; 112. Sliding block; 113. Slide rail; 114. Support plate; 115. Transmission screw; 116. Transmission motor; 11. Adjustment assembly; 12. Lateral adjustment assembly; 121. Connecting rod; 122. Articulated column; 123. Fixed plate; 2. Preload support unit; 21. Translation assembly; 211. Translation electric cylinder; 212. Moving block; 213. Guide housing; 214. Preload block; 215. Preload spring; 216. Non-contact position sensor; 22. Preload sprocket; 23. Support sprocket; 24. Chain positioning assembly; 241. Positioning block; 242. Positioning strip; 2421. Positioning groove; 2422. Guide ramp; 3. trimming unit; 31. driving mechanism; 311. servo motor; 312. gearbox; 32. transmission 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-shaped connecting strip; 4. Second right angle mounting plate; 5. The first right angle mounting plate; A1, size adjustment unit Ⅰ; A2, preload support unit Ⅰ; A3, trimming unit Ⅰ; B1. Size adjustment unit II; B2. Preload support unit II; B3. Trimming unit II. DETAILED DESCRIPTION

[0020] Example 1 like Figures 1 to 9 As shown, the hedge trimmer multi-size trimming assembly of the present invention comprises: The size adjustment unit 1 includes a longitudinal adjustment component 11 and a lateral adjustment component 12 for connection. The longitudinal adjustment component 11 includes a support plate 114, on which a sliding adjustment plate 111 is installed. At least three groups of longitudinal adjustment components 11 are arranged in the lateral direction. The lateral adjustment components 12 are connected between the longitudinal adjustment components 11. The lateral adjustment components 12 include 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 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 components 11. When the adjustment plate 111 moves longitudinally, the distance between the two adjacent longitudinal adjustment components 11 can be adjusted by the two connecting rods 121. The trimming unit 3 includes a transmission sprocket 32 ​​installed on the longitudinal adjustment components 11 on both sides, the transmission sprocket 32 ​​is respectively installed on the support plate 114 and the adjustment plate 111, a cutting chain 33 is installed between the transmission sprockets 32, and a driving mechanism 31 is connected to at least one of the transmission sprockets 32; like Figure 8 As shown, the driving 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 transmission sprocket 32 ​​through a rotating shaft.

[0021] The preload support unit 2 includes a support sprocket 23 and a preload sprocket 22 installed on the middle longitudinal adjustment component 11. The support sprocket 23 is correspondingly installed on the adjustment plate 111. A translation component 21 for moving the preload sprocket 22 is also installed between the preload sprocket 22 and the support plate 114.

[0022] A hinge column 122 for hinged connection is provided between the connecting rod 121 and the supporting plate 114 or the adjusting plate 111 , and a driving sprocket 32 ​​or a supporting sprocket 23 is correspondingly mounted on the hinge column 122 .

[0023] Chain plates 34 are respectively provided at both ends of the driving sprocket 32 ​​, the supporting sprocket 23 and the pre-tensioning sprocket 22 .

[0024] like Figure 5 As 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 coaxially fixed intermediate positioning rod 345. The lower end of the positioning rod 345 is connected to the hinge column 122 by a thread. The positioning rod 345 is connected to the sprocket through a radial bearing 344. The upper and lower ends of the sprocket are positioned by an axial bearing 343 and abut against the first chain plate 341 and the second chain plate 342, thereby ensuring the position of the sprocket between the first chain plate 341 and the second chain plate 342, thereby making the movement more stable.

[0025] like Figure 8 As shown, the transmission sprocket 32 ​​with the driving mechanism 31 is installed by screwing the second chain plate 342 to the fixing plate 123 on the hinge column 122, as shown in FIG. Figure 3 As shown, the first link plate 341 is fixed to the second link plate 342 via a circumferential arc-shaped connecting strip 346 .

[0026] A transmission screw 115 is correspondingly installed 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 correspondingly arranged on the adjustment plate 111 for the transmission screw 115 .

[0027] Slide rails 113 are respectively installed on both sides of the driving screw 115 on the support plate 114 , and matching sliders 112 are installed on the adjustment plate 111 corresponding to the slide rails 113 .

[0028] It also includes a size adjustment unit IA1, a trimming unit IA3 and a pre-tensioning support unit IA2 of the same structure arranged vertically with the size adjustment unit 1, the trimming unit 3 and the pre-tensioning 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 IA1 are mounted together via the first right-angle mounting plate 5.

[0029] It also includes a size adjustment unit IIB1, a trimming unit IIB3 and a pre-tensioning support unit IIB2 installed on the opposite sides of the size adjustment unit IA1, the trimming unit IIA3 and the pre-tensioning support unit IA2, and a second right-angle mounting plate 4 is installed on the support plate 114 in the longitudinal adjustment assembly 11 on the corresponding side, and the size adjustment unit 1 and the size adjustment unit IIB1 are installed together through the second right-angle mounting plate 4.

[0030] The translation assembly 21 includes 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 .

[0031] A sliding pre-tightening block 214 is installed on the upper end of the moving block 212, and a pre-tightening spring 215 is installed between the pre-tightening block 214 and the moving block 212. The pre-tightening spring 215 passes through the moving block through a screw and is installed between the pre-tightening block 214 and the moving block 212. One end of the screw is threadedly connected to the pre-tightening block 214. A non-contact position sensor 216 is also installed on the moving block on one side of the screw. The non-contact position sensor 216 can be activated by compressing the pre-tightening spring 215 by a certain distance through the pre-tightening block 214.

[0032] The chain positioning assembly 24 is mounted on the support plate 114 corresponding to the pre-tensioning sprocket 22 .

[0033] The chain positioning assembly 24 includes a positioning block 241 installed on the support plate 114 in the middle longitudinal adjustment assembly 11, and one end of the positioning block 241 is provided with two positioning bars 242 extending outward, and the positioning bars 242 are provided with positioning grooves 2421 for accommodating the passage of the cutting chain 33. The two positioning bars 242 are arranged in parallel on the outer side of the circumference of the pre-tensioning sprocket 22; guide slopes 2422 are provided on both sides of the positioning groove 2421 to ensure the stability of the cutting chain 33 when passing through.

[0034] Working process or working principle: like Figure 1 or Figure 7 Take the three-side trimming of a hedge as an example, such as the green belt in the middle of a highway, through the vertical arrangement of the size adjustment unit 1, the trimming unit 3 and the pre-tension support unit 2, the same structure units (size adjustment unit IA1, trimming unit IA3 and pre-tension support unit IA2), and the units installed on the opposite side (size adjustment unit ⅡB1, trimming unit ⅡB3 and pre-tension support unit ⅡB2). The design of these units enables the trimmer to trim the three sides of the hedge at the same time, achieving efficient trimming. The specific operation is that after the height and width of the hedge are determined, the transmission motor 116 drives the transmission nut to move. Since the transmission nut is installed on the adjustment plate 111, the adjustment plate 111 moves at this time. As it moves, the distance between adjacent longitudinal adjustment components 11 is increased or decreased through two hinged connecting rods 121. When it increases, the working length of the front end of the cutting chain 33 is lengthened, and when it decreases, the working length of the front end of the cutting chain 33 is reduced. When it increases, the translation component 21 drives the pre-tightening sprocket 22 to move toward the inside of the cutting chain 33. When the transmission sprocket 32 ​​moves to the position that needs to be adjusted, the translation component 21 drives the pre-tightening sprocket 22 to move toward the outside of the cutting chain 33 for pre-tightening; when it decreases, the translation component 21 can directly drive the pre-tightening sprocket 22 to move toward the outside of the cutting chain 33 for pre-tightening.

[0035] like Fig. 9To trim both sides of the hedge, just disassemble the units on one side (size adjustment unit ⅡB1, trimming unit ⅡB3 and preload support unit ⅡB2). For example, in some roadside hedge green belts, the hedge on one side inside the flower bed does not need to be trimmed and can be disassembled for use. Alternatively, both sides can be disassembled for use, depending on the hedge to be trimmed, so as to achieve flexible trimming.

[0036] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of 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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