blade set

Abstract

This utility model discloses a blade assembly, including a long strip-shaped first blade (1) and second blade (2), a pressure bar (3), and a support bar (4); the driving structure includes a driving gear (9), a first driving ring (10) located at the tail end of the first blade (1), a second driving ring (11) located at the tail end of the second blade (2), a first driving block (12), and a second driving block (13); a third driving block (14) is provided inside the driving gear (9), the third driving block (14) is eccentrically located inside the driving gear (9), the first driving block (12) and the third driving block (14) are coaxially mounted, and the first driving block (13), the third driving block (14) and the driving gear (9) are an integral structure. This blade assembly integrates the driving block of the blade near the driving gear into the driving gear, thereby reducing the mating clearance and mating accuracy, and facilitating assembly.

Description

Technical Field

[0001] This utility model relates to the field of garden equipment technology, specifically a blade assembly. Background Technology

[0002] Current pruning machine drive mechanisms have various structures, such as crankshaft connecting rod mechanisms, cam mechanisms (the mainstream), or rack and pinion mechanisms, which efficiently and reliably convert the rotational motion generated by the engine or motor into the high-speed linear reciprocating motion required by the moving blades. In the double-moving-blade design, a clever 180° phase difference design achieves the opposite synchronous motion of the two moving blades. Another approach involves adding a circular drive block inside the ring at the tail of the blade to push it back and forth. For two blades, two drive blocks are needed. These drive blocks are connected to a drive gear via a connecting structure. The rotation of the drive gear drives the two drive blocks, which in turn drives the respective blades to slide. This type of drive mechanism requires two drive blocks, necessitating high clearance and precision during assembly, significantly increasing the difficulty of assembly. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a blade assembly that integrates the drive block of the blade close to the drive gear onto the drive gear, thereby reducing the requirements for mating clearance, reducing the requirements for mating accuracy, and facilitating assembly.

[0004] The technical solution of this utility model is to provide a blade assembly with the following structure: a long strip-shaped first blade and second blade, a pressure bar, and a support bar; the first blade has first cutting heads arranged at several intervals on one side and second cutting heads arranged at several intervals on the other side; the second blade has third cutting heads arranged at several intervals on one side and fourth cutting heads arranged at several intervals on the other side; the pressure bar is located on the top surface of the first blade, and the support bar is located at the bottom of the second blade; the pressure bar and the support bar are fastened by multiple sets of bolts, and a space is provided between them to accommodate the first and second blades. The bolts of the fixing mechanism pass through the elongated holes of the first and second cutter bars for sliding guidance of the first and second cutter bars. The tail end of the blade assembly is provided with a driving structure. The driving structure includes a driving gear, a first driving ring located at the tail end of the first cutter bar, a second driving ring located at the tail end of the second cutter bar, a first driving block, and a second driving block. The first driving block is located inside the first driving ring, the second driving block is located inside the second driving ring, and a third driving block is provided inside the driving gear. The third driving block is eccentrically located inside the driving gear. The first driving block and the third driving block are coaxially mounted, and the first driving block, the third driving block, and the driving gear are an integral structure.

[0005] The drive gear has a central hole, a first positioning hole and a second positioning hole. The central hole, the first positioning hole and the second positioning hole are located inside the third drive block. The first positioning hole and the second positioning hole are symmetrical about the central hole.

[0006] A driving rod is fixed to the first positioning hole and the second positioning hole respectively. The two driving rods pass through the two through holes of the second driving block. The positions of the two through holes are symmetrical about the front and back of the circumference with the positions of the first positioning hole and the second positioning hole.

[0007] A first partition is provided between the first drive ring and the second drive ring, and a second partition is provided at the bottom of the second drive ring. The area of ​​the first partition and the second partition is smaller than the area of ​​the first drive ring and the second drive ring.

[0008] The heads of the two drive rods have annular protrusions, and the tail ends pass through the second partition, the second drive block, the first partition, and the drive gear in sequence.

[0009] The first and third cutter heads have protruding cutter heads at their front ends, which are trapezoidal in shape and have a recess at the top edge.

[0010] With the above structure, this utility model has the following advantages: The drive structure includes a drive gear, a first drive ring located at the tail end of the first cutter bar, a second drive ring located at the tail end of the second cutter bar, a first drive block, and a second drive block. The first drive block is located inside the first drive ring, and the second drive block is located inside the second drive ring. The first drive block drives the first drive ring to move back and forth, and the second drive block drives the second drive ring to move back and forth. A third drive block is provided inside the drive gear, eccentrically located within the drive gear. The first drive block and the third drive block are coaxially mounted, and the first drive block, the third drive block, and the drive gear are an integral structure. This eliminates the need for assembling the first drive block, completing the installation simultaneously with the drive gear installation. This reduces the clearance and precision of the fit, facilitating assembly.

[0011] As an improvement, the drive gear is provided with a central hole, a first positioning hole, and a second positioning hole, which are located within the third drive block. The first and second positioning holes are symmetrical about the central hole. A sophisticated 180° phase difference design enables the two moving blades to move synchronously in opposite directions.

[0012] As an improvement, a driving rod is fixed to the first positioning hole and the second positioning hole respectively. The two driving rods pass through the two through holes of the second driving block. The positions of the two through holes are symmetrical about the front and back of the circumference with the positions of the first positioning hole and the second positioning hole. The rotation of the driving gear drives the first driving block and the second driving block through the two driving rods.

[0013] As an improvement, a first partition is provided between the first drive ring and the second drive ring, and a second partition is provided at the bottom of the second drive ring. The area of ​​the first partition and the second partition is smaller than the area of ​​the first drive ring and the second drive ring, which serves to ensure the spacing.

[0014] As an improvement, the heads of the two drive rods have annular protrusions, and the tail ends pass through the second partition, the second drive block, the first partition and the drive gear in sequence to play an axial role. Attached Figure Description

[0015] Figure 1 This is an exploded view of the blade assembly of this utility model.

[0016] Figure 2 This is a front view of the blade assembly of this utility model.

[0017] Figure 3 This is a schematic diagram of the back of the blade assembly of this utility model.

[0018] Figure 4 This is a schematic diagram of the installation of the first blade of this utility model.

[0019] Figure 5 This is a front view of the drive gear of this utility model.

[0020] Figure 6 This is a schematic diagram of the back of the drive gear of this utility model.

[0021] Figure 7 This is a schematic diagram showing the connection between the first driving block and the driving rod of this utility model.

[0022] As shown in the figure,

[0023] 1. First cutter bar, 2. Second cutter bar, 3. Pressure bar, 4. Support bar, 5. First cutter head, 6. Second cutter head, 7. Third cutter head, 8. Fourth cutter head, 9. Drive gear, 10. First drive ring, 11. Second drive ring, 12. First drive block, 13. Second drive block, 14. Third drive block, 15. Center hole, 16. First positioning hole, 17. Second positioning hole, 18. Drive rod, 19. First partition, 20. Second partition. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-7As shown, the blade assembly of this utility model includes a long strip-shaped first blade 1 and second blade 2, a pressure strip 3, and a support strip 4. The first blade 1 has first blade heads 5 arranged at several intervals on one side and second blade heads 6 arranged at several intervals on the other side. The second blade 2 has third blade heads 7 arranged at several intervals on one side and fourth blade heads 8 arranged at several intervals on the other side. The front ends of the first blade heads 5 and third blade heads 7 have protruding blade heads, forming a trapezoidal structure, and the top edge has a recess. The second blade heads 6 and fourth blade heads 8 are trapezoidal and shorter than the first blade heads 5 and third blade heads 7.

[0026] The pressure strip 3 is located on the top surface of the first blade 1, and the support strip 4 is located at the bottom of the second blade 2. The pressure strip 3 and the support strip 4 are fastened together by a multi-set bolt fastening mechanism, and a space is provided between them to accommodate the first blade 1 and the second blade 2. The bolts of the multi-set bolt fastening mechanism pass through the elongated holes of the first blade 1 and the second blade 2 for sliding guidance of the first blade 1 and the second blade 2. The tail end of the blade assembly is provided with a driving structure. The pressure strip 3 and the support strip 4 have through holes for the bolts to pass through.

[0027] like Figure 1 and Figure 2 As shown, the driving structure includes a driving gear 9, a first driving ring 10 located at the tail end of the first cutter bar 1, a second driving ring 11 located at the tail end of the second cutter bar 2, a first driving block 12, and a second driving block 13; the first driving block 12 is located inside the first driving ring 10, the second driving block 13 is located inside the second driving ring 11, a third driving block 14 is provided inside the driving gear 9, the third driving block 14 is eccentrically located inside the driving gear 9, the first driving block 12 and the third driving block 14 are coaxially mounted, and the first driving block 13, the third driving block 14 and the driving gear 9 are an integral structure.

[0028] like Figure 6 As shown, the drive gear 9 has a central hole 15, a first positioning hole 16, and a second positioning hole 17. The central hole 15, the first positioning hole 16, and the second positioning hole 17 are located within the third drive block 14, and the first positioning hole 16 and the second positioning hole 17 are symmetrical about the central hole 15. The central hole 15 is located at the center of the drive gear 9 and at an off-center position in the third drive block 14. The centers of the central hole 15, the first positioning hole 16, and the second positioning hole 17 are on a straight line.

[0029] like Figure 7 As shown, a drive rod 18 is fixed to the first positioning hole 16 and the second positioning hole 17 respectively. The two drive rods 18 pass through the two through holes of the second drive block 13. The positions of the two through holes are symmetrical about the front and back of the circumference with the positions of the first positioning hole 16 and the second positioning hole 17.

[0030] like Figure 1 As shown, a first partition 19 is provided between the first drive ring 10 and the second drive ring 11, and a second partition 20 is provided at the bottom of the second drive ring 11. The area of ​​the first partition 19 and the second partition 20 is smaller than the area of ​​the first drive ring 10 and the second drive ring 11.

[0031] like Figure 5 As shown, the heads of the two drive rods 18 have annular protrusions, and the tail ends pass through the second partition 20, the second drive block 13, the first partition 19 and the drive gear 9 in sequence.

Claims

1. A blade assembly, comprising a first blade (1) and a second blade (2) of elongated shape, a pressure bar (3) and a support bar (4); the first blade (1) has a first blade head (5) arranged at several intervals on one side and a second blade head (6) arranged at several intervals on the other side; the second blade (2) has a third blade head (7) arranged at several intervals on one side and a fourth blade head (8) arranged at several intervals on the other side; the pressure bar (3) is located on the top surface of the first blade (1); the support bar (4) is located at the bottom of the second blade (2); the pressure bar (3) and the support bar (4) are fastened by a multi-set bolt fastening mechanism, and a space for accommodating the first blade (1) and the second blade (2) is provided between them; the bolts of the multi-set bolt fastening mechanism pass through the elongated holes of the first blade (1) and the second blade (2) for sliding guidance of the first blade (1) and the second blade (2); the tail end of the blade assembly is provided with a driving structure, characterized in that: The driving structure includes a driving gear (9), a first driving ring (10) located at the tail end of the first cutter bar (1), a second driving ring (11) located at the tail end of the second cutter bar (2), a first driving block (12), and a second driving block (13); the first driving block (12) is located inside the first driving ring (10), the second driving block (13) is located inside the second driving ring (11), a third driving block (14) is provided inside the driving gear (9), the third driving block (14) is eccentrically located inside the driving gear (9), the first driving block (12) and the third driving block (14) are coaxially mounted, and the first driving block (13), the third driving block (14) and the driving gear (9) are an integral structure.

2. The blade set of claim 1, wherein: The drive gear (9) is provided with a center hole (15), a first positioning hole (16) and a second positioning hole (17). The center hole (15), the first positioning hole (16) and the second positioning hole (17) are located inside the third drive block (14). The first positioning hole (16) and the second positioning hole (17) are symmetrical about the center hole (15).

3. The blade set of claim 2, wherein: A drive rod (18) is fixed to the first positioning hole (16) and the second positioning hole (17). The two drive rods (18) pass through the two through holes of the second drive block (13). The positions of the two through holes are symmetrical about the front and back of the circumference with the positions of the first positioning hole (16) and the second positioning hole (17).

4. The blade set of claim 1, wherein: A first partition (19) is provided between the first drive ring (10) and the second drive ring (11), and a second partition (20) is provided at the bottom of the second drive ring (11). The area of ​​the first partition (19) and the second partition (20) is smaller than the area of ​​the first drive ring (10) and the second drive ring (11).

5. The blade set of claim 3, wherein: The heads of the two drive rods (18) have annular protrusions, and the tail ends pass through the second partition (20), the second drive block (13), the first partition (19) and the drive gear (9) in sequence.

6. The blade set of claim 1, wherein: The front ends of the first cutter head (5) and the third cutter head (7) are provided with protruding cutter heads, which are trapezoidal in shape and have a recess on the top edge.

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