Tool structure for mini-tiller and mini-tiller

Abstract

The utility model discloses a tool structure and micro -tiller for micro -tiller, include: main shaft and a plurality of cutterhead subassembly, main shaft is equipped with a plurality of mounting point in interval, a plurality of cutterhead subassembly is established in a plurality of mounting point one -to -one corresponding, and includes first cutter, second cutter and connecting axle sleeve, first cutter and second cutter are opposite and set up the opposite two ends of connecting axle sleeve, and connecting axle sleeve is configured as can dismantle and sets up at corresponding mounting point.

Description

Technical Field

[0001] This utility model relates to the field of micro-tiller technology, specifically to a blade structure for a micro-tiller and a micro-tiller. Background Technology

[0002] Traditional mini tillers typically use a one-piece welded cutter shaft, meaning the cutter discs are directly welded to the main shaft. While this structure is simple and rigid, the disc spacing is fixed at the main shaft during manufacturing, resulting in a narrow working width and making it impossible to adjust according to operational needs (such as soil conditions, crop residue levels, and required tillage width). Changing the working width often requires replacing the entire cutter shaft or the entire set of cutters, which is costly and cumbersome.

[0003] Therefore, in the prior art, multiple cutter heads are installed independently and detachably on the spindle, so that the working width can be adjusted by increasing or decreasing the number of cutter heads or changing the installation position (or spacing) of the cutter heads on the spindle; this results in too many connection nodes and makes the installation cumbersome. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a blade structure for a micro-tiller and a micro-tiller, so as to solve the problem of cumbersome blade installation in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The blade structure for a mini tiller includes:

[0007] The spindle has multiple mounting points spaced apart;

[0008] Multiple cutter head assemblies are provided at multiple mounting points, one for each of them, and include a first cutter head, a second cutter head, and a connecting bushing. The first cutter head and the second cutter head are arranged opposite each other at opposite ends of the connecting bushing, and the connecting bushing is configured to be detachably provided at the corresponding mounting point.

[0009] Furthermore, the mounting point is a mounting hole formed on the spindle, the connecting shaft is fitted with a connecting hole, and the connector passes through the mounting hole and the connecting hole.

[0010] Furthermore, the connector is a bolt, and a nut is provided at the connection hole. The connector passes through the mounting hole and the connection hole and is inserted into the nut.

[0011] Furthermore, the first cutter head and / or the second cutter head are welded to the connecting bushing.

[0012] Furthermore, the first cutter head and / or the second cutter head are provided with through holes to avoid the connecting bushing.

[0013] Furthermore, the inner wall of the through hole extends inward to form a limiting protrusion, and the connecting shaft sleeve is provided with a matching limiting groove, so that the limiting protrusion is engaged in the limiting groove.

[0014] Furthermore, the limiting protrusion has an arc-shaped structure.

[0015] Furthermore, when both the first cutter head and the second cutter head are provided with through holes, the two limiting protrusions provided at the two through holes are staggered.

[0016] Furthermore, the first cutter head and / or the second cutter head have a plurality of blades arranged in a circumferential array, and the ends of the blades are formed with bent sections, and the two bent sections of two adjacent blades are bent in opposite directions.

[0017] A mini-tiller, including: the blade structure for a mini-tiller described above.

[0018] Compared to existing technologies, this invention offers the following advantages: The first and second cutter discs are connected via a connecting bushing, and the first and second cutter discs are mounted on the spindle via a detachable connection between the connecting bushing and the spindle. This allows for the replacement of the first and second cutter discs with different spacings as a whole, and replaces the original multi-point distributed connection method with a single-point reinforced connection, making disassembly and assembly easier. Furthermore, the symmetrical distribution of the first and second cutter discs can counteract the centrifugal torque during spindle rotation, reducing the vibration amplitude at the spindle connection point and thus preventing loosening of the connection between the spindle and the connecting bushing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the blade structure for a micro-tiller according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the blade structure for a micro-tiller according to another embodiment of the present invention;

[0021] Figure 3 This is a partially exploded schematic diagram of the blade structure for a micro-tiller according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a cutter head assembly according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the first and second cutter heads according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the connecting bushing according to an embodiment of the present invention.

[0025] The reference numerals in the accompanying drawings include:

[0026] 1. Spindle; 101. Mounting hole; 2. Cutter head assembly; 201. First cutter head; 202. Second cutter head; 203. Connecting bushing; 204. Connecting hole; 3. Bolt; 4. Nut; 5. Through hole; 6. Limiting protrusion; 7. Limiting groove; 8. Cutting tool; 801. Bending section. Detailed Implementation

[0027] The present invention will be further described in detail below through specific embodiments:

[0028] In the embodiments of this utility model, such as Figure 1 , Figure 2 As shown, the blade structure for a micro-tiller includes: a main shaft 1 and multiple cutter disc assemblies 2; the main shaft 1 has multiple mounting points spaced apart; the multiple cutter disc assemblies 2 are correspondingly disposed at the multiple mounting points, and include a first cutter disc 201, a second cutter disc 202 and a connecting bushing 203, the first cutter disc 201 and the second cutter disc 202 are disposed opposite to each other at opposite ends of the connecting bushing 203, and the connecting bushing 203 is configured to be detachably disposed at the corresponding mounting point.

[0029] Specifically, in this embodiment of the invention, the spindle 1 serves as a drive shaft and can be connected to a drive assembly to drive the spindle 1 to rotate. Furthermore, a mounting point is provided at each of the two symmetrical positions of the spindle 1 for mounting the cutter head assembly 2.

[0030] In this embodiment of the invention, the cutter head assembly 2 includes a first cutter head 201, a second cutter head 202, and a connecting sleeve 203. The first cutter head 201 and the second cutter head 202 are arranged opposite each other at opposite ends of the connecting sleeve 203, and the connecting sleeve 203 is coaxially sleeved on the spindle 1 and detachably installed at the mounting point. In this embodiment, since there are two mounting points, there are also two cutter head assemblies 2. The first cutter head 201 and the second cutter head 202 are connected by the connecting sleeve 203 and then installed on the spindle 1 using the connecting sleeve 203. This replaces the traditional multi-point distributed connection method with the single-point reinforced connection in this embodiment. During assembly and disassembly, only the connection node between the spindle 1 and the connecting sleeve 203 needs to be addressed. At the same time, the overall modular design of the first cutter head 201 and the second cutter head 202 allows for the selection of a suitable spacing between the first cutter head 201 and the second cutter head 202 according to the working width, eliminating the need to adjust the spacing one by one, making it more convenient and faster. Furthermore, since the first cutter head 201 and the second cutter head 202 are symmetrically distributed at opposite ends of the connecting sleeve 203, they can counteract the centrifugal torque of the spindle 1 during rotation, reduce the vibration amplitude of the connection point of the spindle 1, thereby preventing the connection node from loosening and improving its dynamic stability. Of course, the distribution of the two cutter heads at both ends of the connecting sleeve 203 can extend the distance between them, which not only provides a wider working width but also does not interfere with the installation of the spindle 1 and the connecting sleeve 203.

[0031] In this embodiment, the first cutter head 201 and the second cutter head 202 are connected by a connecting bushing 203, and the connecting bushing 203 is detachably installed on the spindle 1, thus avoiding the problem of complicated assembly and disassembly caused by too many connection nodes.

[0032] like Figure 3 As shown, in one embodiment, the mounting point is a mounting hole 101 formed in the spindle 1, and the connecting sleeve 203 is provided with a connecting hole 204. The connector passes through the mounting hole 101 and the connecting hole 204. Specifically, in order to achieve a detachable connection between the spindle 1 and the connecting sleeve 203, this embodiment provides a mounting hole 101 that can radially penetrate the spindle 1 (this mounting hole 101 is the mounting point); similarly, a connecting hole 204 that can radially penetrate the connecting sleeve 203 is provided in the connecting sleeve 203. The connecting sleeve 203 is fitted onto the spindle 1, and the mounting hole 101 and the connecting hole 204 are connected. Finally, the two are connected using a connector.

[0033] Preferably, such as Figures 1-3 As shown, the connector is a bolt 3, and a nut 4 is provided at the connecting hole 204. The connector passes through the mounting hole 101 and the connecting hole 204 and is inserted into the nut 4. Of course, to prevent loosening, an anti-loosening washer can be fitted at the bolt 3.

[0034] The first cutter head 201 and / or the second cutter head 202 are welded to the connecting bushing 203. Specifically, to ensure the rigidity of the cutter head and the connecting bushing 203, in this embodiment, both the first cutter head 201 and the second cutter head 202 are welded to the connecting bushing 203, reducing the number of connection points between the cutter head and the connecting bushing 203. This facilitates assembly and disassembly and prevents the cutter head from loosening. During manufacturing, a connecting bushing 203 of appropriate length can be selected, and the two cutter heads can be welded to their respective ends. In this way, cutter head assemblies 2 with different spacing can be designed according to connecting bushings 203 of different lengths to adapt to different working widths.

[0035] like Figure 4 , Figure 5 As shown, in one embodiment, the first cutter head 201 and / or the second cutter head 202 are provided with through holes 5 to avoid the connecting bushing 203. Specifically, in order to facilitate welding the cutter head to the connecting bushing 203 and increase the contact area between the two, this embodiment provides a through hole 5 at the center point of both the first cutter head 201 and the second cutter head 202. The through hole 5 is used to avoid the connecting bushing 203, so that the end of the connecting bushing 203 can pass through the through hole 5.

[0036] Furthermore, such as Figure 4 , Figure 5 As shown, the inner wall of the through hole 5 extends inward to form a limiting protrusion 6, and the connecting bushing 203 is provided with a matching limiting groove 7, so that the limiting protrusion 6 is engaged in the limiting groove 7. Specifically, in order to fix the cutter head at the corresponding position of the connecting bushing 203 and improve the structural strength of both, this embodiment provides a limiting protrusion 6 on the inner wall of the through hole 5. The limiting protrusion 6 is integrally formed with the first cutter head 201 or the second cutter head 202, and the end of the connecting bushing 203 is provided with a limiting groove 7. When the connecting bushing 203 passes through the hole 5 to the corresponding cutter head, the limiting protrusion 6 can be engaged in the limiting groove 7. During welding, this can restrict the rotation of the cutter head relative to the connecting bushing 203, and after welding, it can improve the stability of the cutter head and the connecting bushing 203.

[0037] Preferably, such as Figure 5 As shown, the limiting protrusion 6 has an arc-shaped structure, used to fit the inner wall of the through hole 5 and the limiting groove 7.

[0038] Preferably, such as Figure 5 As shown, when both the first cutter head 201 and the second cutter head 202 are provided with through holes 5, the two limiting protrusions 6 located at the two through holes 5 are staggered. That is, the two limiting grooves 7 located at both ends of the connecting bushing 203 are staggered (e.g., Figure 6 As shown in the figure, it is used to balance the stress of the connecting bushing 203 and avoid the formation of weak points under stress.

[0039] like Figures 1-5 As shown, in one embodiment, the first cutter head 201 and / or the second cutter head 202 have a plurality of blades 8 arranged in a circumferential array, and each blade 8 has a bent section 801 at its end. The two bent sections 801 of two adjacent blades 8 bend in opposite directions. This enables bidirectional tearing of the soil and allows the cutter head to form a self-cleaning cutter head, preventing weeds from entangled.

[0040] This embodiment also provides a mini tiller, including the blade structure for the mini tiller described above. The specific structure of the blade structure for the mini tiller is as described in the above embodiment. Since this mini tiller adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A blade structure for a micro-tiller, characterized in that, include: The spindle has multiple mounting points spaced apart; Multiple cutter head assemblies are provided at multiple mounting points, one for each of them, and include a first cutter head, a second cutter head, and a connecting bushing. The first cutter head and the second cutter head are arranged opposite each other at opposite ends of the connecting bushing, and the connecting bushing is configured to be detachably provided at the corresponding mounting point.

2. The blade structure for a micro-tiller as described in claim 1, characterized in that, The mounting point is a mounting hole formed on the spindle, the connecting shaft is fitted with a connecting hole, and the connector passes through the mounting hole and the connecting hole.

3. The blade structure for a micro-tiller as described in claim 2, characterized in that, The connector is a bolt, and a nut is provided at the connection hole. The connector passes through the mounting hole and the connection hole and is inserted into the nut.

4. The blade structure for a micro-tiller as described in any one of claims 1-3, characterized in that, The first cutter head and / or the second cutter head are welded to the connecting bushing.

5. The blade structure for a micro-tiller as described in any one of claims 1-3, characterized in that, The first cutter head and / or the second cutter head are provided with through holes to avoid the connecting bushing.

6. The blade structure for a micro-tiller as described in claim 5, characterized in that, The inner wall of the through hole extends inward to form a limiting protrusion, and the connecting shaft is sleeved with a matching limiting groove so that the limiting protrusion is engaged in the limiting groove.

7. The blade structure for a micro-tiller as described in claim 6, characterized in that, The limiting protrusion has an arc-shaped structure.

8. The blade structure for a micro-tiller as described in claim 6, characterized in that, When both the first cutter head and the second cutter head are provided with through holes, the two limiting protrusions provided at the two through holes are staggered.

9. The blade structure for a micro-tiller as described in claim 1, characterized in that, The first cutter head and / or the second cutter head have a plurality of blades arranged in a circumferential array, and the ends of the blades are formed with bent sections, the two bent sections of two adjacent blades being bent in opposite directions.

10. A micro-tiller, characterized in that, include: The blade structure for a micro-tiller as described in any one of claims 1-9.

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