Handheld rotary cultivator

Abstract

The utility model provides a handheld rotary cultivator. The handheld rotary cultivator comprises a machine shell, a transmission assembly, a transmission shaft, a handle, a housing and a driving motor. The transmission shaft transversely penetrates through the bottom of the machine shell and is rotationally connected with the machine shell, the transmission assembly is connected into the machine shell, the transmission shaft is in transmission connection with the output end of the transmission assembly, and the cutter head assemblies are fixed to the two ends of the transmission shaft. The housing is fixed at the lower end of the handle; the driving motor is fixed in the housing; the lower end of the housing is detachably connected with the upper end of the machine shell, a first transmission part is coaxially fixed to an output shaft of the driving motor, the input end of the transmission assembly is in transmission connection with a second transmission part, and the second transmission part is detachably in transmission connection with the first transmission part. According to the utility model, the housing and the housing can be split, so that the packaging volume of the handheld rotary cultivator can be reduced, namely, the packaging and transportation cost of the handheld rotary cultivator can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of soil tillage machinery technology, and more specifically, to a handheld rotary tiller. Background Technology

[0002] Handheld rotary tillers are devices used for cultivating soil. Currently, handheld rotary tillers on the market mainly consist of a housing, transmission components, a drive shaft, a handle, a cover, and a drive motor. The drive shaft runs horizontally through the bottom of the housing and is rotatably connected to the housing. The transmission components are connected inside the housing, and the output end of the transmission shaft is connected to the output shaft of the transmission components. Both ends of the transmission shaft are fixed with blade assemblies. The cover is fixed to the lower end of the handle, the drive motor is fixed inside the cover, and the cover is fixed to the upper end of the housing. The input end of the transmission components is connected to the output shaft of the drive motor. However, in the above-mentioned handheld rotary tiller structure, since the cover and the housing are fixed as one piece, and the housing and the blade assemblies both protrude horizontally from the cover and the handle, there is a disadvantage of large packaging volume for the handheld rotary tiller, which results in high packaging costs, high transportation costs, and inconvenient transportation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a handheld rotary tiller whose internal cover and machine shell can be separated, thereby reducing the packaging volume of the handheld rotary tiller and thus reducing the packaging and transportation costs of the handheld rotary tiller.

[0004] This utility model provides a handheld rotary tiller, including a housing, a transmission assembly, a transmission shaft, a handle, a cover, and a drive motor. The transmission shaft is horizontally inserted through the bottom of the housing and rotatably connected to the housing. The transmission assembly is connected inside the housing, and the output end of the transmission shaft is connected to the transmission assembly. Both ends of the transmission shaft are fixed with blade assemblies. The cover is fixed to the lower end of the handle, and the drive motor is fixed inside the cover. The lower end of the cover is detachably connected to the upper end of the housing. A first transmission component is coaxially fixed on the output shaft of the drive motor, and a second transmission component is connected to the input end of the transmission assembly. The second transmission component is detachably connected to the first transmission component.

[0005] By adopting the above-mentioned structure, this utility model allows the cover and the machine housing to be detachably connected. When packaging or transporting the handheld rotary tiller, the cover and the machine housing can be separated, and the machine housing and the blade assembly can be placed parallel to the cover and the handle. This reduces the packaging volume of the handheld rotary tiller, thereby reducing the packaging and transportation costs.

[0006] In one possible implementation, the upper end of the housing is provided with an annular boss, and the outer side wall of the boss is provided with a plurality of slots circumferentially. The lower end of the cover is fitted onto the outside of the boss, and the inner wall of the lower end of the cover is provided with locking blocks corresponding to the slots one by one. When the cover is fitted onto the boss and rotates relative to the housing, each locking block engages into the corresponding slot, thereby making the cover and the housing rotate and fasten together. A locking structure is also provided between the cover and the housing. When the cover and the housing are rotated and fastened together, the locking structure is used to lock the cover and the housing together. By adopting this structure, when the cover is fitted onto the boss and rotates relative to the housing, Afterwards, each locking block can be engaged into the corresponding slot. At this point, the cover can be rotated and connected to the housing. Simultaneously, under the action of the locking structure, the cover and the housing can be locked together, thus ensuring that the cover and the housing are reliably assembled. When the locking structure is released from the locking state of the cover and the housing, and the cover rotates in the opposite direction relative to the housing, so that each locking block disengages from its corresponding slot, the cover can be detached, thus achieving the separation of the cover and the housing. By adopting the above structure, the disassembly and assembly of the cover and the housing can be easily achieved.

[0007] In one possible implementation, a knob is vertically slidably connected to the front side of the housing. A spring is provided between the knob and the housing, and the spring is used to apply a thrust to the knob to drive it to slide upward relative to the housing. A rod is provided at the upper end of the knob, and a hole is provided at the bottom of the cover. When the cover and the housing are rotated and fastened, the rod engages with the hole to lock the cover and the housing. With this structure, after the cover and the housing are rotated and fastened, and when the knob is released, the knob can slide upward under the action of the spring. At this time, the rod can engage with the hole, thereby reliably locking the cover and the housing.

[0008] In one possible implementation, a limit switch is fixed inside the cover; the limit switch is connected in series between the drive motor and the main control switch of the handheld rotary tiller, and the limit switch is located above the socket; when the plug is inserted into the socket, the plug triggers the trigger end of the limit switch to make the limit switch conduct; by adopting the above structure, since the limit switch is connected in series between the drive motor and the main control switch of the handheld rotary tiller, and the plug can only trigger the trigger end of the limit switch to make the limit switch conduct after the cover and the machine housing are rotated and fastened, and the plug is inserted into the socket, that is, the handheld rotary tiller can only be started after the cover and the machine housing are assembled and locked by the locking structure, thus improving the safety of the handheld rotary tiller.

[0009] In one possible implementation, the lower end of the first transmission member is provided with a plurality of slots evenly distributed in a circumferential direction, and the upper end of the second transmission member is provided with a plug corresponding to each of the plurality of slots. Each plug engages with one of the slots to allow the second transmission member to be circumferentially positioned and connected to the first transmission member. With this structure, when the cover and the housing are assembled, each plug can engage with one of the slots to allow the second transmission member to be circumferentially positioned and connected to the first transmission member, thereby enabling the second transmission member and the first transmission member to be easily connected and having the advantage of easy disassembly of the second transmission member and the first transmission member.

[0010] In one possible implementation, the transmission assembly includes a gear shaft, a support shaft, a gear ring, a pinion, and a large gear. The gear shaft is vertically positioned and rotatably connected to the inner side of the housing via two first bearings. The support shaft is horizontally positioned inside the housing, with both ends rotatably connected to the housing via second bearings. The gear ring and pinion are coaxially sleeved on the support shaft and circumferentially limited by it. The large gear is coaxially sleeved on the transmission shaft and circumferentially limited by it. The upper end of the gear shaft has splined teeth, and the lower end of the second transmission component has a splined hole into which the splined teeth are inserted. The lower end of the gear shaft has a gear section that meshes with the gear ring, and the large gear meshes with the pinion. By adopting this structure, the splined teeth and splined hole... With the help of the plug-in connection, the gear shaft can be reliably connected to the second transmission component. When the second transmission component drives the gear shaft to rotate, the gear ring can rotate under the cooperation of the gear part and the gear ring. Since the pinion of the gear ring is coaxially sleeved on the support shaft and circumferentially limited by the support shaft, it can drive the pinion to rotate synchronously. Since the pinion meshes with the large gear, it can drive the large gear, the transmission shaft and the cutter head assembly to rotate. By using the above transmission component, the transmission component can reliably transmit the power of the drive motor to the transmission shaft and the cutter head assembly so that the cutter head assembly can rotate reliably. In addition, the above transmission component is a gear-type transmission component, which has the advantages of good power transmission effect and high reliability.

[0011] In one possible implementation, the transmission assembly further includes a limiting block clamped inside the housing. The limiting block has a limiting groove at its bottom, into which the outer edge of the gear ring is inserted, with both sides of the outer edge of the gear ring abutting against the inner walls of the limiting groove. A through hole communicating with the limiting groove is vertically provided on the limiting block, into which the lower end of the gear shaft is inserted, with the outer wall of the gear abutting against the wall of the through hole. With this structure, under the action of the limiting groove, the outer edges of the gear ring abutting against the inner walls of the limiting groove, thus achieving axial limiting of the gear ring. Furthermore, the outer wall of the gear abutting against the wall of the through hole, thus achieving radial limiting of the gear abutting. In other words, this structure ensures reliable meshing between the gear abutting and the gear ring, enabling reliable power transmission and preventing slippage between the gear abutting and the gear ring. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a partially exploded three-dimensional structural diagram of the present invention;

[0014] Figure 3 This is a three-dimensional structural diagram of the casing and handle after they are connected.

[0015] Figure 4 This is a three-dimensional structural diagram of the present invention after removing part of the cover and housing;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the second transmission component after it has been separated from the transmission assembly. Detailed Implementation

[0017] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] See Figure 1-5 As shown in the figure, this application discloses a handheld rotary tiller, including a housing 1, a transmission assembly, a transmission shaft 2, a handle 3, a cover 4, and a drive motor 5; the transmission shaft 2 is transversely inserted through the bottom of the housing 1 and rotatably connected to the housing 1, the transmission assembly is connected inside the housing 1, the transmission shaft 2 is connected to the output end of the transmission assembly, and both ends of the transmission shaft 2 are fixed with blade assemblies 6; the cover 4 is fixed to the lower end of the handle 3, and the drive motor 5 is fixed inside the cover 4; the lower end of the cover 4 is detachably connected to the upper end of the housing 1, a first transmission component 7 is coaxially fixed on the output shaft of the drive motor 5, a second transmission component 8 is connected to the input end of the transmission assembly, and the second transmission component 8 is detachably connected to the first transmission component 7.

[0022] The upper end of the housing 1 is provided with an annular boss 11. Several slots 111 are circumferentially arranged on the outer wall of the boss 11. The lower end of the cover 4 is fitted onto the outside of the boss 11. The inner wall of the lower end of the cover 4 is provided with locking blocks 41 corresponding to the slots 111. When the cover 4 is fitted onto the boss 11 and rotates relative to the housing 1, each locking block 41 engages with the corresponding slot 111, causing the cover 4 to rotate and engage with the housing 1. A locking structure is also provided between the cover 4 and the housing 1. When the cover 4 and the housing 1 are rotated and engaged, the locking structure locks the cover 4 and the housing 1. By adopting this structure, the cover and... After the boss is fitted and rotated relative to the housing, each locking block can be engaged into the corresponding slot. At this time, the cover can be rotated and connected to the housing. At the same time, the locking structure can lock the cover and the housing, thus ensuring that the cover and the housing are reliably assembled together. When the locking structure is released from the locking state of the cover and the housing, and the cover rotates in the opposite direction relative to the housing, so that each locking block disengages from the corresponding slot, the cover can be disassembled, thus realizing the separation of the cover and the housing. By adopting the above structure, the disassembly and assembly of the cover and the housing can be easily realized.

[0023] A knob 9 is vertically slidably connected to the front side of the housing 1. A spring is provided between the knob 9 and the housing 1. The spring is used to apply a thrust to the knob 9 to drive it to slide upward relative to the housing 1. A rod 91 is provided at the upper end of the knob 9, and a hole 42 is provided at the bottom of the cover 4. When the cover 4 and the housing 1 are rotated and fastened, the rod 91 and the hole 42 are engaged to lock the cover 4 and the housing 1. With this structure, after the cover and the housing are rotated and fastened, and when the knob is released, the knob can slide upward under the action of the spring. At this time, the rod can engage with the hole, thereby reliably locking the cover and the housing.

[0024] A limit switch 10 is fixed inside the cover 4; the limit switch 10 is connected in series between the drive motor 5 and the main control switch of the handheld rotary tiller, and the limit switch 10 is located above the socket 42; when the insertion rod 91 is inserted into the socket 42, the insertion rod 91 is used to trigger the trigger end of the limit switch 10 to make the limit switch 10 conduct; by adopting the above structure, since the limit switch is connected in series between the drive motor and the main control switch of the handheld rotary tiller, and the insertion rod can only trigger the trigger end of the limit switch to make the limit switch conduct after the cover and the machine body are rotated and fastened, and the insertion rod is inserted into the socket, that is, the handheld rotary tiller can only be started after the cover and the machine body are assembled and locked by the locking structure, which improves the safety of the handheld rotary tiller.

[0025] The lower end of the first transmission component 7 is provided with a plurality of slots 71 evenly distributed in a circumferential direction. The upper end of the second transmission component 8 is provided with inserts 81 corresponding to the plurality of slots 71 one by one. Each insert 81 is engaged with one of the slots 71 to enable the second transmission component 8 to be circumferentially limited and connected to the first transmission component 7. With this structure, when the cover and the housing are assembled, each insert can be engaged with one of the slots to enable the second transmission component to be circumferentially limited and connected to the first transmission component, thereby enabling the second transmission component and the first transmission component to be easily connected and having the advantage of easy disassembly of the second transmission component and the first transmission component.

[0026] The transmission assembly includes a gear shaft 20, a support shaft 30, a gear ring 40, a pinion 50, and a large gear 60. The gear shaft 20 is vertically arranged and rotatably connected to the inner side of the housing 1 via two first bearings 201. The support shaft 30 is horizontally arranged inside the housing 1, and both ends of the support shaft 30 are rotatably connected to the housing 1 via second bearings 301. The gear ring 40 and the pinion 50 are coaxially sleeved on the support shaft 30 and circumferentially limited by the support shaft 30. The large gear 60 is coaxially sleeved on the transmission shaft 2 and circumferentially limited by the transmission shaft 2. The upper end of the gear shaft 20 is provided with spline teeth 202, and the lower end of the second transmission component 8 is provided with a spline hole 82 into which the spline teeth 202 are inserted. The lower end of the gear shaft 20 is provided with a gear section 203, which meshes with the gear ring 40. The large gear 60 meshes with the pinion 50. Gear 50 meshes; with this structure, the gear shaft can be reliably connected to the second transmission component through the interlocking action of the spline teeth and spline holes; when the second transmission component drives the gear shaft to rotate, the gear ring can rotate under the action of the gear part and the gear ring. Since the pinion of the gear ring is coaxially sleeved on the support shaft and circumferentially limited by the support shaft, it can drive the pinion to rotate synchronously. Since the pinion meshes with the large gear, it can drive the large gear, the transmission shaft and the cutter head assembly to rotate; with the above transmission component, the transmission component can reliably transmit the power of the drive motor to the transmission shaft and the cutter head assembly so that the cutter head assembly can rotate reliably; in addition, the above transmission component is a gear-type transmission component, which has the advantages of good power transmission effect and high reliability.

[0027] The transmission assembly also includes a limiting block 70, which is clamped inside the housing 1. A limiting groove 701 is provided at the bottom of the limiting block 70, and the outer edge of the gear ring 40 is inserted into the limiting groove 701. The two sides of the outer edge of the gear ring 40 are respectively in contact with the inner walls of the two sides of the limiting groove 701. A through hole 702 communicating with the limiting groove 701 is vertically provided on the limiting block 70, and the lower end of the gear shaft 20 is inserted into the through hole 702. The outer wall of the gear portion 203 is in contact with the through hole 702. The holes are fitted together; with this structure, under the action of the limiting groove, the two sides of the outer edge of the gear ring are fitted together with the inner walls of the two sides of the limiting groove, thereby achieving axial limiting of the gear ring. And because the outer wall of the gear part is fitted together with the hole wall of the through hole, the radial limiting of the gear part is achieved. That is, with the above structure, the gear part can reliably mesh with the gear ring and achieve reliable power transmission, so as to avoid slippage between the gear part and the gear ring.

[0028] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A handheld rotary tiller, comprising a housing (1), a transmission assembly, a transmission shaft (2), a handle (3), a cover (4), and a drive motor (5); the transmission shaft (2) is transversely inserted through the bottom of the housing (1) and rotatably connected to the housing (1); the transmission assembly is connected inside the housing (1); the transmission shaft (2) is connected to the output end of the transmission assembly; and blade disc assemblies (6) are fixed at both ends of the transmission shaft (2); the cover (4) is fixed to the lower end of the handle (3); and the drive motor (5) is fixed inside the cover (4); characterized in that: The lower end of the cover (4) is detachably connected to the upper end of the housing (1). A first transmission component (7) is coaxially fixed on the output shaft of the drive motor (5). A second transmission component (8) is connected to the input end of the transmission component. The second transmission component (8) is detachably connected to the first transmission component (7).

2. The hand-held rotary cultivator of claim 1, characterized in that: The upper end of the housing (1) is provided with a ring-shaped boss (11). The outer side wall of the boss (11) is provided with a plurality of slots (111) in a circumferential direction. The lower end of the cover (4) is sleeved on the outside of the boss (11). The inner wall of the lower end of the cover (4) is provided with a locking block (41) corresponding to the plurality of slots (111). When the cover (4) is sleeved with the boss (11) and rotates relative to the housing (1), each locking block (41) is inserted into the corresponding slot (111) so that the cover (4) and the housing (1) are rotated and fastened. A locking structure is also provided between the cover (4) and the housing (1). When the cover (4) and the housing (1) are rotated and fastened, the locking structure is used to lock the cover (4) and the housing (1).

3. The walk-behind rotary cultivator of claim 2, characterized in that: A knob (9) is vertically slidably connected to the front side of the housing (1). A spring is provided between the knob (9) and the housing (1). The spring is used to apply a thrust to the knob (9) to drive the knob (9) to slide upward relative to the housing (1). A plug rod (91) is provided at the upper end of the knob (9). A socket (42) is provided at the bottom of the cover (4). When the cover (4) and the housing (1) are rotated and fastened, the plug rod (91) and the socket (42) are engaged to lock the cover (4) and the housing (1).

4. The walk-behind rotary cultivator of claim 3, characterized in that: A limit switch (10) is fixed inside the cover (4); the limit switch (10) is connected in series between the drive motor (5) and the main control switch of the handheld rotary tiller, and the limit switch (10) is located above the socket (42); when the plug rod (91) is inserted into the socket (42), the plug rod (91) is used to trigger the trigger end of the limit switch (10) to make the limit switch (10) conduct.

5. The hand-held rotary cultivator of any one of claims 1-4, characterized in that: The lower end of the first transmission member (7) is provided with a plurality of slots (71) evenly distributed in the circumferential direction. The upper end of the second transmission member (8) is provided with a plug (81) corresponding to the plurality of slots (71). Each plug (81) is engaged with one of the slots (71) to enable the second transmission member (8) to be circumferentially limited and connected to the first transmission member (7).

6. The walk-behind cultivator of claim 5, characterized in that: The transmission assembly includes a gear shaft (20), a support shaft (30), a gear ring (40), a pinion (50), and a large gear (60). The gear shaft (20) is vertically arranged and rotatably connected to the inner side of the housing (1) via two first bearings (201). The support shaft (30) is horizontally arranged on the inner side of the housing (1). Both ends of the support shaft (30) are rotatably connected to the housing (1) via second bearings (301). The gear ring (40) and the pinion (50) are coaxially sleeved on the support shaft (30) and connected to the support shaft (60). The support shaft (30) is circumferentially limited, and the large gear (60) is coaxially sleeved on the transmission shaft (2) and circumferentially limited by the transmission shaft (2); the upper end of the gear shaft (20) is provided with a spline tooth (202), the lower end of the second transmission member (8) is provided with a spline hole (82), the spline tooth (202) is inserted into the spline hole (82), the lower end of the gear shaft (20) is provided with a gear part (203), the gear part (203) meshes with the gear ring (40), and the large gear (60) meshes with the small gear (50).

7. The walk-behind cultivator of claim 6, characterized in that: The transmission assembly also includes a limiting block (70), which is clamped inside the housing (1); the bottom of the limiting block (70) is provided with a limiting groove (701), the outer edge of the gear ring (40) is inserted into the limiting groove (701), and the two sides of the outer edge of the gear ring (40) are respectively attached to the inner walls of the two sides of the limiting groove (701); the limiting block (70) is vertically provided with a through hole (702) communicating with the limiting groove (701), the lower end of the gear shaft (20) is inserted into the through hole (702), and the outer side wall of the gear part (203) is attached to the hole wall of the through hole (702).

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