CN216951526U

CN216951526U - Multifunctional gearbox for mini-tiller

Info

Publication number: CN216951526U
Application number: CN202122943030.4U
Authority: CN
Inventors: 崔丽慧; 韩益田
Original assignee: Chongqing Zhuoge Haosi Machinery Co ltd
Current assignee: Chongqing Zhuoge Haosi Machinery Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-07-12
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a multifunctional gearbox for a mini-tiller, which is provided with a box body, wherein transmission shafts at all stages are arranged in the box body, gears are arranged on the transmission shafts, the gears at all stages are matched with each other, a gear mechanism and an adjusting mechanism are also arranged in the box body, and a first direction adjusting device and a second direction adjusting device are also arranged in the box body.

Description

Multifunctional gearbox for mini-tiller

Technical Field

The utility model relates to the technical field of mini-tillers, in particular to a multifunctional gearbox for a mini-tillers.

Background

The mini-tiller is a very necessary machine in modern agriculture, and the use of the mini-tiller changes the lagging state of the traditional hoe for digging the ground and tilling the cattle, and saves great manpower and material resources. However, the existing micro-tillage machine has some defects;

in the prior art, the gear shifting speed change mechanism of the mini-tiller generally has the defects of complex structure, long power transmission line, low power transmission reliability, inconvenient gear shifting operation, poor flexibility, low stability and the like, can not normally operate for a long time under the conditions of severe working environment and poor lubricating condition, and can not meet the requirement of agricultural production.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multifunctional gearbox for a mini-tiller, and aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a multifunctional gearbox for a mini-tiller is provided with a box body, a first rotating shaft is arranged in the box body, a gear A is arranged on the first rotating shaft, a rotatable gear shaft sleeve A is further arranged on the first rotating shaft, a gear B, a gear C, a gear D and a gear E are sequentially arranged on the gear shaft sleeve A, a second rotating shaft is arranged in the box body, a gear G is arranged on the second rotating shaft and matched with the gear A, an adjusting shaft sleeve A is further arranged on the second rotating shaft in a sliding mode, an adjusting groove A and a gear H are arranged on the adjusting shaft sleeve A, the gear H can be matched with the gear B, a stop lever is arranged on the upper portion of the box body and sleeved with an adjusting device A, one end of the adjusting device A is arranged in the adjusting groove A and matched with the adjusting groove A, and a third rotating shaft is arranged in the box body, the third rotating shaft is provided with a gear I, the gear I is matched with the gear A, the third rotating shaft is also provided with an adjusting shaft sleeve B in a sliding manner, the adjusting shaft sleeve B is provided with an adjusting groove B and a gear J, the box body is internally provided with an adjusting device B, the adjusting device B is matched with the adjusting groove B, the box body is internally provided with a fourth rotating shaft, the fourth rotating shaft is provided with a gear K and a gear L, the gear K is matched with the gear J, the box body is internally further provided with a fifth rotating shaft, the fifth rotating shaft is provided with a gear M, the gear M is matched with the gear L, the gear M can also be matched with the gear J, the fifth rotating shaft is further provided with a sprocket A, the sprocket A is sleeved with one end of a chain, the other end of the chain is sleeved on the sprocket B, and the sprocket B is sleeved on the working shaft, a sixth rotating shaft is arranged in the box body, a shaft sleeve D, a gear N, a shaft sleeve E and a gear O are sequentially arranged on the sixth rotating shaft, the shaft sleeve D and the shaft sleeve E are uniformly and rotatably connected with the sixth rotating shaft, a gear P and a gear Q are arranged on the shaft sleeve D, the gear P is matched with the gear C, the gear Q can be matched with the gear H, a gear R and a gear S are arranged on the shaft sleeve E, the gear R can be matched with the gear H, the gear S is matched with the gear D, the gear O is matched with the gear E, the gear O can also be matched with the gear H, a seventh rotating shaft is further arranged in the box body, a gear T is arranged on the seventh rotating shaft, the gear T is matched with the gear N, and a first direction adjusting device and a second direction adjusting device are further arranged on two sides of the gear T respectively, the first direction adjusting device and the second direction adjusting device are further connected with the traveling shaft through chains respectively.

Preferably, adjusting device A includes first pivot pole, the vertical wearing to establish of first pivot pole the box top, first pivot pole top is articulated with adjustment handle one end, first pivot pole bottom is articulated with first regulating plate one end, the first regulating plate other end is articulated with the alignment jig, the alignment jig cover is established on the stop lever, evenly be equipped with the spacing groove on the stop lever, still be equipped with the solid fixed cylinder on the alignment jig, the solid fixed cylinder top is closed, be equipped with connecting spring in the solid fixed cylinder, the connecting spring bottom is equipped with spacing ball, spacing ball with the spacing groove cooperation, alignment jig one end sets up in the adjustment groove A.

Preferably, the first direction adjusting device includes a limiting block, the limiting block is located at the end of the seventh rotating shaft, the inner end of the limiting block is connected with one end of a return spring, the other end of the return spring is connected with the side surface of the direction adjusting ring, the return spring is sleeved on the seventh rotating shaft, the direction adjusting ring is slidably connected with the seventh rotating shaft, an adjusting groove D is arranged on the outer ring of the direction adjusting ring, transversely-arranged connecting grooves are uniformly arranged on the seventh rotating shaft, the direction adjusting ring corresponds to the connecting grooves in position, adjusting balls are arranged in the connecting grooves, a gear shaft sleeve G is further arranged on the seventh rotating shaft, one end of the gear shaft sleeve G corresponds to the connecting grooves, the end of the gear shaft sleeve G is located between the direction adjusting ring and the seventh rotating shaft, a limiting hole is arranged on the end of the gear shaft sleeve G, the adjusting ball is further arranged in the limiting hole, the accent is kept away from to the ring inner wall return spring one end is equipped with the accent that the slope set up to the groove, still be equipped with sprocket C on the gear shaft sleeve G, sprocket C passes through chain and sprocket D cooperation, sprocket D sets up on the walking shaft, still wear to be equipped with the second dwang on the box, the regulation handle is connected to second dwang outer end, second dwang inner is articulated with second regulating plate one end, the second regulating plate other end is connected with regulation post one end, the regulation post other end sets up in the adjustment tank D, the second accent to the device with first accent is unanimous to the device structure.

Preferably, the traveling shaft comprises a left shaft and a right shaft, the left shaft is arranged on one side in the box body, the right shaft is arranged on the other side in the box body, the sprocket D is arranged on the left shaft, the right shaft is provided with a sprocket E, and the sprocket E is matched with the second direction adjusting device through a chain.

Compared with the prior art, the utility model has the beneficial effects that: the multi-gear speed-changing device has multiple gears, can realize multi-level speed change, has higher practicability, can realize manual differential by adjusting the first direction-changing device and the second direction-changing device, is convenient to turn, can normally work in various complex work sites and environments, can realize walking speed change by adjusting the gear lever, has more gears, is more flexible in speed control of the mini-tiller, and has stronger selectivity in different environments.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an internal front view of the present invention;

FIG. 3 is a schematic internal rear view of the present invention;

FIG. 4 is a rear view of the present invention;

FIG. 5 is an enlarged schematic view of FIG. 4-A of the present invention;

fig. 6 is a sectional view of a seventh rotary shaft of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, a welded connection, a direct connection, a connection through an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1: a multifunctional gearbox for a mini-tiller is provided with a box body 1, as shown in figure 2: a first rotating shaft 2 is arranged in the box body 1, a gear A3 is arranged on the first rotating shaft 2, a gear shaft sleeve A4 is further rotatably arranged on the first rotating shaft 2, a gear B5, a gear C6, a gear D7 and a gear E8 are sequentially arranged on the gear shaft sleeve A4, a second rotating shaft 9 is arranged in the box body 1, a gear G10 is arranged on the second rotating shaft 9, the gear G10 is matched with the gear A3, an adjusting shaft sleeve A11 is further slidably arranged on the second rotating shaft 9, an adjusting groove A12 and a gear H13 are arranged on the adjusting shaft sleeve A11, the gear H13 is matched with the gear B5, a gear lever 14 is arranged at the upper part of the box body 1, an adjusting device A15 is sleeved on the gear lever 14, one end of the adjusting device A15 is arranged in the adjusting groove A12, the adjusting device A15 is matched with the adjusting groove A12, and the adjusting device A15 comprises a first rotating rod 45, the vertical dress of wearing to establish of first pivot pole 45 box 1 top, first pivot pole 45 top is articulated with adjustment handle one end, first pivot pole 45 bottom is articulated with first regulating plate 46 one end, the first regulating plate 46 other end is articulated with alignment jig 47, alignment jig 47 cover is established on the fender position pole 14, evenly be equipped with seven spacing grooves 48 on the fender position pole 14, still be equipped with solid fixed cylinder 49 on the alignment jig 47, gu fixed cylinder 49 top is closed, be equipped with connecting spring in the solid fixed cylinder 49, the connecting spring bottom is equipped with spacing ball, spacing ball with spacing groove 48 cooperates, alignment jig 47 one end sets up in adjustment groove A12, be equipped with third axis of rotation 16 in the box 1, be equipped with gear I17 in the third axis of rotation 16, gear I17 with gear A3 cooperates, still slide on the third axis of rotation 16 and be equipped with regulation axle sleeve B18, adjusting shaft sleeve B18 is provided with adjusting groove B19 and gear J20, still be equipped with adjusting device B21 in the box 1, adjusting device B21 with adjusting groove B19 cooperates, be equipped with fourth axis of rotation 22 in the box 1, be equipped with gear K24 and gear L25 on the fourth axis of rotation 22, gear K24 with gear J20 cooperates, still be equipped with fifth axis of rotation 26 in the box 1, be equipped with gear M27 on the fifth axis of rotation 26, gear M27 with gear L25 cooperates, just gear M27 can also with gear J20 cooperates, still be equipped with sprocket a28 on the fifth axis of rotation 26, the cover is equipped with chain one end on sprocket a28, the chain other end cover is established on sprocket B29, sprocket B29 cover is established on working shaft 30, as shown in fig. 3 and fig. 4: a sixth rotating shaft 31 is arranged in the box body 1, a shaft sleeve D32, a gear N33, a shaft sleeve E34 and a gear O35 are sequentially arranged on the sixth rotating shaft 31, the sleeve D32 and the sleeve E34 are rotatably coupled to the sixth rotating shaft 31, the shaft sleeve D32 is provided with a gear P36 and a gear Q37, the gear P36 is matched with the gear C6, the gear Q37 can be matched with the gear H13, the sleeve E34 is provided with a gear R38 and a gear S39, the gear R38 can be mated with the gear H13, the gear S39 is mated with the gear D7, the gear O35 is matched with the gear E8, a seventh rotating shaft 40 is arranged in the box body 1, the seventh rotating shaft 40 is provided with a gear T41, the gear T41 is matched with the gear N33, a first direction adjusting device 42 and a second direction adjusting device 43 are further respectively arranged on two sides of the gear T41, as shown in fig. 5 and 6: the first direction adjusting device 42 and the second direction adjusting device 43 are further connected with the traveling shaft 44 through chains respectively, the first direction adjusting device 42 comprises a limiting block 50, the limiting block 50 is located at the end of the seventh rotating shaft 40, the inner end of the limiting block 50 is connected with one end of a return spring 51, the other end of the return spring 51 is connected with the side surface of the direction adjusting ring 52, the return spring 51 is sleeved on the seventh rotating shaft 40, the direction adjusting ring 52 is slidably connected with the seventh rotating shaft 40, an adjusting groove D53 is formed in the outer ring of the direction adjusting ring 52, a connecting groove 55 transversely arranged is uniformly formed in the seventh rotating shaft 40, the direction adjusting ring 52 corresponds to the connecting groove 55 in position, an adjusting ball 54 is arranged in the connecting groove 55, a gear shaft sleeve G61 is further arranged on the seventh rotating shaft 40, and a gear shaft sleeve G61 is sleeved on the seventh rotating shaft 40, the end of the gear shaft sleeve G61 corresponds to the connecting groove 55 without rotating along with the seventh rotating shaft 40, the end of the gear shaft sleeve G61 is located between the direction-adjusting ring 52 and the seventh rotating shaft 40, and the end of the gear shaft sleeve G61 is provided with a limit hole 62, the adjusting ball 54 is further arranged in the limit hole 62, one end of the inner wall of the direction-adjusting ring 52, which is far away from the return spring 51, is provided with a direction-adjusting groove 63 which is obliquely arranged, the gear shaft sleeve G61 is further provided with a sprocket C56, the sprocket C56 is matched with the sprocket D57 through a chain, the sprocket D57 is arranged on the walking shaft 44, the box body 1 is further provided with a second rotating rod 58 in a penetrating manner, the outer end of the second rotating rod 58 is connected with an adjusting handle, the inner end of the second rotating rod 58 is hinged with one end of a second adjusting plate 59, the other end of the second adjusting plate 59 is connected with one end of an adjusting column 60, the other end of the adjusting column 60 is arranged in the adjusting groove D53, the second direction adjusting device 43 is consistent with the first direction adjusting device 42 in structure, the traveling shaft 44 includes a left shaft 441 and a right shaft 442, the left shaft 441 is disposed on one side in the box body 1, the right shaft 442 is disposed on the other side in the box body 1, the sprocket D57 is disposed on the left shaft 441, the right shaft 442 is disposed with a sprocket E443, the sprocket E443 is engaged with the second direction adjusting device 43 through a chain, when steering is required, the second rotating rod 58 is adjusted to move the direction adjusting ring 52 toward the limiting block 50, because of high-speed rotation, the adjusting ball 54 gradually disengages from the adjusting ball through the obliquely disposed direction adjusting groove 63 and the connecting groove 55 to no longer drive the gear shaft sleeve 61 to rotate, when reverse steering is required, the second direction adjusting device 43 is adjusted, and the principle is the same.

The working principle is as follows:

when the working state of the working mechanism positively rotates: the driving device drives the first rotating shaft 2 to rotate, the first rotating shaft 2 drives the gear A3 to rotate, the gear A3 drives the gear I17 to rotate, the gear I17 drives the third rotating shaft 16 to rotate, the third rotating shaft 16 drives the adjusting shaft sleeve B18 to rotate, the adjusting shaft sleeve B18 drives the gear J20 to rotate, the adjusting device B21 is pulled, the gear J20 is matched with the gear M27, the gear M27 is driven to rotate, the gear M27 drives the fifth rotating shaft 26 to rotate, the sprocket A28 of the fifth rotating shaft 26 rotates, the sprocket A28 drives the sprocket B29 to rotate, the sprocket B29 drives the working shaft 30, and the forward rotation of the working mechanism is realized.

When the working mechanism working state is reversed: the driving device drives the first rotating shaft 2 to rotate, the first rotating shaft 2 drives the gear A3 to rotate, the gear A3 drives the gear I17 to rotate, the gear I17 drives the third rotating shaft 16 to rotate, the third rotating shaft 16 drives the adjusting shaft sleeve B18 to rotate, the adjusting shaft sleeve B18 drives the gear J20 to rotate, the adjusting device B21 is shifted, the gear J20 is matched with the gear K24 to drive the gear K24, the gear K24 drives the gear L25, the gear L25 drives the gear M27 to rotate, the gear M27 drives the fifth rotating shaft 26 to rotate, the sprocket A28 of the fifth rotating shaft 26 rotates, the sprocket A28 drives the sprocket B29 to rotate, the sprocket B29 drives the working shaft 30, and the reverse rotation of the working mechanism is achieved.

When the operating mechanism is in a walking state and is in reverse gear: drive arrangement drives first axis of rotation 2 and rotates, first axis of rotation 2 drives gear A3 and rotates, gear A3 drives gear G10 and rotates, gear G10 drives second axis of rotation 9 and rotates, second axis of rotation 9 drives and adjusts axle sleeve A11 and rotates, it drives gear H13 and rotates to adjust axle sleeve A11, stir adjusting device A15, let gear H13 drive gear B5 and rotate, gear B5 drives gear axle sleeve A4 and rotates, gear axle sleeve A4 drives gear E8 and rotates, gear E8 drives gear O35 and rotates, gear O35 drives gear N33 and rotates, gear N33 drives gear T41 and rotates, when turning left: the gear T41 drives the sprocket C56 to rotate, the sprocket C56 drives the sprocket D57 to rotate through a chain, and the sprocket D57 drives the left shaft 441 to rotate; when turning to the right: the gear T41 drives the second adjusting device 42, the second adjusting device 42 drives the sprocket E443 to rotate, and the sprocket E443 drives the right shaft 442 to rotate, so that the traveling function reverse gear is realized.

When the operation mechanism is in a walking and advancing state: the driving device drives the first rotating shaft 2 to rotate, the first rotating shaft 2 drives the gear A to rotate, the gear A drives the gear G to rotate, the gear G drives the second rotating shaft 9 to rotate, the second rotating shaft 9 drives the adjusting shaft sleeve A to rotate, the adjusting shaft sleeve A drives the gear H to rotate, the adjusting device A is stirred to respectively match the gear H with (the gear Q, the gear R and the gear O), (the gear 37 drives the gear P, the gear P drives the gear C, the gear C drives the gear shaft sleeve A to rotate, the gear shaft sleeve A drives the gear E to rotate, the gear E drives the gear O to rotate, the gear O drives the gear N to rotate), (the gear R drives the gear S, the gear S drives the gear D, the gear D drives the gear shaft sleeve A to rotate, the gear shaft sleeve A drives the gear E to rotate, the gear E drives the gear O to rotate, the gear O drives the gear N to rotate, and (the gear O directly drives the gear N to rotate), the gear N33 drives the gear T41 to rotate, and when the gear N33 rotates to the right: the gear T41 drives the sprocket C56 to rotate, the sprocket C56 drives the sprocket D57 to rotate through a chain, and the sprocket D57 drives the left shaft 441 to rotate; when turning left: the gear T41 drives the second adjusting device 42, the second adjusting device 42 drives the sprocket E443 to rotate, and the sprocket E443 drives the right shaft 442 to rotate, so that the traveling function reverse gear is realized.

Claims

1. The utility model provides a plough quick-witted multi-functional gearbox a little for, its characterized in that: is provided with a box body (1), a first rotating shaft (2) is arranged in the box body (1), a gear A (3) is arranged on the first rotating shaft (2), a rotatable gear shaft sleeve A (4) is further arranged on the first rotating shaft (2), a gear B (5), a gear C (6), a gear D (7) and a gear E (8) are sequentially arranged on the gear shaft sleeve A (4), a second rotating shaft (9) is arranged in the box body (1), a gear G (10) is arranged on the second rotating shaft (9), the gear G (10) is matched with the gear A (3), an adjusting shaft sleeve A (11) is further arranged on the second rotating shaft (9) in a sliding manner, an adjusting groove A (12) and a gear H (13) are arranged on the adjusting shaft sleeve A (11), the gear H (13) can be matched with the gear B (5), a stop lever (14) is arranged on the upper portion of the box body (1), the gear shifting mechanism is characterized in that an adjusting device A (15) is sleeved on the gear lever (14), one end of the adjusting device A (15) is arranged in the adjusting groove A (12), the adjusting device A (15) is matched with the adjusting groove A (12), a third rotating shaft (16) is arranged in the box body (1), a gear I (17) is arranged on the third rotating shaft (16), the gear I (17) is matched with the gear A (3), an adjusting shaft sleeve B (18) is further arranged on the third rotating shaft (16) in a sliding mode, an adjusting groove B (19) and a gear J (20) are arranged on the adjusting shaft sleeve B (18), an adjusting device B (21) is further arranged in the box body (1), the adjusting device B (21) is matched with the adjusting groove B (19), a fourth rotating shaft (22) is arranged in the box body (1), a gear K (24) and a gear L (25) are arranged on the fourth rotating shaft (22), gear K (24) with gear J (20) cooperation, still be equipped with fifth axis of rotation (26) in box (1), be equipped with gear M (27) on fifth axis of rotation (26), gear M (27) with gear L (25) cooperation, just gear M (27) can also with gear J (20) cooperation, still be equipped with sprocket A (28) on fifth axis of rotation (26), the cover is equipped with chain one end on sprocket A (28), the other pot head of chain is established on sprocket B (29), sprocket B (29) cover is established on working shaft (30), be equipped with sixth axis of rotation (31) in box (1), be equipped with axle sleeve D (32), gear N (33) on sixth axis of rotation (31) in proper order, axle sleeve E (34) and gear O (35), axle sleeve D (32) with axle sleeve E (34) are even sixth axis of rotation (31) rotatable coupling, the gear box is characterized in that a gear P (36) and a gear Q (37) are arranged on the shaft sleeve D (32), the gear P (36) is matched with the gear C (6), the gear Q (37) can be matched with the gear H (13), a gear R (38) and a gear S (39) are arranged on the shaft sleeve E (34), the gear R (38) can be matched with the gear H (13), the gear S (39) is matched with the gear D (7), the gear O (35) is matched with the gear E (8), the gear O (35) can be matched with the gear H (13), a seventh rotating shaft (40) is further arranged in the box body (1), a gear T (41) is arranged on the seventh rotating shaft (40), the gear T (41) is matched with the gear N (33), a first direction adjusting device (42) and a second direction adjusting device (43) are further arranged on two sides of the gear T (41) respectively, the first direction adjusting device (42) and the second direction adjusting device (43) are further connected with a traveling shaft (44) through chains respectively, and the traveling shaft (44) is arranged in the box body (1).

2. The multifunctional gearbox for the mini-tiller according to claim 1, characterized in that: the adjusting device A (15) comprises a first rotating rod (45), the first rotating rod (45) vertically penetrates through the top of the box body (1), the top of the first rotating rod (45) is hinged with one end of the adjusting handle, the bottom of the first rotating rod (45) is hinged with one end of the first adjusting plate (46), the other end of the first adjusting plate (46) is hinged with an adjusting frame (47), the adjusting frame (47) is sleeved on the gear lever (14), the gear lever (14) is uniformly provided with a limit groove (48), the adjusting bracket (47) is also provided with a fixed cylinder (49), the top of the fixed cylinder (49) is closed, a connecting spring is arranged in the fixed cylinder (49), the bottom of the connecting spring is provided with a limiting ball which is matched with the limiting groove (48), one end of the adjusting frame (47) is arranged in the adjusting groove A (12).

3. The multifunctional gearbox for the mini-tiller according to claim 1, characterized in that: the first direction adjusting device (42) comprises a limiting block (50), the limiting block (50) is located at the end of the seventh rotating shaft (40), the inner end of the limiting block (50) is connected with one end of a return spring (51), the other end of the return spring (51) is connected with the side face of a direction adjusting ring (52), the return spring (51) is sleeved on the seventh rotating shaft (40), the direction adjusting ring (52) is in slidable connection with the seventh rotating shaft (40), an adjusting groove D (53) is formed in the outer ring of the direction adjusting ring (52), a connecting groove (55) transversely arranged is uniformly formed in the seventh rotating shaft (40), the direction adjusting ring (52) corresponds to the connecting groove (55), an adjusting ball (54) is arranged in the connecting groove (55), a gear shaft sleeve G (61) is further arranged on the seventh rotating shaft (40), one end of the gear shaft sleeve G (61) corresponds to the connecting groove (55), the end of the gear shaft sleeve G (61) is positioned between the direction adjusting ring (52) and the seventh rotating shaft (40), a limiting hole (62) is formed in the end of the gear shaft sleeve G (61), the adjusting ball (54) is further arranged in the limiting hole (62), one end of the return spring (51) far away from the inner wall of the direction adjusting ring (52) is provided with a direction adjusting groove (63) which is obliquely arranged, the gear shaft sleeve G (61) is further provided with a sprocket C (56), the sprocket C (56) is matched with a sprocket D (57) through a chain, the sprocket D (57) is arranged on the traveling shaft (44), a second rotating rod (58) is further arranged on the box body (1) in a penetrating manner, the outer end of the second rotating rod (58) is connected with an adjusting handle, the inner end of the second rotating rod (58) is hinged to one end of a second adjusting plate (59), and the other end of the second adjusting plate (59) is connected with one end of an adjusting column (60), the other end of the adjusting column (60) is arranged in the adjusting groove D (53), and the second direction adjusting device (43) is consistent with the first direction adjusting device (42) in structure.

4. The multifunctional gearbox for the mini-tiller according to claim 3, characterized in that: the walking shaft (44) comprises a left shaft (441) and a right shaft (442), the left shaft (441) is arranged on one side in the box body (1), the right shaft (442) is arranged on the other side in the box body (1), the sprocket D (57) is arranged on the left shaft (441), the right shaft (442) is provided with a sprocket E (443), and the sprocket E (443) is matched with the second direction adjusting device (43) through a chain.