Gear shifting structure and mini-tiller

Abstract

The utility model belongs to the technical field of agricultural instruments, and provides a gear shifting structure and a mini-tiller. The power input shaft is arranged in the box body, the power input shaft is coaxially sleeved with a sliding gear assembly, the sliding gear assembly comprises m sliding gears, and m is larger than or equal to 3; the power output shaft is arranged in the box body, and the power output shaft is coaxially sleeved with transmission gears in one-to-one correspondence with the sliding gears; the transmission shaft is arranged in the box body, the first end of the transmission shaft is coaxially sleeved with a first gear, the second end of the transmission shaft is coaxially sleeved with a second gear, the first gear is meshed with the transmission gear facing the first end of the transmission shaft, and the second gear can be meshed with the sliding gear facing the second end of the transmission shaft; and the driving assembly is used for driving the sliding gear assembly to move. According to the gear shifting structure and the mini-tiller, the structure is simple and compact, adjustment of a reverse gear and a plurality of forward gears can be achieved, the adjusting range is wider, and operation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural implement technical field, concretely relates to a gear shifting structure and micro tiller. BACKGROUND

[0002] The micro tiller can enter the mountainous field that the large -scale agricultural cannot enter because of its light weight, small size, simple structure and other characteristics, thereby becoming the best choice of the majority of peasant consumers to replace the ox tillage.

[0003] In order to improve the applicability of equipment, so that equipment adapts to different operation requirements, therefore, most micro tillers are provided with gear shifting structure.

[0004] However, the above-mentioned gear shifting structure not only has only two gears of fast gear and slow gear for forward gear, and the adjusting range is narrow, and there is no reverse gear, so that the micro tiller cannot be realized when it needs to retreat, leading to the inconvenience of micro tiller operation, and making it impossible to flexibly adjust the direction and position when working in a small space. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model aims to provide a gear shifting structure and micro tiller to solve or alleviate the above technical problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, on the one hand, the utility model provides a gear shifting structure, comprising:

[0007] The box body is provided with a power input shaft, a power output shaft and a gear shifting mechanism.

[0008] The power input shaft is arranged in the box body, and the power input shaft is rotatably connected with the box body.

[0009] The power output shaft is arranged in the box body, and the power output shaft is rotatably connected with the box body.

[0010] a transmission shaft arranged in the box, the transmission shaft being rotationally connected with the box, a first end of the transmission shaft coaxially sleeving a first gear, a second end of the transmission shaft coaxially sleeving a second gear, wherein the first gear is engaged with the transmission gear facing the first end of the transmission shaft, and the second gear is capable of being engaged with the sliding gear facing the second end of the transmission shaft; and

[0011] a driving assembly arranged on the box, the driving assembly being used to drive the sliding gear assembly to move so as to make different gears of the sliding gear assembly engaged.

[0012] Further, the sliding gear assembly has three sliding gears, and the transmission gear is provided with three gears.

[0013] Further, the power output shaft coaxially sleeves a third gear, the third gear being rotationally connected with the power output shaft, and the third gear being kept engaged with the second gear;

[0014] The transmission gear engaged with the first gear is in transmission connection with the power output shaft, and the rest of the transmission gears are rotationally sleeved on the power output shaft and in transmission connection with the third gear.

[0015] Further, a transmission sleeve is coaxially sleeved on the power output shaft, the transmission sleeve being rotationally connected with the power output shaft, the third gear being coaxially sleeved on the transmission sleeve, the third gear being in transmission connection with the transmission sleeve, and the transmission gears in transmission connection with the third gear being coaxially sleeved on the transmission sleeve and in transmission connection with the transmission sleeve.

[0016] Further, the driving assembly comprises:

[0017] a pushing element being slidingly connected with the box, the pushing element having a bayonet, the bayonet being sleeved outside one of the sliding gears; and

[0018] an oscillating arm in Z shape, a first end of the oscillating arm being rotationally connected with the box, and a second end of the oscillating arm being in transmission connection with the pushing element.

[0019] Further, an outer side wall of the pushing element is correspondingly provided with a limiting slot matched with the second end of the oscillating arm, and the second end of the oscillating arm is inserted into the limiting slot.

[0020] Further, the driving assembly further comprises an operating handle, a first end of the operating handle being connected with the box, and a second end of the operating handle being freely extended, the operating handle being in transmission connection with the first end of the oscillating arm through a transmission structure.

[0021] Further, the transmission structure comprises:

[0022] a transmission element rotatably connected with the box, a first end of the operation handle being fixedly connected with the transmission element;

[0023] a first transmission rod, a first end of the first transmission rod being fixedly connected with the transmission element, a second end of the first transmission rod extending away from a rotation center line of the transmission element;

[0024] a second transmission rod, a first end of the second transmission rod being fixedly connected with the first end of the swing arm, a second end of the second transmission rod extending away from a rotation center line of the swing arm; and

[0025] a third transmission rod, a first end of the third transmission rod being connected with the second end of the first transmission rod, a second end of the third transmission rod being connected with the second end of the second transmission rod.

[0026] Further, the transmission structure further comprises:

[0027] a first connecting element, the first connecting element having a first insertion hole and a second insertion hole, an axial line of the first insertion hole and an axial line of the second insertion hole being perpendicular to each other, the second end of the first transmission rod being rotatably inserted into the first insertion hole, the first end of the third transmission rod being rotatably inserted into the second insertion hole; and

[0028] a second connecting element, the second connecting element having a third insertion hole and a fourth insertion hole, an axial line of the third insertion hole and an axial line of the fourth insertion hole being perpendicular to each other, the second end of the third transmission rod being rotatably inserted into the third insertion hole, the second end of the second transmission rod being rotatably inserted into the fourth insertion hole.

[0029] In another aspect, the utility model also provides a micro tiller, comprising the gear shifting structure of any one of the above.

[0030] The utility model discloses the beneficial effects of:

[0031] The gear shifting structure and the micro tiller provided by the utility model have simple and compact structure, can realize gear adjustment of reverse gear and multiple forward gears, have wider adjustment range, and thus improve the convenience of use of the micro tiller. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description. In all the drawings, similar elements or parts are generally indicated by similar reference numerals. In the drawings, various elements or parts are not necessarily drawn according to the actual proportion.

[0033] Figure 1 The utility model an embodiment provides the gear shifting structure's perspective view;

[0034] Figure 2 Fig. 1 is a perspective view of a shift structure according to an embodiment of the present application; Figure 1 Fig. 2 is a perspective view of an internal structure of the shift structure shown in Fig. 1; (in a first direction)

[0035] Figure 3 Fig. 3 is an enlarged view of A shown in Fig. 1; Figure 2 Fig. 4 is a perspective view of an internal structure of the shift structure shown in Fig. 1; (in a second direction)

[0036] Figure 4 Fig. 5 is an enlarged view of B shown in Fig. 1; Figure 1 Fig. 6 is a perspective view of an internal structure of the shift structure shown in Fig. 1; (in a third direction)

[0037] Figure 5 Fig. 7 is an enlarged view of C shown in Fig. 1; Figure 4 Fig. 8 is a perspective view of an internal structure of the shift structure shown in Fig. 1; (in a fourth direction)

[0038] Figure 6 Fig. 9 is a perspective view of a micro tiller according to an embodiment of the present application.

[0039] Reference signs:

[0040] 100, shift structure; 110, box; 120, power input shaft; 130, sliding gear assembly; 131, sliding gear A; 132, sliding gear B; 133, sliding gear C; 140, power output shaft; 151, transmission gear A; 152, transmission gear B; 153, transmission gear C; 160, transmission shaft; 171, first gear; 172, second gear; 173, third gear; 180, transmission sleeve; 191, shifting element; 192, swing arm; 193, operating handle; 194, transmission element; 195, first transmission rod; 196, second transmission rod; 197, third transmission rod; 198, first connecting element; 199, second connecting element; 200, plow blade; 300, traveling wheel; 400, driving device. DETAILED DESCRIPTION

[0041] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0042] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the technical personnel in the field to which the present application belongs.

[0043] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0047] As Figures 1-5 As shown in the figure, the utility model provides a gear shifting structure, including box body 110, power input shaft 120, sliding gear assembly 130, transmission shaft 160, transmission gear and power output shaft 140.

[0048] The power input shaft 120 is arranged in the box body 110, and the power input shaft 120 is rotationally connected with the box body 110. Specifically, in the embodiment, the two ends of the power input shaft 120 are rotationally connected with the side walls on the opposite sides of the box body 110. The power input shaft 120 coaxially sleeves the sliding gear assembly 130, and the sliding gear assembly 130 is slidingly connected with the power input shaft 120, so that the sliding gear assembly 130 can move along the axis of the power input shaft 120, and the sliding gear assembly 130 cannot rotate relative to the power input shaft 120, that is, the power input shaft 120 can drive the sliding gear assembly 130 to rotate. The sliding gear assembly 130 includes m sliding gears, where m≥3.

[0049] The power output shaft 140 is arranged in the box body 110, and the axis of the power output shaft 140 is parallel to the axis of the power input shaft 120. The power output shaft 140 is rotationally connected with the box body 110. Specifically, the two ends of the power output shaft 140 are rotationally connected with the side walls on the opposite sides of the box body 110. The power output shaft 140 coaxially sleeves the transmission gears corresponding to the sliding gears one by one, and each sliding gear and the transmission gear corresponding thereto form a transmission gear set. The transmission ratios of each transmission gear set are different.

[0050] The transmission shaft 160 is arranged in the box body 110, and the axis of the transmission shaft 160 is parallel to the axis of the power input shaft 120. The transmission shaft 160 is rotationally connected with the box body 110. Specifically, the two ends of the transmission shaft 160 are rotationally connected with the side walls on the opposite sides of the box body 110. The first end of the transmission shaft 160 coaxially sleeves the first gear 171, and the second end coaxially sleeves the second gear 172. The positions of the first gear 171 and the second gear 172 on the transmission shaft 160 are fixed and transmissionally connected with the transmission shaft 160, so that the first gear 171 and the second gear 172 cannot move along the axis of the transmission shaft 160 and cannot rotate relative to the transmission shaft 160, thereby enabling the first gear 171 and the second gear 172 to drive the transmission shaft 160 to rotate.

[0051] In order to achieve the above-mentioned purpose, the first gear 171 and the second gear 172 can be slidingly connected with the transmission shaft 160 through a spline structure, and the first gear 171 and the second gear 172 can be limited by a limiting structure, so that the first gear 171 and the second gear 172 cannot move along the axis of the transmission shaft 160. The limiting structure can be a sleeve sleeve on the transmission shaft 160, or the first gear 171 and the second gear 172 can be fixedly connected with the transmission shaft 160.

[0052] The first gear 171 is engaged with the transmission gear facing the first end of the transmission shaft 160, and the second gear 172 can be engaged with the sliding gear facing the second end of the transmission shaft 160.

[0053] The drive assembly is mounted on the housing 110. The drive assembly is used to drive the sliding gear assembly 130 to move, so that the sliding gear assembly 130 meshes with different gears (the second gear 172 and each transmission gear), thereby achieving speed regulation and reversing.

[0054] During operation, the sliding gear assembly 130 is driven to move by the drive assembly, thereby causing the sliding component of the gear assembly to mesh with the second gear 172 or the corresponding transmission gear, thereby achieving the purpose of speed adjustment or reverse gear.

[0055] Specifically, when the sliding gear in the sliding gear assembly 130 meshes with the second gear 172, the power input shaft 120 transmits power to the sliding gear assembly 130 to drive it to rotate. The sliding gear assembly 130 drives the second gear 172 to rotate, the second gear 172 drives the transmission shaft 160 to rotate, the transmission shaft 160 drives the first gear 171 to rotate, the first gear 171 drives the transmission gear it meshes with to rotate, and the transmission gear drives the power output shaft 140 to rotate, thereby achieving the purpose of power output. Since the direction of rotation is changed twice through the second gear 172 (sliding gear and second gear 172) and the first gear 171 (first gear 171 and transmission gear), the purpose of reverse gear is achieved.

[0056] When one of the sliding gears in the sliding gear assembly 130 meshes with its corresponding transmission gear, the power input shaft 120 transmits power to the sliding gear assembly 130 to drive it to rotate. The sliding gear assembly 130 drives the transmission gear to rotate, which in turn drives the power output shaft 140 to rotate, thereby achieving the purpose of power output. By moving the sliding gear assembly 130, different sliding gears can mesh with the transmission gear, thus changing the transmission ratio between the power input shaft 120 and the power output shaft 140, thereby achieving the purpose of adjusting the output speed.

[0057] Specifically, such as Figures 2-4 As shown, in this embodiment, the sliding gear assembly 130 has three sliding gears, namely sliding gear A131, sliding gear B132, and sliding gear C133. Similarly, three transmission gears are provided, namely transmission gear A151, transmission gear B152, and transmission gear C153. Among them, transmission gear C153 meshes with the first gear 171.

[0058] When the shift gear C133 meshes with the transmission gear C153, the power input shaft 120 transmits power to the shift gear assembly 130, the shift gear assembly 130 transmits power to the transmission gear C153 through the shift gear C133, the transmission gear C153 transmits power to the power output shaft 140, so as to achieve the purpose of outputting power.

[0059] Similarly, when the shift gear B132 meshes with the transmission gear B152, the power input shaft 120 transmits power to the shift gear assembly 130, the shift gear assembly 130 transmits power to the transmission gear B152 through the shift gear B132, the transmission gear B152 transmits power to the power output shaft 140, so as to achieve the purpose of outputting power.

[0060] When the shift gear A131 meshes with the transmission gear A151, the power input shaft 120 transmits power to the shift gear assembly 130, the shift gear assembly 130 transmits power to the transmission gear A151 through the shift gear A131, the transmission gear A151 transmits power to the power output shaft 140, so as to achieve the purpose of outputting power.

[0061] When the shift gear A131 meshes with the second gear 172, the power input shaft 120 transmits power to the shift gear assembly 130, the shift gear assembly 130 transmits power to the second gear 172 through the shift gear A131, the second gear 172 transmits power to the transmission shaft 160, the transmission shaft 160 transmits power to the first gear 171, the first gear 171 transmits power to the transmission gear C153, the transmission gear C153 transmits power to the power output shaft 140, so as to achieve the purpose of outputting power, and because the rotation direction is changed twice through the second gear 172 (the shift gear and the second gear 172) and the first gear 171 (the first gear 171 and the transmission gear C153), so as to achieve the purpose of realizing the reverse gear.

[0062] The shift structure provided by the utility model not only achieves the purpose of realizing the reverse gear, but also achieves the purpose of realizing wider speed adjustment by setting multiple shift gears and corresponding transmission gears.

[0063] As shown in the drawings, Figures 2-4 In the embodiment, the power output shaft 140 coaxially sleeves the third gear 173, the third gear 173 is rotationally connected with the power output shaft 140, so that the third gear 173 and the power output shaft 140 can relatively rotate, and the third gear 173 and the second gear 172 are kept in meshing.

[0064] The transmission gear meshing with the first gear 171 is connected to the power output shaft 140 so that the transmission gear can drive the power output shaft 140 to rotate. The remaining transmission gears are rotatably sleeved on the power output shaft 140 and are connected to the third gear 173 so that they can rotate relative to the power output shaft 140, thereby not being able to drive the power output shaft 140 to rotate, but being able to drive the third gear 173 to rotate.

[0065] During operation, the sliding gear assembly 130 transmits power to the third gear 173 via the corresponding transmission gear. The third gear 173 then transmits power to the second gear 172, which in turn transmits power to the drive shaft 160. The drive shaft 160 transmits power to the first gear 171, which in turn transmits power to the meshing transmission gear. This transmission gear then transmits power to the power output shaft 140, thus achieving the purpose of power output. Because the direction of power transmission is changed three times through the transmission gear (sliding gear and drive gear), the second gear 172 (third gear 173 and second gear 172), and the first gear 171 (first gear 171 and drive gear), the output is still the power of the forward gear.

[0066] Specifically, such as Figures 2-4 As shown, in this embodiment, the sliding gear assembly 130 has three sliding gears: sliding gear A131, sliding gear B132, and sliding gear C133. Similarly, three transmission gears are provided: transmission gear A151, transmission gear B152, and transmission gear C153. Transmission gear C153 meshes with the first gear 171 and is also connected to the power output shaft 140 via a spline structure, for example, through a transmission connection or a fixed connection. Transmission gears A151 and B152 are rotatably mounted on the power output shaft 140, and are also connected to the third gear 173.

[0067] During operation, when the sliding gear C133 meshes with the transmission gear C153, the power input shaft 120 transmits power to the sliding gear assembly 130. The sliding gear assembly 130 then transmits power to the transmission gear C153 via the sliding gear C133. The transmission gear C153 then transmits power to the power output shaft 140, thereby achieving the purpose of power output.

[0068] Similarly, when the sliding gear B132 meshes with the transmission gear B152, the power input shaft 120 transmits power to the sliding gear assembly 130, the sliding gear assembly 130 transmits power to the third gear 173 through the sliding gear B132, the third gear 173 transmits power to the second gear 172, the second gear 172 transmits power to the transmission shaft 160, the transmission shaft 160 transmits power to the first gear 171, the first gear 171 transmits power to the transmission gear C153, the transmission gear C153 transmits power to the power output shaft 140, thereby achieving the purpose of power output.

[0069] When the sliding gear A131 meshes with the transmission gear A151, the power input shaft 120 transmits power to the sliding gear assembly 130, the sliding gear assembly 130 transmits power to the third gear 173 through the sliding gear A131, the third gear 173 transmits power to the second gear 172, the second gear 172 transmits power to the transmission shaft 160, the transmission shaft 160 transmits power to the first gear 171, the first gear 171 transmits power to the transmission gear C153, the transmission gear C153 transmits power to the power output shaft 140, thereby achieving the purpose of power output.

[0070] When the sliding gear A131 meshes with the second gear 172, the power input shaft 120 transmits power to the sliding gear assembly 130, the sliding gear assembly 130 transmits power to the second gear 172 through the sliding gear A131, the second gear 172 transmits power to the transmission shaft 160, the transmission shaft 160 transmits power to the first gear 171, the first gear 171 transmits power to the transmission gear C153, the transmission gear C153 transmits power to the power output shaft 140, thereby achieving the purpose of power output, and because the rotation direction is changed twice through the second gear 172 (the sliding gear and the second gear 172) and the first gear 171 (the first gear 171 and the transmission gear C153), thereby achieving the purpose of realizing the reverse gear.

[0071] In this embodiment, by providing the third gear 173, the multi-stage adjustment of the speed from the sliding gear to the transmission gear, the third gear 173 to the second gear 172, and the first gear 171 to the transmission gear is achieved, thereby achieving a higher transmission ratio while making the structure of the entire device more compact.

[0072] As shown in FIG. 1, the device further comprises a transmission sleeve 180. Figures 2-4

[0073] ​The transmission sleeve 180 is coaxially sleeved on the power output shaft 140, and the transmission sleeve 180 is rotationally connected with the power output shaft 140, so that the transmission sleeve 180 can rotate relative to the power output shaft 140. The third gear 173 is coaxially sleeved on the transmission sleeve 180, and the third gear 173 is drivingly connected with the transmission sleeve 180, so that the third gear 173 cannot rotate relative to the transmission sleeve 180. For example, the third gear 173 is drivingly connected with the transmission sleeve 180 through a spline structure, or the third gear 173 is fixedly connected with the transmission sleeve 180.

[0074] The transmission gears drivingly connected with the third gear 173 are coaxially sleeved on the transmission sleeve 180 and drivingly connected with the transmission sleeve 180, so that the transmission gears cannot rotate relative to the transmission sleeve 180. For example, the transmission gears are drivingly connected with the transmission sleeve 180 through a spline structure, or the transmission gears are fixedly connected with the transmission sleeve 180.

[0075] As shown in Figures 2-4 , the driving assembly comprises a poking element 191 and a swing arm 192.

[0076] The poking element 191 is slidingly connected with the box body 110, and the poking element 191 has a bayonet sleeve outside one of the sliding gears. The swing arm 192 is Z-shaped, and a first end of the swing arm 192 is rotationally connected with the box body 110, and a second end of the swing arm 192 is drivingly connected with the poking element 191. Specifically, an outer side wall of the poking element 191 is provided with a limiting groove corresponding to the second end of the swing arm 192, and the second end of the swing arm 192 is inserted into the limiting groove.

[0077] In operation, the swing arm 192 is rotated, the swing arm 192 moves the poking element 191, and then the poking element 191 moves the sliding gear assembly 130, so that the sliding gear assembly 130 meshes with different gears, thereby achieving the purpose of gear adjustment.

[0078] As shown in Figure 1 , 2 , 4, the driving assembly further comprises an operating handle 193.

[0079] The first end of the operating handle 193 is connected with the box body 110, and the second end is freely extended. The operating handle 193 is drivingly connected with the first end of the swing arm 192 through a transmission structure.

[0080] In operation, an acting force is applied to the operating handle 193, the operating handle 193 drives the swing arm 192 to rotate through the transmission structure, the swing arm 192 drives the poking element 191 to move, and then the poking element 191 moves the sliding gear assembly 130, so that the sliding gear assembly 130 meshes with different gears, thereby achieving the purpose of gear adjustment.

[0081] As shown in Figures 2-4As shown, the transmission structure includes a transmission element 194, a first transmission rod 195, a second transmission rod 196, and a third transmission rod 197.

[0082] The transmission element 194 is rotatably connected to the housing 110. The first end of the operating handle 193 is fixedly connected to the transmission element 194. The first end of the first transmission rod 195 is fixedly connected to the transmission element 194, and the second end extends away from the rotation center line of the transmission element 194. The first end of the second transmission rod 196 is fixedly connected to the first end of the swing arm 192, and the second end extends away from the rotation center line of the swing arm 192. The first end of the third transmission rod 197 is connected to the second end of the first transmission rod 195, and the second end is connected to the second end of the second transmission rod 196.

[0083] During operation, torque is applied to the operating handle 193 to drive the transmission element 194 to rotate, thereby causing the second end of the first transmission rod 195 to swing around the rotation center line of the transmission element 194. The first transmission rod 195 transmits power to the third transmission rod 197, thereby driving the third transmission rod 197 to move. The third transmission rod 197 transmits power to the second transmission rod 196, thereby driving the second transmission rod 196 to rotate. The second transmission rod 196 drives the swing arm 192 to rotate. The swing arm 192 drives the actuating element 191 to move, and then the actuating element 191 moves the sliding gear assembly 130, so that the sliding gear assembly 130 meshes with different gears, thereby achieving the purpose of gear adjustment.

[0084] like Figures 2-4 As shown, the transmission structure also includes a first connecting element 198 and a second connecting element 199.

[0085] The first connecting element 198 has a first socket and a second socket, the axis of the first socket and the axis of the second socket are perpendicular to each other. The second end of the first transmission rod 195 is rotatably inserted into the first socket, and the first end of the third transmission rod 197 is rotatably inserted into the second socket. By setting the first connecting element 198, a universal structure is formed at the connection between the first transmission rod 195 and the third transmission rod 197, thereby ensuring the reliability of power transmission between the first transmission rod 195 and the third transmission rod 197, while preventing the first transmission rod 195 and the third transmission rod 197 from jamming together.

[0086] The second connecting element 199 has a third insertion hole and a fourth insertion hole, the axis of the third insertion hole and the axis of the fourth insertion hole are perpendicular to each other, the second end of the third transmission rod 197 is rotatably inserted into the third insertion hole, and the second end of the second transmission rod 196 is rotatably inserted into the fourth insertion hole, so that a universal structure is formed at the connection position of the third transmission rod 197 and the second transmission rod 196, so as to ensure the reliability of power transmission between the third transmission rod 197 and the second transmission rod 196, and meanwhile, the third transmission rod 197 and the second transmission rod 196 will not be locked with each other.

[0087] As Figure 6 shown, the utility model also provides a kind of micro tiller, including frame, is provided with plough blade 200, walking wheel 300 and drive arrangement 400 on frame, still including the gear shifting structure 100 described in any embodiment above.Wherein, drive arrangement can be internal combustion engine, it can also be motor.

[0088] In the specification of the utility model, a large number of specific details are explained. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail, so as not to obscure the understanding of the specification.

[0089] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should be covered in the scope of the claims and the specification of the utility model.

Claims

1. A shift structure characterized by comprising: The utility model relates to a kind of gear shifters, including: Box; Power input shaft is arranged in the box, the power input shaft is rotatably connected with the box, the power input shaft coaxially covers gear shift assembly, the gear shift assembly is slidably connected with the power input shaft, the gear shift assembly includes m gear shifts, wherein, m≥3; Power output shaft is arranged in the box, the power output shaft is rotatably connected with the box, the power output shaft coaxially covers transmission gear corresponding with the gear shift, and each gear shift and the transmission gear corresponding with it form a transmission gear group, and the transmission ratio of each transmission gear group is different; Transmission shaft is arranged in the box, the transmission shaft is rotatably connected with the box, the first end of the transmission shaft coaxially covers first gear, the second end coaxially covers second gear, wherein the first gear is engaged with the transmission gear facing the first end of the transmission shaft, and the second gear can be engaged with the gear shift facing the second end of the transmission shaft;And Drive assembly is arranged on the box, and the drive assembly is used to drive the gear shift assembly to move, so that different gears of the gear shift assembly are engaged.

2. The shift structure according to claim 1, characterized by The gear shift assembly has three gear shifts, and the transmission gear is provided with three gears.

3. The shift structure according to claim 1 or 2, characterized by The power output shaft coaxially covers third gear, the third gear is rotatably connected with the power output shaft, and the third gear is kept engaged with the second gear; The transmission gear engaged with the first gear is drivingly connected with the power output shaft, and the remaining transmission gears are rotatably sleeved on the power output shaft and drivingly connected with the third gear.

4. The shift structure according to claim 3, characterized by It also includes transmission sleeve, the transmission sleeve is coaxially sleeved on the power output shaft, the transmission sleeve is rotatably connected with the power output shaft, the third gear is coaxially sleeved on the transmission sleeve, the third gear is drivingly connected with the transmission sleeve, and the transmission gear drivingly connected with the third gear is coaxially sleeved on the transmission sleeve and drivingly connected with the transmission sleeve.

5. The shift structure according to claim 1, 2 or 4, characterized by The drive assembly includes: Dialing element is slidably connected with the box, the dialing element has bayonet, and the bayonet is sleeved outside one of the gear shifts;And Swing arm is Z-shaped, the first end of the swing arm is rotatably connected with the box, and the second end is drivingly connected with the dialing element.

6. The shift structure according to claim 5, characterized by The outer side wall of the dialing element is correspondingly provided with limiting slot matched with the second end of the swing arm, and the second end of the swing arm is inserted into the limiting slot.

7. The shift structure according to claim 5, characterized by The drive assembly further includes operating handle, the first end of the operating handle is connected with the box, and the second end is freely extended, and the operating handle is drivingly connected with the first end of the swing arm through transmission structure.

8. The shift structure according to claim 7, characterized by The transmission structure includes: Transmission element is rotatably connected with the box, and the first end of the operating handle is fixedly connected with the transmission element; First transmission rod, the first end of the first transmission rod is fixedly connected with the transmission element, and the second end extends away from the rotation center line of the transmission element. a second transmission rod having a first end fixedly connected to a first end of the swing arm and a second end extending away from a rotation center line of the swing arm; and a third transmission rod having a first end connected to a second end of the first transmission rod and a second end connected to a second end of the second transmission rod.

9. The shift structure according to claim 8, characterized by The transmission structure further comprises: a first connecting element having a first insertion hole and a second insertion hole, an axis of the first insertion hole and an axis of the second insertion hole being perpendicular to each other, the second end of the first transmission rod being rotatably inserted into the first insertion hole, the first end of the third transmission rod being rotatably inserted into the second insertion hole; and a second connecting element having a third insertion hole and a fourth insertion hole, an axis of the third insertion hole and an axis of the fourth insertion hole being perpendicular to each other, the second end of the third transmission rod being rotatably inserted into the third insertion hole, the second end of the second transmission rod being rotatably inserted into the fourth insertion hole.

10. A mini-tiller characterized by, The transmission structure comprises any one of claims 1-9.

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