Gear shifting mechanism and mini-tiller

Abstract

The utility model discloses a gear shifting mechanism and a mini-tiller. The gear shifting mechanism comprises a first rotating shaft, a second rotating shaft, a plurality of gear shifting gears, a duplicate gear, a gear shifting fork and a gear block, wherein the first rotating shaft and the second rotating shaft are vertically arranged in parallel at intervals; the gear shifting gears are arranged on the first rotating shaft and are distributed at intervals; the duplicate gear is installed on the second rotating shaft in a sliding mode; the gear block is provided with a plurality of gear clamping grooves for the gear shifting forks to be clamped in. A gear block is arranged on the side of a gear shifting fork, a plurality of gear clamping grooves are formed in the gear block, and when the gear shifting fork pushes a duplicate gear to be meshed with all gear shifting gears, the gear shifting fork can be correspondingly clamped into the gear clamping grooves in different positions; the gear shifting fork is clamped into the gear clamping grooves in different positions, so that an operator can accurately distinguish the gear shifting condition conveniently, and damage to a machine caused by frequent gear shifting operation of the operator is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of micro-tillage machines, and particularly relates to a shift mechanism and a micro-tillage machine. Background Art

[0002] In China's vast rural areas, micro-tillage machines are being used more and more widely, playing a huge role in tilling and farming. The operator usually holds the handle frame assembly of the multi-speed adjustment gearbox of the micro-tillage machine with both hands and moves forward with the micro-tillage machine, and controls the rotation of the walking wheels at both ends through the cables set on the handle.

[0003] When tilling or moving on non-arable land, or in different terrains, the tiller needs to operate at different speeds to meet different practical needs. However, the current gear shift mechanism of the tiller only switches gears by moving the shift gear to engage with other gears in different positions. During the gear shifting process, the shifting status cannot be accurately identified, resulting in the operator frequently operating the gear and causing damage to the machine. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a shifting mechanism and a micro-tiller, aiming to solve the technical problem that the current micro-tiller cannot accurately identify the shifting process.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a shift mechanism, comprising a first rotating shaft and a second rotating shaft arranged in parallel and spaced apart in an upper and lower direction, a plurality of shift gears of different sizes arranged on the first rotating shaft and distributed at intervals, a double gear slidably mounted on the second rotating shaft, a shift fork having one end arranged on the double gear and used to push the double gear to slide so as to engage with each of the shift gears to achieve gear switching, and a shift block arranged beside the shift fork and connected to the shift fork to limit the sliding stroke of the shift fork, wherein the shift block is provided with a plurality of gear slots for the shift fork to be engaged.

[0006] Furthermore, the shift block includes a pair of symmetrically distributed clamping parts, and the clamping parts include a plurality of shift clamping slots distributed along the length direction of the shift block, and the height of each shift clamping slot gradually increases toward the end of the shift block.

[0007] Furthermore, the shift fork is provided with a steel ball for engaging with the gear slot.

[0008] Furthermore, it also includes an elastic member for elastically pushing up the steel ball, the elastic member is connected to the steel ball, and the shift fork is provided with a receiving groove for receiving the elastic member.

[0009] Furthermore, the double gear is provided with a shift groove for engaging the shift fork.

[0010] The present application also provides a micro-tillage machine, comprising:

[0011] case;

[0012] A shift mechanism is provided in the housing and connected to an external power machine for realizing shifting of gears;

[0013] a steering mechanism, disposed in the housing and in transmission connection with the shift mechanism, for receiving external power and performing steering adjustment, and;

[0014] a brake assembly, disposed on the housing corresponding to the position of the steering mechanism, for interrupting power transmission of the steering mechanism;

[0015] The shift mechanism is the shift mechanism described above.

[0016] Furthermore, the brake assembly includes a plurality of limiting shafts distributed in a ring-like manner, and the steering mechanism is provided with a limiting block that cooperates and abuts against each of the limiting shafts.

[0017] Furthermore, the steering mechanism includes a third rotating shaft rotatably arranged in the housing and parallel to the first rotating shaft, a steering tooth slidably mounted on the third rotating shaft, and a steering fork arranged on the steering tooth and used to push the steering tooth to move toward the direction of the limit axis, and the limit block is provided on the side of the steering tooth.

[0018] Furthermore, the number of the limit blocks is three, and the limit blocks are distributed at intervals along the circumferential direction of the steering gear.

[0019] The beneficial effects of the present invention are as follows: compared with the prior art, a shift mechanism in the present invention is provided with a first rotating shaft and a second rotating shaft arranged in parallel with an upper and lower interval, the first rotating shaft is provided with a plurality of shift gears of different sizes, the second rotating shaft is provided with a double gear, and the double gear is provided with a shift fork, so that the double gear can be moved to slide by the shift fork, so that the double gear is matched and connected with each shift gear to realize the switching of different gears; by providing a shift block beside the shift fork, and providing a plurality of gear slots on the shift block, when the shift fork pushes the double gear to engage with each shift gear, the shift fork can be correspondingly inserted into the gear slots at different positions; by the shift fork being inserted into the gear slots at different positions, it is convenient for the operator to accurately identify the shifting situation, thereby avoiding damage to the machine caused by frequent shifting operations by the operator.

[0020] Other advantages, objectives, and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or they may be taught by those skilled in the art from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:

[0022] Figure 1 This is a structural diagram of a micro-tillage machine proposed in one embodiment of the present utility model;

[0023] Figure 2 This is a structural diagram of the micro-tillage machine with the shell removed according to an embodiment of the present invention;

[0024] Figure 3 This is a structural schematic diagram of the micro-tillage machine from another perspective after removing the shell, according to one embodiment of the present invention;

[0025] Figure 4 The present invention is proposed in one embodiment Figure 3 A magnified view of middle A;

[0026] Figure 5 The present invention is proposed in one embodiment Figure 3 Magnified view of B.

[0027] Figure Number:

[0028] 1- shell;

[0029] 2-shift mechanism; 21-first rotating shaft; 22-second rotating shaft; 23-shift gear; 24-dual gear; 25-shift fork; 26-shift block; 261-shift slot; 27-steel ball;

[0030] 3-steering mechanism; 31-third rotating shaft; 32-steering gear; 33-limiting block; 34-steering fork;

[0031] 4-brake assembly; 41-limiting shaft. DETAILED DESCRIPTION

[0032] like Figures 1 to 5As shown, this embodiment proposes a shift mechanism 2, including a first rotating shaft 21 and a second rotating shaft 22, the first rotating shaft 21 and the second rotating shaft 22 are arranged in parallel and spaced apart in an upper and lower manner, a plurality of shift gears 23 of different sizes are spaced apart on the first rotating shaft 21, a double gear 24 is slidably mounted on the second rotating shaft 22, a shift fork 25 is provided on the double gear 24, the shift fork 25 can push the double gear 24 to slide so that the double gear 24 engages with the shift gear 23 to realize gear switching, and in addition, a shift block 26 is provided on the side of the shift fork 25, and a plurality of gear slots 261 are provided on the shift block 26, each of which can be used for the shift fork 25 to be inserted. By means of a first rotating shaft 21 and a second rotating shaft 22 which are arranged in parallel with each other at an upper and lower interval, a plurality of shift gears 23 of different sizes are provided on the first rotating shaft 21, a double gear 24 of different sizes is provided on the second rotating shaft 22, and a shift fork 25 is provided on the double gear 24, so that the double gear 24 can be moved to slide by the shift fork 25, so that the double gear 24 is matched with each shift gear 23 to realize the switching of different gears; by providing a shift block 26 beside the shift fork 25, and providing a plurality of gear slots 261 on the shift block 26, when the shift fork 25 pushes the double gear 24 to engage with each shift gear 23, the shift fork 25 can be correspondingly snapped into the gear slots 261 at different positions; by snapping the shift fork 25 into the gear slots 261 at different positions, it is convenient for the operator to accurately identify the shifting situation, thereby avoiding damage to the machine caused by frequent shifting by the operator.

[0033] In the present application, the shift fork 25 is engaged in the gear slots 261 at different positions, thereby limiting the sliding stroke of the shift fork 25 and enhancing the stability of the engagement between the dual gear 24 and the shift gear 23 .

[0034] In the present application, the double gear 24 is formed by two gears of different outer diameters. Thus, when the gear needs to be adjusted, the double gear 24 is moved by the shift fork 25 so that the double gear 24 meshes with the shift gear of different sizes, thereby achieving the gear switch.

[0035] Further, see Figure 2 As shown, the shift block 26 includes a pair of symmetrically distributed engaging portions. Specifically, the engaging portions include multiple shift slots 261 distributed along the length of the shift block 26. The height of each shift slot 261 gradually increases toward the end of the shift block 26. By arranging the shift slots 261 at different heights, when shifting, the shift fork 25 engages with the shift slots 261 at different heights, making it easier for the operator to identify the shift status and making the shifting clear.

[0036] Further, see Figures 2 to 4As shown, the shift fork 25 is provided with a steel ball 27, which can be used to cooperate with the gear slot 261. By providing the steel ball 27, when the steel ball 27 is inserted into the gear slot 261, the shift fork 25 can be fixed.

[0037] Further, see Figure 4 As shown, the shift mechanism 2 further includes an elastic member (not shown in the drawings) for elastically pushing up the steel ball 27. The elastic member is connected to the steel ball 27, and a receiving groove for accommodating the elastic member is provided on the shift fork 25. The provision of the elastic member ensures that the steel ball 27 continuously abuts the shift block 26. When the steel ball 27 is engaged with the shift slot 261, the elastic force of the elastic member pushes the steel ball 27 continuously into the shift slot 261, further enhancing the meshing force between the dual gear 24 and the shift gear 23. The provision of the receiving groove effectively accommodates the elastic member and, at the same time, guides the elastic member to push up the steel ball 27 in a specific direction, facilitating the steel ball 27 to better engage with the shift slot 261.

[0038] Furthermore, a shifting groove is provided on the double gear 24, in which the shift fork 25 is placed. By providing the shifting groove, the shifting fork 25 is facilitated to push the double gear 24 to move.

[0039] This application also provides a micro-tillage machine, please refer to Figure 1 As shown, the micro-tiller includes a shell 1, in which a shift mechanism 2, a steering mechanism 3, and a brake assembly 4 are provided. The shift mechanism 2 can be connected to an external power machine to achieve gear switching; the steering mechanism 3 is transmission-connected to the shift mechanism 2 and can be used to receive external power for steering adjustment. The brake assembly 4 is arranged on the shell 1 corresponding to the position of the steering mechanism 3. The brake assembly 4 can be used to interrupt the power transmission of the steering mechanism 3. In addition, the shift mechanism 2 is the shift mechanism 2 described above, and they will not be described one by one here.

[0040] In the present application, when the shift mechanism 2 is in operation, its power comes from an external power machine, that is, the power is output by the power machine and directly transmitted to the shift gear 23 through the first rotating shaft 21. The shift fork 25 drives the double gear 24 to engage with different shift gears 23, thereby realizing the transmission of power and the switching of gears.

[0041] Preferably, see Figure 3 and Figure 5 As shown, the brake assembly 4 includes a plurality of limiting shafts 41 distributed in an annular pattern, and the steering mechanism 3 is provided with limiting blocks 33 that cooperate with and abut against each limiting shaft 41. The limiting shafts 41 cooperate with and abut against the limiting blocks 33, thereby interrupting the power output of the steering mechanism 3.

[0042] Further, see Figure 2 and Figure 5 As shown, the steering mechanism 3 includes a third rotating shaft 31 and a steering tooth 32. The third rotating shaft 31 is rotatably disposed in the housing 1 and is arranged parallel to the first rotating shaft 21. The steering tooth 32 is slidably mounted on the third rotating shaft 31. In addition, the steering mechanism 3 also includes a steering fork 34, which is disposed on the steering tooth 32 and can push the steering tooth 32 toward the limit shaft 41. The limit block 33 is provided on the side of the steering tooth 32. Preferably, there are two steering teeth 32 and two steering forks 34. For ease of description, the two steering teeth are defined as a left steering tooth and a right steering tooth, and the two steering forks 34 are defined as a left steering fork and a right steering fork. When turning right, by rotating the right steering fork clockwise, the right steering fork pushes the right steering tooth to move toward the limit shaft. When the limit block of the right steering tooth is connected to the limit shaft, the power of the right steering shaft is cut off. At this time, the right turn is achieved by the action of the left steering tooth; when turning left, by rotating the left steering fork counterclockwise, the left steering fork pushes the left steering tooth to move toward the limit shaft. When the limit block of the left steering tooth is connected to the limit shaft, the power of the left steering shaft is cut off. At this time, left and right turns are achieved by the action of the right steering tooth.

[0043] Furthermore, there are three stop blocks 33, each spaced apart along the circumference of the steering gear 32. Accordingly, there are also three stop shafts 41. By providing three stop blocks 33, the steering gear 32 can be braked by abutting the stop blocks 33 against the stop shafts 41, thereby enhancing the braking effect of the steering gear 32 and the stop shafts 41. Of course, in this embodiment, the number of stop blocks 33 may also be set to another number depending on actual conditions and specific needs, and this is not a single limitation.

[0044] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A shift mechanism, characterized in that: The gear shifting mechanism comprises a first rotating shaft and a second rotating shaft which are arranged in parallel and spaced apart in an upper and lower direction, a plurality of shift gears of different sizes which are arranged on the first rotating shaft and distributed at intervals, a double gear which is slidably mounted on the second rotating shaft, a shift fork which has one end arranged on the double gear and is used to push the double gear to slide so as to engage with each of the shift gears to realize gear switching, and a shift block which is arranged beside the shift fork and connected to the shift fork to limit the sliding stroke of the shift fork, wherein the shift block is provided with a plurality of gear slots for the shift fork to be engaged with.

2. A shift mechanism according to claim 1, characterized in that: The shift block includes a pair of symmetrically distributed clamping parts, and the clamping parts include a plurality of shift clamping slots distributed along the length direction of the shift block. The height of each shift clamping slot gradually increases toward the end of the shift block.

3. A shift mechanism according to claim 2, characterized in that: The shift fork is provided with a steel ball for engaging with the gear slot.

4. A shift mechanism according to claim 3, characterized in that: It also includes an elastic member for elastically pushing the steel ball, the elastic member is connected to the steel ball, and the shift fork is provided with a receiving groove for receiving the elastic member.

5. The shift mechanism according to claim 1, characterized in that: The double gear is provided with a shift groove for clamping the shift fork.

6. A micro-tillage machine, characterized in that: include: case; A shift mechanism is provided in the housing and connected to an external power machine for realizing shifting of gears; a steering mechanism, disposed in the housing and in transmission connection with the shift mechanism, for receiving external power and performing steering adjustment, and; a brake assembly, disposed on the housing corresponding to the position of the steering mechanism, for interrupting power transmission of the steering mechanism; The shift mechanism is the shift mechanism according to any one of claims 1 to 5.

7. The micro-tillage machine according to claim 6, characterized in that: The brake assembly includes a plurality of limiting shafts distributed in a ring-like manner, and the steering mechanism is provided with limiting blocks that cooperate with and abut against each of the limiting shafts.

8. The micro-tillage machine according to claim 7, characterized in that: The steering mechanism includes a third rotating shaft rotatably arranged in the housing and parallel to the first rotating shaft, a steering tooth slidably mounted on the third rotating shaft, and a steering fork arranged on the steering tooth and used to push the steering tooth to move toward the limit axis. The limit block is provided on the side of the steering tooth.

9. The micro-tillage machine according to claim 8, characterized in that: There are three limit blocks, and the limit blocks are distributed at intervals along the circumferential direction of the steering gear.

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