Energy-saving seeding and ditching device
By introducing a rotating shaft and connecting cylinder structure into the rotary tiller, combined with a synchronous adjustment component and motor drive, the problem of fixed rotary tiller blade angle is solved, enabling flexible adjustment of the rotary tiller blade direction and improving work efficiency and continuity.
Patent Information
- Application Number
- CN202511896564.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-02-27
AI Technical Summary
Traditional rotary tillers have fixed blade angles, causing soil to be thrown to the wrong side, making it impossible to achieve efficient "S" or "Z" shaped movement and reducing work efficiency.
Design an energy-saving seeding and furrowing device that adopts a rotating shaft and connecting cylinder structure. The direction of soil throwing of the rotary tiller blades is adjusted by a synchronous adjustment component to ensure that the soil is not thrown to the wrong side when turning around. The synchronous belt and motor drive realize the synchronous rotation of multiple rotary tiller blades, and the staggered arrangement of the rotary tiller blades ensures that the soil is thrown out smoothly.
It enables continuous operation when the trencher turns around, improving work efficiency and preventing soil from being thrown into the wrong area when traveling in reverse, thus avoiding the formation of continuous ditches or ridges.
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Figure CN121569638A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of agricultural planting technology, in particular to an energy-saving type seeding and ditching device. BACKGROUND
[0002] Agricultural ditching is a basic operation in agricultural production, which refers to digging a ditch with a specific depth and width in the field by professional equipment, mainly used for farmland irrigation and drainage, laying of fertilizer pipeline, and separation of ridges during crop planting, and preventing crop root rot caused by water accumulation in the field. It is usually completed by a ditching device pulled by a farm machine. A rotary tiller is a commonly used core component. The soil is cut and crushed by the rotating blade, and the soil is thrown to both sides or one side by controlling the angle of the blade head, forming a regular ditch.
[0003] The core working component of the traditional rotary tiller is a high-speed rotating shaft and a symmetrical L-shaped curved blade installed thereon. During operation, the curved blade cuts the soil and relies on its unique curved structure and rotational centrifugal force to throw the soil to both sides. This "two-way soil throwing" mode creates a soft seedbed, but also has a significant disadvantage: during ditching operation, the already excavated ditch is inevitably covered with backfilled soil. This not only leads to unclear ditch shape and non-uniform depth, affecting the uniformity and depth consistency of seeding, but also causes energy waste - part of the power is used to repeatedly throw the soil.
[0004] To solve the above problems, the skilled person in the art proposes a "one-way soil throwing" rotary tiller. This technology adjusts the curved direction of all rotary tiller blades on the shaft to the same side, so that the cut soil is thrown to one side. This effectively overcomes the ditch backfilling problem caused by two-way soil throwing, and is particularly suitable for agricultural operations such as ridging, soil preparation, and soil preparation that require soil to be concentrated in one direction. This significantly improves the operation quality.
[0005] However, in actual use, this ditcher is limited by the fixed angle of the rotary tiller and can only throw soil to one side. This operation mode cannot achieve efficient "S" or zigzag shuttle walking, because when the ditcher turns around and travels in the opposite direction, the fixed soil throwing direction will cause the soil to be thrown to the wrong side, such as into the worked area or the unworked area, and cannot form a continuous ditch or ridge. Therefore, the ditcher cannot work continuously during the return trip, reducing the operation efficiency. Therefore, we propose an energy-saving type seeding and ditching device. SUMMARY
[0006] The technical problem to be solved by the present application is that the furrow opener is limited by the fixed angle of the rotary blade and can only throw soil to one side. This operation mode cannot realize efficient "S" shape or zigzag shuttle walking, because when the furrow opener turns around and travels in the opposite direction, the fixed soil throwing direction will cause the soil to be thrown to the wrong side, such as into the worked area or the unworked area, and cannot form continuous gullies or ridges, so the furrow opener cannot work continuously when returning, reducing the operation efficiency. To solve the above technical problems, the present application provides an energy-saving seeding and furrowing device, which comprises a furrowing machine and a plurality of furrowing assemblies. The furrowing assembly comprises a rotating shaft and two connecting barrels. The two connecting barrels are sleeved on the outside of the rotating shaft. The outer surface of the rotating barrel is circumferentially arranged with a plurality of rotating barrels. The rotating barrel is rotatably connected to the outside of the connecting barrel. The inside of the rotating barrel is provided with a rotary tillage assembly. The inside of the rotating barrel is provided with a synchronous adjusting assembly. The synchronous adjusting assembly synchronously drives the rotation of the plurality of rotary tillage assemblies.
[0007] In some embodiments, the rotary tillage assembly comprises a handle, which is rotatably connected to the inside of the rotating barrel. The other end of the plurality of handles is provided with a rotary tillage blade.
[0008] In some embodiments, the synchronous adjusting assembly comprises a connecting shaft, which is arranged on the side of the handle facing the connecting barrel. The connecting shaft extends into the inside of the connecting barrel.
[0009] In some embodiments, the synchronous adjusting assembly further comprises a support barrel rotatably connected to the inside of the connecting barrel. The front side outer surface of the support barrel is provided with an annular synchronous belt. The side of the connecting shaft located in the inside of the connecting barrel is provided with a synchronous belt pulley. The plurality of synchronous belt pulleys are in movable engagement with the outer surface of the annular synchronous belt.
[0010] In some embodiments, the synchronous adjusting assembly further comprises a first motor, which is mounted on the front side inner wall of the connecting barrel. The output end of the first motor is provided with a transmission gear. The inner wall of the support barrel is provided with a gear ring. The transmission gear is in movable engagement with the outer surface of the gear ring.
[0011] In some embodiments, the rotary tillage blades on the outside of the two connecting barrels of the same group are arranged in a staggered manner.
[0012] In some embodiments, the side of the handle facing the connecting barrel is connected with a mounting block. The side of the connecting shaft facing the handle is provided with a mounting groove. The mounting block is movably inserted into the inside of the mounting groove. The outer surface of the rotating barrel is threaded with a bolt. The mounting block is threadedly connected to the inside of the mounting groove through the bolt.
[0013] In some embodiments, the inner wall of the connecting barrel is provided with a storage battery. The storage battery is electrically connected with the first motor.
[0014] In some embodiments, the front end of the trencher is rotatably connected to a support shaft facing downwards, and two connecting frames are sleeved on the outer surface of the support shaft. The rotating shaft is rotatably connected between the two connecting frames, and a second motor is installed on the outer surface of one of the connecting frames. The output end of the second motor is connected to the rotating shaft.
[0015] In some embodiments, a drive assembly is installed below the ditcher to drive the support shaft to rotate, thereby causing the rotary tiller blades to move up and down. The drive assembly includes a third motor installed at the bottom of the ditcher. The output end of the third motor is fitted with a drive gear, and the outer surface of the support shaft is fitted with a driven gear. The outer surfaces of the drive gear and the driven gear are movably meshed.
[0016] The present invention has at least the following beneficial effects: 1. In this invention, by setting a blade handle and rotary tillage blades, and rotating the blade handle inside the rotating cylinder, when the ditcher turns around, the blade handle rotates inside the rotating cylinder to adjust the direction of the rotary tillage blades. This allows the soil throwing direction to be adjusted when turning around, preventing the soil from being thrown to the wrong side, forming continuous furrows or ridges, and improving work efficiency.
[0017] 2. In this invention, by setting a connecting shaft on one side of the blade handle, the first motor drives the transmission gear to rotate, the transmission gear drives the gear ring to rotate the support cylinder, and when the support cylinder rotates, the annular synchronous belt on it rotates. The annular synchronous belt meshes with the synchronous pulley, driving the synchronous pulley to rotate, thereby causing multiple connecting shafts to rotate simultaneously. Through multiple connecting shafts, multiple blade handles are driven to rotate, thereby enabling synchronous control of multiple rotary tillers in the same group to rotate simultaneously.
[0018] 3. In this invention, the rotary tillers on both sides of the same group are staggered, so that the soil after trenching is thrown out from the gap between the opposite rotary tillers, thus avoiding the rotary tillers from blocking the soil and affecting the throwing out of the soil. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall front view of the present invention; Figure 2 This is a schematic diagram of the connecting frame and related structures of the present invention; Figure 3 This is a schematic diagram of the single-unit rotary tillage blade structure of the present invention; Figure 4 This is a schematic diagram of a single connecting cylinder and its related structures according to the present invention; Figure 5 This is a schematic diagram of the front cross-sectional structure of a single connecting cylinder of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 It is a single connecting cylinder rear view schematic diagram of the application; Figure 8 It is a single connecting cylinder rear view schematic diagram of the application; Figure 7 It is an enlarged structure schematic diagram of B in the application; Figure 9 It is a knife handle and connecting shaft structure schematic diagram of the application; Figure 10 It is a structure schematic diagram of two groups of rotary tillage knives staggered arrangement of the application.
[0020] In the figure: 1, rotary shaft; 2, connecting cylinder; 3, rotating cylinder; 4, knife handle; 5, rotary tillage knife; 6, synchronous adjusting assembly; 61, support cylinder; 62, annular synchronous belt; 63, connecting shaft; 64, synchronous pulley; 65, first motor; 66, transmission gear; 67, gear ring; 7, ditcher; 71, connecting frame; 72, second motor; 73, support shaft; 8, driving assembly; 81, third motor; 82, driving gear; 83, driven gear. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the application.
[0022] Embodiment 1: Please refer to Figures 1-9 The application provides a technical solution: an energy-saving seeding and ditching device, which comprises a ditcher 7 and multiple groups of ditching assemblies, the ditching assembly comprises a rotary shaft 1 and two connecting cylinders 2, the two connecting cylinders 2 are both sleeved outside the rotary shaft 1, the outer surface of a rotating cylinder 3 is provided with multiple rotating cylinders 3 in a circumferential array, the rotating cylinder 3 is rotationally connected outside the connecting cylinder 2, the inside of the rotating cylinder 3 is provided with a rotary tillage assembly, the inside of the rotating cylinder 3 is provided with a synchronous adjusting assembly 6, the multiple rotary tillage assemblies are synchronously driven to rotate through the synchronous adjusting assembly 6, specifically, when the ditching work is performed by making the rotary tillage assembly contact the ground while the ditcher 7 travels in the field, the ditching assembly performs the ditching work, when turning around and traveling, the multiple rotary tillage assemblies are synchronously driven to rotate through the synchronous adjusting assembly 6, so that the throwing direction can be adjusted, so that the throwing direction can be adjusted when turning around, so that the soil is prevented from being thrown to the wrong side, so that continuous gullies or ridges can be formed, and the work efficiency is improved.
[0023] The rotary tillage assembly comprises the knife handle 4 which is rotationally connected in the interior of the rotary cylinder 3, the other end of the plurality of knife handles 4 is provided with the rotary tillage knife 5, specifically, the rotary tillage knife 5 is in contact with the ground, and the rotary tillage knife 5 is driven to rotate by the driving rotary shaft 1, the rotary tillage knife 5 is driven to rotate by the rotary shaft 1, and the rotary tillage knife 5 is driven to rotate by the rotary shaft 1.
[0024] Embodiment 2: please refer to Figures 1-9 The application provides a technical scheme: the synchronous adjusting assembly 6 comprises the connecting shaft 63, the connecting shaft 63 is arranged on the side of the knife handle 4 which is towards the connecting cylinder 2, and the connecting shaft 63 extends to the interior of the connecting cylinder 2.
[0025] The synchronous adjusting assembly 6 further comprises the supporting cylinder 61 which is rotationally connected in the interior of the connecting cylinder 2, the front side outer surface of the supporting cylinder 61 is provided with the annular synchronous belt 62, the side of the connecting shaft 63 which is located in the interior of the connecting cylinder 2 is provided with the synchronous pulley 64, the plurality of synchronous pulleys 64 are all in movable engagement with the outer surface of the annular synchronous belt 62, specifically, when the supporting cylinder 61 rotates, the annular synchronous belt 62 on the supporting cylinder 61 is driven to rotate, when the annular synchronous belt 62 is in engagement with the synchronous pulley 64, the plurality of synchronous pulleys 64 are driven to rotate at the same time, the plurality of connecting shafts 63 are driven to rotate by the plurality of synchronous pulleys 64 respectively, the knife handle 4 is driven to rotate by the connecting shaft 63, the rotary tillage knife 5 is driven to rotate by the knife handle 4, the angle of the rotary tillage knife 5 is turned over, and the rotary tillage knife 5 is turned over from the left side to the right side or from the right side to the left side, so that the adjustment of the earth throwing direction can be completed when turning around, so that the soil is prevented from being thrown to the wrong side, so that the continuous ditch or ridge can be formed, and the work efficiency is improved. The synchronous adjusting assembly 6 further comprises the first motor 65, the first motor 65 is mounted on the front side inner wall of the connecting cylinder 2, the output end of the first motor 65 is provided with the transmission gear 66, the inner wall of the supporting cylinder 61 is provided with the gear ring 67, the transmission gear 66 is in movable engagement with the outer surface of the gear ring 67, and specifically, the first motor 65 is controlled to rotate by the user, the first motor 65 drives the transmission gear 66 to rotate and drives the gear ring 67 to rotate, so that the supporting cylinder 61 is driven to rotate. The rotary tillage knives 5 outside the two connecting cylinders 2 in the same group are arranged in a staggered mode, specifically, as shown in Figure 10 The rotary tillage knives 5 in the same group are arranged in a staggered mode, the solid line represents one group, and the dotted line represents another group, so that the soil can be discharged from the corresponding gaps of the two rotary tillage knives 5 when throwing the soil, and the rotary tillage knives 5 are prevented from being blocked when throwing the soil. The inner wall of the connecting cylinder 2 is provided with the storage battery, the storage battery is electrically connected with the first motor 65, specifically, the storage battery provides the required electric energy for the first motor 65, and the storage battery can rotate with the connecting cylinder 2, the storage battery and the first motor 65 are kept in a relative rotating state, the wiring between the storage battery and the first motor 65 is facilitated, and the wire is prevented from being wound when the rotary shaft 1 rotates. The rotation angle of the rotary blade 5 can be accurately controlled by an angle sensor, and the target angle rotation instruction is received by the control system; the control system outputs a driving signal to drive the first motor 65 to work; the angle sensor collects the actual rotation angle of the connecting shaft 63 in real time and transmits an analog signal or a digital signal to the control system; the control system compares the target angle with the actual angle, calculates the deviation value, adjusts the driving parameters of the first motor 65 according to the deviation value, and stops or keeps positioning the first motor 65 until the deviation between the actual angle and the target angle is less than the allowable range, so that the rotation angle of the connecting shaft 63 can be accurately adjusted, and the rotation angle of the rotary blade 5 can be adjusted. Embodiment 3: please refer to Figures 1-9 The present application provides a technical scheme: the side of the handle 4 towards the connecting barrel 2 is connected with a mounting block, the side of the connecting shaft 63 towards the handle 4 is provided with a mounting groove, the mounting block is movably inserted into the mounting groove, and the outer surface of the rotating barrel 3 is threaded through with a bolt, and the mounting block is threadedly connected in the mounting groove through the bolt, specifically, the handle 4 is mounted in the connecting shaft 63 by inserting the mounting block into the mounting groove, and the mounting block and the connecting shaft 63 are connected through the bolt, the bolt is removed, and the mounting block is pulled out of the mounting groove, so that the rotary blade 5 can be replaced when it is worn out.
[0026] Embodiment 4: please refer to Figures 1-9 The present application provides a technical scheme: the front end of the ditcher 7 is rotatably connected with a supporting shaft 73, the outer surface of the supporting shaft 73 is sleeved with two connecting frames 71, and the rotating shaft 1 is rotatably connected between the two connecting frames 71, one of the connecting frames 71 is provided with a second motor 72, and the output end of the second motor 72 is connected with the rotating shaft 1, specifically, when the ditching work is performed, the rotating shaft 1 is driven to rotate by the second motor 72, the rotating shaft 1 drives the rotary blade 5 on it to rotate, and the land is ditched by the rotary blade 5.
[0027] Embodiment 5: please refer to Figures 1-9 The present application provides a technical scheme: the lower side of the ditcher 7 is provided with a driving assembly 8, the supporting shaft 73 is driven to rotate by the driving assembly 8, so as to drive the rotary blade 5 to move up and down, and the driving assembly 8 comprises a third motor 81 mounted on the bottom of the ditcher 7, a driving gear 82 sleeved with the output end of the third motor 81, a driven gear 83 sleeved with the outer surface of the supporting shaft 73, and the outer surfaces of the driving gear 82 and the driven gear 83 are movably engaged, specifically, the third motor 81 is driven to rotate by the third motor 81, the driving gear 82 drives the driven gear 83 to rotate, the driven gear 83 drives the supporting shaft 73 to rotate, the connecting frame 71 is rotated, when the connecting frame 71 moves downward, the rotary blade 5 is in contact with the ground, and when the connecting frame 71 moves upward, the rotary blade 5 is in a suspended state with the ground.
[0028] Based on the above embodiments, the following is the complete working principle of the above embodiments: In use, first start the ditcher 7; control the drive component 8 below the ditcher 7 to start the third motor 81. The third motor 81 drives the drive gear 82 to rotate, and the drive gear 82 meshes with and drives the driven gear 83, thereby driving the support shaft 73 to rotate; when the support shaft 73 rotates, the connecting frame 71 on it flips downwards until the rotary tiller blades 5 on the rotating shaft 1 between the connecting frames 71 contact the ground, and the third motor 81 stops, completing the depth positioning before ditching; Next, the second motor 72 on the outer surface of the connecting frame 71 is started. The second motor 72 drives the rotating shaft 1 to rotate, and the rotating shaft 1 drives the two externally sleeved connecting cylinders 2 to rotate synchronously. When the connecting cylinder 2 rotates, the rotating cylinder 3 connected to it rotates together. The rotary tiller 5 at the end of the blade handle 4 inside the rotating cylinder 3 contacts the ground and cuts the soil by rotating. At the same time, because the rotary tiller 5 outside the two connecting cylinders 2 in the same group are staggered, the cut soil is smoothly thrown out from the gap of the rotary tiller 5 to form the initial trench. The trencher 7 moves forward and continues to complete the straight trenching. When the trencher 7 needs to turn around and travel in reverse, the third motor 81 is started, causing the support shaft 73 to rotate in the opposite direction. The connecting frame 71 flips upward, and the rotary tiller 5 is lifted off the ground and suspended in the air. Then, the synchronization adjustment component 6 is started: the battery supplies power to the first motor 65, which drives the transmission gear 66 at the output end to rotate. The transmission gear 66 meshes with the gear ring 67 on the inner wall of the support cylinder 61, causing the support cylinder 61 to rotate inside the connecting cylinder 2. When the support cylinder 61 rotates, the annular synchronous belt 62 on its front outer surface rotates accordingly. 2. The meshing drives the synchronous pulleys 64 on multiple connecting shafts 63, causing all connecting shafts 63 to rotate synchronously; the connecting shafts 63 drive the handle 4 to rotate, and the handle 4 drives the rotary tiller 5 to rotate, changing from throwing soil to throwing soil to the right, or vice versa. During this process, the angle sensor collects the actual rotation angle of the connecting shafts 63 in real time and transmits the signal to the control system. The control system compares the target angle with the actual angle and adjusts the drive parameters of the first motor 65 until the angle deviation of the rotary tiller 5 is less than the allowable range, at which point the first motor 65 is stopped, and the synchronous adjustment of the soil throwing direction is completed. After the soil-throwing direction is adjusted, the ditcher 7 reverses direction and restarts the second motor 72 to drive the rotating shaft 1 to rotate. The rotary tiller blades 5 cut the soil in the new soil-throwing direction to prevent soil from being thrown into the already worked or unworked areas, thus avoiding the formation of continuous furrows or ridges. If the rotary tiller blades 5 wear out during operation, the machine can be stopped, the bolts between the mounting block and the connecting shaft 63 can be removed, the mounting block can be pulled out of the mounting slot, a new rotary tiller blade 5 can be replaced, and the machine can be reassembled to continue operation. After the operation is completed, the third motor 81 is restarted to make the support shaft 73 rotate in the opposite direction, the connecting frame 71 flips upward, the rotary tiller blades 5 are lifted off the ground and suspended in the air, all motors are turned off, and the operation process is completed.
[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.
Claims
1. An energy-saving seeding and furrowing device comprising a furrower (7) and a plurality of furrowing assemblies, characterized in that: The ditching assembly comprises a rotating shaft (1) and two connecting barrels (2), both of which are sleeved on the outside of the rotating shaft (1), the outer surface of the rotating barrel (3) is provided with a plurality of rotating barrels (3) in a circumferential array, the rotating barrel (3) is rotatably connected to the outside of the connecting barrel (2), the inside of the rotating barrel (3) is provided with a rotary tillage assembly, and the inside of the rotating barrel (3) is provided with a synchronous adjusting assembly (6), which synchronously drives a plurality of rotary tillage assemblies to rotate.
2. The energy-saving seeding furrow opener according to claim 1, characterized in that: The rotary tillage assembly comprises a knife handle (4) rotatably connected to the inside of the rotating barrel (3), and a rotary tillage knife (5) mounted at the other end of the plurality of knife handles (4).
3. The energy-saving seeding furrow opener according to claim 2, characterized in that: The synchronous adjusting assembly (6) comprises a connecting shaft (63) arranged on the side of the knife handle (4) facing the connecting barrel (2), and the connecting shaft (63) extends to the inside of the connecting barrel (2).
4. The energy-saving seeding furrow opener according to claim 3, characterized in that: The synchronous adjusting assembly (6) further comprises a support barrel (61) rotatably connected to the inside of the connecting barrel (2), an annular synchronous belt (62) mounted on the front side outer surface of the support barrel (61), a synchronous belt pulley (64) mounted on one side of the connecting shaft (63) in the inside of the connecting barrel (2), and a plurality of synchronous belt pulleys (64) movably engaged with the outer surface of the annular synchronous belt (62).
5. The energy-saving seeding furrow opener according to claim 4, characterized in that: The synchronous adjusting assembly (6) further comprises a first motor (65) mounted on the front side inner wall of the connecting barrel (2), a transmission gear (66) mounted on the output end of the first motor (65), a gear ring (67) mounted on the inner wall of the support barrel (61), and the transmission gear (66) movably engaged with the outer surface of the gear ring (67).
6. The energy-saving seeding furrow opener according to claim 2, characterized in that: The rotary tillage knives (5) on the outside of the two connecting barrels (2) in the same group are arranged in a staggered manner.
7. The energy-saving seeding furrow opener according to claim 4, characterized in that: The side of the knife handle (4) facing the connecting barrel (2) is connected with a mounting block, the side of the connecting shaft (63) facing the knife handle (4) is provided with a mounting groove, the mounting block is movably inserted into the mounting groove, and the outer surface of the rotating barrel (3) is threaded through a bolt, and the mounting block is threadedly connected to the inside of the mounting groove through the bolt.
8. The energy-saving seeding furrow opener of claim 5, wherein: The inner wall of the connecting barrel (2) is provided with a storage battery, and the storage battery is electrically connected with the first motor (65).
9. The energy-saving seeding furrow opener of claim 1, wherein: The front end of the ditcher (7) is rotatably connected with a support shaft (73), the outer surface of the support shaft (73) is sleeved with two connecting frames (71), the rotating shaft (1) is rotatably connected between the two connecting frames (71), one of the connecting frames (71) is provided with a second motor (72), and the output end of the second motor (72) is connected with the rotating shaft (1).
10. The energy-saving seeding and furrowing device according to claim 9, characterized in that: The ditcher (7) is provided below with a driving assembly (8), which drives the rotation of the support shaft (73), so as to drive the rotary tiller (5) to move up and down, the driving assembly (8) comprises a third motor (81) installed at the bottom of the ditcher (7), the output end of the third motor (81) is provided with a driving gear (82), the outer surface of the support shaft (73) is provided with a driven gear (83), and the driving gear (82) is in movable engagement with the outer surface of the driven gear (83).