Mini-tiller gearbox for modification

Abstract

The utility model discloses a refitted mini-tiller gearbox, which belongs to the technical field of power gear shifting speed change output and comprises a box body, a shaft is rotatably connected to the top end of the box body, a rectangular key shaft is rotatably connected to the middle of the box body, a meter key shaft and a clamping shaft are arranged on two sides of the rectangular key shaft, a clutch shaft is rotatably connected to one side of the box body, and the clutch shaft is rotatably connected to the other side of the box body. One end of the box body is rotationally connected with a plurality of hexagonal half shafts, the hexagonal half shafts are rotationally connected with one another, a lower box is installed at the end, away from the hexagonal half shafts, of the box body, and a hexagonal shaft is rotationally connected to the end, away from the box body, of the lower box. An original two-drive mode is changed into a four-drive mode, gears are increased, the output rotating speed is adjusted, a forced steering function is added, operation is convenient, the failure rate is low, maintenance is convenient, the service life is long, meanwhile, a large number of original parts are used, and cost is reduced for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of power shifting and speed changing output, in particular to a gearbox for a modified micro-tillage machine. Background Art

[0002] The micro-tillage machine is powered by a small diesel engine or gasoline engine, and has the characteristics of light weight, small size and simple structure. The micro-tillage machine is widely used in dry land, paddy fields, orchards in plains, mountainous areas and hills. The micro-tillage machine can travel freely in the field, which is convenient for users to use and store, eliminating the trouble that large agricultural machinery cannot enter mountain fields. It is the best choice for farmers and consumers to replace ox-plowing.

[0003] Due to historical reasons, there are a large number of old-style micro-tillage machines on the market. These micro-tillage machines are two-wheel drive structures with low speeds. Due to structural problems, they are extremely difficult to operate and have low efficiency. If they are replaced with new ones, it will cause great waste and the cost of replacement will be very high. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the operation is extremely difficult and the efficiency is very low due to the structural problem. If a new machine is replaced, it will cause great waste and the replacement cost is very high.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: a modified micro-tiller gearbox, including a box body, a shaft is rotatably connected to the top of the box body, a rectangular key shaft is rotatably connected to the middle of the box body, a key shaft and a card shaft are arranged on both sides of the rectangular key shaft, a clutch shaft is rotatably connected to one side of the box body, a plurality of hexagonal semi-shafts are rotatably connected to one end of the box body, and the plurality of hexagonal semi-shafts are rotatably connected to each other, a lower box is installed at one end of the box body away from the hexagonal semi-shafts, and the lower box is rotatably connected to the hexagonal shaft at one end away from the box body.

[0006] The utility model is further configured as follows: the bottom end of the first shaft is fixedly connected to the first bevel gear, one end of the rectangular key shaft is fixedly connected to the second bevel gear, the second bevel gear is meshingly and transmission-connected with the first bevel gear, the end of the rectangular key shaft away from the second bevel gear is fixedly connected to the first gear, the middle part of the rectangular key shaft is slidably connected to a gear, the middle part of the gear gear is rotatably connected to the first shift fork, the end of the first shift fork away from the gear gear is penetrated and fixedly connected to a shift rod shaft, and one end of the shift rod shaft is penetrated and slidably connected to the box body.

[0007] Through the above technical solution, by pulling a gear lever shaft, the first gear gear is moved and meshed with different transmission gears to switch between multiple gears, which is easy to operate.

[0008] The utility model is further configured as follows: a second gear is fixedly connected to the middle of the rice key shaft, a third gear is arranged on one side of the second gear, the middle of the third gear is fixedly connected to the rice key shaft, a second gear is arranged on the side of the third gear away from the second gear, the middle of the second gear is fixedly connected to the rice key shaft, and the first gear is slidably meshed with the second gear and the second gear.

[0009] The utility model is further configured such that a fourth gear is fixedly connected to the middle of the clutch shaft, the fourth gear is meshingly connected to the third gear, tooth grooves are arranged at the centers of both sides of the fourth gear, clutch gears are installed on both sides of the fourth gear, and the clutch gears are meshingly connected to both sides of the fourth gear.

[0010] Through the above technical solution, the steering shaft is rotated, and the steering fork pushes the clutch gear to engage or disengage with the tooth groove on one side of the fourth gear, thereby realizing the forced steering function, making the operation convenient and the failure rate low.

[0011] The utility model is further configured as follows: a plurality of the hexagonal half shafts are fixedly connected with a fifth gear at one end close to each other, the fifth gear is meshed with the clutch gear for transmission connection, the clutch gear is fixedly connected with a clutch groove at the side away from the fourth gear, a steering fork is rotatably provided in the middle of the clutch groove, a steering shaft is fixedly connected through the top end of the steering fork, and one end of the steering shaft is rotatably connected to the box body.

[0012] Through the above technical solution, the original two-wheel drive is changed to a four-wheel drive mode, and the gears are increased, which greatly increases the functionality of the gearbox and expands the application scenarios.

[0013] The utility model is further configured as follows: a sixth gear is fixedly connected to the middle portion of the card shaft, a seventh gear is installed on one side of the sixth gear, the middle portion of the seventh gear is slidably connected to the card shaft, one side of the seventh gear is meshingly transmission connected to the first gear, one side of the seventh gear is rotatably connected to the second shift fork, the top end of the second shift fork is fixedly connected to the second gear rod shaft, and the second gear rod shaft is slidably connected to the box body at one end away from the second shift fork.

[0014] Through the above technical solution, the second gear lever shaft pushes the second shift fork to move to switch to the second gear, thereby adjusting the output speed and making the operation more flexible and convenient.

[0015] The utility model is further configured as follows: the lower box includes a gear lower box and a plurality of ninth gears, the plurality of ninth gears are arranged in an array, the ninth gears are meshingly connected to each other, the middle parts of the plurality of ninth gears are fixedly connected with a transmission shaft, the transmission shaft is rotatably connected with the gear lower box, a piece of the ninth gear near the card shaft is meshingly connected to the sixth gear, the middle part of the sixth gear is slidably connected with the card shaft, a piece of the ninth gear near the hexagonal shaft is meshingly connected to the eighth gear, and both sides of the middle part of the eighth gear are fixedly connected to the hexagonal shaft.

[0016] Through the above technical solution, through the mutual cooperation of multiple ninth gears, high torque transmission is achieved, the transmission efficiency and reliability are improved, and the transmission of the gearbox is made more stable.

[0017] The utility model is further configured as follows: the lower box includes a chain lower box and a chain, the chain is located inside the chain lower box, the chain is meshingly connected to a first sprocket on one side close to the box body, the middle of the first sprocket is slidably connected to a card shaft, the other side of the chain is meshingly connected to a second sprocket, and the center of the second sprocket is fixedly connected to the hexagonal shaft on both sides.

[0018] Through the above technical solution, the chain drive is used, which can withstand larger loads and torques and is suitable for occasions requiring high torque transmission. The chain drive is stable when working and has little vibration during power transmission, which is beneficial to reducing wear and noise of mechanical parts.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model changes the original two-wheel drive into a four-wheel drive mode, increases gears, adjusts the output speed, and adds a forced steering function, making the operation easy, the failure rate low, the maintenance convenient, and the service life long. At the same time, the machine uses a large number of original components, which reduces costs for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the box of the utility model;

[0024] Figure 4 This is a schematic diagram of the first gear structure of the utility model;

[0025] Figure 5 It is a three-dimensional schematic diagram of the shifting structure of the utility model;

[0026] Figure 6 It is a three-dimensional schematic diagram of the steering structure of the utility model;

[0027] Figure 7 This is a three-dimensional schematic diagram of the internal structure of the first embodiment of the utility model;

[0028] Figure 8 It is a three-dimensional schematic diagram of the internal structure of the second embodiment of the present utility model.

[0029] In the figure: 1, housing; 2, first shaft; 201, first bevel gear; 3, rectangular key shaft; 301, first gear; 302, first gear; 303, second bevel gear; 304, first shift fork; 305, first gear lever shaft; 4, key shaft; 401, second gear; 402, third gear; 403, second gear; 5, clutch shaft; 501, fourth gear; 502, tooth groove; 503, clutch gear; 504, clutch groove ; 505, steering fork; 506, steering shaft; 6, hexagonal half shaft; 601, fifth gear; 7, clamping shaft; 701, sixth gear; 702, seventh gear; 703, first sprocket; 8, lower box; 9, gear lower box; 10, chain lower box; 11, hexagonal shaft; 1101, eighth gear; 1102, second sprocket; 12, transmission shaft; 13, ninth gear; 14, second gear lever shaft; 15, second fork; 16, chain. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] Embodiment 1:

[0032] See also Figure 1 - Figure 7 A gearbox for a modified micro-tiller comprises a box body 1, a shaft 2 is rotatably connected to the top of the box body 1, a rectangular key shaft 3 is rotatably connected to the middle of the box body 1, a key shaft 4 and a card shaft 7 are arranged on both sides of the rectangular key shaft 3, a clutch shaft 5 is rotatably connected to one side of the box body 1, a plurality of hexagonal semi-shafts 6 are rotatably connected to one end of the box body 1, and the plurality of hexagonal semi-shafts 6 are rotatably connected to each other, a lower box 8 is installed at one end of the box body 1 away from the hexagonal semi-shafts 6, and a hexagonal shaft 11 is rotatably connected to the end of the lower box 8 away from the box body 1.

[0033] The bottom end of the first shaft 2 is fixedly connected with the first bevel gear 201, one end of the rectangular key shaft 3 is fixedly connected with the second bevel gear 303, the second bevel gear 303 is meshingly connected with the first bevel gear 201, the end of the rectangular key shaft 3 away from the second bevel gear 303 is fixedly connected with the first gear 301, the middle part of the rectangular key shaft 3 is slidably connected with a first gear 302, the middle part of the first gear gear 302 is connected with a first shift fork 304, the end of the first shift fork 304 away from the first gear gear 302 is penetrated and fixedly connected with a shift rod shaft 305, and one end of the shift rod shaft 305 is penetrated and slidably connected with the box body 1.

[0034] A second gear 401 is fixedly connected to the middle of the rice key shaft 4, a third gear 402 is arranged on one side of the second gear 401, the middle of the third gear 402 is fixedly connected to the rice key shaft 4, a second gear 403 is arranged on the side of the third gear 402 away from the second gear 401, the middle of the second gear 403 is fixedly connected to the rice key shaft 4, and the first gear 302 is slidably engaged with the second gear 401 and the second gear 403.

[0035] A fourth gear 501 is fixedly connected to the middle of the clutch shaft 5, and the fourth gear 501 is meshed with the third gear 402 for transmission connection. Tooth grooves 502 are arranged at the centers of both sides of the fourth gear 501, and clutch gears 503 are installed on both sides of the fourth gear 501, and the clutch gears 503 are meshed with both sides of the fourth gear 501.

[0036] A fifth gear 601 is fixedly connected to one end of a plurality of hexagonal semi-axes 6 close to each other. The fifth gear 601 is meshed with the clutch gear 503 for transmission connection. A clutch groove 504 is fixedly connected to the side of the clutch gear 503 away from the fourth gear 501. A steering fork 505 is rotatably provided in the middle of the clutch groove 504. A steering shaft 506 is fixedly connected to the top end of the steering fork 505. One end of the steering shaft 506 is rotatably provided to the housing 1.

[0037] A sixth gear 701 is fixedly connected to the middle of the card shaft 7, a seventh gear 702 is installed on one side of the sixth gear 701, the middle of the seventh gear 702 is slidably connected to the card shaft 7, one side of the seventh gear 702 is meshingly connected to the first gear 301, one side of the seventh gear 702 is rotatably connected to the second fork 15, the top of the second fork 15 is fixedly connected to the second gear lever shaft 14, and the end of the second gear lever shaft 14 away from the second fork 15 is slidably connected to the box body 1.

[0038] The lower box 8 includes a gear lower box 9 and a plurality of ninth gears 13, which are arranged in an array and meshed with each other for transmission connection. A transmission shaft 12 is fixedly connected to the middle of the plurality of ninth gears 13, and the transmission shaft 12 is rotatably connected to the gear lower box 9. A piece of the ninth gear 13 near the card shaft 7 is meshed with the sixth gear 701 for transmission connection, and the middle of the sixth gear 701 is slidably connected to the card shaft 7. A piece of the ninth gear 13 near the hexagonal shaft 11 is meshed with the eighth gear 1101 for transmission connection, and both sides of the middle of the eighth gear 1101 are fixedly connected to the hexagonal shaft 11.

[0039] Embodiment 2:

[0040] See also Figure 2 and Figure 8 The lower box 8 includes a chain lower box 10 and a chain 16. The chain 16 is located inside the chain lower box 10. The chain 16 is meshed and connected to the first sprocket 703 on one side close to the box body 1. The middle part of the first sprocket 703 is slidably connected to the through-sprocket. The other side of the chain 16 is meshed and connected to the second sprocket 1102. Both sides of the center of the second sprocket 1102 are fixedly connected to the hexagonal shaft 11. The chain 16 has a smooth transmission when working, and the vibration is small during the power transmission process, which is beneficial to reduce the wear and noise of mechanical parts.

[0041] When the utility model is in use, a shaft 2 is indirectly or directly connected to the engine power output end to transmit power, and the first gear gear 302 is moved by pulling the first gear lever shaft 305 and meshed with different transmission gears to switch multiple gears. At the same time, the second gear lever shaft 16 can push the second shift fork 17 to move to switch the second gear, thereby adjusting the output speed and making the operation more flexible and convenient, and rotating the steering shaft 506, so that the steering fork 505 pushes the clutch gear 503 to mesh or disengage with the tooth groove 502 on one side of the fourth gear 501, thereby realizing the forced steering function. At the same time, the lower box 8 can adopt two types of gear lower box 9 and chain lower box 10, and two transmission modes are set, so that the use scene of this gearbox is wider. At the same time, this gearbox changes the original two-wheel drive into a four-wheel drive mode, increases gears, and adjusts the output speed, making it easy to operate, with a low failure rate and convenient maintenance, so it has a long service life. At the same time, this machine uses a large number of original components, which reduces the cost for users and is conducive to users' procurement.

[0042] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gearbox for a modified micro-tillage machine, comprising a housing (1), characterized in that: The top of the box body (1) is rotatably connected to a shaft (2), the middle of the box body (1) is rotatably connected to a rectangular key shaft (3), both sides of the rectangular key shaft (3) are provided with a key shaft (4) and a clamping shaft (7), one side of the box body (1) is rotatably connected to a clutch shaft (5), one end of the box body (1) is rotatably connected to a plurality of hexagonal semi-shafts (6), the plurality of hexagonal semi-shafts (6) are rotatably connected to each other, a lower box (8) is installed at one end of the box body (1) away from the hexagonal semi-shafts (6), and the end of the lower box (8) away from the box body (1) is rotatably connected to a hexagonal shaft (11); The bottom end of the first shaft (2) is fixedly connected to a first bevel gear (201), one end of the rectangular key shaft (3) is fixedly connected to a second bevel gear (303), the second bevel gear (303) is meshingly connected to the first bevel gear (201), one end of the rectangular key shaft (3) away from the second bevel gear (303) is fixedly connected to the first gear (301), the middle part of the rectangular key shaft (3) is slidably connected to a gear (302), the middle part of the gear (302) is rotatably connected to a first shift fork (304), one end of the first shift fork (304) away from the gear (302) is fixedly connected to a shift lever shaft (305), and one end of the shift lever shaft (305) is slidably connected to the housing (1).

2. The gearbox for a modified micro-tillage machine according to claim 1, characterized in that: A second gear (401) is fixedly connected to the middle of the rice key shaft (4); a third gear (402) is arranged on one side of the second gear (401); a middle of the third gear (402) is fixedly connected to the rice key shaft (4); a second gear (403) is arranged on the side of the third gear (402) away from the second gear (401); a middle of the second gear (403) is fixedly connected to the rice key shaft (4); and the second gear (401) and the second gear (403) are slidably meshed with the first gear (302).

3. The gearbox for a modified micro-tillage machine according to claim 1, characterized in that: A fourth gear (501) is fixedly connected to the middle of the clutch shaft (5), and the fourth gear (501) is meshed and transmission-connected with the third gear (402). Tooth grooves (502) are arranged at the centers of both sides of the fourth gear (501), and clutch gears (503) are installed on both sides of the fourth gear (501), and the clutch gears (503) mesh with both sides of the fourth gear (501).

4. The gearbox for a modified micro-tillage machine according to claim 1, characterized in that: A fifth gear (601) is fixedly connected to one end of a plurality of the hexagonal semi-axes (6) close to each other, and the fifth gear (601) is meshed with a clutch gear (503) for transmission connection, and a clutch groove (504) is fixedly connected to the side of the clutch gear (503) away from the fourth gear (501), and a steering fork (505) is rotatably connected to the middle of the clutch groove (504), and a steering shaft (506) is fixedly connected to the top of the steering fork (505), and one end of the steering shaft (506) is rotatably connected to the box body (1).

5. The gearbox for a modified micro-tillage machine according to claim 1, characterized in that: A seventh gear (702) is fixedly connected to the middle of the clamping shaft (7), and a middle of the seventh gear (702) is slidably connected to the clamping shaft (7). One side of the seventh gear (702) is meshingly connected to the first gear (301). One side of the seventh gear (702) is rotatably connected to a second shift fork (15). A second shift lever shaft (14) is fixedly connected to the top of the second shift fork (15), and an end of the second shift lever shaft (14) away from the second shift fork (15) is slidably connected to the housing (1).

6. The gearbox for a modified micro-tillage machine according to claim 1, characterized in that: The lower box (8) comprises a gear lower box (9) and a plurality of ninth gears (13), the plurality of ninth gears (13) being arranged in an array, the ninth gears (13) being meshed and transmission-connected with each other, the middle parts of the plurality of ninth gears (13) being fixedly connected with a transmission shaft (12), the transmission shaft (12) being rotationally connected to the gear lower box (9), a portion of the ninth gear (13) close to the clamping shaft (7) being meshed and transmission-connected with a sixth gear (701), the middle part of the sixth gear (701) being slidingly connected to the clamping shaft (7), a portion of the ninth gear (13) close to the hexagonal shaft (11) being meshed and transmission-connected with an eighth gear (1101), the middle part of the eighth gear (1101) being fixedly connected to the hexagonal shaft (11) at both sides.

7. The gearbox for a modified micro-tillage machine according to claim 1, characterized in that: The lower box (8) comprises a chain lower box (10) and a chain (16), wherein the chain (16) is located inside the chain lower box (10), and the chain (16) is meshingly connected to a first sprocket (703) on one side close to the box body (1), and the middle part of the first sprocket (703) is slidably connected to a clamping shaft (7), and the other side of the chain (16) is meshingly connected to a second sprocket (1102), and the center sides of the second sprocket (1102) are fixedly connected to the hexagonal shaft (11).

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