Coaxial reverse transmission mechanism

Abstract

The utility model discloses a coaxial reverse transmission mechanism which comprises a transmission assembly, a shaft is arranged on the transmission assembly and penetrates through the two sides of the transmission assembly, rotary tillage cutters are arranged at the two ends of the shaft respectively, and a first cutter fixing shaft and a second cutter fixing shaft are arranged at the joints of the two sides of the transmission assembly and the shaft respectively. Rotary tillage cutters are respectively arranged on the first cutter fixing shaft and the second cutter fixing shaft; the upper side of the transmission assembly is connected with a driving shaft, and the driving shaft is used for driving the rotary tillage cutters on the left side and the right side of the transmission assembly to achieve coaxial forward and reverse rotation operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical transmission, and in particular relates to a coaxial reverse transmission mechanism. Background Art

[0002] Generally speaking, the blades of a rotary tiller can rotate clockwise (forward) or counterclockwise (reverse).

[0003] Forward (clockwise): When the rotary tiller blade rotates clockwise, the cutting and flipping action of the blade can break up the soil and throw it backwards, thus achieving the purpose of deep tillage and loosening the soil. This rotation method is suitable for most soil types and farming conditions, especially in fertile soil.

[0004] Reverse (counterclockwise): In some cases, such as poor soil or crop planting areas that need to conserve soil nutrients, reverse rotary tiller blades may be more appropriate. Reverse blades can retain nutrients and moisture on the surface of the soil, reducing soil erosion and loss. In addition, reverse blades can also reduce the compaction of the blades on the soil to a certain extent, which is beneficial to soil ventilation and drainage.

[0005] The existing micro-tillage machine cutter rotates in a single direction at high speed, just like the tires of a car, with strong traction and adhesion. Therefore, the existing micro-tillage machine needs to add a damping rod to be inserted into the soil for manual control during operation to damp and slow down the forward speed of the rotary tiller, thereby controlling the depth of tillage. The damping rod produces a lot of useless work for this purpose, increases a lot of fuel consumption losses, and once it is out of hand, the machine will fly out uncontrollably, causing the operation to stall, posing a great safety hazard.

[0006] In addition, one-way rotary tillage is greatly affected by the hardness of the soil. It is difficult to till deep into hard soil. It is necessary to stay in the same place for more time to fully till the soil to reach the operating depth. At the same time, there will be great vibrations and machine bounces, and sometimes the knife will jump, which increases the labor intensity and fatigue of the workers. Moreover, many clods of soil are left behind by the rotary tillage cutter before they are broken up, which is not conducive to crop planting. Even when working on soil with normal hardness, the depth of rotary tillage will depend on the time spent at the location, because it is impossible to control the time equally by humans, and the hardness of the soil in different areas of the same plot is also different, resulting in uneven soil after rotary tillage, uneven rotary tillage depth, and not conducive to subsequent crop planting. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide a coaxial reverse transmission mechanism for solving the problems that the existing micro-tillage machinery is greatly affected by the hardness of the soil, bounces and vibrates, the knife jumps, the tillage depth is uneven, the labor intensity of the operators is high, the soil after tillage is uneven and there are many clods which are not conducive to planting, the damping rod produces a lot of useless work, thereby increasing fuel consumption and causing energy waste, and the machine is easy to fly out of the hands during operation, causing safety hazards.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] A coaxial reverse transmission mechanism comprises a transmission assembly, wherein a shaft is arranged on the transmission assembly, the shaft passes through both sides of the transmission assembly, rotary tillage tools are arranged at both ends of the shaft, a first tool fixing shaft and a second tool fixing shaft are arranged at the connection between the two sides of the transmission assembly and the shaft, and rotary tillage tools are arranged on the first tool fixing shaft and the second tool fixing shaft respectively; a driving shaft is connected to the upper side of the transmission assembly, and the driving shaft is used to drive the rotary tillage tools on the left and right sides of the transmission assembly to realize coaxial forward and reverse rotation operation.

[0010] Preferably, the transmission assembly includes an active bevel gear, which is connected to one end of the driving shaft, and the two sides of the active bevel gear are respectively meshed and connected with the first driven bevel gear and the second driven bevel gear, the first driven bevel gear is connected to the first tool fixing shaft through the active spur gear, and the active spur gear is connected to the second tool fixing shaft on the other side of the transmission assembly through the transition shaft and the driven spur gear.

[0011] More preferably, the driven spur gear and the driving spur gear are connected to the transition shaft through auxiliary transmission gears respectively.

[0012] More preferably, the driven spur gear, the second driven bevel gear, the driving spur gear and the first driven bevel gear are respectively mounted on the shaft.

[0013] More preferably, the second driven bevel gear is rigidly connected to the shaft.

[0014] More preferably, the driven spur gear is rigidly connected to the second tool fixing shaft.

[0015] More preferably, the driving spur gear and the driven bevel gear are rigidly connected.

[0016] More preferably, the first tool fixing shaft and the second tool fixing shaft are respectively mounted on the shaft.

[0017] More preferably, the driven bevel gear is rigidly connected to the first tool fixing shaft via a driving spur gear.

[0018] Preferably, the transmission assembly is arranged inside the assembly housing.

[0019] Compared with the prior art, the utility model has at least the following beneficial effects:

[0020] The utility model is a coaxial reverse transmission mechanism, which is provided with a transmission box. The power torque is transmitted from the driving shaft extending to the outside of the box body to the driving bevel gear inside the box body. The driving bevel gear drives two driven bevel gears with the same parameters at the same time. The two driven bevel gears are symmetrically installed on both sides of the driving bevel gear and rotate around the same axis, thereby realizing the transmission of power torque in both positive and negative directions. One of the driven bevel gears is rigidly connected to the power output shaft, and the two ends of the shaft extend to the outside of the transmission box body respectively. The parts extending from the left and right side shafts are provided with rotating tools, thereby realizing the torque transmission of the rotating tools on both sides of the transmission box in the forward direction. Another driven bevel gear is rigidly connected to the driving spur gear and the first tool fixed shaft, and is sleeved on the power output shaft. One end of the first tool fixed shaft extends to the outside of the transmission box. The torque from the driven bevel gear enables the rotating tool on the first tool fixed shaft to rotate in the opposite direction, thereby realizing the torque transmission in the reverse direction of the transmission box side. The active spur gear transmits the torque to the driven spur gear through the gear on the transition shaft. The driven spur gear is rigidly connected to the second tool fixing shaft and is mounted on the power output shaft. One end of the second tool fixing shaft extends to the other side of the transmission box. The torque from the driven spur gear is transmitted to the rotating tool on the second tool fixing shaft, realizing the torque transmission in the reverse direction on the other side of the transmission box. As a result, the rotating tool of the power output shaft and the rotating tools of the first and second tool fixing shafts perform coaxial reverse motion with the power output shaft as the axis; making the micro-tillage machine more comfortable to operate during rotary tillage, with higher stability, improved control safety and reduced labor intensity, making it more suitable for aging farmers to operate, the soil after rotary tillage is smoother and softer, the rotary tillage depth is controllable and uniform, and the fuel consumption is reduced, which greatly improves the fuel economy.

[0021] Furthermore, bevel gear transmission is a transmission mode with high transmission efficiency and is widely used due to its strong stability. One active bevel gear drives the other two driven bevel gears to transmit torque coaxially and in reverse, making the transmission mechanism more compact, more reliable, smaller in size, and saving material costs. The active spur gear transmits torque to the driven spur gear through the transition shaft in order to complete the speed synchronization and torque transmission of the coaxial sleeves on both sides of the transmission box, which plays a decisive role in the torque balance on both sides of the transmission box, making the transmission box run more smoothly and the stress distribution of the working parts more uniform.

[0022] Furthermore, the driven bevel gear, the active spur gear and the first tool fixed shaft are rigidly connected, the drive shaft and the active bevel gear are rigidly connected, the driven spur gear and the second tool fixed shaft are rigidly connected, the driven bevel gear and the power output shaft are rigidly connected, and the transition shaft and the auxiliary transmission gear are rigidly connected. The rigid connection is to reduce the transmission clearance, reduce the transmission noise, increase the service life of each operating component, reduce fatigue damage, and effectively improve the transmission efficiency, making the transmission operation smoother.

[0023] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the structure of the utility model.

[0026] Among them: 1. Transmission assembly; 2. Driving shaft; 3. Driven spur gear; 4. Auxiliary transmission gear; 5. Second driven bevel gear; 6. Transition shaft; 7. First tool fixing shaft; 8. Assembly housing; 9. Shaft; 10. Active bevel gear; 11. Active spur gear; 12. First driven bevel gear; 13. Second tool fixing shaft. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to another component, or there may be several components at the same time. Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as those generally understood by technicians in the technical field of the utility model. It should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0028] It should also be noted that in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0029] See also Figure 1 The utility model discloses a coaxial reverse transmission mechanism, including a transmission assembly 1, a driving shaft 2, a driven spur gear 3, a secondary transmission gear 4, a driven bevel gear 5, a transition shaft 6, a first tool fixing shaft 7, an assembly housing 8, a shaft 9, an active bevel gear 10, an active spur gear 11, a driven bevel gear 12 and a second tool fixing shaft 13.

[0030] One end of the driving shaft 2 is connected to the active bevel gear 10, and the two ends of the active bevel gear 10 are respectively meshed and connected to the first driven bevel gear 12 and the second driven bevel gear 5. The first driven bevel gear 12 is sleeved and connected to the shaft 9, and moves relative to the shaft 9. The second driven bevel gear 5 is connected to the shaft 9, and the two ends of the shaft 9 are respectively sleeved and connected to the first tool fixing shaft 7 and the second tool fixing shaft 13;

[0031] The first tool fixing shaft 7 is connected to the first driven bevel gear 12 through the driving spur gear 11, the driving spur gear 11 is connected to one end of the transition shaft 6 through the auxiliary transmission gear 4, and the other end of the transition shaft 6 is connected to the second tool fixing shaft 13 through the driven spur gear 3.

[0032] The driving shaft 2, the active bevel gear 10, the first driven bevel gear 12, the second driven bevel gear 5, the driven spur gear 3, the active spur gear 11, the auxiliary transmission gear 4 and the transition shaft 6 together constitute a transmission assembly 1. The first tool fixing shaft 7 and the second tool fixing shaft 13 on the left and right sides of the transmission assembly 1, and the two ends of the shaft 9 are respectively provided with working tools. The second driven bevel gear 5 provides a power torque in the forward rotation direction for the working tool on the shaft 9 to realize the forward rotation operation of the tool; the first driven bevel gear 12 drives the active spur gear 11 and the driven spur gear 3 to provide a reverse rotation power torque for the working tool on the corresponding first tool fixing shaft 7 and the second tool fixing shaft 13 respectively to realize the reverse rotation operation of the tool, so that the rotary tillage tools on the left and right sides of the transmission assembly 1 can realize coaxial forward and reverse rotation operation.

[0033] The driven bevel gear 12 , the driving spur gear 11 and the first tool fixing shaft 7 are rigidly connected and move relative to each other with the shaft 9 as the axis. The driven bevel gear 5 is rigidly connected to the shaft 9 and moves synchronously with the shaft 9 .

[0034] The driven spur gear 3 is rigidly connected to the second tool fixing shaft 13 and moves relative to each other with the shaft (9) as the axis.

[0035] The driven bevel gear 12 , the driven spur gear 3 and the driving spur gear 11 are respectively mounted on the shaft 9 .

[0036] The working principle of the coaxial reverse transmission mechanism of the utility model is as follows:

[0037] The power is transmitted to the active bevel gear 10 by the driving shaft 2, and the active bevel gear 10 transmits the torque to the driven bevel gear 5 and the driven bevel gear 12 at the same time, and drives the driven bevel gear 5 and the driven bevel gear 12 to rotate in opposite directions;

[0038] The driven bevel gear 5 is rigidly connected to the shaft 9, producing co-directional and coaxial operation; the driven bevel gear 12 is sleeved on the shaft 9 and moves relative to the shaft 9 as the axis, producing reverse coaxial operation;

[0039] The driven bevel gear 5 provides a power torque in a positive rotation direction to the working tool on the shaft 9, so that the tool can be rotated in a positive direction.

[0040] The driven bevel gear 12 is rigidly connected to the first tool fixing shaft 7 through the driving spur gear 11, and moves relative to the shaft 9 as the axis, thereby providing a power torque in the reverse direction for the working tool on the first tool fixing shaft 7, realizing the tool reverse rotation operation.

[0041] The driving spur gear 11 and the driven bevel gear 12 are rigidly connected. The driving spur gear 11 transmits power to the auxiliary transmission gear 4. The auxiliary transmission gear 4 transmits the power torque to the driven spur gear 3 through the transition shaft 6. The driven spur gear 3 moves relative to the shaft 9 and is rigidly connected to the second tool fixing shaft 13, thereby providing a reverse rotation power torque for the working tool on the second tool fixing shaft 13, so that the rotary tilling tools on the left and right sides of the transmission assembly 1 can realize coaxial forward and reverse rotation operations.

[0042] In summary, the coaxial reverse transmission mechanism of the utility model has the following characteristics:

[0043] 1. Improved operational safety and reduced labor intensity of control

[0044] The reverse rotation of the cutter perfectly offsets the forward thrust caused by the forward rotation. The rotary tiller can work stably in place without hand support and there is no need to worry about the machine flying out of the hand. It also effectively overcomes the excessive bouncing and vibration of the micro-tillage machines currently on the market, reduces the labor intensity of operation, and is more in line with the current rotary tillage operation needs of the aging domestic farmers, making operation easier and safer.

[0045] 2. Reduced fuel consumption

[0046] The reverse rotation of the cutter perfectly offsets the forward thrust caused by the forward rotation. There is no need to drag the damping rod to control the forward speed of the rotary tiller. The fuel originally consumed by the damping rod can be fully used for land rotary tillage, increasing fuel efficiency and reducing fuel consumption.

[0047] 3. The soil produced by rotary tillage is softer and more uniform

[0048] Coaxial forward and reverse rotating cutters can greatly reduce the situation where soil clods that have not yet been broken up by a single forward rotating cutter are moved to the back. The reverse rotating cutter will push the soil clods forward, generating interaction forces in the gap between the forward and reverse rotating cutters, causing the soil clods to stay between the cutters for a longer time, breaking up the soil clods into uniform soil.

[0049] 4. The soil produced by rotary tillage is flatter

[0050] The reason is similar to the previous one. The soil becomes easier to break up due to the shearing action of the forward and reverse rotating cutters, and the soil will stay between the cutters for a longer time instead of being easily dug to the back like a single forward rotating cutter. The land tilled by rotary tillage will be flatter.

[0051] 5. The depth of the soil tilled by rotary tillage can be controlled and uniform

[0052] Since the phenomenon of rotary tillage blade jumping is greatly reduced, the rotary tiller runs more smoothly and is easier to control. In normal rotary tillage operations, the working trajectory of the positive rotary cutter is to cut the soil surface and rotate downward and backward, while the working trajectory of the reverse rotary cutter is to cut the soil fault plane and rotate forward and upward. Generally speaking, the degree of soil compaction is that the upper layer is hard and the lower layer is relatively soft. The working load of the positive rotary cutter is first hard and then soft, and the working load of the reverse rotary cutter is first soft and then hard. The two cutters rotate in opposite directions, like a pair of pliers, firmly grasping the harder part of the soil and shearing and breaking it, thereby increasing the ground adhesion of the rotary tiller, effectively reducing the bouncing and vibration phenomenon of the rotary tiller, making the rotary tiller operate steadily, and the rotary tillage depth is more controllable and uniform.

[0053] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A coaxial reverse transmission mechanism, characterized in that: The invention comprises a transmission assembly (1), wherein a shaft (9) is arranged on the transmission assembly (1), the shaft (9) penetrates through both sides of the transmission assembly (1), and rotary tillage tools are arranged at both ends of the shaft (9), and a first tool fixing shaft (7) and a second tool fixing shaft (13) are arranged at the connection between the two sides of the transmission assembly (1) and the shaft (9), and rotary tillage tools are arranged on the first tool fixing shaft (7) and the second tool fixing shaft (13); and a driving shaft (2) is connected to the upper side of the transmission assembly (1), and the driving shaft (2) is used to drive the rotary tillage tools on the left and right sides of the transmission assembly (1) to realize coaxial forward and reverse rotation operation.

2. The coaxial reverse transmission mechanism according to claim 1, characterized in that: The transmission assembly (1) comprises a driving bevel gear (10), the driving bevel gear (10) being connected to one end of a driving shaft (2), the two sides of the driving bevel gear (10) being respectively meshed with a first driven bevel gear (12) and a second driven bevel gear (5), the first driven bevel gear (12) being connected to a first tool fixing shaft (7) via a driving spur gear (11), and the driving spur gear (11) being connected to a second tool fixing shaft (13) on the other side of the transmission assembly (1) via a transition shaft (6) and a driven spur gear (3).

3. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The driven spur gear (3) and the driving spur gear (11) are respectively connected to the transition shaft (6) through the auxiliary transmission gear (4).

4. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The driven spur gear (3), the second driven bevel gear (5), the driving spur gear (11) and the first driven bevel gear (12) are respectively mounted on the shaft (9).

5. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The second driven bevel gear (5) is rigidly connected to the shaft (9).

6. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The driven spur gear (3) is rigidly connected to the second tool fixing shaft (13).

7. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The driving spur gear (11) and the driven bevel gear (12) are rigidly connected.

8. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The first tool fixing shaft (7) and the second tool fixing shaft (13) are respectively sleeved on the shaft (9).

9. The coaxial reverse transmission mechanism according to claim 2, characterized in that: The driven bevel gear (12) is rigidly connected to the first tool fixing shaft (7) via the driving spur gear (11).

10. The coaxial reverse transmission mechanism according to claim 1, characterized in that: The transmission assembly (1) is arranged inside the assembly housing (8).

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