Farming machine speed change device

Abstract

The utility model relates to the technical field of farming equipment, and particularly discloses a farming machine speed change device which comprises a gear control box body, a rotating arm set arranged in the control box body, a shifting fork connected with the rotating arm set, an operating rod connected with the control box body and used for shifting a rotating arm assembly, and a double-thread connecting piece used for installing the rotating arm assembly. The double-end threaded connecting piece is rotationally connected with the rotating arm, one end of the double-end threaded connecting piece penetrates through the outer wall of the gear control box body and is in threaded connection with a first anti-loosening nut, and the other end of the double-end threaded connecting piece penetrates through the rotating arm assembly and is in threaded connection with a second anti-loosening nut.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural equipment, and specifically discloses a speed changing device for an agricultural machine. Background Art

[0002] Farming is an indispensable part of the agricultural production process. With the development of productivity, mechanized operations are increasingly used in agricultural production. Among them, agricultural tillers are mechanized agricultural machinery that can help people dig soil trenches and assist in laying fertilizers in agricultural product planting areas. They are widely used in various aspects of farming. During the use of agricultural tillers, it is essential to switch between various gears such as forward, reverse and neutral, that is, a speed change device is required to adjust and switch the various gears of the agricultural tiller.

[0003] In the gear switching of existing agricultural machinery, an operating lever is usually used to shift the gear slot of the gear control box, thereby driving the rotating arm in the gear control box to rotate, and then driving the shift fork to move, thereby driving the speed gear to move to achieve different power output states of the agricultural machinery, that is, to achieve switching between various gears such as forward, reverse and neutral of the agricultural machinery.

[0004] The existing agricultural machine speed change device needs to install a rotating shaft on the gear control box, and uses the rotating shaft to realize the rotational connection between the rotating arm and the gear control box, and plays a role in limiting the rotation of the rotating arm. At the same time, it is necessary to use studs to fix the rotating shaft and the gear control box to each other. Therefore, during the production process of the agricultural machine speed change device, it is necessary to drill internal threaded holes in the rotating shaft to realize the fixation between the rotating shaft and the studs, which makes the production process of the rotating shaft cumbersome and complicated, and the cost is high. In addition, during the assembly process of the agricultural machine speed change device, the rotating shaft and the studs need to be assembled and fixed in the agricultural machine speed change device in turn, which also makes the assembly process of the agricultural machine speed change device cumbersome and the assembly efficiency low. Therefore, in view of this, the inventor provides an agricultural machine speed change device to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the problem that the production and assembly process of the traditional agricultural machine speed change device is complicated because the studs are required to fix the rotating shaft.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a speed change device for a farming machine, including a gear control box body, a swing arm assembly arranged in the control box body, a shift fork connected to the swing arm assembly, an operating rod connected to the control box body and used to shift the swing arm assembly, and a double-headed threaded connector for installing the swing arm assembly;

[0007] The double-threaded connector is rotatably connected to the rotating arm. One end of the double-threaded connector passes through the outer wall of the gear control box and is threadedly connected to a first anti-loosening nut, and the other end of the double-threaded connector passes through the rotating arm assembly and is threadedly connected to a second anti-loosening nut.

[0008] Furthermore, the double-headed threaded connector includes a limiting section that is in contact with the inner wall of the gear control box, smooth sections that are respectively arranged at both ends of the limiting section, and external threaded sections that are respectively arranged at the ends of the smooth sections. The rotating arm group is rotatably connected to the smooth section of the double-headed threaded connector located in the gear control box, and the diameters of the limiting section, the smooth section and the external threaded section decrease successively.

[0009] Furthermore, the operating rod includes a ball head shaft and a handle arranged at one end of the ball head shaft, and the other end of the ball head shaft extends into the body of the gear control box and is connected to the rotating arm.

[0010] Furthermore, the pivot arm group includes a first pivot arm and a second pivot arm rotatably connected to the double-headed threaded connector, one end of the first pivot arm and the second pivot arm are closed to each other to form a cavity adapted to the end of the ball head shaft, and the other end of the first pivot arm and the second pivot arm are respectively provided with connecting columns, and the connecting columns are respectively provided with fork holes for installing the fork.

[0011] Furthermore, a gear switching groove is provided at the connection between the outer wall of the gear control box and the ball head shaft, and the outer wall of the connecting column is a smooth arc surface.

[0012] Furthermore, the double-ended threaded connector is also rotatably connected to a first limit plate, the first limit plate is fixedly connected to the gear control box body, and the rotating arm assembly is located between the first limit plate and the inner wall of the gear control box body.

[0013] Furthermore, a second limit plate fixedly connected to the inner wall of the gear control box is provided between the rotating arm assembly and the inner wall of the gear control box.

[0014] The principle and effect of this scheme are:

[0015] 1. The utility model connects the swing arm group and the gear control box body through a double-headed threaded connector. Compared with the traditional connection between the rotating shaft and the stud, the double-headed threaded connector is not only easier to produce and process, thereby reducing the production cost, but also in the process of assembling the swing arm group and the gear control box body, the installation of the swing arm group can be achieved only by the first anti-loosening nut and the second anti-loosening nut respectively cooperating with the two ends of the double-headed threaded connector, making the overall assembly process of the agricultural machine speed change device more convenient and quick, and solving the problem that the traditional agricultural machine speed change device requires studs to fix the rotating shaft, resulting in cumbersome and complicated production and assembly processes of the agricultural machine speed change device.

[0016] 2. The utility model adopts the setting method of limiting the section, smooth section and external thread section, which can not only effectively install the swivel arm and limit the rotation of the swivel arm, but also have a limiting effect on the cooperation between the double-headed threaded connector and the gear control box body, thereby preventing the double-headed threaded connector and the gear control box body from loosening and affecting the position accuracy of the swivel arm group.

[0017] 3. The utility model limits the moving position of the shift fork through the gear switching groove on the outer wall of the gear control box. Compared with the traditional limit structure on the swing arm group, the swing arm group structure of the utility model is simpler and more convenient for production and processing, further reducing the production cost of the agricultural machine speed change device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 An exploded diagram of a speed change device for an agricultural machine proposed in an embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram of one side of a gear control box in a speed change device for an agricultural machine proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] The figure marks in the drawings of the specification include: gear control box body 1, first fixing bolt 2, first anti-loosening nut 3, ball head lower fixing seat 4, ball head shaft 5, sealing ring 6, ball head upper fixing seat 7, base plate 8, base plate fixing bolt 9, second limit plate 10, double-headed threaded connector 11, first rotating arm 12, second rotating arm 13, first limit plate 14, second fixing bolt 15, second anti-loosening nut 16, gear switching groove 17.

[0023] A speed change device for an agricultural machine, for example Figure 1 As shown, it includes a gear control box body 1, an operating lever, a rotating arm group and a double-headed threaded connector 11, etc., which are specifically as follows:

[0024] The gear control box body 1 accommodates and installs structures such as a rotating arm group.

[0025] The operating lever includes a ball head shaft 5, one end of the ball head shaft 5 passes through the gear control box body 1 and is provided with a handle. Correspondingly, a ball head upper fixing seat 7 and a ball head lower fixing seat 4 are symmetrically provided in the gear control box body 1 to install the ball head part of the ball head shaft 5, and a corresponding sealing ring 6 is configured, and a bottom plate 8 is set to limit the positions of the ball head upper fixing seat 7 and the ball head lower fixing seat 4, and the bottom plate 8 is connected to the side wall of the gear control box body 1 through the bottom plate fixing bolts 9.

[0026] The arm assembly includes a first arm 12 and a second arm 13. The first arm 12 and the second arm 13 are closed to each other at one end close to the operating rod to form a cavity adapted to the end of the ball shaft 5. The other ends of the first arm 12 and the second arm 13 are respectively provided with connecting columns, and the connecting columns are respectively provided with fork holes for installing the fork. In this embodiment, Figure 2 As shown, a gear switching groove 17 is provided at the connection between the outer wall of the gear control box body 1 and the ball head shaft 5, so that the outer wall of the connecting column is a smooth arc surface structure. Compared with the traditional limiting structure provided on the swing arm group, the swing arm group structure of this embodiment is simpler, more conducive to production and processing, and reduces the production cost of the agricultural machine speed change device.

[0027] The double-threaded connector 11 includes a limiting section that fits the inner wall of the gear control box body 1, smooth sections respectively arranged at both ends of the limiting section, and external thread sections respectively arranged at the ends of the smooth sections. The diameters of the limiting section, the smooth section, and the external thread section decrease in sequence. The first rotating arm 12 and the second rotating arm 13 are both rotatably connected to the smooth section of the double-threaded connector 11 located in the gear control box body 1. A first limiting plate 14 is further arranged outside the first rotating arm 12 and the second rotating arm 13. A second limiting plate 14 is arranged between the first rotating arm 12 and the second rotating arm 13 and the inner arm of the gear control box body 1. 0, the first limit plate 14 adopts a three-hole limit plate, one of the holes is rotatably connected to the smooth section of the double-headed threaded connector 11, and the other two holes are connected to the inner wall of the gear control box body 1 through the second fixing bolt 15, the second limit plate 10 adopts a two-hole limit plate, and is connected to the inner wall of the gear control box body 1 through the first fixing bolt 2, one end of the double-headed threaded connector 11 passes through the outer wall of the gear control box body 1 and is threadedly connected with the first anti-loosening nut 3, and the other end of the double-headed threaded connector 11 passes through the swing arm assembly and is threadedly connected with the second anti-loosening nut 16.

[0028] In this embodiment, the double-headed threaded connector 11 is first passed through the inner wall of the gear control box body 1 and fixed and locked by the first anti-loosening nut 3, and then the first limit plate 14 is fixed to the inner wall of the gear control box body 1 by the first fixing bolt 2, and then the first rotating arm 12, the second rotating arm 13 and the first limit plate 14 are successively sleeved on the smooth section of the double-headed threaded connector 11, the fork and the fork holes on the connecting column cooperate with each other, the end of the ball head shaft 5 extends between the first rotating arm 12 and the second rotating arm 13, and the first limit plate 14 is fixed to the double-headed threaded connector 11 by locking with the second anti-loosening nut 16, and the ball head shaft 5 is assembled through the ball head upper fixing seat 7, the ball head lower fixing seat 4 and the bottom plate 8, and is fixed to the inner wall of the gear control box body 1 by the second fixing bolt 15, and the assembly process of the operating lever and the rotating arm group can be completed.

[0029] The swivel arm group is connected to the gear control box body 1 through a double-headed threaded connector 11. Compared with the traditional connection between a shaft and a stud, the double-headed threaded connector 11 is not only easier to produce and process, thereby reducing production costs, but also in the process of assembling the swivel arm group and the gear control box body 1, the installation of the swivel arm group can be achieved by only cooperating with the first anti-loosening nut 3 and the second anti-loosening nut 16 respectively with the two ends of the double-headed threaded connector 11, making the overall assembly process of the agricultural machine speed change device more convenient and quick, and solving the problem that the traditional agricultural machine speed change device requires studs to fix the shaft, resulting in cumbersome and complicated production and assembly processes of the agricultural machine speed change device.

[0030] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A speed change device for an agricultural machine, characterized in that: It includes a gear control box body, a swivel arm assembly arranged in the control box body, a shift fork connected to the swivel arm assembly, an operating rod connected to the control box body and used to shift the swivel arm assembly, and a double-headed threaded connector for installing the swivel arm assembly; The double-threaded connector is rotatably connected to the rotating arm. One end of the double-threaded connector passes through the outer wall of the gear control box and is threadedly connected to a first anti-loosening nut, and the other end of the double-threaded connector passes through the rotating arm assembly and is threadedly connected to a second anti-loosening nut.

2. The agricultural machine speed change device according to claim 1, characterized in that: The double-headed threaded connector includes a limiting section that is in contact with the inner wall of the gear control box, smooth sections respectively arranged at both ends of the limiting section, and external threaded sections respectively arranged at the ends of the smooth sections. The rotating arm group is rotatably connected to the smooth section of the double-headed threaded connector located in the gear control box, and the diameters of the limiting section, the smooth section and the external threaded section decrease successively.

3. The agricultural machine speed change device according to claim 1, characterized in that: The operating rod comprises a ball shaft and a handle arranged at one end of the ball shaft, and the other end of the ball shaft extends into the body of the gear control box and is connected to the rotating arm.

4. The agricultural machine speed change device according to claim 3, characterized in that: The pivot arm group includes a first pivot arm and a second pivot arm rotatably connected to the double-headed threaded connector, one end of the first pivot arm and the second pivot arm are closed to each other to form a cavity adapted to the end of the ball head shaft, and the other end of the first pivot arm and the second pivot arm are respectively provided with connecting columns, and the connecting columns are respectively provided with fork holes for installing the fork.

5. The agricultural machine speed change device according to claim 4, characterized in that: A gear switching groove is provided at the connection between the outer wall of the gear control box and the ball head shaft, and the outer wall of the connecting column is a smooth arc surface.

6. The agricultural machine speed change device according to claim 1, characterized in that: The double-threaded connector is also rotatably connected to a first limit plate, the first limit plate is fixedly connected to the gear control box body, and the rotating arm assembly is located between the first limit plate and the inner wall of the gear control box body.

7. The agricultural machine speed change device according to claim 6, characterized in that: A second limiting plate fixedly connected to the inner wall of the gear control box is also provided between the rotating arm group and the inner wall of the gear control box.

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