Gear shifting gearbox of low-horsepower tractor

Abstract

The utility model discloses a low-horsepower tractor gear shifting gearbox which comprises a gearbox body, the lower end of the gearbox body is fixedly connected with mounting plates which play a mounting role in a front-and-back symmetry mode, and the upper end of the gearbox body is connected with a storage frame through bolts. The mounting plate is placed at the upper end of the bearing plate, a limiting structure and a lubricating structure are arranged on the upper side of the bearing plate, the limiting structure comprises a connecting plate, a connecting rod, a threaded rod, an adjusting ring, a connecting strip, a limiting barrel and a limiting hole, and the lubricating structure comprises an oil bag, an oil inlet pipe, an extrusion plate, a rack, a gear, a connecting shaft and a micro motor. A protective cover is placed at the upper end of the storage frame, and the front end and the rear end of the protective cover are rotationally connected with connecting pieces. According to the low-horsepower tractor gear shifting gearbox, the gearbox can be conveniently detached from a tractor to be overhauled, the interior of the gearbox can be conveniently lubricated, and meanwhile the oil bag can be easily oiled.

Description

Technical Field

[0001] The utility model relates to the technical field of a shift gearbox for a small horsepower tractor, in particular to a shift gearbox for a small horsepower tractor. Background Art

[0002] Tractors are mainly used for field operations. There are various horsepowers of tractors on the market, and low-horsepower tractors are one of them. The gearbox is an indispensable component of the tractor, and the various structures of the gearbox can meet different needs.

[0003] However, it is not convenient to remove the gearbox from the tractor for maintenance, and it is not convenient to lubricate the inside of the gearbox, and it is not easy to oil the oil bag. Therefore, we propose a CNC hardware processing lathe with positioning and clamping functions to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a small horsepower tractor shift gearbox to solve the problems of the existing small horsepower tractor shift gearbox proposed in the above background technology, that the gearbox is not convenient to be disassembled from the tractor for maintenance, and it is not convenient to lubricate the inside of the gearbox and it is not easy to oil the oil bag.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small horsepower tractor shift gearbox, comprising: a gearbox body, a mounting plate having a mounting function and a storage frame having a front-to-back symmetrical fixed connection to the lower end of the gearbox body and a storage frame having a bolt connection to the upper end of the gearbox body;

[0006] Also includes:

[0007] The mounting plate is placed on the upper end of the bearing plate, and a limiting structure and a lubricating structure are respectively arranged on the upper side of the bearing plate, wherein the limiting structure includes a connecting plate, a connecting rod, a threaded rod, an adjusting ring, a connecting strip, a limiting cylinder and a limiting hole, and the lubricating structure includes an oil bag, an oil inlet pipe, an extrusion plate, a rack, a gear, a connecting shaft and a micro motor;

[0008] A protective cover is placed on the upper end of the storage frame, and both the front and rear ends of the protective cover are rotatably connected with connecting pieces.

[0009] Preferably, the connecting plate is integrally connected to the upper end of the bearing plate in a front-to-back symmetrical manner, and a connecting rod is embedded and connected to the upper end of the connecting plate, and a threaded rod is rotatably connected to the upper end of the connecting rod.

[0010] Preferably, an adjusting ring is threadedly connected to the mounting plate, and the upper end of the adjusting ring is slidably connected to the inner part of the upper end of the connecting plate, and the lower end of the adjusting ring is rotatably connected to a connecting strip;

[0011] The lower end of the connecting strip is rotatably connected to the upper end of the limiting cylinder, and the longitudinal section of the limiting cylinder is a "concave"-shaped structure, and the interior of the limiting cylinder is nested and connected to the lower end of the connecting rod.

[0012] Preferably, the limiting cylinder is snap-connected inside the limiting hole, wherein the limiting hole is opened inside the mounting plate which is symmetrically arranged front and back.

[0013] Preferably, an oil bag is glued and connected inside the storage frame, and an oil inlet pipe is fixedly connected to the bottom end of the oil bag in a left-right symmetrical manner, and the lower end of the oil inlet pipe is installed on the upper end of the gearbox body;

[0014] The upper left end of the oil bag is fixedly connected with a connecting pipe, and the upper end of the connecting pipe is threadedly connected with a sealing cover, and the outer end diameter of the sealing cover is smaller than the inner diameter of the left end of the extrusion plate.

[0015] Preferably, a rack is embedded and connected in the middle of the upper end of the extrusion plate, and the rack is connected through the upper end of the protective cover, and the right end of the rack is meshed and connected with a gear;

[0016] Among them, a connecting shaft is fixedly connected to the center of the gear, and the connecting shaft is rotatably connected to the upper right end of the protective cover, and a micro motor is installed at the rear end of the connecting shaft, and the extrusion plate is in a lifting structure inside the storage frame through the gear and the rack.

[0017] Preferably, the left end of the connector is integrally connected to a limiting strip, and the limiting strip is nested and connected in the hollow structure of the limiting ear, and the limiting ear is fixedly connected to the upper end of the storage frame in a front-to-back symmetrical manner.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the small horsepower tractor shift gearbox is convenient for disassembling the gearbox from the tractor for maintenance, and is convenient for lubricating the inside of the gearbox and oiling the oil bag;

[0019] 1. A threaded rod and a limiting cylinder are provided, and the limiting cylinder is connected to the inside of the limiting hole by snapping, so that when the threaded rod rotates, the adjusting ring is moved away from the connecting rod, and the limiting cylinder is slid upward on the connecting rod through the connecting strip until the limiting cylinder is separated from the inside of the limiting hole, and the gearbox body is pulled left or right to move the mounting plate away from the lower end of the limiting cylinder, and then the gearbox body is pulled upward to remove it from the bearing plate, so that the gearbox body can be removed from the tractor for inspection and maintenance;

[0020] 2. An oil bag and a rack are provided, and the structure design of the extrusion plate inside the storage frame enables that when the control valve on the oil inlet pipe is opened, the gear rotates and meshes with the rack to drive the extrusion plate to descend inside the storage frame, and the extrusion plate squeezes the oil bag when it descends. The lubricating oil in the oil bag enters the interior of the gearbox body through the oil inlet pipes arranged symmetrically on the left and right, thereby facilitating the lubrication of the interior of the gearbox body;

[0021] 3. A protective cover and a connecting piece are provided, and the limit bar is nested and connected in the hollow structure of the limit ear, so that the limit bar is separated from the inside of the limit ear by rotating the connecting piece, and the protective cover is pulled upward to remove it from the storage frame. The upper end of the connecting pipe is threadedly connected with a sealing cap, so that when the sealing cap is detached from the upper end of the connecting pipe, lubricating oil is added to the inside of the oil bag through the connecting pipe, thereby facilitating oiling of the oil bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model from the right side;

[0024] Figure 3 This is a schematic diagram of the left side cross-sectional structure of the connection between the connecting rod and the limiting cylinder of the utility model;

[0025] Figure 4 This is a front view structural diagram of the connection between the connector and the limit strip of the utility model;

[0026] Figure 5 It is a schematic diagram of the top cross-sectional structure of the connection between the extrusion plate and the rack of the utility model.

[0027] In the figure: 1. gearbox body; 2. mounting plate; 3. bearing plate; 4. connecting plate; 5. connecting rod; 6. threaded rod; 7. adjusting ring; 8. connecting strip; 9. limiting cylinder; 10. limiting hole; 11. storage frame; 12. oil bag; 13. oil inlet pipe; 14. connecting pipe; 15. sealing cover; 16. extrusion plate; 17. rack; 18. gear; 19. connecting shaft; 20. micro motor; 21. protective cover; 22. connecting piece; 23. limiting strip; 24. limiting ear. DETAILED DESCRIPTION

[0028] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-5 The utility model provides a technical solution: a small horsepower tractor shift gearbox, comprising a gearbox body 1, a mounting plate 2, a bearing plate 3, a connecting plate 4, a connecting rod 5, a threaded rod 6, an adjusting ring 7, a connecting strip 8, a limiting cylinder 9, a limiting hole 10, a storage frame 11, an oil bag 12, an oil inlet pipe 13, a connecting pipe 14, a sealing cover 15, an extrusion plate 16, a rack 17, a gear 18, a connecting shaft 19, a micro motor 20, a protective cover 21, a connecting piece 22, a limiting strip 23 and a limiting ear 24. When the small horsepower tractor shift gearbox is used, Figure 1 , Figure 2 and Figure 5 The lubrication structure includes an oil bag 12, an oil inlet pipe 13, an extrusion plate 16, a rack 17, a gear 18, a connecting shaft 19 and a micro motor 20. Since the bottom end of the oil bag 12 is fixedly connected with the oil inlet pipe 13 symmetrically, the outer end diameter of the sealing cover 15 is smaller than the inner diameter of the left end of the extrusion plate 16, the right end of the rack 17 is meshed with the gear 18, and the extrusion plate 16 is in a lifting structure inside the storage frame 11 through the gear 18 and the rack 17;

[0030] Therefore, when it is necessary to lubricate the parts inside the gearbox body 1 regularly, the control valves installed on the left and right oil inlet pipes 13 are opened, and the micro motor 20 is driven to drive the connecting shaft 19 to rotate at the upper right end of the protective cover 21. When the connecting shaft 19 rotates, the gear 18 is driven to rotate. When the gear 18 rotates, it meshes with the serrated structure at the right end of the rack 17, so that the rack 17 drives the extrusion plate 16 to descend inside the storage frame 11;

[0031] When the squeezing plate 16 descends, it squeezes the oil bag 12 downward, allowing the lubricating oil inside the oil bag 12 to enter the interior of the gearbox body 1 through the oil inlet pipe 13 symmetrically arranged on the left and right. The structure at the left end of the squeezing plate 16 ensures that the connecting pipe 14 will not affect the lifting of the squeezing plate 16, thereby facilitating the lubrication of the interior of the gearbox body 1.

[0032] As shown Figure 2 and Figure 3 The limiting structure includes a connecting plate 4, a connecting rod 5, a threaded rod 6, an adjusting ring 7, a connecting strip 8, a limiting cylinder 9 and a limiting hole 10. Since the upper end of the adjusting ring 7 is slidably connected to the inner part of the upper end of the connecting plate 4, the front cut longitudinal section of the limiting cylinder 9 is a "concave"-shaped structure, the inner part of the limiting cylinder 9 is nested and connected to the lower end of the connecting rod 5, and the limiting cylinder 9 is snap-connected to the inner part of the limiting hole 10;

[0033] Therefore, when the gearbox body 1 needs to be repaired, the threaded rod 6 is rotated to allow the upper end of the adjusting ring 7 to slide outward inside the upper end of the connecting plate 4. When the adjusting ring 7 is away from the connecting rod 5, the connecting strip 8 pulls the limiting cylinder 9 upward, so that the limiting cylinder 9 with a "concave"-shaped structure in the vertical section slides upward on the connecting rod 5, so that the limiting cylinder 9 is completely nested and connected to the connecting rod 5, and the limiting cylinder 9 is detached from the inside of the limiting hole 10, and the gearbox body 1 is pulled left or right to move the mounting plate 2 away from the lower side of the connecting plate 4, and the gearbox body 1 is pulled upward to remove it from the bearing plate 3;

[0034] The bearing plate 3 is installed on the tractor. After the gearbox body 1 is repaired, the gearbox body 1 is placed on the upper end of the bearing plate 3, so that the mounting plate 2 symmetrically arranged in the front and rear is located directly below the connecting plate 4, and the threaded rod 6 is rotated to make the upper end of the adjusting ring 7 slide inward inside the upper end of the connecting plate 4, so that the adjusting ring 7 is close to the connecting rod 5, so that the connecting bar 8 pushes the limiting cylinder 9 downward, and the limiting cylinder 9 is respectively engaged and connected in the limiting holes 10 symmetrically arranged in the front and rear, so as to limit the position of the gearbox body 1 on the bearing plate 3, so as to facilitate the removal of the gearbox body 1 from the tractor for inspection;

[0035] like Figure 1 , Figure 2 , Figure 4 and Figure 5 Since the outer diameter of the sealing cover 15 is smaller than the inner diameter of the left end of the extrusion plate 16, the limiting strip 23 is nested and connected in the hollow structure of the limiting ear 24, and the limiting ear 24 is fixedly connected to the upper end of the storage frame 11 symmetrically in front and back, and the front and rear ends of the protective cover 21 are rotatably connected with the connecting piece 22;

[0036] Therefore, when the lubricating oil in the oil bag 12 needs to be added, the connecting member 22 is pulled rightward to rotate its upper end on the protective cover 21, so that the limiting strip 23 is separated from the hollow structure of the limiting ear 24 when the connecting member 22 rotates, and the protective cover 21 is pulled upward to remove it from the storage frame 11, and the extrusion plate 16 can be separated from the inside of the storage frame 11, and the sealing cover 15 is rotated to separate it from the connecting pipe 14;

[0037] Add lubricating oil from the inside of the connecting pipe 14 to the inside of the oil bag 12. After the lubricating oil inside the oil bag 12 is filled, rotate the sealing cap 15 to make it threadedly connected to the upper end of the connecting pipe 14, cover the upper end of the storage frame 11 with the protective cover 21, and let the extrusion plate 16 re-enter the interior of the storage frame 11;

[0038] Push the connecting piece 22 to the left to rotate it, driving the limit strip 23 to rotate, so that the limit strips 23 symmetrically arranged front and back are nested and connected in the hollow structure of the limit ears 24 at the corresponding positions, thereby limiting the position of the protective cover 21, so that the protective cover 21 and the storage frame 11 protect the oil bag 12, thereby facilitating oiling the oil bag 12. The electrical components contained above are all prior art and will not be described in detail here.

[0039] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small horsepower tractor gearbox, comprising: The gearbox body (1), the lower end of the gearbox body (1) is symmetrically fixedly connected to a mounting plate (2) for mounting, and the upper end of the gearbox body (1) is bolted to a storage frame (11); It is characterized by further comprising: The mounting plate (2) is placed on the upper end of the bearing plate (3), and a limiting structure and a lubricating structure are respectively arranged on the upper side of the bearing plate (3), wherein the limiting structure comprises a connecting plate (4), a connecting rod (5), a threaded rod (6), an adjusting ring (7), a connecting strip (8), a limiting cylinder (9) and a limiting hole (10), and the lubricating structure comprises an oil bag (12), an oil inlet pipe (13), an extrusion plate (16), a rack (17), a gear (18), a connecting shaft (19) and a micro motor (20); A protective cover (21) is placed on the upper end of the storage frame (11), and the front and rear ends of the protective cover (21) are rotatably connected to connecting pieces (22).

2. A small horsepower tractor shift gearbox according to claim 1, characterized in that: The connecting plate (4) is integrally connected to the upper end of the bearing plate (3) in a front-to-back symmetrical manner, and a connecting rod (5) is embedded and connected to the upper end of the connecting plate (4), and a threaded rod (6) is rotatably connected to the upper end of the connecting rod (5).

3. A small horsepower tractor shift gearbox according to claim 2, characterized in that: The mounting plate (2) is threadedly connected with an adjusting ring (7), and the upper end of the adjusting ring (7) is slidably connected to the interior of the upper end of the connecting plate (4), and the lower end of the adjusting ring (7) is rotatably connected with a connecting strip (8); The lower end of the connecting strip (8) is rotatably connected to the upper end of the limiting cylinder (9), and the longitudinal section of the limiting cylinder (9) is in a "concave" shape, and the interior of the limiting cylinder (9) is nested and connected to the lower end of the connecting rod (5).

4. A small horsepower tractor shift gearbox according to claim 3, characterized in that: The limiting cylinder (9) is snap-fitted and connected inside the limiting hole (10), wherein the limiting hole (10) is opened inside the mounting plate (2) which is symmetrically arranged front and back.

5. The small horsepower tractor shift gearbox according to claim 1, characterized in that: The storage frame (11) is glued to an oil bag (12) inside, and the bottom end of the oil bag (12) is fixedly connected to an oil inlet pipe (13) in a left-right symmetrical manner, and the lower end of the oil inlet pipe (13) is mounted on the upper end of the gearbox body (1); The upper left end of the oil bag (12) is fixedly connected to a connecting pipe (14), and the upper end of the connecting pipe (14) is threadedly connected to a sealing cover (15), and the outer end diameter of the sealing cover (15) is smaller than the inner diameter of the left end of the extrusion plate (16).

6. A small horsepower tractor shift gearbox according to claim 5, characterized in that: A rack (17) is embedded and connected at the middle position of the upper end of the extrusion plate (16), and the rack (17) penetrates and is connected to the upper end of the protective cover (21), and the right end of the rack (17) is meshed and connected to a gear (18); A connecting shaft (19) is fixedly connected to the center of the gear (18), and the connecting shaft (19) is rotatably connected to the upper right end of the protective cover (21), and a micro motor (20) is installed at the rear end of the connecting shaft (19), and the extrusion plate (16) is in a lifting structure inside the storage frame (11) through the gear (18) and the rack (17).

7. The small horsepower tractor shift gearbox according to claim 1, characterized in that: The left end of the connecting piece (22) is integrally connected to a limiting strip (23), and the limiting strip (23) is nested and connected in the hollow structure of the limiting ear (24), and the limiting ear (24) is fixedly connected to the upper end of the storage frame (11) in a front-to-back symmetrical manner.

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