Header main input gear speed changing box

Abstract

The utility model relates to a header main input gear speed changing box, and belongs to the technical field of speed changing boxes. According to the technical scheme, a first tapered roller bearing (91) and a second tapered roller bearing (92) are arranged on the portion, stretching into a box body, of an input shaft (1), a face bevel gear (12) is arranged on the portion, between the first tapered roller bearing (91) and the second tapered roller bearing (92), of the input shaft (1), and a third tapered roller bearing (93) and a fourth tapered roller bearing (94) are arranged on the portion, stretching into the box body, of an output shaft (5). Involute straight teeth are arranged on the portion, between the third tapered roller bearing (93) and the fourth tapered roller bearing (94), of the output shaft, and the face bevel gear is meshed with the involute straight teeth on the output shaft. According to the gearbox, the face bevel gear on the input shaft is meshed with the involute straight teeth on the output shaft to form a gear pair to form a main speed changing structure, the whole thickness of the face bevel gear is small, the involute straight teeth and the output shaft are of an integrated structure, and installation space is greatly saved.

Description

Technical Field

[0001] The utility model relates to a main input gear transmission case for a cutting platform, belonging to the technical field of transmission cases. Background Art

[0002] The header is a suspended crop harvesting machine, which is generally powered by a harvester. Its power is transmitted to the header by the main input gearbox. At present, domestic gearbox transmissions include: spiral bevel gear transmission, cylindrical gear transmission, hypoid gear transmission, and worm gear transmission. These gearbox transmission components have the problem of large layout space, which makes the entire gearbox large, which in turn leads to larger header structure size, increased machine weight, increased production and maintenance costs, and increased transportation difficulty. The types of domestic crop harvesting header gearboxes are complex. The harvesting of different crops requires different transmission ratios of gearboxes under the premise of constant torque to achieve a good harvesting effect. The diversification of gearbox transmission components requires the overall size and installation distance of the gearbox body to change accordingly. Agricultural machinery also has to face the harsh working environment in the field. The high-precision transmission device of the gearbox does not allow dust and other impurities to enter the box. Therefore, it is urgent to design a transmission structure with small layout space, light weight, high transmission efficiency, and good sealing effect. Under the premise of ensuring a small gearbox size and constant torque, a transmission device with different transmission ratios of the same gearbox can be realized through transmission components. Utility Model Content

[0003] The purpose of the utility model is to provide a main input gear gearbox for a cutting platform, in which a non-integrated gear shaft input shaft and an integrated gear shaft output shaft in the gearbox cooperate with each other, and a main input gearbox with adjustable transmission ratio is formed by meshing the bevel gear on the input shaft and the output shaft with involute spur teeth to solve a series of problems in the technical background.

[0004] The technical solution of the utility model is:

[0005] A main input gear gearbox for a cutting platform comprises an input shaft, an upper cover, a bottom shell, an output shaft, a first tapered roller bearing, a second tapered roller bearing, a third tapered roller bearing, a fourth tapered roller bearing and a face bevel gear. The upper cover and the bottom shell are assembled together to form a box body. The portion of the input shaft extending into the box body is provided with a first tapered roller bearing and a second tapered roller bearing. The input shaft between the first tapered roller bearing and the second tapered roller bearing is provided with a face bevel gear. The portion of the output shaft extending into the box body is provided with a third tapered roller bearing and a fourth tapered roller bearing. The output shaft between the third tapered roller bearing and the fourth tapered roller bearing is provided with a Involute spur gear , bevel gear and output shaft Involute spur gear Meshing, the axes of the input shaft and the output shaft are perpendicular to each other.

[0006] Furthermore, the bevel gear comprises an annular body and a tooth surface, and the annular surface of the annular body adjacent to the output shaft is provided with a tooth surface protruding outward, and the tooth surface is aligned with the output shaft. Involute spur gear Meshing.

[0007] Furthermore, a skeleton oil seal 1 is provided between the input shaft on one side of the tapered roller bearing and the housing; an oil seal cover is provided between the input shaft on the second side of the tapered roller bearing and the housing; and a skeleton oil seal 2 is provided between the output shaft on the fourth side of the tapered roller bearing and the housing.

[0008] Furthermore, an elastic retaining ring for a hole and an adjusting pad are provided on the input shaft between the tapered roller bearing 1 and the skeleton oil seal 1; an elastic retaining ring for a hole and an adjusting pad are provided on the input shaft between the tapered roller bearing 2 and the oil seal cover; and an elastic retaining ring for a hole and an adjusting pad are provided on the output shaft between the tapered roller bearing 4 and the skeleton oil seal 2.

[0009] Furthermore, a sprocket is provided on the input shaft outside the box body.

[0010] The output shaft is directly provided with Involute straight teeth, therefore It is an integrated gear shaft output shaft; a bevel gear is installed on the input shaft. because It is a non-integrated gear input shaft.

[0011] The utility model can realize different transmission ratios of the gearbox only by replacing bevel gears with different diameters without replacing the gearbox housing, thereby realizing the unification of the gearbox housing.

[0012] The positive effect of the utility model: the gearbox changes the traditional main transmission structure, adopts the bevel gear on the input shaft and the bevel gear on the output shaft. Involute spur gear The meshing gear pair forms the main transmission structure. The overall thickness of the bevel gear is relatively thin. gradually Open line straight teeth The integrated structure with the output shaft greatly saves installation space, reduces the size of the gearbox, reduces the weight of the whole machine, reduces production and maintenance costs, and reduces transportation difficulty; hard tooth surface transmission is used for speed and direction change, and the transmission efficiency is high; the upper cover, bottom shell and various oil seals are assembled into a closed box with good sealing effect, which is suitable for machines working in the open air all year round and greatly extends the service life of the header; when the overall size, installation distance and torque of the gearbox remain unchanged, the bevel gear on the input shaft can achieve different transmission ratios by changing the diameter, thereby realizing the unification of the gearbox housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the bevel gear of the utility model;

[0016] In the figure: input shaft 1, upper cover 2, bottom shell 3, sprocket 4, output shaft 5, Involute spur gear 51, bearing sleeve 6, elastic retaining ring for hole 1 71, adjusting pad 1 81, elastic retaining ring for hole 2 72, adjusting pad 2 82, elastic retaining ring for hole 3 73, adjusting pad 3 83, tapered roller bearing 1 91, tapered roller bearing 2 92, tapered roller bearing 3 93, tapered roller bearing 4 94, hexagon socket flat end set screw 10, skeleton oil seal 1 11, bevel gear 12, annular body 121, tooth surface 122, oil seal cover 13, skeleton oil seal 2 14. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Combined with Figure 1 and 2 The present embodiment provides a header main input gear transmission, comprising an input shaft 1, an upper cover 2, a bottom shell 3, an output shaft 5, a tapered roller bearing 1 91, a tapered roller bearing 2 92, a tapered roller bearing 3 93, a tapered roller bearing 4 94 and a bevel gear 12. The upper cover 2 and the bottom shell 3 are assembled together to form a housing. The portion of the input shaft 1 extending into the housing is provided with a tapered roller bearing 1 91 and a tapered roller bearing 2 92. The input shaft 1 between the tapered roller bearing 1 91 and the tapered roller bearing 2 92 is provided with a bevel gear 12. The portion of the output shaft 5 extending into the housing is provided with a tapered roller bearing 3 93 and a tapered roller bearing 4 94. The output shaft 5 between the tapered roller bearing 3 93 and the tapered roller bearing 4 94 is provided with a Involute spur gear 51, Involute spur gear 51 is an integral structure with the output shaft 5, and the bevel gear 12 is connected to the output shaft 5. Involute spur gear 51 meshes, and the axes of the input shaft 1 and the output shaft 5 are perpendicular to each other.

[0019] Refer to the attached Figure 3 The bevel gear 12 comprises an annular body 121 and a tooth surface 122. The annular surface of the annular body 121 adjacent to the output shaft 5 is provided with a tooth surface 122 protruding outward. The tooth surface 122 is arranged radially. Involute spur gear 51 phases meshing.

[0020] A skeleton oil seal 11 is provided between the input shaft beside the tapered roller bearing 1 91 and the housing; an oil seal cover 13 is provided between the input shaft beside the tapered roller bearing 2 92 and the housing; a skeleton oil seal 2 14 is provided between the output shaft beside the tapered roller bearing 4 94 and the housing.

[0021] An elastic retaining ring 71 for a hole and an adjusting pad 81 are provided on the input shaft 1 between the tapered roller bearing 91 and the skeleton oil seal 11; an elastic retaining ring 72 for a hole and an adjusting pad 82 are provided on the input shaft 1 between the tapered roller bearing 92 and the oil seal cover 13; an elastic retaining ring 73 for a hole and an adjusting pad 83 are provided on the output shaft 5 between the tapered roller bearing 94 and the skeleton oil seal 14.

[0022] All speed and direction changes are driven by hardened gear surfaces, and the housing is made of alloy material, which ensures that the gears can stably transmit power while effectively reducing the overall weight of the cutting platform and reducing the overall size.

[0023] The entire gearbox of the utility model is installed on the side of the cutting platform, and the power is directly connected to the harvesting machine. The power is transmitted to the output shaft 5 through the input shaft 1, and then transmitted to the cutter in front of the cutting platform by the output shaft 5. The input shaft 1 is equipped with a sprocket 4 through a hexagonal flat-end set screw 10, and the sprocket 4 transmits the power to the auger. The bevel gear 12 is fixed to the input shaft 1 by screws, and the output shaft 5 directly adopts a straight tooth shaft. The bevel gear 12 and the output shaft 5 are connected to the output shaft 5. Involute spur gear The left-right interchangeable assembly mode of 51 forms a reversible transmission path.

[0024] The input shaft 1 is longitudinally fixed to the upper cover 2 through a tapered roller bearing 91. An adjustment pad 81, a hole elastic ring 71 and an oil seal frame 11 are installed between the input shaft 1 and the upper cover 2, and the sealing performance is good. The input shaft 1 is longitudinally fixed to the bottom shell 3 through a tapered roller bearing 92. An adjustment pad 82, a hole elastic ring 72 and an oil seal cover 13 are installed between the input shaft 1 and the bottom shell 3, and the sealing performance is good. The output shaft 5 is transversely fixed to the bottom shell 3 through a tapered roller bearing 93, a tapered roller bearing 94 and a bearing sleeve 6. The output shaft 5 located between the tapered roller bearing 93 and the tapered roller bearing 94 is provided with a uniformly arranged circumferential direction. Involute spur gear 51, there are bearing fixing holes inside the bottom shell 3 to make the output power more stable.

[0025] In this embodiment, the bevel gear 12 is fixed on the input shaft 1. The bevel gear 12 is different from the helical bevel gear and has a thin overall thickness, which saves the gearbox space to a large extent. Involute spur gear The meshing forms a gear pair, which is assembled in a left-right alternating manner to form a reversible transmission path. Figure 2 When rotating clockwise from left to right, the output shaft 5 Figure 2It rotates clockwise when viewed from bottom to top; there are four tapered roller bearings on the input shaft 1 and the output shaft 5 in the box to ensure smooth movement during transmission; there are also elastic retaining rings for holes, adjustment pads, skeleton oil seals and oil seal covers on the input shaft 1 and the output shaft 5 to ensure sealing and prevent impurities from entering the box and affecting transmission.

[0026] The utility model adopts the speed change method of the vertical distribution of the central axis of the traditional bevel gear, and introduces the meshing method of the bevel gear on the input shaft and the involute straight tooth on the output shaft. It can be seen that the input shaft is not a form of integrated gear and shaft, and the overall thickness of the bevel gear is smaller than that of the traditional bevel gear. While not affecting the transmission, the size of the input shaft becomes smaller, and the size of the entire box will also become smaller, which is convenient for maintenance and transportation. The diameter of the bevel gear can also affect the transmission ratio, and changing the diameter does not affect the torque. The larger the diameter, the lower the output speed, and the smaller the diameter, the higher the output speed. A suitable meshing diameter can be selected according to the harvest of different crops, so that the transmission efficiency is high and the harvesting effect is better.

Claims

1. A header main input gearbox, characterized in that: The invention comprises an input shaft (1), an upper cover (2), a bottom shell (3), an output shaft (5), a first tapered roller bearing (91), a second tapered roller bearing (92), a third tapered roller bearing (93), a fourth tapered roller bearing (94) and a bevel gear (12). The upper cover (2) and the bottom shell (3) are assembled together to form a housing. The portion of the input shaft (1) extending into the housing is provided with a first tapered roller bearing (91) and a second tapered roller bearing (92). The input shaft (1) between the first tapered roller bearing (91) and the second tapered roller bearing (92) is provided with a bevel gear (12). The portion of the output shaft (5) extending into the housing is provided with a third tapered roller bearing (93) and a fourth tapered roller bearing (94). The output shaft (5) between the third tapered roller bearing (93) and the fourth tapered roller bearing (94) is provided with a bevel gear (12). Involute spur gear (51), bevel gear (12) and output shaft (5) Involute spur gear (51) meshes with each other, and the axes of the input shaft (1) and the output shaft (5) are perpendicular to each other.

2. A header main input gearbox according to claim 1, characterized in that: The bevel gear (12) comprises an annular body (121) and a tooth surface (122); the annular surface of the annular body (121) adjacent to the output shaft (5) is provided with a tooth surface (122) protruding outwards, and the tooth surface (122) is aligned with the tooth surface on the output shaft (5). Involute spur gear (51) mesh with each other.

3. A header main input gearbox according to claim 2, characterized in that: A skeleton oil seal 1 (11) is provided between the input shaft next to the tapered roller bearing 1 (91) and the housing; an oil seal cover (13) is provided between the input shaft next to the tapered roller bearing 2 (92) and the housing; and a skeleton oil seal 2 (14) is provided between the output shaft next to the tapered roller bearing 4 (94) and the housing.

4. A header main input gearbox according to claim 3, characterized in that: An elastic retaining ring for hole (71) and an adjusting washer (81) are provided on the input shaft (1) between the tapered roller bearing (91) and the skeleton oil seal (11); an elastic retaining ring for hole (72) and an adjusting washer (82) are provided on the input shaft (1) between the tapered roller bearing (92) and the oil seal cover (13); and an elastic retaining ring for hole (73) and an adjusting washer (83) are provided on the output shaft (5) between the tapered roller bearing (94) and the skeleton oil seal (14).

5. A header main input gearbox according to claim 1 or 2, characterized in that: A sprocket (4) is provided on the input shaft (1) outside the housing.

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