Assembling device and assembling method for gearbox double-shaft assembly of tractor

Abstract

The invention belongs to the field of mechanical manufacture and relates to an assembling device and an assembling method for gearbox double-shaft assemblies of a tractor. The assembling device comprises a body component (9), two sets of guide components (10), a locating component (11), a hoisting hook component (12) and a pre-installing component (13). The locating component (11), the guide components (10) and the hoisting hook component (12) are fixedly connected to the body component (9) to form a fixedly connected 'integral assembly'. According to the assembling device and the assembling method for gearbox double-shaft assemblies of the tractor, when the double-shaft assemblies conduct assembly in a casing of a power shifting gearbox in an arranging mode, mesh gears between the double-shaft assemblies are in the normal mesh state, collision mechanical damage produced on the mesh faces of the gears is avoided, and it is further ensured that the double-shaft assemblies are accurately aligned when the double-shaft assemblies fall down, so that seal rings at the shaft ends are prevented from being cut, scratched and damaged. In addition, the assembling device is novel in structure, the assembling method is easy to implement and has good use value.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to an assembly device and an assembly method for a tractor gearbox biaxial assembly. Background technique [0002] The gearbox is an important part of the tractor. At present, most domestic tractors still use mechanical shift gearboxes, also known as manual shift gearboxes, the structure and assembly method of the gearbox housing and transmission mechanism (gears, shafts, bearings, sleeves, keys, etc.). like figure 1 shown. [0003] Depend on figure 1 As we know, in the inner cavity 1a of the machine shift housing (referring to the mechanical shift gearbox housing) 1, there is a transmission structure—the output shaft assembly and the input shaft assembly; there is an upper opening 1b on the top of the machine shift housing 1; On the front side of the casing 1, there are installation holes for the flange 2c for the output shaft and the installation holes for the front beari...

AI Technical Summary

Problems solved by technology

[0021] 1. The meshing state of the gears on the first shaft assembly 5 and the second shaft assembly 6 is not good, if they are often in a skewed and disengaged state, the distance L1' between the first shaft assembly and the second shaft assembly cannot be guaranteed, that is , L1' is too different from the dimension L1 of the first-axis and second-axis installation holes, which makes it difficult for the first-axis head end 5a' and the second-axis head end 6a' to fall into the first-axis installation hole δ1 and the second-axis installation during the falling process. In the hole δ2, it is necessary to manually straighten and repeat the alignment correction, which is not only time-consuming and labor-intensive, but also inefficient

[0022] 2. Since the above-mentioned meshing gears are often in a skewed and disengaged state, and because the total weights of the first shaft assembly 5 and the second shaft assembly 6 are different, the drop size of the bearing end faces of the lower end of the first shaft assembly and the second shaft assembly H1' cannot be guaranteed, that is, the difference between H1' and the end face drop size H1 of the bearing holes of the first-axis assembly and the second-axis assembly is too large. 'It is difficult to fall into the first-axis installation hole δ1 and the second-axis installation hole δ2. In addition, this situation also makes the meshing surface of the gear prone to bumps and flaws, which affects the quality of subsequent products.

[0023] 3. During the falling process of the combined binding (one-axis assembly 5 and two-axis assembly 6), due to the lack of falling guidance and the fact that the operator cannot observe the falling situation from the surrounding sides of the dynamic casing 4, timely guide and correct it Therefore, even if the above problems do not exist, it will also cause the problem of difficulty in falling and aligning when the head end 5a' of the first axis and the head end 6a' of the second axis fall into the first axis installation hole δ1 and the second axis installation hole δ2

[0024] 4. It is precisely because of the above-mentioned first-axis head end 5a' and second-axis head end 6a' that occur when falling into the first-axis installation hole δ1 and the second-axis installation hole δ2, the problem of falling and alignment is difficult, and then a chain reaction occurs, making The seal ring 5e for the head end of the first shaft and the seal ring 6e for the head end of the second shaft are often scratched and damaged by the corner β1 on the mounting hole of the first shaft and the corner β2 on the mounting hole of the second shaft, resulting in poor sealing and occurrence of The occurrence of oil leakage seriously affects the quality of subsequent products

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