Split type power output shell connecting structure for tractor

Abstract

A split type power output shell connecting structure for a tractor comprises a power output shell. Bolt holes are formed in the power output shell and the upper pull rod connecting seat, the opposite bolt holes of the power output shell and the upper pull rod connecting seat are connected through bolts, and a driving shaft bearing hole step is arranged in the middle of the power output shell; the upper pull rod connecting base comprises a main body plate, two supporting plates connected to the surface of the main body plate, two lower extending parts connected to one side of the main body plate and side extending parts connected to the two opposite faces of the main body plate, upper pull rod pin shaft holes are formed in the middles of the supporting plates, and reinforcing ribs are arranged at the corners, connected with the supporting plates, of the main body plate; the two lower extending parts are clamped on the two sides of the step of the driving shaft bearing hole. According to the split type power output shell connecting structure for the tractor, a split type structure is adopted, maintenance and replacement are convenient, meanwhile, the structural form of the power output shell and the structural form of the upper pull rod connecting base are improved, the strength after connection is improved, and stability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of a tractor power output seat, in particular to a split power output housing connection structure for a tractor. Background Art

[0002] In recent years, with the diversity of agronomy and supporting agricultural machinery, the domestic demand for the application of PTO power output mechanisms and rear suspension mechanisms for high-horsepower wheeled tractors has become increasingly widespread. At present, most mainstream tractor manufacturers in China use a rear-mounted three-point suspension structure. In the design and application of the power output housing of high-horsepower wheeled tractors of 200 and above, the upper tie rod connector and the power output housing are often designed as an integrated structure. When an integrated structure is broken or damaged, it needs to be replaced as a whole, and the maintenance cost is relatively high. If it is split into a split structure, only a single damaged split structure needs to be replaced, but the connection of each split structure is difficult to achieve the strength and stability of the integrated structure.

[0003] Therefore, it is necessary to develop a split power output housing structure with reasonable structure and appropriate strength. Utility Model Content

[0004] The utility model aims to provide a split power output housing connection structure for a tractor, which adopts a split structure to facilitate maintenance and replacement, and at the same time improves the structural form of the power output housing and the upper pull rod connection seat respectively, thereby improving the strength after connection and enhancing stability.

[0005] The technical solution adopted by the utility model is: a split power output housing connection structure for a tractor, comprising a power output housing;

[0006] Bolt holes are provided on the power output housing and the upper pull rod connecting seat, and the bolt holes opposite to each other are connected by bolts. The middle part of the power output housing is provided with a driving shaft bearing hole step;

[0007] The upper pull rod connecting seat comprises a main body plate, two support plates connected to the surface of the main body plate, two lower extensions connected to one side of the main body plate, and side extensions connected to two opposite surfaces of the main body plate, the middle part of the support plate is provided with an upper pull rod pin hole, and the corner where the main body plate and the support plate are connected has a reinforcing rib;

[0008] The two lower extensions are clamped on both sides of the step of the driving shaft bearing hole.

[0009] As a preferred solution, the bolts include stud bolts also used to connect the rear box shell, and the stud bolts are linearly distributed on both sides of the two support plates along the extension direction of the side extension part.

[0010] As a preferred solution, the bolts include connecting bolts II located on the lower extension portion and used only to connect the power output housing and the upper pull rod connecting seat, and connecting bolts I located on the main plate and also used to connect the rear box housing.

[0011] As a preferred solution, the connecting bolts I and II on the same side are distributed along the extension direction of the lower extension part.

[0012] As a preferred solution, strip-shaped structural bosses are distributed equidistantly or unequally on the edge positions of both sides of the power output housing, and connecting holes are provided on the power output housing between adjacent strip-shaped structural bosses.

[0013] As a preferred solution, the mating surfaces of the power output housing and the upper pull rod connecting seat are drafted to form a connecting boss that matches the overall shape of the upper pull rod connecting seat.

[0014] As a preferred solution, the thickness of the connecting boss is the same as the thickness of the strip structure boss.

[0015] As a preferred solution, a bearing portion is integrally formed on the side surface of the power output housing, and the connecting boss extends to the surface of the bearing portion.

[0016] As a preferred solution, the outer side surface of the step of the driving shaft bearing hole is circular, and the opposite surfaces of the two lower extensions are provided with arc-shaped fitting portions that are matched with the step of the driving shaft bearing hole.

[0017] As a preferred solution, the flatness tolerance of the fitting surfaces of the power output housing and the upper pull rod connecting seat is less than 0.25 mm.

[0018] The beneficial effects of the utility model are:

[0019] Based on the defects of the prior art, a split power output housing connection structure for a tractor is provided. Compared with the existing structure:

[0020] 1. On the basis of the split mechanism, the power output housing and the upper pull rod connecting seat are improved in structure respectively, which can improve the strength after connection. It has the advantage of easy replacement of the split type and can ensure strength and stability.

[0021] 2. The upper pull rod connecting seat can be designed and manufactured by casting or welding. The structural form has been improved to form a structure and shape that matches the power output housing, which improves the processability of the parts, has better processability, and more scientific force.

[0022] 3. Reasonable distribution of bolts makes the connection between the power output housing and the upper tie rod connector more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the axial side of the utility model as a whole;

[0025] Figure 2 It is a schematic diagram of the upper pull rod connecting seat of the utility model;

[0026] Figure 3 It is a schematic diagram of the power output housing of the utility model;

[0027] Figure 4 It is a front view schematic diagram of the utility model.

[0028] Reference numerals:

[0029] 1. Power output housing, 101. Active shaft bearing hole step, 102. Bearing part;

[0030] 2. upper pull rod connecting seat, 201, main body plate, 202, support plate, 203, lower extension part, 204, side extension part, 205, reinforcing rib;

[0031] 3. Stud bolts, 4. Connecting bolts Ⅰ, 5. Connecting bolts Ⅱ;

[0032] 6. Strip structure boss, 7. Connecting hole, 8. Connecting boss. DETAILED DESCRIPTION

[0033] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0034] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be understood by people with ordinary skills in the field to which the utility model belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of this utility model do not express quantitative restrictions, but indicate the existence of at least one; the "first", "second" and "third" used in this article should not be regarded as restrictions on the order of components, but are only used to distinguish different components; "include" or "comprise" and other similar words indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0035] In order to more clearly describe the specific structural composition of the split power output housing connection structure for the tractor, Figure 1-4 Describe this embodiment:

[0036] like Figure 1 As shown, a split power output housing connection structure for a tractor is provided with bolt holes on the power output housing 1 and the upper tie rod connection seat 2, and the bolt holes facing each other are connected by bolts, and the middle of the power output housing 1 has a driving shaft bearing hole step 101. This structure connects two relatively independent parts, the cast power output housing and the upper tie rod connection seat of the welded structure, by assembly and use them as an assembly, and only a single damaged split structure needs to be replaced, which reduces the maintenance cost.

[0037] Specifically, the flatness tolerance of the mating surfaces of the processed power output housing 1 and the upper pull rod connecting seat 2 is less than 0.25 mm.

[0038] The present invention optimizes the structural strength and the external dimensions of the power output housing 1 and the upper pull rod connecting seat 2 respectively, thereby improving the strength after connection and enhancing the stability. The specific structure and connection of the two are described below:

[0039] like Figure 2As shown, a complete description of the upper pull rod connecting seat 2 is given: it includes a main body plate 201, two support plates 202 connected to the surface of the main body plate 201, two lower extension parts 203 connected to one side of the main body plate 201, and side extension parts 204 connected to two opposite surfaces of the main body plate 201, an upper pull rod pin hole is provided in the middle of the support plate 202, and a reinforcing rib 205 is provided at the corner where the main body plate 201 and the support plate 202 are connected; the two lower extension parts 203 are clamped on both sides of the step 101 of the driving shaft bearing hole; the upper pull rod pin hole is used to connect with the external upper pull rod pin, the design of the lower extension part 203 and the side extension part 204 fits the power output housing 1, reasonably increases the contact area, and improves stability, and the upper pull rod connecting seat 2 is integrally formed as a whole, and then the bolt holes are processed.

[0040] The two lower extensions 203 extend to both sides of the driving shaft bearing hole step 101 of the power output housing at about 1 / 3 below the centerline of the bearing hole; in the specific process, the outer side surface of the driving shaft bearing hole step 101 will be designed to be circular, and the opposite surfaces of the two lower extensions 203 have an arc-shaped fitting portion that is compatible with the driving shaft bearing hole step 101, and the gap between the arc-shaped fitting portion and the driving shaft bearing hole step 101 is designed to be about 10 mm.

[0041] See also Figure 1 or Figure 4 , the bolts used to connect the power output housing 1 and the upper pull rod connecting seat 2 are described in detail: including stud bolts 3, connecting the power output housing 1 and the upper pull rod connecting seat 2, and also used to connect the rear box housing (not shown in the figure), the stud bolts 3 are linearly distributed on both sides of the two support plates 202 along the extension direction of the side extension part 204.

[0042] The bolts include a connecting bolt II5 located on the lower extension 203 and only used to connect the power output housing 1 and the upper tie rod connection seat 2, and a connecting bolt I4 located on the main plate 201. The connecting bolt I4 not only connects the power output housing 1 and the upper tie rod connection seat 2, but is also used to connect the rear box housing (not shown in the figure); the connecting bolt I4 and the connecting bolt II5 on the same side are distributed along the extension direction of the lower extension 203. The bolts include a stud bolt 3, a connecting bolt I4 and a connecting bolt II5, which fit the shape of the upper tie rod connection seat 2 to form Figure 4 The "double cross" structure shown by the three dotted lines is reasonably distributed to make the connection between the power output housing and the upper pull rod connecting seat more stable.

[0043] See also Figure 3, the specific structure of the power output housing 1 is described: strip-shaped structural bosses 6 are distributed equidistantly or unequally at the edge positions on both sides of the power output housing 1, and connecting holes 7 are provided on the power output housing 1 between adjacent strip-shaped structural bosses 6. The mating surface of the power output housing 1 and the upper pull rod connecting seat 2 is drafted to form a connecting boss 8 that matches the overall shape of the upper pull rod connecting seat 2, and the thickness of the connecting boss 8 is the same as that of the strip-shaped structural boss 6; the design height of the connecting boss 8 is about 12mm, and the flatness tolerance of the table surface should be 0-0.1mm after mechanical processing; the side of the power output housing 1 is integrally formed with a bearing portion 102, and the connecting boss 8 extends to the surface of the bearing portion 102. The structure of the power output housing 1 is conducive to connecting the rear box housing (not shown in the figure) and has good stability.

[0044] In terms of the overall connection relationship, the power output housing 1, the upper pull rod connecting seat 2 and the rear box housing are connected by stud bolts 3, and the support plate 202 of the upper pull rod connecting seat 2 is connected to the upper pull rod pin shaft. When cracking and other use failures occur, they can be repaired by disassembling and replacing related parts, which greatly reduces the use and maintenance costs.

[0045] For the tractor aftermarket, the utility model has the advantages of being easy to modify and arrange.

[0046] The parts not described in detail in this embodiment are prior art.

[0047] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A split power output housing connection structure for a tractor, characterized in that: It comprises a power output housing (1); The power output housing (1) and the upper pull rod connecting seat (2) are both provided with bolt holes, and the bolt holes facing each other are connected by bolts. The middle part of the power output housing (1) is provided with a driving shaft bearing hole step (101); The upper pull rod connecting seat (2) comprises a main body plate (201), two support plates (202) connected to the surface of the main body plate (201), two lower extensions (203) connected to one side of the main body plate (201), and side extensions (204) connected to two opposite surfaces of the main body plate (201), an upper pull rod pin hole is provided in the middle of the support plate (202), and a reinforcing rib (205) is provided at the corner where the main body plate (201) and the support plate (202) are connected; The two lower extensions (203) are clamped on both sides of the driving shaft bearing hole step (101).

2. A split power output housing connection structure for a tractor according to claim 1, characterized in that: The bolts include stud bolts (3) also used to connect the rear box shell, and the stud bolts (3) are linearly distributed on both sides of the two support plates (202) along the extension direction of the side extension part (204).

3. The split power output housing connection structure for a tractor according to claim 1, characterized in that: The bolts include a connecting bolt II (5) located on the lower extension portion (203) and used only to connect the power output housing (1) and the upper pull rod connecting seat (2), and a connecting bolt I (4) located on the main plate (201) and also used to connect the rear box housing.

4. A split power output housing connection structure for a tractor according to claim 3, characterized in that: The connecting bolts I (4) and II (5) on the same side are distributed along the extension direction of the lower extension portion (203).

5. The split power output housing connection structure for a tractor according to claim 1, characterized in that: Strip-shaped structural bosses (6) are distributed at equal or unequal distances on the edge positions of both sides of the power output housing (1), and connecting holes (7) are provided on the power output housing (1) between adjacent strip-shaped structural bosses (6).

6. A split power output housing connection structure for a tractor according to claim 5, characterized in that: The mating surfaces of the power output housing (1) and the upper pull rod connecting seat (2) are drafted to form a connecting boss (8) that matches the overall shape of the upper pull rod connecting seat (2).

7. A split power output housing connection structure for a tractor according to claim 6, characterized in that: The thickness of the connecting boss (8) is the same as the thickness of the strip-shaped structural boss (6).

8. A split power output housing connection structure for a tractor according to claim 7, characterized in that: A bearing portion (102) is integrally formed on the side surface of the power output housing (1), and the connecting boss (8) extends to the surface of the bearing portion (102).

9. The split power output housing connection structure for a tractor according to claim 1, characterized in that: The outer side surface of the driving shaft bearing hole step (101) is circular, and the opposing surfaces of the two lower extension portions (203) are provided with arc-shaped fitting portions adapted to the driving shaft bearing hole step (101).

10. The split power output housing connection structure for a tractor according to claim 1, characterized in that: The flatness tolerance of the fitting surfaces of the power output housing (1) and the upper pull rod connecting seat (2) is less than 0.25 mm.

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