Integrated inter-axle shell and intermediate axle speed reducer assembly

Abstract

The utility model discloses a one-piece interaxial shell and an intermediate axle reducer assembly, and relates to the technical field of automobile parts, the one-piece interaxial shell comprises a hollow cylindrical body, the upper end of the cylindrical body shrinks inwards to form a bearing seat, the lower end of the inner side wall of the bearing seat is provided with a limiting ring groove used for press fitting of a bearing, and the lower end of the inner side wall of the bearing seat is provided with a limiting ring. And a limiting convex ring for pressing the oil seal is arranged at the upper end of the inner side wall of the bearing seat. According to the utility model, the risks of oil leakage of the junction surface and bolt loosening are reduced, and the weight of the reducer assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a connected inter-axle housing and mid-bridge speed reducer assembly. Background Art

[0002] The housing of the inter-axle differential assembly in the traditional mid-axle reducer assembly is connected to the inter-axle outer housing by bolts via the oil seal seat. It is a split structure and the installation method is as follows:

[0003] 1. Press the oil seal into the oil seal seat first;

[0004] 2. Then press the outer ring of the bearing into the inter-shaft housing;

[0005] 3. Press the bearing core onto the bearing differential;

[0006] 4. Connect the oil seal seat and the shaft housing together, apply glue to the joint surface to prevent oil leakage, and connect them together with bolts;

[0007] 5. Place the bearing differential under the inter-axle housing, then put the O-ring on the flange and press it onto the bearing differential. Press the cover plate on the flange and connect it with bolts to prevent it from loosening.

[0008] This method has the following defects: first, the oil seal seat and the shaft outer shell need to be processed separately before assembly. Since it is a separate processing of a single component, the assembly after processing will also have behavioral tolerances, so glue assembly is required during the assembly process. At the same time, the assembly is cumbersome, and oil leakage is prone to occur on the joint surface. The bolt connection requires additional bolt components and processes, which is more troublesome.

[0009] In addition, in order to ensure its strength, the material is cast from QT450-10. Not only is the product heavy, but the separate processing of the oil seal seat and the inter-shaft outer shell requires separate processing allowances to be reserved, and tolerances will appear during the separate processing. Utility Model Content

[0010] In view of the defects existing in the prior art, the purpose of the present invention is to provide a one-piece inter-axle housing and mid-bridge reducer assembly, which reduces the risk of oil leakage on the joint surface and loosening of bolts, and reduces the weight of the reducer assembly.

[0011] In order to achieve the above purpose, the technical solution adopted by the utility model is: a one-piece inter-axial housing, including a hollow cylindrical body, the upper end of the cylindrical body is reduced inward to form a bearing seat, the lower end of the inner side wall of the bearing seat is provided with a limiting ring groove for press-fitting the bearing, and the upper end of the inner side wall of the bearing seat is provided with a limiting convex ring for press-fitting the oil seal.

[0012] A further improvement is that the cylindrical body and the bearing seat are cast as an integral structure and are both made of QT500-7 ductile iron.

[0013] A further improvement is that the lower end of the cylindrical body is bent outward to form a flange, and the flange is provided with a plurality of connecting holes.

[0014] A further improvement is that a first boss is provided on the outer side wall of the cylindrical body, and a first through hole is provided at the upper end of the first boss.

[0015] A further improvement is that: the outer side wall of the cylindrical body is provided with a second boss opposite to the first boss, and the first boss is higher than the second boss; and a second through hole is provided at the upper end of the second boss.

[0016] A further improvement is that the outer side wall of the cylindrical body is provided with a protrusion, and the upper end of the protrusion extends to the bearing seat.

[0017] A further improvement is that a cavity is provided at a position of the inner side wall of the cylindrical body opposite to the protrusion.

[0018] A further improvement is that the upper end opening of the bearing seat is reduced in diameter inward to form an annular limiting edge.

[0019] The utility model also provides a mid-bridge reducer assembly, comprising a mid-bridge main reducer housing and a cylindrical gear housing mounted on the mid-bridge main reducer housing, wherein the above-mentioned connected inter-axle housing is mounted on the cylindrical gear housing.

[0020] Further improvements are: the cylindrical gear housing is connected to the connecting hole of the cylindrical body by bolts; the bearing and oil seal are press-fitted into the bearing seat, and the input end of the flange is inserted into the bearing seat.

[0021] The beneficial effects of the present invention are:

[0022] 1. This utility model redesigns the mold without changing the original functional principle. The oil seal and bearing positions are still used to connect the bearing seat and the shaft housing. The one-piece structure does not require separate machining allowances, and there is no behavioral tolerance during the construction process. The one-piece structure has no joint surface, so there are no bolt components and processes, which completely eliminates the risks of oil seepage on the joint surface and bolt loosening. It reduces process complexity, eliminates the need for glue application and assembly, and reduces costs.

[0023] 2. In this utility model, the cylindrical body and bearing seat are cast as an integral structure, and both are made of QT500-7 ductile iron. This change in material ensures strength while reducing weight by 3kg. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a three-dimensional diagram of the inter-axle housing in the embodiment of the utility model;

[0025] Figure 2 This is a front view of the inter-axle housing in the embodiment of the utility model;

[0026] Figure 3 This is a rear view of the inter-axle housing in the embodiment of the utility model;

[0027] Figure 4 This is a left side view of the inter-axle housing in the embodiment of the utility model;

[0028] Figure 5 This is a right side view of the inter-axle housing in the embodiment of the utility model;

[0029] Figure 6 This is a top view of the inter-axle housing in the embodiment of the utility model;

[0030] Figure 7 for Figure 6 The turning cross-section view in the AA direction;

[0031] Figure 8 This is a bottom view of the inter-axle housing in the embodiment of the utility model;

[0032] Figure 9 for Figure 8 Cross-sectional view along the BB direction;

[0033] Figure 10 A perspective view of the mid-bridge reducer assembly in an embodiment of the present utility model;

[0034] Figure 11 This is a front view of the mid-bridge reducer assembly in the embodiment of the present utility model;

[0035] Figure 12 It is a side view of the mid-bridge reducer assembly in an embodiment of the present utility model.

[0036] Reference numerals:

[0037] 1-One-piece inter-axle housing; 101-Cylindrical body; 102-Bearing seat; 103-Annular limiting edge; 104-Flanged edge; 105-First boss; 106-First through hole; 107-Second boss; 108-Second through hole; 109-Protrusion; 110-Connecting hole; 111-Cavity; 112-Limiting ring groove; 113-Limiting convex ring;

[0038] 2-mid-bridge main reducer housing;

[0039] 3-cylindrical gear housing; 31-bolt;

[0040] 4- Flange. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0042] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0044] The following description of the embodiments of the present invention is provided in conjunction with the accompanying drawings to further describe the specific embodiments of the present invention so that the technical solutions and beneficial effects of the present invention are more clearly understood. The following description of the embodiments with reference to the accompanying drawings is for illustrative purposes only and is intended to explain the present invention, but is not to be construed as limiting the present invention.

[0045] See also Figures 1 to 9As shown, an embodiment of the present invention provides a one-piece inter-axial housing, comprising a hollow cylindrical body 101, the upper end of the cylindrical body 101 is tapered inward to form a bearing seat 102, the lower end of the inner side wall of the bearing seat 102 is provided with a limiting ring groove 112 for press-fitting the bearing, and the upper end of the inner side wall of the bearing seat 102 is provided with a limiting convex ring 113 for press-fitting the oil seal. Specifically, the cylindrical body 101 and the bearing seat 102 are cast as an integral structure and are both made of QT500-7 ductile iron. The lower end of the cylindrical body 101 is bent outward to form a flange 104, and the flange 104 is provided with a plurality of connecting holes 110. The outer side wall of the cylindrical body 101 is provided with a first boss 105, and the upper end of the first boss 105 is provided with a first through hole 106. The outer wall of the cylindrical body 101 is provided with a second boss 107, which is opposite the first boss 105 and is higher than the second boss 107. A second through-hole 108 is formed at the upper end of the second boss 107. A protrusion 109 is provided on the outer wall of the cylindrical body 101, and the upper end of the protrusion 109 extends to the bearing seat 102. A cavity 111 is provided on the inner wall of the cylindrical body 101, opposite the protrusion 109. The upper opening of the bearing seat 102 is tapered inward to form an annular retaining edge 103.

[0046] See also Figures 10 to 12 As shown, the embodiment of the present invention also provides a mid-bridge reducer assembly, including a mid-bridge main reducer housing 2 and a cylindrical gear housing 3 installed on the mid-bridge main reducer housing 2, and the above-mentioned connected inter-axle housing 1 is installed on the cylindrical gear housing 3.

[0047] Specifically, the cylindrical gear housing 3 is connected to the connecting hole 110 of the cylindrical body 101 through bolts 31 ; the bearing and oil seal are press-fitted into the bearing seat 102 , and the input end of the flange 4 is inserted into the bearing seat 102 .

[0048] The installation method of the utility model's inter-axle housing is as follows:

[0049] 1 Press the oil seal and the outer circle of the bearing into the integrated shaft housing;

[0050] 2. Then press the bearing core onto the bearing differential;

[0051] 3. Place the bearing differential under the inter-axle housing and press the flange onto the bearing differential. Press the flange with a cover plate and connect it with bolts to prevent it from loosening.

[0052] In the description of the specification, reference to the terms "one embodiment," "preferably," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. The schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0053] Through the description of the above structure and principle, technical personnel in the relevant technical field should understand that the present invention is not limited to the above specific implementation methods, and improvements and substitutions based on the present invention using the well-known technology in the field all fall within the scope of protection of the present invention and should be defined by the claims.

Claims

1. A one-piece inter-axle housing, comprising a hollow cylindrical body (101), characterized in that: The upper end of the cylindrical body (101) is inwardly tapered to form a bearing seat (102); a limiting ring groove (112) for press-fitting a bearing is provided at the lower end of the inner side wall of the bearing seat (102); and a limiting convex ring (113) for press-fitting an oil seal is provided at the upper end of the inner side wall of the bearing seat (102).

2. The one-piece inter-axle housing according to claim 1, characterized in that: The cylindrical body (101) and the bearing seat (102) are cast into an integral structure and are both made of QT500-7 ductile iron.

3. The one-piece inter-axle housing according to claim 1, characterized in that: The lower end of the cylindrical body (101) is bent outward to form a flange (104), and the flange (104) is provided with a plurality of connection holes (110).

4. The one-piece inter-axle housing according to claim 1, characterized in that: The outer side wall of the cylindrical body (101) is provided with a first boss (105), and the upper end of the first boss (105) is provided with a first through hole (106).

5. The one-piece inter-axle housing according to claim 4, characterized in that: The outer side wall of the cylindrical body (101) is provided with a second boss (107) opposite to the first boss (105), and the first boss (105) is higher than the second boss (107); the upper end of the second boss (107) is provided with a second through hole (108).

6. The one-piece inter-axle housing according to claim 1, characterized in that: The outer side wall of the cylindrical body (101) is provided with a protrusion (109), and the upper end of the protrusion (109) extends to the bearing seat (102).

7. The one-piece inter-axle housing according to claim 6, characterized in that: A cavity (111) is provided on the inner side wall of the cylindrical body (101) at a position opposite to the protrusion (109).

8. The one-piece inter-axle housing according to claim 1, characterized in that: The upper opening of the bearing seat (102) is inwardly tapered to form an annular limiting edge (103).

9. A mid-bridge reducer assembly, comprising a mid-bridge main reducer housing (2) and a cylindrical gear housing (3) mounted on the mid-bridge main reducer housing (2), characterized in that: The cylindrical gear housing (3) is mounted with a connected inter-axle housing (1) as claimed in any one of claims 1 to 8.

10. The mid-bridge reducer assembly according to claim 9, characterized in that: The cylindrical gear housing (3) is connected to the connecting hole (110) of the cylindrical body (101) via bolts (31); a bearing and an oil seal are press-fitted into the bearing seat (102), and the input end of the flange (4) is inserted into the bearing seat (102).

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