Commercial vehicle main speed reducer shell assembly

Abstract

The utility model discloses a commercial vehicle main speed reducer shell assembly, which belongs to the technical field of main speed reducer shell assemblies and comprises a main speed reducer shell integrally cast and formed by aluminum alloy, and two oppositely arranged fixed bearing covers are integrally cast and formed on the main speed reducer shell. A guide bearing supporting seat capable of supporting the guide bearing is integrally cast and molded in the main reducer shell; and the two movable bearing covers which are made of aluminum alloy and can be respectively buckled with the two fixed bearing covers are also included. The whole body is cast by aluminum alloy, the self weight is obviously reduced, and the advantage of light weight is obvious; according to the main reducer shell assembly, the guide bearing supporting seat is integrally cast and formed, so that a transmission system of the main reducer shell is arranged in a straddle mode, stable and reliable operation of the differential assembly is guaranteed, the stress of the main reducer shell is uniform, the problem that the main reducer shell is broken due to uneven stress is effectively solved, and the bearing performance and the supporting strength of the main reducer shell assembly are remarkably improved. The overall structure is simple, implementation is easy, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of a main reducer shell assembly, in particular to a main reducer shell assembly for a commercial vehicle. Background Art

[0002] The function of the main reducer is to reduce speed, increase torque and change the direction of power output. The output power of the engine is certain. When the transmission speed is reduced by the main reducer, a higher output torque can be obtained, thereby obtaining a greater driving force. In addition, the function of changing the power output direction of the main reducer can realize the differential between the left and right wheels or the middle and rear axles. The function of the main reducer housing is to organize the transmission parts of the reducer and enable the differential to perform its function. When the car is running, the reducer is subjected to large radial and axial forces, and the increased torque must be transmitted to the drive wheels through the differential and half-axles. The alternating loads composed of various forces and moments act on the reducer housing through the shaft and bearings.

[0003] The demand for lightweight design of automobiles is becoming increasingly significant, especially the control of energy consumption and emissions of heavy-duty commercial vehicles is of great significance to the emission reduction target. Among them, the main reducer assembly, as the key assembly for power transmission of heavy-duty commercial vehicles, plays a key role, and the main reducer shell assembly, as the core load-bearing support component of the main reducer assembly, is responsible for the torque and load bearing responsibility, ensuring that the main reducer can transmit power reliably and stably. The lightweight design of the main reducer shell assembly can achieve the goal of reducing the weight of the entire vehicle, thereby achieving the effect of energy saving and consumption reduction.

[0004] The traditional main reducer shell assembly is cast with ductile iron, which is heavy and does not conform to the principle of lightweight design. In addition, the transmission system of the main reducer shell is supported on one end, and the uneven force on the main reducer shell can easily lead to breakage, and the load-bearing and torsional resistance performance of the structure is poor. Utility Model Content

[0005] In order to solve the problems that the traditional main reducer shell assembly is cast by ductile iron, which is heavy and does not conform to the lightweight design principle; and the transmission system of the main reducer shell is supported at one end, the main reducer shell is subjected to uneven force and is prone to breakage, and the load-bearing and torsion-resistant structural performance is poor, the utility model provides a main reducer shell assembly for commercial vehicles.

[0006] The utility model is realized by the following technical solutions:

[0007] A main reducer shell assembly for a commercial vehicle includes a main reducer shell integrally cast from aluminum alloy, two fixed bearing caps disposed opposite to each other integrally cast on the main reducer shell; a guide bearing support seat capable of supporting the guide bearing is integrally cast inside the main reducer shell; and two movable bearing caps made of aluminum alloy that can be respectively buckled and installed with the two fixed bearing caps.

[0008] A further improvement of the utility model is that a bolt hole is provided on the movable bearing cover, and a bearing cover press-fitting bolt which can be connected and installed with the fixed bearing cover is passed through the bolt hole.

[0009] A further improvement of the utility model is that pins are integrally cast at both ends of the fixed bearing cover, and a pin hole capable of positioning and inserting with the pin is opened on the movable bearing cover.

[0010] A further improvement of the utility model is that the connection line of the two pin holes is located on one side of the connection line of the two bolt holes.

[0011] A further improvement of the utility model is that a positioning boss is integrally cast on the fixed bearing cover, a positioning hole is formed on the positioning boss, and a positioning shaft capable of positioning and engaging with the bearing adjustment nut is passed through the positioning hole.

[0012] A further improvement of the utility model is that the positioning boss is arranged on the outer side of the movable bearing cover.

[0013] A further improvement of the utility model is that the positioning boss is arranged on one side of the axial midsection of the movable bearing cover.

[0014] A further improvement of the utility model is that the number of the support seat connecting plates is four, and they are distributed at an interval of 60 degrees on the upper inner part of the main reducer shell.

[0015] A further improvement of the utility model is that a plurality of shell reinforcement ribs are arranged at intervals on the outer side of the main reduction shell.

[0016] A further improvement of the utility model is that a bearing cover rib plate is connected and supported between the fixed bearing cover and the main reducer housing, and the bearing cover rib plate is inclined inwardly.

[0017] It can be seen from the above technical solutions that the beneficial effects of the utility model are:

[0018] The whole is made of aluminum alloy casting, which significantly reduces its own weight and has significant advantages in light weight; the integral casting has a guide bearing support seat, so that the transmission system of the main reducer housing is arranged in a straddle type, ensuring the stable and reliable operation of the differential assembly, and the main reducer housing is evenly stressed, effectively improving the main reducer housing fracture problem caused by uneven stress, and significantly improving the bearing performance and support strength of the main reducer housing assembly. The overall structure is simple, easy to implement, and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description 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.

[0020] Figure 1 It is a schematic structural diagram from the first perspective of a specific implementation method of the utility model.

[0021] Figure 2 It is a front view schematic diagram of a specific implementation method of the utility model.

[0022] Figure 3 It is a schematic structural diagram of a second viewing angle of a specific implementation method of the utility model.

[0023] Figure 4 It is a schematic structural diagram of a movable bearing cover from a first perspective according to a specific implementation mode of the utility model.

[0024] Figure 5 This is a schematic structural diagram of the movable bearing cover from a second viewing angle according to a specific implementation manner of the utility model.

[0025] In the attached drawings: 1. main reducer casing, 11. casing reinforcement rib, 2. fixed bearing cover, 21. bearing cover rib plate, 3. movable bearing cover, 31. positioning boss, 32. positioning hole, 33. pin hole, 34. bolt hole, 4. bearing cover press bolt, 5. guide bearing support seat, 51. support seat connecting plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0027] like Figure 1-5 As shown, an optional embodiment of the utility model discloses a main reducer shell assembly for a commercial vehicle, including a main reducer shell 1 integrally cast from aluminum alloy, on which two fixed bearing covers 2 made of aluminum alloy and arranged opposite to each other on the left and right are integrally cast; a guide bearing support seat 5 made of aluminum alloy and capable of supporting the guide bearing is integrally cast inside the main reducer shell 1; and two movable bearing covers 3 made of aluminum alloy that can be respectively buckled and installed with the two fixed bearing covers 2.

[0028] The whole is cast with aluminum alloy, which significantly reduces its own weight and has significant advantages in light weight. The integral casting has a guide bearing support seat 5, which makes the transmission system of the main reducer housing 1 arranged in a straddle type, ensuring the stable and reliable operation of the differential assembly, and the main reducer housing 1 is evenly stressed, effectively improving the fracture problem of the main reducer housing 1 caused by uneven stress, and significantly improving the bearing performance and support strength of the main reducer housing assembly. The overall structure is simple, easy to implement, and practical.

[0029] The movable bearing cover 3 has bolt holes 34 at both ends, and the bolt holes 34 are penetrated with bearing cover press-fit bolts 4 that can be connected and installed with the fixed bearing cover 2. The fixed bearing cover 2 has threaded holes that are screwed with the bearing cover press-fit bolts 4, so that the movable bearing cover 3 can be easily disassembled and assembled.

[0030] Among them, the fixed bearing cover 2 has a pin shaft integrally cast at both ends, and the movable bearing cover 3 is provided with a pin hole 33 that can be positioned and inserted with the pin shaft. By positioning and inserting the pin shaft on the fixed bearing cover 2 and the pin hole 33 on the movable bearing cover 3, the movable bearing cover 3 and the fixed bearing cover 2 can be accurately buckled, ensuring the convenience of installing the bearing cover press bolt 4.

[0031] The connecting line of the two pin holes 33 is located on one side of the connecting line of the two bolt holes 34. The movable bearing cover 3 is effectively installed to prevent misalignment, and the movable bearing cover 3 and the fixed bearing cover 2 are conveniently installed in a buckled manner.

[0032] Among them, a positioning boss 31 is integrally cast on the fixed bearing cover 2, and a positioning hole 32 is opened on the positioning boss 31. A positioning shaft capable of positioning and engaging the bearing adjustment nut is passed through the positioning hole 32. The positioning shaft passed through the positioning hole 32 can realize the positioning of the toothed bearing adjustment nut, so as to realize the convenient and flexible adjustment of the bearing preload.

[0033] The positioning boss 31 is arranged on the outer side of the movable bearing cover 3, which is convenient for the installation of the positioning shaft and has the function of preventing reverse installation.

[0034] Furthermore, the positioning boss 31 is arranged on one side of the axial midsection of the movable bearing cover 3 and is arranged close to the outer end of the bolt hole 34 (inclined at 45 degrees). The molding space of the positioning boss 31 is enlarged to ensure its good structural strength.

[0035] like Figure 2 As shown, there are four support seat connecting plates 51, which are distributed at intervals of 60 degrees in the upper part of the main reducer housing 1 and connected to the upper wall of the main reducer housing 1. The two support seat connecting plates 51 at the bottom are arranged horizontally, so as to realize a reliable connection of the guide bearing support seat 5, effectively reduce the weight, and realize a lightweight design.

[0036] Among them, Figure 1 ,3 As shown, a plurality of shell reinforcement ribs 11 are arranged at intervals on the outside of the main reducer shell 1. The shell reinforcement ribs 11 are transitioned through rounded corners to ensure the overall structural strength and lightness of the main reducer shell 1.

[0037] Among them, Figure 1 As shown, a bearing cover rib plate 21 is connected and supported between the fixed bearing cover 2 and the main reducer housing 1. The bearing cover rib plate 21 is inclined inward and forms an angle of 45 degrees with the axial midsection of the fixed bearing cover 2. The inclined bearing cover rib plate 21 effectively strengthens the structure of the connection between the fixed bearing cover 2 and the main reducer housing 1, ensuring the reliability of use.

[0038] The main reducer shell assembly of this commercial vehicle is made of aluminum alloy casting as a whole, which significantly reduces its own weight and has significant lightweight advantages; the guide bearing support seat 5 is integrally cast, so that the transmission system of the main reducer shell 1 is arranged in a straddle type, ensuring the stable and reliable operation of the differential assembly, and the main reducer shell 1 is evenly stressed, effectively improving the fracture problem of the main reducer shell 1 caused by uneven stress, and significantly improving the bearing performance and support strength of the main reducer shell assembly. The overall structure is simple, easy to implement, and practical.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0040] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A commercial vehicle main shell reduction assembly, characterized in that: The invention comprises a main reducer housing (1) integrally cast from an aluminum alloy, wherein two fixed bearing covers (2) arranged opposite to each other are integrally cast on the main reducer housing (1); a guide bearing support seat (5) capable of supporting the guide bearing is integrally cast inside the main reducer housing (1); and two movable bearing covers (3) made of an aluminum alloy capable of being respectively buckled and mounted with the two fixed bearing covers (2).

2. The commercial vehicle main shell reduction assembly according to claim 1, characterized in that: The movable bearing cover (3) is provided with a bolt hole (34), and a bearing cover press-fitting bolt (4) capable of being connected and installed with the fixed bearing cover (2) is passed through the bolt hole (34).

3. The commercial vehicle main shell reduction assembly according to claim 2, characterized in that: Pin shafts are integrally cast at both ends of the fixed bearing cover (2), and a pin hole (33) capable of being positioned and inserted with the pin shaft is provided on the movable bearing cover (3).

4. The main shell reduction assembly of a commercial vehicle according to claim 3, characterized in that: The connecting line of the two pin holes (33) is located on one side of the connecting line of the two bolt holes (34).

5. The commercial vehicle main shell reduction assembly according to claim 1, characterized in that: A positioning boss (31) is integrally cast on the fixed bearing cover (2), a positioning hole (32) is provided on the positioning boss (31), and a positioning shaft capable of positioning and engaging with a bearing adjustment nut is passed through the positioning hole (32).

6. The commercial vehicle main shell reduction assembly according to claim 5, characterized in that: The positioning boss (31) is arranged on the outer side of the movable bearing cover (3).

7. The commercial vehicle main shell reduction assembly according to claim 6, characterized in that: The positioning boss (31) is arranged on one side of the axial midsection of the movable bearing cover (3).

8. The commercial vehicle main shell reduction assembly according to claim 1, characterized in that: There are four support seat connection plates (51) which are distributed at intervals of 60 degrees in the upper inner part of the main reducer casing (1).

9. The commercial vehicle main shell reduction assembly according to claim 1, characterized in that: A plurality of casing reinforcement ribs (11) are arranged at intervals on the outside of the main reducer casing (1).

10. The commercial vehicle main shell reduction assembly according to claim 1, characterized in that: A bearing cover rib plate (21) is connected and supported between the fixed bearing cover (2) and the main reducer casing (1), and the bearing cover rib plate (21) is inclined inwardly.

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