A non-highway mining wide-body inter-axle differential case

Abstract

The utility model relates to the technical field of axle differential shell, disclose a non -highway mining wide body axle differential shell, including the shell one, the shell one side wall is provided with the shell two, the shell one side wall fixedly connected with bearing sleeve, the shell two side wall fixedly connected with the spline, the shell one side wall is provided with the connecting assembly, the bearing sleeve inner wall is provided with the sealing assembly, the connecting assembly includes the locating rod and fixed shell, the locating rod side wall fixedly connected in the shell one side wall, the fixed shell side wall sliding connection is in the shell one inside, the fixed shell inside rotatoryly connected with the rotary handle, the rotary handle one end fixedly connected with the screw block, in the utility model, through rotating the rotary handle and drive screw block removal, compression spring makes the pusher extrude the ball and inserts the shell two, positioning rod auxiliary positioning simultaneously, to reach the effect that the shell one and shell two quick assembly, improve the assembly efficiency and the connection reliability of axle differential shell through above -mentioned structure.

Description

Technical Field

[0001] This utility model relates to the field of inter-axle differential housing technology, and in particular to a wide-body inter-axle differential housing for off-highway mining applications. Background Technology

[0002] As a core transportation equipment in harsh working conditions such as mining and infrastructure construction, the reliability of the transmission system of off-highway wide-body mining vehicles directly determines operational efficiency and operating costs. The inter-axle differential housing, as a key load-bearing component of the transmission system, is mainly used to enclose and protect the core components such as gears and bearings inside the differential. It also needs to achieve a stable connection with the drive shaft and housing, as well as seal and protect the internal lubricating oil. It must withstand the impact loads and torque transmission pressures during heavy vehicle operation, and resist the erosion of internal components by large amounts of dust, mud, and gravel in the mining environment. Therefore, its structural design must consider connection reliability, ease of assembly, and sealing durability, making it a crucial foundational component for ensuring the long-term stable operation of off-highway wide-body mining vehicles.

[0003] Currently, the housing connection of off-highway mining wide-body inter-axle differential housings in the industry generally adopts a bolt-fastened structure. The technical principle is as follows: the differential housing is divided into left and right halves. Bolt holes are evenly distributed at the flange connection surfaces of the two halves. During assembly, the two halves are first initially aligned using locating pins. Then, high-strength bolts are inserted into the bolt holes one by one. Nuts are tightened one by one to the specified torque using a torque wrench. The preload of the bolts makes the flange surfaces of the two halves fit tightly together, thereby achieving a fixed connection of the housing. To prevent lubricating oil leakage and the intrusion of external impurities at the joint surface, a rubber or metal sealing gasket is also laid between the flange surfaces. The preload of the bolts compresses the sealing gasket, causing it to elastically deform and fill the tiny gaps between the flange surfaces, forming a sealing protection.

[0004] However, bolt-fastened inter-axle differential housings have significant limitations in practical mining applications: Due to the frequent heavy-load starts, climbing, and turning operations required in mining environments, the transmission system experiences continuous vibration and impact loads. Long-term operation can lead to bolt fatigue and loosening. If not checked and tightened promptly, the gap between the flanges of the two halves of the housing will increase, not only compromising the sealing effect of the gaskets and causing internal lubricant leakage and external dust and mud intrusion, but also causing loose housing connections, unstable torque transmission, and even serious malfunctions such as bolt breakage and housing misalignment. Furthermore, bolted connections require aligning bolt holes one by one and tightening bolts in sequence, necessitating the use of specialized torque tools during assembly. A single assembly typically takes more than 30 minutes, especially in emergency field repair scenarios, where the lengthy assembly process significantly extends vehicle downtime and impacts mining efficiency. Therefore, a non-highway mining wide-body inter-axle differential housing is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a wide-body inter-axle differential housing for off-highway mining, which aims to improve the problems of long installation and disassembly time-consuming bolted connections, easy loosening due to vibration, and the need for additional sealing measures in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wide-body inter-axle differential housing for off-highway mining includes an outer shell, an outer shell two disposed on one side wall of the outer shell, a bearing sleeve fixedly connected to one side wall of the outer shell, a spline fixedly connected to the side wall of the outer shell two, a connecting assembly disposed on one side wall of the outer shell, and a sealing assembly disposed on the inner wall of the bearing sleeve. The connecting assembly includes a positioning rod and a fixed housing. The side wall of the positioning rod is fixedly connected to a side wall of the housing. The side wall of the fixed housing is slidably connected to the inside of the housing. A rotating handle is rotatably connected inside the fixed housing. A threaded block is fixedly connected to one end of the rotating handle. The side wall of the threaded block is threadedly connected to the inside of the fixed housing. A push block is slidably connected to the fixed housing. A compression spring is provided on the side wall of the threaded block. One end of the compression spring is fixedly connected to one end of the threaded block, and the other end of the compression spring is fixedly connected to one end of the push block. A ball bearing is provided inside the fixed housing.

[0007] As a further description of the above technical solution: The sealing assembly includes a sealing sleeve, the sidewall of which is slidably connected inside the bearing sleeve.

[0008] As a further description of the above technical solution: A sealing gasket is provided between the first outer shell and the second outer shell. The side wall of the positioning rod is slidably connected to the inside of the second outer shell. The side wall of the fixed shell is slidably connected to the inside of the second outer shell. The side wall of the push block is attached to the side wall of the ball bearing. The side wall of the ball bearing is slidably connected to the inside of the second outer shell.

[0009] As a further description of the above technical solution: The sealing sleeve sidewall is provided with a sealing lip, and the sealing lip sidewall is attached to the bearing sleeve sidewall.

[0010] As a further description of the above technical solution: The inner wall of the sealing sleeve is fixedly connected to a sealing edge, and the inner wall of the sealing edge is inclined inward.

[0011] As a further description of the above technical solution: The sealing sleeve is equipped with an annular spring inside, and an O-ring is provided on the inner wall of the sealing sleeve.

[0012] As a further description of the above technical solution: The inner wall of the sealing sleeve is fixedly connected to a second sealing edge, and the inner wall of the second sealing edge is inclined inward.

[0013] As a further description of the above technical solution: The O-ring is located in the middle of the sealing sleeve, the first sealing edge is located on the left side of the O-ring, and the second sealing edge is located on the right side of the O-ring.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the rotating handle drives the threaded block to move. The threaded block is pushed by the compression spring to squeeze the ball into the slot of the second outer shell. At the same time, the positioning rod assists in positioning, and the sealing gasket prevents leakage. This achieves the effects of quick assembly of the first outer shell and the second outer shell, vibration-proof loosening, and sealing of the mating surface. It solves the problems of long installation and disassembly time, easy loosening due to vibration, and the need for additional sealing measures in existing bolted connections. The above structure improves the assembly efficiency and connection reliability of the inter-shaft differential housing.

[0015] 2. In this utility model, the ring spring provides a continuous preload force to drive the sealing lip to tightly fit against the inner wall of the bearing sleeve. At the same time, the first sealing edge and the second sealing edge form a reverse pressure to prevent lubricating oil from leaking out. The O-ring seal further enhances the seal, thereby achieving a multi-protection sealing effect at the shaft hole. This solves the problem that existing shaft hole sealing structures are prone to lubricating oil leakage or intrusion of external impurities due to a single seal and insufficient preload force. The above structure improves the sealing reliability and service life of the shaft hole of the differential housing between shafts. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a wide-body inter-axle differential housing for off-highway mining proposed in this utility model. Figure 2 This is a side view of the structural schematic diagram of a wide-body inter-axle differential housing for off-highway mining proposed in this utility model. Figure 3 This is an exploded view of the structure of a wide-body inter-axle differential housing for off-highway mining proposed in this utility model. Figure 4 This is a schematic diagram of the structure of the fixed shell of a wide-body inter-axle differential housing for off-highway mining proposed in this utility model. Figure 5 This is a schematic diagram of the sealing sleeve of a wide-body inter-axle differential housing for off-highway mining proposed in this utility model.

[0017] Legend: 1. Outer shell one; 2. Outer shell two; 3. Bearing sleeve; 4. Sealing gasket; 5. Positioning rod; 6. Fixed shell; 7. Rotary handle; 8. Threaded block; 9. Compression spring; 10. Push block; 11. Ball bearing; 12. Sealing sleeve; 13. Sealing lip; 14. Ring spring; 15. Sealing edge one; 16. O-ring seal; 17. Sealing edge two; 18. Spline. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-4 This utility model provides an embodiment of a wide-body inter-axle differential housing for off-highway mining, comprising an outer shell 1, which encloses the core components of the differential, such as gears and bearings, providing protection and support. An outer shell 2 is provided on the side wall of the outer shell 1, and the outer shell 2 and the outer shell 1 cooperate to form a complete differential housing cavity, jointly bearing the transmission torque and sealing the internal lubricating oil. The combination of the two achieves the sealing and load-bearing functions of the differential housing. A bearing sleeve 3 is fixedly connected to the side wall of the outer shell 1, which is used to install the drive shaft bearing, providing stable rotation support for the drive shaft. The outer casing 2 has a spline 18 fixedly connected to its side wall. The spline 18 is used to achieve efficient torque transmission through tooth meshing, avoiding slippage during transmission and ensuring the stability of power transmission. The outer casing 1 has a connecting component on its side wall. The connecting component is used to achieve quick positioning and fastening connection between the outer casing 1 and the outer casing 2, replacing the traditional bolt structure to improve assembly efficiency and connection reliability. The bearing sleeve 3 has a sealing component on its inner wall. The sealing component is used to seal the fit clearance between the bearing sleeve 3 and the drive shaft to prevent internal lubricating oil from leaking out and external dust and mud from entering. The connecting assembly includes a positioning rod 5 and a fixed housing 6. The side wall of the positioning rod 5 is fixedly connected to the side wall of the outer housing 1. The positioning rod 5 is used for initial positioning when assembling the outer housing 1 and the outer housing 2. It works with the positioning holes of the outer housing 2 to achieve precise alignment and avoid misalignment of the housings during assembly, thus achieving the effect of quickly finding the assembly position. The side wall of the fixed housing 6 is slidably connected to the inside of the outer housing 1. A rotating handle 7 is rotatably connected inside the fixed housing 6. The rotating handle 7 is an operating component used to allow the operator to apply rotational force to drive the subsequent components. A threaded block 8 is fixedly connected to one end of the rotating handle 7. The side wall of the threaded block 8 is threadedly connected to the inside of the fixed housing 6. The threaded block 8 converts the rotational motion of the rotating handle 7 into its own axial linear motion through the threaded engagement with the fixed housing 6. The fixed housing 6 is provided with a slidingly connected push block 10. A compression spring 9 is provided on the side wall of the threaded block 8. The compression spring 9 is made of 60Si2MnA silicon manganese spring steel. The spring has an elastic modulus of 100-125 N / mm, ensuring that the compression spring 9 can provide sufficient squeezing force when engaged; the compression spring 9 can rebound smoothly when disassembled. One end of the compression spring 9 is fixedly connected to one end of the threaded block 8, and the other end of the compression spring 9 is fixedly connected to one end of the push block 10. The fixed shell 6 is equipped with a ball bearing 11, and the side wall of the ball bearing 11 is slidably connected to the inside of the fixed shell 6. The fixed shell 6 is provided with a limiting groove. The diameter of the ball bearing 11 is larger than the limiting groove inside the fixed shell 6, so that the ball bearing 11 can only move in a specific space inside the fixed shell 6. When the push block 10 is subjected to the pushing force transmitted by the threaded block 8 through the compression spring 9, the ball bearing 11 is squeezed towards the slot of the outer shell 2 inside the fixed shell 6. Under the squeezing action of the push block 10, it is inserted into the slot of the outer shell 2. The mechanical engagement achieves a tight connection between the outer shell 1 and the outer shell 2. Its spherical structure ensures a smooth engagement process and reduces friction damage with the slot. A sealing gasket 4, made of rubber, is provided between outer casing 1 and outer casing 2. Its function is to fill the minute gaps between the flange surfaces of outer casing 1 and outer casing 2, preventing lubricant leakage and the intrusion of external impurities at the mating surfaces. The side wall of the positioning rod 5 is slidably connected to the inside of outer casing 2. Through the sliding engagement of the positioning rod 5 and outer casing 2, precise alignment of outer casing 1 and outer casing 2 is ensured during assembly, preventing misalignment. The side wall of the fixed shell 6 is also slidably connected to the inside of outer casing 2. The sliding engagement of the fixed shell 6 and outer casing 2... The moving parts are engaged to ensure that the connecting components can smoothly enter the interior of the second outer shell 2, providing a basis for the engagement of the ball 11; the side wall of the push block 10 is attached to the side wall of the ball 11, and through the contact between the push block 10 and the ball 11, the pushing force of the push block 10 can be effectively transmitted to the ball 11, pushing the ball 11 into the slot; the side wall of the ball 11 is slidably connected to the interior of the second outer shell 2, and through the sliding engagement between the ball 11 and the second outer shell 2, the ball 11 can be smoothly engaged into the slot under the pressure, completing the fastening of the first outer shell 1 and the second outer shell 2.

[0020] Reference Figure 3 and Figure 5The sealing assembly includes a sealing sleeve 12, whose sidewall is slidably connected to the inside of the bearing sleeve 3. Through sliding contact with the bearing sleeve 3, it can adapt to the slight radial runout during the operation of the drive shaft, avoiding wear of the sealing structure due to rigid contact, and achieving a dynamic sealing effect. A sealing lip 13 is provided on the sidewall of the sealing sleeve 12. The sealing lip 13 is made of elastic rubber and its function is to tightly fit against the inner wall of the bearing sleeve 3, blocking the radial leakage channel of lubricating oil along the inner wall of the bearing sleeve 3. The sidewall of the sealing lip 13 fits against the sidewall of the bearing sleeve 3, and in conjunction with the elastic deformation of the sealing sleeve 12, it can always maintain stable contact with the inner wall of the bearing sleeve 3, even when... Even when the bearing sleeve 3 experiences slight displacement due to vibration, its own elasticity compensates for the gap, ensuring the sealing effect remains intact. A sealing edge 15 is fixedly connected to the inner wall of the sealing sleeve 12. This sealing edge 15 is made of wear-resistant rubber and is used to prevent lubricating oil from seeping into the outer side of the shaft hole from the left side of the differential housing. Its inner wall is inclined inwards. This inclined structure generates reverse pressure when the drive shaft rotates. When lubricating oil attempts to flow outwards along the shaft surface, the inclined sealing edge 15 resists the lubricating oil and guides it back into the differential housing, thus reducing lubricating oil leakage. The sealing sleeve 12 is internally equipped with… A ring spring 14, made of elastic metal, provides continuous preload to the sealing sleeve 12 and sealing lip 13. Combined with the elastic properties of the sealing sleeve 12, this ensures that the sealing lip 13 remains tightly fitted to the inner wall of the bearing sleeve 3, preventing loosening due to elastic fatigue after prolonged use and thus guaranteeing the durability of the sealing performance. An O-ring 16, made of nitrile rubber, is installed on the inner wall of the sealing sleeve 12. This O-ring fills the tiny gap between the inner wall of the sealing sleeve 12 and the surface of the drive shaft, blocking the axial leakage path of lubricating oil along the shaft surface. The inner wall of the sealing sleeve 12 is fixedly connected to... Sealing edge 17, made of the same material as sealing edge 15, is used to prevent lubricating oil in the right side of the differential housing from seeping into the outside of the shaft hole. Its inner wall is inclined inward, which can also generate reverse pressure when the drive shaft rotates, intercepting the lubricating oil on both sides and further reducing the risk of leakage. O-ring 16 is located in the middle of sealing sleeve 12, sealing edge 15 is located to the left of O-ring 16, and sealing edge 17 is located to the right of O-ring 16. The three are distributed along the inner wall of sealing sleeve 12. Together with the preload provided by the ring spring 14 and the radial seal of the sealing lip 13, they form a multi-layer sealing protection structure.

[0021] Working principle: When using this equipment, the outer shell 1 and the outer shell 2 are combined to form an integral structure. The bearing sleeve 3 and the spline 18 respectively undertake the functions of shaft support and power transmission. The connecting component realizes the quick and reliable connection of the two outer shells, and the sealing component ensures the sealing performance at the shaft hole.

[0022] During the connection and fixing, the positioning rod 5 on the side wall of outer shell 1 is inserted into the corresponding hole of outer shell 2 to achieve initial positioning. At the same time, the fixing shell 6 enters the interior of outer shell 2. Then, the rotating handle 7 is rotated to drive the threaded block 8 to move inside the fixing shell 6. The threaded block 8 pushes the push block 10 to squeeze the ball 11 through the compression spring 9, so that the ball 11 is locked into the groove on the inner wall of outer shell 2, completing the fastening connection between outer shell 1 and outer shell 2. The compression spring 9 can buffer vibration and impact to prevent the ball 11 from loosening. The sealing gasket 4 between outer shell 1 and outer shell 2 can prevent lubricating oil leakage and external impurities from entering at the joint surface.

[0023] Regarding shaft hole sealing, the ring spring 14 provides continuous preload to the sealing sleeve 12, ensuring that the sealing lip 13 fits tightly against the inner wall of the bearing sleeve 3, blocking the radial leakage channel; the sealing edge 15 and sealing edge 17 on the inner wall are inclined inward, forming reverse pressure when the shaft rotates, respectively blocking the leakage of lubricating oil from the left and right sides; the O-ring seal 16 in the middle further enhances the sealing effect, forming multiple layers of protection, effectively preventing lubricating oil leakage and external dust, mud, water and other impurities from entering the differential housing.

Claims

1. An off-highway mining wide base axle inter-axle differential case comprising a case one (1), characterized in that: The outer shell 1 (1) is provided with an outer shell 2 (2) on its side wall. The outer shell 1 (1) is fixedly connected with a bearing sleeve (3). The outer shell 2 (2) is fixedly connected with a spline (18). The outer shell 1 (1) is provided with a connecting component on its side wall. The bearing sleeve (3) is provided with a sealing component on its inner wall. The connecting assembly includes a positioning rod (5) and a fixed shell (6). The side wall of the positioning rod (5) is fixedly connected to the side wall of the outer shell (1). The side wall of the fixed shell (6) is slidably connected to the inside of the outer shell (1). A rotating handle (7) is rotatably connected inside the fixed shell (6). A threaded block (8) is fixedly connected to one end of the rotating handle (7). The side wall of the threaded block (8) is threadedly connected to the inside of the fixed shell (6). A push block (10) is slidably connected to the fixed shell (6). A compression spring (9) is provided on the side wall of the threaded block (8). One end of the compression spring (9) is fixedly connected to one end of the threaded block (8). The other end of the compression spring (9) is fixedly connected to one end of the push block (10). A ball bearing (11) is provided inside the fixed shell (6).

2. An off-highway mining wide-base inter-axle differential case, as described in claim 1, wherein: The sealing assembly includes a sealing sleeve (12), the sidewall of which is slidably connected inside the bearing sleeve (3).

3. A non-highway mining wide base axle differential case, as described in claim 1, wherein: A sealing gasket (4) is provided between the first outer shell (1) and the second outer shell (2). The side wall of the positioning rod (5) is slidably connected to the inside of the second outer shell (2). The side wall of the fixing shell (6) is slidably connected to the inside of the second outer shell (2). The side wall of the push block (10) is attached to the side wall of the ball (11). The side wall of the ball (11) is slidably connected to the inside of the second outer shell (2).

4. An off-highway mining wide-base inter-axle differential case, as described in claim 2, wherein: The sealing sleeve (12) has a sealing lip (13) on its side wall, and the side wall of the sealing lip (13) is attached to the side wall of the bearing sleeve (3).

5. A non-highway mining wide base axle differential case as in claim 4, wherein: The inner wall of the sealing sleeve (12) is fixedly connected to a sealing edge (15), and the inner wall of the sealing edge (15) is inclined inward.

6. A non-highway mining wide-base axle differential case as in claim 5, wherein: The sealing sleeve (12) is provided with an annular spring (14) inside, and the inner wall of the sealing sleeve (12) is provided with an O-ring (16).

7. A non-highway mining wide-base axle differential case as in claim 6, wherein: The inner wall of the sealing sleeve (12) is fixedly connected to a sealing edge two (17), and the inner wall of the sealing edge two (17) is inclined inward.

8. An off-highway mining wide-base inter-axle differential case, as described in claim 7, wherein: The O-ring (16) is located in the middle of the sealing sleeve (12), the first sealing edge (15) is located on the left side of the O-ring (16), and the second sealing edge (17) is located on the right side of the O-ring (16).

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