Hydraulic expansion hub convenient to disassemble and assemble
Through the light hole gap matching of the hydraulic expansion and hydraulic oil cavity design, the installation difficulty and disassembly of the coupling hub and the transmission shaft are solved, and the rapid installation and disassembly are achieved, and the material penetration is prevented through the copper plating layer, which improves the improvement of Convenient and safety of disassembly.
Patent Information
- Application Number
- CN202420651072.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The installation and disassembly of existing coupling hubs and drive shafts is difficult, especially when the materials penetrate each other, it is difficult to disassemble and damage the drive shafts.
The hydraulic expansion and tightening wheel hub design is adopted, and the hydraulic oil chamber is quickly installed and disassembled through the optical hole gap matching and hydraulic oil chamber. The hydraulic oil is injected with a high-pressure oil pump to closely combine the inner ring with the transmission shaft, and the pressure in the oil chamber is sealed by locking the hydraulic valve to release it. Restoring the original size after pressure is easy to disassemble, and a copper layer on the inner ring surface prevents material penetration.
The rapid installation and disassembly of the hub and the transmission shaft are realized, avoiding the transmission shaft damage, simplifying the installation process and improving the convenience and safety of disassembly.
Smart Images
Figure CN222185526U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wheel hubs, and more specifically to a hydraulic expansion wheel hub which is easy to disassemble and assemble. Background Art
[0002] At present, the connection between the coupling hub and the transmission shaft generally adopts the interference fit plus key connection method, or the clearance fit plus mechanical expansion connection method. Both connection methods have the disadvantages of being difficult to install, difficult to disassemble later, and damaging the transmission shaft after disassembly.
[0003] The main reason for the difficulty in installation is that the interference fit plus key method requires the hub to be heated and pre-treated, while the clearance fit plus mechanical tightening method requires a special structure to apply a pressing force in the axial direction to achieve the purpose of tightening and transmitting torque, both of which are time-consuming and labor-intensive.
[0004] The main reason for the difficulty in later disassembly and damage to the drive shaft after disassembly is that the materials of the wheel hub and the drive shaft are both alloy steels with similar molecular structures. After heavy load and long-term use, the wheel hub and the drive shaft are prone to circumferential movement and mutual penetration of material tissues, causing the coupling and the drive shaft to partially fuse together, making them difficult to disassemble. Even if sufficient pulling force is used to remove them, serious damage will be caused to the outer surface of the drive shaft and the inner hole of the wheel hub.
[0005] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content
[0006] In view of the deficiencies in the prior art, the utility model aims to provide a hydraulic expansion hub that is easy to disassemble and assemble.
[0007] The above technical purpose of the utility model is achieved through the following technical solutions: a hydraulic expansion hub that is easy to disassemble and assemble, comprising a hub inner ring, the inner side of the circumference of the hub inner ring is a mounting hole that matches the clearance of the transmission shaft, the outer side of the circumference of the hub inner ring is sleeved and fixedly connected with the hub outer ring, the outer side of the circumference of the hub inner ring and the inner side of the circumference of the hub outer ring are both provided with annular grooves, and a sealed and annular hydraulic oil cavity is formed, the surface of the hub outer ring is provided with a mounting groove connected to the hydraulic oil cavity, a hydraulic valve is installed in the mounting groove, and the surface of the hub outer ring is provided with an oil filling port connected to the hydraulic valve on one side of the hydraulic valve.
[0008] By adopting the above technical solution, the inner ring of the wheel hub and the transmission shaft adopt a light hole clearance match, and the wheel hub can be quickly put on the transmission shaft directly during the installation process, and the hydraulic oil is injected into the hydraulic oil cavity formed by the outer ring of the wheel hub and the inner ring of the wheel hub through the oil filling port by a high-pressure oil pump. After reaching the required pressure, the hydraulic valve is locked, and the high-pressure oil pump is removed. The hydraulic valve seals the hydraulic oil in the hydraulic oil cavity, and the hydraulic oil with a certain pressure causes the inner ring to deform, and the inner ring and the transmission shaft are tightly held together, thereby realizing the function of transmitting torque. When installing the wheel hub, there is no need to find the keyway size, and the wheel hub can be directly put on the transmission shaft. At the same time, the hydraulic oil injection method is adopted, which saves the axial pressing link, and is convenient for the rapid installation of the wheel hub and the transmission shaft; when the wheel hub needs to be disassembled, the hydraulic valve is removed with a wrench, the hydraulic oil in the hydraulic oil cavity flows out, the pressure of the hydraulic oil cavity is released, the inner hole of the inner ring of the wheel hub is restored to the original size, and a gap is generated between the inner ring of the wheel hub and the transmission shaft, and the wheel hub is pulled out from the transmission shaft, so that the wheel hub and the transmission shaft can be quickly disassembled.
[0009] The utility model is further configured as follows: the inner circumferential surface of the inner ring of the hub is provided with a copper plating layer.
[0010] The utility model is further configured as follows: a peripheral side of the hydraulic valve is provided with threads and is threadedly connected to the mounting groove.
[0011] The utility model is further configured as follows: a rubber sealing ring is arranged in the installation groove between the hydraulic valve and the installation groove.
[0012] The utility model has the following beneficial effects: the inner ring of the wheel hub and the transmission shaft adopt a light hole clearance match, the wheel hub can be quickly directly sleeved on the transmission shaft during the installation process, the hydraulic oil is injected into the hydraulic oil cavity formed by the outer ring of the wheel hub and the inner ring of the wheel hub through the oil filling port by a high-pressure oil pump, after reaching the required pressure, the hydraulic valve is locked, the high-pressure oil pump is removed, the hydraulic valve seals the hydraulic oil in the hydraulic oil cavity, the hydraulic oil with a certain pressure causes the inner ring to deform, the inner ring and the transmission shaft are tightly embraced together, thereby realizing the function of transmitting torque, the wheel hub does not need to find the keyway size when installing, and can be directly sleeved on the transmission shaft, and the hydraulic oil injection method is adopted, which saves the link of axial pressing, and is convenient for the rapid installation of the wheel hub and the transmission shaft; when the wheel hub needs to be disassembled, the hydraulic valve is removed with a wrench, the hydraulic oil in the hydraulic oil cavity flows out, the pressure of the hydraulic oil cavity is released, the inner hole of the inner ring of the wheel hub is restored to the original size, a gap is generated between the inner ring of the wheel hub and the transmission shaft, and the wheel hub is pulled out from the transmission shaft, thereby facilitating the rapid disassembly of the wheel hub and the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic cross-sectional structural diagram of this embodiment;
[0014] Figure 2FIG. 2 is another schematic cross-sectional structure diagram of this embodiment.
[0015] Description of the drawings: 1. Inner ring of wheel hub; 2. Mounting hole; 3. Outer ring of wheel hub; 4. Hydraulic oil chamber; 5. Hydraulic valve; 6. Oil filling port; 7. Copper plating layer; 8. Rubber sealing ring. DETAILED DESCRIPTION
[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0017] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.
[0018] As shown in the figure, a hydraulic expansion hub that is easy to disassemble and assemble includes a hub inner ring 1, the inner side of the circumference of the hub inner ring 1 is a mounting hole 2 that matches the clearance of the transmission shaft, the outer side of the circumference of the hub inner ring 1 is sleeved and fixedly connected with the hub outer ring 3, the outer side of the circumference of the hub inner ring 1 and the inner side of the circumference of the hub outer ring 3 are both provided with annular grooves, and a sealed and annular hydraulic oil chamber 4 is formed, the surface of the hub outer ring 3 is provided with a mounting groove connected to the hydraulic oil chamber 4, a hydraulic valve 5 is installed in the mounting groove, and the surface of the hub outer ring 3 is located on one side of the hydraulic valve 5 and is provided with an oil filling port 6 connected to the hydraulic valve 5.
[0019] The inner ring 1 of the wheel hub and the transmission shaft adopt a light hole clearance fit. During the installation process, the wheel hub can be quickly put on the transmission shaft directly. The hydraulic oil is injected into the hydraulic oil chamber 4 formed by the outer ring 3 of the wheel hub and the inner ring 1 of the wheel hub through the oil filling port 6 by a high-pressure oil pump. After reaching the required pressure, the hydraulic valve 5 is locked and the high-pressure oil pump is removed. The hydraulic valve 5 seals the hydraulic oil in the hydraulic oil chamber 4. The hydraulic oil with a certain pressure causes the inner ring to deform, and the inner ring and the transmission shaft are tightly held together, thereby achieving the function of transmitting torque. The wheel hub does not need to align the keyway size during installation, and can be directly put on the transmission shaft. At the same time, the hydraulic oil injection method is adopted, which saves the axial pressing link, and is convenient for quick installation of the wheel hub and the transmission shaft.
[0020] When the wheel hub needs to be disassembled, the hydraulic valve 5 is removed with a wrench, the hydraulic oil in the hydraulic oil chamber 4 flows out, the pressure in the hydraulic oil chamber 4 is released, the inner hole of the wheel hub inner ring 1 is restored to its original size, a gap is created between the wheel hub inner ring 1 and the drive shaft, and the wheel hub is pulled out from the drive shaft, thereby facilitating the quick disassembly of the wheel hub and the drive shaft.
[0021] The inner circumferential surface of the wheel hub inner ring 1 is provided with a copper plating layer 7. During use, the transmission shaft and the wheel hub inner ring 1 will not be damaged due to the presence of the copper plating layer, even if there is movement in the circumferential direction. This protects the wheel hub itself and the transmission shaft. At the same time, the copper plating layer 7 provides a transition layer between the wheel hub and the transmission shaft. The transition layer material is non-alloy steel, which completely avoids the penetration between the molecules of the two adjacent materials, making it easier to disassemble the wheel hub later.
[0022] The hydraulic valve 5 is provided with threads on its circumference and is threadedly connected to the mounting groove. A rubber sealing ring 8 is provided in the mounting groove between the hydraulic valve 5 and the mounting groove to ensure that the hydraulic oil does not leak and improve the safety and reliability of the wheel hub.
[0023] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.
Claims
1. A hydraulic expansion hub that is easy to disassemble and assemble. Features: The invention comprises a wheel hub inner ring (1), the inner side of the circumference of the wheel hub inner ring (1) is provided with a mounting hole (2) which is loosely matched with a transmission shaft, the outer side of the circumference of the wheel hub inner ring (1) is sleeved with and fixedly connected to a wheel hub outer ring (3), the outer side of the circumference of the wheel hub inner ring (1) and the inner side of the circumference of the wheel hub outer ring (3) are both provided with annular grooves, and a sealed and annular hydraulic oil chamber (4) is formed, the surface of the wheel hub outer ring (3) is provided with a mounting groove which is connected to the hydraulic oil chamber (4), a hydraulic valve (5) is installed in the mounting groove, and the surface of the wheel hub outer ring (3) is provided with an oil filling port (6) which is located on one side of the hydraulic valve (5) and is connected to the hydraulic valve (5).
2. A hydraulic expansion hub that is easy to disassemble and assemble according to claim 1, Features: The inner circumferential surface of the hub inner ring (1) is provided with a copper plating layer (7).
3. A hydraulic expansion hub that is easy to disassemble and assemble according to claim 1, Features: The hydraulic valve (5) is provided with threads on its circumference and is threadedly connected to the mounting groove.
4. A hydraulic expansion hub that is easy to disassemble and assemble according to claim 1, Features: A rubber sealing ring (8) is arranged in the installation groove between the hydraulic valve (5) and the installation groove.