New energy vehicle axle oil seal assembling tool
By combining magnetic conduction expansion fixation and electromagnetic impact-negative pressure adsorption synergistic mechanism with PLC controller and multi-source sensors, the problems of scratches, low precision and low efficiency in traditional axle oil seal assembly are solved, achieving efficient and precise axle oil seal assembly to meet the diverse needs of new energy vehicles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LAIWU DONGYUE YONGSHENG AXLE CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-08-04
AI Technical Summary
Traditional axle oil filling and assembly processes suffer from scratches, low precision, low efficiency, poor equipment compatibility, inability to meet the needs of automated production lines, and lack of real-time collaborative control and fault self-diagnosis functions.
By employing magnetic conduction expansion fixing technology and electromagnetic impact-negative pressure adsorption synergistic mechanism, combined with PLC controller, hydraulic pump station and multi-source sensors, high axle alignment accuracy and improved assembly efficiency are achieved, forming a closed-loop control system.
It achieves axle alignment error of less than 0.1mm, reduces assembly cycle time to 90 seconds per piece, improves efficiency by more than 40%, adapts to diverse vehicle models, and has a self-diagnostic function for faults.
Smart Images
Figure CN224587414U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of axle installation technology, specifically a tooling for axle oil seal of a new energy vehicle. Background Technology
[0002] Traditional axle oil seal assembly processes suffer from multiple technical bottlenecks: axle fixing often relies on mechanical chucks or hydraulic expansion sleeves. The former is prone to surface scratches, while the latter has uncontrollable tightening force and low alignment accuracy, making it difficult to adapt to the universal requirements of axles with different inner diameters; oil seal assembly generally uses manual hammering or simple tooling for pressing, with hammering force depending on experience, which can easily lead to oil seal tilting and lip damage, resulting in assembly cycles of over 150 seconds per piece, failing to meet the efficiency requirements of automated production lines; control systems are mostly stand-alone, lacking real-time coordination between hydraulic systems, electromagnetic drive mechanisms, and sensor data, leading to frequent problems such as pressure fluctuations and displacement deviations, and lacking fault self-diagnosis and predictive maintenance functions; equipment adaptability is poor, supporting only assembly of a single vehicle model, requiring frequent tooling changes when facing the diverse drive systems of new energy vehicles, resulting in low equipment utilization and high production costs. In view of these issues, this case study was developed to address the above problems. Summary of the Invention
[0003] To achieve the above objectives, this utility model provides the following technical solution: a new energy vehicle axle oil seal assembly fixture, comprising a processing table and a processing bracket. The processing bracket is mounted on the processing table, and the processing bracket is provided with an assembly fixture and a support fixture. The assembly fixture includes a telescopic shaft tube, which is inserted into the processing bracket in pairs. A variable-diameter shaft rod and a telescopic hydraulic push rod are provided on the inner side of the telescopic shaft tube. The telescopic hydraulic push rods are installed in pairs on the inner side of the telescopic shaft tube. The variable-diameter shaft rod is inserted into the inner side of the telescopic shaft tube via a linear bearing. The pushing end of the telescopic hydraulic push rod is connected to the variable-diameter shaft rod. The variable-diameter shaft rod has a convex cross-section. An expansion hole is provided on the shaft, the expansion hole being in two pairs and arranged in a cross shape on the variable diameter shaft. A cross-shaped metal rod is provided on the variable diameter shaft. A metal plate is provided on the inner side of the expansion hole. The cross section of the expansion hole is convex. A conductive metal ring plate is provided on the outer side of the variable diameter shaft. A spider web guiding rod and a metal conductive rod are provided on the variable diameter shaft. The spider web guiding rod is connected to the conductive metal ring plate. The metal conductive rod is connected to the spider web guiding rod and the cross-shaped metal rod. An expansion block is provided on the inner side of the expansion hole. An arc-shaped telescopic extrusion block is provided on the expansion block. An expansion magnet is provided on the expansion block. An elastic conductive rod is provided on the inner side of the telescopic shaft tube.
[0004] Preferably, the assembly fixture includes a striking limiting ring, which is arranged in pairs on the outside of the processing bracket. The striking limiting ring is movably fitted onto the outside of the telescopic shaft tube. A striking adjusting hydraulic push rod is provided on the striking limiting ring. The striking adjusting hydraulic push rod is installed in pairs on both sides of the processing bracket. The striking limiting ring is installed on the pushing end of the pair of striking adjusting hydraulic push rods. The processing bracket has four pairs of slide holes. A striking slide is provided on the striking limiting ring. The striking slide is installed in two pairs on the striking limiting ring and is movably inserted into the inside of the slide hole. A striking slider is provided on the inside of the striking slide. A striking ring is provided on each of the two pairs of striking sliders. A negative pressure absorber is provided on the inside of the striking ring. A striking magnet is provided on the striking slider. A striking electromagnet is provided on the inside of the striking slide.
[0005] Preferably, the negative pressure adsorber includes an electric suction cup, and the striking ring has two pairs of negative pressure holes.
[0006] Preferably, an infrared rangefinder is provided on the striking limiting ring.
[0007] Preferably, an arc-shaped friction plate is provided on the outer side of the arc-shaped telescopic extrusion block.
[0008] Preferably, the processing table is equipped with a PLC controller and a hydraulic pump station. Beneficial effects
[0009] This utility model provides a tooling for sealing oil seals on a new energy vehicle axle. It offers the following advantages: This tooling employs magnetic conduction expansion fixing technology, achieving an axle alignment error of ≤0.1mm and an expansion fixing response time of ≤80ms, completely solving the problems of scratches from traditional mechanical chucks and low precision of hydraulic expansion sleeves. The electromagnetic impact-negative pressure adsorption synergistic mechanism ensures oil seal positioning accuracy of ≤0.05mm, shortening the assembly cycle to ≤90s / piece, improving efficiency by more than 40% compared to traditional processes. It collaboratively manages the hydraulic pump station (pressure fluctuation ≤±0.2MPa), high-frequency response solenoid valve group (response frequency ≥200Hz), and multi-source sensors (infrared ranging accuracy ±0.1mm, encoder resolution 10000 lines), forming a closed-loop control system with millisecond-level response. Attached Figure Description
[0010] Figure 1 This is a front sectional view of the tooling for assembling axle oil seals for a new energy vehicle according to the present invention.
[0011] Figure 2 for Figure 1 A magnified view of the letter "A" in the image.
[0012] Figure 3This is a three-dimensional schematic diagram of the axle oil seal assembly tooling for a new energy vehicle as described in this utility model.
[0013] Figure 4 This is a partial three-dimensional schematic diagram of the axle oil seal assembly tooling for a new energy vehicle according to the present invention.
[0014] In the diagram: 1. Machining table; 2. Machining support; 3. Telescopic shaft tube; 4. Variable diameter shaft; 5. Telescopic hydraulic push rod; 6. Expansion hole; 7. Cross-shaped metal rod; 8. Metal sheet; 9. Conductive metal ring; 10. Spider web guide rod; 11. Metal conductive rod; 12. Expansion block; 13. Expansion magnet; 14. Striking limit ring; 15. Striking adjustment hydraulic push rod; 16. Slide hole; 17. Striking slide; 18. Striking slider; 19. Striking ring; 20. Negative pressure adsorber; 21. Striking magnet; 22. Striking electromagnet. Detailed Implementation
[0015] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0016] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further. Example
[0017] Please see Figure 1-4 Traditionally, mechanical clamps or hydraulic expansion sleeves are used to fix axles. However, mechanical clamps are prone to scratching the axle surface, while hydraulic expansion sleeves suffer from uncontrollable tightening force and low centering accuracy, making it difficult to meet the universal requirements of axles with different inner diameters. Oil seals are mostly installed by manual tapping or pressing with simple tooling. The tapping force depends entirely on the worker's experience, which can easily lead to oil seal tilting and lip damage. Moreover, the assembly cycle time is as long as 150 seconds per piece or more, which cannot meet the cycle time requirements of automated production lines. Traditional assembly equipment mostly adopts a single-machine control mode. The hydraulic system, electromagnetic drive mechanism and sensor data cannot be coordinated in real time, resulting in frequent problems such as pressure fluctuations and displacement deviations. Furthermore, it lacks fault self-diagnosis and predictive maintenance functions. Existing tooling only supports the assembly of a single vehicle model. When facing the diversification of new energy vehicle drive systems, tooling needs to be changed frequently, resulting in low equipment utilization and high production costs.
[0018] Therefore, this application protects a new energy vehicle axle oil seal assembly fixture. The axle is mechanically transported to the assembly fixture. A pair of telescopic hydraulic push rods 5 inside a pair of telescopic tubes 3 extend and retract. These push rods 5 drive a variable-diameter shaft 4 on its pushing end, causing the variable-diameter shaft 4 to stably extend and retract along the linear bearing inside the telescopic tube 3. This allows the variable-diameter shaft 4 to be stably and horizontally extended and retracted along the inner side of the telescopic tube 3, thus inserting it into the inner side of the axle. The extended electromagnet on the elastic conduction rod (railway train conductive equipment) is energized, and the magnetism on the extended electromagnet is transmitted to the elastic conduction rod, which in turn transmits the magnetism to the conductive metal ring 9. This achieves the following sequence: extended electromagnet – elastic conduction rod – conductive metal ring 9 – spiderweb drain rod 10 – metal conductive rod 11 – cross-shaped metal rod 7 – metal sheet 8 – extended magnet 13. This causes the extended block 12 to extend and retract along the inner side of the extended hole 6. The arc-shaped telescopic extrusion block on the extended block 12 expands and extrudes the axle, fixing it inwards. This is achieved through processing support... The hydraulic push rod 15 on frame 2 extends and retracts, driving the striking limit ring 14 on it. The striking limit ring 14 then drives two pairs of striking slides 17, causing them to extend and retract along the inner sides of the two pairs of slide holes 16. The striking electromagnets 22 located inside the two pairs of striking slides 17 have their current flow adjusted, resulting in different magnetic poles on the electromagnets 22. This causes the electromagnets 22 to magnetically attract the striking magnet 21, which in turn drives the striking magnet 21 to move. The striking slider 18 causes the striking slider 18 to extend and retract horizontally along the inner side of the striking slide 17. The two pairs of striking sliders 18 drive the striking rings 19 on them, and the striking rings 19 drive the negative pressure adsorbers 20 on them. The oil seal is fixed by negative pressure adsorption through multiple negative pressure adsorbers 20. Then, by reversing the operation, the striking rings 19 on them are driven, and the oil seal on them is driven to extend and retract along the outer side of the telescopic shaft tube 3, thereby magnetically striking the oil seal to the inner side of the axle.
[0019] Furthermore, with a PLC as the core controller, modules such as hydraulic pump station, solenoid valve group, sensor array, and servo driver are integrated. The vehicle controller works in conjunction with the motor controller and battery management system through CAN bus to achieve efficient management of energy flow and signal flow. It uses Siemens S7-1200 series, supports PROFINET communication, integrates 16 digital inputs / outputs and 4 analog inputs, and is equipped with a variable pump + proportional valve. It controls flow and pressure through PWM signal with a response time ≤50ms. It adopts high-frequency response solenoid valves (response frequency ≥200Hz) to control the telescopic shaft tube 3 and the knocking mechanism in two groups. An infrared rangefinder (accuracy ±0.1mm) monitors the axial position of the axle. A pressure sensor (range 0-25MPa) provides real-time feedback on the hydraulic system status. An encoder (resolution 10000 lines) tracks the displacement of the variable diameter shaft 4.
[0020] In summary, the hydraulic push rods inside a pair of telescopic shaft tubes 3 drive the variable diameter shaft 4 to be horizontally inserted into the inner side of the axle. Then, the magnetism is transmitted to the expansion block 12 through a multi-stage magnetic circuit, including the expansion electromagnet, elastic transmission rod, and spider web guide rod 10, which drives the arc telescopic extrusion block to expand and fix the inner side of the axle. At the same time, the hammering adjustment hydraulic push rod 15 on the processing bracket 2 drives the hammering limit ring 14. The hammering electromagnet 22 switches magnetic poles to drive the hammering slider 18 to reciprocate along the slide. Combined with the negative pressure adsorber 20, the oil seal is precisely positioned. Finally, the oil seal is magnetically hammered to the inner side of the axle through the reverse movement.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A new energy vehicle axle oil seal assembling tool, characterized in that, The assembly includes a processing table (1) and a processing support (2). The processing support (2) is mounted on the processing table (1). The processing support (2) is provided with assembly fixtures and support fixtures. The assembly fixtures include telescopic shaft tubes (3). The telescopic shaft tubes (3) are inserted into the processing support (2) in pairs. The inner side of the telescopic shaft tubes (3) is provided with a variable diameter shaft rod (4) and a telescopic hydraulic push rod (5). The telescopic hydraulic push rods (5) are installed in pairs on the inner side of the telescopic shaft tubes (3). The variable diameter shaft rod (4) is inserted into the inner side of the telescopic shaft tubes (3) through a linear bearing. The pushing end of the telescopic hydraulic push rod (5) is connected to the variable diameter shaft rod (4). The variable diameter shaft rod (4) has a convex cross section. The variable diameter shaft rod (4) has an expansion hole (6). The expansion hole (6) is in two pairs and is formed in a cross shape on the variable diameter shaft rod (4). On the variable diameter shaft (4), a cross-shaped metal rod (7) is provided. A metal sheet (8) is provided inside the expansion hole (6). The cross section of the expansion hole (6) is convex. A conductive metal ring plate (9) is provided outside the variable diameter shaft (4). A spider web guide rod (10) and a metal conductive rod (11) are provided on the variable diameter shaft (4). The spider web guide rod (10) is connected to the conductive metal ring plate (9). The metal conductive rod (11) is connected to the spider web guide rod (10) and the cross-shaped metal rod (7). An expansion block (12) is provided inside the expansion hole (6). An arc telescopic extrusion block is provided on the expansion block (12). An expansion magnet (13) is provided on the expansion block (12). An elastic conductive rod is provided inside the telescopic shaft tube (3). An expansion electromagnet is provided on the elastic conductive rod.
2. The new energy vehicle axle oil seal assembly tooling according to claim 1, characterized in that, The assembly fixture includes a striking limiting ring (14), which is arranged in pairs on the outside of the processing bracket (2). The striking limiting ring (14) is movably fitted on the outside of the telescopic shaft tube (3). A striking adjusting hydraulic push rod (15) is provided on the striking limiting ring (14). The striking adjusting hydraulic push rod (15) is installed in pairs on both sides of the processing bracket (2). The striking limiting ring (14) is installed on the pushing end of the pair of striking adjusting hydraulic push rods (15). The processing bracket (2) has four pairs of slide holes (16). The striking limiting ring (14) is provided with striking slides (17), and the striking slides (17) are installed in two pairs on the striking limiting ring (14) and are movably inserted into the inner side of the slide hole (16). The inner side of the striking slide (17) is provided with striking sliders (18), and the two pairs of striking sliders (18) are provided with striking rings (19). The inner side of the striking rings (19) is provided with negative pressure absorbers (20), the striking sliders (18) are provided with striking magnets (21), and the inner side of the striking slides (17) is provided with striking electromagnets (22).
3. The new energy vehicle axle oil seal assembly tooling according to claim 2, characterized in that, The negative pressure adsorber (20) includes an electric suction cup, and the striking ring (19) has two pairs of negative pressure holes.
4. The new energy vehicle axle oil seal assembly tooling according to claim 3, characterized in that, An infrared rangefinder is provided on the striking limit ring (14).
5. The new energy vehicle axle oil seal assembly tooling according to claim 4, characterized in that, The outer side of the arc-shaped telescopic extrusion block is provided with an arc-shaped friction plate.
6. The new energy vehicle axle oil seal assembly tooling according to claim 5, characterized in that, The processing table (1) is equipped with a PLC controller and a hydraulic pump station.