EPS steer-by-wire motor shaft

Abstract

The utility model provides an EPS steer-by-wire motor shaft. The EPS steer-by-wire motor shaft comprises a mounting shell, a shaft sleeve and a shaft sleeve, the driving component is mounted in the mounting shell, a connecting assembly is mounted at the output end of the driving component through a clamping block, a connecting shaft is mounted at the other end of the connecting assembly through a clamping groove, a stabilizing shaft is fixedly connected to the other end of the connecting shaft, and an output shaft is fixedly connected to the other end of the stabilizing shaft; a transmission gear is installed at the other end of the output shaft through a fixing buckle, an oil outlet is formed in the outer surface of the transmission gear, and through weight reduction openings are formed in one end of the connecting shaft, one end of the stabilizing shaft and one end of the output shaft. According to the EPS steer-by-wire motor shaft provided by the utility model, the steering motor shaft which is light in weight is adopted through the design, so that the rotating stability of the steering motor shaft is improved, meanwhile, the lubricating effect is kept at the joint of the transmission gear and the gear box in a manner of continuously injecting lubricating oil, and the EPS steer-by-wire motor shaft is beneficial to reducing abrasion and prolonging the service life of the joint.

Description

Technical Field

[0001] This utility model relates to the field of EPS steer-by-wire motor shaft technology, and in particular to EPS steer-by-wire motor shaft. Background Technology

[0002] Electric power steering (EPS) is a power steering system that directly relies on an electric motor to provide auxiliary torque. Compared with the traditional hydraulic power steering (HPS) system, EPS has many advantages. EPS mainly consists of a torque sensor, a vehicle speed sensor, an electric motor, a reduction mechanism, and an electronic control unit.

[0003] The main function of the EPS steer-by-wire motor shaft is to provide assistance, helping the driver to turn the steering wheel more easily, while ensuring that the vehicle can accurately respond to the driver's commands in autonomous or semi-autonomous driving modes.

[0004] Because the gear at one end of the EPS steer-by-wire motor shaft is connected to the gearbox, and the traditional EPS steer-by-wire motor shaft is hollow, heavy, and lacks an automatic lubrication structure, it is prone to accelerated wear due to reduced lubrication over time, thus affecting the stability of the motor shaft operation.

[0005] Therefore, it is necessary to provide an EPS steer-by-wire motor shaft to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides an EPS steerable motor shaft, which solves the problem that the lack of an automatic lubrication structure at the connection point between the solid EPS steerable motor shaft and the gearbox will lead to accelerated wear due to reduced lubrication over time, affecting the operational stability of the steering motor shaft.

[0007] To solve the above-mentioned technical problems, the EPS drive-by-wire steering motor shaft provided by this utility model includes: a mounting housing;

[0008] A drive component is installed inside the mounting housing. The output end of the drive component is fitted with a connecting assembly via a locking block. The other end of the connecting assembly is fitted with a connecting shaft via a slot. The other end of the connecting shaft is fixedly connected to a stabilizing shaft. The other end of the stabilizing shaft is fixedly connected to an output shaft. The other end of the output shaft is fitted with a transmission gear via a fixing buckle. An oil outlet is provided on the outer surface of the transmission gear. One end of the connecting shaft, stabilizing shaft, and output shaft is provided with a through-hole for weight reduction.

[0009] The mounting port is located on the outer surface of the stabilizer shaft. A rotating assembly is installed inside the mounting port. The rotating assembly includes a fixed ring and a rotating ring. The rotating ring is rotatably mounted on the outer surface of the fixed ring. An oil injection pipe is fixedly connected to the inner surface of the fixed ring. A connecting pipe is fixedly connected to the outer surface of the rotating ring. A mounting rod with a mounting plate is fixedly connected to each opposite side of the outer surface of the rotating ring.

[0010] The transmission gear is connected to the other end of the output shaft via a bolt and a fixed disc, and then reinforced by welding. The locking block and slot are used to increase the stability of the connection between the connecting shaft and the output end of the drive component. The inner surface of the rotating ring has a groove, and the outer surface of the fixed ring is provided with a structure that mechanically seals the rotating ring to increase the sealing performance. The outer surfaces of the fixed ring and the rotating ring are rotatably connected. The other end of the oil injection pipe is connected to the oil outlet of the transmission gear. The oil injection pipe can deliver the lubricant between the rotating ring and the fixed ring to the oil outlet. The connecting pipe can be directly connected to the pump body outlet for injecting lubricating oil. If necessary, a filter structure can be installed at the other end of the connecting pipe.

[0011] Preferably, the inner surface of the weight reduction port is provided with multiple mounting grooves, and multiple reinforcing brackets are installed inside the weight reduction port by means of fixing rods.

[0012] Preferably, the connecting assembly includes a mating plate, two retaining rings, a mating groove, and a fixing bolt. The two ends of the mating plate are used to install the two retaining rings, and the mating groove is formed on the inner surface of the retaining rings.

[0013] The fixing bolts are inserted into the retaining ring after connecting the shaft and the output end of the drive component, and the mating groove facilitates the insertion of the retaining block.

[0014] Preferably, a heat dissipation component is mounted on the front side of the mounting housing, and a protective plate is mounted on the front side of the heat dissipation component;

[0015] The protective plate has openings, and the heat dissipation components include a housing and a cooling fan.

[0016] Preferably, a filter tube is fixedly connected to the top end of the connecting pipe, and a filter disc is installed inside the filter tube;

[0017] The filter disc is removable and can filter lubricating oil.

[0018] Preferably, a sealing cap is installed at the other end of the filter tube, and a connecting tube is installed at the top of the sealing cap;

[0019] After connecting the manifold and the filter tube.

[0020] Compared with related technologies, the EPS steer-by-wire motor shaft provided by this utility model has the following advantages:

[0021] This utility model provides an EPS (Electric Power Steering) steerable motor shaft. To increase the stability and timely lubrication of the EPS steerable motor shaft, a through-hole for weight reduction is opened in the middle of the shaft, which consists of a connecting shaft, a stabilizing shaft, and an output shaft. This reduces the weight of the steerable motor shaft and increases stability. Simultaneously, an installation port is opened on the outside of the stabilizing shaft. A rotating assembly, consisting of a fixed ring and a rotating ring, capable of continuously supplying oil during rotation, is then installed inside the installation port. One end of the oil injection pipe is connected to the bottom opening of the inner wall of the fixed ring, and the other end is connected to the oil outlet on the outer surface of the transmission gear. This allows lubricating oil to be intermittently injected into the connection between the transmission gear and the gearbox during the rotation of the steerable motor shaft via the rotating assembly. This design utilizes a lightweight steerable motor shaft, improving its rotational stability. Furthermore, the continuous lubrication of the transmission gear and gearbox connection reduces wear and extends the service life of the connection. Attached Figure Description

[0022] Figure 1 A schematic diagram of a preferred embodiment of the EPS (Electric Power Steering) motor shaft provided by this utility model;

[0023] Figure 2 A schematic diagram of the drive component is provided for this utility model;

[0024] Figure 3 A schematic diagram of the rotating assembly is provided for this utility model;

[0025] Figure 4 Provided for this utility model Figure 3 An enlarged view of point A shown;

[0026] Figure 5 Provided for this utility model Figure 3 A magnified view of point B shown.

[0027] The diagram is labeled as follows: 1. Mounting housing, 2. Connecting shaft, 3. Rotating assembly, 301. Fixing ring, 302. Rotating ring, 4. Output shaft, 5. Fixing buckle, 6. Oil outlet, 7. Transmission gear, 8. Stabilizing shaft, 9. Mounting plate, 10. Mounting rod, 11. Connecting assembly, 111. Connecting plate, 112. Snap ring, 113. Connecting groove, 114. Fixing bolt, 12. Drive component, 13. Heat dissipation component, 14. Protective plate, 15. Weight reduction port, 16. Fixing rod, 17. Reinforcing frame, 18. Mounting port, 19. Oil injection pipe, 20. Mounting groove, 21. Clamping block, 22. Clamping groove, 23. Filter pipe, 24. Filtering disc, 25. Connecting pipe, 26. Sealing cover, 27. Connecting pipe. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of a preferred embodiment of the EPS (Electric Power Steering) motor shaft provided by this utility model; Figure 2 A schematic diagram of the drive component is provided for this utility model; Figure 3 A structural schematic diagram of the rotating component is provided for this utility model;

[0030] Figure 4 Provided for this utility model Figure 3 An enlarged view of point A shown; Figure 5 Provided for this utility model Figure 3 The enlarged view at point B is shown. The EPS drive-by-wire steering motor shaft includes: mounting housing 1;

[0031] A drive component 12 is installed inside the mounting housing 1. The output end of the drive component 12 is fitted with a connecting component 11 via a locking block 21. The other end of the connecting component 11 is fitted with a connecting shaft 2 via a locking groove 22. The other end of the connecting shaft 2 is fixedly connected to a stabilizing shaft 8. The other end of the stabilizing shaft 8 is fixedly connected to an output shaft 4. The other end of the output shaft 4 is fitted with a transmission gear 7 via a fixing buckle 5. An oil outlet 6 is provided on the outer surface of the transmission gear 7. A through weight reduction port 15 is provided at one end of the connecting shaft 2, the stabilizing shaft 8, and the output shaft 4.

[0032] Mounting port 18 is located on the outer surface of the stabilizing shaft 8. A rotating assembly 3 is installed inside the mounting port 18. The rotating assembly 3 includes a fixed ring 301 and a rotating ring 302. The rotating ring 302 is rotatably mounted on the outer surface of the fixed ring 301. An oil injection pipe 19 is fixedly connected to the inner surface of the fixed ring 301. A connecting pipe 27 is fixedly connected to the outer surface of the rotating ring 302. A mounting rod 10 with a mounting plate 9 is fixedly connected to each opposite side of the outer surface of the rotating ring 302.

[0033] The transmission gear 7 is connected to the other end of the output shaft 4 via a bolt and a fixed plate, and then reinforced by welding. The locking block 21 and the locking groove 22 cooperate to increase the stability of the connection between the connecting shaft 2 and the output end of the drive component 12. The inner surface of the rotating ring 302 is provided with a groove, and the outer surface of the fixed ring 301 is provided with a structure that mechanically seals with the rotating ring 302 to increase the sealing performance. The outer surfaces of the fixed ring 301 and the rotating ring 302 are rotatably connected. The other end of the oil injection pipe 19 is connected to the oil outlet 6 opened in the transmission gear 7. The oil injection pipe 19 can deliver the lubricant between the rotating ring 302 and the fixed ring 301 to the oil outlet 6. The connecting pipe 27 can be directly connected to the pump body outlet for injecting lubricating oil. If necessary, a filter structure can be installed at the other end of the connecting pipe 27. The mounting plate 9 cooperates with the mounting rod 10 to fix the rotating ring 302 in the corresponding position so that the rotating ring 302 does not rotate with the fixed ring 301. The oil injection pipe 19 passes through the inside of the weight reduction port 15.

[0034] The inner surface of the weight reduction port 15 is provided with multiple mounting grooves 20, and multiple reinforcing brackets 17 are installed inside the weight reduction port 15 by means of fixing rods 16.

[0035] The reinforcing bracket 17 is inserted into the mounting slot 20.

[0036] The connecting assembly 11 includes a mating plate 111, two retaining rings 112, a mating groove 113, and a fixing bolt 114. The two ends of the mating plate 111 are used to install the two retaining rings 112, and the mating groove 113 is formed on the inner surface of the retaining rings 112.

[0037] After the fixing bolt 114 is inserted into the retaining ring 112 at the output end of the connecting shaft 2 and the drive component 12, it is fixed in place. The mating groove 113 facilitates the insertion of the retaining block 21.

[0038] A heat dissipation component 13 is mounted on the front of the mounting housing 1, and a protective plate 14 is mounted on the front of the heat dissipation component 13.

[0039] The protective plate 14 has holes, the heat dissipation component 13 includes a housing and a cooling fan, and a filter screen is installed on the back of the mounting shell 1.

[0040] A filter tube 23 is fixedly connected to the top end of the connecting tube 27, and a filter disc 24 is installed inside the filter tube 23.

[0041] The filter disc 24 is removable and can filter the lubricating oil to prevent impurities from entering the oil injection pipe 19.

[0042] A sealing cap 26 is installed at the other end of the filter tube 23, and a connecting tube 25 is installed at the top of the sealing cap 26;

[0043] After the connecting pipe 27 and the filter pipe 23 are connected, the connecting pipe 25 on the sealing cover 26 can be connected to the outlet of the lubricating oil pump body.

[0044] The working principle of the EPS drive-by-wire steering motor shaft provided by this utility model is as follows:

[0045] A through-hole 15 is opened in the middle of the steering motor shaft, which consists of connecting shaft 2, stabilizing shaft 8, and output shaft 4, to reduce the weight of the steering motor shaft and increase stability. Simultaneously, an installation port 18 is opened on the outside of the stabilizing shaft 8. A rotating assembly 3, consisting of a fixed ring 301 and a rotating ring 302, capable of continuously supplying oil during rotation, is then installed inside the installation port 18. One end of the oil injection pipe 19 is connected to the bottom opening of the inner wall of the fixed ring 301, and the other end of the oil injection pipe 19 is connected to the oil outlet 6 on the outer surface of the transmission gear 7. This allows lubricating oil to be intermittently injected into the connection between the transmission gear 7 and the gearbox during the rotation of the steering motor shaft via the rotating assembly 3. In actual use, the steering motor shaft and the output end of the drive component 12 are connected... After connecting the components 11, connect the transmission gear 7 and the gearbox. Once completed, connect the connecting pipe 27 and the output end of the pump body for lubrication. During the rotation of the steering motor shaft driven by the drive component 12, the rotating ring 302 is fixed by the mounting plate 9 and the mounting rod 10 and will not rotate with the fixed ring 301. The lubricating oil will be injected into the groove on the inner surface of the rotating ring 302, allowing the lubricating oil to be injected from one end of the oil injection pipe 19 in the fixed ring 301 to the outer surface of the transmission gear 7. Since the connection between the rotating ring 302 and the fixed ring 301 is treated with a mechanical seal that will not affect the rotation, the lubricating oil will not leak and will only be delivered from the oil injection pipe 19. This allows the lubricating oil to be continuously injected in small amounts into the connection between the transmission gear 7 and the gearbox to increase the lubrication effect.

[0046] Compared with related technologies, the EPS steer-by-wire motor shaft provided by this utility model has the following advantages:

[0047] To increase the stability and timely lubrication of the EPS steer-by-wire motor shaft, a through-hole 15 is opened in the middle of the steering motor shaft, which consists of a connecting shaft 2, a stabilizing shaft 8, and an output shaft 4. This reduces the weight of the steering motor shaft and increases its stability. Simultaneously, an installation port 18 is opened on the outside of the stabilizing shaft 8. A rotating assembly 3, consisting of a fixed ring 301 and a rotating ring 302, capable of continuously supplying oil during rotation, is then installed inside the installation port 18. One end of the oil injection pipe 19 is connected to the bottom opening of the inner wall of the fixed ring 301, and the other end is connected to the oil outlet 6 on the outer surface of the transmission gear 7. This allows lubricating oil to be intermittently injected into the connection between the transmission gear 7 and the gearbox during the rotation of the steering motor shaft via the rotating assembly 3. This design utilizes a lightweight steering motor shaft, improving its rotational stability. Furthermore, the continuous lubrication of the transmission gear 7 and gearbox connection reduces wear and extends the service life of the connection.

[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An EPS (Electric Power Steering) motor shaft, characterized in that, include: Mounting housing; A drive component is installed inside the mounting housing. The output end of the drive component is fitted with a connecting assembly via a locking block. The other end of the connecting assembly is fitted with a connecting shaft via a slot. The other end of the connecting shaft is fixedly connected to a stabilizing shaft. The other end of the stabilizing shaft is fixedly connected to an output shaft. The other end of the output shaft is fitted with a transmission gear via a fixing buckle. An oil outlet is provided on the outer surface of the transmission gear. One end of the connecting shaft, stabilizing shaft, and output shaft is provided with a through-hole for weight reduction. The mounting port is located on the outer surface of the stabilizing shaft. A rotating assembly is installed inside the mounting port. The rotating assembly includes a fixed ring and a rotating ring. The rotating ring is rotatably mounted on the outer surface of the fixed ring. An oil injection pipe is fixedly connected to the inner surface of the fixed ring. A connecting pipe is fixedly connected to the outer surface of the rotating ring. A mounting rod with a mounting plate is fixedly connected to each opposite side of the outer surface of the rotating ring.

2. The EPS drive-by-wire steering motor shaft according to claim 1, characterized in that, The inner surface of the weight reduction port is provided with multiple mounting grooves, and multiple reinforcing brackets are installed inside the weight reduction port by means of fixing rods.

3. The EPS drive-by-wire steering motor shaft according to claim 1, characterized in that, The connecting assembly includes a mating plate, two retaining rings, a mating groove, and a fixing bolt. The two ends of the mating plate are used to install the two retaining rings, and the mating groove is formed on the inner surface of the retaining rings.

4. The EPS drive-by-wire steering motor shaft according to claim 1, characterized in that, A heat dissipation component is mounted on the front of the mounting housing, and a protective plate is mounted on the front of the heat dissipation component.

5. The EPS drive-by-wire steering motor shaft according to claim 1, characterized in that, A filter tube is fixedly connected to the top end of the connecting pipe, and a filter disc is installed inside the filter tube.

6. The EPS steer-by-wire motor shaft according to claim 5, characterized in that, A sealing cap is installed at the other end of the filter tube, and a connecting tube is installed at the top of the sealing cap.

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