Ventilation structure of double-gear electronic power-assisted steering machine
By adding air guide grooves at the seal chamber connection of the double gear electronic power steering machine and using waterproof and breathable plugs, the air pressure increase and seal failure caused by the sealed cavity are solved, and the stable and efficient operation of the steering machine is achieved.
Patent Information
- Application Number
- CN202420480389.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-13
AI Technical Summary
The existing double-gear electronic power steering machine is prone to form a closed cavity during assembly and use, resulting in an increase in gas pressure and failure of sealing, affecting the normal operation of the steering machine.
A breathable structure is designed. By adding an air conductor groove at the connection of the sealing chamber, the gas communicates in the double gear electronic power steering machine, and balances the internal and external air pressure through a waterproof and breathable plug to ensure sealing and stability.
Effectively export the gas during assembly, balance the internal and external air pressure difference caused by the external environment during use, ensure the internal seal of the steering machine is stable, and avoid seal failure and steering machine failure.
Smart Images
Figure CN222452333U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile steering systems, in particular to a ventilation structure of a double-gear electronic power steering machine. Background Art
[0002] During the production process of steering gears, since the waterproofness and airtightness of the steering gears must meet the requirements of the OEM, many structures use glue or O-rings to ensure sealing with the outside world.
[0003] However, due to design and assembly equipment reasons, various closed cavities are often formed during the assembly process. The gas pressure in the cavity increases and cannot be discharged, which will cause bubbling of the sealant. During use, as the external temperature and altitude change, there is a pressure difference between the internal air pressure and the external air pressure, which leads to failure of the seal, thereby causing failure of the steering gear and loss of steering power for the entire vehicle.
[0004] Therefore, it is necessary to design a ventilation structure for a dual-gear electronic power steering gear to guide the gas in the assembly process and balance the internal and external air pressure difference caused by the external environment during use, thereby ensuring the internal sealing and stable operation of the steering gear. Summary of the invention
[0005] The utility model aims to overcome the deficiencies of the prior art and provides a ventilation structure for a dual-gear electronic power steering machine, which guides out the gas in the assembly process and balances the internal and external air pressure difference caused by the external environment during use, thereby ensuring the internal sealing and stable operation of the steering machine.
[0006] In order to achieve the above-mentioned purpose, the utility model is a ventilation structure of a dual-gear electronic power steering machine, comprising a long housing, a servo subassembly, and a servo motor. The long housing is provided with a sensor end and a servo end. The sensor end is equipped with a sensor assembly, and the servo end is equipped with a servo subassembly. The servo subassembly is connected to the servo motor. The sensor end of the long housing is provided with a sliding bearing mounting surface and a rubber coating surface. The sliding bearing mounting surface is provided with an air guide groove 1, and the two ends of the air guide groove 1 are respectively connected to the sensor cavity and the long housing cavity. The servo subassembly comprises a servo housing and a servo end cover. The bearing mounting surface of the servo housing is provided with an air guide groove 2, and the two ends of the air guide groove 2 are respectively connected to the long housing cavity and the servo housing cavity. The servo end cover is sealed with the servo housing, and the servo end cover is located above the bearing mounting surface. The surface of the servo end cover is provided with a waterproof breathable plug 1. The motor mounting surface of the servo housing is connected to the rotating shaft of the servo motor by a sealed bearing, and the surface of the sealing cover of the servo motor is provided with a waterproof breathable plug 2.
[0007] The cross sections of the first air guide groove and the second air guide groove are L-shaped.
[0008] The rubber-coated surface is sealed with the sensor cover, and a bushing is installed on the sliding bearing installation surface.
[0009] A bearing is installed on the bearing installation surface, and the bearing is axially limited by a retaining spring, and the notch of the retaining spring matches the second air guide groove.
[0010] The waterproof breathable plug 1 and the waterproof breathable plug 2 comprise a waterproof breathable membrane.
[0011] Dust covers are installed at both ends of the long shell.
[0012] Compared with the prior art, the utility model adds an air guide groove at the connection of the sealed cavity, the gas is interconnected in the double-gear electronic power steering machine, and the gas is exchanged with the outside through a waterproof breathable plug to balance the internal and external air pressures. The waterproof breathable plug can block moisture from the outside, thereby ensuring the high efficiency and reliability of the steering machine under complex road conditions and environments of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model.
[0014] Figure 2 It is a structural schematic diagram of the long shell sensor end of the utility model.
[0015] Figure 3 It is a cross-sectional view of the long shell sensor end of the utility model.
[0016] Figure 4 for Figure 3 Enlarged view of point A.
[0017] Figure 5 It is a structural schematic diagram of the servo housing of the utility model.
[0018] Figure 6 It is a cross-sectional view of the long housing servo end of the utility model.
[0019] Figure 7 for Figure 6 Enlarged view of point B.
[0020] Figure 8 The figure is a schematic diagram of the structure of the servo subassembly and the servo motor after being assembled.
[0021] Fig. 9 This is a cross-sectional view of the utility model after the servo subassembly and servo motor are assembled Figure 1 .
[0022] Fig.10 This is a cross-sectional view of the utility model after the servo subassembly and servo motor are assembled Figure 2 . DETAILED DESCRIPTION
[0023] The utility model is now further described with reference to the accompanying drawings.
[0024] See also Figure 1The utility model is a ventilation structure of a dual-gear electronic power steering machine, including a long housing, a servo subassembly, and a servo motor. The long housing 1 is provided with a sensor end 11 and a servo end. The sensor end 11 is provided with a sensor assembly 4. The servo end is provided with a servo subassembly 2. The servo subassembly 2 is connected to the servo motor 3. Dust covers 5 are provided at both ends of the long housing 1. Figure 2 The sensor end 11 of the long shell 1 is provided with a sliding bearing mounting surface 12 and a rubber coating surface 13, and the sliding bearing mounting surface 12 is provided with an air guide groove 14. The two ends of the air guide groove 14 are respectively connected to the sensor cavity and the long shell cavity. The air guide groove 14 conducts the gas in the sensor cavity to the long shell cavity.
[0025] See also Figure 5 , Figure 8 and Fig. 9 The servo subassembly 2 includes a servo housing 21 and a servo end cover 22. The bearing mounting surface 23 of the servo housing 21 is provided with a second air guide groove 24. The two ends of the second air guide groove 24 are respectively connected to the long housing cavity and the servo housing cavity. The servo end cover 22 is sealed with the servo housing 21, and the servo end cover 22 is located above the bearing mounting surface 23. The surface of the servo end cover 22 is provided with a waterproof breathable plug 1 25. The second air guide groove 24 conducts the gas in the long housing cavity to the servo housing cavity, and then guides the gas in the servo housing cavity through the waterproof breathable plug 1 25.
[0026] See also Figure 3 , Figure 4 The rubber coating surface 13 is sealed with the sensor cover 41, a bushing 15 is installed on the sliding bearing mounting surface 12, the sensor cavity forms a closed space, and the setting of the air guide groove 14 enables the gas in the closed space to be discharged to the long shell cavity.
[0027] See also Figure 6 , Figure 7 A bearing 26 is installed on the bearing mounting surface 23. The bearing has a sealing structure. The bearing 26 is axially limited by a retaining spring. The notch of the retaining spring matches the air guide groove 24 to achieve maximum air permeability, so that the gas in the long shell cavity can be discharged to the servo shell cavity.
[0028] See also Figure 8 , Fig.10 The motor mounting surface 27 of the servo housing 21 is connected to the rotating shaft of the servo motor 3 by a sealed bearing 31, and a waterproof breathable plug 2 33 is provided on the surface of the sealing cover 32 of the servo motor 3. Due to the presence of the sealed bearing 31, the gas in the servo motor 3 cannot enter the servo assembly and be discharged through the waterproof breathable plug 1 25 of the servo end cover 22, and the gas in the servo motor 3 can only be discharged through the waterproof breathable plug 2 33.
[0029] In order to facilitate the gas flow, the cross-sections of the first gas guide groove 14 and the second gas guide groove 24 are L-shaped.
[0030] The waterproof breathable plug 1 25 and the waterproof breathable plug 2 33 include a waterproof breathable membrane, which has the function of exchanging gas and preventing external water from entering the steering gear assembly.
[0031] In the sensor cover assembly process of the utility model: after the long shell 1 is pressed into the bushing 15, the sensor assembly 4 is installed. At this time, the sensor cover 41 needs to be pressed. The sensor cover 41 and the glue-coated surface 13 of the long shell 1 are sealed by glue coating. When the sensor cover 41 is pressed, the compressed air pressure on the upper part of the long shell 1 increases instantaneously, and the air guide groove 14 guides the compressed gas generated in the sensor cover pressing process. The sealant does not bubble and there is no risk of sealing failure.
[0032] During the dust cover assembly process of the utility model: after the sensor cover 41 is installed, the servo subassembly 2 is installed into the long housing 1, and an O-ring seal is arranged between the servo subassembly 2 and the long housing 1. At this time, the steering gear assembly is assembled with the dust cover 5, and the two dust covers 5 are simultaneously installed into the long housing 1 from both sides. The compressed air pressure in the long housing 1 increases instantaneously, and the air guide groove 24 guides the compressed gas generated during the pressing process of the dust cover to the servo housing cavity, and guides the gas to the outside through the waterproof breathable plug 25 to balance the internal air pressure. The sealant does not bubble and there is no risk of sealing failure.
[0033] When the double-gear electronic power steering gear of the utility model is installed, the air guide groove 14, the air guide groove 24, the waterproof vent plug 1 25, and the waterproof vent plug 2 33 ensure that the steering gear assembly and the external air pressure are balanced in the environment of -40~125℃, and the steering gear assembly is sealed. At the same time, the waterproof vent plug can ensure that external water cannot enter the interior of the steering gear, and ensure that the steering gear is sealed and works reliably.
[0034] The utility model adds an air guide groove at the connection of the sealed cavity, and the gas is interconnected in the double-gear electronic power steering machine, and the gas is exchanged with the outside through a waterproof breathable plug to balance the internal and external air pressures. The waterproof breathable plug can block moisture from the outside, thereby ensuring the high efficiency and reliability of the steering machine under complex road conditions and environments of the whole vehicle.
Claims
1. A ventilation structure of a dual-gear electronic power steering machine, comprising a long housing, a servo subassembly, and a servo motor, wherein the long housing (1) is provided with a sensor end (11) and a servo end, the sensor end (11) is provided with a sensor assembly (4), the servo subassembly (2) is provided with the servo end, and the servo subassembly (2) is connected to the servo motor (3), characterized in that: The sensor end (11) of the long housing (1) is provided with a sliding bearing mounting surface (12) and a rubber coating surface (13); the sliding bearing mounting surface (12) is provided with an air guide groove (14); the two ends of the air guide groove (14) are respectively connected to the sensor cavity and the long housing cavity; the servo subassembly (2) comprises a servo housing (21) and a servo end cover (22); the bearing mounting surface (23) of the servo housing (21) is provided with an air guide groove (24); the two ends of the air guide groove (24) are respectively connected to the long housing cavity and the servo housing cavity; the servo end cover (22) is sealed with the servo housing (21), and the servo end cover (22) is located above the bearing mounting surface (23); a waterproof breathable plug (25) is provided on the surface of the servo end cover (22); a motor mounting surface (27) of the servo housing (21) is connected to the rotating shaft of the servo motor (3) by a sealed bearing (31); and a waterproof breathable plug (33) is provided on the surface of the sealing cover (32) of the servo motor (3).
2. The ventilation structure of a dual-gear electronic power steering machine according to claim 1, characterized in that: The cross-sections of the air guide groove 1 (14) and the air guide groove 2 (24) are L-shaped.
3. The ventilation structure of a dual-gear electronic power steering machine according to claim 1, characterized in that: The rubber-coated surface (13) is sealed with the sensor cover (41), and a bushing (15) is installed on the sliding bearing mounting surface (12).
4. The ventilation structure of a dual-gear electronic power steering machine according to claim 1, characterized in that: A bearing (26) is mounted on the bearing mounting surface (23), and the bearing (26) is axially limited by a retaining spring, wherein a notch of the retaining spring matches the second air guide groove (24).
5. The ventilation structure of a dual-gear electronic power steering machine according to claim 1, characterized in that: The waterproof breathable plug 1 (25) and the waterproof breathable plug 2 (33) comprise a waterproof breathable membrane.
6. The ventilation structure of a dual-gear electronic power steering machine according to claim 1, characterized in that: Dust covers (5) are installed at both ends of the long shell (1).