CN217415876U - Double-pinion electric power steering mechanism - Google Patents
Double-pinion electric power steering mechanism Download PDFInfo
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- CN217415876U CN217415876U CN202123412093.3U CN202123412093U CN217415876U CN 217415876 U CN217415876 U CN 217415876U CN 202123412093 U CN202123412093 U CN 202123412093U CN 217415876 U CN217415876 U CN 217415876U
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Abstract
The utility model belongs to the technical field of car power assisted steering system technique and specifically relates to an electronic power assisted steering mechanism of two pinions, including two sets of rack and pinion transmission pairs, first set one side that the rack and pinion transmission is vice is provided with the vice lower bearing of rack and pinion transmission, the top of the vice lower bearing of rack and pinion transmission is provided with input side shell, the vice upper bearing of rack and pinion transmission and torque signal unit assembly, first set the vice opposite side of rack and pinion transmission is provided with the main casing body, and the second is organized one side that the rack and pinion transmission is vice is provided with helping hand side gear cydariform tooth, and beneficial effect lies in: the lower end bearing is fixed on the shell through an internal pressure type structure, the types of parts and assembly procedures are reduced, the axial positioning mode of the power-assisted side gear bearing is consistent with that of the input side, the types of parts and the assembly procedures of the steering gear are reduced while the product functions are met, the cost is reduced, the installation efficiency is improved, and the product application market is expanded.
Description
Technical Field
The utility model relates to an automobile power assisted steering system technical field especially relates to a two pinion electric power assisted steering mechanism.
Background
In the EPS steering system of an automobile, in the face of the increasing development demand of new energy vehicle types in China, the requirements of various host factories on the output power and the NVH performance of an electric power-assisted steering system are increased, and the conventional C-EPS and SP-EPS can not be matched with the steering demand of small or medium-sized vehicles, compared with the conventional C-EPS and SP-EPS, DP-EPS servo units are arranged on a second pinion, the power-assisted side gear transmission is separated from the steering side gear transmission, the rigidity demand on the steering side transmission shaft is lower, the system power can be further improved, the electric power-assisted steering system has the characteristics of higher system rigidity and output power interval, meanwhile, the DP-EPS servo units can rotate around a worm and worm gear axis, a power-assisted gear axis and a rack axis, the arrangement and installation modes are flexible, and good vehicle collision safety and NVH performance can be brought, so that a double-pinion electric power-assisted steering mechanism is designed at present, the output power of the steering system can be effectively improved, and the NVH performance can be improved.
The double-pinion electric power steering mechanism generally adopts an input side integral shell structure, a pinion and rack transmission pair mechanism adopts upper and lower bearing axial positioning, a lower end bearing is fixed in a shell in an external compression mode, the pinion and rack transmission pair and the lower end bearing are fixed in a nut locking and press-fitting mode, a sealing cover is added to be sealed and sealed, the process is complex, and the installation is complex, so that the double-pinion electric power steering mechanism is simple in structure, high in assembly work efficiency and long in service life.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a double-pinion electric power steering mechanism.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a double-pinion electric power steering mechanism is designed, and comprises two groups of gear-rack transmission pairs, wherein a gear-rack transmission pair lower bearing is arranged on one side of the first group of gear-rack transmission pairs, an input side shell, a gear-rack transmission pair upper bearing and a torque signal unit assembly are arranged on the top of the gear-rack transmission pair lower bearing, a steering main shell is arranged on the other side of the first group of gear-rack transmission pairs, power-assisted side gear crowned teeth are arranged on one side of the second group of gear-rack transmission pairs, a power-assisted side gear lower bearing and a worm gear reduction mechanism are arranged on the top of the power-assisted side gear, a power-assisted servo motor and a controller unit are arranged on one side of the worm gear reduction mechanism, and a steering tie rod and rack power-assisted side crowned teeth are arranged on the other side of the second group of gear-rack transmission pairs.
Preferably, the gear rack transmission pair, the torque signal unit assembly, the input side shell and the input side bearing on the input side gear are assembled to form the input side transmission unit.
Preferably, the power-assisted side gear lower bearing and the worm and gear speed reducing mechanism are assembled to form a power-assisted side transmission unit.
Preferably, the input side transmission unit, the power-assisted servo motor and controller unit, the main steering housing, the tie rod and the rack are assembled.
The utility model provides a pair of pinion electric power steering mechanism, beneficial effect lies in:
1. the utility model provides a split type fixed knot of rack and pinion transmission is constructed, lower extreme bearing adopts the interior pressure formula structure to be fixed in the casing, reduces part kind, assembly process, and helping hand side gear bearing axial positioning mode keeps unanimous with the input side, when satisfying the product function, reduces steering gear part kind, assembly process, and the cost is reduced has improved the installation effectiveness, has expanded product application market.
2. In order to improve the durability of products, the tooth shapes of the gears and the racks are optimized, the strength of the gears and the racks in a main use area is mainly guaranteed, and the service life of the double-pinion electric power steering mechanism is prolonged.
3. The steering system achieves large output power range and NVH performance improvement, the assembling process is easy to meet the requirements of achieving equipment automation, the types of steering gear parts and assembling procedures are reduced, assembling beats are improved, labor efficiency is improved, the part generalization degree is improved, cost is reduced, product durability is strong, and after-sale noise complains less.
Drawings
Fig. 1 is a schematic view of the overall structure provided by the present invention.
In the figure: 1. a gear rack transmission pair; 2. a lower bearing of the gear rack transmission pair; 3. a steering main housing; 4. an input side housing; 5. a gear rack transmission pair upper bearing; 6. a power-assisted side gear; 7. a power-assisted side gear lower bearing; 8. a servo-assisted motor and controller unit; 9. a worm gear reduction mechanism; 10. a torque signal unit; 11. tie rods and racks.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention, and furthermore, the terms "first", "second", and "third" are only used for descriptive purposes and are not intended to indicate or imply relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention according to its overall structure.
Referring to fig. 1, the double pinion electric power steering mechanism comprises two sets of gear rack transmission pairs 1, one side of the first set of gear rack transmission pair 1 is provided with a gear rack transmission pair lower bearing 2, an input side shell 4, a rack and pinion transmission pair upper bearing 5 and a torque signal unit assembly 10 are arranged at the top of the rack and pinion transmission pair lower bearing 2, a steering main shell 3 is arranged at the other side of the first group of rack and pinion transmission pair 1, a power-assisted side gear 6 crowned teeth is arranged at one side of the second group of rack and pinion transmission pair 1, the top of the power-assisted side gear 6 is provided with a power-assisted side gear lower bearing 7 and a worm and gear speed reducing mechanism 9, and a power-assisted servo motor and controller unit 8 is arranged on one side of the worm gear and worm speed reducing mechanism 9, and a steering tie rod and rack 11 power-assisted side crowned teeth are arranged on the other side of the second group of the rack-and-pinion transmission pair 1.
Preferably, the gear rack transmission pair 1, the torque signal unit assembly 10, the input side shell 4 and the input side upper gear bearing 5 are assembled to form an input side transmission unit.
Preferably, the booster side gear 6, the booster side gear lower bearing 7 and the worm gear reduction mechanism 9 are assembled to form a booster side transmission unit.
Preferably, the input side transmission unit, the power-assisted servo motor and controller unit 8, the main steering housing 3, the tie rod and the rack 11 are assembled.
The working principle is as follows: the gear rack transmission pair lower bearing 2 is pressed into a steering main shell 3, the power-assisted side gear lower bearing 2 is pressed into the steering main shell 3, the gear rack transmission pair 1, a torque signal unit assembly 10, an input side shell 4 and an input side gear upper bearing 5 are assembled to form an input side transmission unit, the power-assisted side gear 6, the power-assisted side gear lower bearing 7 and a worm gear speed reducing mechanism 9 are assembled to form a power-assisted side transmission unit, the input side transmission unit, the power-assisted servo motor and controller unit 8, the steering main shell 3, a steering cross pull rod and a rack 11 are assembled, the power-assisted servo motor and controller unit 8 are flexibly arranged in space, the input side adopts a split structure, the process is simple and easy to assemble, the system output power and the good tooth shape NVH performance are high, when a rack of the power-assisted side gear 6 is processed, a drum-shaped scheme is adopted to carry out drum-shaped tooth design on the tooth shape of the power-assisted side gear, namely, the gear tooth thickness of the central area is increased, then gradually decreased towards two sides, the tooth thickness of the middle tooth form of the power-assisted side rack 6 is increased compared with that of two sides, and the tooth form thickness of the gear rack at the middle position is increased. Therefore, after the product is used for a period of time, although the middle position is more worn than two sides, the initial quantity in the middle is more than two, and the consistency of the product gap is ensured.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a two pinion electric power steering mechanism, includes two sets of rack and pinion transmission pairs (1), its characterized in that: one side of the first group of gear rack transmission pairs (1) is provided with a gear rack transmission pair lower bearing (2), an input side shell (4), a rack and pinion transmission pair upper bearing (5) and a torque signal unit assembly (10) are arranged at the top of the rack and pinion transmission pair lower bearing (2), a steering main shell (3) is arranged on the other side of the first group of rack and pinion transmission pair (1), a power-assisted side gear (6) is arranged on one side of the second group of rack and pinion transmission pair (1), the top of the power-assisted side gear (6) is provided with a power-assisted side gear lower bearing (7) and a worm and gear speed reducing mechanism (9), and a power-assisted servo motor and controller unit (8) is arranged on one side of the worm gear and worm speed reducing mechanism (9), and a tie rod and a rack (11) are arranged on the other side of the second group of the gear-rack transmission pair (1).
2. A double-pinion electric power steering mechanism according to claim 1, characterised in that the rack and pinion gear pair (1), the torque signal unit assembly (10), the input side housing (4) and the input side pinion upper bearing (5) are assembled to form an input side transmission unit.
3. A double-pinion electric power steering mechanism according to claim 1, characterised in that the power-assisted side gear (6), the power-assisted side gear lower bearing (7), the worm-gear reduction mechanism (9) are assembled to form a power-assisted side transmission unit.
4. A double-pinion electric power steering mechanism as claimed in claim 2, characterized in that: the input side transmission unit, the power-assisted servo motor and controller unit (8), the steering main shell (3), the steering tie rod and the rack (11) are assembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123412093.3U CN217415876U (en) | 2021-12-31 | 2021-12-31 | Double-pinion electric power steering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123412093.3U CN217415876U (en) | 2021-12-31 | 2021-12-31 | Double-pinion electric power steering mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217415876U true CN217415876U (en) | 2022-09-13 |
Family
ID=83175193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123412093.3U Active CN217415876U (en) | 2021-12-31 | 2021-12-31 | Double-pinion electric power steering mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217415876U (en) |
-
2021
- 2021-12-31 CN CN202123412093.3U patent/CN217415876U/en active Active
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