CN211167077U - Recirculating ball steering gear - Google Patents
Recirculating ball steering gear Download PDFInfo
- Publication number
- CN211167077U CN211167077U CN201921211843.0U CN201921211843U CN211167077U CN 211167077 U CN211167077 U CN 211167077U CN 201921211843 U CN201921211843 U CN 201921211843U CN 211167077 U CN211167077 U CN 211167077U
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- nut
- screw rod
- steering gear
- recirculating ball
- screw
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Abstract
The utility model discloses a circulation ball steering gear, including casing, screw rod, nut and rocking arm axle, screw rod and nut rotate to be connected and set up in the intracavity of casing, and the steel ball is placed in the airtight pipeline between nut and screw rod for change the sliding friction between the nut screw rod into rolling friction, steering gear drive ratio is 17.5:1, and rocking arm axle output end is 32 teeth altogether, is separated by 90 between two adjacent teeth0. Adopt the utility model provides a recirculating ball steering gear has higher transmission efficiency, and it is light comfortable to control the comparison, and wearing and tearing are little, improve and turn to stability for recirculating ball steering gear compact structure, the installation of being convenient for.
Description
Technical Field
The utility model belongs to the technical field of auto steering ware, in particular to recirculating ball steering gear.
Background
The recirculating ball steering gear is widely applied to automobiles and is used for realizing steering of the automobiles, and relative rotation is realized through a steel ball arranged between steering nuts, so that a traveling gear on a steering arm is driven to rotate, and steering is realized. With the improvement of the quality of the whole vehicle, the steering operation performance is further improved. When the automobile steers, the transmission route of the steering system which only can strange force is as follows: the steering wheel, the steering shaft, the steering universal joint, the steering transmission shaft and the steering gear are used for changing the motion direction, reducing the speed and increasing the torque and then transmitting the motion direction, the speed and the torque to the steering rocker arm. Since traffic accidents caused by the faults of the automobile steering system occur occasionally, the steering system is one of important safety parts of the automobile. Although recirculating ball steering gears have been used in automobiles for decades, there are still some technical drawbacks.
The circulating ball steering gear is generally provided with two stages of transmission pairs, wherein the first stage is a screw nut transmission pair, and the second stage is a rack and pinion sector Chundongfu or a slide block crank pin transmission pair. Through carrying out deep analysis on each link influencing the performance of the steering gear and researching the structure and the mutual matching relation of each component of the mechanical circulation steering gear, the efficiency of the conventional mechanical circulation ball steering gear can be found to be further improved. In addition, the steering screw of the existing circulating ball steering gear deforms under the action of bending moment and torque, so that the stress of the steel ball in the raceway is uneven, and the steering gear can bear a small input torque value. Therefore, there is a need for further improvements in existing recirculating ball diverters to improve diverter efficiency, reduce fit clearance, and reduce oil leakage.
SUMMERY OF THE UTILITY MODEL
The utility model is used for solve the technical problem that prior art exists to a recirculating ball steering gear is provided.
In order to solve the technical problem, the utility model provides a circulation ball steering gear, including casing, screw rod, nut, and rocking arm axle, screw rod and nut rotate to be connected and set up in the intracavity of casing, the nut has the helicla flute of same parameter with screw rod processing, the rack is processed into to the one side of nut, place in the airtight pipeline between nut and screw rod with the gear sector part meshing steel ball of rocking arm axle, be used for changing the sliding friction between the nut screw rod into rolling friction, steering gear drive ratio is 17.5:1, rocking arm axle output end 32 teeth altogether, be 90 at a distance from between two adjacent teeth°The tail of the screw rod is provided with a plurality of oil inlets and a plurality of oil return ports, and the screw rod penetrates through the shell.
As a novel further improvement of the present application, the distance between two adjacent teeth at the output end of the rocker shaft is 90°。
As a further improvement of the utility model, the screw rod is supported for the bearing at the support at both ends.
As a new further improvement of the present application, the screw further comprises an elastic element arranged between the nut and the screw.
As a further improvement of the novel screw, the screw material is low hardenability steel 60 Ti.
As an improvement of the utility model, the casing is an aluminum casting integrated structure.
The utility model discloses beneficial effect:
the utility model provides a recirculating ball steering gear has following advantage.
1. The transmission efficiency is high, the operation is light and comfortable, the abrasion of mechanical parts is small, and the service life is long.
2. The volume is small, the weight is light, and the installation is convenient;
3. the screw rod 2 is provided with supports at two ends, so that the transmission and stress performance can be improved, the steering stability is improved, and the recirculating ball steering gear is compact in structure and convenient to install.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the recirculating ball steering gear of the present invention;
figure 2 is a front view of the circulating ball steering gear of the utility model,
wherein: 1-shell, 4-rocker shaft;
FIG. 3 is a view of the recirculating ball steering gear of the present invention;
wherein: 2-screw, 3-nut, 5-ball;
FIG. 4 is a schematic view of the structure of the output end of the rocker shaft 4 of the present invention;
fig. 5 is a schematic position diagram of the bearings 11 and 12 according to embodiment 2 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides a recirculating ball steering gear structure sketch map is as shown in figure 1, including casing, screw rod, nut and rocking arm axle, screw rod and nut rotate to be connected and set up in the intracavity of casing, and the steel ball is placed in the airtight pipeline between nut and the screw rod for sliding friction between nut and the screw rod changes rolling friction into. The transmission ratio of the steering gear is 17.5:1, the output end of the rocker shaft has 32 teeth, and the interval between two adjacent teeth is 85°~90°And the tail part of the screw rod is provided with a plurality of oil inlets and a plurality of oil return ports, and the screw rod penetrates through the shell.
The axial clearance is difficult to adjust, and the screw rods are provided with supports at two ends for reducing the axial clearance. Therefore, the transmission and acceptance performance can be improved, the steering stability is improved, and the circulating ball steering gear is compact in structure and convenient to install.
Example 1
As shown in fig. 2, the recirculating ball type steering gear includes a housing 1, a screw 2, a nut 3 and a rocker shaft 4, and the recirculating ball refers to a steel ball 5 placed in a closed pipeline between the nut 3 and the screw 2, and is used for converting sliding friction between the nut 3 and the screw 2 into rolling friction with small resistance. The nut 3 and the screw rod 2 are processed with spiral grooves with the same parameters. One surface of the nut 3 is processed into a rack which is meshed with the gear sector part of the rocker arm shaft 4. In order to show the screw rod 2 and the nut 3 which are positioned in the shell 1, a partial sectional view of the shell is shown in fig. 3, when the screw rod 2 fixed with a steering column of a steering wheel is rotated, the screw rod 2 pushes the nut 3 to move up and down, and the nut 3 drives the steering rocker arm to swing back and forth through a gear so as to realize steering. During the process, the steel ball 5 circularly and reciprocally rolls in the closed pipeline. The recirculating ball steering gear relies more on rolling friction, so that the recirculating ball steering gear has higher transmission efficiency, is lighter and more comfortable to operate, has less abrasion to mechanical parts and has relatively longer service life.
The nut 3 and the screw rod 2 are processed with spiral grooves with the same parameters. One surface of the nut 3 is processed into a rack which is meshed with the gear sector part of the rocker arm shaft, when the screw 2 is rotated, the nut 3 does not rotate, and only moves axially to drive the gear sector of the rocker arm shaft 4 to rotate. In order to reduce the brightness between the screw rod 2 and the nut 3, a plurality of steel balls are arranged between the screw rod and the nut to realize rolling friction.
As shown in FIG. 4, the output end of the rocker arm shaft 4 has 32 teeth, and two adjacent teeth are 90-90 apart°。
Preferably, an elastic member is provided between the nut 3 and the screw 2 for compensating for a backlash of the steering nut 3 and the rocker shaft 4 to improve steering operability.
Preferably, the recirculating ball steering gear shell is of an integrally molded structure made of aluminum casting.
The utility model discloses a 4 spiral directions of screw rod are dextrorotation, and the drive ratio is 17.5:1 the utility model provides a recirculating ball steering gear, maximum operating pressure is 10.34MPa, the working flow is 8.71~ 13.2L/min, the biggest output torque that can realize is 1314Nm, the output pivot angle is 43 Nm°30, the total input turns are 4.2, and the working temperature can be-40 to +135 ℃.
Example 2
In the recirculating ball steering gear shown in fig. 5, the supports at both ends of the screw are bearing supports (11, 12). The shaft diameter of the screw is supported on the two thrust bearings and is fixed by adopting an adjustable bearing cover, the adjustable bearing cover can adjust the thrust ball bearings, and the adjustable bearing cover is locked by a locking nut to prevent the bearing cover from loosening.
Most of the existing circulating ball steering gear screws adopt 20CrMnTi steel for carburizing heat treatment, and the quenching deformation is large in the carburizing process. The screw rod material is preferably low-hardenability steel 60Ti, the series of problems in the carburizing heat treatment process can be avoided by adopting the 60Ti material to manufacture the circulating ball steering gear screw rod, the depth of a hardening layer of a raceway working surface is greatly increased, and the product quality is stable.
The scope of protection of the present invention is not limited to this, and any changes or substitutions that can be conceived without the creative work should be included in the scope of protection of the present invention. The protection scope of the present invention is subject to the protection scope defined by the claims.
Claims (6)
1. A circulating ball steering gear is characterized by comprising a shell (1), a screw rod (2), a nut (3) and a rocker arm shaft (4), wherein the screw rod (2) and the nut (3) are rotatably connected and arranged in a cavity of the shell, supports are arranged at two ends of the screw rod (2), spiral grooves with the same parameters are machined in the nut (3) and the screw rod (2), one surface of the nut (3) is machined into a rack and meshed with a sector part of the rocker arm shaft (4), a steel ball (5) is placed in a closed pipeline between the nut (3) and the screw rod (2) and used for converting sliding friction between the nut (3) and the screw rod (2) into rolling friction, the transmission ratio of the steering gear is 17.5:1, the output end of the rocker arm shaft (4) has 32 teeth, and the distance between every two adjacent teeth is 85 DEG°~90°The tail of the screw rod (2) is provided with a plurality of oil inlets and a plurality of oil return ports, and the screw rod (2) penetrates through the shell (1).
2. The recirculating ball diverter of claim 1, wherein adjacent teeth are spaced 90 degrees apart°。
3. A recirculating ball diverter according to claim 1, wherein the support of the screw (2) at both ends is a bearing (11, 12) support.
4. The recirculating ball redirector of claim 1, further comprising a resilient element disposed between the nut (3) and the screw (2).
5. The recirculating ball redirector of claim 1, wherein the screw (2) material is low hardenability steel 60 Ti.
6. The recirculating ball redirector of claim 1, wherein the housing (1) is a cast aluminum one-piece structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921211843.0U CN211167077U (en) | 2019-07-30 | 2019-07-30 | Recirculating ball steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921211843.0U CN211167077U (en) | 2019-07-30 | 2019-07-30 | Recirculating ball steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211167077U true CN211167077U (en) | 2020-08-04 |
Family
ID=71818244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921211843.0U Active CN211167077U (en) | 2019-07-30 | 2019-07-30 | Recirculating ball steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211167077U (en) |
-
2019
- 2019-07-30 CN CN201921211843.0U patent/CN211167077U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 266318 No. 1, Luanhe Road, Jiaozhou economic and Technological Development Zone, Qingdao, Shandong Patentee after: Qingdao Jianbang Automobile Technology Co.,Ltd. Address before: 266300 No. 1 Luanhe Road, Jiaozhou national economic and Technological Development Zone, Qingdao, Shandong Patentee before: QINGDAO JIANBANG SUPPLY CHAIN CO.,LTD. |
|
| CP03 | Change of name, title or address |