CN215154985U - Electric circulating ball type mechanical steering gear - Google Patents
Electric circulating ball type mechanical steering gear Download PDFInfo
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- CN215154985U CN215154985U CN202120742844.9U CN202120742844U CN215154985U CN 215154985 U CN215154985 U CN 215154985U CN 202120742844 U CN202120742844 U CN 202120742844U CN 215154985 U CN215154985 U CN 215154985U
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- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 230000003134 recirculating effect Effects 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of auto steering ware and specifically relates to an electronic circulation ball formula machinery steering gear, including screw rod, nut, sector and casing, in screw rod, nut, sector all located the casing, on the screw rod was located to the nut cover, just be equipped with rack and sector meshing on the nut, the sector links to each other through a connecting axle with the steering arm, the screw rod is whole to be arranged in the casing, just it links to each other with the axle head of rotatory input shaft to be equipped with the in-connection hole in the screw rod link, the sector is the tridentate, just the sector includes sector upper portion and sector lower part, be equipped with compression spring between sector upper portion and the sector lower part. The utility model discloses overall structure is more compact, satisfies the whole car design compactedness's of car development requirement.
Description
Technical Field
The utility model belongs to the technical field of auto steering ware and specifically relates to an electronic circulation ball formula mechanical steering ware.
Background
The steering gear is a mechanism used for keeping or changing the driving direction of an automobile, wherein the electric circulating ball type mechanical steering gear mainly comprises a shell, a circulating ball screw nut, a sector gear and the like, the screw, the nut and the sector gear are all arranged in the shell, the nut is sleeved on the screw, a rack is arranged on the nut and meshed with the sector gear, the screw is connected with a rotary input shaft, the screw rotates to drive the nut to move during working, the nut moves to drive the sector gear to rotate, and the sector gear drives a steering arm to rotate. As shown in fig. 3, in the electric recirculating ball type mechanical steering gear of the prior art, a screw rod is extended out of a housing to be connected with a rotary input shaft, and a sector in the housing is generally in a five-tooth structure. Along with the development of the automobile industry, the requirement on the compactness of the whole automobile design is higher and higher, and the design of the steering gear is adjusted along with the design of the automobile, so that the structure of the steering gear is required to be more compact and the quality is smaller on the premise of meeting the steering performance.
In addition, the steering gear is compact in structure and needs to consider how to ensure the meshing force of the sector. Some proposals of guaranteeing the meshing of the sector have been proposed in the prior art, like the utility model patent of the grant publication No. CN203974924U, the name is "a novel fan-shaped steering gear of auto steering ware", it is equipped with reset spring's novel sector to have proposed a downside, and it is equipped with the gear lug in 1 both sides of fan-shaped steering gear body, be equipped with the spring positioning groove in the gear lug, be equipped with a reset spring in every spring positioning groove, just reset spring one end is pegged graft in the spring positioning groove, and other end welded fastening has the connecting seat, on the connecting seat was fixed in the steering gear casing, but this structure reset spring all inclines to set up in order to guarantee that thrust is stable, and this structure is equipped with locating part 40 in the casing inboard in addition and prescribes a limit to the sector and rotates, and above-mentioned structure all need occupy casing inner chamber space, leads to the casing cavity volume great. If the utility model discloses a also proposed a sector structure with elastomeric buffer again as in the utility model patent of grant publication No. CN203805983U, name "auto steering ware", its sector gear includes linkage part and drive assembly, offers the cavity that supplies the sawtooth body to place on the body in the linkage part, is equipped with the regulating part of regulation with the conflict of sawtooth body in the cavity, and be equipped with elastomeric buffer between the bottom face of cavity and the sawtooth body bottom face, but this structure because the unconventional structure of sawtooth body, its elastomeric buffer can support mutually with the sawtooth body perpendicularly, if change conventional sector structure, compression spring buffer when the sector rotates about, compare in patent CN203974924U, its thrust is unstable again.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electronic circulation ball formula mechanical steering ware, overall structure is more compact, satisfies the whole car design compactness's of car development requirement.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides an electronic circulation ball formula mechanical steering ware, includes screw rod, nut, sector and casing, and in the casing was all located to screw rod, nut, sector, the nut cover was located on the screw rod, just be equipped with rack and sector meshing on the nut, the sector links to each other through a connecting axle with the steering arm, the screw rod is whole to be arranged in the casing, just it links to each other with the axle head of rotatory input shaft to be equipped with the interconnection hole in the screw rod link, the sector is the tridentate, just the sector includes sector upper portion and sector lower part, be equipped with compression spring between sector upper portion and the sector lower part.
The inner connecting hole is an inner spline hole or an inner thread hole.
The sector upper portion and the sector lower portion are connected through connecting bolts, the end portions of the connecting bolts are fixedly connected with the upper portion of the sector through threads, and the portion, close to the nut, of the connecting bolts is an optical axis and penetrates through the lower portion of the sector.
The input of screw rod is equipped with the oil blanket, just the oil blanket is located in the inside wall of casing.
And two ends of the screw rod are supported and installed in the shell through bearings.
An arc-shaped shaft supporting plate is arranged in the shell, and the lower part of the sector is arranged in the shaft supporting plate.
The utility model discloses an advantage does with positive effect:
1. the utility model discloses be equipped with the internal connection hole in the screw rod link, can reduce at least 20 mm's axial space, make the structural design of whole steering system more freely.
2. The utility model discloses change the five teeth of traditional sector into tridentate, can make casing jar chamber reduce, reduce the volume to the sector includes sector upper portion and sector lower part two parts, is equipped with compression spring between sector upper portion and sector lower part, guarantees that the meshing also can provide an amount of compensation when the profile of tooth wearing and tearing simultaneously.
Drawings
Figure 1 is a schematic structural diagram of the present invention,
figure 2 is a schematic view of the sector structure of figure 1,
fig. 3 is a schematic structural diagram of an electric recirculating ball type mechanical steering gear in the prior art.
Wherein, 1 is the screw rod, 101 is the internal connection hole, 102 is the outer shaft end, 2 is the nut, 3 is the sector, 301 is the sector upper portion, 302 is the sector lower part, 303 is the connecting bolt, 304 is compression spring, 4 is the casing, 5 is the bearing, 6 is the oil blanket, 7 is the connecting axle, 8 is the key, 9 is the axle layer board.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a screw rod 1, nut 2, sector 3 and casing 4, in casing 4 was all located to screw rod 1, nut 2, sector 3, 2 covers of nut were located on screw rod 1, just be equipped with rack and sector 3 meshing on the nut 2, sector 3 linked to each other through a connecting axle 7 with the arm that turns to, and sector 3 rotates and passes through promptly connecting axle 7 drives the arm that turns to and rotates.
As shown in fig. 1, the screw rod 1 is connected with the rotary input shaft, the screw rod 1 is integrally arranged in the housing 4, an inner connecting hole 101 is arranged in the connecting end of the screw rod 1, the shaft end of the rotary input shaft is inserted into the inner connecting hole 101 to realize connection, the inner connecting hole 101 can be an inner spline hole or an inner thread hole, and the connection mode can reduce the axial space of at least 20mm, so that the structural design of the integral steering system is more free.
As shown in fig. 1-2, the sector 3 is of a three-tooth structure, the sector 3 includes two portions, namely, a sector upper portion 301 and a sector lower portion 302, the sector upper portion 301 and the sector lower portion 302 are respectively embedded on the upper side and the lower side of the connecting shaft 7, the two sides of the sector upper portion 301 and the sector lower portion 302 are connected into a whole through a connecting bolt 303, the end portion of the connecting bolt 303 is fixedly connected with the sector upper portion 301 through a thread, the portion, close to a nut, of the connecting bolt 303 passes through the sector lower portion 302 through an optical axis, a compression spring 304 is arranged between the sector upper portion 301 and the sector lower portion 302, the compression amount of the compression spring 304 can be adjusted through adjusting the connecting bolt 303, the sector upper portion 301 and the sector lower portion 302 are both connected with the connecting shaft 7 through a key 8, an arc-shaped shaft supporting plate 9 is arranged in the housing 4, and the sector lower portion 302 rotates in the shaft supporting plate 9, and the downward displacement of the sector lower part 302 is limited, so that the compression spring 304 is ensured to apply force upwards to ensure that the sector 3 is meshed, and the two sides of the shaft supporting plate 9 can be provided with structures such as limiting blocks or limiting plates according to actual requirements to limit the rotation angle of the sector 3 and ensure that the sector 3 is meshed with the screw 1.
The reduction of the number of teeth of the sector 3 can reduce the cylinder cavity of the housing 4, the structure is more compact, but because the sector 3 of the present invention is reduced compared with the traditional five-tooth structure, the compression spring 304 can provide upward elastic force to ensure the meshing between the sector 3 and the rack on the nut 2, especially the meshing between the sector 3 and the rack on the nut 2 when the corner is large, and the compression spring 304 rotates along with the sector 3, the spring does not need to be inclined to ensure the thrust as in patent CN203974924U, the space in the cavity of the housing 4 is saved, on the other hand, the tooth-shaped end part can be worn after the steering gear is used for a long time, the compression spring 304 can also provide a certain upward compensation amount to continue to mesh the sector 3 and the rack, the service life of the steering gear is prolonged, as shown in fig. 2, when the compression spring 304 is in a fully compressed state after the sector 3 and the nut 2 are assembled, a gap is left between the nut of the connection bolt 303 and the matching surface in the sector lower part 302 to satisfy the compensation requirement, in addition, the arrangement of the shaft supporting plate 9 ensures that the compression spring 304 applies force upwards, and meanwhile, structures such as a limiting part do not need to be arranged on the side wall of the shell 4, and the space in the cavity of the shell 4 is saved.
In this embodiment, the sector design parameters are as follows: module 6, tooth number 12, stroke 57mm, center distance 71mm, transmission ratio 20.56, cutting angle 6.5 degrees, rocker arm rotation angle 90 degrees, and sector 3 is tridentate.
As shown in fig. 1, two ends of the screw rod 1 are supported and installed in the housing 4 through bearings 5, an oil seal 6 is arranged at the input end of the screw rod 1, and the oil seal 6 is arranged in the inner side wall of the housing 4.
The utility model discloses a theory of operation does:
as shown in fig. 3, in the electric recirculating ball type mechanical steering gear of the prior art, the screw 1 is connected with the rotary input shaft by the external shaft end 102 extending out of the housing 4, and the oil seal 6 is provided in the external side wall of the input side of the housing 4, and the sector 3 in the housing 4 is usually of a five-tooth structure.
As shown in figures 1-2, in order to make the structure of the utility model more compact, the screw rod 1 is integrally arranged in the shell 4, and an inner connection hole 101 is provided in the connection end of the screw 1, the shaft end of the rotary input shaft is inserted into the inner connection hole 101 to be connected, the connecting mode can reduce the axial space of at least 20mm, so that the structural design of the whole steering system is more free, in addition, the gear sector 3 is changed into three teeth from five teeth, so that the cylinder cavity of the shell 4 can be reduced, and, in order to ensure the engagement, the sector 3 is designed as two parts of the sector upper part 301 and the sector lower part 302, a compression spring 304 is arranged between the upper sector part 301 and the lower sector part 302 to ensure that the sector 3 is meshed with the rack on the nut 2, and after the steering gear is used for a long time, the tooth-shaped end part can be worn, and the compression spring 304 can also provide a certain upward compensation amount, so that the service life of the steering gear is prolonged.
Claims (6)
1. The utility model provides an electronic circulation ball formula mechanical steering ware, includes screw rod, nut, sector and casing, and in the casing was all located to screw rod, nut, sector, the nut cover was located on the screw rod, just be equipped with rack and sector meshing on the nut, the sector links to each other its characterized in that through a connecting axle with the steering arm: casing (4) is wholly arranged in to screw rod (1), just it is continuous with the axle head of rotatory input shaft to be equipped with in-connection hole (101) in screw rod (1) link, sector (3) are the tridentate, just sector (3) are including sector upper portion (301) and sector lower part (302), be equipped with compression spring (304) between sector upper portion (301) and sector lower part (302).
2. The electric recirculating ball mechanical diverter of claim 1, wherein: the inner connecting hole (101) is an inner spline hole or an inner thread hole.
3. The electric recirculating ball mechanical diverter of claim 1, wherein: connection bolt (303) is passed through to sector upper portion (301) and sector lower part (302) both sides and is connected, just connecting bolt (303) tip links firmly with sector upper portion (301) screw thread, connecting bolt (303) are close to the part of nut and are the optical axis and pass sector lower part (302).
4. The electric recirculating ball mechanical diverter of claim 1, wherein: the input of screw rod (1) is equipped with oil blanket (6), just oil blanket (6) are located in the inside wall of casing (4).
5. The electric recirculating ball mechanical diverter of claim 1, wherein: and two ends of the screw rod (1) are supported and installed in the shell (4) through bearings (5).
6. The electric recirculating ball mechanical diverter of claim 1, wherein: an arc-shaped shaft supporting plate (9) is arranged in the shell (4), and the lower portion (302) of the sector is arranged in the shaft supporting plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120742844.9U CN215154985U (en) | 2021-04-13 | 2021-04-13 | Electric circulating ball type mechanical steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120742844.9U CN215154985U (en) | 2021-04-13 | 2021-04-13 | Electric circulating ball type mechanical steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215154985U true CN215154985U (en) | 2021-12-14 |
Family
ID=79356991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120742844.9U Active CN215154985U (en) | 2021-04-13 | 2021-04-13 | Electric circulating ball type mechanical steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215154985U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116552624A (en) * | 2023-06-02 | 2023-08-08 | 一汽解放汽车有限公司 | Auxiliary Support Structures and Steering Gears |
-
2021
- 2021-04-13 CN CN202120742844.9U patent/CN215154985U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116552624A (en) * | 2023-06-02 | 2023-08-08 | 一汽解放汽车有限公司 | Auxiliary Support Structures and Steering Gears |
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