CN218953948U - Screw rod bearing supporting member of electric steering gear - Google Patents
Screw rod bearing supporting member of electric steering gear Download PDFInfo
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- CN218953948U CN218953948U CN202223516109.XU CN202223516109U CN218953948U CN 218953948 U CN218953948 U CN 218953948U CN 202223516109 U CN202223516109 U CN 202223516109U CN 218953948 U CN218953948 U CN 218953948U
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- bearing
- screw
- screw rod
- knuckle
- steering gear
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Abstract
The utility model discloses a screw rod bearing supporting member of an electric steering gear; the device comprises a screw rod, a bearing seat, a radial bearing, a shell, a joint bearing, a bearing end cover and two locking nuts; the screw rod, the bearing seat, the radial bearing, the joint bearing, the bearing end cover and the locking nut are all connected in the shell, one end of the screw rod sequentially penetrates through and is connected with the radial bearing, the bearing seat and one locking nut, and the other end of the screw rod sequentially penetrates through and is connected with the joint bearing, the bearing end cover and the other locking nut; the size of the screw support structure of the heavy-duty electric power steering gear can be reduced.
Description
Technical Field
The utility model relates to a screw bearing supporting structure of a heavy-duty electric steering gear, in particular to a screw bearing supporting member of an electric steering gear.
Background
In recent years, with the development of electric motor vehicles, a screw rod is used as an actuator, and is applied to products such as an electric steering gear, an electric control mechanism and the like in the field of the vehicles due to the characteristics of strong bearing capacity, high operation precision and operation stability; for a screw rod in an electric power steering gear, a traditional supporting structure and a traditional supporting method adopt rolling bearing standard components such as tapered roller bearings, angular contact ball bearings and the like, so that the steering function and arrangement requirements of light automobiles (such as passenger cars) can be basically met;
in order to meet the development requirements of dynamoelectric, unmanned and intelligent heavy-duty automobiles, a heavy-duty electric steering gear driven by a lead screw is being developed and designed. Because the output torque of the heavy-duty electric steering gear is about 10 times of that of the electric steering gear of the passenger car, the axial stress of a screw rod of the heavy-duty electric steering gear is very large and a certain radial force is applied; however, the load carrying capacity of the lead screw and bearing is proportional to its size. The screw rod of the common heavy-duty electric steering gear adopts a traditional common rolling bearing standard part, and the number of bearings for supporting the screw rod is large, so that the problem of overlarge axial size of the steering gear is caused; or limited by the axial space of the steering gear, the lead screw support bearing has insufficient bearing capacity, resulting in the problem of low service life of the bearing.
Disclosure of Invention
The utility model aims to provide a screw bearing supporting structure of a heavy-duty electric steering gear, which is compact in structure and can reduce the size of the screw bearing supporting structure of the heavy-duty electric steering gear.
The utility model solves the technical problems by adopting the following technical scheme: the screw rod bearing supporting member of the electric steering gear comprises a screw rod, a bearing seat, a radial bearing, a shell, a joint bearing, a bearing end cover and two locking nuts; the screw rod, the bearing seat, the radial bearing, the joint bearing, the bearing end cover and the locking nut are all connected in the shell, one end of the screw rod sequentially penetrates through and is connected with the radial bearing, the bearing seat and one locking nut, and the other end of the screw rod sequentially penetrates through and is connected with the joint bearing, the bearing end cover and the other locking nut.
Optionally, the screw comprises a screw shell, a screw and a screw shaft shoulder, the screw is connected with the screw shell in a penetrating way, and extension parts are arranged on two sides of the screw shell; one side of the screw rod is provided with a screw rod shaft shoulder which is used for limiting the knuckle bearing.
Optionally, the bearing seat and the bearing end cover are both in threaded connection in the shell, and the bearing seat is provided with a bearing seat shoulder; the bearing end cover is provided with a gear ring and a threaded hole, and the gear ring and the threaded hole are matched and arranged on the outer end face of the bearing end cover.
Optionally, the knuckle bearing adopts an angular contact thrust knuckle bearing, and the contact angle of the knuckle bearing is 30-90 degrees and is used for supporting one end of the screw rod.
Optionally, the number of the joint bearings is two, the two joint bearings are symmetrically and adjacently connected in a face-to-face mode and are arranged on the screw rod, one joint bearing is adjacently connected with the bearing end cover, and the other joint bearing is adjacently connected with the shaft shoulder of the screw rod.
Optionally, the joint bearing is an integrated joint bearing, and one side of the joint bearing is in fit connection with the bearing end cover; the other side is connected with the screw rod shaft shoulder in a fitting way.
Optionally, the screw is any one of a ball screw and a roller screw; the radial bearing is any one of a deep groove ball bearing, a needle bearing, a cylindrical roller bearing and a tapered roller bearing.
The utility model has the following beneficial effects: one end is fixed by adopting a thrust joint bearing and bears bidirectional thrust and radial load, and the other end is supported in a floating way by adopting a radial bearing and bears smaller radial load, so that the size of the screw rod supporting structure of the heavy-duty electric steering gear can be reduced.
Drawings
FIG. 1 is an exploded view of the present utility model;
FIG. 2 is a cross-sectional view of one embodiment of the present utility model;
FIG. 3 is a cross-sectional view of one embodiment of the present utility model;
FIG. 4 is a front view of a bearing end cap of the present utility model;
FIG. 5 is a left side view of the bearing end cap of the present utility model;
the labels in the figures are: 1-a screw rod; 2-bearing seats; 3-radial bearings; 4-a housing; 5-knuckle bearing; 6-a bearing end cap; 7-locking the nut; 11-a screw housing; 12-screw rod; 13-a screw shaft shoulder; 21-bearing seat shoulder; 61-gear ring; 62-threaded holes.
Detailed Description
The technical scheme of the utility model is further described below with reference to the embodiment and the attached drawings.
Example 1
The embodiment provides a screw rod bearing supporting component of an electric steering gear, which comprises a screw rod 1, a bearing seat 2, a radial bearing 3, a shell 4, a joint bearing 5, a bearing end cover 6 and two locking nuts 7; the novel radial ball screw is characterized in that the screw rod 1, the bearing seat 2, the radial ball bearing 3, the joint bearing 5, the bearing end cover 6 and the locking nut 7 are all connected in the shell 4, one end of the screw rod 1 sequentially penetrates through and is connected with the radial ball bearing 3, the bearing seat 2 and the locking nut 7, and the other end of the screw rod 1 sequentially penetrates through and is connected with the joint bearing 5, the bearing end cover 6 and the other locking nut 7.
One end is fixed by adopting a thrust joint bearing 5 and bears bidirectional thrust and radial load, and the other end is supported in a floating way by adopting a radial bearing 3 and bears smaller radial load, so that the size of the screw rod supporting structure of the heavy-duty electric steering gear can be reduced.
In a further implementation manner of the embodiment, the bearing seat 2 and the bearing end cover 6 are both in threaded connection in the shell 4, and the bearing seat 2 is provided with a bearing seat shoulder 21; the bearing end cover 6 is provided with a gear ring 61 and a threaded hole 62, and the gear ring 61 and the threaded hole 62 are matched and arranged on the outer end surface of the bearing end cover 6.
One end of the screw rod 1 is in fit connection with the outer ring of the radial bearing 3 through a bearing seat shoulder 21 arranged on the bearing seat 2, the screw rod 12 is in threaded connection with the locking nut 7, and the locking nut 7 is rotated to achieve the fixing effect on the radial bearing 3; the other end of the screw rod 1 is attached to the outer ring of the joint bearing 5 through a shoulder arranged on the shell 4, and the shell and the bearing end cover clamp the outer ring of the bearing under the action of the clamping force of the bearing end cover 6, so that the fixed clamping is realized.
In a further implementation manner of this embodiment, the knuckle bearing 5 is an angular contact thrust knuckle bearing, and the contact angle of the knuckle bearing 5 is 30 ° -90 °, so as to provide support for one end of the screw rod 1.
In a further implementation manner of this embodiment, the number of the joint bearings 5 is two, the two joint bearings 5 are symmetrically and adjacently connected in a face-to-face manner and are mounted on the screw rod 1, one joint bearing 5 is adjacently connected with the bearing end cover 6, and the other joint bearing 5 is adjacently connected with the screw rod shaft shoulder 13.
One end of the screw rod 1 is a fixed end and is supported by a knuckle bearing 5, the screw rod is an angular contact thrust knuckle bearing, and the contact angle range of the screw rod is 30-90 degrees, more preferably 60-75 degrees; 2 angular contact thrust knuckle bearings are provided; the knuckle bearing 5 is installed face to face; wherein, the small end face of the inner ring of one joint bearing 5 is jointed with a screw shaft shoulder 13, the large end face of the small end face is jointed with the large end face of the inner ring of the other joint bearing 5, and a screw rod 12 penetrates through the inner rings of the two joint bearings 5; one joint bearing 5 seat ring is attached to the blocking shoulder of the shell 4, and the other joint bearing 5 seat ring is attached to the bearing end cover 6;
the other end of the screw rod 1 is supported by a radial bearing 3, the outer ring of the radial bearing 3 is attached to a bearing hole of the bearing seat 2, the end face of the radial bearing 3 is attached to a shoulder of the bearing seat 2, and the screw rod 12 penetrates through the inner ring of the bearing.
In a further implementation manner of the embodiment, the screw 1 includes a screw shell 11, a screw 12, and a screw shaft shoulder 13, the screw 12 is connected with the screw shell 11 in a penetrating manner, and extension portions are arranged on two sides of the screw shell 11 of the screw 12; a screw shaft shoulder 13 is arranged on one side of the screw 12, and the screw shaft shoulder 13 is used for limiting the knuckle bearing 5.
Further implementation of the present embodiment, the screw 1 is either a ball screw or a roller screw; the radial bearing 3 is any one of a deep groove ball bearing, a needle bearing, a cylindrical roller bearing and a tapered roller bearing.
Example 2
The embodiment provides a screw rod bearing supporting component of an electric steering gear, which comprises a screw rod 1, a bearing seat 2, a radial bearing 3, a shell 4, a joint bearing 5, a bearing end cover 6 and two locking nuts 7; the novel radial bearing is characterized in that the screw rod 1, the bearing seat 2, the radial bearing 3, the joint bearing 5, the bearing end cover 6 and the locking nut 7 are all connected in the shell 4, one end of the screw rod 1 sequentially penetrates through and is connected with the radial bearing 3, the bearing seat 2 and the locking nut 7, and the other end of the screw rod 1 sequentially penetrates through and is connected with the joint bearing 5, the bearing end cover 6 and the locking nut 7.
In a further implementation manner of this embodiment, the knuckle bearing 5 is an angular contact thrust knuckle bearing, and the contact angle of the knuckle bearing 5 is 30 ° -90 °, so as to provide support for one end of the screw rod 1.
In a further implementation manner of this embodiment, the knuckle bearing 5 is an integrated knuckle bearing, and one side of the knuckle bearing 5 is in fit connection with the bearing end cover 6; the other side is connected with the screw rod shaft shoulder 13 in a fitting way.
The screw rod 13 passes through the inner ring of the knuckle bearing 5; the back surface of the inner ring of the knuckle bearing 5 is attached to the screw shaft shoulder 13, and the end surface of the knuckle bearing 5 is attached to the lock nut 7; one end face of the seat ring of the knuckle bearing 5 is jointed with the retaining shoulder of the shell 4, and the other end face of the knuckle bearing 5 is jointed with the bearing end cover 6.
The working principle of the utility model is as follows:
one end of the lead screw 1 is provided with a lead screw 12 which penetrates through the inner ring of the joint bearing 5, a lead screw shaft shoulder 13 is attached to the inner ring of the joint bearing 5, and under the action of the clamping force of the locking nut 7, the lead screw shaft neck 13 and the locking nut 7 clamp the inner ring of the joint bearing 5; the shoulder of the shell 4 is attached to the outer ring of the knuckle bearing 5, and under the action of the clamping force of the bearing end cover 6, the shell 4 and the bearing end cover 6 clamp the outer ring of the bearing, so that the end is fixedly clamped; the screw rod 12 at the other end of the screw rod 1 penetrates through the inner ring of the radial bearing 3, the outer ring of the radial bearing 3 is attached to the stop shoulder of the bearing seat 2, under the action of the clamping force of the locking nut 7, the locking force is transmitted to the bearing seat 2, and the locking nut 7 and the bearing seat 2 clamp the radial bearing 3, so that the clamping of the end is realized.
The sequence of the above embodiments is only for convenience of description, and does not represent the advantages and disadvantages of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (7)
1. The screw rod bearing supporting member of the electric steering gear is characterized by comprising a screw rod, a bearing seat, a radial bearing, a shell, a joint bearing, a bearing end cover and two locking nuts; the screw rod, the bearing seat, the radial bearing, the joint bearing, the bearing end cover and the locking nut are all connected in the shell, one end of the screw rod sequentially penetrates through and is connected with the radial bearing, the bearing seat and one locking nut, and the other end of the screw rod sequentially penetrates through and is connected with the joint bearing, the bearing end cover and the other locking nut.
2. The screw bearing supporting member of an electric steering gear according to claim 1, wherein the bearing seat and the bearing end cover are both in threaded connection in the housing, and a bearing seat shoulder is arranged on the bearing seat; the bearing end cover is provided with a gear ring and a threaded hole, and the gear ring and the threaded hole are arranged on the outer end face of the bearing end cover.
3. The electric power steering gear lead screw bearing support member according to claim 1, wherein the knuckle bearing is an angular contact thrust knuckle bearing having a contact angle of 30 ° -90 ° for supporting one end of a lead screw.
4. The electric power steering apparatus screw bearing support member according to claim 3, wherein the number of the knuckle bearings is two, the two knuckle bearings are symmetrically attached and mounted on the screw in a face-to-face manner, one knuckle bearing is attached and connected to the bearing end cap, and the other knuckle bearing is attached and connected to the screw shoulder.
5. A screw bearing support member for an electric power steering gear as claimed in claim 3 wherein the knuckle bearing is an integrated knuckle bearing, one side of the knuckle bearing being in abutting engagement with the bearing end cap and the other side being in abutting engagement with the screw shoulder.
6. The electric power steering gear screw bearing support member according to claim 1, wherein the screw includes a screw housing, a screw shoulder, the screw being connected through the screw housing, the screw being provided with extension portions on both sides of the screw housing; one side of the screw rod is provided with a screw rod shaft shoulder which is used for limiting the knuckle bearing.
7. The electric power steering gear screw bearing support member according to any one of claims 1 to 6, wherein the screw is any one of a ball screw or a roller screw; the radial bearing is any one of a deep groove ball bearing, a needle bearing, a cylindrical roller bearing and a tapered roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223516109.XU CN218953948U (en) | 2022-12-28 | 2022-12-28 | Screw rod bearing supporting member of electric steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223516109.XU CN218953948U (en) | 2022-12-28 | 2022-12-28 | Screw rod bearing supporting member of electric steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218953948U true CN218953948U (en) | 2023-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223516109.XU Active CN218953948U (en) | 2022-12-28 | 2022-12-28 | Screw rod bearing supporting member of electric steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218953948U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116729469A (en) * | 2023-08-09 | 2023-09-12 | 安徽兆睿科技有限责任公司 | Electric power steering gear and steering system |
-
2022
- 2022-12-28 CN CN202223516109.XU patent/CN218953948U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116729469A (en) * | 2023-08-09 | 2023-09-12 | 安徽兆睿科技有限责任公司 | Electric power steering gear and steering system |
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