CN216279277U - Worm gear clearance adjustment mechanism - Google Patents
Worm gear clearance adjustment mechanism Download PDFInfo
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- CN216279277U CN216279277U CN202122266222.6U CN202122266222U CN216279277U CN 216279277 U CN216279277 U CN 216279277U CN 202122266222 U CN202122266222 U CN 202122266222U CN 216279277 U CN216279277 U CN 216279277U
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Abstract
A worm and gear clearance adjusting mechanism comprises a worm gear shell, a worm gear, a worm bearing A, a worm bearing B, C type bushing, an adjusting mechanism shell, a push rod, an elastic element, a worm bearing A and the upper end of the worm are connected. And the C-shaped bush is provided with a push rod through hole for the right end of the push rod to pass through, the right end of the push rod is propped against the outer ring of the worm bearing A, and the left end of the push rod is connected with the push rod connecting counter bore in a sliding manner. The elastic element is arranged between the left end of the ejector rod and the bottom of the hole of the ejector rod connecting counter bore. The left end of the adjusting mechanism shell is in threaded connection with the corresponding part of the worm gear shell through an external thread structure, and the right end of the adjusting mechanism shell is in clearance fit with the corresponding part of the worm gear shell. The lower end of the worm is connected with a worm bearing B. The utility model can realize the adjustment of the corresponding clearance between the worm and the gear by only properly rotating the adjusting mechanism shell, has the advantages of simple structure and high adjusting efficiency, can effectively prevent the relevant parts of the utility model from being polluted by sundries, and improves the convenience of assembly.
Description
Technical Field
The utility model relates to a worm and gear power-assisted system structure used in an automobile electric steering system, in particular to a worm and gear clearance adjusting mechanism.
Background
Currently, in the development of the whole vehicle, the electric power steering system is more and more commonly applied. And a worm and gear power assisting structure in the electric steering system is most commonly used. Along with the higher and higher performance requirement of the whole vehicle, the performance requirement of the worm and gear power-assisted structure is higher and higher, on one hand, the friction torque of the worm and gear is required to be as small as possible, and on the other hand, no abnormal sound is required to be generated in the using process. To reduce the friction torque, the most effective method is to increase the worm gear backlash. However, the meshing clearance is increased, and abnormal noise is easily generated in the using process, so the two requirements of increasing the meshing clearance and reducing the abnormal noise become a pair of contradictions.
Application No. 202010621288.X, application publication No. CN 111692318A, entitled "a worm gear clearance adjustment structure" discloses a worm gear clearance adjustment mechanism: "is used for among the worm gear reduction unit for electric power steering gear, its scheme is: the worm wheel and the worm wheel shaft are supported and installed in the worm wheel installation cavity through bearings, two ends of the worm are supported in the worm through the deep groove ball bearing, the worm is meshed with the worm wheel, the axial clearance of the deep groove ball bearing is adjusted through the adjusting nut, the axial clearance between the worm and the worm wheel is adjusted, the radial clearance of the deep groove ball bearing is adjusted through the pressing block nut and the cambered surface pressing block, and the radial clearance between the worm and the worm wheel is adjusted. The clearance adjusting mechanism is novel in structure, but the axial clearance of the deep groove ball bearing and the radial clearance of the deep groove ball bearing are respectively adjusted by two adjusting mechanisms for complete clearance adjustment, so that the axial clearance between the worm and the worm wheel and the radial clearance between the worm and the worm wheel are respectively adjusted, and the clearance adjusting operation efficiency is low.
Disclosure of Invention
The utility model mainly aims to provide a worm and gear clearance adjusting mechanism which can adjust the corresponding clearance between a worm and a worm wheel by using one set of adjusting mechanism.
The technical scheme adopted by the utility model is as follows: a worm and gear clearance adjusting mechanism comprises a worm gear shell, a worm gear, a worm bearing A, a worm bearing B, C type bush, an adjusting mechanism shell, a top rod and an elastic element;
the worm bearing A is a deep groove ball bearing; the worm bearing A is connected with the upper end of the worm; the worm bearing A is positioned in the C-shaped opening of the C-shaped bushing, a push rod through hole for the right end of the push rod to pass through is formed in the C-shaped bushing, the end face of the right end of the push rod is a curved surface protruding rightwards, and the right end of the push rod penetrates through the push rod through hole and then pushes against the outer ring of the worm bearing A; the left end of the ejector rod is positioned in an ejector rod connecting counter bore at the right end of the adjusting mechanism shell, and the left end of the ejector rod is connected with the ejector rod connecting counter bore in a sliding mode. The right end of the elastic element is propped against the left end of the ejector rod, and the left end of the elastic element is propped against the hole bottom of the ejector rod connecting counter bore. The diameter of the left end of the adjusting mechanism shell is larger than that of the right end of the adjusting mechanism shell, the left end of the adjusting mechanism shell is in threaded connection with the corresponding part of the worm gear shell through an external thread structure, and the right end of the adjusting mechanism shell is in clearance fit with the corresponding part of the worm gear shell;
the lower end of the worm is a power input end, and a worm bearing B connected with the lower end of the worm is a self-aligning bearing.
Preferably, a sealing ring is arranged between the right end of the adjusting mechanism shell and the corresponding part of the worm gear shell.
Preferably, a counter bore is arranged between the end face of the upper end of the worm and the corresponding outer surface of the worm gear shell, and a sealing blocking cover is fixedly arranged in the counter bore.
Preferably, the elastic element is a coil spring, a belleville spring or a rubber block.
When the adjusting mechanism is used, the corresponding clearance between the worm and the gear can be adjusted by only rotating the adjusting mechanism shell properly, so that the adjusting mechanism has the advantages of simple structure and high adjusting efficiency. Due to the arrangement of the sealing ring and the sealing blocking cover, the related parts of the utility model can be effectively prevented from being polluted by sundries, and the convenience of assembly is improved; the elastic element can be a spiral spring, a belleville spring or a rubber block, and the source of the elastic element is rich. In summary, the present invention is a very excellent gap adjustment mechanism for worm and gear.
Drawings
FIG. 1: the utility model has a structure schematic diagram;
in the figure: the worm gear comprises a worm gear housing 1, a worm gear 2, a worm 3, a worm bearing A4, a worm bearing B5, a C-shaped bushing 6, an adjusting mechanism housing 7, a push rod 8, an elastic element 9, a sealing ring 10 and a sealing blocking cover 11.
Detailed Description
The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.
The first embodiment is as follows:
as shown in FIG. 1, the utility model comprises a worm gear housing 1, a worm gear 2, a worm 3, a worm bearing A4, a worm bearing B5, a C-shaped bushing 6, an adjusting mechanism housing 7, a push rod 8, an elastic element 9, a sealing ring 10 and a sealing cover 11. In this embodiment, the elastic element 9 is a coil spring;
wherein the worm bearing A4 is a deep groove ball bearing; the worm bearing A4 is connected with the upper end of the worm 3, the worm bearing A4 is positioned in a C-shaped opening of a C-shaped liner 6, a push rod through hole for the right end of a push rod 8 to pass through is formed in the C-shaped liner 6, the end face of the right end of the push rod 8 is a curved surface protruding towards the right, and the right end of the push rod 8 penetrates through the push rod through hole and then pushes against the outer ring of the worm bearing A4; the left end of the ejector rod 8 is located in an ejector rod connecting counter bore at the right end of the adjusting mechanism shell 7, the left end of the ejector rod 8 is connected with the ejector rod connecting counter bore in a sliding mode, the left end of the ejector rod 8 is provided with a counter bore matched with the elastic element 9, the right end of the elastic element 9 is located in the counter bore and abuts against the bottom of the counter bore, the right end of the elastic element 9 abuts against the left end of the ejector rod 8, and the left end of the elastic element 9 abuts against the bottom of the counter bore connected with the ejector rod. The diameter of the left end of the adjusting mechanism shell 7 is larger than that of the right end of the adjusting mechanism shell, and the left end of the adjusting mechanism shell 7 is in threaded connection with the corresponding part of the worm gear shell 1 through an external thread structure. The right end of the adjusting mechanism shell 7 is in clearance fit with the corresponding part of the worm gear shell 1, the right end of the adjusting mechanism shell 7 is provided with an annular groove matched with the sealing ring 10, and the sealing ring 10 is arranged in the annular groove. A counter bore which is connected with the sealing and blocking cover 11 is arranged between the upper end face of the worm 3 and the corresponding outer surface of the worm wheel shell 1, and the corresponding sealing and blocking cover 11 is fixedly arranged in the counter bore.
The lower end of the worm 3 is a power input end, and a worm bearing B5 connected with the lower end of the worm 3 is a self-aligning bearing.
Example two: the difference between the second embodiment and the first embodiment is that in the second embodiment, the elastic element 9 is a belleville spring, the left end of the elastic element 9 abuts against the bottom of a counter bore which is arranged at the left end of the ejector 8 and is matched with the elastic element 9, and the right end of the elastic element 9 abuts against the left end face of the ejector 8.
Example three:
the third embodiment is different from the second embodiment in that the elastic member 9 is a rubber block.
The above embodiments are merely preferred embodiments of the present invention, and not intended to limit the structure and scope of the utility model. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes in the shapes, structures and design objectives of the present invention are intended to be covered by the present invention, and all such equivalent changes are intended to be protected by the present invention.
Claims (6)
1. A worm and gear clearance adjusting mechanism comprises a worm gear shell (1), a worm gear (2), a worm (3), a worm bearing A (4) and a worm bearing B (5); the method is characterized in that: the device also comprises a C-shaped bush (6), an adjusting mechanism shell (7), a push rod (8) and an elastic element (9);
the worm bearing A (4) is a deep groove ball bearing; the worm bearing A (4) is connected with the upper end of the worm (3), the worm bearing A (4) is positioned in a C-shaped opening of a C-shaped lining (6), a top rod through hole for the right end of a top rod (8) to pass through is formed in the C-shaped lining (6), the end face of the right end of the top rod (8) is a curved surface which is convex towards the right, and the right end of the top rod (8) is pressed against the outer ring of the worm bearing A (4) after passing through the top rod through hole; the left end of the ejector rod (8) is positioned in an ejector rod connecting counter bore at the right end of the adjusting mechanism shell (7), and the left end of the ejector rod (8) is connected with the ejector rod connecting counter bore in a sliding manner; the right end of the elastic element (9) is propped against the left end of the ejector rod (8), and the left end of the elastic element (9) is propped against the hole bottom of the ejector rod connecting counter bore; the diameter of the left end of the adjusting mechanism shell (7) is larger than that of the right end of the adjusting mechanism shell, and the left end of the adjusting mechanism shell (7) is in threaded connection with the corresponding part of the worm gear shell (1) through an external thread structure; the right end of the adjusting mechanism shell (7) is in clearance fit with the corresponding part of the worm gear shell (1);
the lower end of the worm (3) is a power input end, and a worm bearing B (5) connected with the lower end of the worm (3) is a self-aligning bearing.
2. The worm gear clearance adjustment mechanism of claim 1, wherein: a sealing ring (10) is arranged between the right end of the adjusting mechanism shell (7) and the corresponding part of the worm gear shell (1).
3. The worm gear clearance adjustment mechanism of claim 1, wherein: a counter bore is arranged between the end face of the upper end of the worm (3) and the corresponding outer surface of the worm gear shell (1), and a sealing blocking cover (11) is fixedly arranged in the counter bore.
4. The worm gear clearance adjustment mechanism of claim 1, wherein: the elastic element (9) is a helical spring.
5. The worm gear clearance adjustment mechanism of claim 1, wherein: the elastic element (9) is a belleville spring.
6. The worm gear clearance adjustment mechanism of claim 1, wherein: the elastic element (9) is a rubber block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122266222.6U CN216279277U (en) | 2021-09-17 | 2021-09-17 | Worm gear clearance adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122266222.6U CN216279277U (en) | 2021-09-17 | 2021-09-17 | Worm gear clearance adjustment mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216279277U true CN216279277U (en) | 2022-04-12 |
Family
ID=81064682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122266222.6U Active CN216279277U (en) | 2021-09-17 | 2021-09-17 | Worm gear clearance adjustment mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216279277U (en) |
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2021
- 2021-09-17 CN CN202122266222.6U patent/CN216279277U/en active Active
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