CN219989322U - Speed reduction transmission mechanism of automobile steering gear with oil leakage prevention function - Google Patents
Speed reduction transmission mechanism of automobile steering gear with oil leakage prevention function Download PDFInfo
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- CN219989322U CN219989322U CN202321402546.0U CN202321402546U CN219989322U CN 219989322 U CN219989322 U CN 219989322U CN 202321402546 U CN202321402546 U CN 202321402546U CN 219989322 U CN219989322 U CN 219989322U
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- automobile steering
- bearing
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 230000009467 reduction Effects 0.000 title claims abstract description 25
- 230000002265 prevention Effects 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 10
- 238000013461 design Methods 0.000 description 5
- 239000004519 grease Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- General Details Of Gearings (AREA)
- Power Steering Mechanism (AREA)
Abstract
The utility model relates to a speed reduction transmission mechanism of an automobile steering gear with an oil leakage prevention function, and belongs to the field of automobile power-assisted steering systems. The speed reduction transmission mechanism of the automobile steering gear comprises a shell, a worm wheel, a worm and a motor; the worm wheel is arranged in the shell; a worm is arranged below the worm wheel through a front bearing and a rear bearing; a motor is arranged on the shell at one end of the worm; one end of the motor is connected with the worm; a blocking cover is fixedly arranged on the shell at the other end of the worm; a sealing ring is arranged between the blanking cover and the shell; the outer side of the front bearing is provided with an adjusting sheath; an adjusting screw is connected with the shell on one side of the adjusting sheath in a threaded manner; a buffer spring is arranged between the adjusting screw and the adjusting sheath. The speed reduction transmission mechanism of the automobile steering gear with the oil leakage prevention function solves the problems that the speed reduction transmission mechanism of the existing automobile steering gear is easy to leak oil and easy to generate abnormal sound, and is particularly suitable for the use requirement of the automobile steering gear.
Description
Technical Field
The utility model relates to a speed reduction transmission mechanism of an automobile steering gear with an oil leakage prevention function, and belongs to the field of automobile power-assisted steering systems.
Background
In an automobile EPS steering system, a speed reduction transmission mechanism is usually in the form of a worm wheel and a worm, resin is usually adopted as a material of the worm wheel for reducing rattling noise, friction force change can be caused by expansion and contraction of the resin worm wheel in a temperature and humidity changing environment, so that grease is required to provide proper lubrication for worm wheel and worm meshing, but when a vehicle runs in a hot environment, grease in a worm cavity of a worm wheel of a shell can be separated out along with temperature rise and drop down along a pipe column gap, and the use feeling and comfort of a driver are affected. And after long-term use, grease at the meshing position of the worm and the worm gear is completely separated out and flows to two sides, so that the meshing position of the worm and the worm gear is not lubricated, and poor feedback of abnormal sounds of the product after sale can be caused.
However, the existing shell mostly adopts a part matching design, uses a plurality of parts to mutually match, and adopts a bolt to carry out stress application to seal. The requirements on the machining size of parts are high, the installation and matching precision is complex, the tightness is poor after long-term use, and gaps are easily caused by the attenuation of the performances of bolts, so that grease in a worm gear cavity of a shell can be separated out along with the rising of temperature, and drops downwards along a pipe column gap, the use feeling and the comfort of a driver are affected, and the problem that abnormal sound is easily generated in the later stage of a product is caused.
It is therefore necessary to develop a new reduction gear mechanism for a steering gear of a vehicle to solve the above problems existing in the reduction gear mechanism of the existing steering gear of the vehicle.
Disclosure of Invention
The utility model aims at: the utility model provides a speed reduction transmission mechanism of an automobile steering gear with an oil leakage prevention function, which aims to solve the problem that a shell of the speed reduction transmission mechanism of the existing automobile steering gear is mutually matched with various parts and is sealed in a mode of applying force by bolts. The requirements on the machining size of parts are high, the installation and matching precision is complex, the tightness is poor after long-term use, and gaps are easily caused by the attenuation of the performances of bolts, so that the problems that grease in a worm gear cavity of a shell can be separated out along with the rising of temperature and drop down to a low point along a pipe column gap, and abnormal sound is easily generated in the product are solved.
The technical scheme of the utility model is as follows:
a speed reduction transmission mechanism of an automobile steering gear with an oil leakage prevention function comprises a shell, a worm wheel, a worm and a motor; the worm wheel is arranged in the shell; a worm is arranged below the worm wheel through a front bearing and a rear bearing; the worm is meshed with the worm wheel; a motor is arranged on the shell at one end of the worm; one end of the motor is connected with the worm; the method is characterized in that: a blocking cover is fixedly arranged on the shell at the other end of the worm; a sealing ring is arranged between the blanking cover and the shell; the outer side of the front bearing is provided with an adjusting sheath; an adjusting screw is connected with the shell on one side of the adjusting sheath in a threaded manner; a buffer spring is arranged between the adjusting screw and the adjusting sheath.
The shell is provided with a worm gear chamber; a transmission cavity is arranged below the worm gear cavity; one end of the transmission cavity is provided with a bearing position A; the other end of the transmission cavity is provided with a bearing position B; the bearing position A is internally provided with a front bearing; the bearing position B is internally provided with a rear bearing; a threaded adjusting hole is formed in the shell below the bearing position A; an adjusting screw is arranged in the threaded adjusting hole.
A blocking cover position is arranged on the shell at one end of the bearing position A; the port of the plugging cover position is provided with a chamfer surface; the shell is provided with a blocking cover through a blocking cover position.
The blocking cover is in a stepped structure; the step of the blanking cover is provided with a sealing ring groove; a sealing ring is arranged between the sealing ring groove of the blocking cover and the chamfer surface of the blocking cover position of the shell.
The worm gear is characterized in that a plurality of groups of clamping teeth are uniformly arranged on the outer side of the worm gear, external threads matched with the clamping teeth are uniformly arranged on the outer side of the worm, and the worm is meshed and connected with the worm gear through the mutual matching of the external threads and the clamping teeth.
The utility model has the advantages that:
according to the speed reduction transmission mechanism of the automobile steering gear with the oil leakage prevention function, the structural design that the sealing ring is arranged in the shell, the adjusting sheath and the buffer spring are arranged at the front bearing is adopted, after the design is adopted, the sealing performance of the transmission mechanism is improved, the oil leakage risk is reduced, and the matching clearance between the worm and the worm wheel can be compensated in a mode of operating the adjusting screw, so that the worm and the worm wheel can be matched with each other well, friction sound can be reduced, the risk of abnormal sound is reduced, and the problem that the speed reduction transmission mechanism of the existing automobile steering gear is prone to oil leakage and abnormal sound is solved, so that the speed reduction transmission mechanism is particularly suitable for use requirements of the automobile steering gear.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;
FIG. 3 is a schematic view of the structure of the housing of the present utility model;
fig. 4 is an enlarged schematic view of the structure at B in fig. 1.
In the figure: 1. a housing; 2. a worm wheel; 3. a worm; 4. a motor; 5. a front bearing; 6. a rear bearing; 7. a blanking cover; 8. a seal ring; 9. adjusting the sheath; 10. adjusting a screw; 11. a buffer spring; 12. a worm gear chamber; 13. a transmission cavity; 14. bearing position A; 15. bearing position B; 16. a thread adjusting hole; 17. chamfering the surface; 18. and plugging the cover position.
Detailed Description
The speed reduction transmission mechanism of the automobile steering gear with the oil leakage prevention function comprises a shell 1, a worm wheel 2, a worm 3 and a motor 4 (see figure 1 of the specification).
The shell 1 is provided with a worm gear chamber 12; a transmission cavity 13 (see fig. 3 of the specification) is arranged below the worm gear cavity 12, and the worm gear 2 is arranged in the worm gear cavity 12.
One end of the transmission cavity 13 is provided with a bearing position A14; the other end of the transmission cavity 13 is provided with a bearing position B15 (see figure 3 of the specification); the front bearing 5 is arranged in the bearing position A14; the bearing position B15 is internally provided with a rear bearing 6 (see figure 1 of the specification); a worm 3 is arranged below the worm wheel 2 through a front bearing 5 and a rear bearing 6 (see figure 1 of the specification); a motor 4 is arranged on the shell 1 at one end of the worm 3; one end of the motor 4 is connected to the worm 3 (see fig. 1 of the specification).
The outside of worm wheel 2 evenly is provided with multiunit latch, and the outside of worm 3 evenly is provided with the external screw thread with latch assorted, and worm 3 is connected with worm wheel 2 meshing through the mutually supporting of external screw thread and latch, so when motor 4 drives worm 3 rotation, can drive worm wheel 2 synchronous rotation.
A screw thread adjusting hole 16 is arranged on the shell 1 below the bearing position A14, and an adjusting sheath 9 is arranged on the outer side of the front bearing 5; an adjusting screw 10 is connected in the screw thread adjusting hole 16 of the shell 1 at one side of the adjusting sheath 9 in a screw thread way; a buffer spring 11 is arranged between the adjusting screw 10 and the adjusting sheath 9 (see fig. 1 and 2 of the specification); the purpose of setting the adjusting screw 10 and the buffer spring 11 in this way is: so that the adjusting sheath 9 always has the trend of driving the worm 10 to approach the worm wheel 2 under the action of the elastic force of the buffer spring 11, thereby achieving the compensation of the fit clearance between the worm 10 and the worm wheel 2, enabling the worm 10 to be better matched with the worm wheel 2 and avoiding the problem of abnormal noise caused by overlarge clearance. When the speed reduction transmission mechanism runs for a period of time, the purpose of increasing the deformation elasticity of the buffer spring 11 can be achieved by tightening the adjusting screw 10, so that the problem that the compensation effect is weakened due to the attenuation of the elasticity of the buffer spring 11 after the buffer spring 11 runs for a long time is avoided.
A blocking cover position 18 is arranged on the shell 1 at one end of the bearing position A14; the end opening of the blanking cover position 18 is provided with a chamfer surface 17; the shell 1 is provided with a blocking cover 7 (see the attached figures 1 and 2 of the specification) through a blocking cover position 18, and the blocking cover 7 is in a stepped structure; a sealing ring groove (not shown in the drawing of the specification) is arranged at the step of the blanking cover 7; a sealing ring 8 is arranged between a sealing ring groove of the plugging cover 7 and a chamfer surface 17 of a plugging cover position 18 of the shell 1 (see the attached figures 1 and 2 in the specification); a sealing ring 8 (see figures 1 and 4 of the specification) is arranged between the motor 4 and the shell 1; the purpose of assembling the sealing ring 8 between the motor 4 and the housing 1 and the sealing ring 8 between the blanking cover 7 and the housing 1 is to: the fit clearance between the shell 1 and the front part of the blanking cover 7 and the motor 4 is reduced under the fit of the sealing ring 8, so that the influence of shaking caused by long-term work of a steering system product on the fit clearance of the product is avoided; the processing difficulty of the shell 1 is reduced, and the qualification rate of products is improved; the sealing performance is good, and the risk of oil leakage is avoided; can effectively prevent friction sound caused by the grease-free lubrication of the parts after the oil leakage of the parts. In addition, the sealing rings 8 at the two ends of the shell 1 can be matched, rubber parts are additionally matched between parts for buffering, and abnormal abrasion of the blanking cover 7 caused by rotation of the worm 3 driven by the motor 4 during steering is avoided, so that the electric steering gear can reliably operate in the service life.
According to the speed reduction transmission mechanism of the automobile steering gear with the oil leakage prevention function, the structural design that the sealing ring is arranged in the shell, the adjusting sheath and the buffer spring are arranged at the front bearing is adopted, after the design is adopted, the sealing performance of the transmission mechanism is improved, the oil leakage risk is reduced, and the matching clearance between the worm and the worm wheel can be compensated in a mode of operating the adjusting screw, so that the worm and the worm wheel can be matched with each other well, friction sound can be reduced, the risk of abnormal sound is reduced, and the problem that the speed reduction transmission mechanism of the existing automobile steering gear is prone to oil leakage and abnormal sound is solved, so that the speed reduction transmission mechanism is particularly suitable for use requirements of the automobile steering gear.
Claims (4)
1. A speed reduction transmission mechanism of an automobile steering gear with an oil leakage prevention function comprises a shell (1), a worm wheel (2), a worm (3) and a motor (4); the worm wheel (2) is arranged in the shell (1); a worm (3) is arranged below the worm wheel (2) through a front bearing (5) and a rear bearing (6); the worm (3) is meshed with the worm wheel (2); a motor (4) is arranged on the shell (1) at one end of the worm (3); one end of the motor (4) is connected with the worm (3); the method is characterized in that: a sealing ring (8) is arranged between the motor (4) and the shell (1); a blocking cover (7) is fixedly arranged on the shell at the other end of the worm (3); a sealing ring (8) is arranged between the blanking cover (7) and the shell (1); an adjusting sheath (9) is arranged at the outer side of the front bearing (5); an adjusting screw (10) is connected on the shell (1) at one side of the adjusting sheath (9) in a threaded manner; a buffer spring (11) is arranged between the adjusting screw (10) and the adjusting sheath (9).
2. The reduction gear mechanism of an automobile steering gear with an oil leakage prevention function according to claim 1, wherein: the shell (1) is provided with a worm gear chamber (12); a transmission cavity (13) is arranged below the worm gear cavity (12); one end of the transmission cavity (13) is provided with a bearing position A (14); the other end of the transmission cavity (13) is provided with a bearing position B (15); a front bearing (5) is arranged in the bearing position A (14); a rear bearing (6) is arranged in the bearing position B (15); a screw thread adjusting hole (16) is arranged on the shell (1) below the bearing position A (14); an adjusting screw (10) is arranged in the threaded adjusting hole (16).
3. The reduction gear mechanism of an automobile steering gear with an oil leakage prevention function according to claim 2, wherein: a blocking cover position (18) is arranged on the shell (1) at one end of the bearing position A (14); the port of the plugging cover position (18) is provided with a chamfer surface (17); the shell (1) is provided with a blocking cover (7) through a blocking cover position (18).
4. A reduction gear unit of an automobile steering gear with oil leakage prevention function according to claim 3, wherein: the blanking cover (7) is in a stepped structure; a sealing ring groove is arranged at the step of the blanking cover (7); a sealing ring (8) is arranged between a sealing ring groove of the plugging cover (7) and a chamfer surface (17) of a plugging cover position (18) of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321402546.0U CN219989322U (en) | 2023-06-05 | 2023-06-05 | Speed reduction transmission mechanism of automobile steering gear with oil leakage prevention function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321402546.0U CN219989322U (en) | 2023-06-05 | 2023-06-05 | Speed reduction transmission mechanism of automobile steering gear with oil leakage prevention function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219989322U true CN219989322U (en) | 2023-11-10 |
Family
ID=88614114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321402546.0U Active CN219989322U (en) | 2023-06-05 | 2023-06-05 | Speed reduction transmission mechanism of automobile steering gear with oil leakage prevention function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219989322U (en) |
-
2023
- 2023-06-05 CN CN202321402546.0U patent/CN219989322U/en active Active
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