CN210364029U - Recirculating ball conduit and recirculating ball type automobile electric power steering device - Google Patents
Recirculating ball conduit and recirculating ball type automobile electric power steering device Download PDFInfo
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- CN210364029U CN210364029U CN201920384547.4U CN201920384547U CN210364029U CN 210364029 U CN210364029 U CN 210364029U CN 201920384547 U CN201920384547 U CN 201920384547U CN 210364029 U CN210364029 U CN 210364029U
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- 230000003134 recirculating effect Effects 0.000 title claims abstract description 61
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 18
- 238000000034 method Methods 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model relates to a recirculating ball turns to the device field, the utility model discloses recirculating ball pipe and recirculating ball formula car electric power assisted steering device, the recirculating ball pipe, the inner space of pipe (1) is as outer raceway (2) of recirculating ball, the one end of pipe (1) is entry end (3) of recirculating ball, one end is exit end (4) of recirculating ball, pipe (1) is through entry end (3), exit end (4) are connected with the interior raceway of steering nut (5), entry end (3) of pipe central line (35), exit end (4) correspond and are tangent with interior raceway central line (34) of being connected. The guide pipe is matched with the steering nut, so that the circulating ball rolling effect is good, the requirement of high-speed running of the circulating ball can be met, and the impact on the inner wall of the guide pipe can be avoided.
Description
Technical Field
The utility model relates to a circulation ball turns to the field, has especially related to circulation ball pipe and circulation ball turns to device.
Background
The non-independent suspension commercial vehicle continuously adopts a recirculating ball type electric power steering device, the recirculating ball type automobile electric power steering device is called X-EPS for short, the device drives a first-stage worm gear and worm to drive through a motor, a second-stage recirculating ball screw to drive, and a third-stage gear and rack to drive. Because the circulating ball screw is required to transmit large torque and the rigidity of the circulating ball screw needs to be enhanced, an external circulating flow guide mode is adopted. The central line of traditional outer circulation pipe and the central line of interior raceway adopt crossing mode, and the recirculating ball can cause the injury to the inner wall of pipe at the rolling in-process, simultaneously because recirculating ball formula electric power steering device's ball rotational speed is higher, compares in traditional 1 ~ 1.5r/s, and the rotational speed of electric power steering device ball is up to 2r/s, so the steel ball needs more light roll, and the resistance requirement to the raceway is higher. Chinese patent CN2709275Y discloses a recirculating ball type steering gear, which is a traditional steering gear on the market, and the conduit of the patent cannot meet the requirements of an electric steering device of a recirculating ball type automobile.
SUMMERY OF THE UTILITY MODEL
The utility model discloses transition is steady inadequately between outside pipe and the interior raceway among the prior art, and the recirculating ball is great to the impact force of pipe, can not satisfy defects such as the higher rotational speed requirement of recirculating ball. A recirculating ball guide pipe and a recirculating ball steering apparatus are provided.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
the circulating ball guide pipe comprises a guide pipe, the inner space of the guide pipe is used as an outer raceway of a circulating ball, one end of the guide pipe is an inlet end of the circulating ball, the other end of the guide pipe is an outlet end of the circulating ball, the guide pipe is connected with an inner raceway of a steering nut through the inlet end and the outlet end, and the inlet end and the outlet end of a center line of the guide pipe are correspondingly tangent to the center line of the connected inner raceway. The circulating ball guide pipe is assembled in a mode of being tangent to the central line of the inner raceway, so that the phenomenon of clamping stagnation of the circulating ball is reduced, the circulating ball is ensured to be more stable in transition between the inner raceway and the outer guide pipe, the impact on the inner wall of the guide pipe is reduced, and the service life of the guide pipe is prolonged.
Preferably, the inlet end and/or the outlet end of the conduit is notched to form a stop tongue. The baffle tongue can ensure that the circulating ball is limited, the circulating ball is prevented from being separated from the raceway, and meanwhile, the structure of the baffle tongue needs to ensure that the interference on the rotation of the screw rod is not caused.
Preferably, the duct is a U-shaped duct, and the stop tongue is positioned on the inner side of the duct.
Preferably, the blocking tongue is arranged obliquely outwards relative to the outer raceway, and the inclination angle of the blocking tongue to the vertical direction is 1-5 degrees. The baffle tongue adopts the mode of leaning out the design to arrange to can guarantee that the recirculating ball is at the in-process that gets into the pipe, keep off the effect that the tongue can not play the hindrance to the recirculating ball, thereby guarantee the entering pipe that the recirculating ball can be smooth, the recirculating ball also can not break away from out simultaneously, can satisfy the higher rotational speed requirement of recirculating ball.
Preferably, pressure relief seams are arranged between the two sides of the baffle tongue and the wall of the conduit. The advantage of the pressure relief seam is that on the one hand the blocking tongue is able to relieve a part of the pressure when the recirculating ball impacts on the blocking tongue during high-speed rolling. Meanwhile, the blocking tongue needs to be arranged, and the blocking tongue needs a certain inclination angle, so that the pressure relief seam is arranged for design convenience, and the blocking tongue can be better inclined.
Preferably, the U-shaped conduit comprises an inlet section, an outlet section and a connecting section connecting the inlet section and the outlet section, and the baffle tongue is positioned on the inner side of the inlet section and/or positioned on the inner side of the outlet section.
Preferably, the duct is formed by combining a front half duct and a rear half duct, and the front half duct and the rear half duct are half-tubular metal pieces which are symmetrically arranged and separated along the central line of the duct. The mode that adopts half pipe and half pipe concatenation before designs its advantage lies in, and the design is simple, and the whole orbit of assurance pipe that can be higher satisfies the requirement of different complicacies and precision. Compared with the whole tube processing, the processing cost is lower, and the processing process is easier to control.
The application also discloses a circulation ball turns to device, and the circulation ball device has configured the outer pipe of circulation ball to can guarantee that whole raceway more passes through smoothly, guarantee that the circulation ball can not appear the jamming at the rolling in-process in the raceway, the circulation ball can not produce the impact to the pipe at rolling in-process moreover, thereby guaranteed the life of circulation ball and pipe.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect: at first this patent creatively adopts the tangent mode of the central line of outside pipe and inside raceway central line to design the raceway, thereby guaranteed the steady roll of recirculating ball in inner raceway and outside pipe, can not produce the jamming phenomenon, can not bump the inner wall of pipe, the life of pipe has been prolonged, and the rotation process is more smooth, the noise is littleer, can satisfy the high-speed rotation of recirculating ball simultaneously, and traditional fluid pressure type recirculating ball turns to device and utilizes the piston transmission effort, recirculating ball and recirculating ball nut do not basically bear the load, so it is lower to the rolling effect and the precision of recirculating ball. However, in the recirculating ball type electric power steering system, the recirculating ball type automobile electric power steering device bears a part of torque, and the rotating speed is high, so that the requirement on the rolling of the recirculating ball is high, and the conduit disclosed by the patent can meet the requirement. Meanwhile, in order to better ensure that the circulating ball enters and rolls out of the guide pipe more smoothly and cannot be blocked, the scheme designs the structure of the baffle tongue, adopts an inclined mode to design the baffle tongue to ensure that the baffle tongue plays a guiding role and cannot play an interference role on the circulating ball, and the pressure relief seam can facilitate the processing of the baffle tongue and simultaneously can remove the impact of the circulating ball on the baffle tongue.
Drawings
Fig. 1 is a schematic view of the overall structure of a catheter.
Fig. 2 is a schematic view of the structure of the rear half duct.
Fig. 3 is a schematic structural view of the steering device.
Fig. 4 is a left side view of fig. 3, with a half-section schematic of the recirculating ball conduit.
FIG. 5 is a schematic view of the engagement of the recirculating ball conduit and the steering nut.
Reference numerals in the drawings correspond to technical names: the pressure relief device comprises a guide pipe 1, an outer roller path 2, an inlet end 3, an outlet end 4, a steering nut 5, a baffle tongue 6, a pressure relief seam 7, an inlet section 8, an outlet section 9, a connecting section 10, a front half guide pipe 11, a rear half guide pipe 12, a strip seam 13, a notch 14 and an inner cavity 15.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, the present embodiment discloses a recirculating ball external conduit for a recirculating ball type electric power steering apparatus of an automobile, in which the recirculating ball external conduit 1 is used in cooperation with a steering nut 5. The inner space of the guide pipe 1 is used as an outer raceway 2 of a circulating ball, one end of the guide pipe 1 is an inlet end 3 of the circulating ball, the other end of the guide pipe 1 is an outlet end 4 of the circulating ball, the guide pipe 1 is connected with an inner raceway of a steering nut 5 through the inlet end 3 and the outlet end 4, and the inlet end 3 and the outlet end 4 of a center line 35 of the guide pipe are correspondingly tangent to a center line 34 of the connected inner raceway. The steering nut 5 is used in cooperation with the screw rod 31, a raceway for rolling the circulating ball is arranged in the steering nut 5 and is defined as an inner raceway, the inner raceway and the outer guide pipe 1 form the raceway for rolling the circulating ball, and the whole raceway is spiral. It is clear that the number of ducts 1 corresponds to the number of turns of the helical raceway, i.e. each turn of the raceway comprises an inner raceway in the steering nut 5 and an outer raceway 2 in the ducts 1. The inlet end 3 and the outlet end 4 of the central line 35 of the conduit are tangent to the central line 34 of the connected inner raceway, which means that the joint of the central line of the inner raceway and the central line of the outer raceway 2 is tangent to transition, thereby ensuring the stable transition of the circulating ball when the inner raceway and the outer raceway 2 are transited, ensuring the passing track of the ball center of the circulating ball in the rolling process to be coincident with the central lines of the inner raceway and the outer raceway 2, and preventing the circulating ball from being stuck.
By adopting the mode, large torque can be transmitted, and the tangent mode has the advantages that each circle of the circulating ball moving along the raceway is very smooth, and the resistance is small, so that a foundation is provided for the quick rotation of the circulating ball.
In order to ensure that the circulating ball enters and rolls out of the guide pipe 1 better, the inlet end 3 and the outlet end 4 of the guide pipe 1 are provided with notches 14 to form a baffle tongue 6, the shape of the lower end of the baffle tongue 6 is designed according to the specific structure of an inner raceway, and the shape of the baffle tongue is required to be incapable of interfering with the screw rod 31 and influencing the normal rotation of the screw rod 31. The baffle tongue 6 has the advantages that when the circulating balls enter the guide pipe 1 along the inner raceway, the baffle tongue 6 has a limiting effect, the circulating balls are prevented from shaking in the process of entering the raceway, each circulating ball is guaranteed to be quite stable when entering the raceway, and the stability of the overall movement of the circulating balls is guaranteed.
For the convenience of installation, the conduit 1 is a U-shaped conduit 1, so the central line of the conduit 1 is also U-shaped, and the baffle tongue 6 is positioned at the inner side of the conduit 1. The baffle tongue 6 deviates from the central line of the outer raceway 2 and is outwards inclined, and the inclination angle of the baffle tongue 6 with the vertical direction is 1 degree. Keep off tongue 6 and can guarantee that the recirculating ball is at the in-process that gets into pipe 1 by the design that leans out, keep off tongue 6 and can not lead to the fact the interference to the entering of recirculating ball, avoid arousing the jamming, this is because the design of the exit end 4 of keeping off tongue 6 pipe 1 is the same with the original purpose of the design of entering the end to make the recirculating ball can not appear interfering with keeping off tongue 6 entering and flowing out the in-process, guaranteed the rolling smooth and easy nature of recirculating ball. And simultaneously, the motion resistance of the circulating ball is reduced.
In order to match the inclined design of the blocking tongue 6, pressure relief seams 7 are arranged between the two sides of the blocking tongue 6 and the wall of the conduit 1. The relief seam 7 facilitates the oblique design of the blocking tongue 6, since the blocking tongue 6 is bent to be oblique during the machining process, and the provided relief seam 7 provides a machining space for designing the blocking tongue 6 to be oblique. At the same time, the pressure relief seam 7 makes a buffer space for movement exist between the baffle tongue 6 and the wall of the conduit 1, so that a part of the acting force of the circulating ball on the baffle tongue 6 can be removed.
For the convenience of processing, the duct 1 of the present embodiment is formed by combining two ducts 1. That is, the duct 1 includes a front half duct 11 and a rear half duct 12, the front half duct 11 and the rear half duct 12 are symmetrically disposed half-tubular metal members separated from the duct 1 along a duct center line 35, and the front half duct 11 and the rear half duct 12 are U-shaped. The inlet end 3 and the outlet end 4 of the conduit 1 are both provided with a baffle tongue 6, the baffle tongue 6 of the inlet end 3 is arranged on the inner side of the front half conduit 11, the baffle tongue 6 of the outlet end 4 is arranged on the inner side of the rear half conduit 12, and the inner side is a U-shaped area 30 enclosed by the conduit 1.
In order to prevent the influence on the movement of the circulating ball and the interference on the rotation of the screw rod 31 caused by the blocking tongue 6, the pressure relief seams 7 on the two sides of the blocking tongue 6 are strip seams 13, the other strip seam is in a shape of a notch 14, the lower end of the blocking tongue 6 is a side line which is a curve, and the specific curve shape is determined by the sizes of the circulating ball, the inner raceway, the screw rod 31 and the like.
The inlet end 3 and the outlet end 4 of this embodiment are for convenience of description, and both ends can be used as an inlet and an outlet of the circulating ball.
Example 2
The present embodiment is different from embodiment 1 in that the inclination angle of the blocking tongue 6 from the vertical direction is 2 degrees.
Example 3
The present embodiment is different from embodiment 1 in that the inclination angle of the blocking tongue 6 from the vertical direction is 3 degrees.
Example 4
The present embodiment is different from embodiment 1 in that the inclination angle of the blocking tongue 6 from the vertical direction is 5 degrees.
Example 5
Compared with the embodiments 1-4, the present embodiment is different in that the conduit is used in a conventional recirculating ball-type power steering apparatus.
Example 6
As shown in fig. 1 to 5, the recirculating ball type electric power steering apparatus for an automobile includes a steering nut 5 and a screw rod 31 transversely assembled in the steering nut 5, and further includes any recirculating ball guiding pipe 1 of embodiments 1 to 4, an inner cavity 15 is provided in the steering nut 5, the inner cavity 15 and a rolling groove of the screw rod 31 form an inner raceway, the inner raceway and an outer recirculating ball guiding pipe 1 are sequentially connected to form a spiral recirculating ball raceway, and an inlet end 3 and an outlet end 4 of a center line of the recirculating ball guiding pipe 1 are respectively tangent to a center line of the connected inner raceway. The guide tube 1 is fixed on the steering nut 5 through a pressure plate 32, and the pressure plate 32 and the steering nut 5 are fixed through bolts.
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The inner space of circulating ball pipe, pipe (1) is as outer raceway (2) of circulating ball, and the one end of pipe (1) is entry end (3) of circulating ball, and one end is exit end (4) of circulating ball, and pipe (1) is connected its characterized in that through entry end (3), exit end (4) and the interior raceway of turning to nut (5): the inlet end (3) and the outlet end (4) of the central line (35) of the conduit are correspondingly tangent with the central line (34) of the connected inner raceway.
2. The recirculating ball conduit of claim 1 wherein: the inlet end (3) and/or the outlet end (4) of the conduit (1) are/is provided with a notch to form a baffle tongue (6).
3. The recirculating ball catheter (1) according to claim 2, wherein: the guide pipe (1) is a U-shaped guide pipe (1) as a whole, and the baffle tongue (6) is positioned on the inner side of the guide pipe (1).
4. The recirculating ball conduit of claim 2 wherein: the baffle tongue (6) is arranged on the inner side of the guide pipe (1), the baffle tongue (6) deviates from the central line of the outer raceway (2) and is inclined outwards, and the inclination angle of the baffle tongue (6) and the vertical direction is 1-5 degrees.
5. The recirculating ball conduit of any one of claims 2-4, wherein: a pressure relief seam (7) is arranged between the two sides of the baffle tongue (6) and the wall of the conduit (1).
6. The recirculating ball conduit of claim 5 wherein: the pressure relief seams (7) on the two sides of the retaining tongue (6) are different in shape, and specifically, one side is a strip seam (13), and the other side is a notch (14).
7. The recirculating ball conduit of claim 2 wherein: the U-shaped conduit (1) comprises an inlet section (8), an outlet section (9) and a connecting section (10) for connecting the inlet section (8) and the outlet section (9), and the baffle tongue (6) is positioned on the inner side of the inlet section (8) and/or on the inner side of the outlet section (9).
8. The recirculating ball conduit of claim 2 wherein: the catheter (1) is formed by combining a front half catheter (11) and a back half catheter (12), wherein the front half catheter (11) and the back half catheter (12) are semi-tubular metal pieces which are symmetrically arranged and are separated from the catheter (1) along a catheter center line (35).
9. The recirculating ball conduit of claim 8 wherein: the inlet end (3) and the outlet end (4) of the conduit (1) are both provided with a baffle tongue (6), the baffle tongue (6) of the inlet end (3) is arranged on the inner side of the front half conduit (11), and the baffle tongue (6) of the outlet end (4) is arranged on the inner side of the rear half conduit (12).
10. The electric power-assisted steering device of the recirculating ball type automobile comprises a steering nut (5) and a screw rod (31) transversely assembled in the steering nut (5), and is characterized in that: the circulating ball guide pipe (1) as claimed in any one of claims 1 to 9 is further included, an inner cavity (15) is arranged in the steering nut (5), the inner cavity (15) and a rolling groove of the screw rod (31) form an inner raceway, the inner raceway and the outer circulating ball guide pipe (1) are sequentially connected to form a spiral circulating ball raceway, and an inlet end (3) and an outlet end (4) of the center line of the circulating ball guide pipe (1) are respectively tangent to the center line of the connected inner raceway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384547.4U CN210364029U (en) | 2019-03-25 | 2019-03-25 | Recirculating ball conduit and recirculating ball type automobile electric power steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384547.4U CN210364029U (en) | 2019-03-25 | 2019-03-25 | Recirculating ball conduit and recirculating ball type automobile electric power steering device |
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| Publication Number | Publication Date |
|---|---|
| CN210364029U true CN210364029U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920384547.4U Active CN210364029U (en) | 2019-03-25 | 2019-03-25 | Recirculating ball conduit and recirculating ball type automobile electric power steering device |
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| CN (1) | CN210364029U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443002A (en) * | 2021-06-04 | 2021-09-28 | 浙江万安泵业有限公司 | Electric power steering device of commercial vehicle |
| CN114454033A (en) * | 2022-04-11 | 2022-05-10 | 天津德科智控股份有限公司 | Ball guide pipe and machining device |
-
2019
- 2019-03-25 CN CN201920384547.4U patent/CN210364029U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443002A (en) * | 2021-06-04 | 2021-09-28 | 浙江万安泵业有限公司 | Electric power steering device of commercial vehicle |
| CN114454033A (en) * | 2022-04-11 | 2022-05-10 | 天津德科智控股份有限公司 | Ball guide pipe and machining device |
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| CP03 | Change of name, title or address |
Address after: No. 1 Junlian Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province, 311835 Patentee after: Zhejiang Wan'an Zhiqu Automotive Electronic Technology Co.,Ltd. Country or region after: China Address before: 311835 Wan'an Science and Technology Park, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG VIE PUMP-MANU Co.,Ltd. Country or region before: China |