CN112498465A - Can improve festival fork subassembly of tight performance in advance of steering gear jackshaft - Google Patents
Can improve festival fork subassembly of tight performance in advance of steering gear jackshaft Download PDFInfo
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- CN112498465A CN112498465A CN201910872574.0A CN201910872574A CN112498465A CN 112498465 A CN112498465 A CN 112498465A CN 201910872574 A CN201910872574 A CN 201910872574A CN 112498465 A CN112498465 A CN 112498465A
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- yoke
- hole connecting
- bolt
- joint fork
- connecting block
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- 230000007704 transition Effects 0.000 claims abstract description 30
- 230000036316 preload Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/20—Connecting steering column to steering gear
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
Abstract
A can improve the yoke assembly of the intermediate shaft pretension performance of the steering engine, the steering shaft is connected with yoke assembly through the pretension bolt, the yoke assembly is connected with intermediate shaft assembly again; the joint fork assembly comprises a joint fork and a fixed fork, the joint fork is connected with the fixed fork through a bolt, and the torque and the rotating speed of the steering shaft are transmitted to the middle shaft assembly through the joint fork assembly. The joint fork comprises a joint fork pipe column, bolt hole connecting blocks, threaded hole connecting blocks and a transition piece, the through hole end of the joint fork pipe column is matched with a steering shaft, a pre-tightening bolt is screwed in from the bolt hole connecting blocks of the joint fork, the joint fork pipe column is connected with the steering shaft through the screwed hole connecting blocks, the joint fork end of the joint fork pipe column is connected with the intermediate shaft assembly through a bolt, the transition piece is arranged on the joint fork pipe column between the joint fork end and the bolt hole connecting blocks and the threaded hole connecting blocks, the joint fork end and the bolt hole connecting blocks are connected through the transition piece, and the threaded hole connecting blocks. The invention improves the pre-tightening efficiency value, keeps a stable state and ensures that the yoke can bear a large load under the fatigue working condition.
Description
Technical Field
The invention relates to the field of automobile parts, in particular to a joint fork assembly of an automobile steering system, which can improve the pre-tightening performance of a middle shaft of a steering engine.
Background
At present, a universal joint fork is widely used in a transmission device of an automobile steering system, and the universal joint fork can transmit torque and rotating speed from a steering column to a steering machine by matching with the connection between an intermediate shaft of the steering system and a transmission shaft, so that the aim of steering the automobile is fulfilled.
And the intermediate shaft is often connected with the column steering shaft through the intermediate shaft yoke by a pre-tightening bolt. When the bolt is not hard up, can lead to turning to the noise, cause the driving comfort level to feel the decline, thereby in addition, can make the yoke drop when the bolt is not hard up serious and cause to turn to malfunctioning, cause great driving safety accident.
To avoid this, the yoke is often pretensioned by using a stronger bolt (e.g., M10) and applying a larger pretension torque (50Nm or more). However, this approach also brings about another problem: big pretension moment of torsion leads to the festival fork to surrender easily for plastic deformation takes place for the festival fork, and plastic deformation can make the clearance appear between the spline interface under tired operating mode very probably, thereby arouses the bolt once more not hard up, endangers driving safety.
Through the analysis of the situation, the yoke structure in the prior art is found to have the thickness of a threaded hole region of 17mm generally and the thickness of a bolt hole region of 12mm generally, and the finite element analysis method is used for analyzing the 50Nm bolt pre-tightening and fatigue working condition of the yoke, so that the result shows that the surface tensile stress of the bolt hole region is obviously increased, large-area yielding is caused, and the pre-tightening efficiency value is continuously reduced under the fatigue working condition after pre-tightening.
In summary, there is a need for a novel yoke structure that can satisfy the connection transmission requirement and also satisfy the pre-tightening performance, improve the load strength and the part matching performance of the product, and provide important parameters and relevant standards for the development and evaluation of the yoke.
Disclosure of Invention
In order to overcome the defects of mounting of a yoke and a pre-tightening bolt in the prior art, the invention obtains 1/3 bolt force concentrated on the first circle of thread through analysis according to the explanation of thread strength in a mechanical principle design manual, so that the thickness of a threaded hole area is reduced, the threaded hole area and a bolt hole area are adjusted, an excessive area is designed on the basis of maintaining the diameter of an enveloping circle and not increasing the cost of a blank, and finally the yoke assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering machine is obtained.
The invention discloses a joint fork assembly capable of improving the pre-tightening performance of an intermediate shaft of a steering engine, which has the following specific structure:
the utility model provides a can improve and turn to festival fork subassembly of quick-witted jackshaft pretension performance, includes steering spindle and jackshaft subassembly, its characterized in that:
the steering shaft is connected with a yoke assembly through a pre-tightening bolt, and the yoke assembly is connected with the intermediate shaft assembly;
the joint fork assembly comprises a joint fork and a fixed fork, the joint fork is connected with the fixed fork through a bolt, and the torque and the rotating speed of the steering shaft are transmitted to the middle shaft assembly through the joint fork assembly.
The joint fork assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering gear is characterized by comprising a joint fork pipe column, a bolt hole connecting block, a threaded hole connecting block and a transition piece, wherein a through hole end at one end of the joint fork pipe column is matched with a steering shaft, namely the steering shaft is inserted into the through hole end of the joint fork pipe column, a pre-tightening bolt is screwed in from the bolt hole connecting block of the joint fork and then screwed in the threaded hole connecting block to connect the joint fork pipe column with the steering shaft, the other end of the joint fork pipe column is a joint fork end which is connected with the intermediate shaft assembly through a bolt, the transition piece is arranged on the joint fork pipe column between the joint fork end and the bolt hole connecting block as well as the threaded hole connecting block, and the joint fork end is connected with the bolt hole connecting block and the threaded.
The joint fork assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine is characterized in that the thicknesses of the bolt hole connecting block and the threaded hole connecting block are equal and are both 13 mm.
It should be noted that 13mm is a standard universal size that can be modified for a particular model of steering system.
The joint yoke assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine is characterized in that the transition piece is a transition block with an arc-shaped inclined surface, the transition block is arranged on a joint yoke pipe column, the transition block is arranged at two positions and is respectively arranged at a bolt hole connecting block and a threaded hole connecting block, one end of the transition block is connected with the bolt hole connecting block and the threaded hole connecting block, and the other end of the transition block is connected with the bottom of the joint yoke end.
The design aim at here lies in, on the basis of keeping envelope circle diameter and not increasing the blank cost, reduces the regional thickness of screw hole, all adjusts bolt hole connecting block and screw hole connecting block thickness to 13mm to the CAE result of cooperation transition piece under the same operating mode shows, and the tensile stress in the same region obviously reduces, and pretension efficiency value under its tired operating mode has obvious promotion simultaneously, keeps steady state.
The joint fork assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine has the following beneficial effects:
1. the yoke assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine can be used for a tubular column power-assisted steering system, and has the capability of having higher rigidity to quickly respond to steering torque and rotating speed under the condition of higher working load, and the thickness of a threaded hole area is reduced, the threaded hole area and the bolt hole area are adjusted, and a transition area is designed on the basis of keeping the diameter of an enveloping circle and not increasing the cost of a blank;
2. according to the joint yoke assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine, the tensile stress in the same area is obviously reduced, meanwhile, the pre-tightening efficiency value under the fatigue working condition is obviously improved, the stable state is kept, and the joint yoke can bear a large load under the fatigue working condition.
Drawings
FIG. 1 is a schematic structural view of a yoke assembly of the present invention for improving the preload performance of a steering gear intermediate shaft;
FIG. 2 is a schematic diagram of the overall structure of a yoke assembly of the present invention for improving the pre-tightening performance of a middle shaft of a steering gear;
FIG. 3 is a data comparison graph of a yoke assembly of the present invention that improves the pre-tightening performance of a steering gear jackshaft versus a prior art yoke.
In the figure: the steering wheel comprises a steering shaft 1, a middle shaft assembly 2, a pre-tightening bolt 3, a yoke assembly 4, a yoke 5, a fixed yoke 6, a yoke pipe column 5a, a bolt hole connecting block 5b, a threaded hole connecting block 5c, a transition piece 5d, a through hole end 5a1, a yoke end 5a2 and an arc-shaped inclined plane 5d 1.
Detailed Description
The invention will be further described with reference to the drawings and embodiments, wherein the fork assembly can improve the pretensioning performance of the intermediate shaft of the steering gear.
Examples
As shown in fig. 1 and 2, a yoke assembly capable of improving the pre-tightening performance of a middle shaft of a steering gear comprises a steering shaft 1 and a middle shaft assembly 2, wherein the steering shaft is connected with a yoke assembly 4 through a pre-tightening bolt 3, and the yoke assembly is connected with the middle shaft assembly;
the yoke assembly 4 comprises a yoke 5 and a fixed yoke 6, the yoke is connected with the fixed yoke through a bolt, and the torque and the rotating speed of the steering shaft are transmitted to the middle shaft assembly by the yoke assembly.
Yoke 5 includes yoke tubular column 5a, bolt hole connecting block 5b, screw hole connecting block 5c and transition piece 5d, wherein, the through-hole end 5a1 and the steering spindle 1 cooperation of yoke tubular column one end, namely, the steering spindle inserts the through-hole end of yoke tubular column, pretension bolt 3 is from the bolt hole connecting block screw in of yoke, screw in screw hole connecting block is again with yoke tubular column and steering spindle connection, the yoke tubular column other end is yoke end 5a2, this end is connected with jackshaft subassembly 2 through the bolt, and at yoke end and bolt hole connecting block, the transition piece has been seted up on the yoke tubular column between the screw hole connecting block, be connected yoke end and bolt hole connecting block, screw hole connecting block through this transition piece.
The thickness of the bolt hole connecting block 5b is equal to that of the threaded hole connecting block 5c, and the thickness of the bolt hole connecting block and the thickness of the threaded hole connecting block are both 13 mm.
The transition piece 5d is specifically a transition block with an arc-shaped inclined surface 5d1, which is arranged on the yoke pipe column 5a, and the transition block has two positions, and is respectively arranged at the bolt hole connecting block and the threaded hole connecting block, wherein one end of the transition block is connected with the bolt hole connecting block and the threaded hole connecting block, and the other end of the transition block is connected with the bottom of the yoke end 5a 2.
As shown in figure 3, on the basis of keeping the diameter of the enveloping circle and not increasing the cost of the blank, reduce the regional thickness of screw hole, all adjust bolt hole connecting block and screw hole connecting block thickness to 13mm, and the CAE result of cooperation transition piece under the same operating mode shows that the data line of this application compares the tensile stress of prior art's data line in the same region and obviously reduces, and the pretension efficiency value under its tired operating mode has obvious promotion simultaneously, keeps steady state.
The yoke assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine can be used for a tubular column power-assisted steering system, and has the capability of having higher rigidity to quickly respond to steering torque and rotating speed under the condition of higher working load. According to the joint yoke assembly capable of improving the pre-tightening performance of the intermediate shaft of the steering engine, the tensile stress in the same area is obviously reduced, meanwhile, the pre-tightening efficiency value under the fatigue working condition is obviously improved, the stable state is kept, and the joint yoke can bear a large load under the fatigue working condition.
The invention is suitable for the field of the fork assembly for improving the pre-tightening performance of the intermediate shaft of the steering engine of various steering systems.
Claims (4)
1. The utility model provides a can improve and turn to quick-witted jackshaft pretension ability's festival fork subassembly, includes steering spindle (1) and jackshaft subassembly (2), its characterized in that:
the steering shaft (1) is connected with a yoke component (4) through a pretightening bolt (3), and the yoke component is connected with the intermediate shaft component (2);
the joint fork assembly (4) comprises a joint fork (5) and a fixed fork (6), the joint fork is connected with the fixed fork through a bolt, and the torque and the rotating speed of the steering shaft are transmitted to the middle shaft assembly by the joint fork assembly.
2. A yoke assembly for improving the preload performance of an intermediate shaft of a steering gear as claimed in claim 1, wherein said yoke (5) comprises a yoke leg (5a), a bolt hole connecting block (5b), a threaded hole connecting block (5c) and a transition piece (5d), wherein a through hole end (5a1) of one end of the yoke leg is engaged with the steering shaft (1) such that the steering shaft is inserted into the through hole end of the yoke leg, the preload bolt (3) is screwed in from the bolt hole connecting block of the yoke, and the yoke leg is connected to the steering shaft by screwing in the threaded hole connecting block, the other end of the yoke leg is a yoke end (5a2) which is connected to the intermediate shaft assembly (2) by a bolt, and a transition piece is provided on the yoke leg between the yoke end and the bolt hole connecting block and the threaded hole connecting block, through which the yoke end and the bolt hole connecting block are connected to each other, The threaded hole connecting blocks are connected.
3. A yoke assembly for improving the preload of an intermediate shaft of a steering gear as claimed in claim 2, wherein said bolt hole connecting piece (5b) and said threaded hole connecting piece (5c) are equal in thickness and are each 13 mm.
4. A yoke assembly for improving the preload of an intermediate shaft of a steering gear as claimed in claim 2, wherein said transition piece (5d) is embodied as a transition piece with an arc-shaped slope (5d1) provided on the yoke stem (5a), and the transition piece is provided at two positions, respectively, at the bolt hole connecting block and the screw hole connecting block, wherein one end of the transition piece is connected to the bolt hole connecting block and the screw hole connecting block, and the other end of the transition piece is connected to the bottom of the yoke end (5a 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910872574.0A CN112498465A (en) | 2019-09-16 | 2019-09-16 | Can improve festival fork subassembly of tight performance in advance of steering gear jackshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910872574.0A CN112498465A (en) | 2019-09-16 | 2019-09-16 | Can improve festival fork subassembly of tight performance in advance of steering gear jackshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112498465A true CN112498465A (en) | 2021-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910872574.0A Pending CN112498465A (en) | 2019-09-16 | 2019-09-16 | Can improve festival fork subassembly of tight performance in advance of steering gear jackshaft |
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|---|---|
| CN (1) | CN112498465A (en) |
Citations (17)
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| JP2003028187A (en) * | 2001-07-12 | 2003-01-29 | Koyo Seiko Co Ltd | Universal joint yoke |
| JP2007232223A (en) * | 2007-06-21 | 2007-09-13 | Nsk Ltd | Connecting portion of shaft and yoke of universal joint |
| JP2009079677A (en) * | 2007-09-26 | 2009-04-16 | Nsk Ltd | Yoke in steering device and coupling structure for rotary shaft |
| JP2009248130A (en) * | 2008-04-07 | 2009-10-29 | Nsk Ltd | Manufacturing method of yoke for universal joint |
| JP2010190404A (en) * | 2009-02-20 | 2010-09-02 | Nsk Ltd | Universal joint and machining method for the same |
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| DE102013108619A1 (en) * | 2013-08-09 | 2015-02-12 | Zf Lenksysteme Gmbh | Intermediate steering shaft |
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| CN205706836U (en) * | 2016-04-28 | 2016-11-23 | 中国第一汽车股份有限公司 | A kind of have the intermediate shaft of automobile steering column assembly preventing misloading structure |
| US20160369849A1 (en) * | 2014-03-14 | 2016-12-22 | Nsk Ltd. | Torque transmission unit |
| CN106319825A (en) * | 2015-06-25 | 2017-01-11 | 青岛海尔洗衣机有限公司 | A clothes dryer/washing and drying integrated machine control method |
| CN207278723U (en) * | 2017-10-11 | 2018-04-27 | 台州兴隆传动股份有限公司 | A kind of side surface locking is universal to be pitched successively |
| JP2019027540A (en) * | 2017-08-01 | 2019-02-21 | 日本精工株式会社 | Universal joint and steering device including the same |
| CN211076041U (en) * | 2019-09-16 | 2020-07-24 | 博世华域转向系统有限公司 | Can improve festival fork subassembly of steering gear jackshaft pretension performance |
-
2019
- 2019-09-16 CN CN201910872574.0A patent/CN112498465A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028187A (en) * | 2001-07-12 | 2003-01-29 | Koyo Seiko Co Ltd | Universal joint yoke |
| JP2007232223A (en) * | 2007-06-21 | 2007-09-13 | Nsk Ltd | Connecting portion of shaft and yoke of universal joint |
| JP2009079677A (en) * | 2007-09-26 | 2009-04-16 | Nsk Ltd | Yoke in steering device and coupling structure for rotary shaft |
| JP2009248130A (en) * | 2008-04-07 | 2009-10-29 | Nsk Ltd | Manufacturing method of yoke for universal joint |
| JP2010190404A (en) * | 2009-02-20 | 2010-09-02 | Nsk Ltd | Universal joint and machining method for the same |
| KR20110075081A (en) * | 2009-12-28 | 2011-07-06 | 주식회사 만도 | Intermediate shaft of steering apparatus for vehicle and steering apparatus for vehicle using the same |
| JP2011247353A (en) * | 2010-05-27 | 2011-12-08 | Suzuki Motor Corp | Yoke for universal joint and universal joint having the same |
| CN201902470U (en) * | 2011-01-12 | 2011-07-20 | 上海采埃孚转向系统有限公司 | Yoke assembly for automobile steering column |
| JP2012107756A (en) * | 2012-02-20 | 2012-06-07 | Nsk Ltd | Method of machining universal joint |
| DE102013108619A1 (en) * | 2013-08-09 | 2015-02-12 | Zf Lenksysteme Gmbh | Intermediate steering shaft |
| US20160369849A1 (en) * | 2014-03-14 | 2016-12-22 | Nsk Ltd. | Torque transmission unit |
| CN104494686A (en) * | 2014-12-03 | 2015-04-08 | 安徽江淮汽车股份有限公司 | Steering gear assembly and vehicle |
| CN106319825A (en) * | 2015-06-25 | 2017-01-11 | 青岛海尔洗衣机有限公司 | A clothes dryer/washing and drying integrated machine control method |
| CN205706836U (en) * | 2016-04-28 | 2016-11-23 | 中国第一汽车股份有限公司 | A kind of have the intermediate shaft of automobile steering column assembly preventing misloading structure |
| JP2019027540A (en) * | 2017-08-01 | 2019-02-21 | 日本精工株式会社 | Universal joint and steering device including the same |
| CN207278723U (en) * | 2017-10-11 | 2018-04-27 | 台州兴隆传动股份有限公司 | A kind of side surface locking is universal to be pitched successively |
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