WO2022061848A1 - Douille pour ensemble fourche et fourche - Google Patents

Douille pour ensemble fourche et fourche Download PDF

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Publication number
WO2022061848A1
WO2022061848A1 PCT/CN2020/118257 CN2020118257W WO2022061848A1 WO 2022061848 A1 WO2022061848 A1 WO 2022061848A1 CN 2020118257 W CN2020118257 W CN 2020118257W WO 2022061848 A1 WO2022061848 A1 WO 2022061848A1
Authority
WO
WIPO (PCT)
Prior art keywords
bushing
shift fork
fork shaft
shaft
main body
Prior art date
Application number
PCT/CN2020/118257
Other languages
English (en)
Chinese (zh)
Inventor
冯晓崇
Original Assignee
舍弗勒技术股份两合公司
冯晓崇
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 舍弗勒技术股份两合公司, 冯晓崇 filed Critical 舍弗勒技术股份两合公司
Priority to DE112020007640.7T priority Critical patent/DE112020007640T5/de
Priority to CN202080101811.4A priority patent/CN115698555A/zh
Priority to PCT/CN2020/118257 priority patent/WO2022061848A1/fr
Publication of WO2022061848A1 publication Critical patent/WO2022061848A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H2063/3079—Shift rod assembly, e.g. supporting, assembly or manufacturing of shift rails or rods; Special details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • F16H2063/321—Gear shift yokes, e.g. shift forks characterised by the interface between fork body and shift rod, e.g. fixing means, bushes, cams or pins

Definitions

  • the present invention relates to the field of shift forks, and in particular to a bush for a fork shaft and a fork assembly including the bush.
  • a shift fork is often required to effect a shift.
  • Figure 1 shows a possible fork assembly F, which includes a fork shaft FS and a fork FF fixed to the fork shaft FS.
  • the shift fork shaft FS can drive the shift fork FF to reciprocate along the axial direction.
  • Both ends of the fork shaft FS are each provided with a bushing B to support the fork shaft FS.
  • FIG. 2 is an exploded schematic view of FIG. 1 , the cross section of the fork shaft FS is rectangular, and the cross section of the inner peripheral wall of the bushing B is also rectangular.
  • the axial center of the bushing B is provided with a bushing pin hole B0 which penetrates in the radial direction.
  • the shifting fork shaft FS is provided with a shaft pin hole S0. After the bushing B is sleeved on the shifting fork shaft FS, a positioning pin is used. P passes through the bushing pin hole B0 and the shaft pin hole S0 to axially position the bushing B and the fork shaft FS.
  • the bushing B is a plastic part, and the shift fork shaft FS
  • plastic chips and metal chips will be generated. This would lead to, for example, a reduction in cleanliness within the transmission.
  • the purpose of the present invention is to overcome or at least alleviate the above-mentioned deficiencies of the prior art, and to provide a bush for a shift fork with a simple structure and good installation effect, and a shift fork assembly including the bush.
  • a bushing for a shift fork which is sleeved on an end of a shift fork shaft to support the shift fork shaft, wherein the bushing comprises:
  • the body in the form of a tube
  • the positioning part is arranged at the axial end of the main body, and the inner peripheral wall of the positioning part is partially convex radially inward or concave radially outward to form a positioning area, and the positioning area is used for connecting with the
  • the locating ring of the fork shaft is form-fittingly fitted to define the axial position of the bushing on the fork shaft.
  • the positioning portion includes a plurality of elastic claws, the plurality of elastic claws are distributed in a circumferential direction of the main body, and the elastic claws include:
  • the claw head protrudes from the inner peripheral wall of the claw body and is used for extending into the concave positioning ring located on the fork shaft.
  • an axial end of the claw head close to the body forms a claw head guide
  • the positioning portion further includes a plurality of fastening claws, the fastening claws and the elastic clamping claws are spaced apart, and the inner diameter of the cylindrical surface where the inner peripheral wall of the fastening claws is located is equal to or is smaller than the outer diameter of the axial region of the fork shaft in which the bushing is mounted.
  • the inner peripheral wall of the bushing partially protrudes radially inward to form an interference zone, and the inner diameter of the cylinder where the inner peripheral wall of the interference zone is located is smaller than the diameter of the fork shaft for the fork shaft.
  • the interference areas are multiple, and the interference areas are spaced apart in the circumferential direction of the bushing.
  • the interference zone includes a plurality of strip-shaped protrusions extending along the axial direction.
  • the interference region extends from the main body to the positioning portion in the axial direction, and corresponds to the fastening claw in the circumferential direction.
  • a shift fork assembly which includes a shift fork shaft and a bushing sleeved on at least one end portion of the shift fork shaft in the axial direction, wherein the bushing is The bush for a shift fork of the present invention.
  • At least one end of the shift fork shaft forms a bushing mounting portion, the bushing is mounted on the bushing mounting portion, and the positioning ring is recessed in an annular shape at the bushing mounting portion in the form of grooves or annular projections.
  • an outer diameter of the bushing mounting portion is smaller than an outer diameter of a shaft main body of the shift fork shaft located in an axial middle portion, so as to form between the bushing mounting portion and the axle main body a shaft shoulder against which the bushing abuts.
  • the bushing according to the present invention is simple in structure, low in manufacturing cost, and easy to assemble with the shifting fork shaft.
  • the shift fork assembly according to the present invention can realize the axial positioning of the bushing relative to the shift fork shaft without using the positioning pin, and the shrapnel falling off the components is not easily generated during the installation process.
  • Figure 1 is a schematic diagram of one possible fork assembly.
  • FIG. 2 is an exploded schematic view of some components of FIG. 1 .
  • FIG. 3 is a schematic diagram of a shift fork assembly according to one embodiment of the present invention.
  • FIG. 4 is an exploded schematic view of some components of FIG. 3 .
  • FIG. 5 is a schematic diagram of a partial structure of a shift fork shaft of a shift fork assembly according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a bushing of a shift fork assembly according to one embodiment of the present invention.
  • FIGS. 7 to 9 are schematic diagrams of cross-sections of a bushing and a shift fork shaft of a shift fork assembly according to an embodiment of the present invention during assembly.
  • F fork assembly FF fork; FS fork shaft;
  • S1 bushing mounting part S11 locating ring; S12 shoulder; S1a shaft guide; Sm shaft body;
  • A represents the axial direction of the fork assembly, which is consistent with the axial direction of the bushing in the fork assembly
  • R represents the radial direction of the fork assembly, and the radial direction R is consistent with the axial direction of the fork assembly.
  • the shift fork assembly F includes a shift fork shaft FS, a shift fork FF and a bushing B.
  • the shift fork FF is fixed on the shift fork shaft FS and can reciprocate along the axis A along the shift fork shaft FS.
  • the bushing B is sleeved on at least one end of the fork shaft FS (in this embodiment, both ends of the fork shaft FS are sleeved with the bushing B).
  • the bushing B In both the radial direction R and the axial direction A, the bushing B is fixed relative to the shift fork shaft FS, so that the bushing B can follow the shift fork shaft FS to move in the axial direction A and provide support for the shift fork shaft FS.
  • the material of manufacture of the bushing B includes plastic.
  • the middle part of the fork shaft FS in the axial direction A is referred to as the shaft main body Sm.
  • Both ends of the fork shaft FS, which are located on both sides of the shaft body Sm, are formed as bushing mounting portions S1, and the bushings B are sleeved on the outer periphery of the bushing mounting portion S1.
  • the side where the shaft body Sm is located is referred to as the inner side of the fork shaft FS
  • the side where the bushing mounting portion S1 is located is referred to as the outer side of the fork shaft FS.
  • the diameter of the bushing mounting portion S1 is smaller than the diameter of the shaft main body Sm, so that a shoulder S12 is formed at the boundary between the bushing mounting portion S1 and the shaft main body Sm.
  • One end of the bushing B can abut against the shaft shoulder S12 to obtain an axial limit.
  • a positioning ring S11 is formed on the outer periphery of the bushing mounting portion S1.
  • the positioning ring S11 is used to cooperate with the positioning portion 20 located on the bushing B to provide an axial limit for the bushing B.
  • the positioning ring S11 is a concave portion of the peripheral wall of the bushing mounting portion S1, or in other words, the positioning ring S11 is an annular groove. In the axial direction A, the positioning ring S11 is located in a region of the bushing mounting portion S1 near the outer end, but not at the outermost end.
  • the outermost end of the fork shaft FS forms a shaft guide portion S1a, and the outer diameter of the shaft guide portion S1a increases as it goes inward in the axial direction.
  • the shaft guide portion S1a is a chamfered or rounded end of the fork shaft FS. Horn. The provision of the shaft guide portion S1a makes the process of inserting the bushing B into the fork shaft FS more convenient.
  • the bushing B is in the shape of a short tube, which includes a main body 10 and a positioning portion 20 located at the end of the main body 10 .
  • the positioning portion 20 is used to cooperate with the positioning ring S11 located at the bushing installation portion S1 to provide the bushing B on the fork shaft. Axial positioning on FS.
  • the positioning portion 20 can also provide radial positioning for the bushing B. As shown in FIG.
  • the inner circumference of the end of the main body 10 facing the axially inner side of the fork shaft FS is formed with a chamfer 10a to facilitate the assembly of the bushing B and the fork shaft FS.
  • the positioning portion 20 includes a plurality of elastic claws 21 and a plurality of fastening claws 22, and the elastic claws 21 and the fastening claws 22 are arranged at intervals in the circumferential direction, that is, adjacent elastic claws 21 are tightened
  • the fixing claws 22 are spaced apart, and the adjacent fastening claws 22 are spaced apart by the elastic claws 21 .
  • the elastic jaws 21 are mainly used to provide axial positioning for the bushing B.
  • the elastic claw 21 includes a claw body 210 and a claw head 211 .
  • the claw body 210 is in the shape of a strip, which is connected with the main body 10 and extends along the axial direction A. As shown in FIG.
  • the inner diameter of the cylindrical surface on which the inner walls of the plurality of claw bodies 210 in the circumferential direction are located is approximately equal to (or preferably slightly larger than) the outer diameter of the bushing mounting portion S1 .
  • the claw head 211 is located at the end of the claw body 210 away from the main body 10 , and in this embodiment, the claw head 211 protrudes radially inward from the inner peripheral wall of the claw body 210 , or the claw head 211 is radially opposite to the claw body 210 Extend inward.
  • the claw head 211 protrudes into the groove of the positioning ring S11 to provide axial positioning for the bushing B and prevent the bushing B from falling off the fork shaft FS.
  • the end portion of the claw head 211 for facing the axially inner side of the fork shaft FS forms a claw head guide portion 211a.
  • the inner peripheral wall of the claw head 211 extends radially outward of the bush B as it goes inward in the axial direction.
  • the claw head guide portion 211 a is a chamfered or rounded corner of the end of the claw head 211 .
  • the claw body 210 has a smaller wall thickness.
  • the thickness of the claw body 210 in the radial direction R is smaller than the thickness of the main body 10 in the radial direction R, and preferably, the inner peripheral wall of the claw body 210 and the inner peripheral wall of the main body 10 are on the same cylindrical surface, and the claw body 210 The outer diameter is smaller than the outer diameter of the main body 10 .
  • the fastening claw 22 is used to strengthen the structural strength of the bushing B.
  • the inner diameter of the cylindrical surface on which the fastening claw 22 is located is equal to or slightly smaller than the outer diameter of the bushing mounting portion S1.
  • the thickness of the fastening claw 22 in the radial direction R is equal to the thickness of the main body 10 in the radial direction R, and preferably, the inner peripheral wall of the fastening claw 22 and the inner peripheral wall of the main body 10 are on the same cylindrical surface, and the fastening The outer peripheral wall of the claw 22 and the outer peripheral wall of the main body 10 are on the same cylindrical surface.
  • the lengths of the fastening claw 22 and the elastic clamping claw 21 are equal.
  • the inner peripheral wall of the bushing B partially protrudes radially inward to form an interference region Br, and the inner diameter of the cylinder where the inner peripheral wall of the interference region Br is located is smaller than the outer diameter of the bushing mounting portion S1 . So that the bushing B and the bushing mounting part S1 achieve an interference fit at least in the interference area Br.
  • the interference area Br extends from the main body 10 to the positioning portion 20; in the circumferential direction, the interference area Br is located in the area where the fastening claw 22 is located, that is, the inner peripheral wall of the fastening claw 22 is oversized
  • the area Br covers and the interference area Br on the inner circumference of each fastening claw 22 extends all the way along the axial direction A and penetrates the main body 10 , while the circumferential area where the elastic claw 21 is located does not have the interference area Br.
  • Each of the interference regions Br includes, for example, a plurality of strip-shaped protrusions extending along the axial direction A. As shown in FIG.
  • the above-mentioned method of setting the interference zones Br at intervals in the circumferential direction not only ensures the tight fit between the bushing B and the shift fork shaft FS in the radial direction, but also prevents the bushing B from being subjected to too much interference, such as cracking, etc. damage.
  • the bushing B and the axis of the fork shaft FS are centered, and the bushing B is prepared to be put on the fork shaft FS so that the main body 10 faces the fork shaft FS.
  • the bushing B is gradually inserted into the bushing mounting portion S1 until the claw head guide portion 211a of the elastic jaw 21 contacts the shaft guide portion S1a at the end of the bushing mounting portion S1.
  • the positioning ring S11 may also be an annular protrusion located on the peripheral wall of the bushing installation portion S1.
  • the inner peripheral wall of the elastic claw 21 may have a concave portion. The positioning ring S11 can extend into the concave part of the inner circumference of the elastic claw, so as to realize the axial positioning of the bushing B.
  • the bushing B is installed on the fork shaft FS with the elastic pawls 21 facing inwards and the main body 10 facing outwards, so as to avoid interference between the protruding positioning ring S11 and the main body 10 .
  • the bushing B according to the present invention is simple in structure, low in production cost, and easy to assemble with the fork shaft FS.
  • the shift fork assembly according to the present invention can realize the axial positioning of the bushing B relative to the shift fork shaft FS without using the positioning pin, and the installation process is not easy to generate debris from the components.
  • the fastening claw 22 can also be omitted, and the radial positioning between the bushing B and the fork shaft FS can be realized only by the main body 10 and the elastic clamping claw 21 .
  • the outer peripheral wall of the bushing mounting portion S1 and the inner peripheral wall of the bushing B are both cylindrical, this is not required, and in other possible embodiments, the bushing is installed
  • the cross-sections of the portion S1 and the bushing B may not be circular.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

La présente invention concerne une douille pour une fourche, la douille étant emmanchée au niveau d'une partie d'extrémité d'un arbre de fourche (FS pour Fork Shaft) de sorte à supporter l'arbre de fourche (FS). La douille comprend : un corps principal (10), qui est tubulaire ; et une partie de positionnement (20), qui est disposée au niveau d'une partie d'extrémité axiale du corps principal (10), une paroi périphérique interne de la partie de positionnement (20) faisant partiellement saillie vers un côté interne radial ou étant en retrait vers un côté externe radial pour former ainsi une région de positionnement, et la région de positionnement étant utilisée pour s'adapter de manière verrouillée en forme avec une bague de positionnement (S11) située sur l'arbre de fourche (FS) de sorte à définir la position axiale de la douille sur l'arbre de fourche (FS). La présente invention porte en outre sur un ensemble fourche.
PCT/CN2020/118257 2020-09-28 2020-09-28 Douille pour ensemble fourche et fourche WO2022061848A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112020007640.7T DE112020007640T5 (de) 2020-09-28 2020-09-28 Gabelbuchse und Gabelbaugruppe
CN202080101811.4A CN115698555A (zh) 2020-09-28 2020-09-28 拨叉用衬套及拨叉组件
PCT/CN2020/118257 WO2022061848A1 (fr) 2020-09-28 2020-09-28 Douille pour ensemble fourche et fourche

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/118257 WO2022061848A1 (fr) 2020-09-28 2020-09-28 Douille pour ensemble fourche et fourche

Publications (1)

Publication Number Publication Date
WO2022061848A1 true WO2022061848A1 (fr) 2022-03-31

Family

ID=80844876

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/118257 WO2022061848A1 (fr) 2020-09-28 2020-09-28 Douille pour ensemble fourche et fourche

Country Status (3)

Country Link
CN (1) CN115698555A (fr)
DE (1) DE112020007640T5 (fr)
WO (1) WO2022061848A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201787055U (zh) * 2010-08-31 2011-04-06 陈恳 一种耕耘机变速箱的拨叉轴在箱体上的安装结构
CN104343969A (zh) * 2014-10-20 2015-02-11 上海汽车变速器有限公司 用于amt的选换挡操纵机构的限位系统
CN205503967U (zh) * 2016-02-25 2016-08-24 华晨汽车集团控股有限公司 一种汽车变速器拨叉轴衬套结构
CN108691899A (zh) * 2017-04-06 2018-10-23 舍弗勒技术股份两合公司 组合式塑料衬套和包括该组合式塑料衬套的拨叉
CN111637223A (zh) * 2020-06-19 2020-09-08 苏州东风精冲工程有限公司 变速箱拨叉衬套防脱结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201787055U (zh) * 2010-08-31 2011-04-06 陈恳 一种耕耘机变速箱的拨叉轴在箱体上的安装结构
CN104343969A (zh) * 2014-10-20 2015-02-11 上海汽车变速器有限公司 用于amt的选换挡操纵机构的限位系统
CN205503967U (zh) * 2016-02-25 2016-08-24 华晨汽车集团控股有限公司 一种汽车变速器拨叉轴衬套结构
CN108691899A (zh) * 2017-04-06 2018-10-23 舍弗勒技术股份两合公司 组合式塑料衬套和包括该组合式塑料衬套的拨叉
CN111637223A (zh) * 2020-06-19 2020-09-08 苏州东风精冲工程有限公司 变速箱拨叉衬套防脱结构

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Publication number Publication date
DE112020007640T5 (de) 2023-08-24
CN115698555A (zh) 2023-02-03

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