Method for mounting a bush around a part of a shaft by means of a tight fitting
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02K-001/27
H01F-041/02
A46B-005/00
B23P-011/00
B23P-019/02
F16C-023/00
F16C-033/04
F16C-033/08
F16C-035/063
H02K-015/03
F16D-001/08
H02K-007/00
출원번호
US-0150280
(2014-01-08)
등록번호
US-9332825
(2016-05-10)
우선권정보
BE-2008/0329 (2008-06-13)
발명자
/ 주소
Pulnikov, Aleksandr
출원인 / 주소
ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
대리인 / 주소
Bacon & Thomas, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
14
초록▼
A method for mounting a bush round a part (2) of a shaft with a force fit, which method comprises the following steps: providing a guide element (7, 23) with an outer surface (8) which is at least partly conical; providing the guide element (7, 23) in the extension of the aforesaid part (2) of the s
A method for mounting a bush round a part (2) of a shaft with a force fit, which method comprises the following steps: providing a guide element (7, 23) with an outer surface (8) which is at least partly conical; providing the guide element (7, 23) in the extension of the aforesaid part (2) of the shaft (1); pushing the bush (5) over the guide element (7, 23) on the part (2) of the shaft (1).
대표청구항▼
1. A method for mounting a bush around a part of a shaft with a force fit, comprising the steps: providing a bush with different layers of composite, which either are or are not fibre-reinforced, wherein the layers which are located near an outer perimeter of the bush have a greater elasticity than
1. A method for mounting a bush around a part of a shaft with a force fit, comprising the steps: providing a bush with different layers of composite, which either are or are not fibre-reinforced, wherein the layers which are located near an outer perimeter of the bush have a greater elasticity than the layers located near an inner wall of the bush;providing a guide element on an extension of said part of the shaft, said guide element having an outer surface which is at least partly conical and whose largest diameter deviates maximally five percent from an outer diameter of said part of the shaft;positioning the guide element such that the largest diameter of the conical part is directed to said part of the shaft;pushing the bush over the guide element, on the side of the guide element with the smallest diameter, and to said part of the shaft;moving a press axially towards the conical part during a first step in sliding the bush over the guide element, wherein the press is provided with a bearing face on which an entire end face of the bush rests during the pressing; and,using a press element with an inner diameter which is equal to or larger than the outer diameter of said part of the shaft during another step in sliding the bush over the guide element so that the bush is mounted around the shaft with a force fit,wherein the press is moved until the bearing face of the press engages a stop on the guide element. 2. The method according to claim 1, wherein, during the said first step to axially slide the bush over the guide element, axially moving the press up to the conical part of the guide element. 3. The method according to claim 1, wherein the smallest diameter of the conical part is smaller than or just as large as the inner diameter of the bush; and wherein, the outer surface of the guide element of the bush has an initial contact surface between the bush and the guide element that has a rounded edge, said initial contact surface being configured to contact the bush when the bush is initially fitted over the guide element. 4. The method according to claim 3, wherein the radius of the rounded edge is located within a range of 10−10 times the smallest diameter of the conical part to 10−1 times the smallest diameter of the conical part. 5. The method according to claim 1, wherein the bush is made of a plastic. 6. The method according to claim 1, wherein the bush has an axis, and including making the bush of a fibre-reinforced composite with at least one of the following layers or a combination thereof: an inner layer whose fibres are wound in a direction extending between +/−70° and 90° in relation to the axis of the bush;an intermediate layer whose fibres are wound in a direction extending according to a direction between +/−70° and 90° in relation to the shaft;an axial layer whose fibres are wound in a direction extending according to a direction between 0 and +/−70° in relation to the shaft; and, an outer layer whose fibres are wound in a direction extending between +/−70° and 90° in relation to the shaft. 7. The method according to claim 6, wherein the inner layer is made with carbon fibre. 8. The method according to claim 1, wherein an apical angle (α) of the conical part of the guide element is selected to be smaller than or as large as a, and wherein: α=k·|ε|·D4/(h·(D1−D4)) where: α=the maximal apical angle of the conical part in °;k=a factor which is selected on the basis of the way in which the bush is made and the material out of which the bush is made, which factor is within a range of 10−6 to 10−2;|ε|=the absolute value of the maximally possible elongation for the least elastic material component of the bush or the plasticity limit of the metal of the shaft if the shaft is made of metal;h=the thickness of the wall of the bush in m;D4=the inner diameter of the bush in m; andD1=the outer diameter of the part of the shaft in m. 9. The method according to claim 8, wherein the guide element comprises a number of successive conical parts over its longitudinal direction, wherein every conical part meets the formula of claim 8, whereby D1 is each time determined by the largest outer diameter of the conical part. 10. The method according to claim 1, wherein the shaft is stepped and the guide element is at least partly hollow, including centering the guide element on the shaft by providing it with its hollow part over a shaft part with a smaller diameter than the part of the shaft over which the bush is to be received. 11. The method according to claim 1, wherein the shaft is provided with a recess at a far end thereof and the guide element is provided with an axially protruding part which is complementary to the recess in the shaft, wherein the guide element is centred on the shaft by introducing it at least partly in the recess of the shaft with its axially protruding part. 12. The method according to claim 1, wherein the outer surface of the guide element is provided with a cylindrical part which connects to the conical part, on the side of this conical part with the smallest diameter. 13. The method according to claim 12, wherein the outer diameter of the cylindrical part of the guide element is smaller than or equal to the smallest diameter of the conical part. 14. The method according to claim 1, wherein, in order to push the bush over the guide element and on the part of the shaft, using a cylindrical press which is at least partly hollow. 15. The method according to claim 14, wherein the hollow press is provided with a recess having an inner diameter which corresponds practically to the diameter of the cylindrical part of the guide element, wherein the hollow press is moved over the cylindrical part of the guide element during the axial movement. 16. The method according to claim 14, wherein the hollow press is provided with an overhang which rests against an end face of the bush during the first step to facilitate axially shifting the bush over the guide element. 17. The method according to claim 16, wherein, in a following step, a second press is first provided between the press and the guide element, wherein the second press has a recess with an inner diameter which is larger than the inner diameter of the bush before the bush is fitted over the shaft. 18. The method according to claim 16, wherein several successive steps are used when axially sliding the bush over the guide element, wherein at least a second press with an ever increasing inner diameter is used in every subsequent step. 19. The method according to claim 1, wherein the guide element is an integral part of the shaft. 20. The method according to claim 1, wherein the part of the shaft on which the bush is to be mounted with a force fit has a cylindrical shape. 21. A method for mounting a bush around a part of a shaft with a force fit, comprising the steps: providing a bush with different layers of composite, which either are or are not fibre-reinforced, wherein the layers which are located near an outer perimeter of the bush have a greater elasticity than the layers located near an inner wall of the bush;providing a guide element on an extension of said part of the shaft, said guide element having an outer surface which is at least partly conical and whose largest diameter deviates maximally five percent from an outer diameter of said part of the shaft;positioning the guide element such that the largest diameter of the conical part is directed to said part of the shaft;pushing the bush over the guide element, on the side of the guide element with the smallest diameter, and to said part of the shaft;moving a press axially towards the conical part during a first step in sliding the bush over the guide element, wherein the press is provided with a bearing face on which an entire end face of the bush rests during the pressing; and,using a press element with an inner diameter which is equal to or larger than the outer diameter of said part of the shaft during another step in sliding the bush over the guide element so that the bush is mounted around the shaft with a force fit,wherein an apical angle (α) of the conical part of the guide element is selected to be smaller than or as large as α, and wherein: α=k·|ε|·D4/(h·(DI−D4)) where: α=the maximal apical angle of the conical part in °;k=a factor which is selected on the basis of the way in which the bush is made and the material out of which the bush is made, which factor is within a range of 10−6 to 10−2;|ε|=the absolute value of the maximally possible elongation for the least elastic material component of the bush or the plasticity limit of the metal of the shaft if the shaft is made of metal;h=the thickness of the wall of the bush in m;D4=the inner diameter of the bush in m; andD1=the outer diameter of the part of the shaft in m.
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