KR101744705B1 - Hybrid Propeller Shaft and Method for Manufacturing Thereof - Google Patents

Hybrid Propeller Shaft and Method for Manufacturing Thereof Download PDF

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Publication number
KR101744705B1
KR101744705B1 KR1020150129518A KR20150129518A KR101744705B1 KR 101744705 B1 KR101744705 B1 KR 101744705B1 KR 1020150129518 A KR1020150129518 A KR 1020150129518A KR 20150129518 A KR20150129518 A KR 20150129518A KR 101744705 B1 KR101744705 B1 KR 101744705B1
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KR
South Korea
Prior art keywords
aluminum alloy
alloy pipe
composite material
reinforced composite
fiber
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KR1020150129518A
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Korean (ko)
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KR20170031926A (en
Inventor
이대길
이동영
오승진
남수현
김민국
최재헌
최일범
임준우
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한국과학기술원
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    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/026—Shafts made of fibre reinforced resin
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/20—Alloys based on aluminium
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/06—Drive shafts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

A hybrid propeller shaft and a method of manufacturing the same include an aluminum alloy pipe coupled to a rotating shaft that transmits engine power; Reinforced composite material reinforced with carbon fibers having high rigidity on the inner peripheral surface of the aluminum alloy pipe is formed to be shorter than the length of the aluminum alloy pipe to increase the natural frequency and improve the productivity by facilitating the production.

Description

Technical Field [0001] The present invention relates to a hybrid propeller shaft and a manufacturing method thereof,

The present invention relates to a propeller shaft, and more particularly, to a propeller shaft in which a fiber reinforced composite material reinforced with carbon fibers having high rigidity is formed on the inner circumferential surface of an aluminum alloy pipe coupled to a rotating shaft of an automobile wheel for transmitting engine power of an automobile, To improve the productivity by facilitating the production of the propeller shaft, and a method of manufacturing the hybrid propeller shaft.

Generally, the propeller shaft is used to transmit the power of the engine in a rear-wheel drive vehicle between a transmission and a drive shaft and in a rear-wheel drive vehicle such as a four-wheel drive vehicle or a light truck by transmitting the output of the transmission to the drive shaft.

Since the conventional steel propeller shaft has a limitation on the specific stiffness of the metal itself, it is made of two shafts to increase the natural frequency in order to prevent noise and damage due to resonance in the bending direction.

However, when manufacturing the propeller shafts in two axes, it is inevitable that the weight and cost are increased due to the yoke (York) for connecting the two shafts, the center support bearing and the rubber for vibration damping.

In addition, propeller shafts require much effort and cost to control the noise and vibration generated at the connection site. In comparison, when a propeller shaft is manufactured from a high-rigidity composite material such as a carbon fiber composite material, the propeller shaft can be manufactured in one shaft due to its high non-rigidity.

Propeller shafts made of these high rigidity composite materials do not require the parts needed for the two shafts, resulting in weight reduction and cost savings. However, propeller shafts made of high-rigidity composite materials are unfavorable to external shocks, unlike metals, and have a difficulty in commercialization of composite propeller shafts due to high production costs compared to conventional steel.

In order to solve the above problems, the present invention provides a method of manufacturing a fiber-reinforced composite material reinforced with carbon fibers having a high rigidity on the inner circumferential surface of an aluminum alloy pipe coupled to a rotation axis of an automobile wheel for transmitting engine power of a vehicle, And to provide a hybrid propeller shaft and a method of manufacturing the hybrid propeller shaft.

According to an aspect of the present invention, there is provided a hybrid propeller shaft,

An aluminum alloy pipe coupled to a rotating shaft that transmits engine power; And

Reinforced composite material reinforced with carbon fibers formed on the inner peripheral surface of the aluminum alloy pipe, wherein the fiber reinforced composite material is formed to be shorter than the length of the aluminum alloy pipe.

In the hybrid propeller shaft according to the present invention,

An aluminum alloy pipe coupled to a rotating shaft that transmits engine power; And

And a fiber reinforced composite material reinforced with carbon fibers formed on the inner circumferential surface of the aluminum alloy pipe, wherein the fiber reinforced composite material is divided into several parts at a predetermined distance from the inner peripheral surface of the aluminum alloy pipe.

In the hybrid propeller shaft according to the present invention,

An aluminum alloy pipe coupled to a rotating shaft that transmits engine power; And

And a fiber-reinforced composite material reinforced with carbon fibers formed on the entire area of the inner peripheral surface of the aluminum alloy pipe.

A method of manufacturing a hybrid propeller shaft,

Winding a fiber-reinforced composite material reinforced with carbon fibers on an outer peripheral surface of a Mendrel;

Inserting a fiber reinforced composite material wound around a mandrel into an aluminum alloy pipe coupled to a rotating shaft for transmitting engine power; And

And forming a fiber-reinforced composite material on the inner circumferential surface of the aluminum alloy pipe while rotating the mandrels.

According to the present invention, the fiber reinforced composite material reinforced with carbon fibers having high rigidity is formed on the inner peripheral surface of the aluminum alloy pipe to be shorter than the length of the aluminum alloy pipe to increase the natural frequency, have.

The present invention can concentrate a fiber reinforced composite material reinforced with carbon fibers having high rigidity on the inner circumferential surface of an aluminum alloy pipe at the center portion of the inner circumferential surface of an aluminum alloy pipe to thereby produce a propeller shaft having a higher natural frequency with the same amount of composite material .

The present invention is advantageous in that the manufacturing process is easier than the conventional propeller shaft, the dynamic performance of the structure is increased, the weight is reduced, and the manufacturing cost is reduced.

1 is a view showing a method of manufacturing a hybrid propeller shaft according to an embodiment of the present invention.
2 is a view illustrating a process of inserting a prepreg into an aluminum alloy pipe using a mandrel according to an embodiment of the present invention.
3 is a cross-sectional view of a hybrid propeller shaft according to the first, second, and third embodiments of the present invention.
4 is a view showing an example of a hybrid propeller shaft according to an embodiment of the present invention.
5 is a sectional view showing a hybrid propeller shaft according to fourth, fifth, and sixth embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

FIG. 1 is a view illustrating a method of manufacturing a hybrid propeller shaft according to an embodiment of the present invention, and FIG. 2 is a view illustrating a process of inserting a prepreg into an aluminum alloy pipe using a mandrel according to an embodiment of the present invention .

A method of manufacturing a hybrid propeller shaft 100 according to an embodiment of the present invention includes a step S100 of winding a prepreg 130, which is a composite material, on an outer peripheral surface of a mandrel 120, A step S 102 of inserting the prepreg 130 wound on the aluminum alloy pipe 110 into the aluminum alloy pipe 110 and a step S 102 of inserting the prepreg 130 into the aluminum alloy pipe 110 while rotating the mandrel 120 (S104).

The aluminum alloy pipe 110 represents an aluminum shaft that is coupled to a rotating shaft that transmits engine power. Here, the rotating shaft may be any device capable of transmitting engine power including a wheel of an automobile.

The prepreg 130 is a fiber reinforced composite material reinforced with sheet-like carbon fibers impregnated with resin and carbon fibers at a predetermined ratio in advance.

The prepreg molding process is a process of manufacturing the fiber-reinforced composite material 130 by processing the film into a film form and using the prepreg 130 which is made uncured.

The hybrid propeller shaft 100 is manufactured by using an aluminum alloy and a fiber reinforced composite material 130 that are lighter than steel and have better torque transmission capability.

The aluminum alloy pipe 110 serves to transmit torque, and the prepreg 130 laminated inside the aluminum alloy pipe 110 enhances the rigidity in the axial direction, thereby enhancing the natural frequency of the propeller shaft.

Further, the aluminum alloy pipe 110 is protected from external impact, and a reliable propeller shaft can be manufactured.

 And the composite material prepreg 130 in a hardened state is laminated and cured.

The hybrid propeller shaft 100 functions to increase the natural frequency by laminating the fiber-reinforced composite material 130 reinforced with carbon fibers having high rigidity inside the aluminum alloy pipe 110.

FIG. 3 is a sectional view showing a hybrid propeller shaft according to the first, second and third embodiments of the present invention, FIG. 4 is a view showing an example of a hybrid propeller shaft according to an embodiment of the present invention, 4 is a cross-sectional view of a hybrid propeller shaft according to the fourth, fifth, and sixth embodiments.

As shown in FIG. 3 (a), the first embodiment stacks the entire mandrel 120 on the entire inner peripheral surface of the aluminum alloy pipe 110 when the prepreg 130 is laminated while rotating the mandrel 120.

3B and 4, in the second embodiment, when the prepreg 130 is laminated while rotating the mandrel 120, bending (bending) occurs in the inner peripheral surface of the aluminum alloy pipe 110 And is stacked at the central portion in the pipe length direction to be concentrated.

The second embodiment of the present invention is configured such that the length of the prepreg 130 laminated on the inner circumferential surface of the aluminum alloy pipe 110 is made shorter than the length of the aluminum alloy pipe 110 of the outside.

In the case where the propeller shaft is simply supported at both ends, the natural frequency of the propeller shaft is expressed by the following equation (1).

Figure 112015088965556-pat00001

here,

Figure 112015088965556-pat00002
The stiffness,
Figure 112015088965556-pat00003
Is the moment of inertia,
Figure 112015088965556-pat00004
Is the mass per unit length,
Figure 112015088965556-pat00005
Represents the total length.

According to the above-described equation (1), the natural frequency increases as the stiffness increases and as the mass decreases, which means that the natural frequency is higher when the mass is smaller at the same stiffness.

Since the hybrid propeller shaft 100 of the present invention does not significantly affect the stiffness of the composite material 130 laminated at both ends in the primary vibration mode, the entire mass of the propeller shaft is reduced when the portion is removed, .

When the fiber reinforced composite material (prepreg) 130 is removed from the inner peripheral surface of the aluminum alloy pipe 110 at the central portion in the longitudinal direction of the pipe, the natural frequency is further increased.

The second embodiment of the present invention is different from the first embodiment in that when the fiber-reinforced composite material 130 is laminated on the inner peripheral surface of the aluminum alloy pipe 110 in the longitudinal direction of the pipe, It can be stacked more easily.

As shown in FIG. 3 (b) and FIG. 4, in the second embodiment, a propeller shaft in which a fiber-reinforced composite material 130 is intensively stacked in the central portion in the longitudinal direction of the pipe in the inner peripheral surface of the aluminum alloy pipe 110 .

In the second embodiment, the fiber-reinforced composite material 130 is formed to be shorter than the length of the aluminum alloy pipe 110. In the second embodiment, the prepreg 130 wound around the mandrel 120 is inserted into the aluminum alloy pipe 110, and the prepreg 130 is inserted into the aluminum alloy pipe 110 while rotating the mandrel 120 110, the shorter the length of the prepreg, the easier the lamination process and the advantage of production and commercialization.

When the prepregs 130 of the same weight are stacked on the inner circumferential surface of the aluminum alloy pipe 110, as compared with the case where the prepreg 130 is uniformly stacked on the entire inner circumferential surface of the aluminum alloy pipe 110 as in the first embodiment So that the laminated area can be reduced to half and the laminated thickness of the fiber-reinforced composite material 130 can be doubled to be laminated in the center portion in the pipe length direction.

3C, when it is necessary to stack the composite material 130 on the entire surface of the inner circumferential surface of the aluminum alloy pipe 110 for the purpose of balancing or the like, The prepreg 130 may be laminated and manufactured by dividing the prepreg 130 into a plurality of portions at a predetermined distance from the inner circumferential surface of the pipe 110.

As shown in FIG. 5A, in the fourth embodiment, when the fiber-reinforced composite material 130 is laminated on the inner circumferential surface of the aluminum alloy pipe 110, the fiber-reinforced composite material 130 is bonded to the aluminum alloy pipe 110 ) Is laminated so as to become thicker toward the central portion in the pipe length direction.

5 (b), the fifth embodiment differs from the fifth embodiment in that when the fiber-reinforced composite material 130 is laminated on the inner circumferential surface of the aluminum alloy pipe 110, the fiber-reinforced composite material 130 is bonded to the aluminum alloy pipe 110 The fiber-reinforced composite material 130 is laminated on the inner circumferential surface of the aluminum alloy pipe 110 so as to be gradually thicker toward the center in the pipe length direction.

As shown in FIG. 5 (c), in the sixth embodiment, the prepreg 130 is laminated on the inner peripheral surface of the aluminum alloy pipe 110 at the center in the pipe longitudinal direction, and the prepreg 130 is stacked The vibration damping layer 140 may be formed by processing a portion where the prepreg 130 is not laminated on both sides with a damping material that is vibration damped to reduce vibration and noise.

The hybrid propeller shaft 100 may be formed by laminating the composite material 130 at the central portion of the inner circumferential surface of the aluminum alloy pipe 110 in the longitudinal direction of the pipe or by dividing the composite material 130 into a plurality of portions at predetermined distances In addition, since propeller shafts are easy to manufacture and natural frequencies can be improved, more reliable propeller shafts can be manufactured at lower manufacturing costs. That is, the sixth embodiment is a propeller shaft having a vibration damping layer 140.

The propeller shaft of the present invention may be manufactured in various manners such as laminating the composite prepreg 130 on the inner circumferential surface of the aluminum alloy pipe 110 and curing or inserting the prepared composite prepreg 130 into the aluminum alloy pipe 110.

The method of inserting and bonding the pre-fabricated prepreg 130 in advance may be such that the aluminum alloy pipe 110 is preheated and thermally expanded, and then bonded to the composite prepreg 130.

Such a manufacturing method of the hybrid propeller shaft 100 can improve adhesion reliability due to shortening of production time and shrinkage of aluminum.

The length of the prepreg 130 to be inserted, adhered or laminated in the manufacturing process of the hybrid propeller shaft 100 is shorter than that of the conventional process, so that the prepreg 130 can be easily manufactured and the aluminum alloy pipe 110 By concentrating the center portion of the inner peripheral surface in the longitudinal direction of the pipe, the same amount of prepreg 130 has a higher natural frequency.

The embodiments of the present invention described above are not implemented only by the apparatus and / or method, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: Hybrid propeller shaft
110: Aluminum alloy pipe
120: Mandrel
130: prepreg, fiber reinforced composite material
140: vibration damping layer

Claims (11)

delete delete An aluminum alloy pipe coupled to a rotating shaft that transmits engine power; And
And a fiber reinforced composite material reinforced with carbon fibers formed on an inner peripheral surface of the aluminum alloy pipe, wherein the fiber reinforced composite material is formed to be shorter than the length of the aluminum alloy pipe,
Wherein the fiber-reinforced composite material is laminated so that the thickness of the laminated layer gradually increases from the inner circumferential surface of the aluminum alloy pipe toward the center of the pipe in the longitudinal direction of the pipe, and the thickness of the laminated layer at the center is thicker than twice Hybrid propeller shaft. The method of claim 3,
Wherein a vibration damping layer is formed on both sides of the portion on which the fiber-reinforced composite material is formed, the vibration-damping layer being formed by treating the portion on which the fiber-reinforced composite material is not formed, with a material capable of vibration damping. delete delete delete delete delete delete Winding a fiber-reinforced composite material reinforced with carbon fibers on an outer peripheral surface of a Mendrel;
Inserting the fiber reinforced composite material wound on the mandrel into an aluminum alloy pipe coupled to a rotating shaft for transmitting engine power; And
And forming the fiber-reinforced composite material on the inner circumferential surface of the aluminum alloy pipe while rotating the mandrel,
Wherein forming the aluminum alloy pipe on the inner circumferential surface comprises:
Wherein the fiber reinforced composite material is formed so as to be shorter than the length of the aluminum alloy pipe and laminated so that the thickness of the lamination layer gradually increases from the inner peripheral surface of the aluminum alloy pipe toward the center of the pipe in the longitudinal direction of the pipe, Wherein the step of laminating the laminated propeller shaft comprises laminating the laminated laminate so that the laminated laminate is thicker than twice.
KR1020150129518A 2015-09-14 2015-09-14 Hybrid Propeller Shaft and Method for Manufacturing Thereof KR101744705B1 (en)

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KR102221057B1 (en) * 2019-12-24 2021-02-26 남양넥스모 주식회사 Intermediate shaft of steering apparatus
CN112431866B (en) * 2020-11-20 2022-09-20 上海纳铁福传动系统有限公司 Transmission shaft tube joint structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100515800B1 (en) * 2002-10-23 2005-09-21 한국과학기술원 A drive shaft with a compound material and method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100515800B1 (en) * 2002-10-23 2005-09-21 한국과학기술원 A drive shaft with a compound material and method thereof

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