KR20100064846A - Propeller shaft having sliding structure - Google Patents

Abstract

PURPOSE: A propeller shaft with a sliding structure is provided to prevent the propeller shaft from being corroded by preventing foreign materials from flowing in. CONSTITUTION: A propeller shaft with a sliding structure comprises a first shaft(100), a second shaft(400), a boot(200), an insert(300), a first clamp(500a), and a second clamp(500b). First spines are formed on the outer surface of the first shaft. Second spines(410) are formed on the inner and outer surfaces of the second shaft. The boot prevents foreign materials from flowing into the first and second shafts. The insert is made of an elastic material. The first clamp couples the first shaft and one end of the boot. The second clamp couples the second shaft, the insert, and the other end of the boot.

Description

Propeller shaft with sliding structure {PROPELLER SHAFT HAVING SLIDING STRUCTURE}

The present invention relates to a propeller shaft of a sliding structure, and more particularly, to a propeller shaft of a sliding structure for maintaining the airtightness of the propeller shaft sliding portion and blocking the introduction of foreign matter.

The propeller shaft is a power transmission shaft that transmits the power of the engine transmitted through the transmission from the rear wheel drive vehicle or the four wheel drive vehicle to the differential gear (differential gear) in the front and rear of the vehicle. And, the conventional propeller shaft is composed of a driven shaft yoke fixed to the drive unit, a spline formed in the axial direction on the inner circumferential surface or the outer circumferential surface of the cylinder is coupled to the driven shaft yoke and the cross-shaft through the propulsion shaft yoke, to transfer the rotational force, It consists of a cylindrical tube etc. which are couple | bonded with the inner peripheral surface or outer peripheral surface of this propulsion shaft yoke.

The propeller shaft is generally divided into two parts, the transmission side and the differential gear side, which are connected by a center bearing. The universal joint is used to connect the propeller shaft to the transmission and differential gear, which prevents the vertical position of the transmission and differential gear from changing due to the impact of the road surface.

1 is a side view showing a propeller shaft assembly for a vehicle according to the prior art.

The propeller shaft includes a driven shaft yoke 10 coupled to a transmission (not shown in the drawing) side, a propulsion shaft yoke 30 coupled to the driven shaft yoke 10 and a cross shaft 20, and the propulsion shaft yoke. It consists of a pipe portion 40 slidably coupled to 30.

The inner surface of the propeller shaft yoke 30 is formed with an arm spline in the longitudinal direction of the propeller shaft. The sliding portion 45 at the front end of the pipe portion 40 is inserted into the inner circumferential surface of the propulsion shaft yoke 30 and a male spline is formed on the outer circumferential surface so that the sliding portion 45 can slide in the front-rear direction.

Therefore, the propeller shaft can transmit the rotational force generated in the engine (not shown in the figure) and can absorb the change in length generated from the vertical movement of the differential gear (not shown in the figure).

The propeller shaft of the above structure is difficult to maintain the airtight in the sliding structure consisting of the propulsion shaft yoke 30 and the sliding portion 45, it is not possible to block the phenomenon of corrosion and foreign matter inflow.

The present invention has been made to solve the above-mentioned problems, to provide a propeller shaft having a sliding structure that can prevent the entry of foreign matters such as moisture to maintain the airtight in the sliding structure of the propeller shaft to prevent corrosion of the propeller shaft. The purpose is to.

The propeller shaft of the present invention for achieving the above object, the first shaft formed with a spline on one side outer peripheral surface; A second shaft having splines formed on an inner circumferential surface and an outer circumferential surface of the first shaft so as to be slidable; A boot for absorbing a change in length as well as preventing foreign substances from flowing around the connecting portion of the first shaft and the second shaft; An elastic material insert having a spline formed on an inner circumferential surface so as to be in close contact with an outer circumferential surface spline of the second shaft; A first clamp fastening one end of the boot with the first shaft; And a second clamp for fastening the outer circumferential surface of the second shaft, and the other end of the insert and the boot are sequentially overlapped.

The insert may be made of a rubber material.

The insert may be formed integrally with the inner circumferential surface of the outer ring of the metal material inserted into the boot.

A portion located inside the boot of the end of the insert and the outer ring may be formed to be curved to be caught by the end of the second shaft.

The opposite side of the second shaft in which the first shaft is sliding is blocked by an expansion plug, and the air hole of the expansion plug may be covered with a rubber molded part in which a center portion is cut into a predetermined length.

The rubber molded part may be formed by cutting in a cross shape.

According to the present invention, by preventing foreign substances such as moisture from entering the sliding structure of the propeller shaft to prevent corrosion phenomenon, the durability of the propeller shaft can be improved.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

2 is an exploded perspective view showing a propeller shaft according to a first embodiment of the present invention, Figure 3 is an exploded perspective view of the propeller shaft shown in FIG.

The propeller shaft of the present invention, as shown in Figure 1, is coupled via a driven shaft yoke 10, the driven shaft yoke 10 and the cross-shaft 20 connected to the transmission (not shown in the figure) side It is the same as the conventional one in that it consists of the propulsion shaft yoke 30 and the pipe part 40 slidably coupled to the said propulsion shaft yoke 30.

The present invention relates to a sliding coupling structure of the propulsion shaft yoke 30 and the pipe portion 40.

The propeller shaft is splined on the inner circumferential surface 410a and the outer circumferential surface 410b such that the first shaft 100 having the spline 110 formed on one outer circumferential surface thereof and the spline 110 of the first shaft 100 are slidable. 410 is formed in the second shaft 400, the first shaft 100 and the second shaft 400 to prevent foreign matter (for example, water, dust, salt, etc.) and also to prevent the propeller shaft A boot 200 for absorbing a change in length, an insert 300 of an elastic material having a spline formed on an inner circumferential surface 300a so as to be in close contact with the spline of the outer circumferential surface 410b of the second shaft 400, and the first shaft 100 and the first clamp 500a for fastening one end 200a of the boot 200, the second shaft 400, the insert 300, and the other end 200b of the boot 200 are sequentially stacked. It includes a second clamp (500b) for fastening the outer peripheral surface in the state.

The first shaft 100 is connected to the rear of the vehicle, and the second shaft 400 is connected to the front of the vehicle, and has a hollow shaft shape.

The spline 110 formed on one outer circumferential surface of the first shaft 100 is inserted into the spline 410 of the second shaft 400, and relative movements (sliding) to the front and rear of the vehicle with the two splines 110 and 410 engaged with each other. Done.

The tube 200 is made of a corrugated tube shape of the central torso surface to absorb the change in length due to the sliding movement.

The insert 300 is inserted outside the spline 410 of the second shaft 400. The insert 300 is made of an elastic material, for example, a rubber material, and the inner circumferential surface 300a has a spline shape to be engaged with the spline 410 of the second shaft 400. Therefore, by keeping the airtight between the second shaft 400 and the tube 200, it is possible to block foreign matter from flowing into the shaft (100,400). The outer circumferential surface 300b of the insert 300 is inserted into the end portion 200b of the tube 200 and thus has a smooth surface.

One end 200a of the tube 200 is coupled by the first clamp 500a at the spline raw portion 120 of the first shaft 100.

The other end 200b of the tube 200 is coupled by the second clamp 500b at the spline 410 of the second shaft 400.

Second Embodiment

4 is a sectional view showing a propeller shaft according to a second embodiment of the present invention, Figure 5 is a partially enlarged view of the propeller shaft shown in FIG.

The second embodiment has the same configuration as the first embodiment in that the first shaft 100, the boot 200, and the second shaft 400 are provided, but the insert 620 is inserted into the outer ring 610 made of metal. There is a technical feature in that the structure is combined and molded in one piece.

In other words, the rubber insert 610 is integrally molded into the outer ring 610 of the metal material (for example, steel), and is composed of one body.

In the first embodiment, the sliding phenomenon of the insert 300 may occur when the shaft is slid, but in the second embodiment, the insert 620 made of rubber is integrally formed on the inner surface of the outer ring 610 of steel. This phenomenon is prevented.

In this case, the portions 610a and 620a positioned inside the boot among the ends of the outer ring 610 and the insert 620 are curved to be caught by the spline end 410c of the second shaft 400. It is preferable to make.

In addition, it is preferable that the other end portion 610b of the outer ring 610 also has an upper shape.

Third Embodiment

6 is a partial cross-sectional view showing a propeller shaft according to a third embodiment of the present invention, Figure 7 is a view showing an expansion plug of the present invention.

Referring to FIG. 6, a driven shaft yoke 10 connected to a transmission (not shown) side and a cross shaft 20 connected to the driven shaft yoke 10 are provided, and the cross shaft 20 is provided. The second shaft 400 is connected to each other.

In the vehicle rear side of the second shaft 400, as shown in Figs. 2 and 3, the first shaft 100 is coupled to slide.

The interior space 400a of the second shaft 400 is blocked by the expansion plug 700 on the front side of the vehicle (the side opposite to the sliding of the first shaft).

The expansion plug 700 blocks the inflow of foreign substances due to the dome-shaped body 710 and at the same time, the first shaft 100 and the second shaft 400 by air holes formed in the center of the body 710. When sliding, the air inside the shaft can be discharged to the outside.

In this case, since the foreign matter and moisture can penetrate the air hole, the air hole is covered by a rubber molding part 720 in which a center part is cut into a predetermined length and air can be discharged through the cut part.

The rubber molding part 720 is preferably molded integrally with the body 710.

The cut portion of the rubber molded part 720 is preferably cut in a cross shape.

As described above, the embodiments of the present invention have been described by way of example only, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the spirit of the present invention. I can understand that.

1 is a side view of a vehicle propeller shaft assembly according to the prior art,

Figure 2 is a perspective view showing a propeller shaft according to the first embodiment of the present invention,

3 is an exploded perspective view of the propeller shaft shown in FIG. 2;

4 is a cross-sectional view showing a propeller shaft according to a second embodiment of the present invention;

5 is a partially enlarged view of the propeller shaft shown in FIG. 4;

6 is a partial cross-sectional view showing a propeller shaft according to a third embodiment of the present invention;

7 shows an expansion plug of the present invention.

Explanation of symbols on the main parts of the drawings

100: first shaft 110: spline

200: boot 300: insert

400: second shaft 410: spline

500a: first clamp 500b: second clamp

Claims (6)

A first shaft having a spline formed on one outer circumferential surface thereof; A second shaft having splines formed on an inner circumferential surface and an outer circumferential surface of the first shaft so as to be slidable; A boot for absorbing a change in length as well as preventing foreign substances from flowing around the connecting portion of the first shaft and the second shaft; An elastic material insert having a spline formed on an inner circumferential surface so as to be in close contact with an outer circumferential surface spline of the second shaft; A first clamp fastening one end of the boot with the first shaft; A second clamp for engaging the outer circumferential surface of the second shaft with the other end of the insert and the boot sequentially; Sliding propeller shaft comprising a. The propeller shaft of claim 1, wherein the insert is made of a rubber material. The propeller shaft of claim 1 or 2, wherein the insert is integrally formed on an inner circumferential surface of an outer ring of a metal material inserted into the boot. [4] The propeller shaft of claim 3, wherein a portion of the insert and the outer end of the outer ring positioned inside the boot is curved to be caught by the end of the second shaft. The sliding side of claim 1, wherein an opposite side of the second shaft in which the first shaft is slid is closed by an expansion plug, and the air hole of the expansion plug is covered by a rubber molded part in which a center portion is cut into a predetermined length. Structure of propeller shaft. The propeller shaft of claim 5, wherein the rubber molded part is cut in a cross shape.

Images