KR100610909B1 - Devices driven by oil in vehicles - Google Patents

Abstract

A vehicle oil driving device comprising: a housing in which oil is contained together with an internal part; and a connecting part connected to the housing through a wall of the housing at a connection part of the housing; and an oil seal installed between the wall and the connection part at the connection part. The wall has a first locking groove formed outside the oil seal and having a diameter larger than the oil seal diameter, and a second locking groove formed inside the oil seal and having a diameter larger than the first locking groove. Disclosed is a vehicle oil driving device, characterized in that the outermost portion is positioned in the first locking groove when the part is connected to the housing, and is further provided with a protective device installed to cover the outermost periphery of the oil seal.

According to the present invention, it is possible to prevent the oil seal from being damaged when assembling and installing the connecting parts, and thus, the mounting function of the connecting parts does not interfere with the function of the shaft. It can increase.

Description

Devices driven by oil in vehicles

1 is a schematic partial cross-sectional view showing a case where a phenomenon occurs in a conventional dust lip oil seal.

2 is a schematic plan view of a protector;

3 is a perspective view of a steel guard oil seal,

Fig. 4 is a schematic partial sectional view showing a problem when the shaft is screwed into a connection portion with a steel guard oil seal;

5 is a plan view showing a protective device installed in the connecting portion in an embodiment of the present invention,

6 is a perspective view showing a form in which the protective equipment is installed in the connecting portion according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10,40: Oil seal 13: dust lip

14: protector 20: inside the hole

21: groove 30: shaft

41: steel guard 43: lip area

50: protector 51: housewife

53: connection part 55: housewife

57: incision 60: housing

The present invention relates to an oil drive device for a vehicle, and more particularly, to an apparatus for protecting an oil seal that prevents leakage of oil in a portion connected to an axis in a vehicle oil drive device.

Oil drive devices in vehicles, such as transmissions and accelerators, typically have a shaft-like connection component, such as a drive shaft, that connects the interior and exterior through the wall of the portion containing the oil (eg the housing of the transmission). It is easy for the oil inside the wall to leak out through the gap between the wall and the part at the connection where the connecting part meets the wall of the part containing the oil. Therefore, in order to prevent such oil leakage, the connection portion of the wall and the connecting part is usually provided with an oil seal.

At this time, since the mechanical seal or pressure is easily applied to the oil seal, the oil seal itself should have durability against mechanical friction. In addition, the wall and the connecting parts must have elasticity and adhesion so as to be in close contact with their surfaces even in a relatively moving operation so that oil does not leak into the gap of the connecting portion.

However, even when the oil seal has such a property, the oil seal may be damaged and oil leak may occur regardless of the operation of a conventional oil drive device. For example, when the drive shaft is assembled and installed in the transmission, the position where it is fitted is initially incorrect or the angle is incorrectly inserted, causing the shaft end to squeeze and slide over the oil seal, causing the soft oil seal to become damaged. have.

Fig. 1 is a schematic partial cross sectional view showing a case where a phenomenon occurs in a conventional dust lip oil seal, and Fig. 2 is a schematic plan view of a protector.

Conventional dust lip oil seal has a dust lip (13: dust lip) portion is formed to the outside to effectively prevent the intrusion of dust or moisture, as shown in Figure 1 has its own means for holding the position of the shaft 30 When the shaft 30 is assembled, the shaft 30 is frequently damaged by pressing the oil seal 10. In order to prevent such a phenomenon, a connection tool such as a protector 14 made of a material such as rubber (rubber) may be used at the inlet of the connection portion in which the oil seal 10 is installed.

However, when using the protector 14, it is necessary to install the protector 14 at the correct position to guide the shaft 30 to the connection inlet before inserting the shaft 30 into the transmission, and remove the protector 14 again after assembly. There is another problem that the productivity is reduced because of the hassle.

Fig. 3 is a perspective view of the steel guard oil seal, and Fig. 4 is a schematic partial cross-sectional view showing a problem when the shaft is screwed into the connection portion on which the steel guard oil seal is mounted.

In the steel guard type oil seal 40, in consideration of the problem of the conventional dust lip oil seal, the oil seal 40 in which the steel guard 41 is integrally formed is provided in the connection part of an oil drive apparatus. Therefore, the steel guard 41 acts to guide the shaft 30 so that the end portion of the shaft 30 to which the shaft 30 is normally coupled is inserted into the connection position, thereby preventing the problem of damaging the oil seal 40.

However, since the inner diameter dimension of the steel guard 41 cannot be smaller than the outer diameter dimension of the shaft 30 coupled to the connecting portion, there is a slight gap between the shaft 30 and the steel guard 41. When the shaft 30 is slightly inclined as shown in FIG. 4 due to the gap, the shaft 30 slides in contact with the spline of the steel guard 41 to damage the lip 43 of the oil seal 40. do.

The present invention is to solve the conventional problems as described above, an oil drive device for a vehicle that can prevent damage to the oil seal that is installed to prevent oil leakage in the connection portion when assembling and installing the connecting parts such as shafts. It aims to provide.

It is an object of the present invention to provide an oil driving device for a vehicle having a connection structure which prevents the oil seal from being damaged when assembling the connecting parts and increases the efficiency of the assembling work.

The present invention for achieving the above object, the housing housing the oil together with the internal parts, the connecting portion of the housing formed by forming a hole in the wall of the housing, and the connection of the housing through the connection of the wall through the connection A vehicle oil driving device comprising a shaft-shaped connecting part and an oil seal installed between the wall and the connecting part at the connecting part, wherein the wall is formed outside the oil seal and is larger than the oil seal diameter. And a first locking groove having a second locking groove formed inside the oil seal and having a larger diameter than the first locking groove, and having an outermost angle to the first locking groove when the connecting part is connected to the housing. It is positioned to cover the outermost periphery of the oil seal, characterized in that the protective device is further provided Shall be.

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In the present invention, the protective device is a ring as a whole, a portion of the wire rod constituting the ring has a plurality of extensions formed to extend to the outside of the ring. Therefore, before the connecting part is connected to the housing at the connecting part, the outermost part of the expansion part is mounted while wrapping the outermost peripheral part of the oil seal in the first locking groove as if it is spread out. The annular part is formed to be smaller than the diameter of the connecting part when the expansion part is mounted in the first locking groove, and a part of the protective part is cut in an extension part or a small inner diameter part forming a ring to be elastically outward from the center. Receive the power to unfold.

In the present invention, the protective device is preferably formed of a metal wire so as to have elasticity against deformation, and is formed to surround the oil seal when mounting the connecting portion of the first housing, so that the end of the connecting component is inserted when the connecting component is drawn into the housing. It serves as a guide. In this case, the path through which the metal wire constituting the protective device passes may be seen in the hole of the connection part or on a surface similar to the funnel installed on the oil seal.

In the present invention, it is preferable that the expansion portion of the protective device is provided at a predetermined interval on the ring with a predetermined width, so that the oil seal can be protected even when the end of the connecting part such as the shaft is biased in any direction and enters the connection portion. Therefore, the number of formation and the formation interval of the extension are adjusted according to the size of the shaft. For example, the larger the shaft diameter, the smaller the number of extensions.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 5 is a plan view showing a protective device installed in the connecting portion in an embodiment of the present invention, Figure 6 is a perspective view showing a form in which the protective equipment is installed in the connecting portion according to an embodiment of the present invention.

In one embodiment of the present invention, the portion forming the ring of the protective device 50 is called the inner circumferential portion (51), the expansion portion outer circumferential portion (55) and the inner circumferential portion (51) forming a portion of a larger radius on the outside of the ring And can be divided into a connecting portion 53 for connecting the outer circumferential portion (55). In this case, the inner circumferential portion 51 and the outer circumferential portion 55 may be regarded as being made of circular arcs having the same number of radii. At this time, if the center angle occupied by one arc of the outer circumference portion 55 and the center angle occupied by one arc of the inner circumference portion 51 are the same, the connecting portions 53 are provided at equal intervals. In addition, when three expansion portions are formed at intervals of 120 degrees, the connecting portions 53 are installed at all six portions at equal intervals to serve as guard rails for the ends of the connecting parts such as shafts. The inner circumference part or the outer circumference part has a cutout portion 57, and has an elasticity to be stretched outward, so that there is no limit to the surroundings, the cutout portion 57 opens to form a circular shape having a larger diameter.

At this time, it is preferable that the expansion part of the protective device 50 is installed at a predetermined interval on the ring with a predetermined width, so that the oil seal can be protected even when the end of the connecting part such as the shaft is biased in any direction and is introduced into the connection part. Therefore, the number of formation and the formation interval of the extension are adjusted according to the size of the shaft. For example, if the shaft diameter is small, the number of extensions should be increased and the forming width will be reduced.

Hereinafter, the function of the protective device 50 will be described with reference to FIG. 6. An oil seal is provided on the inner surface 20 of the hole forming the connection portion of the housing 60. There is a steel guard 41 to protect the oil seal on the outside of the oil seal, and since the protective device 50 in the present invention, the steel guard 41 is not essential to the oil seal. A groove 21 is formed in the inner surface 20 of the hole from the oil seal to the outside of the housing 60. This corresponds to the first locking groove of the present invention. As shown in Fig. 5, the protective device 50 has three extension centers formed at intervals of a central angle of 120 degrees, and the outermost part of the extension corresponds to an arc of the outer circumference and is caught in the first locking groove 21. .

The inner circumferential portion corresponding to the annular portion of the present invention is located at the lip portion 43 of the oil seal, and its diameter is slightly smaller than the end diameter of the shaft, which is the connecting means to be inserted into the connecting portion, corresponding to the inner diameter of the protective tool. Thus, when the shaft is inserted into the connection part, the oil seal is first protected from being imprinted by the outermost part of the extension forming the outer diameter of the guard, ie the outer circumference part and the connecting part. If a steel guard 41 is present, the steel guard 41 also serves to protect the lip portion 43 of the oil seal. When the shaft is further introduced into the hole of the connecting portion, the ring or inner circumferential portion forming the inner diameter of the protective gear is touched, and the protective tool 50 is pushed into the housing 60.

Since the protection tool 50 has a cutout 57 at a part and is made of an elastic wire rod, the entirety is pushed into the housing by being pushed to the shaft end. The outer circumferential part slides out of the first locking groove 21 of the hole inner surface 20 and slides into the inner surface of the oil seal to be caught by a second locking groove (not shown) having a diameter larger than the first locking groove. The oil seal inner surface from the path | route to the 2nd locking groove | channel is formed so that there may be no sharp inclination jaw.

When the outer circumference of the protective device 50 is placed in the second locking groove, since the protective device 50 has an elastic force to be extended to the outside, the protective device 50 is immediately in close contact with the second locking groove, and the diameter of the outer circumference of the outer peripheral portion increases by the diameter of the second locking groove. The inner diameter of the protective device, that is, the diameter of the inner circumference portion also increases. At this time, the increased diameter of the inner circumference is greater than the diameter of the shaft end, the shaft is no longer pushed into the housing 60 while the shaft is inserted into the connection hole. That is, the protective device 50 is fixed while the outer circumference portion is in close contact with the second locking groove and no longer touches the shaft. Thus, even when the shaft is rotated in a state of being fastened to the connecting portion, the protective device does not contact or rub against the shaft and does not interfere with the movement of the shaft.

According to the present invention, while preventing the oil seal from being damaged when assembling and connecting the connecting parts such as the shaft by the action of the protective device, the contact of the protective device and the shaft is lost in the state that the mounting of the connecting parts is completed, which interferes with the function of the shaft. Therefore, it is possible to increase the efficiency of assembling the connecting parts in the vehicle oil driving device.

Claims (6)

A housing accommodating oil together with an internal component, a connecting portion of the housing formed by forming a hole in a wall of the housing, a shaft-shaped connecting component connected through the hole of the wall at the connecting portion of the housing and the connecting portion at the In the vehicle oil driving device comprising an oil seal provided between the surface of the hole and the connecting part, A surface of the hole is formed on the outer side of the housing based on the oil seal and formed into an inner side of the housing based on the oil seal and a first locking groove having a diameter larger than the oil seal diameter. A second locking groove having a larger diameter is provided, When the connection part is connected to the housing, the vehicle oil driving device further comprises a protective device which is installed so as to cover the outermost periphery of the oil seal in the outermost position in the first locking groove. The method of claim 1, The protective device is in a ring, Some sections of the wire rod constituting the ring has a plurality of extensions formed to extend to the outside of the ring, An oil driving device for a vehicle, characterized by having a cutout in a part. The method of claim 2, Before the connecting part is connected to the housing at the connection part, the outermost part of the extension part is mounted to the first locking groove, The ring is formed to be smaller than the diameter of the connecting part when the expansion portion is mounted in the first engaging groove, is made of an elastic body, characterized in that it is made to extend outward from the center by elasticity when there is no external force . The method of claim 3, wherein And the protector is formed such that the diameter of the ring is larger than the diameter of the connecting part when the outermost part of the extension part is placed in the second locking groove. The method of claim 2, The expansion unit of the protective device is a vehicle oil drive device, characterized in that installed on the ring at a predetermined interval. The method of claim 2, The expansion unit is a vehicle oil drive device, characterized in that consisting of a circular arc of a circle having a larger diameter than the ring and the connecting portion connecting the circular arc and the ring portion.

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