KR101774700B1 - Roller Tappet Device with Clip Type Anti-Rotation Member - Google Patents

Abstract

The present invention relates to a roller tappet device which comprises: a main body which forms the outer appearance thereof; a roller which touches a cam of a cam shaft and is combined with the main body to be able to rotate; a bridge which crosses an inner side of the main body and has one side touching a high pressure pump capable of supplying fuel to an engine; and a rotation preventing unit which is combined with the main body, and is geared to a guide groove on the engine or the high pressure pump in order to prevent the rotation of the main body in a sliding process for converting a rotary motion of the cam to a reciprocating motion. In addition, the rotation preventing unit includes: a clip which is formed in a plate shape and is combined with the main body; and a rotation preventing pin which is extended from the clip in order to be geared to the guide groove. Therefore, the present invention provides the roller tappet device with a clip type rotation preventing member which can save costs through convenient work, can reduce the weight thereof, and does not require machining work or a high degree of accuracy in manufacturing processes.

Description

(Roller Tappet Device with Clip Type Anti-Rotation Member)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller tappet apparatus having a clip type rotation preventing member, and more particularly, to a roller tappet apparatus having a clip type rotation preventing member that improves the structure for preventing rotation of the roller tappet.

Automobiles are made up of many parts.

In recent years, an electric vehicle has been developed, and in some cases, there is no engine, but it is a reality that an engine is used to produce power using gasoline or the like.

Such an engine is provided with an engine body as the heart of the vehicle, and the engine body is a source for generating power of the vehicle and is composed of a cylinder head and a cover, a cylinder block, and a power generating and transmitting component including a piston and a connecting rod and a crankshaft . The accessories of the engine main body include a cooling device, a lubricating device, an intake and exhaust device, and an electric device.

The valve driving device has a function of opening and closing the intake and exhaust valves quickly and accurately according to the stroke of the piston, and a cam shaft assembly is applied to open and close the intake and exhaust valves.

The camshaft assembly has a cam on the camshaft equal in number to the valve, and opens and closes the intake and exhaust valves in accordance with the operation of the piston of the engine, and the cam rotates integrally with the camshaft.

Meanwhile, there are various methods of supplying fuel to the engine, but in recent years, the GDI method (gasoline direct injection type) which directly injects fuel into the engine at high pressure has been developed and applied. Here, a high-pressure pump is used for raising the pressure supplied from the low-pressure fuel supply pump to a high pressure, and a piston pump is used as the high-pressure pump.

In order to operate the high-pressure pump, a cam for operating the high-pressure pump is connected to the camshaft, and power is transmitted between the piston of the high-pressure pump and the cam for operating the high-pressure pump, that is, the rotational motion of the cam is converted into the reciprocating motion of the piston A roller tappet device is used as a power transmitting means.

Such a roller tappet device is disclosed in Japanese Patent Application Laid-Open Nos. 10-2011-0126140 (2011.11.22), 10-2014-0000293 (2014.01.02).

The roller tappet device generally comprises a cylindrical main body, a roller coupled to the main body and rotating in contact with the cam of the camshaft, and a bridge formed on the inside of the main body to contact the roller and the piston of the high- It is preferable to provide the rotation preventing member so as not to rotate while reciprocating. Particularly, a structure for preventing rotation is disclosed in U.S. Patent Publication No. 8,235,018 (2012.08.07).

However, in the prior art such as U.S. Patent No. 8,235,018, the structure or the process of coupling the anti-rotation member to the main body is made by interference fit or welding, so that the work such as machining should be somewhat precise, There is a fear that the time and airflow may be increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roller tappet device having a clip type anti-rotation member capable of simply and conveniently coupling a rotation preventing portion to a tappet body.

It is also an object of the present invention to provide a roller tappet device having a clip type anti-rotation member that can simplify the operation and reduce the cost.

Still another object of the present invention is to provide a roller tappet apparatus having a clip type anti-rotation member capable of reducing weight.

Still another object of the present invention is to provide a roller tappet apparatus having a clip type rotation preventing member that does not require machining or high precision in the manufacturing process.

Still another object of the present invention is to provide a roller tappet apparatus having a clip type anti-rotation member capable of improving reliability.

An object of the present invention is to provide a roller tappet device, comprising: a main body having a cylindrical shape to form an outer appearance; A roller in contact with the cam of the camshaft and rotatably coupled to the body; A bridge which traverses the inside of the body and contacts one of the high pressure pumps which supply fuel to the engine; And a rotation preventing part coupled to the guide groove of the engine or the high pressure pump to prevent the rotation of the main body in a sliding process of converting the reciprocating motion of the rotation of the cam, And a rotation preventing pin extending from the clip and engaged with the guide groove.

Preferably, the anti-rotation fin is formed in a shape corresponding to the shape of the guide groove.

The clip body includes a clip body and a deformable member that is deformably formed on the clip body. The deformable member includes a clip body, And is coupled to the clip fixing member to be fixed to the clip fixing member.

Preferably, the anti-rotation part is formed integrally with the plate-like material and is bent.

In addition, the rotation preventing portion may include a connecting member that is integrally formed and is bent to connect the clip and the rotation preventing pin, wherein a distance between the clip and the rotation preventing pin adjacent to the connecting member is spaced apart from the connecting member, It is preferable that the distance between the clip and the anti-rotation pin is larger than the distance between the clip and the anti-rotation pin.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roller tappet device having a body forming an outer appearance; A roller in contact with the cam of the camshaft and rotatably coupled to the body; A bridge which traverses the inside of the body and contacts one of the high pressure pumps which supply fuel to the engine; And a rotation preventing part engaged with the guide groove of the engine or the high pressure pump so as to prevent rotation of the main body in a sliding process that is coupled to the main body and converts the reciprocating motion of the rotation movement of the cam, And a rotation preventing pin provided separately from the clip and engaged with the guide groove to prevent rotation, wherein the rotation preventing pin is fixed to the main body by the clip. .

The clip preferably includes a plate-like material and includes a clip body engaging member coupled to the main body and a clip preventing portion engaging member extending from the clip body engaging member and engaged with the rotation preventing pin .

According to the present invention, it is possible to provide a roller tappet device having a clip type anti-rotation member that can simplify the operation and reduce the cost, reduce the weight, and does not require machining or high precision in the manufacturing process have.

It is also possible to provide a roller tappet apparatus having a clip type anti-rotation member capable of improving the reliability of the apparatus.

1 is an exploded perspective view of a roller tappet apparatus according to an embodiment of the present invention,
FIG. 2A is an assembled perspective view of FIG. 1, FIG. 2B is a sectional view taken along the line IIb-IIb in FIG.
3 (a) to 3 (d) are schematic views for explaining the manufacturing process of the roller tappet apparatus,
4 (a) to 4 (d) are a perspective view and a plan view for explaining a process of assembling the roller tappet apparatus,
5 (a) to 5 (f) are schematic views for explaining a manufacturing process of a roller tappet apparatus according to another embodiment of the present invention,
6 (a) to 6 (d) are perspective views for explaining a process of assembling the roller tappet apparatus of another embodiment,
7 is a sectional view for explaining an example of use of the roller tappet apparatus according to the present invention,
8A and 8B are an exploded view and a plan view of a roller tappet apparatus according to another embodiment of the present invention.

Hereinafter, a roller tappet apparatus 100 (hereinafter referred to as a "tappet apparatus") having a clip type rotation preventing member according to the present invention will be described in detail with reference to FIGS. 1 to 6 (d).

FIG. 1 is an exploded perspective view of a roller tappet apparatus according to an embodiment of the present invention, FIG. 2 (a) is an assembled perspective view of FIG. 1, FIG. 2 (b) is a sectional view taken along a line IIb-IIb in FIG. 4A to 4D are a perspective view and a plan view for explaining a process of assembling the roller tappet apparatus, and FIGS. 4A to 4D are schematic views for explaining a manufacturing process of the roller tappet apparatus. FIGS. 5A to 5F are schematic views for explaining a manufacturing process of a roller tappet apparatus according to another embodiment of the present invention. FIGS. 6A to 6D are views showing a roller tappet apparatus 7A and 7B are sectional views for explaining an example of use of the roller tappet apparatus according to the present invention, and Figs. 8A and 8B are views for explaining the assembly process of the roller tappet apparatus according to another embodiment of the present invention Apostles and plan views.

The tappet apparatus (100) includes a main body (110) having a cylindrical shape to form an outer appearance; A roller 130 that is in contact with the cam 33 (see Fig. 7) of the camshaft 30 (see Fig. 7) and is rotatably coupled to the main body 110; A bridge 150 which traverses the inside of the main body 110 and makes contact with a high-pressure pump 20, one side of which supplies fuel to the engine; A rotation preventing member engaged with the guide groove 25 of the engine or the high-pressure pump 20 to prevent rotation of the main body 110 in a sliding process of being coupled to the main body 110 to change the reciprocating motion of the rotation movement of the cam, Wherein the rotation preventing portion 170 includes a clip 173 formed in a plate shape and coupled to the main body 110 and a guide portion 166 extending from the clip 173 to guide the guide groove 25, And a rotation preventing pin 175 which engages with the rotation preventing pin 175. [

The body 110 may be manufactured in a variety of ways, but may be integrally molded with the bridge 150, which will be described later, by a press method, as in the applicant's original application or application. The main body 110 has a generally cylindrical shape and a region where the roller pin 133 coupled to the roller 130 is engaged and a region where the rotation preventing portion 170 is engaged have a rectangular shape instead of a cylindrical shape. And various modifications may be made without departing from the spirit of the invention.

The main body 110 is provided with a clip fixing member 113 which is provided so that a plate-like clip 173 is surface-contact-engaged and engaged to fix the rotation preventing portion 170.

The clip fixing member (113) A clip seating portion 113a provided with a flat plate surface on which the clip 173 is in surface contact and a deformation member 173b connected to the clip seating portion 113a to deform the deformation member 173b in accordance with the shape of the deformation member 173b, 173 are firmly fixed to the main body 110. As shown in FIG.

1 and 7, the roller 130 always contacts the cam 33 by the urging force of the piston 23 of the high-pressure pump 20 and changes the height according to the rotation of the cam 33 to the main body 110 (in the reciprocating motion). This roller 130 preferably includes a bearing and can be rotatably supported by a roller pin 133 that is coupled to the center.

The roller pin 133 supports the roller 130 so as to be rotatable and is coupled to the roller pin hole 115 formed in the main body 110.

2 (b), the roller pin 133 is coupled to the roller pin hole 115 so that the roller pin 133 can not be detached from the main body 110 without rotating relative to the main body 110 The roller pin 133 can be coupled to the main body 110 by a cauking operation (see 133a in FIG.

The bridge 150 is formed across the central portion of the main body 110 and may be formed integrally with the main body 110 by a pressing process as described above and may be welded to the main body 110 if necessary. The bridge 150 is formed with a piston contact member 153 (see FIG. 4D) in contact with the piston 23 of the high-pressure pump 20 in a central region corresponding to the size of the piston 23.

The rotation preventing unit 170 rotates the main body 110 so that the tappet apparatus 100 moves in the linear direction while rotating the rotation of the cam 33 into the reciprocating motion of the piston 23, It limits the movement.

3 (a), the rotation preventing portion 170 is provided with a plate-like material 173a` and has a rotation preventing pin 175 formed in the inside of the clip 173 and the clip 173, .

The clip 173 includes a clip body 173a for holding a plate shape from a unitary material (see 173a in Fig. 3A) which is a plate-shaped raw material and a clip body 173b provided on the clip body 173a, And a deforming member 173b which is engaged with the clip supporting groove 113b and deformed to hold the clip body 173a in engagement with the main body 110. [ It is preferable to include a rotation preventing pin 175 protruding from the clip body 173a in a cylindrical outer shape, for example, in a shape that is engaged with the shape of the guide groove 25.

It is preferable that the rotation prevention pin 175 has a circular outer shape including a spherical shape at the upper and lower sides so as to guide smooth movement while linearly moving. That is, it has the same or similar shape as the outer shape of the conventional anti-rotation fin 175.

A manufacturing process of the tappet apparatus 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 (a) to 3 (d).

First, a unitary material 173a` for forming a clip 173 as shown in Fig. 3 (a) is provided from a plate-like material. Here, the plate material may be provided in various thicknesses, but in one embodiment, it may be 0.3-0.5 mm thick.

Next, as shown in Fig. 3 (b), a rotation preventing pin 175 having a semispherical outer shape at the center and a semi-cylindrical shape at the center is formed so as to protrude from the plate surface.

Next, as shown in Fig. 3 (c), a deforming member 173b deforming with the outer shape of the clip body 173a is formed, and a deforming slit 173c is formed so that the deforming member 173b can be deformed (Press process).

3 (d), the deforming member 173b is bent in the opposite direction in which the rotation preventing fins 175 are formed so as to be perpendicular to the surface of the clip body 173a so that the deforming member 173b can be engaged with the clip supporting groove 113b do.

A process of coupling and fixing the rotation preventing portion 170 to the main body 110 after completing such a process will be described in detail with reference to FIGS. 4 (a) to 4 (d).

4A and 4B, after the rotation preventing part 170 is positioned on the clip seating part 113a of the main body 110, the deformable member 173b of the rotation preventing part 170 is fixed to the clip supporting part 113a. The groove 113b is inserted so that the rotation prevention pin 175 is coupled outwardly.

Next, the deforming member 173b is bent outward from the clip supporting groove 113b on the inner side of the main body 110 by using a jig (not shown), and the inner surface of the clip seating portion 113a is fitted with the deforming member 173b Make sure that the bent part is in surface contact.

4D, the rotation preventing pin 175 protrudes more than the outer circumference of the main body 110 and can be engaged with the guide groove 25, The rotation preventing portion 170 is deformably engaged with the clip supporting groove 113b and is engaged with the clip supporting groove 113b so that the rotation preventing portion 170 is stably fixed to the main body 110 The fixed state can be maintained.

The operation of the tappet apparatus 100 according to the present invention will now be described with reference to FIGS. 1, 2A, 2B and 7.

When the cam 33 of the camshaft 30 rotates, the cam 33 rotates along the profile of the cam 33 while changing the distance of the profile away from the rotational center axis of the camshaft 30, - As the reciprocating movement is transmitted to the piston (23) in a linear motion and the piston (23) reciprocates with a certain stroke, the fuel can be pressurized by the high pressure pump (20) which is a piston pump. An unillustrated reference numeral 21 designates the housing of the high-pressure pump 20.

Thus, according to the present invention, there is provided a roller tappet device having a clip type anti-rotation member which can reduce a cost by simplifying an operation, can reduce weight, and does not require machining or high precision in a manufacturing process can do.

Further, it is possible to provide a roller tappet device having a clip type rotation preventing member that can maintain the state that the deformable member is elastically deformed and joined to the clip support groove 113b by an external force, thereby improving the reliability of the apparatus.

The tappet apparatus 200 according to another embodiment of the present invention will now be described in detail with reference to FIGS. 5A to 6D.

In the tappet apparatus 100 according to the present embodiment, the configuration related to the main body 110, the roller 130, the roller pin 133, and the bridge 150 is the same as that in the above embodiment, Only the rotation preventing portion 270 will be described.

The manufacturing process for the anti-rotation unit 270 will be described with reference to FIGS. 5A to 5D, and a description of each configuration of the anti-rotation unit 270 is also given.

First, as shown in FIG. 5A, a unit material 273a` for forming the clip body 273a of the rotation preventing portion 270 is provided. Such materials can be provided from a variety of known operations including press operations.

Next, as shown in FIG. 5B, a rotation preventing pin 175 having the same shape as the above-described example in the longitudinal direction is formed on one side by a process such as a pressing operation.

Next, as shown in FIG. 5C, the guide member 279 is bent in a direction in which the rotation preventing pin 275 is protruded from the plate surface so that the clip can be easily engaged with the clip seating portion 113a after the U- .

Next, as shown in Fig. 5D, a deformed slit 273c is formed to mold the deformable member 273b.

Next, as shown in FIGS. 5E and 5F, the rotation preventing portion 270 is bent in a direction of 180 degrees between the deformable member 273b and the rotation preventing pin 275 so that the entire height of the rotation preventing portion 270 becomes a 'U' The member 273b and the rotation preventing pin 275 are connected to each other and the bent portion is referred to as a connecting member 277. [

5F) of the plate-shaped clip body 173a on the inlet side of the 'U' shape has a plate shape (see FIG. 5F) adjacent to the connecting member 277, (See 'W1' in FIG. 5F) of the clip body 173a of the main body 173a.

This is because, when the later-described rotation preventing portion 270 is coupled to the clip seating portion 113a as shown in FIG. 6B, a narrower W2 can maintain a stronger coupling force.

The assembly process of the tappet apparatus 200 according to another embodiment of the present invention will now be described in detail with reference to FIGS. 6A to 6D.

6A and 6B, after the anti-rotation part 270 is positioned on the clip seating part 113a of the main body 110, the U-shape of the anti-rotation part 170 is moved from the top to the bottom Pressure. In this process, the guide member 279 flares outward so as to facilitate engagement with the clip seating portion 113a. FIG. 6C is a view of the state in which the pressurized and coupled state is seen on the side of the deformable member 273b.

Next, when the deforming member 273b is bent toward the clip supporting groove 113b side by bending it from the inside of the main body 110 using a jig (not shown), the deforming member 273b is firmly engaged with the clip supporting groove 113b .

Since the operation process is the same as the above-described example, a detailed description will be omitted below.

On the other hand, a tappet apparatus 300 according to another embodiment of the present invention will be described with reference to FIGS. 8A and 8B.

The tappet apparatus 300 of this embodiment differs from the above-described example in the structure of the main body 110 to which the rotation preventing portion 370 and the rotation preventing portion 370 are coupled.

The rotation preventing portion 370 includes a clip 373 coupled to the main body 110 and a rotation preventing pin 375 provided separately from the clip 373 and engaged with the guide groove 25 to prevent rotation. .

The clip 373 is preferably formed of a plate-shaped material and includes a clip body engaging member 373a coupled to the body 110 and a second engaging member 373a extending from the clip body engaging member 373a, And a clip slit 373c formed by cutting the plate surface so as to be deformable in a state where the rotation prevention pin 375 is coupled to the main body 110 is bent A clip pinion hole 373e penetrating the plate surface so as to protrude into the guide groove 25 by inserting the rotation preventing pin 375 into the center area and the clip latching step 373d formed so as to be hooked behind the clip seat part 313a, .

The rotation preventing pin 375 includes a prevention pin main body 110 formed to protrude to be engaged with the guide groove 25 and a prevention pin rib formed to contact the main body 110 in a plate shape in the prevention pin main body 110 375b. The prevention pin main body 110 may be formed not only from a plate-like material but also from a solid type free from voids through forging or the like.

The tappet apparatus 300 according to the present embodiment having such a configuration is preferably coupled to the main body 110 through the following process.

The rotation preventing pin 375 is positioned so that the portion of the protrusion pin protruded from the main body 110 protrudes outward and the protrusion pin rib 375b contacts the clip fitting portion 313a.

Next, the bent deformable member 373b is inserted into the clip supporting hole 313b so that the prevention pin body 110 protrudes outward. The deformation member 373b protruding toward the bridge 150 inside the main body 110 is bent and the clip latching protrusion 373d around the clip slit 373c is pressed so that the clip latching protrusion 373d is inserted into the clip latching portion 373d, Is deformed using a jig or the like so as to be firmly supported on the inner side of the base 313a.

Although the tappet apparatus 100 according to the present invention has been described as a roller type for operating a high-pressure pump, various types of tappet apparatuses for opening and closing a valve are also applied to the rotation prevention, which is a key technical idea of the present invention Of course.

It is to be understood that the present invention may be embodied in various forms other than the above-described embodiments.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the invention. will be. The scope of the invention will be determined by the appended claims and their equivalents.

100: tappet device 20: high pressure pump
23: piston 25: guide groove
30: camshaft 33: cam
110: main body 113: clip
113a, 313a: clip seating portion 113b, 313b: clip holding groove
115: roller pinhole 130: roller
133: roller pin 150: bridge
153: piston contact member
170, 270, 370: anti-rotation parts 173, 273, 373: clip
173a, 273a, 373a: clip body 173b, 273b, 373b:
173c, 273c, and 373c: deformation slit 175: rotation prevention pin
277: connecting member 279: guide member

Claims (7)

In the roller tappet device,
A body forming an outer appearance;
A roller in contact with the cam of the camshaft and rotatably coupled to the body;
A bridge which traverses the inside of the body and contacts one of the high pressure pumps which supply fuel to the engine;
And a rotation preventing portion engaged with the guide groove of the engine or the high pressure pump to prevent the rotation of the main body in a sliding process that is coupled to the main body and converts the reciprocating motion of the rotational motion of the cam,
The rotation preventing portion may include a clip formed in a plate shape and coupled to the main body, and a rotation preventing pin extending from the clip and engaged with the guide groove,
The rotation preventing portion is integrally formed and bent from a plate-
Wherein the rotation preventing portion includes a connecting member that is integrally formed and is bent to connect the clip and the rotation preventing pin, wherein a distance between the clip and the rotation preventing pin adjacent to the connecting member is spaced apart from the connecting member, Wherein the distance between said clip and said anti-rotation pin is greater than the distance between said clip and said anti-rotation pin. The method according to claim 1,
Wherein the rotation preventing pin is formed in a shape corresponding to the shape of the guide groove. The method according to claim 1,
Wherein the main body is provided with a clip fixing member,
Wherein the clip includes a clip body and a deformable member deformable in the clip body,
And the deformable member is coupled to the clip fixing member so that the clip body is fixed to the clip fixing member. delete delete In the roller tappet device,
A body forming an outer appearance;
A roller in contact with the cam of the camshaft and rotatably coupled to the body;
A bridge which traverses the inside of the body and contacts one of the high pressure pumps which supply fuel to the engine;
And a rotation preventing portion engaged with the guide groove of the engine or the high pressure pump to prevent the rotation of the main body in a sliding process that is coupled to the main body and converts the reciprocating motion of the rotational motion of the cam,
Wherein the rotation preventing portion includes a clip coupled to the body and a rotation preventing pin provided separately from the clip and engaged with the guide groove to prevent rotation,
And the anti-rotation pin is fixed to the body by the clip. The method according to claim 6,
Wherein the clip includes a plate-like material,
A clip main body coupling member coupled to the main body; and a clip preventing portion coupling member extending from the clip main body coupling member and engaged with the rotation preventive pin.

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