KR101435765B1 - Jig for drilling - Google Patents

Abstract

The invention relates to a jig for drilling and, more specifically, to a jig for drilling which allows the users to crush and remove a component which remains broken and sunken in a cylinder head of vehicle, such as an injector or a preheating plug. The jig for drilling of the invention comprises a jig which has an injector hole, a preheating plug hole, and a fixing bolt hole at each corresponding position with corresponding size of the injector, the preheating plug, and the fixing bolt formed on the cylinder head of vehicle, respectively; a first to third guiding units in which a hollow drill guiding unit is formed and some of a lower portion is inserted and fixed to the injector hole, the preheating plug hole, and the fixing bolt hole of the jig unit to be matched, respectively; and a supporting bolt to fix and to support between the cylinder head and the jig, wherein a supporting bolt hole for inserting the supporting bolt can be formed in an end of the jig.

Description

Jig for drilling}

The present invention relates to a jig for drilling, and more particularly, to a jig for drilling, more particularly, to a jig for drilling when it is desired to grind and remove parts residues such as an injector or a preheating plug which are broken in a cylinder head of a vehicle, To a jig for drilling work.

The injector injects a precise amount of fuel to the combustion chamber at a precise timing according to the signal from the ECU. The injector is equipped with as many cylinders as the number of cylinders.

Such an injector exists in a wide variety of forms depending on the manufacturer, type of vehicle, fuel type, and the like. FIG. 1 shows one kind of injector.

1 is an exemplary view showing a conventional injector.

1, the conventional injector 100 includes a head portion 110 having a fuel pipe 112 connected to a fuel supply pipe or a fuel return pipe, A neck portion 120 formed to have a small diameter and an embedding portion 130 embedded in the combustion chamber side through engagement with the cylinder head. The embedded injector 100 can be firmly fixed to the cylinder head via a separate fixing bolt (not shown) or the like, and a preheating plug (not shown) is disposed adjacent to the cylinder head Lt; / RTI >

A bolt type thread is formed on the head upper part 114 constituting the upper end of the head part 110 and a fuel injecting part 135 is formed on the lower end of the embedding part 130. [

The injector 100 is firmly fixed through a hole formed in the cylinder head and an interference fit type. In particular, when the vehicle is driven for a long time, the fixation tends to be more secure due to carbides formed in the course of combustion of the fuel.

Such fixation can also occur in the preheating plug and the fixing bolt adjacent to the injector. In the case where the fixation occurs, when cutting off the injector 100 for repair or maintenance of the vehicle, .

When the injector 100 is cut into the cylinder head as described above, it is difficult to remove the injector 100. In the case of drilling for removing the cylinder head, And the like.

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a jig for drilling work that can conveniently and effectively remove a damaged part so that secondary damage does not occur in a vehicle when an injector or a preheating plug on the cylinder head is damaged.

Korean Patent No. 10-1362229 (titled "tab or drill jig")

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for dismantling parts, such as an injector, a preheating plug, And to provide a jig for drilling work.

In order to achieve the above object, the jig for drilling work according to the present invention is characterized in that an injector hole, a preheating plug hole, and a fixing bolt hole corresponding to positions and sizes of an injector, a preheating plug and a fixing bolt provided on a cylinder head of a vehicle are formed A jig unit; First to third guide units each having a hollow drill guide portion and a portion of a lower portion corresponding to the injector hole, the preheating plug hole, and the fixing bolt hole of the jig unit, respectively; And a support bolt for fixedly supporting the cylinder head and the jig unit, wherein a support bolt hole into which the support bolt can be inserted may be formed at one end of the jig unit.

The first to third guide units each include a body lower part inserted into the injector hole, the preheating plug hole, and the fixing bolt hole; And an upper body integrally formed with the lower portion of the body and engageable with the upper opening surface of the injector hole, the preheating plug hole, and the fixing bolt hole, respectively.

In this case, corresponding engageable threads can be formed on at least a part of the outer circumferential surface of the body bottom and the corresponding inner circumferential surface of the injector hole, the preheating plug hole and the fixing bolt hole of the jig unit.

At this time, the first to third guide units may be configured in two or more shapes having different combinations of inner diameters or heights corresponding to the sizes of two or more working drills or two or more working heights.

The jig unit provided in the drilling work jig of the present invention may further include a fuel pipe hole corresponding to the position of the fuel pipe provided in the injector so as to communicate with the injector hole.

Further, the present invention may further include a plug member corresponding to each of the injector hole, the preheating plug hole, and the fixing bolt hole of the jig unit.

According to the drill work jig of the present invention, when a drill operation is required by cutting due to fixation of parts such as an injector and a preheating plug coupled to a cylinder head of a vehicle, it is possible to easily and safely remove them through a precision drill operation .

As a result, it is possible to prevent the occurrence of secondary damage due to an inaccurate drilling operation, as well as to greatly reduce the cost and time required for maintenance or repair of the vehicle.

1 is an exemplary view showing a conventional injector.
FIG. 2 is a view showing a jig for drilling work according to an embodiment of the present invention.
Fig. 3 is an explanatory view showing an actual use example of the drilling work jig of Fig. 2;

The objects, features and advantages of the present invention will become more apparent through the following examples.

The following specific structural or functional descriptions are merely illustrative for purposes of describing an embodiment according to the inventive concept, and it is to be understood that the embodiments according to the inventive concept may be embodied in various forms, It should not be construed as limited to the embodiments.

The embodiments according to the concept of the present invention can make various changes and have various forms, so that specific embodiments are described in detail in the specification or the drawings. It should be understood, however, that the embodiments according to the concept of the present invention are not intended to be limited to any particular mode of disclosure, but include all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

It is to be understood that the terms such as " comprises "or" having "in this specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 2 is a view showing a jig for drilling work according to an embodiment of the present invention, and FIG. 3 is an explanatory view showing an actual use example of the jig for drilling work of FIG.

2 and 3, it can be seen that the jig for drilling according to an embodiment of the present invention includes the jig unit 210 and the guide units 220, 230, and 240, and the like.

The jig unit 210 includes an injector hole 212, a preheating plug hole 214, and a fixing bolt hole 216 (corresponding to the position and size of the injector, the preheating plug, and the fixing bolt, And the like, and the respective components and the respective holes 212, 214, and 216 are positioned on the cylinder head 260 so as to correspond exactly to each other.

In other words, when at least one of the injector, the preheating plug, or the fixing bolt exists in a state of being recessed in the cylinder head 260 due to cutting or the like, the jig unit (210) as shown in FIG.

The guide units 220, 230 and 240 corresponding to the parts which are cut and recessed are inserted into the holes 212, 214 or 216 and then the drill holes 226, 236, and 246, respectively.

Therefore, the guide unit has the first guide unit 220, the second guide unit 230 and the third guide unit 240 (corresponding to the injector hole 212, the preheating plug hole 214 and the fixing bolt hole 216) May be separately provided.

The guide units 220, 230, and 240 may include body bottom portions 224, 234, and 244 to which the holes 212, 214, and 216 are inserted, holes 212 and 214, 232 and 242 formed to be engageable with the peripheral opening of the upper opening of the bushing 216 and drill holes 226, 236 and 246 for guiding the drill bit. At this time, the outer circumferential diameters of the lower portions 224, 234, and 244 of the respective bodies are configured to be in close contact with the inner diameters of the corresponding holes 212, 214, and 216 so that the insertion of the lower portions 224, 234, It may be desirable to be configured such that stable fixing of a certain level or more can be ensured. Or at least a part of the inner circumferential surface of each of the holes 212, 214, 216 formed in the jig unit 210, at least a part of the outer circumferential surfaces of the lower portions 224, 234, 244 of the guide units 220, 230, and 240 and the jig unit 210 by screwing the threads of the guide units 220, 230, and 240 through threading.

Further, in the case where a drilling operation is required through the injector hole 212, for example, the preheating plug hole 214 and the fixing bolt hole 216 are provided with a stopper member (not shown) (Not shown) so that the upper opening surface can be closed.

In other words, since the stopper members having the sizes corresponding to the respective holes 212, 214, and 216 are provided, when the drilling operation is progressed in the other holes, It is good that the hole can be closed.

At this time, if drilling is required only for some parts, for example, the preheating plug, it is natural that a partial drilling operation can be performed without removing the injector and the like. In other words, if a selective drilling operation on an injector or a preheating plug or the like is required, the remaining parts can be exposed through the holes 212, 214 or 216 without detachment, and then drilling can be performed only on necessary parts .

The jig unit 210 provided in the drilling work jig according to the embodiment of the present invention includes a support bolt 250 for supporting the jig unit 210 to be firmly supported by the cylinder head 260, A bolt hole 218 may be additionally provided.

In other words, if the drilling operation can not be precisely and precisely performed, there is a danger that the cylinder head or other peripheral parts may be damaged, and this damage may lead to a large failure, Is a very important problem.

Accordingly, the jig unit 210 applied to the embodiment of the present invention has the support bolt hole 218 into which at least one support bolt 250 can be inserted, So that it is possible to securely perform the drilling operation more stably. A washer 255 and the like may be additionally provided between the support bolt 250 and the support bolt hole 218 as shown in the figure. However, in the embodiment of the present invention shown in the figure, only two supporting bolts 250 are provided and corresponding supporting bolt holes 218 are formed. However, the present invention is not limited thereto, It is of course no matter what configuration is employed to enable stable fixation of the jig unit 210 through the provision of one or more support bolts 250.

1, the head 110 of the injector may be provided with a fuel pipe 112 having a use such as a fuel supply pipe or a return pipe. Accordingly, the jig unit according to the embodiment of the present invention, A fuel pipe hole 213 corresponding to the fuel pipe hole 210 may be additionally formed.

That is, in consideration of the structure of the injector, the fuel pipe hole 213 may be provided so as to be adjacent to the injector hole 212, and more preferably, the injector hole 212 and the fuel pipe hole 213 may communicate with each other May be better.

In this case, it is needless to say that a plug member corresponding to the fuel tube hole 213 may be provided separately or the plug member for the injector hole may be configured to be capable of being closed to the fuel tube hole 213. [

In addition, the first to third guide units 220, 230, and 240, which are applied to the embodiment of the present invention, may be configured in various shapes having different combinations of inner diameters or heights, .

In other words, in order to allow the application of drill blades having various sizes in consideration of the shape of the parts or recesses of the parts embedded in the cylinder head, or to enable adjustment of the working height, It is possible to provide guide units 220, 230 and 240 applicable to various types of drill holes 226, 236 and 246 with various combinations of sizes and various heights.

Thus, it is possible to provide an additional advantage that not only the operator's convenience can be improved, but also a more precise and precise drilling operation can be performed. However, it should be understood that the present invention is not necessarily limited thereto.

As described above, the drill working jig according to the embodiment of the present invention can be used in any state of a state in which the cylinder head is mounted on a vehicle or in a separated state, and a cover for protecting the cylinder head Can be used in all situations in a separate or non-isolated state.

It has been described above that the drill work jig can function to perform selective drilling operation only on necessary parts in a state where some parts are attached.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

210: jig unit 212: injector hole
213: fuel tube hole 214: preheating plug hole
216: Fixing bolt hole 218: Support bolt hole
220: first guide unit 230: second guide unit
240: third guide unit 250: support bolt

Claims (6)

delete A jig unit having an injector hole, a preheating plug hole, and a fixing bolt hole respectively corresponding to positions and sizes of the injector, the preheating plug, and the fixing bolt provided on the cylinder head of the vehicle;
First to third guide units each having a hollow drill guide portion and a portion of a lower portion corresponding to the injector hole, the preheating plug hole, and the fixing bolt hole of the jig unit, respectively; And
And a support bolt for fixedly supporting between the cylinder head and the jig unit,
A support bolt hole into which the support bolt can be inserted is formed at one end of the jig unit,
Each of the first to third guide units includes a body lower part inserted into the injector hole, the preheating plug hole, and the fixing bolt hole; And
And a body upper part integrally formed with the lower part of the body and engageable with the upper opening surface of the injector hole, the preheating plug hole, and the fixing bolt hole.
3. The method of claim 2,
Wherein at least a part of the outer circumferential surface of the body lower portion and the corresponding inner circumferential surface of the injector hole, the preheating plug hole and the fixing bolt hole of the jig unit are formed with threadably engageable threads.
A jig unit having an injector hole, a preheating plug hole, and a fixing bolt hole respectively corresponding to positions and sizes of the injector, the preheating plug, and the fixing bolt provided on the cylinder head of the vehicle;
First to third guide units each having a hollow drill guide portion and a portion of a lower portion corresponding to the injector hole, the preheating plug hole, and the fixing bolt hole of the jig unit, respectively; And
And a support bolt for fixedly supporting between the cylinder head and the jig unit,
A support bolt hole into which the support bolt can be inserted is formed at one end of the jig unit,
Wherein the first to third guide units are formed in two or more shapes having different combinations of inner diameters or heights so as to correspond to sizes of two or more work drills or work heights of two or more.
5. The method according to any one of claims 2 to 4,
And a fuel pipe hole corresponding to a position of the fuel pipe provided in the injector so as to communicate with the injector hole.
6. The method of claim 5,
Further comprising a plug member corresponding to an injector hole, a preheating plug hole, and a fixing bolt hole of the jig unit, respectively.

Images