阅读说明：本技术 一种新能源汽车电池线束生产的压接装置 (Crimping device of new energy automobile battery pencil production ) 是由 郑洪喜 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种新能源汽车电池线束生产的压接装置,包括支撑机构,支撑机构上端设置有用于对线缆进行输送的送线机构,送线机构一侧设置有用于对线缆进行剪断及剥皮的剪断剥皮机构,远离剪断剥皮机构一侧设置有用于对线缆进行压接的压接机构,送线机构、剪断剥皮机构、压接机构与支撑机构连接。本发明通过送线机构的第一夹持机构、第二夹持机构对线缆进行交替夹持移动,同时通过第一夹持机构、第二夹持机构之间的剪断剥皮机构的切断刀片、剥离刀片对线缆进行切断、表皮剥离,然后送入压接机构,使整个过程自动运行,提高了线束压接的效率,降低了生产成本和人工劳动量。(The invention discloses a crimping device for producing a new energy automobile battery wire harness, which comprises a supporting mechanism, wherein the upper end of the supporting mechanism is provided with a wire feeding mechanism for conveying a cable, one side of the wire feeding mechanism is provided with a cutting and peeling mechanism for cutting and peeling the cable, one side far away from the cutting and peeling mechanism is provided with a crimping mechanism for crimping the cable, and the wire feeding mechanism, the cutting and peeling mechanism and the crimping mechanism are connected with the supporting mechanism. According to the wire harness crimping mechanism, the first clamping mechanism and the second clamping mechanism of the wire feeding mechanism are used for alternately clamping and moving the wire cable, meanwhile, the cutting blade and the stripping blade of the cutting and stripping mechanism between the first clamping mechanism and the second clamping mechanism are used for cutting and stripping the surface of the wire cable, and then the wire cable is fed into the crimping mechanism, so that the whole process is automatically operated, the wire harness crimping efficiency is improved, and the production cost and the labor amount are reduced.)

1. The utility model provides a crimping device of new energy automobile battery pencil production which characterized in that: the cable conveying and peeling device comprises a supporting mechanism, wherein a cable feeding mechanism used for conveying cables is arranged at the upper end of the supporting mechanism, a cutting and peeling mechanism used for cutting and peeling the cables is arranged on one side of the cable feeding mechanism, a crimping mechanism used for crimping the cables is arranged on the side far away from the cutting and peeling mechanism, and the cable feeding mechanism, the cutting and peeling mechanism and the crimping mechanism are connected with the supporting mechanism;

the supporting mechanism comprises a bottom plate, a supporting frame is arranged at the upper end of the bottom plate, and a wire passing pipe is arranged at the front end of the supporting frame;

the wire feeding mechanism comprises a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism are identical in structure, the first clamping mechanism and the second clamping mechanism are arranged on the support frame in parallel at intervals, the first clamping mechanism comprises slide rails which are symmetrically arranged up and down, electric slide blocks are arranged on the slide rails, mounting seats are symmetrically arranged up and down at the front ends of the electric slide blocks, first air cylinders are arranged on the mounting seats, and clamping blocks are arranged at the movable ends of the first air cylinders;

the cutting and peeling mechanism comprises a vertical plate, an electric telescopic rod penetrates through the vertical plate, a sliding frame is arranged at the movable end of the electric telescopic rod, a support ring is arranged at the upper end of the sliding frame, second air cylinders are arranged on the front side and the rear side of the support ring, the movable end of each second air cylinder is inserted into the corresponding support ring and is connected with an arc-shaped clamping plate, a peeling blade is arranged on one side, close to the wire passing pipe, of the arc-shaped clamping plate, and a cutting blade is arranged on the other side face of the arc-shaped clamping plate;

crimping mechanism includes the supporting seat, is provided with the die holder on the supporting seat up end, and the die holder upside is provided with the upper die base, and the upper die base upper end is provided with the third cylinder, and the third cylinder front and back side is provided with the guide post.

2. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the clamping block clamping surface is provided with anti-skid lines, and the anti-skid lines and the clamping block are integrally formed.

3. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: an arc-shaped groove is arranged on the right opposite surface of the clamping block and is arranged right correspondingly.

4. The crimping device for producing the new energy automobile battery wire harness according to claim 2 or 3, characterized in that: the clamping block is welded with the movable end of the first cylinder, and the first cylinder is connected with the mounting seat through a bolt.

5. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the slide rail with support frame screwed connection, electronic slider with slide rail sliding connection.

6. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the mounting seat is connected with the electric sliding block through screws, and a through hole for feeding the connecting head is formed in the supporting frame.

7. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the bottom plate is provided with a sliding groove, and the sliding frame is connected with the bottom plate in a sliding mode.

8. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the sliding frame is welded with the support ring, and the center of the support ring is flush with the clamping center of the clamping block.

9. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the arc-shaped clamping plate is connected with the cutting-off blades through screws, and the cutting-off blades are arranged in a staggered mode.

10. The crimping device for producing the new energy automobile battery wire harness according to claim 1, is characterized in that: the arc-shaped clamping plate is connected with the stripping blade through screws, and the stripping blade is arranged in an aligned mode.

Technical Field

The invention relates to the field of new energy automobile battery wire harness processing, in particular to a crimping device for new energy automobile battery wire harness production.

Background

The wire harness is a wiring piece for connecting various electrical equipment in a circuit, is particularly widely applied, and particularly has larger and larger requirements along with the development of the automobile industry. An automotive harness is a network body of an automotive circuit, and functions by connecting electrical and electronic parts of an automobile, and there is no automotive circuit without a harness. At present, the wiring harness is basically woven into the same form whether the high-grade luxury automobile or the economic common automobile, and consists of electric wires, connectors and wrapping adhesive tapes. The crimping of the terminal connector is needed to be carried out on the end of the wire harness in the machining process of the wire harness, at present, a cable is firstly cut into needed length, rubber is peeled off from the end, then the crimping is carried out by manually holding the cable, so that the whole machining is carried out in multiple steps, the labor intensity of workers is high, the machining efficiency is low, and troubles are caused to production.

Disclosure of Invention

The invention aims to solve the problems and provide a crimping device for producing a battery wire harness of a new energy automobile.

The invention realizes the purpose through the following technical scheme:

a crimping device for producing a new energy automobile battery wire harness comprises a supporting mechanism, wherein a wire feeding mechanism for conveying a cable is arranged at the upper end of the supporting mechanism, a cutting and peeling mechanism for cutting and peeling the cable is arranged on one side of the wire feeding mechanism, a crimping mechanism for crimping the cable is arranged on the side away from the cutting and peeling mechanism, and the wire feeding mechanism, the cutting and peeling mechanism and the crimping mechanism are connected with the supporting mechanism;

the supporting mechanism comprises a bottom plate, a supporting frame is arranged at the upper end of the bottom plate, and a wire passing pipe is arranged at the front end of the supporting frame;

the wire feeding mechanism comprises a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism are identical in structure, the first clamping mechanism and the second clamping mechanism are arranged on the support frame in parallel at intervals, the first clamping mechanism comprises slide rails which are symmetrically arranged up and down, electric slide blocks are arranged on the slide rails, mounting seats are symmetrically arranged up and down at the front ends of the electric slide blocks, first air cylinders are arranged on the mounting seats, and clamping blocks are arranged at the movable ends of the first air cylinders;

the cutting and peeling mechanism comprises a vertical plate, an electric telescopic rod penetrates through the vertical plate, a sliding frame is arranged at the movable end of the electric telescopic rod, a support ring is arranged at the upper end of the sliding frame, second air cylinders are arranged on the front side and the rear side of the support ring, the movable end of each second air cylinder is inserted into the corresponding support ring and is connected with an arc-shaped clamping plate, a peeling blade is arranged on one side, close to the wire passing pipe, of the arc-shaped clamping plate, and a cutting blade is arranged on the other side face of the arc-shaped clamping plate;

crimping mechanism includes the supporting seat, is provided with the die holder on the supporting seat up end, and the die holder upside is provided with the upper die base, and the upper die base upper end is provided with the third cylinder, and the third cylinder front and back side is provided with the guide post.

Further setting: the clamping block clamping surface is provided with anti-skid lines, and the anti-skid lines and the clamping block are integrally formed.

So set up, make press from both sides the cable between the tight piece pair of clamp and carry out the centre gripping fixed, improve the stability of centre gripping.

Further setting: an arc-shaped groove is arranged on the right opposite surface of the clamping block and is arranged right correspondingly.

So set up, make the cable centre gripping between the clamp block pair is in arc wall internal fixation improves the stability of centre gripping.

Further setting: the clamping block is welded with the movable end of the first cylinder, and the first cylinder is connected with the mounting seat through a bolt.

So set up, improve the stability that first cylinder promoted the clamp block.

Further setting: the slide rail with support frame screwed connection, electronic slider with slide rail sliding connection.

So set up, make the slide rail supports the removal of electronic slider is smooth and easy.

Further setting: the mounting seat is connected with the electric sliding block through screws, and a through hole for feeding the connecting head is formed in the supporting frame.

So set up, be convenient for the mount pad is in connection on the electronic slider is fixed.

Further setting: the bottom plate is provided with a sliding groove, and the sliding frame is connected with the bottom plate in a sliding mode.

So set up, make the bottom plate carry out sliding support to the carriage.

Further setting: the sliding frame is welded with the support ring, and the center of the support ring is flush with the clamping center of the clamping block.

So set up, guarantee the braced ring removes the parallel and level through the cable, improves the shearing quality to the cable.

Further setting: the arc-shaped clamping plate is connected with the cutting-off blades through screws, and the cutting-off blades are arranged in a staggered mode.

So set up, be convenient for right cut off the blade with arc clamping plate is connected fixedly, makes cut off the blade and cut off the cable.

Further setting: the arc-shaped clamping plate is connected with the stripping blade through screws, and the stripping blade is arranged in an aligned mode.

By the arrangement, the stripping blade and the arc-shaped clamping plate are conveniently connected and fixed, so that the stripping blade cuts off the skin of the cable.

Compared with the prior art, the invention has the following beneficial effects:

the cable is alternately clamped and moved by the first clamping mechanism and the second clamping mechanism of the wire feeding mechanism, and meanwhile, the cable is cut off and peeled by the cutting blade and the peeling blade of the cutting and peeling mechanism between the first clamping mechanism and the second clamping mechanism, and then the cable is fed into the crimping mechanism, so that the whole process automatically operates, the crimping efficiency of the wire harness is improved, and the production cost and the labor amount are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment 1 of a crimping device for producing a new energy automobile battery wire harness according to the invention;

FIG. 2 is a schematic structural diagram of a crimping device for producing a new energy automobile battery wire harness according to the invention in a front view;

FIG. 3 is a schematic structural diagram of a cutting and peeling mechanism of the crimping device for producing the new energy automobile battery wire harness;

fig. 4 is an exploded structural schematic diagram of a cutting and peeling mechanism of the crimping device for producing the new energy automobile battery harness according to the invention;

fig. 5 is a schematic top cross-sectional structural view of a cutting and peeling mechanism of the crimping device for producing the new energy automobile battery harness according to the invention;

fig. 6 is a schematic structural diagram of a wire feeding mechanism in embodiment 1 of the crimping device for producing a new energy automobile battery wire harness according to the invention;

fig. 7 is a schematic structural diagram of embodiment 2 of the crimping device for producing the new energy automobile battery wire harness according to the invention;

fig. 8 is a schematic structural diagram of a wire feeding mechanism in embodiment 2 of the crimping device for producing a new energy automobile battery wire harness according to the invention.

The reference numerals are explained below:

1. a support mechanism; 11. a base plate; 12. a support frame; 13. a wire passing pipe; 2. a wire feeding mechanism; 21. a first clamping mechanism; 211. a slide rail; 212. an electric slider; 213. a mounting seat; 214. a first cylinder; 215. a clamping block; 216. an arc-shaped slot; 22. a second clamping mechanism; 3. a cutting and peeling mechanism; 31. a vertical plate; 32. an electric telescopic rod; 33. a carriage; 34. a support ring; 35. a second cylinder; 36. an arc-shaped clamping plate; 37. cutting off the blade; 38. stripping the blade; 4. a crimping mechanism; 41. a supporting seat; 42. a lower die holder; 43. an upper die holder; 44. a third cylinder; 45. and a guide post.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be further described with reference to the accompanying drawings in which:

example 1

As shown in fig. 1-6, a crimping device for producing a new energy automobile battery harness comprises a supporting mechanism 1, a wire feeding mechanism 2 for conveying a cable is arranged at the upper end of the supporting mechanism 1, a cutting and peeling mechanism 3 for cutting and peeling the cable is arranged on one side of the wire feeding mechanism 2, a crimping mechanism 4 for crimping the cable is arranged on the side far away from the cutting and peeling mechanism 3, and the wire feeding mechanism 2, the cutting and peeling mechanism 3 and the crimping mechanism 4 are connected with the supporting mechanism 1;

the supporting mechanism 1 comprises a bottom plate 11, a supporting frame 12 is arranged at the upper end of the bottom plate 11, and a wire passing pipe 13 is arranged at the front end of the supporting frame 12 and used for supporting cables entering the device in parallel;

the wire feeding mechanism 2 comprises a first clamping mechanism 21 and a second clamping mechanism 22, the first clamping mechanism 21 and the second clamping mechanism 22 are identical in structure, the first clamping mechanism 21 and the second clamping mechanism 22 are arranged on the support frame 12 in parallel at intervals, the first clamping mechanism 21 comprises slide rails 211 which are arranged in an up-down symmetrical mode and used for supporting the electric slide blocks 212 to move directionally, the electric slide blocks 212 are arranged on the slide rails 211, mounting seats 213 are arranged at the front ends of the electric slide blocks 212 in an up-down symmetrical mode, first air cylinders 214 are arranged on the mounting seats 213 and used for providing clamping power for the clamping blocks 215, and clamping blocks 215 are arranged at the movable ends of the first air cylinders 214 and used for clamping and fixing the wire cables;

the cutting and peeling mechanism 3 comprises a vertical plate 31, an electric telescopic rod 32 penetrates through the vertical plate 31 to provide transverse moving power for a sliding frame 33, the sliding frame 33 is arranged at the movable end of the electric telescopic rod 32, a support ring 34 is arranged at the upper end of the sliding frame 33 and supports and fixes a second air cylinder 35, the front side and the rear side of the support ring 34 are respectively provided with the second air cylinders 35 which provide power for cutting, clamping and peeling cables, the movable end of the second air cylinder 35 is inserted into the support ring 34 and is connected with an arc-shaped clamping plate 36, a peeling blade 38 is arranged on one side, close to the wire through pipe 13, of the arc-shaped clamping plate 36, and a cutting blade 37 is arranged on the other side face of the arc-shaped clamping plate 36;

the crimping mechanism 4 comprises a supporting seat 41, a lower die seat 42 is arranged on the upper end face of the supporting seat 41, an upper die seat 43 is arranged on the upper side of the lower die seat 42, a third cylinder 44 is arranged at the upper end of the upper die seat 43 and used for providing downward pressing power for the upper die seat 43, and guide posts 45 are arranged on the front side and the rear side of the third cylinder 44.

Preferably: anti-skid grains are arranged on the clamping surface of the clamping block 215 and are integrally formed with the clamping block 215, so that the clamping block 215 clamps and fixes the cables between the clamping blocks, and the clamping stability is improved; the clamping block 215 is welded with the movable end of the first air cylinder 214, the first air cylinder 214 is in bolt connection with the mounting seat 213, and the stability of the clamping block 215 pushed by the first air cylinder 214 is improved; the sliding rail 211 is in screw connection with the support frame 12, and the electric sliding block 212 is in sliding connection with the sliding rail 211, so that the sliding rail 211 supports the electric sliding block 212 to move smoothly; the mounting seat 213 is in screw connection with the electric slider 212, and the support frame 12 is provided with a through hole for loading a connecting head, so that the mounting seat 213 is conveniently connected and fixed on the electric slider 212; a sliding groove is arranged on the bottom plate 11, and the sliding frame 33 is connected with the bottom plate 11 in a sliding manner, so that the sliding frame 33 is supported by the bottom plate 11 in a sliding manner; the sliding frame 33 is welded with the support ring 34, the center of the support ring 34 is flush with the clamping center of the clamping block 215, so that the flush movement of the support ring 34 to the passing cable is ensured, and the shearing quality of the cable is improved; the arc-shaped clamping plate 36 is in screw connection with the cutting blade 37, and the cutting blade 37 is arranged in a staggered manner, so that the cutting blade 37 and the arc-shaped clamping plate 36 are conveniently connected and fixed, and the cable is cut by the cutting blade 37; the arc-shaped clamping plate 36 is in screw connection with the stripping blade 38, and the stripping blade 38 is arranged in alignment, so that the stripping blade 38 and the arc-shaped clamping plate 36 are conveniently connected and fixed, and the stripping blade 38 cuts the skin of the cable.

Example 2

As shown in fig. 2-5 and 7-8, the crimping device for producing the new energy automobile battery harness comprises a supporting mechanism 1, wherein a wire feeding mechanism 2 for conveying a cable is arranged at the upper end of the supporting mechanism 1, a cutting and peeling mechanism 3 for cutting and peeling the cable is arranged on one side of the wire feeding mechanism 2, a crimping mechanism 4 for crimping the cable is arranged on the side far away from the cutting and peeling mechanism 3, and the wire feeding mechanism 2, the cutting and peeling mechanism 3 and the crimping mechanism 4 are connected with the supporting mechanism 1;

the supporting mechanism 1 comprises a bottom plate 11, a supporting frame 12 is arranged at the upper end of the bottom plate 11, and a wire passing pipe 13 is arranged at the front end of the supporting frame 12 and used for supporting cables entering the device in parallel;

the wire feeding mechanism 2 comprises a first clamping mechanism 21 and a second clamping mechanism 22, the first clamping mechanism 21 and the second clamping mechanism 22 are identical in structure, the first clamping mechanism 21 and the second clamping mechanism 22 are arranged on the support frame 12 in parallel at intervals, the first clamping mechanism 21 comprises slide rails 211 which are arranged in an up-down symmetrical mode and used for supporting the electric slide blocks 212 to move directionally, the electric slide blocks 212 are arranged on the slide rails 211, mounting seats 213 are arranged at the front ends of the electric slide blocks 212 in an up-down symmetrical mode, first air cylinders 214 are arranged on the mounting seats 213 and used for providing clamping power for the clamping blocks 215, and clamping blocks 215 are arranged at the movable ends of the first air cylinders 214 and used for clamping and fixing the wire cables;

the cutting and peeling mechanism 3 comprises a vertical plate 31, an electric telescopic rod 32 penetrates through the vertical plate 31 to provide transverse moving power for a sliding frame 33, the sliding frame 33 is arranged at the movable end of the electric telescopic rod 32, a support ring 34 is arranged at the upper end of the sliding frame 33 and supports and fixes a second air cylinder 35, the front side and the rear side of the support ring 34 are respectively provided with the second air cylinders 35 which provide power for cutting, clamping and peeling cables, the movable end of the second air cylinder 35 is inserted into the support ring 34 and is connected with an arc-shaped clamping plate 36, a peeling blade 38 is arranged on one side, close to the wire through pipe 13, of the arc-shaped clamping plate 36, and a cutting blade 37 is arranged on the other side face of the arc-shaped clamping plate 36;

the crimping mechanism 4 comprises a supporting seat 41, a lower die seat 42 is arranged on the upper end face of the supporting seat 41, an upper die seat 43 is arranged on the upper side of the lower die seat 42, a third cylinder 44 is arranged at the upper end of the upper die seat 43 and used for providing downward pressing power for the upper die seat 43, and guide posts 45 are arranged on the front side and the rear side of the third cylinder 44.

Preferably: the arc-shaped grooves 216 are arranged on the opposite surfaces of the clamping blocks 215, and the arc-shaped grooves 216 are oppositely arranged, so that the cables between the pairs of clamping blocks 215 are clamped and fixed in the arc-shaped grooves 216, and the clamping stability is improved; the clamping block 215 is welded with the movable end of the first air cylinder 214, the first air cylinder 214 is in bolt connection with the mounting seat 213, and the stability of the clamping block 215 pushed by the first air cylinder 214 is improved; the sliding rail 211 is in screw connection with the support frame 12, and the electric sliding block 212 is in sliding connection with the sliding rail 211, so that the sliding rail 211 supports the electric sliding block 212 to move smoothly; the mounting seat 213 is in screw connection with the electric slider 212, and the support frame 12 is provided with a through hole for loading a connecting head, so that the mounting seat 213 is conveniently connected and fixed on the electric slider 212; a sliding groove is arranged on the bottom plate 11, and the sliding frame 33 is connected with the bottom plate 11 in a sliding manner, so that the sliding frame 33 is supported by the bottom plate 11 in a sliding manner; the sliding frame 33 is welded with the support ring 34, the center of the support ring 34 is flush with the clamping center of the clamping block 215, so that the flush movement of the support ring 34 to the passing cable is ensured, and the shearing quality of the cable is improved; the arc-shaped clamping plate 36 is in screw connection with the cutting blade 37, and the cutting blade 37 is arranged in a staggered manner, so that the cutting blade 37 and the arc-shaped clamping plate 36 are conveniently connected and fixed, and the cable is cut by the cutting blade 37; the arc-shaped clamping plate 36 is in screw connection with the stripping blade 38, and the stripping blade 38 is arranged in alignment, so that the stripping blade 38 and the arc-shaped clamping plate 36 are conveniently connected and fixed, and the stripping blade 38 cuts the skin of the cable.

The working principle and the using process of the invention are as follows: the cable passes through the wire guide 13, the cable is clamped and fixed through the first clamping mechanism 21 of the wire feeding mechanism 2, the sliding frame 33 is driven to move through the electric telescopic rod 32 of the cutting and peeling mechanism 3, the support ring 34 is sleeved on the outer diameter of the head of the cable, the arc-shaped clamping plate 36 moves relatively through the work of the second air cylinder 35, the cable head is cut off through the cutting blade 37, the peeling blade 38 cuts off the sheath of the cable, then the electric telescopic rod 32 moves reversely to peel off the sheath of the cable, the electric slider 212 of the first clamping mechanism 21 moves towards the second clamping mechanism 22, the cable with the stripped end of the cable is clamped and moved through the second clamping mechanism 22, the cable is moved to the lower die seat 42 of the crimping mechanism 4 and inserted into the connector, and the cable and the connector are fixed in a crimping mode through the downward pressing of the upper die seat 43.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.