KR101577973B1 - Inflator of the heavy-duty tire - Google Patents

Abstract

The present invention relates to an inflator for a heavy-duty tire, and more specifically, to an inflator for a heavy-duty tire for rapidly injecting high-pressure air into a heavy-duty tire mounted on a bus, truck, or the like. According to the present invention, the inflator for a heavy-duty tire comprises: a frame installed on a conveyor of a tire assembly line; a wheel pressurizing unit interlinked with and elevated by the operation of a first hydraulic cylinder installed in the center of the top of the frame to pressurize and seal the top surface of a wheel; an inflator dome installed on the outside at the bottom of the wheel pressurizing unit and interlinked with and elevated by the operation of a second hydraulic cylinder installed on one side of the top of the frame to pressurize the top bead unit of the heavy-duty tire and to be separated from the wheel to inject air into the heavy-duty tire; a clamping unit combined with the external side of a first, a second, and a third shaft penetrating the frame and operated by oil pressure to fixate or release the first, the second, and the third shaft; and a centering unit installed in a position corresponding to the wheel pressurizing unit to be close to the internal side surface of the conveyed wheel and to match the wheel with the center of the wheel pressurizing unit. The inflator dome is combined with the bottom end of the third shaft elevated by the operation of the second hydraulic cylinder and has a groove on the bottom circumference inside and one or more air inlets on the bottom circumference outside to be connected to the groove.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a large-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large tire inflator, and more particularly, to a large tire inflator capable of rapidly injecting high-pressure air into a large tire mounted on a bus, a truck, or the like.

Generally, a tire inflator refers to a device used to inflate air within a tire within a tire coupled to a wheel in a tire assembly line in a short time.

In particular, in the case of the tire inflator, a tire coupled to a wheel is pressed to inject air through a gap formed between the tire and the wheel.

One example of such a technique is disclosed in Document 1 below.

The following Patent Document 1 discloses a frame mounted on a vehicle tire work space; An air tank mounted on the frame and supplying air to be injected into the tire; A dome switching cylinder member mounted on an upper end of the frame and operated upon changing specifications of the tire; A first inflator dome fixed to an upper end of the frame to inject air into the tire; The first inflation dome being disposed outside the first inflator dome so as to be able to move up and down according to operation of the dome switching cylinder member so as to be positioned outside the first inflator dome when the cylinder member does not operate, A second inflator dome mounted in the upper portion of the first inflator dome to inject air into the tire through the first inflator dome only during operation of the dome switching cylinder member; And a lifter mounted on the lower side of the frame for selectively urging the tire upward to inflate the first inflator dome and the second inflator dome, the tire inflation device comprising: A center cone inserted into a hub hole of the tire wheel to correct a position of the tire, And a lifter sensor mounted on the lifter for sensing a lifting position of the lifter at a position close to the lifter.

When the specification of the tire is determined to be applicable to the first inflator dome, the dome switching cylinder is operated to move the second inflator dome to the upper side of the first inflator dome. When the specification of the tire is determined to be applicable to the second inflator dome, the operation of the dome switching cylinder causes the second inflator dome to be positioned outside the first inflator dome. Then, the lifter is operated to move the tire upward so as to be brought into close contact with any one of the site wall of the tire and the first and second inflator dome so that air is injected.

However, the conventional technique as described above is merely a device applied to a general tire in which air pressure of about 40 to 45 psi is installed by being mounted on a passenger car or the like, and the conventional technology has a large size and a large weight When applied to a large tire, the center cone, which is inserted in the hub hole of the wheel to correct the position of the tire, and the support table that supports the wheel are greatly reduced in bearing capacity due to the tire load, The damping force of the dome is decreased, and the sealing effect is greatly reduced. Therefore, there is no technology for a large-sized tire-type inflator in which air pressure of about 100-120 psi is injected.

Korean Patent Registration No. 10-0610785 (Registered on August 2, 2006)

The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a tire for a large-sized tire mounted on a bus, a truck, The present invention provides a large-sized tire inflator which is capable of injecting air into a space created by pressing a portion of a tire.

It is another object of the present invention to provide a large-sized tire inflator capable of greatly increasing the supporting force for a large-sized heavy-duty tire while greatly improving the supporting force against the shaft when injecting high-

According to an aspect of the present invention, there is provided a large tire inflator comprising: a frame installed on a conveyor of a tire assembly line; A wheel pressurizing unit that is interlocked with the first hydraulic cylinder installed at the upper center of the frame to be vertically moved up and down to press and seal the upper surface of the wheel; And the upper bead portion of the large tire is spaced apart from the wheel so that air is injected into the large tire by being vertically moved up and down according to the operation of the second hydraulic cylinder installed on the upper side of the frame, An inflator dome; A clamping unit coupled to the outer sides of the first, second, and third shafts passing through the frame and operated by hydraulic pressure to fix and unlock the first, second, and third shafts; And a centering unit installed at a position corresponding to the wheel pressing unit and brought into close contact with the inner surface of the wheel to be transferred, so that the wheel is aligned with the center of the wheel pressing unit; The inflator dome is coupled to a lower end of a third shaft that is lifted and lowered according to the operation of the second hydraulic cylinder, and has a groove formed at an inner lower portion thereof and at least one air inlet is formed to communicate with the groove. .

As described above, the large-sized tire inflator according to the present invention has the effect of greatly shortening the assembling time of a large-sized tire and greatly improving the working environment in a situation where there is no inflator technology for a large-sized tire.

In addition, there is an effect of greatly improving the supporting force for the high-load large-sized tire and improving the supporting force against the shaft when injecting high-pressure air into the large tire, thereby preventing the inflator dome from flowing.

1 is a front view showing a large tire inflator according to the present invention;
2 is an enlarged view of a main portion of a large tire inflator according to the present invention.
3 is a view showing air infusion of a tire by a large tire inflator according to the present invention.
4 is a sectional view showing a clamping unit of a large tire inflator according to the present invention.
5 is an enlarged view of a centering unit of a large tire inflator according to the present invention.
6 is a plan view showing a state before operation of the centering unit according to the present invention.
7 is a plan view showing a state after operation of the centering unit according to the present invention.

A large tire inflator according to the present invention comprises: a frame installed on a conveyor of a tire assembly line; A wheel pressurizing unit that is interlocked with the first hydraulic cylinder installed at the upper center of the frame to be vertically moved up and down to press and seal the upper surface of the wheel; And the upper bead portion of the large tire is spaced apart from the wheel so that air is injected into the large tire by being vertically moved up and down according to the operation of the second hydraulic cylinder installed on the upper side of the frame, An inflator dome; A clamping unit coupled to the outer sides of the first, second, and third shafts passing through the frame and operated by hydraulic pressure to fix and unlock the first, second, and third shafts; And a centering unit installed at a position corresponding to the wheel pressurizing unit and closely attached to the inner surface of the wheel to be conveyed to align the wheel with the center of the wheel pressurizing unit.

The wheel pressing unit includes a first shaft that is vertically coupled to the upper center of the frame, a plurality of second shafts coupled to one side of the upper portion of the frame and interlocked with the first shaft, And a plate coupled to the lower end of the second shaft by a bolt to press the upper surface of the wheel, and a pad made of urethane bonded to the lower portion of the holder.

Further, the inflator dome is coupled to the lower end of the third shaft which is moved up and down according to the operation of the second hydraulic cylinder, and a groove is formed around the inner lower portion and at least one air inlet is formed to communicate with the groove .

In addition, the clamping unit may include a housing having a through hole formed at the center thereof and having a spring incorporated in a space portion communicated with the through hole, and a hydraulic injection port communicating with one side of the space portion so as to inject hydraulic pressure; A first slider that is elastically supported by the spring and is vertically reciprocated by hydraulic pressure injected through the hydraulic injection port and has a sloped surface formed on one side thereof and a sloped surface corresponding to the sloped surface of the first slider, And a second slider which is slidably transferred to the left and right along with the transfer of the slider.

The centering unit includes a circular support head supported by a plurality of vertically installed columns and on which a wheel is seated, a support plate installed on an upper portion of a base disposed on the same center line as the support head, Four clamp jigs which are respectively slidably operated by a plurality of LM guides provided so as to face each other on the upper portion of the plate and are tightly fixed to the inner surface of the wheel and a pinion which is connected to the lower portion of the clamp jig, And a hydraulic cylinder connected to the end of the rack for reciprocating the rack.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front view showing a large-sized tire inflator according to the present invention, FIG. 2 is an enlarged view of a main portion of a large-sized tire inflator according to the present invention, 4 is a cross-sectional view showing a clamping unit of a large tire inflator according to the present invention, FIG. 5 is an enlarged view of a centering unit of a large tire inflator according to the present invention, and FIG. 6 is a plan view showing a state before the centering unit according to the present invention is operated, and FIG. 7 is a plan view showing a state after the centering unit according to the present invention is operated.

1 to 4, a large tire inflator according to the present invention includes a frame 1, a wheel pressing unit 2, an inflator dome 3, a clamping unit 4, and a centering unit 5 do.

The large-sized tire inflator of the present invention is installed on a conveyor on which a large-sized wheel 6 and a tire 7 are fed in a large tire assembly line, and automatically feeds, elevates and retracts by data input to a controller (not shown) .

The frame 1 comprises a vertical frame erected vertically on both sides and a horizontal frame horizontally connected to the upper portion of the vertical frame. And a table 13 on which the first and second hydraulic cylinders 11 and 12 are supported is disposed above the horizontal frame.

The wheel pressing unit 2 is interlocked with the first hydraulic cylinder 11 installed at the center of the upper part of the frame 1 to be elevated and lowered to pressurize and seal the upper surface of the wheel 6.

The wheel pressing unit 2 includes a first shaft 21 movably coupled to an upper center of the frame 1 and a second shaft 21 coupled to one side of the upper portion of the frame 1, A plurality of second shafts 22 interlocked with each other and a plate 23 coupled to the lower ends of the first and second shafts 21 and 22 by a bolt, And a pad 25 made of urethane bonded to the lower portion of the holder 24.

The first shaft 21 is vertically connected to the first hydraulic cylinder 11 to serve as a center shaft through a horizontal frame of the frame 1 and the second shaft 22 is connected to the first A plurality of shafts 21 are provided around the shafts 21 so as to be interlocked with the first shafts 21 when the first shafts 21 move up and down to reinforce the supporting force of the wheel presser unit 2 and the inflator dome 3 do.

The plate 23 has a circular shape and is fixed by fastening a bolt to the lower ends of the first and second shafts 21 and 22 and inserted into the holder 24 to fasten the bolts, (Not shown). The pad 25 is preferably made of a urethane material so as to be fixed by fastening a bolt to the lower portion of the holder 24 and to prevent damage when the wheel 6 is pressed. In particular, the plate 23, the holder 24, and the pad 25 are all disposed inside the inflator dome 3.

The inflator dome 3 is installed outside the lower portion of the wheel pressing unit 2 and is linked to the elevated tire 7 in accordance with the operation of the second hydraulic cylinder 12 installed on the upper side of the frame 1, So that air is injected into the large-sized tire 7 by separating the upper bead portion from the wheel 6.

The inflator dome 3 is supplied with air from an air tank (not shown) provided outside the inflator device to be injected into the large tire 7, 3 shaft 31 by fastening a bolt to the lower end thereof.

The inflator dome 3 is coupled to a lower end of a third shaft 31 which is moved up and down according to the operation of the second hydraulic cylinder 12, and a groove 32 is formed around an inner lower portion thereof. And an air inlet 33 is formed to communicate with the groove 32.

An inflow space is generated between the holder 24 and the pad 25 of the wheel pressing unit 2 located inside the inflator dome 3 as the groove 32 is formed and injected through the air inlet 33 Air is introduced into the inflow space. That is, the inflator dome 3 communicates the inflow space with the space between the large wheel 6 and the upper bead of the tire 7, and air is injected into the large tire 7.

The clamping unit 4 is coupled to the outside of the first, second, and third shafts 21, 22, 31 passing through the frame 1 and is operated by hydraulic pressure, , 22, 31).

The clamping unit 4 has a through hole 411 formed at its center and a spring 413 is embedded in a space 412 formed to communicate with the through hole 411, A housing 41 in which a hydraulic injection port 414 is formed so as to be injected into the space portion 412 and a resiliently supported portion of the spring 413 by a hydraulic pressure injected through the hydraulic injection port 414 A first slider 42 which is reciprocated vertically and has a slope 421 formed on one side thereof and a slope 431 corresponding to the slope 421 of the first slider 42, And a second slider 43 slidably moved along with the feeding of the second slider 42.

The clamping unit 4 configured as described above keeps the first and second and third shafts 21, 22 and 31 freely elevated and freed from each other and the wheel pressing unit 2 and the inflator dome 3 The first, second, and third shafts 21, 22, and 31 are fixed.

The first slider 42 inserted into the space portion 412 is slid downward while the second slider 43 is separated from each shaft and is fixed Is released.

When the wheel pressurizing unit 2 and the inflator dome 3 are operated, when the hydraulic pressure introduced into the space portion 412 through the hydraulic inlet 414 is discharged to the outside, the first slider 42 is elastically The first slider 42 is slid upward and the second slider 43 is tightly fixed to the shafts at the same time as the supporting spring 413 is restored to its original state.

As described above, when the high pressure air is injected into the large tire by the clamping unit 4, the supporting force against the shaft is improved to prevent the inflator dome 3 from flowing, thereby greatly improving the sealing effect.

The centering unit 5 is installed at a position corresponding to the wheel pressing unit 2 and is brought into close contact with the inner surface of the wheel 6 to be conveyed so that the wheel 6 is aligned with the center of the wheel pressing unit 2 .

5 to 7, the centering unit 5 includes a circular support head 51 supported by a plurality of vertically installed columns 511 and having a wheel 6 mounted thereon, A support plate 53 provided on an upper portion of a base 52 disposed on the same center line as the support head 51 and a plurality of LM guides 54 provided opposite to each other above the support plate 53 Four clamp jigs 55 each of which is slidably operated and tightly fixed to the inner surface of the wheel 6 and a pinion 56 connected to the lower portion of the clamp jig 55 and provided at the center of the support plate 53 And a hydraulic cylinder 58 connected to the end of the rack 57 for reciprocatingly moving the rack 57. The rack 57 has a plurality of racks 57,

A support 551 of the clamp jig 55 is vertically positioned inside the support head 51 and the clamp jig 55 is horizontally installed at the upper end of the support 551, do.

The clamp jig 55 is composed of a total of four sets, of which one or two sets are arranged to the left and the remaining three sets to be reciprocally transported to the right. A contact pad 552 made of a urethane material having a curved surface corresponding to the inner circumferential surface of the wheel 6 is fixed to the end of the clamp jig 55. The contact pad 552 is in close contact with the inner circumferential surface of the wheel 6 Thereby preventing the surface of the wheel 6 from being damaged.

A connection bracket 553 for connecting two clamp jigs 55 to each other is fixed to the lower end of the support table 551. The connection bracket 553 is coupled to the upper portion of the LM guide 54, 54).

That is, when the wheel 6 is seated on the upper portion of the support head 51, a plurality of hydraulic cylinders 58 mounted in correspondence with each other are operated and each rack 57 connected to the hydraulic cylinder 58 is driven And the clamp jig 55 is transferred by the LM guide 54 to be brought into close contact with the inner circumferential surface of the wheel 6 so that the wheel 6 is pressed against the wheel pressing unit 2, And the wheel 6 is fixed so as not to move.

Hereinafter, the operation of the large tire inflator according to the present invention will be described.

First, when a large-sized wheel 6 and a tire 7 are assembled in a tire assembly line and transferred to the upper portion of the centering unit 5 of the large tire inflator, the operation of the centering unit 5 causes the wheel 6 to be pressed Is fixed to the center of the unit (2) while the wheel (6) is not moved.

The first shaft 21, the second shaft 22 and the third shaft 31 are lowered by the operation of the first hydraulic cylinder 11 so that the wheel pressing unit 2 and the inflator dome 3 are also interlocked . At this time, the wheel pressing unit 2 first operates to press the upper surface of the wheel 6 to seal it.

Thereafter, the third shaft 31 is lowered again by the operation of the second hydraulic cylinder 12, and the inflator dome 3 is lowered interlocked to press the upper bead portion of the large tire 7.

The space between the inflator dome 3 and the holder 24 of the wheel pressing unit 2 and the pad 25 formed between the space formed by the inflator dome 3 and the upper bead portion of the large- Air is injected through the air inlet 33 in the state where the inflow spaces are communicated with each other, and the air is supplied into the large-sized tire 7.

Particularly, the clamping unit 4 is operated to press the upper bead portion of the large tire 7 by the inflator dome 3 while the wheel 6 is pressed and closed by the wheel pressing unit 2, 21, the second shaft 22 and the third shaft 31 are fixed.

When the inflation of the large tire 7 is completed, the wheel pressurizing unit 2, the inflator dome 3 and the clamping unit 4 return to their original state and the large tire 7 is transferred to the next process.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many obvious changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

1: frame
11: First hydraulic cylinder
12: Second hydraulic cylinder
13: Table
2: Wheel pressure unit
21: First shaft
22: Second shaft
23: Plate
24: Holder
25: Pad
3: Inflatable dome
31: Third shaft
32: Groove
33: air inlet
4: Clamping unit
41: Housing
411: through hole, 412: space portion, 413: spring, 414: hydraulic inlet
42: first slider
421:
43: a second slider
431:
5: Centering unit
51: Support head
511: Color
52: Base
53: Support plate
54: LM Guide
55: Clamp jig
551: support, 552: contact pad, 553: connection bracket
56: Pinion
57: Rack
58: Hydraulic cylinder
6: Wheel
7: Large tires

Claims (5)

A frame (1) installed on a conveyor of a tire assembly line;
A wheel pressurizing unit 2 for interlocking up and down according to the operation of the first hydraulic cylinder 11 installed at the upper center of the frame 1 to pressurize and seal the upper surface of the wheel 6;
The second hydraulic cylinder 12 installed at the lower side of the wheel pressing unit 2 and driven by the second hydraulic cylinder 12 installed at one side of the frame 1 presses the upper bead of the large tire 7, An inflator dome 3 for allowing air to be injected into the large-sized tire 7 by being spaced apart from the inflator 6;
The first, second, and third shafts 21, 22, 31 are coupled to the outside of the first, second, and third shafts 21, 22, 31 passing through the frame 1, And a clamping unit (4) for releasing the clamping unit;
And a centering unit 5 installed at a position corresponding to the wheel pressing unit 2 and brought into close contact with an inner surface of the wheel 6 to be transferred to match the wheel 6 to the center of the wheel pressing unit 2 ;
The inflator dome 3 is coupled to a lower end of a third shaft 31 which is moved up and down according to the operation of the second hydraulic cylinder 12, and a groove 32 is formed around an inner lower portion thereof. And an air inlet (33) is formed in communication with the groove (32).
The wheel pressing apparatus according to claim 1, wherein the wheel pressing unit includes: a first shaft that is vertically coupled to an upper center of the frame; and a second shaft coupled to one side of the upper portion of the frame, A plurality of second shafts 22 interlocked with the shafts 21 and a plate 23 coupled to the lower ends of the first shafts 21 and the second shafts 22, And a pad (25) made of urethane bonded to the lower portion of the holder (24).
delete The clamping unit according to claim 1, wherein the clamping unit has a through hole formed at a center thereof and a spring having a spring incorporated therein in a space defined by the through hole and communicating with the through hole, A housing 41 in which an oil pressure inlet 414 is communicated with one side of the oil pressure inlet 414 so as to inject hydraulic pressure into one side of the oil pressure inlet 414, The first slider 42 is reciprocated vertically by the hydraulic pressure injected through the first slider 42 and has an inclined surface 421 formed on one side thereof and an inclined surface 431 corresponding to the inclined surface 421 of the first slider 42 is formed And a second slider (43) slidably moved in a lateral direction together with the movement of the first slider (42).
The apparatus according to claim 1, wherein the centering unit (5) comprises: a circular support head (51) supported by a plurality of vertically installed columns (511) And a plurality of LM guides 54 provided on the upper portion of the support plate 53 so as to face each other to be slidably engaged with the wheel 52. The LM guide 54 is mounted on the upper surface of the base 52, A plurality of clamp jigs 55 which are tightly fixed to the inner surface of the clamp jig 55 and a pinion 56 which is connected to a lower portion of the clamp jig 55 and is provided at the center of the support plate 53 , And a hydraulic cylinder (58) connected to the end of the rack (57) and feeding the rack (57) reciprocatingly.

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