The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
The cutaway view of the state that Fig. 1 is in the expression embodiments of the present invention, the internal diameter of bobbin is controlled with clamping component.Fig. 2 is the cutaway view of representing by the state behind the clamping component relieving bobbin internal diameter.
Supporter 1 is fastened to by bolt 24 under the state on the frame (do not have among the figure expression) and is being provided with highlightedly at flange part 1a among Fig. 1.Bearing 4 fastens, axis of revolution 2 can by free rotaring ground supporting with the hollow bulb 1b of above-mentioned supporter 1.Axle drive shaft 15 is connected with the right side of propulsive effort transmission member 14 with above-mentioned axis of revolution 2; Seat 6 is pressed into the left side of above-mentioned axis of revolution 2 by the protrusion 3 of this axis of revolution 2, setting clamping component 12a~12h that the internal diameter of bobbin 13a~d is controlled on this periphery of 6.
Above-mentioned clamping component is made of the coniform member 9 of annular, a plurality of (being divided into 6 the in the present embodiment) clamp 8 that is divided on circumference and a plurality of compression coil spring 25.
The inner-diameter portion whose that the internal diameter of above-mentioned coniform member 9 and seat 6 external diameter fastened, were formed in coniform part 7 and clamp 8 on the periphery fastens.
Form ditch portion on above-mentioned seat 6, spring support 11a~11h fastens with these ditch portions respectively, and an end of above-mentioned compression spring is to engage with spring support 11a~11h respectively.Above-mentioned compression spring makes the clamp 8 that fastens with this coniform member 9 expand to normal direction and opens along axially coniform member 9 being pushed, and thus the internal diameter of bobbin 13a~d is controlled.
Form a plurality of square holes on the cylindric sleeve 10 that sets coaxially with seat 6, above-mentioned a plurality of clamps 8 fasten with these square holes respectively, above-mentioned clamp 8 can be expanded to normal direction open.Though in the present embodiment, sleeve 10 usefulness one represent, also can make be divided into vertically a plurality of.
Being formed in slotted hole 10a on the above-mentioned sleeve 10 is arranged to and is fixed tightly in pin 14 on above-mentioned seat 6 one ends and fasten, make sleeve 10 not turn round and can be along moving axially along gyratory directions.
Piston 17 fastens with the root of above-mentioned supporter 1 coaxially, and its end is being fixed vertically by the back-up ring 23 that is fixed tightly on the supporter 1.With cylinder body 16 be adapted to can with above-mentioned piston 17 coaxially along moving axially, O shape circle 21,22 is provided on the engagement section of above-mentioned cylinder body 16 and piston 17, constitutes cylinder thus.
On above-mentioned cylinder body 16, tightening up annular plate 18 by back-up ring 20.Between above-mentioned piston 17 and the annular plate 18, on above-mentioned supporter 1, setting compression spring 19 coaxially, when compressed-air supply not being arrived the air supply port 16a of above-mentioned cylinder body 16, this cylinder body 16 just with the flange part 1a tight joint that is formed on supporter 1 root.
Below, illustrate from the state of bobbin internal diameter relieving clamping component, the situation when promptly discharging with reference to Fig. 2.When from air supply port 16a supply pressurized air, compression spring 19 is compressed, because separating with flange part 1a as illustrated in fig. 2, moves to the left cylinder body 16, piston 17 separates with back-up ring 23 and moves to the right, thereby the end face 10b of the end face 16b of cylinder body 16 part and sleeve 10 partly connects, towards axial push sleeve 10.
Consequently towards axially (left of Fig. 2) to be formed in sleeve 10 internal diameters on the pushing of 9a part of the coniform member 9 that combines of the 10c of ditch portion, thereby compression compression spring 25, clamping component 8 just becomes free state, unclamps compressing the bobbin internal diameter along normal direction thus.At this moment, the flange part 17a that is formed on the above-mentioned piston 17 connects with seat 6 flange part 6a, and seat 6 is just by the effect of piston 17, and is subjected to the pulling force towards the force opposite direction of axial push sleeve 10 that causes with above-mentioned cylinder body 16.Promptly, seat 6 is furthered by piston 17.
Here, with reference to Fig. 3 the relation of above-mentioned thrust and pulling force is described in detail.When pressurized air is sent into, cylinder body 16 and sleeve 10 are connected, by cylinder body 16 with the thrust shown in the F1 on above-mentioned sleeve 10.
Suppose not to be provided with the mechanism that furthers of the present invention, under the occasion that 17a in the present embodiment or 6a are not set, above-mentioned thrust F1 just acts on, acts on, then acts on last thrust of just being born above-mentioned F1 by the inner ring of bearing 4 to spring support 11, seat 6, axis of revolution protrusion 3 to compression spring 25 from coniform member 9 to coniform member 9 from sleeve 10.Therefore, thrust just acts on the bearing, becomes the reason that causes that bearing is damaged ahead of time and the life-span reduces.
Because in the present invention, constitute cylinder with cylinder body 16 and piston 17, and further mechanism's (draw I and post the せ means) 17a and 6a be set separately, even thrust F1 is acted on the seat 6, also have with the rightabout pulling force-F1 of above-mentioned thrust F1 and act on the seat 6, thereby these power just repeal by implication, and thrust just can not act on the above-mentioned bearing.
When the air supply port 16a from above-mentioned cylinder body takes pressurized air away, by compression spring 19 flick, up to cylinder body 16 contact with flange part 1a, piston 17 is with till back-up ring 23 on being fixed tightly in supporter 1 contacts.
Consequently thereby sleeve 10 is decontroled, is moved to the right, made by the effect of compression spring 19 coniform member 9 to make clamp 8 open, the internal diameter of bobbin 13a~d is controlled towards the normal direction expansion to right-hand moving, become state shown in Figure 1, seat and bobbin are turned round with being integral.
Though present embodiment is that clamping component is made coniform member, also can makes by the mechanism that elastomeric compression is expanded out or be applicable to other known clamping components.
Though in the present embodiment, the drive source of the drive source of the releasing mechanism (リ リ one ス means) of the above-mentioned seat of pushing and the mechanism that furthers that contends with this releasing mechanism is decided to be pressurized air when discharging, be public and constitute cylinder with being integral, but drive source also can not use pressurized air, also can use oil pressure or other mechanisms; In addition, present embodiment is above-mentioned releasing mechanism and the drive source of mechanism of furthering to be made public, also can make the structure of using different drive sources separately, moving in linkage mutually.