Chuck for wire driver

Abstract

To provide a chuck capable of clamping a shaft quickly and easily without allowing the shaft to be off-centered, as well as, to be inclined with respect to an axis of rotation.SOLUTION: A chuck includes a jaw guide, interleaving jaws, and an inclined engagement surface. The jaw guide defines a vertical axis and includes jaw channels circumferentially distributed about the vertical axis. The jaws are slidably disposed in the jaw channels. Each jaw has: a clamping surface facing the vertical axis; a driving surface (90) substantially opposite the clamping surface; a protrusion on a first lateral side; and a cavity in a second lateral side. The protrusion of each jaw is disposed at least in part in the cavity of an adjacent jaw. The engagement surface is on one of an inner surface of the jaw guide and an engagement sleeve, and is substantially centered about the vertical axis and substantially parallel to the driving surface. Displacement of the jaws relative to the engagement surface in a clamping direction displaces the clamping surfaces toward the vertical axis.SELECTED DRAWING: Figure 10B

Claims

1. Chucks (20, 220, 420) for tightening shafts (101, 101', 101'', 301, 501), A jaw guide (64, 264, 464) extending in the axial direction defining a vertical axis (24, 224, 424), the jaw guide (64, 264, 464) having a plurality of first jaw grooves (65, 265, 465) distributed circumferentially around the vertical axis (24, 224, 424), A plurality of clamping jaws (66, 66', 66'', 266, 466) slidably arranged within the jaw grooves (65, 265, 465), wherein each jaw (66, 66', 66'', 266, 466) has a clamping surface (88, 288, 488) facing the vertical axis (24, 224, 424), a drive surface (90, 290, 490) substantially opposite to the clamping surface (88, 288, 488), a projection (92, 92', 92'', 92'''', 292, 492, 492') on a first side surface (94, 94', 94'', 294, 494), and a second The jaws (66, 66', 66'', 266, 466) are provided with cavities (96, 96', 96'', 96'''', 296, 496, 496') on their sides (98, 98', 98'', 298, 498), and the projections (92, 92', 92'', 92'''', 292, 492, 492') of each jaw (66, 66', 66'', 266, 466) are at least partially positioned within the cavities (96, 96', 96'', 96'''', 296, 496, 496') of adjacent jaws (66, 66', 66'', 266, 466), It has a base (78) and a plurality of fingers (76) extending from the base (78), and the fingers (76) are equipped with a spring (74) that can engage with the jaw (66) to hold the jaw (66) in the jaw groove (65), An inclined engaging surface (84, 284, 484) located on one of the inner surfaces of the jaw guide (64, 264, 464) and the inner surface of the engaging sleeve (80, 280), wherein the movement of the jaw (66, 66', 66'', 266, 466) in the tightening direction relative to the inclined engaging surface (84, 284, 484) causes the tightening surface (88, 288, 488) to move toward the vertical axis (24, 224, 424), Equipped with, Each jaw (66'') has projections (92'', 92'''') and cavities (96'', 96'''') on its first side (94'') and second side (98''), respectively, and the projections (92'', 92'''') on the first side (94'') of each jaw (66'') are at least partially located within the cavities (96'', 96'''') on the second side (98'') of the adjacent jaw (66''), and the projections (92'', 92'''') on the second side (98'') of each jaw (66'') are at least partially located within the cavities (96'', 96'''') on the first side (94'') of the adjacent jaw (66''). Chuck (20,220,420).

2. The jaws (66, 66', 66'', 266, 466) define receiving openings (106, 106', 106'', 306, 506) that are suitable for receiving and tightening shafts (101, 101', 101'', 301, 501) within a range from a first diameter to a larger second diameter, and the projections (92, 92', 92'', 92''', 292, 492, 492') are positioned within the cavity (96, 96', 96'', 96'''', 296, 496, 496') when the jaws (66, 66', 66'', 266, 466) are positioned to tighten the shaft (101') of the first diameter, The chuck (20, 220, 420) according to claim 1.

3. The grooves (65, 265, 465) and jaws (66, 66', 66'', 266, 466) are evenly distributed around the vertical axis (24, 224, 424), and the projections (92, 92', 92'', 92''', 292, 492, 492') of each jaw (66, 66', 66'', 266, 466) are substantially complementary to the cavities (96, 96', 96'', 96''', 296, 496, 496') of the adjacent jaws (66, 66', 66'', 266, 466). The chuck (20, 220, 420) according to claim 1.

4. The jaws (66, 66', 66'', 266) and the projections (92, 92', 92'', 92'''', 292) each have inclined distal surfaces (102, 102', 102'', 302, 104, 104', 104'', 304), The chuck (20, 220) according to claim 1.

5. The jaws (66, 66', 66'', 266) and the projections (92, 92', 92'', 92'''', 292) each have an inclined proximal surface (108, 108', 108'', 108''', 110, 110', 110'', 110'''), The chuck (20, 220) according to claim 1.

6. The jaws (66, 66', 66'', 266) and the projections (92, 92', 92'', 92'''', 292) each have an inclined distal surface (102, 102', 102'', 302, 104, 104', 104'', 304) and an inclined proximal surface (108, 108', 108'', 108''', 110, 110', 110'', 110'''), The chuck (20, 220, 420) according to claim 1.

7. The projections (92, 92', 92'', 92''', 292, 492, 492') extend into the gap between the opposing sides (94, 94', 94'', 294, 494, 98, 98', 98'', 298, 498) of adjacent jaws (66, 66', 66'', 266, 466) near the clamping surface (88, 288, 488). The chuck (20, 220, 420) according to claim 1.

8. The projections (92, 92', 92'', 92''', 292, 492, 492') extend beyond the clamping surface (88, 288, 488) toward the vertical axis (24, 224, 424). The chuck (20, 220, 420) according to claim 1.

9. The ratio of the largest shaft (101'') to the smallest shaft (101') that can be accommodated by the chuck (20, 220, 420) without being pinched is at least 4:

1. The chuck (20, 220, 420) according to claim 1.

10. A substantially cylindrical housing (36, 72) in which the jaw guides (64, 264), the jaws (66, 66', 66'', 266), and the engaging sleeves (80, 280) are rotatably disposed inside, A tightening lever (38) pivotably mounted to the housing (36, 72), wherein the tightening lever (38) is connected to one of the jaw guides (64, 264) and the engaging sleeves (80, 280) in order to move one of the jaw guides (64, 264) and the engaging sleeves (80, 280) in the axial direction, The chuck (20, 220) according to claim 1, further comprising the above.

11. The inclined engagement surface (284) is positioned on the engagement sleeve (280), the jaw guide (264) is substantially fixed to the engagement sleeve (280), and the chuck (220) further comprises an axially movable operating head (276) that axially engages with the jaw (266), wherein the axial movement of the operating head (276) in the engagement direction presses the drive surface (290) of the jaw (266) against the inclined engagement surface (284), causing the jaw (266) to move axially relative to the engagement sleeve (280). The chuck (220) according to claim 1.

12. The inclined engaging surface (484) is positioned on the jaw guide (464), and the jaw (466) has a threaded surface positioned to engage with the threads on the drive sleeve (470). The chuck (420) according to claim 1.

13. At least one of the jaws (66) has a spring slot (95) that crosses the drive surface (90) to receive one of the fingers (76) of the spring (74), The chuck (420) according to claim 1.

14. A chuck (20, 220, 420) for tightening shafts (101, 101', 101'', 301, 501), A jaw guide (64, 264, 464) extending in the axial direction defining a vertical axis (24, 224, 424), the jaw guide (64, 264, 464) having a plurality of first jaw grooves (65, 265, 465) distributed circumferentially around the vertical axis (24, 224, 424), A plurality of clamping jaws (66, 66', 66'', 266, 466) slidably arranged within the jaw grooves (65, 265, 465), wherein each jaw (66, 66', 66'', 266, 466) has a clamping surface (88, 288, 488) facing the vertical axis (24, 224, 424), a drive surface (90, 290, 490) substantially opposite to the clamping surface (88, 288, 488), a projection (92, 92', 92'', 92'''', 292, 492, 492') on a first side surface (94, 94', 94'', 294, 494), and a second side surface (98, 98', 98'', 298, 498). The jaws (66, 66', 66'', 266, 466) are provided with cavities (96, 96', 96'', 96''', 296, 496, 496') in which the projections (92, 92', 92'', 92''', 292, 492, 492') of each jaw (66, 66', 66'', 266, 466) are at least partially located within the cavity (96, 96', 96'', 96''', 296, 496, 496') of the adjacent jaw (66, 66', 66'', 266, 466) and extend beyond the clamping surface (88, 288, 488) toward the longitudinal axis (24, 224, 424), It has a base (78) and a plurality of fingers (76) extending from the base (78), and the fingers (76) are equipped with a spring (74) that can engage with the jaw (66) to hold the jaw (66) in the jaw groove (65), An inclined engaging surface (84, 284, 484) located on one of the inner surfaces of the jaw guide (64, 264, 464) and the inner surface of the engaging sleeve (80, 280), wherein the movement of the jaw (66, 66', 66'', 266, 466) in the tightening direction relative to the inclined engaging surface (84, 284, 484) causes the tightening surface (88, 288, 488) to move toward the vertical axis (24, 224, 424), A chuck (20, 220, 420) equipped with this.

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