CN2734381Y - Unloading type automatic locking drill chuck - Google Patents

Abstract

The utility model discloses an unloading type automatic locking drill chuck, comprising an upper cover, a body, an outer jacket, a lower cover, jaws, positioning block, a locking body, a pressure bolt, and springs. The outer jacket stably connects the components together, and the body is combined with the upper cover via the pressure bolt and is connected with the body and the outer jacket as one body. The lower side of the body is fitted with the locking body in a movable way, the lower end of the outer jacket is provided with three grooves, and the three claws of the locking body respectively move in the three grooves. The lower part of the outer jacket is provided with a lower cover, and the lower cover make the positioning block sealed in the outer jacket; the positioning block makes the three jaw positioned in the three slot thereof, and the jaws are corresponding matched with the wedges of the locking body. One side of each jaw is provided with a lug boss, the side surface of the lug boss is provided with a pit, the end of each spring is arranged in the pit. The springs are arranged in a symmetric way; namely, the two symmetrical surfaces are respectively provided with a spring. In the utility model, the slant surface locking body and the slant surface of each jaw are tightly combined, and the problems of the deflection and the falling off of the jaws can not occur; the quality and the stability of the drill chuck is improved thereby. The utility model is suitable for assembly and clamping various drills.

Description

Discharging type auto lock drill chuck

Technical field: the utility model relates to the drill chuck in the machinery tools, relates in particular to discharging type auto lock drill chuck.

Background technology: the keyless drill chuck of prior art is because structure is unreasonable, and claw is subjected to the effect of side force often to cause in various degree inclined to one side pawl, thereby makes precision stable inadequately, and impact resistance is relatively poor, and torque is also less.The Chinese patent 98206504.3 that the applicant has formerly applied for " discharging type auto lock drill chuck ", owing to lack automatic shedding motion, it is also convenient inadequately to use.

The utility model content: the purpose of this utility model is, overcomes the deficiencies in the prior art part, and a kind of discharging type auto lock drill chuck is provided, the power of being harmful to can be laid down in the work, make to have guaranteed the stability of working by the drill chuck auto lock, reach the purpose that improves product processing quality.Discharging type auto lock drill chuck described in the utility model includes loam cake, main body, overcoat, lower cover, claw, locating piece, locking body, hold-down bolt and spring and forms.With firm the linking together of each parts, a main body that has screw mechanism is by hold-down bolt and loam cake combination with an overcoat, and firmly connects main body and be coated at one.Below the main body with locking body movingly, three pawls on the locking body move in three grooves of overcoat lower end respectively.A lower cover is arranged under the overcoat, locating piece is sealed in overcoat, locating piece is equally spaced three claws, is positioned in its three grooves.Three claws are corresponding to be cooperated with the locking body wedge.Said main body is the main component of discharging type auto lock drill chuck described in the utility model, main body and overcoat connect as one by hold-down bolt, be provided with locking body with form movingly below the main body, be provided with lower cover below the overcoat, be provided with locating piece in the lower cover and locating piece is sealed.Locating piece is equally spaced three claws and is positioned in three grooves, and three claws cooperate with the locking body wedge relatively.Locating piece is equally spaced three claws and is positioned in said three grooves; Three claws are corresponding to be cooperated with the locking body wedge.Three claws are embedded in three gaps between the locating piece, but three claws are not to embed fully, in order to prevent the embedding fully of claw, are provided with a boss in a side of claw, are provided with in the side of boss to be used to be provided with the pit that brute spring is used.The end of spring is arranged in the pit, and one-tenth is symmetrical arranged, and promptly respectively is provided with a spring on two faces of symmetry.Said pit is provided with on two faces of correspondence of claw, is used for the end held stationary with brute spring, guarantees that three claws under the elastic force effect of brute spring, open under the situation of cease to bind immediately.Rotating main body to the right, locking body moves down under the thrust of spiral, moves right thereby promote claw, clamps drill bit.Rotating main body left, overcoat is motionless, moves on the locking body, and claw moves to left in locating piece under the effect of spring force, unclamps drill bit.The connected mode of drill chuck and lathe or electric tool can be that taper hole or screwed hole connect.

Discharging type auto lock drill chuck described in the utility model makes the claw can only side-to-side movement in locating piece, and locking body can only move up and down under the effect of overcoat lower end groove, has decomposed the compound motion of drill chuck claw.Locating piece is movable in lower cover, and when the claw unbalance stress, locating piece is angle of rotation automatically, makes the two inclined-plane of locking body and claw in conjunction with closely, inclined to one side pawl can not occur or fall problem such as pawl, thereby improve the quality and the stability of drill chuck.Make to use swift to operate, reliable, safety, convenience.The utility model is rational in infrastructure, and good operating stability is applicable to the clamping of various drilling tools.

Description of drawings: accompanying drawing 1 is the structural representation of discharging type auto lock drill chuck described in the utility model; Accompanying drawing 2 is schematic diagrames of overcoat; Accompanying drawing 3 is schematic diagrames of lower cover; Accompanying drawing 4 is schematic diagrames of locating piece; Accompanying drawing 5 is schematic diagrames of locking body; Accompanying drawing 6 is schematic diagrames of claw.1-loam cake 2-main body 3-overcoat 4-lower cover 5-claw 6-locating piece 7-locking body 8-hold-down bolt 9-spring

The specific embodiment: referring now to accompanying drawing 1,2,3,4,5 and 6, be described as follows in conjunction with the embodiments: garden shape loam cake 1 combines with main body 2 by interference fit, and main body 2 and overcoat 3 link together by hold-down bolt, and main body 2 and locking body 7 are by spiral movingly.Overcoat 3 is organically integrated each accessory, and overcoat 3 lower ends are provided with three grooves, and three pawls on the locking body 7 are embedded in the groove.Overcoat 3 lower ends are provided with lower cover 4, seal locating piece 6 in overcoat 3.Locating piece 6 is positioned claw 5 in its groove, makes it can only side-to-side movement, promptly plays guiding, improved claw to neutrality.Locking body 7 play inclined wedge augmenting since locking body 7 and claw 5 cammed surface in conjunction with closely, so claw 5 inclined to one side pawl can not occur, fall problem such as pawl.Discharging type auto lock drill chuck described in the utility model includes loam cake 1, main body 2, overcoat 3, lower cover 4, claw 5, locating piece 6, locking body 7, hold-down bolt 8 and spring 9 and forms.With firm the linking together of each parts, a main body 2 that has screw mechanism firmly connects main body 2 and overcoat 3 in one by hold-down bolt 8 and overcoat 3 combinations with an overcoat 3.Below the main body 2 with locking body 7 movingly, main body 2 is Cylinders that have spiral, overcoat 3 is a tubular structure.Overcoat has a lower cover 4 for 3 times, will locate 6 and seal in overcoat 3, and locating piece 6 is equally spaced three claws 5, is positioned in its three grooves.Three claws 5 are corresponding to be cooperated with locking body 7 wedges.Said main body 2 is main components of discharging type auto lock drill chuck described in the utility model, and main body 2 is provided with and is used for cooperating the spiral that usefulness is installed with loam cake 1, lower cover 4 and overcoat 3.Main body 2 connects as one with overcoat 3 usefulness spirals, is provided with locking body 7 with form movingly below the main body 2, is provided with lower cover 4 below the overcoat 3, is provided with locating piece 6 in the lower cover 4 and locating piece 6 is sealed.Locating piece 6 is equally spaced three claws 5 and is positioned in three grooves, and three claws 5 cooperate with locking body 7 wedges relatively.Locating piece 6 is equally spaced three claws 5 and is positioned in said three grooves; Three claws 5 are corresponding to be cooperated with locking body 7 wedges.Three claws 5 are embedded in three gaps between the locating piece 6, but three claws 5 are not to embed fully, in order to prevent the embedding fully of claw 5, be provided with a boss in a side of claw 5, be provided with the pit that is used to be provided with brute spring 9 usefulness in the bilateral symmetry of claw 5.The end of spring 9 is arranged in the pit of claw 5 sides, and one-tenth is symmetrical arranged, and promptly respectively is provided with a spring 9 on two faces of each claw 5 symmetry.Said pit is provided with on two faces of correspondence of claw 5, is used for the end held stationary with brute spring 9, guarantees that three claws 5 under the elastic force effect of brute spring 9, open under the situation of cease to bind immediately.Rotating main body to the right, locking body 7 moves down under the thrust of spiral, moves right thereby promote claw 5, clamps drill bit.Rotating main body left, overcoat 3 is motionless, moves on the locking body 7, and claw 5 unclamps drill bit moving to left under the effect of spring force in locating piece 6.The connected mode of drill chuck and lathe or electric tool can be taper hole or screwed hole.Discharging type auto lock drill chuck described in the utility model makes the claw 5 can only side-to-side movement in locating piece 6, and locking body 7 can only move up and down under the effect of overcoat 3 lower end grooves, has decomposed the compound motion of drill chuck claw 5.Locating piece 6 is movable in overcoat 3, and when claw 5 unbalance stress, locating piece 6 is angle of rotation automatically, makes the two inclined-plane of locking body 7 and claw 5 in conjunction with closely, inclined to one side pawl can not occur or fall problem such as pawl, thereby improve the quality and the stability of drill chuck.Make to use swift to operate, reliable, safety, convenience.The utility model is rational in infrastructure, and good operating stability is applicable to the clamping of various drilling tools.

Claims (2)

1, discharging type auto lock drill chuck, include loam cake (1), main body (2), overcoat (3), lower cover (4), claw (5), locating piece (6), locking body (7) and hold-down bolt (8) are formed, overcoat 3 is with firm the linking together of each parts, main body (2) and loam cake (1) interference fit, and main body (2) and overcoat (3) are connected as one by hold-down bolt, below the main body (2) with locking body (7) movingly, it is characterized in that being provided with a boss, be provided with the pit that is used to be provided with brute spring (9) usefulness in the bilateral symmetry of claw in a side of claw (5).

2, discharging type auto lock drill chuck according to claim 1 is characterized in that respectively being provided with a spring (9) on two faces of each claw (5) symmetry, and the end of spring (9) is arranged in the pit of claw (5) side.

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