CN202894430U

CN202894430U - Improvement of back shell of suspension-type externally-connected tightening drill chuck with handle

Info

Publication number: CN202894430U
Application number: CN 201220346382
Authority: CN
Inventors: 陈肇和
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-08
Filing date: 2012-07-08
Publication date: 2013-04-24
Anticipated expiration: 2022-07-08

Abstract

An improvement of a back shell of a suspension-type externally-connected tightening drill chuck with a handle comprises a chuck body, three clamping pins and inner cone nuts, wherein three inclined holes are formed in the front portion of the chuck body, a central hole is formed in the back portion of the chuck body, the three clamping pins are inserted into the three inclined holes, and the inner cone nuts are matched with the upper portions of the clamping pins in a threaded mode. The three clamping pins sleeved in the three inclined holes of the chuck body and the inner cone nuts matched with the upper portions of the clamping pins in the threaded mode are embedded into a front shell in a groove of the chuck body. A back shell is sleeved on the back of the front shell. Back shell components are fixed in an inner hole of the back shell and blocked by a front block ring. The distance between the front block ring and a back block ring is used for conversion of a drill handle on a conversion support. The improvement is characterized in that a half slot and a locking step are manufactured in the inner hole of the back shell, and the locking step and a steel bead in a through hole of the back portion of the chuck body form a locking mechanism. By means of the improvement of the back shell of the suspension-type externally-connected tightening drill chuck with the handle, prior metallic sintered products are removed and combined into one, manufacturing cost is saved, manufacturing process is simplified, and therefore economic benefits are improved.

Description

The improvement of its back casing of suspended type external connecting hand-tight drill chuck with shank

Technical field

The utility model relates to a kind of drill chuck that uses at drill gun, especially a kind of can being suitable for the drill chuck that can hang on the drill gun of drilling tool switching device for the conversion choice for use.

Background technology

A kind of rechargeable gun drill or alternating current gun drill with drilling tool switching device on the existing market, need both can hang for the conversion choice for use at drilling tool switching device, idea price is cheap again, sound construction, this type of drill chuck easy to use, be meeting the market requirement, satisfy customer requirements, it is reasonable, easily manufactured to explore a technique, new road with low cost although applied for patent (ZL2011200289066), also exists structural member too many, wherein the metallic sintered products cost is high, connects again inadequate weak point of fastness.

Summary of the invention

For overcoming the deficiencies in the prior art part, problem for above-mentioned existence, considering is not affecting the use function, adopt on the reliable basis of clamping fastness and strengthen nylon integral manufacturing scheme, saving metallic sintered products unites two into one, do like this and can satisfy the position and lock requirement, can guarantee again to reverse stressed requirement.

The technical scheme that its technical problem that solves the utility model adopts is:

Forwardly be provided with three inclined holes, the rear portion is shaped with the collet body of medium pore, insert three pinches in anterior three inclined holes of collet body and the interior flare nut of pinch top threaded engagement, be inserted in the collet body front portion with the tight cover of interior flare nut and interior flare nut be embedded in procapsid in the groove of collet body, the procapsid back is set with back casing, back casing is blocked by front back-up ring, and front back-up ring back is rear back-up ring; Be drillstock between front back-up ring and the rear back-up ring, the end face of medium pore is shaped with " ten " word breach, can match with the protruding key on the drill gun main shaft, the collet body rear portion is shaped with the through hole that external diameter communicates with medium pore, it is characterized in that the back casing endoporus is shaped with half slot and locking step, the steel ball in the through hole at locking step and collet body rear portion forms locking mechanism.

The beneficial effects of the utility model, the back casing endoporus after the improvement has saved original metallic sintered products, unites two into one and has saved manufacturing cost, has simplified manufacture craft, thereby has improved economic benefit.

Description of drawings

Embodiment is further described the utility model below in conjunction with accompanying drawing.

Fig. 1 is the overall structure figure of the utility model embodiment.

Fig. 2 is the schematic diagram of drill gun main shaft.

Fig. 3 is the cutaway view of Figure 1A-A.

Fig. 4 is the cutaway view of Figure 1B-B.

1. pinches among the figure, 2. collet body, 21 " ten " word breach, 22. medium pores, 23. drillstock, 24. counterbores, 25. through holes, 3. interior flare nut, 4. procapsid, 5. back casing, 51. half slots, 52. locking steps, 6. spring, 8. front back-up ring, 9. pad, 10. pad, 11. rear back-up rings, 12. steel balls, 14. plane bearing, 15. steel balls

The specific embodiment

Back-up ring 11 after the dismounting in the suppending hole and patchhole on the drillstock 23 aligning drilling tool switching devices, then refills pad and rear back-up ring 11, so drill chuck is suspended in selective conversion use on the conversion support; Aim at when the medium pore 22 of drill chuck and to be inserted in the drill gun main shaft, and continue to advance inwards simultaneously back casing to be pulled to pass and end terminal point, at this moment the endoporus wall in back casing 5 holes is locked and is decided step 52 and be in a high position, that is to say that being arranged on interior steel ball 12 tops of collet body 2 rear through hole leaves the space, when the drill gun front-end of spindle pushing tow that advances inwards exposes steel ball 12 at medium pore 22 walls, force the steel ball hole to move inward and enter top position, space, as continue to push ahead and decontrol simultaneously hand to the passing of pulling of back casing, under the effect of spring 6, back casing sets back, the steel ball that the low level of drive locking step is pushed in the space moves in through hole, the steel ball of being pushed when the drill gun main shaft pushes away terminal point only and protruding key on the main shaft matches just enters the groove of drill gun main shaft, drill chuck can not move axially again, can be driven to rotate, operation.

Locking and the dismounting of drill chuck on the drill gun main shaft not only played in the passing of pulling of back casing, reversing of it can also drive the collet body rotation by the steel ball 15 in counterbore, be arranged on three pinches in anterior three inclined holes of collet body when back casing reverses under the effect of interior flare nut 3, three pinches in inclined hole become contraction radially do telescopic moving synchronously or unclamp, and reach the purpose that clamps the instruments such as drill bit.

Claims

1. the improvement of its back casing of suspended type external connecting hand-tight drill chuck with shank, comprise that the front portion is provided with three inclined holes, the rear portion is shaped with the collet body (2) of medium pore, three pinches (1) in anterior three inclined holes of insertion collet body and the interior flare nut (3) of pinch top threaded engagement, be inserted in the collet body front portion with the tight cover of interior flare nut and interior flare nut be embedded in procapsid (4) in the groove of collet body, the procapsid back is set with back casing (5), back casing is blocked by front back-up ring (8), front back-up ring back is rear back-up ring (11), be drillstock (23) between front back-up ring and the rear back-up ring, the end face of medium pore is shaped with " ten " word breach (21), can match with the protruding key on the drill gun main shaft, the collet body rear portion is shaped with the through hole that external diameter communicates with medium pore, it is characterized in that the back casing endoporus is shaped with half slot (51) and locking step (52); Steel ball (12) in the through hole (25) at locking step and collet body rear portion forms locking mechanism.