CN2480087Y

CN2480087Y - Locking type holder for drill

Info

Publication number: CN2480087Y
Application number: CN 01243443
Authority: CN
Inventors: 杨桂模; 谭兴达
Original assignee: WEIDA MACHINE-TOOL GROUP Co SHANDONG
Current assignee: Shandong Weida Machinery Co Ltd
Priority date: 2001-06-13
Filing date: 2001-06-13
Publication date: 2002-03-06
Anticipated expiration: 2011-06-13

Abstract

The utility model relates to a self-clock drill chuck, comprising a drill body, grippers, a thread, a fore casing and a back casing, wherein the three grippers are respectively equipped in three equally-distributed inclined holes in the drill body and are further meshed with the thread, and a clock-control ring is disposed between the fore casing and the back casing, and a wheel is disposed between the thrust surface and the thread. A ring-shaped drive element is connected and fixed between the thread and the fore casing and is further connected with a lock-control ring. The utility model overcomes the deformation of the drill chuck of the prior art, caused by overcoming elastic elements in the process of locking, and the shortage like the decrease of the maximum clamp force. The utility model is simple and convenient in operation and has the advantages of reasonable structure, easy assembly, stable nature and reliable performance and the like, thereby suitable for installing and gripping various drills.

Description

Locking type clamping head of drill

The utility model relates to a kind of drilling tool clamping device, specifically a kind of locking type clamping head of drill.

We know, existing drill chuck is generally by drill body, jaw, screw, compositions such as overcoat, overcoat can comprise protheca again, the back cover, the back cover, bearing gasket interference respectively is connected on the drill body, and three jaws are installed in respectively in the inclined hole of three five equilibriums on the drill body, screw is installed in the screw groove of drill body, threaded engagement on screw and the jaw forms thread transmission, and the screw outside also can be provided with nut sleeve, nut sleeve and screw interference fit, nut sleeve is provided with protheca outward, the protheca inwall is provided with key, and nut sleeve is provided with keyway, and protheca is connected through key with nut sleeve, moving for preventing the protheca string, at drill body front end interference fit joint door, during use, hand is twisted the protheca rotation, protheca drives screw through nut sleeve and rotates, screw drives in the inclined hole of jaw on drill body through screw thread and moves forward and backward, thereby three-jaw is opened or closure, to reach the purpose of unclamping or clamping drilling tool, the deficiency of said structure is, drill chuck is when work, because vibration or impact, drill chuck is easily loosening, have a strong impact on operating efficiency, poor stability.

The purpose of this utility model is exactly to provide a kind of rational in infrastructure in order to overcome above-mentioned the deficiencies in the prior art, has locking function, high efficiency, safe in utilization, locking type clamping head of drill easily.

For achieving the above object, the technical solution of the utility model is: a kind of locking type clamping head of drill, include drill body, jaw, screw, protheca, the back cover, the drill body rear end is provided with the axial hole that engages with the driving shaft of driven tool, the outside connection with the back cover fixed, three jaws are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw and the jaw engagement that is installed in the drill body inclined hole, the screw outside is fixedly connected with protheca, it is characterized in that the outside protheca of drill body, back inner room is provided with the locking control loop, be provided with gear between drill body thrust surface and screw, be provided with rolling element between gear and the screw, be connected and fixed an annular drive part between screw and the protheca, annular drive part also engages with the locking control loop.

Locking control loop inwall described in the utility model is provided with several circumferential segmentation control curved surfaces.Described annular drive part is provided with several elastic pawls along circumference, and elastic pawl comprises the arm and the pawl point of pressed toward gear, and the arm of pressed toward gear is locked on the control loop segmentation control curved surface and oppressed, and is used to control pawl point and gears engaged, reaches the purpose of locking.

The utility model is owing to adopt said structure, and the locking control loop can be controlled elastic pawl and be arranged on gears engaged between drill body thrust surface and screw.After clamping drilling tool, operate the locking control loop, segmentation control curved surface compressing elastic pawl is controlled pawl point and gears engaged on the locking control loop, reaches the purpose of locking.When unclamping, as long as backward rotation locking control loop, the elastic pawl of the annular drive part under the control of segmentation control curved surface breaks away from gear tooth under himself flexible effect, then rotate protheca and locking control endless belt and annular drive part, screw and begin together to turn to and be totally released drilling tool, it is laborsaving, easy that pine is unloaded.The utility model has overcome when existing drill chuck is locked will overcome the flexible member distortion, the deficiency that maximum clamping force decreases, it manipulates quick and easy, has rational in infrastructure, advantages such as easy to assembly, stable performance, reliable operation are applicable to the clamping of various drilling tools.

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is the utility model structural representation;

Fig. 2 is that the A-A of Fig. 1 is to schematic diagram;

Fig. 3 is a kind of annular drive part structural representation of the present utility model;

Fig. 4 is the schematic top plan view of Fig. 3;

Fig. 5 is the structural representation of the utility model locking control loop;

Fig. 6 is the schematic top plan view of Fig. 5.

As shown in Figure 1 and Figure 2, a kind of locking type clamping head of drill of the utility model, include drill body 1, jaw 3, screw 2, protheca 8, back cover 4, drill body 1 rear end is provided with the axial hole that engages with the driving shaft of driven tool, outside and back cover 4 interference are connected and fixed, three jaws 3 are installed in respectively in the inclined hole of three five equilibriums in the drill body 1, screw 2 and jaw 3 engagements that are installed in the drill body inclined hole, screw 2 outsides are fixedly connected with protheca 8, cover 9 in also can being provided with between protheca 8 and the screw 2, it works the driving effect that connects.The pass of above-mentioned composition, structure and coupled parts is a prior art, and this does not describe in detail.

Characteristics of the present utility model are to be provided with locking control loop 5 between drill body 1 outside protheca 8, the back cover 4, be provided with gear 6 between drill body 1 thrust surface and the screw 2, gear 6 can be fastened on the drill body, also can be arranged on rotationally between drill body 1 thrust surface and the screw 2.Be provided with rolling element 10 between gear 6 and the screw 2, be connected and fixed an annular drive part 7 between screw 1 and the protheca 8, annular drive part 7 also engages with locking control loop 5.

As shown in Figure 3, Figure 4, annular drive part 7 described in the utility model can tight fit or key be fixedly connected in screw 2 outsides, it is provided with several elastic pawls 7-1 along circumference, elastic pawl 7-1 comprises the arm and the pawl point of pressed toward gear, the arm of pressed toward gear is locked on the control loop segmentation control curved surface and is oppressed, and is used to control the pawl point and gear 6 meshes.

As Fig. 5, shown in Figure 6, locking control loop 5 described in the utility model is installed between protheca 8 and the back cover 4, inwall is provided with several circumferential segmentation control curved surface 5-2, and it can oppress arm control pawl point and gear 6 engagements that elastic pawl 7-1 goes up pressed toward gear.Locking control loop 5 outsides are provided with bar tooth 5-1, conveniently hold rotation.

During the utility model work, hold

protheca

8 and 5 rotations of locking control loop, protheca 8 drives screws 2 rotations through interior cover 9 and annular drive part 7, and screw 2 drives in the inclined hole of jaw 3 on drill body 1 through screw thread and moves forward and backward, thereby three-jaw is opened or closure, to reach the purpose of unclamping or clamping drilling tool.Maximum clamping force does not have loss like this.After clamping drilling tool, operate locking control loop 5, segmentation control curved surface 5-2 compressing elastic pawl is controlled pawl point and gears engaged on the locking control loop 5, reaches the purpose of locking.When unclamping, as long as backward rotation locking control loop, under the control of locking control loop, the elastic pawl of annular drive part and gear tooth break away from.Be rotated further protheca and locking control endless belt and annular drive part, screw and begin together to turn to and be totally released drilling tool, it is laborsaving, easy that pine is unloaded.The utility model has overcome when existing drill chuck is locked will overcome the flexible member distortion, the deficiency that maximum clamping force decreases, it manipulates quick and easy, has rational in infrastructure, advantages such as easy to assembly, stable performance, reliable operation are applicable to the clamping of various drilling tools.

Claims

1, a kind of locking type clamping head of drill, include drill body, jaw, screw, protheca, the back cover, the drill body rear end is provided with the axial hole that engages with the driving shaft of driven tool, the outside connection with the back cover fixed, three jaws are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw and the jaw engagement that is installed in the drill body inclined hole, the screw outside is fixedly connected with protheca, it is characterized in that the outside protheca of drill body, back inner room is provided with the locking control loop, be provided with gear between drill body thrust surface and screw, be provided with rolling element between gear and the screw, be connected and fixed an annular drive part between screw and the protheca, annular drive part also engages with the locking control loop.

2, locking type clamping head of drill as claimed in claim 1 is characterized in that said locking control loop inwall is provided with several circumferential segmentation control curved surfaces.

3, locking type clamping head of drill as claimed in claim 1 is characterized in that said annular drive part is provided with several elastic pawls along circumference.

4, locking type clamping head of drill as claimed in claim 3 is characterized in that said elastic pawl comprises the arm and the pawl point of pressed toward gear, and the arm of pressed toward gear is locked on the control loop segmentation control curved surface and oppressed, and is used to control pawl point and gears engaged.