CN215199799U

CN215199799U - Drill chuck

Info

Publication number: CN215199799U
Application number: CN202023163686.6U
Authority: CN
Inventors: 周文华; 童学标
Original assignee: Zhejiang Sanou Machinery Co Ltd
Current assignee: Zhejiang Sanou Machinery Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-12-17
Anticipated expiration: 2030-12-24

Abstract

The utility model provides a drill chuck, which comprises a rotary sleeve, a drill body, a nut, a washer, a bearing and a clamping jaw, wherein the nut is in threaded connection with the clamping jaw; the drill body does not set up the nut groove, the nut is whole nut, the main casing body with whole nut is connected, the rotary sleeve front end still sets up the decoration cap of being made by the punching press of elastic sheet material, the decoration cap is equipped with the centre bore to set up the elasticity pothook at the rear end of centre bore, the drill body be close to front end department and set up the round draw-in groove, the pothook and the draw-in groove joint of decoration cap, the center hole wall of decoration cap is connected with drill body front end interference fit, the rotary sleeve passes through the decoration cap and by spacingly at the ascending front portion of axial. The utility model discloses assembly step is simple, does benefit to and reduces cost expert and guarantee performance.

Description

Drill chuck

Technical Field

The utility model relates to a drill chuck especially relates to closefisted drill chuck.

Background

The drill chuck is internally provided with a drill body, a clamping jaw, a nut and a rotating sleeve, wherein the nut is in threaded connection with the clamping jaw, the rotating sleeve is connected with the nut, a gasket is arranged on a step of the drill body behind the nut, the nut is supported on the gasket through a bearing, and the rotating sleeve is operated by hand to rotate the nut so as to drive the clamping jaw to move forwards or backwards to enable the clamping jaw to clamp or loosen the drill bit. Under the general condition, in the drill chuck of whole nut structure, the axial of its swivel mount is spacing by preceding jump ring, perhaps by the steel part's that round steel car processing was made decoration cover spacing etc. and spacing through the jump ring, reduced certain aesthetic measure, and the assembly is relatively complicated, and the decoration cover of the steel part of making through round steel car processing is spacing, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art, and provides a drill chuck which is beneficial to assembly and cost reduction. Therefore, the utility model adopts the following technical scheme:

the drill chuck comprises a rotary sleeve, a drill body, a nut, a washer, a bearing and a clamping jaw, wherein the nut is in threaded connection with the clamping jaw; the drill body is characterized in that a nut groove is not formed in the drill body, the nut is a whole nut, the main sleeve body is connected with the whole nut, a decoration cap made of elastic plates through stamping is further arranged at the front end of the rotary sleeve, the decoration cap is provided with a center hole, an elastic clamping hook is arranged at the rear end of the center hole, a circle of clamping groove is formed in the position, close to the front end, of the drill body, the clamping hook and the clamping groove of the decoration cap are clamped, the center hole wall of the decoration cap is connected with the front end of the drill body in an interference fit mode, and the front portion of the rotary sleeve in the axial direction is limited through the decoration cap.

On the basis of adopting above-mentioned technical scheme, the utility model discloses still can adopt following further technical scheme or to these further technical scheme combined use.

The rotary sleeve comprises a main sleeve body and a metal shell, and the front parts of the main sleeve body and the metal shell on the axis are limited by the decorative cap.

The inner side of the decorative cap is bent into the central hole wall.

The rear part of the central hole wall is provided with a plurality of pieces along the circumferential direction, intervals are arranged among the pieces, and the clamping hooks are formed at the rear ends of the pieces.

The elastic plate is made of 65Mn or stainless steel.

The outer side of the front end of the drill body is provided with a conical surface; the decorative cap is located immediately behind the conical surface, the front end of the main sleeve body is in a shape of a truncated cone, the outer side surface of the decorative cap is in a shape of an adaptive conical surface, the decorative cap is also in a shape of an adaptive conical frustum, and the front end of the metal shell is bent to be fixed at the bottom of the conical frustum of the main sleeve body and limited by the decorative cap.

The main sleeve body of the rotary sleeve does not extend to the axial position corresponding to the rear end of the clamping jaw when the clamping jaw retreats to the extreme limit position in the axial direction, and the rear part of the metal shell of the rotary sleeve is radially positioned with the rear end of the drill body through a rear cover fixed with the metal shell of the rotary sleeve.

The front axial positioning of the integral nut is formed by matching the integral nut and the main sleeve body, and the nut is matched with the main sleeve body in a radial positioning mode.

The diameter of the drill body is reduced, and the gasket is provided with a clamping jaw abdicating hole for the clamping jaw; the inner periphery of a gasket between the two clamping jaw abdicating holes is in radial positioning fit with the surface of the drill body with the diameter being governed; a plurality of teeth are arranged on the inner periphery of the gasket between the jaw abdicating holes, and tooth tips of the teeth are embedded into the surface of the drill body;

the radial positioning of the bearing is not performed through the drill body, but performed through the cooperation of one or two of the washer, the main sleeve body and the nut.

The drill body is provided with a positioning step in the front of the supporting step, the circumferential surface of the positioning step radially positions the gasket, the positioning step protrudes out of the drill body part in front of the positioning step, and the tooth tip of the tooth is embedded into the surface of the drill body at the positioning step.

The rotary sleeve is rotatably connected with the front part of the drill body through the decorative cap and is positioned in the radial direction.

The inner periphery of the washer between the jaw relief holes is integrally embedded in the groove of the drill body surface.

The drill chuck is provided with a self-locking structure, and the self-locking structure comprises a spring piece and teeth on the drill body for matching; the front end of the nut is provided with a groove, the spring piece is connected with the groove at the front end of the nut, and the control structure for the spring piece is arranged on the inner wall of the main sleeve body.

Owing to adopt the technical scheme of the utility model, the utility model discloses assembly step is simple, does benefit to and reduces cost expert and guarantee the performance. The utility model discloses can fully guarantee drill chuck inner space on the basis that reduces the drill body material diameter, reduces drill chuck weight and cost, satisfy configuration installation, the location of each functional unit. The structure of the utility model can be applied to the drill chuck with self-locking function and the drill chuck without self-locking function.

Drawings

Fig. 1 is a half-sectional view of embodiment 1 of the present invention.

Fig. 2 is one of the schematic views of the decoration cap of embodiment 1 of the present invention.

Fig. 3 is a second schematic view of the decoration cap of embodiment 1 of the present invention.

Fig. 4 is a half-sectional view of embodiment 2 of the present invention.

Fig. 5 is an exploded view of embodiment 2 of the present invention.

Fig. 6 is a schematic view of a drill body according to embodiment 2 of the present invention.

Detailed Description

Example 1, refer to fig. 1, 2, 3.

The drill chuck comprises a rotary sleeve, a drill body 1, a nut 3, a washer 4, a bearing 5 and a clamping jaw 6, wherein the nut is in threaded connection with the clamping jaw, the drill body 1 is provided with an inclined clamping jaw hole 10 for the clamping jaw 6 to slide back and forth along the clamping jaw hole 10, and the washer 4 is supported on a step 11 in the middle of the drill body 1. The drill body 1 does not set up the nut groove, nut 3 is whole nut, overlaps on the outer periphery of the drill body 1, the swivel sleeve includes the main cover body 21 and metal casing 22, the main cover body 21 with whole nut 3 is connected, the swivel sleeve front end still sets up the decoration cap 23 of being made by the punching press of elastic plate, elastic plate can adopt 65Mn or stainless steel, the decoration cap is equipped with the centre bore to set up pothook 232 at the rear end of centre bore, the drill body 1 be close to front end department and set up round draw-in groove 14, the pothook 232 and the draw-in groove 14 joint of decoration cap 23, the centre bore wall 231 of decoration cap 23 is connected with drill body front end interference fit, the main cover body 21 and the metal casing 22 of swivel sleeve pass through the decoration cap 23 and the front portion in the axial is spacing. The main sleeve body 21 can be made of engineering plastics.

The inner side of the decoration cap 231 is bent into the center hole wall 231.

The lower portion of the center hole wall 231 is provided with a plurality of pieces 233 along the circumferential direction, and a space 234 is provided between the pieces 233, so that the radial elasticity of the hook 232 can be increased, and the hook 232 is provided at the end of the piece 233.

A circle of conical surface 12 is arranged on the outer side of the front end of the drill body 1; the decorative cap 23 is located immediately behind the conical surface, the front end of the main sleeve body 21 is shaped like a truncated cone, the decorative cap 23 is also shaped like a matched truncated cone, and is bent at the inner side to form the central hole wall 231 which is in clearance fit with the front cylinder 13 of the drill body and is in radial positioning fit with the front cylinder 13 of the drill body. The front end of the metal shell 22 is bent and fixed at the bottom of the main sleeve body in a cone frustum shape, and is limited by the decorative cap.

The main sleeve body 21 of the rotary sleeve only extends backwards to the gasket 4 in the axial direction, the rotary sleeve 2 is positioned with the rear end of the drill body in the radial direction through the rear cover 8 fixed with the rear part of the metal shell 22, more radial space is reserved for the clamping jaws 6 to retreat, and the requirement of the clamping jaws 6 on the movement space can be met under the condition that the overall diameter of the drill chuck is reduced.

The front axial positioning of the integral nut 3 is formed by the cooperation of the integral nut 3 and the main sleeve body 21, a corresponding limit matching step 211 can be arranged inside the main sleeve body 21, and the nut 3 is in radial positioning matching with the inner side wall 212 of the main sleeve body 21.

The following structure of the embodiment can be seen in fig. 5 and 6 of embodiment 2, the diameter of the drill body is reduced, and the washer 4 is provided with a clamping jaw abdicating hole 41 for the clamping jaw 6 to abdicate the forward and backward movement after the diameter of the drill body 1 is reduced; the inner periphery 42 of the gasket between the two clamping jaw abdicating holes 41 is in radial positioning fit with the drill body with the reduced diameter; a plurality of teeth 43 are arranged on the inner periphery of the gasket between the two jaw abdicating holes, and the tooth tips of the teeth 43 are embedded into the surface of the drill body, so that the gasket can be conveniently installed and has a circumferential rotation stopping function.

The drill body 1 is provided with a positioning step 16 at the front part of the supporting step 11, the circumferential surface of the positioning step 16 radially positions the gasket 4, the positioning step 16 protrudes out of the drill body part in front of the positioning step, and the tooth tip of the tooth 43 is embedded into the surface of the drill body at the positioning step. The radial positioning of the bearing 5 is not performed through the drill body 1, and the bearing frame of the bearing 5 is provided with a folded edge 51, and the folded edge 51 is matched with the inner wall of the main sleeve body and/or the nut 3 for radial positioning.

Example 2, refer to fig. 4, 5, and 6, and also refer to fig. 2 and 3.

In this embodiment, a self-locking structure is added on the basis of embodiment 1, and in this embodiment, the reference numerals are the same as those in embodiment 1 and have the same meanings.

In the embodiment shown, the self-locking mechanism comprises a spring plate 8 and teeth 17 on the drill body for matching; the front end of the nut 3 is provided with a groove 31, the spring piece 8 is connected with the groove 31 at the front end of the nut, and a control structure for the spring piece 8 is arranged on the inner wall of the main sleeve body 21.

The above description is only for the specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art is in the field of the present invention, and all the changes or modifications are covered in the protection scope of the present invention.

Claims

1. The drill chuck comprises a rotary sleeve, a drill body, a nut, a washer, a bearing and a clamping jaw, wherein the nut is in threaded connection with the clamping jaw; the novel rotary drill is characterized in that the drill body is not provided with a nut groove, the nut is a whole nut, the rotary sleeve is connected with the whole nut, the front end of the rotary sleeve is further provided with a decorative cap made of elastic plates through stamping, the decorative cap is provided with a center hole, the rear end of the center hole is provided with an elastic clamping hook, a circle of clamping groove is formed in the position, close to the front end, of the drill body, the clamping hook and the clamping groove of the decorative cap are clamped, the center hole wall of the decorative cap is connected with the front end of the drill body in an interference fit mode, and the front portion of the rotary sleeve in the axial direction is limited through the decorative cap.

2. The drill chuck according to claim 1, wherein the rotary sleeve includes a main sleeve body and a metal outer shell, and the decorative cap limits the axial front portions of the main sleeve body and the metal outer shell.

3. The drill chuck according to claim 1, wherein the inner side of said decorative cap is bent into said central hole wall.

4. The drill chuck according to claim 3, wherein the rear portion of the center hole wall is provided in a plurality of pieces in the circumferential direction with a space therebetween, and a hook is formed at the rear end of the piece.

5. The drill chuck as claimed in claim 2, characterized in that the outer side of the front end of the drill body is provided with a conical surface; the decorative cap is located immediately behind the conical surface, the front end of the main sleeve body is in a shape of a truncated cone, the outer side surface of the decorative cap is in a shape of an adaptive conical surface, the decorative cap is also in a shape of an adaptive conical frustum, and the front end of the metal shell is bent to be fixed at the bottom of the conical frustum of the main sleeve body and limited by the decorative cap.

6. The drill chuck as claimed in claim 1, wherein the elastic plate is 65Mn or stainless steel.

7. The drill chuck according to claim 2 wherein the main sleeve body of the rotary sleeve does not extend axially to an axial position corresponding to the rear ends of the jaws when the jaws are retracted to the extreme limit, and the rear portion of the metal shell of the rotary sleeve is radially positioned with the rear end of the drill body by a rear cap secured to the metal shell of the rotary sleeve.

8. The drill chuck according to claim 2, wherein the forward axial location of the integral nut is formed by the engagement of the integral nut with the main sleeve body, the nut being in radially located engagement with the main sleeve body.

9. The drill chuck according to claim 1, characterized in that the diameter of the drill body is reduced, the washer being provided with a jaw relief hole for the jaws; the inner periphery of a gasket between the two clamping jaw abdicating holes is in radial positioning fit with the surface of the drill body with the diameter being governed; a plurality of teeth are arranged on the inner periphery of the gasket between the jaw abdicating holes, and tooth tips of the teeth are embedded into the surface of the drill body;

the radial positioning of the bearing is not performed through the drill body, but performed through the cooperation of one or two of the washer, the main sleeve body and the nut;

10. The drill chuck according to claim 1, wherein said rotary sleeve is rotatably connected to the front portion of the drill body and radially positioned by means of a decorative cap.