CN211102757U

CN211102757U - Inner insert for drill chuck

Info

Publication number: CN211102757U
Application number: CN201922162813.1U
Authority: CN
Inventors: 彭韫臻
Original assignee: Suzhou Dhl Plastic Co ltd
Current assignee: Suzhou Dhl Plastic Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-07-28
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses an interior inserts for drill chuck, the cover is established outside the nut, include with nut keyway complex front cover, the front cover is the cavity column. The front sleeve outer wall is provided with a stress application assembly facilitating rotation of the front sleeve outer wall, the stress application assembly comprises a placing groove and a stress application rod, the placing groove is formed in the front sleeve outer wall, the stress application rod is axially arranged along the front sleeve, a rotating shaft is fixed in the placing groove, one end of the stress application rod is sleeved outside the rotating shaft and can rotate along the rotating shaft, the other end of the stress application rod is provided with a buckle, a clamping groove matched with the buckle is formed in the placing groove, a torsion spring assembly is further sleeved on the rotating shaft and comprises a torsion spring body and a first torsion spring arm and a second torsion spring arm, the two ends of the torsion spring assembly extend out of the torsion spring body, the torsion spring body is sleeved outside the rotating shaft, the first torsion spring arm is abutted against the placing groove, the second torsion spring arm is abutted against the stress application rod, when the buckle and the clamping groove are mutually locked, the stress application rod is fixed in the placing. The front sleeve is convenient to drive to rotate.

Description

Inner insert for drill chuck

Technical Field

The utility model relates to a clamping tool of drill bit, in particular to an inner insert for a drill chuck.

Background

In machining, a bench drill is widely used, and in order to machine different workpieces, it is often necessary to replace different drill bits. The drill chuck is a device for simply and quickly replacing the drill bit. The drill chuck is internally provided with a drill body, a clamping jaw and a nut, the nut is in threaded connection with the clamping jaw, a rotating sleeve (namely an inner insert) is arranged in the hand-tightened drill chuck, the rotating sleeve and the nut are directly or through a connecting structure, the nut is connected with the rotating sleeve in a key groove, interference and other modes, and the rotating sleeve can drive the nut to rotate. The rotary sleeve is operated by hand, and the nut is rotated by the rotary sleeve to drive the clamping jaw to move forwards or backwards so as to enable the clamping jaw to clamp or loosen the drill bit. In order to obtain a higher clamping force when clamping the drill bit, the rotary sleeve is often screwed tight. The existing hand-held drill chuck adopts a user to directly rotate a rotary sleeve, and the rotary sleeve can not rotate tightly due to uneven force of the user. And because the rotating direction is the same as the screwing direction of the rotating sleeve in the processing process, the rotating sleeve is screwed too tightly. After processing, lean on the manpower directly to rotate the swivel sleeve, the phenomenon of unable reverse unscrewing swivel sleeve can appear in the people that the strength is little, if adopt the instrument to press from both sides tight swivel sleeve and rotate, because the swivel sleeve is the injection molding, probably causes the damage to the swivel sleeve, and smooth silk easily brings adverse effect for the continuity of processing.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide an inner insert for a drill chuck.

In order to achieve the above purpose, the utility model discloses a technical scheme is: the inner insert for the drill chuck is sleeved outside the nut and comprises a front sleeve matched with a nut key groove, wherein the front sleeve is in a hollow cylindrical shape and is characterized in that: the outer wall of the front sleeve is provided with a stress application assembly facilitating rotation of the front sleeve, the stress application assembly comprises a placing groove and a stress application rod, the placing groove is arranged on the outer wall of the front sleeve and is axially arranged along the front sleeve, a rotating shaft is fixed in the placing groove, one end of the stress application rod is sleeved outside the rotating shaft and can rotate along the rotating shaft, the other end of the stress application rod is provided with a buckle, the placing groove is provided with a clamping groove matched with the buckle, the rotating shaft is further sleeved with a torsion spring assembly, the torsion spring assembly comprises a torsion spring body and a first torsion spring arm and a second torsion spring arm, the first torsion spring arm abuts against the placing groove, the second torsion spring arm abuts against the stress application rod, when the buckle and the clamping groove are locked with each other, the stress application rod is fixed in the placing groove, and after the buckle and the clamping groove are unlocked, the stress application rod is under the action of the torsion spring assembly, and the placing groove is turned upwards.

The beneficial effects of the utility model are that, add afterburning subassembly at the sleeve pipe outer wall, when needing to press from both sides tight drill bit, remove the locking of buckle and draw-in groove, the afterburning pole upwards overturns under the torsional spring effect, the perpendicular to front cover axial, at this moment, the front cover rotates when promoting the afterburning pole, utilizes lever principle, makes the sleeve pipe rotate more easily, and the drill bit presss from both sides tightly effectually, and dismantles under the locking state of being convenient for.

Preferably, the first torsion spring arm is L type, a groove is arranged on the bottom of the placing groove, and the first torsion spring arm is clamped in the groove.

Preferably, the stress application rod comprises a connecting portion and a force application portion which are integrated, the connecting portion is two separately arranged shaft sleeves, the shaft sleeves are sleeved on the rotating shaft, the torsion spring assembly is arranged between the two shaft sleeves, and the second torsion spring arm is abutted to the upper end face of the force application portion.

Preferably, the outer side surface of the force application part and the outer wall surface of the front sleeve are both provided with anti-skid grains. The hand-operated grip can apply force conveniently.

Preferably, the lower end face of the force application part is provided with an insertion hole for inserting the second torsion spring arm.

Preferably, the buckle and the stressing rod are an integral injection molding part.

Drawings

FIG. 1 is a half sectional view showing a state where a buckle with a shelf and a card slot are unlocked in the present embodiment;

FIG. 2 is an enlarged view of the embodiment A;

FIG. 3 is a side view of the present embodiment;

fig. 4 is a schematic view of the structure of the force applying rod in this embodiment.

In the figure:

100-nut, 200-front sleeve, 1-placing groove, 2-force applying rod, 21-connecting part, 22-force applying part, 3-rotating shaft, 4-buckle, 5-clamping groove, 6-torsion spring component, 61-torsion spring body, 62-first torsion spring arm, 63-second torsion spring arm and 7-anti-skid grain.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1-4, the inner insert for a drill chuck in the present embodiment is sleeved outside the nut 100, and includes a front sleeve 200 engaged with a keyway of the nut 100, where the front sleeve 200 is hollow and cylindrical. The front cover 200 is an injection molded part.

The outer wall of the front sleeve 200 is provided with a force application component which facilitates rotation of the front sleeve, and the force application component comprises a placing groove 1 and a force application rod 2. The placing groove 1 is arranged on the outer wall of the front sleeve 200 and is axially arranged along the front sleeve 200, the rotating shaft 3 is fixed in the placing groove 1, and the rotating shaft 3 is axially arranged perpendicular to the front sleeve 200. One end of the stress application rod 2 is sleeved outside the rotating shaft 3 and can rotate along the rotating shaft 3. The other end of the stress application rod 2 is provided with a buckle 4, and a clamping groove 5 matched with the buckle 4 is arranged on the placing groove 1.

The rotating shaft 3 is further sleeved with a torsion spring assembly 6, the torsion spring assembly 6 comprises a torsion spring body 61 and a first torsion spring arm 62 and a second torsion spring arm 63, the two ends of the torsion spring body 61 extend out, the torsion spring body 61 is sleeved outside the rotating shaft 3, the first torsion spring arm 62 is abutted against the placing groove 1, and the second torsion spring arm 63 is abutted against the force applying rod 2. The buckle 4 and the clamping groove 5 are mutually interlocked and timed, the force applying rod 2 is fixed in the placing groove 1, the force applying rod 2 is highly lower than the depth of the placing groove 1, the force applying rod 2 can be completely embedded into the placing groove 1, the front sleeve 200 rotates together with the drill bit when the drill bit works, and the force applying rod 2 does not protrude out of the front sleeve 200, so that the drill bit is convenient to rotate. After the buckle 4 and the clamping groove 5 are unlocked, the force applying rod 2 is turned upwards relative to the placing groove 1 under the action of the torsion spring assembly 6. The stress application rod 2 protrudes out of the placing groove 1 and is in a vertical state with the front sleeve 200, so that the outer sleeve can rotate conveniently, and a person with small strength can clamp a drill bit conveniently.

Add afterburning subassembly at the sleeve pipe outer wall, when needing to press from both sides tight drill bit, remove the locking of buckle 4 and draw-in groove 5, the upset that makes progress under the torsional spring effect of

stress beam

2, 200 axial of perpendicular to front cover, at this moment, front cover 200 rotates when promoting stress beam 2, utilizes lever principle, makes the sleeve pipe rotate more easily, and the drill bit presss from both sides tightly effectually. After the drill bit is clamped, the force applying rod 2 is pushed to overturn downwards, the clamping groove 5 is clamped by the buckle 4, and the push rod is completely embedded into the placing groove 1 and can be used. When the drill bit is loosened, the locking of the buckle 4 and the clamping groove 5 is released again, the force applying rod 2 is turned upwards to apply force to the force applying rod 2, and the front sleeve 200 is easier to rotate.

The first torsion spring arm 62 is L type, a groove is arranged at the bottom of the placing groove 1, and the first torsion spring arm 62 is clamped in the groove.

The stress application rod 2 comprises a connecting portion 21 and a force application portion 22 which are integrated, the connecting portion 21 is two separately arranged shaft sleeves which are sleeved on the rotating shaft 3, the torsion spring assembly 6 is arranged between the two shaft sleeves, and the second torsion spring arm 63 is abutted against the upper end face of the force application portion 22. The lower end surface of the force application portion 22 is provided with an insertion hole into which the second torsion spring arm 63 is inserted.

The outer side surface of the force application part 22 and the outer wall surface of the front sleeve 200 are both provided with anti-skid grains 7. The hand-operated grip can apply force conveniently.

The buckle 4 and the stressing rod 2 are integrated injection molding parts.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. A interior inserts for drill chuck, establish outside nut (100), include with nut (100) keyway complex front cover (200), front cover (200) are the cavity column, its characterized in that: the outer wall of the front sleeve (200) is provided with a force application assembly facilitating rotation of the front sleeve, the force application assembly comprises a placing groove (1) and a force application rod (2), the placing groove (1) is arranged on the outer wall of the front sleeve (200) and axially arranged along the front sleeve (200), a rotating shaft (3) is fixed in the placing groove (1), one end of the force application rod (2) is sleeved outside the rotating shaft (3) and can rotate along the rotating shaft (3), the other end of the force application rod (2) is provided with a buckle (4), a clamping groove (5) matched with the buckle (4) is arranged on the placing groove (1), the rotating shaft (3) is further sleeved with a torsion spring assembly (6), the torsion spring assembly (6) comprises a torsion spring body (61) and a first torsion spring arm (62) and a second torsion spring arm (63) extending out of two ends of the torsion spring body, the torsion spring body (61) is sleeved outside the rotating shaft (3), and the first torsion spring arm (62) is abutted against the bottom of the placing groove (1), the second torsion spring arm (63) is abutted against the force applying rod (2), the buckle (4) and the clamping groove (5) are mutually interlocked and timed, the force applying rod (2) is fixed in the placing groove (1), and after the buckle (4) and the clamping groove (5) are unlocked, the force applying rod (2) is opposite to the placing groove (1) to be upwards overturned under the action of the torsion spring assembly (6).

2. The inlay for a drill chuck according to claim 1, characterized in that the first torsion spring arm (62) is L type, the bottom of the placing groove (1) is provided with a groove, the first torsion spring arm (62) is caught in the groove.

3. The inlay for a drill chuck according to claim 1, wherein: the stress application rod (2) comprises a connecting portion (21) and a force application portion (22) which are integrated, the connecting portion (21) is two shaft sleeves which are separately arranged, the shaft sleeves are sleeved on the rotating shaft (3), the torsion spring assembly (6) is arranged between the two shaft sleeves, and the second torsion spring arm (63) is abutted against the lower end face of the force application portion (22).

4. The inlay for a drill chuck according to claim 3, wherein: the side surface of the force application part (22) and the surface of the outer wall of the front sleeve (200) are both provided with anti-skid grains (7).

5. The inlay for a drill chuck according to claim 3, wherein: the lower end face of the force application part (22) is provided with an insertion hole for inserting the second torsion spring arm (63).

6. The inlay for a drill chuck according to claim 1, wherein: the buckle (4) and the stressing rod (2) are integrated into an injection molding piece.