CN213827182U - Drill chuck - Google Patents
Drill chuck Download PDFInfo
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- CN213827182U CN213827182U CN202022124547.6U CN202022124547U CN213827182U CN 213827182 U CN213827182 U CN 213827182U CN 202022124547 U CN202022124547 U CN 202022124547U CN 213827182 U CN213827182 U CN 213827182U
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- ring
- steel cap
- locking
- end steel
- drill
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Abstract
The utility model provides a drill chuck, its front end steel cap set up elastic snap ring, snap ring locked groove, drill chuck set up and cooperate with the snap ring locked groove and lock the structure of snap ring, the front end steel cap passes through the snap ring is connected to on the brill body, the swivel sleeve passes through the front end steel cap and bores the anterior rotation of body and be connected and radial positioning to it is spacing at the ascending front portion of axial. The utility model has simple assembly steps, the front end steel cap can conveniently install the retainer ring to facilitate the connection and installation between the front end steel cap and the drill body, and the retainer ring is prevented from appearing outside the front end of the drill chuck; 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.
Description
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, a rotary sleeve and a front end steel cap, wherein the nut is in threaded connection with the clamping jaw, the rotary sleeve is connected with the nut, a washer is arranged on a step of the drill body behind the nut, the nut is supported on the washer through a bearing, and the rotary sleeve is operated by hand, so that the nut is rotated to drive the clamping jaw to move forwards or backwards to enable the clamping jaw to clamp or loosen the drill bit. Generally, the axial limiting of the drill chuck is realized by arranging a clamp spring groove on a drill body and installing a clamp spring for limiting, or by directly pressing an end cap into the front end of the drill body in an interference manner for axially limiting. Along with the development of the drill chuck industry, the requirements on the appearance of the drill chuck are higher and higher, and a new requirement appears, namely the outer side of the front end of the drill chuck is not allowed to have a clamping spring with a limiting function, a clamping ring and an end cap or a sleeve with a limiting function, so that the drill chuck is more attractive.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a drill chuck is provided, it is rational in infrastructure, front end steel cap can conveniently install adapting unit and be convenient for and bore the body between the connection installation, avoid the jump ring to appear in the front end outside of drill chuck. Therefore, the utility model adopts the following technical scheme:
a drill chuck comprises a rotary sleeve, a drill body, a nut, a washer, a bearing and a clamping jaw which are positioned in the radial direction, wherein the nut is in threaded connection with the clamping jaw; the drill chuck is characterized in that a front end steel cap is arranged at the front end of the rotary sleeve, a clamping ring locking groove is formed in the front end steel cap, an elastic clamping ring is installed on the front end steel cap, the drill chuck is provided with a structure matched with the clamping ring locking groove to lock the clamping ring, the front end steel cap is connected to a drill body through the clamping ring, and the front portion of the front end steel cap in the axial direction is limited.
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 front end steel cap is provided with a central hole wall, the central hole wall is provided with the snap ring locking groove, and the inner cylinder wall is sleeved outside the outer circle of the front part of the drill body.
The elastic clamping ring is an open non-closed ring, a plurality of radial protrusions are arranged on the inner periphery of the ring, a clamping ring locking groove which is matched with the protrusions in a one-to-one correspondence mode and is opened towards the rear is formed in the wall of the central hole, the clamping ring locking groove is axially formed in the top of the wall of the central hole, a clamping groove matched with the protrusions is formed in the tail end of the clamping groove, the front end steel cap is opened towards the rear, the clamping ring is placed into the rear portion of the front end steel cap, and after installation, the protrusions are clamped into an annular groove in the front portion of the drill body.
The front end of the central hole wall of the rotary sleeve is provided with the locking snap ring structure.
Elastic snap ring is open-ended non-closed ring, and the interior periphery of ring sets up the radial arch of a plurality of, set up on the central pore wall with protruding one-to-one complex open snap ring locked groove to the rear, the snap ring locked groove sets up the top to the central pore wall along the axial, the front end steel cap is provided with the structure that is used for pinning the snap ring, the snap ring utilizes protruding and the spacing cooperation of the extreme in snap ring locked groove, the structure that is used for pinning the snap ring on the front end steel cap blocks the arch on the snap ring at the rear.
The structure that is used for pinning the snap ring on the front end steel cap is: and the part of the central hole wall, which is originally positioned in the snap ring locking groove, is formed by outwards bending the residual part when the snap ring locking groove is formed by punching.
The outer side of the front end of the drill body is provided with a conical surface; the front end steel cap is located behind the conical surface, the rotary sleeve comprises a main sleeve body and a metal shell, the front end of the main sleeve body is in a cone frustum shape, the front end steel cap is also in a matched cone frustum shape, and the front end steel cap is bent to be a central hole wall which is in clearance fit with the drill body and is in radial positioning fit with the drill body on the inner side.
The drill body is not provided with a nut groove, the nut is an integral nut, the rotating sleeve is connected with the integral nut,
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 location of the integral nut is formed by the cooperation of the integral nut and the rotating sleeve, the nut is in radial location cooperation with the rotating sleeve, and the diameter of the drill body is reduced to have a certain interval with the nut.
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 gasket is provided with a clamping jaw abdicating hole for the clamping jaw; the inner periphery of a gasket between the two jaw abdicating holes is in radial positioning fit with the drill body; and a plurality of teeth are arranged on the inner periphery of the gasket between the jaw abdicating holes, and the tooth tips of the teeth are embedded in the surface of the drill body.
The inner periphery of the washer between the jaw relief holes is integrally embedded in the groove of the drill body surface.
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 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.
By adopting the technical proposal of the utility model, the assembly steps are simple, the front end steel cap can be conveniently provided with the retainer ring so as to be convenient for connecting and installing with the drill body, and the retainer ring is prevented from appearing outside the front end of the drill chuck; 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 an exploded view of embodiment 1 of the present invention.
Fig. 2 is a half-sectional view of embodiment 1 of the present invention.
Fig. 3 is a schematic view of a front end steel cap according to embodiment 1 of the present invention.
Fig. 4 is a schematic view of a snap ring according to embodiment 1 of the present invention.
Fig. 5 is a schematic view of a rotary sleeve body according to embodiment 1 of the present invention.
Fig. 6 is a schematic view of a snap ring according to embodiment 2 of the present invention.
Fig. 7 is a schematic view of a front end steel cap according to embodiment 2 of the present invention.
Detailed Description
Example 1, refer to FIGS. 1 to 5
The utility model provides a drill chuck, including radial positioning's swivel mount 2, bore body 1, nut 3, packing ring 4, bearing 5 and clamping jaw 6, bore the body and set up the clamping jaw hole 10 of slope and supply clamping jaw 6 to slide around clamping jaw hole 10, packing ring 4 supports on the step 11 at the middle part of boring the body 1. The drill body is not provided with a nut groove, the nut is an integral nut, the rotary sleeve 2 comprises a main sleeve body 21 and a metal shell 22, the main sleeve body 21 is connected with the integral nut 3, the front end of the rotary sleeve is further provided with a front end steel cap 23, the rotary sleeve is rotatably connected with the front part of the drill body through the front end steel cap 23, and the front part in the axial direction is limited. The main sleeve body 21 can be made of engineering plastics.
The front end steel cap 23 is provided with a clamping ring locking groove 231 and an elastic clamping ring 9, the drill chuck is provided with a structure matched with the clamping ring locking groove to lock the clamping ring, and the front end steel cap 23 is connected to the drill body 1 through the clamping ring 9.
The front end steel cap 23 is provided with a central hole wall 232, and the front end steel cap 23 is sleeved outside the front excircle of the drill body 1 through the central hole wall 232.
The main sleeve body 21 of the rotating sleeve is provided with a center hole wall 211 of the rotating sleeve, the front end of the center hole wall 211 is provided with the structure for locking the snap ring, and the structure can be a block body 212 which is matched with the snap ring locking groove 231 and can be embedded into the snap ring locking groove 231. The radial positioning of the rotating sleeve 2 can also be realized by the matching of the block 212 and the front excircle of the drill body, or can be realized by the matching of the central hole wall 232 of the front end steel cap and the excircle of the drill body.
A circle of conical surface 12 is arranged on the outer side of the front end of the drill body 1; the front end steel cap 23 is located immediately behind the conical surface, the front end of the main sleeve body 21 is in a cone frustum shape, and the front end steel cap 23 is also in a matched cone frustum shape.
The main sleeve body 21 of the rotary sleeve 2 only extends backwards to the gasket 4 in the axial direction, the rotary sleeve 2 is matched and positioned with the rear end of the drill body in the radial direction through a rear cover 7 fixed to the rear portion of the metal shell 22, more radial spaces are reserved for the clamping jaws 6 to retreat, and the requirements 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 213 can be arranged in the main sleeve body 21, the nut 3 is in radial positioning matching with the inner side wall 214 of the main sleeve body 21, the drill body 1 does not directly perform radial positioning on the nut 3, the diameter of the drill body 1 is reduced, and a certain interval 15 is formed between the drill body 1 and the nut 3. 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 which is matched with the inner wall of the main sleeve body and/or the nut 3 through the folded edge 51 for radial positioning.
The gasket 4 is provided with a clamping jaw abdicating hole 41 for abdicating the forward and backward movement of the clamping jaw 6 after the diameter of the drill body 1 is reduced; the inner periphery 42 of the gasket between the two jaw abdicating holes 41 forms radial positioning fit with the drill body; 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 inner periphery of the washer between the two jaw relief holes 41 may be integrally embedded in a groove in the surface of the drill body to facilitate installation.
The drill body is provided with a positioning step 16 at the front part of the supporting step, the peripheral 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 structure of the utility model can be suitable for a drill chuck without self-locking function and also can be suitable for a drill chuck with self-locking function. As shown in the figure, in the present embodiment, the drill chuck is provided with a self-locking structure, and the self-locking structure comprises a spring piece 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.
Example 2, refer to fig. 6 and 7.
In this embodiment, the structure of the snap ring and the locking snap ring by cooperating with the snap ring locking groove is changed.
The front end steel cap 23b is provided with a central hole wall 232b, and the front end steel cap 23b is sleeved outside the front excircle of the drill body 1 through the central hole wall 232 b.
The elastic clamping ring 9b is an open non-closed ring, a plurality of radial protrusions 90b are arranged on the inner periphery of the ring, clamping ring locking grooves 231b which are matched with the protrusions 90b in a one-to-one correspondence mode and are open towards the rear are arranged on the wall 232b of the central hole, the clamping ring locking grooves 231b are axially arranged at the top of the wall 232b of the central hole and are used for allowing the protrusions 90b to pass through when the clamping ring is installed, the front-end steel cap 23b is provided with protrusions 234b used for locking the clamping ring, the clamping ring 9b is in limit fit with the extreme ends of the protrusions 90b and the clamping ring locking grooves 231b, and the protrusions 90b are blocked at the rear of the protrusions 234b on the front-end steel cap 23b so as to be matched with the clamping ring locking grooves 231b to lock the clamping ring 9 b.
The front end steel cap 23b is connected to the drill body 1 via the snap ring 9 b.
The protrusion 234b may be an outward protrusion from the central hole wall 232b, and when the locking device is installed, the snap ring 9b is opened by its own elasticity, bypasses the outer side of the protrusion 234b, and then is retracted, so that the protrusion 90b is locked in the snap ring locking groove 231 b. The protrusion 234b may also be a portion of the center hole wall 232b originally located in the snap ring locking groove 231b, and a remaining portion of the center hole wall is bent outward when the snap ring locking groove is formed by punching, thereby facilitating manufacturing.
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 (10)
1. A drill chuck comprises a rotary sleeve, a drill body, a nut, a washer, a bearing and a clamping jaw which are positioned in the radial direction, wherein the nut is in threaded connection with the clamping jaw; the drill chuck is characterized in that a front end steel cap is arranged at the front end of the rotary sleeve, a clamping ring locking groove is formed in the front end steel cap, an elastic clamping ring is installed on the front end steel cap, the drill chuck is provided with a structure matched with the clamping ring locking groove to lock the clamping ring, the front end steel cap is connected to a drill body through the clamping ring, and the front portion of the front end steel cap in the axial direction is limited.
2. The drill chuck according to claim 1, wherein the front end steel cap is provided with a center hole wall, the center hole wall is provided with the snap ring locking groove, and the center hole wall is sleeved outside the outer circle of the front part of the drill body.
3. The drill chuck as claimed in claim 2, wherein the resilient locking ring is an open non-closed ring, a plurality of radial protrusions are provided on the inner periphery of the ring, locking grooves which are opened backward and are engaged with the protrusions one by one are provided on the wall of the central hole, the locking grooves are provided to the top of the wall of the central hole along the axial direction, and a locking groove which is engaged with the protrusions is provided at the extreme end, the front end steel cap is opened backward, the locking ring is placed into the front end steel cap from the rear of the front end steel cap, and after installation, the protrusions are locked into the annular groove at the front of the drill body.
4. The drill chuck as claimed in claim 1, wherein said locking snap ring is provided at a front end of a wall of a center hole of said rotary sleeve.
5. The drill chuck as claimed in claim 2, wherein the resilient locking ring is an open non-closed ring, a plurality of radial protrusions are provided on the inner periphery of the ring, a locking groove of the locking ring is provided on the wall of the central hole, the locking groove of the locking ring is opened backward and is engaged with the protrusions in a one-to-one correspondence manner, the locking groove of the locking ring is provided to the top of the wall of the central hole along the axial direction, the front end steel cap is provided with a structure for locking the locking ring, the locking ring is engaged with the locking groove of the locking ring at the extreme ends thereof in a spacing manner, and the structure for locking the locking ring on the front end steel cap is used for blocking.
6. The drill chuck as claimed in claim 5, wherein the structure for locking the snap ring on the front end steel cap is: and the part of the central hole wall, which is originally positioned in the snap ring locking groove, is formed by outwards bending the residual part when the snap ring locking groove is formed by punching.
7. A drill chuck according to claim 1, 2, 3, 4, 5 or 6, characterized in that the outer side of the front end of the drill body is provided with a conical surface; the front end steel cap is located behind the conical surface, the rotary sleeve comprises a main sleeve body and a metal shell, the front end of the main sleeve body is in a cone frustum shape, the front end steel cap is also in a matched cone frustum shape, and the front end steel cap is bent to be a central hole wall which is in clearance fit with the drill body and is in radial positioning fit with the drill body on the inner side.
8. A drill chuck according to claim 1, wherein said drill body is not provided with a nut groove, said nut is an integral nut, and said rotary sleeve is connected to said integral nut.
9. The drill chuck according to claim 7, wherein the main sleeve body of the rotary sleeve is axially positioned so as not to extend to an axial position corresponding to the rear end of the chuck jaws when the chuck jaws are retracted to the extreme limit position, and the rear portion of the metal shell of the rotary sleeve is radially positioned with respect to the rear end of the drill body by a rear cover fixed thereto.
10. A drill chuck according to claim 8, wherein the forward axial location of said integral nut is defined by the engagement of the integral nut with the rotatable sleeve, said nut being radially located in engagement with the rotatable sleeve, the diameter of the drill body being reduced to a distance from the nut;
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 gasket is provided with a clamping jaw abdicating hole for the clamping jaw; the inner periphery of a gasket between the two jaw abdicating holes is in radial positioning fit with the drill body; and a plurality of teeth are arranged on the inner periphery of the gasket between the jaw abdicating holes, and the tooth tips of the teeth are embedded in the surface of the drill body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022124547.6U CN213827182U (en) | 2020-09-24 | 2020-09-24 | Drill chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022124547.6U CN213827182U (en) | 2020-09-24 | 2020-09-24 | Drill chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213827182U true CN213827182U (en) | 2021-07-30 |
Family
ID=77005838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022124547.6U Active CN213827182U (en) | 2020-09-24 | 2020-09-24 | Drill chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213827182U (en) |
-
2020
- 2020-09-24 CN CN202022124547.6U patent/CN213827182U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |