阅读说明：本技术 用于牙科低速手机的阶形钩后置式车针夹持装置 (Stepped hook rear-mounted type needle clamping device for dental low-speed handpiece ) 是由 张帆 解辽波 于 2019-12-12 设计创作，主要内容包括：提供一种用于牙科低速手机的阶形钩后置式车针夹持装置,将设于夹头后轴右端的拔销两端穿过转动轴上的长槽孔并伸入滑动套内壁上的长槽内,阶形钩后置式双端卡爪夹头右端与夹头后轴内壁钩挂连接,且空腔内壁上制有限位台,滑动套左右移动由拔销推动或拉动夹头后轴向左或向右移动后,实现阶形钩后置式双端卡爪夹头两端对车针的夹持或松开。本发明解决了阶形钩后置式双端卡爪夹头左端外锥面与夹头前轴内锥面分离不彻底的现象,有利于阶形钩后置式双端卡爪夹头与夹头后轴适配的锥形面的分离,夹紧结构设计新颖,夹持力满足车针夹持要求,车针夹持拆换方便快捷,用户体验效果好。(The stepped hook rear-mounted type lathe needle clamping device for the dental low-speed handpiece is characterized in that two ends of a pull pin arranged at the right end of a chuck rear shaft penetrate through a long groove hole in a rotating shaft and extend into a long groove in the inner wall of a sliding sleeve, the right end of a stepped hook rear-mounted type double-end clamping jaw chuck is connected with the inner wall of the chuck rear shaft in a hooking mode, a limiting table is arranged on the inner wall of a cavity, the sliding sleeve moves leftwards and rightwards and is pushed or pulled by the pull pin to move leftwards or rightwards, and then clamping or loosening of the two ends of the stepped hook rear-mounted type double-end. The invention solves the problem that the left-end outer conical surface of the step-hook rear-mounted double-end claw chuck is not completely separated from the inner conical surface of the front chuck shaft, is beneficial to separating the conical surface matched with the rear chuck shaft from the step-hook rear-mounted double-end claw chuck, has novel clamping structure design, meets the clamping requirement of a needle by clamping force, is convenient and quick to clamp and disassemble the needle, and has good user experience effect.)

1. A step hook postposition type car needle clamping device for dentistry low-speed cell-phone, including axis of rotation (1) and clearance fit slip cap (2) on axis of rotation (1), its characterized in that: the clamp is characterized in that a clamping spring (4) is installed in a cavity (3) of a rotating shaft (1), the left side of the clamping spring (4) is sequentially provided with a chuck rear shaft (8) in clearance fit with the cavity (3), a step hook rear double-end chuck (9) and a chuck front shaft (10) of which the left end extends out of the cavity (3), two ends of a pulling pin (6) arranged at the right end of the chuck rear shaft (8) penetrate through a long groove hole (5) in the rotating shaft (1) and extend into a long groove (7) in the inner wall of a sliding sleeve (2), a spring (12) positioned between the left end of the sliding sleeve (2) and the step surface in a fixed sleeve (11) is sleeved on the rotating shaft (1), outer conical surfaces at the left end and the right end of the step hook rear double-end chuck (9) are respectively matched with inner conical surfaces of the chuck front shaft (10) and the chuck rear shaft (8), the right end of the step hook rear chuck (9) is connected with the inner wall of the, and a limiting table (21) is arranged on the inner wall of the cavity (3), a lathe needle (13) penetrates through the chuck front shaft (10) and the stepped hook rear-mounted double-end claw chuck (9) to extend into the chuck rear shaft (8), the sliding sleeve (2) moves left and right and is pushed or pulled by the pulling pin (6) to move left or right, and then clamping or loosening of the lathe needle (13) by two ends of the stepped hook rear-mounted double-end claw chuck (9) is achieved.

2. The stepped hook rear set needle holder for dental low speed handpiece of claim 1, characterized in that: the stepped hook rear-mounted double-end claw chuck (9) is of a claw type structure with a plurality of open grooves formed in the outer wall surface of a conical surface at the two ends, the stepped hook (14) is formed by a stepped platform arranged on the conical outer wall at the right end of the stepped hook rear-mounted double-end claw chuck (9), an inner conical surface on the inner wall at the left end of the chuck rear shaft (8) and a straight hole at the left end of the chuck rear shaft form an inner stepped surface (15), the stepped hook (14) is hooked on the inner stepped surface (15), and the chuck rear shaft (8) is pulled by the sliding sleeve (2) to move rightwards to loosen the needle (13) at the two ends of the stepped hook rear-mounted double-end claw chuck (9).

3. The stepped hook rear set needle holder for dental low speed handpiece of claim 2, characterized in that: the outer circumferential wall of the chuck front shaft (10) is provided with a positioning table (16) for positioning the left-right moving position of the chuck front shaft (10), and the positioning table (16) is positioned on the left side of the rotating shaft (1).

4. The stepped hook rear-mount type needle holding device for a dental low-speed handpiece according to claim 1, 2 or 3, wherein: and an inner water channel (20) which is communicated with each other and is used for connecting external cooling water is arranged in a tail sleeve (17), a locking sleeve (18) and a head shell (19) which are arranged at the periphery of the rotating shaft (1) and form a shell of the dental handpiece.

Technical Field

The invention belongs to the technical field of oral medical instruments, and particularly relates to a stepped hook rear-mounted type needle clamping device for a dental low-speed handpiece.

Background

The dental handpiece with the low-speed needle is driven by a mechanical transmission mode to rotate the clamped needle at a low speed, the rotating speed of the needle is generally hundreds of revolutions per minute to twenty thousand revolutions per minute, the rotating speed is relatively low, the torsion is large, and the dental handpiece is suitable for drilling patient teeth or performing treatment operations such as coarse grinding, coarse polishing and the like on stainless steel false teeth. The dental low-speed handpiece lathe needle clamping structure is an important composition structure of a dental low-speed handpiece, at present, the lathe needle clamping structure in the dental low-speed handpiece in the market is a single-end clamping jaw clamping structure, when a traditional single-end clamping jaw clamps a lathe needle, the clamping force is small, the lathe needle clamping requirement cannot be met, in order to meet the lathe needle clamping requirement, the clamping needs large clamping spring force and clamping area, and the clamping is very laborious when the clamping jaw is opened, namely the clamping force is increased, the disassembly of the lathe needle is not facilitated, and the user experience is not good; the adoption of the chuck stepped hook front-mounted lathe needle clamping device for the dental low-speed handpiece can solve the problems, but when the lathe needle is replaced, the finding is that when the rear clamping force of the double-end jaw chuck is larger than the front clamping force, the conical surfaces at the two ends of the double-end jaw chuck can be smoothly separated from the inner conical surfaces of the front chuck shaft and the rear chuck shaft, but when the rear clamping force of the double-end jaw chuck is smaller than the front clamping force, the jaw at the rear end of the double-end jaw chuck is completely opened, but the stepped hook at the left end of the jaw double-end jaw chuck at the front end is hooked and connected with the inner wall of the front chuck shaft, so that after the rear end of the double-end jaw chuck is completely separated from the rear chuck shaft, the front end of the double-end jaw chuck cannot be pulled to be separated from the front chuck shaft, and the phenomenon of incomplete opening of the double-end jaw exists, so that when the lathe needle is replaced, the lathe needle needs to be, replacement is inconvenient and therefore, there is a need to improve the above-mentioned drawbacks.

Disclosure of Invention

The technical problems solved by the invention are as follows: the utility model provides a step hook rear-mounted car needle clamping device for dentistry low-speed cell-phone, the phenomenon that the outer conical surface of step hook rear-mounted bi-polar jack catch chuck left end and chuck front axle inner conical surface separate not thoroughly has been solved, spacing platform on locating the cavity inner wall is spacing to step hook rear-mounted bi-polar jack catch chuck right shift position, it breaks away from chuck front axle inner taper hole to avoid step hook rear-mounted bi-polar jack catch chuck left end, press from both sides tight structural design novelty, clamping force satisfies the car needle centre gripping requirement, the car needle centre gripping is torn open and is traded convenient and fast, user experience is effectual.

The technical scheme adopted by the invention is as follows: a stepped hook rear-mounted type needle clamping device for a dental low-speed handpiece comprises a rotating shaft and a sliding sleeve in clearance fit with the rotating shaft, a clamping spring is mounted in a cavity of the rotating shaft, a chuck rear shaft in clearance fit with the cavity, a stepped hook rear-mounted type double-end jaw chuck and a chuck front shaft of which the left end extends out of the cavity are sequentially arranged on the left side of the clamping spring, two ends of a pulling pin arranged at the right end of the chuck rear shaft penetrate through a long groove hole in the rotating shaft and extend into a long groove in the inner wall of the sliding sleeve, a spring positioned between the left end of the sliding sleeve and the inner surface of a step in a fixed sleeve is sleeved on the rotating shaft, outer conical surfaces at the left end and the right end of the stepped hook rear-mounted type double-end jaw chuck are respectively matched with inner conical surfaces of the chuck front shaft and the chuck rear shaft, the right end of the stepped hook, the needle penetrates through the chuck front shaft and the stepped hook rear-mounted double-end claw chuck to extend into the chuck rear shaft, the sliding sleeve moves left and right and is pushed or pulled by the pulling pin to move left and right axially, and then clamping or loosening of the needle by two ends of the stepped hook rear-mounted double-end claw chuck is achieved.

The stepped hook rear-mounted double-end claw chuck is of a claw-type structure with a plurality of open grooves formed in the outer conical wall surfaces of the two ends, the stepped hook is formed by a stepped platform arranged on the outer conical wall of the right end of the stepped hook rear-mounted double-end claw chuck, an inner conical surface on the inner wall of the left end of the chuck rear shaft and a straight hole in the left end of the chuck rear shaft form an inner stepped surface, the stepped hook is hooked on the inner stepped surface, and the chuck rear shaft is pulled to move right through the sliding sleeve to loosen the needle at the two ends of the stepped hook rear-mounted double-end claw chuck.

Furthermore, a positioning table for positioning the left-right moving position of the front chuck shaft is arranged on the outer circumferential wall of the front chuck shaft and is positioned on the left side of the rotating shaft.

Furthermore, an inner water channel which is communicated with each other and used for connecting external cooling water is arranged in a tail sleeve, a locking sleeve and a head shell which are arranged at the periphery of the rotating shaft and form a shell of the dental handpiece.

Compared with the prior art, the invention has the advantages that:

1. according to the technical scheme, the sliding sleeve moves left and right, the pulling pin pushes or pulls the chuck rear shaft and the stepped hook rear-mounted double-end claw chuck to move left or right, clamping or loosening of the two ends of the stepped hook rear-mounted double-end claw chuck on the needle is achieved, the needle clamping structure is simple, and operation is convenient and rapid;

2. the technical scheme includes that two sections of stepped hook rear-mounted double-end jaw chucks with conical structures are adopted, the right ends of the stepped hook rear-mounted double-end jaw chucks are connected with the inner wall of a chuck rear shaft in a hooking mode, the problem that the outer conical surface of the left end of the stepped hook rear-mounted double-end jaw chuck is not completely separated from the inner conical surface of a chuck front shaft is effectively solved, the right displacement position of the stepped hook rear-mounted double-end jaw chuck is limited by a limiting step arranged on the inner wall of a cavity, and the left end of the stepped hook rear-mounted double-end jaw chuck is prevented from being separated from an inner conical hole of the;

3. the technical scheme is beneficial to the stable clamping of the needle, the needle withdrawing and clamping stroke of the stepped hook rear-mounted double-end clamping jaw is small, the needle dismounting and clamping efficiency is high, and the clamping structure is compact;

4. according to the technical scheme, on the premise that the clamping force required by clamping the needle by two ends of the stepped hook rear-mounted double-end clamping jaw is met, the spring force of a required clamping spring is reduced, the force for opening the stepped hook rear-mounted double-end clamping jaw is reduced, the structure of the stepped hook rear-mounted double-end clamping jaw is small, the internal space of the dental handpiece is saved, and the weight of the dental handpiece is reduced;

5. this technical scheme presss from both sides tight structural design novelty, and the clamping-force satisfies the car needle centre gripping requirement, and the car needle centre gripping is torn open and is traded convenient and fast, and user experience is effectual.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention installed in a dental handpiece;

FIG. 2 is a schematic view of the structure of the needle holder of the present invention;

FIG. 3 is a perspective exploded view of the needle holder of the present invention.

Detailed Description

In the following, an embodiment of the present invention will be described in conjunction with fig. 1 to 3, so as to clearly and completely describe the technical solution, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The stepped hook rear-mounted type lathe needle clamping device for the dental low-speed handpiece comprises a rotating shaft 1 and a sliding sleeve 2 in clearance fit with the rotating shaft 1, a clamping spring 4 is installed in a cavity 3 of the rotating shaft 1, a chuck rear shaft 8 in clearance fit with the cavity 3, a stepped hook rear-mounted type double-end claw chuck 9 and a chuck front shaft 10 of which the left end extends out of the cavity 3 are sequentially arranged on the left side of the clamping spring 4, two ends of a pull pin 6 arranged at the right end of the chuck rear shaft 8 penetrate through a long groove hole 5 in the rotating shaft 1 and extend into a long groove 7 in the inner wall of the sliding sleeve 2, a spring 12 positioned between the left end of the sliding sleeve 2 and a stepped surface in a fixed sleeve 11 is sleeved on the rotating shaft 1, outer conical surfaces at the left end and the right end of the stepped hook rear-mounted type double-end claw chuck 9 are respectively matched with inner conical surfaces of the chuck front shaft 10 and the chuck rear shaft 8, the right end of, in the structure, when the sliding sleeve 2 moves leftwards, the pull pin 6 pushes the chuck rear shaft 8 to move leftwards, so that the stepped hook rear double-end chuck 9 and the chuck front shaft 10 move to clamping positions, namely after outer conical surfaces at two ends of the stepped hook rear double-end chuck 9 respectively abut against inner conical surfaces of the chuck rear shaft 8 and the chuck front shaft 10, two ends of the stepped hook rear double-end chuck 9 clamp and fix the needle 13; when the sliding sleeve 2 moves rightwards, the chuck rear shaft 8 is pulled rightwards through the pulling pin 6, under the action of the positioning table 16, the stepped hook rear-type double-end chuck 9 with the conical outer wall surface at the right end separated from the inner conical surface of the chuck rear shaft 8 pulls the stepped hook rear-type double-end chuck 9 to move rightwards under the connection of the stepped hook 14 and the inner stepped surface 15, so that the outer conical surface at the left end of the stepped hook rear-type double-end chuck 9 is separated from the inner conical surface of the chuck front shaft 10, the chuck rear-type double-end chuck 9 stops after the stepped surface at the right end of the stepped hook rear-type double-end chuck 9 abuts against the limiting table 21, the stepped hook 14 is hooked and connected with the inner stepped surface 15 on the chuck rear shaft 8, the two ends of the stepped hook rear-type double-end chuck 9 are sequentially separated from the inner conical surfaces of the chuck front shaft 10 and the chuck rear shaft 8, and smooth replacement of; specifically, the stepped hook rear-mounted double-end jaw chuck 9 is of a jaw-type structure, the outer conical wall surfaces of two ends of the jaw-type structure are provided with a plurality of open grooves, the stepped hook 14 is formed by a stepped platform arranged on the conical outer wall of the right end of the stepped hook rear-mounted double-end jaw chuck 9, an inner conical surface on the inner wall of the left end of the chuck rear shaft 8 and a straight hole at the left end of the chuck rear shaft form an inner stepped surface 15, the stepped hook 14 is hooked on the inner stepped surface 15, and the chuck rear shaft 8 is pulled by the sliding sleeve 2 to move right to loosen the needle 13 at two ends of the stepped hook rear-mounted double-end jaw chuck 9; specifically, a positioning table 16 for positioning the left-right moving position of the chuck front shaft 10 is arranged on the outer circumferential wall of the chuck front shaft 10, and the positioning table 16 is positioned on the left side of the rotating shaft 1; specifically, a tail sleeve 17, a locking sleeve 18 and a head shell 19 which are arranged at the periphery of the rotating shaft 1 and form a shell of the dental handpiece are internally provided with an inner water channel 20 which is communicated with each other and is used for connecting external cooling water.

When the needle 13 is installed or replaced, an operator rotates the locking sleeve 18 anticlockwise, the locking sleeve 18 drives the sliding sleeve 2 to move rightwards under the matching of the steel balls and the spiral grooves, at the moment, in the right moving process, the outer conical surface of the right end of the stepped hook rear-mounted double-end claw chuck 9 is separated from the inner conical surface of the chuck rear shaft 8, under the pulling of the inner stepped surface 15 of the chuck rear shaft 8, the conical outer wall of the left end of the stepped hook rear-mounted double-end claw chuck 9 is separated from the inner conical surface of the chuck front shaft 10, at the moment, claws at the left end and the right end of the stepped hook rear-mounted double-end claw chuck 9 are completely opened, at the moment, the needle 13 can be installed or replaced, and when the sliding sleeve 12 moves rightwards, the operator can easily rotate the locking sleeve 18 under the action of the spring 12, and the.

When the needle 13 is clamped and fastened, after the claws at the left end and the right end of the stepped hook rear-mounted double-end claw chuck 9 are completely opened according to the steps, the needle 13 penetrates through the chuck front shaft 10 and the stepped hook rear-mounted double-end claw chuck 9 and extends into the chuck rear shaft 8, the locking sleeve 18 is loosened by hand, the sliding sleeve 2 is abutted against the pulling pin 6 to move leftwards under the restoring force of the clamping spring 4, so that the outer conical surfaces at the two ends of the stepped hook rear-mounted double-end claw chuck 9 are respectively pressed by the inner conical surfaces of the chuck rear shaft 8 and the chuck front shaft 10, and the needle 13 is clamped by the claws at the left end and the right end of the stepped hook rear-mounted double-end claw chuck 9.

In the structure, when the rear clamping force of the stepped hook rear-mounted double-end jaw chuck 9 is greater than the front clamping force and the chuck rear shaft 8 moves to the right, the outer conical surface at the left end of the stepped hook rear-mounted double-end jaw chuck 9 is firstly separated from the inner conical surface of the chuck front shaft 10, the stepped hook rear-mounted double-end jaw chuck 9 abuts against the limiting table 21 along with the step surface of the chuck rear shaft 8 moving to the right end of the stepped hook rear-mounted double-end jaw chuck 9 to stop moving, and the outer conical surface at the right end of the stepped hook rear-mounted double-end jaw chuck 9 is separated from the inner conical surface of the chuck rear shaft 8 when the chuck rear shaft 8 moves to the right; when the rear clamping force of the stepped hook rear-mounted double-end jaw chuck 9 is smaller than the front clamping force, when the chuck rear shaft 8 moves rightwards, the outer conical surface of the right end of the stepped hook rear-mounted double-end jaw chuck 9 is firstly separated from the inner conical surface of the chuck rear shaft 8, and under the matching of the stepped hook 14 and the inner stepped surface 15, the chuck rear shaft 8 pulls the stepped hook rear-mounted double-end jaw chuck 9 to move rightwards, so that the separation of the left end of the stepped hook rear-mounted double-end jaw chuck 9 and the inner conical surface of the chuck front shaft 10 is completed.

According to the technical scheme, the clamping or loosening of the needle 13 by two ends of the stepped hook rear-mounted double-end jaw chuck 9 is realized after the chuck rear shaft 8 and the stepped hook rear-mounted double-end jaw chuck 9 are pushed or pulled to move leftwards or rightwards by the pulling pin 6 through the left-right movement of the sliding sleeve 2, the clamping or loosening of the needle 13 by two ends of the stepped hook rear-mounted double-end jaw chuck 9 is realized, the clamping structure of the needle 13 is simple, the operation is convenient and rapid, the stepped hook rear-mounted double-end jaw chuck 9 with two sections of conical structures is adopted, the right end of the stepped hook rear-mounted double-end jaw chuck 9 is hooked and connected with the inner wall of the chuck rear shaft 8, the phenomenon that the outer conical surface of the left end of the stepped hook rear-mounted double-end jaw chuck 9 is not completely separated from the inner conical surface of the chuck front shaft 10 is effectively solved, the right-moving position of the stepped hook rear-, the needle withdrawing and clamping stroke of the stepped hook rear-mounted double-end clamping jaw 9 is small, the needle 13 is high in clamping efficiency, the clamping structure is compact, on the premise that the required clamping force for clamping the needle 13 by two ends of the stepped hook rear-mounted double-end clamping jaw 9 is met, the spring force of the required clamping spring 4 is reduced, the force for opening the stepped hook rear-mounted double-end clamping jaw 9 is reduced, the stepped hook rear-mounted double-end clamping jaw 9 is small in structure, the internal space of the dental handpiece is saved, the weight reduction of the dental handpiece is facilitated, the clamping structure is novel in design, the clamping force meets the clamping requirement of the needle 13, the needle 13 is clamped and disassembled conveniently and quickly, and the user experience effect is good.

The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.