CN205251720U - High -speed cell -phone core core shaft assembly - Google Patents
High -speed cell -phone core core shaft assembly Download PDFInfo
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- CN205251720U CN205251720U CN201520775175.XU CN201520775175U CN205251720U CN 205251720 U CN205251720 U CN 205251720U CN 201520775175 U CN201520775175 U CN 201520775175U CN 205251720 U CN205251720 U CN 205251720U
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- chuck
- hollow cavity
- installation sleeve
- collet body
- taper surface
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Abstract
The utility model provides a high -speed cell -phone core core shaft assembly, includes the dabber, be equipped with the cavity cavity in the dabber, follow the length direction of cavity is equipped with pressing piece, spring, chuck and uide bushing in proper order, the chuck includes collet bodies, the collet bodies slidable sets up in hollow installation cover, the installation cover is fixed in the cavity cavity, and be located one side of uide bushing, collet bodies's both ends be equipped with with but the internal diameter sliding fit's of installation cover cylindric holding ring, two collet bodies's between the holding ring external diameter is less than the internal diameter of installation cover, be close to uide bushing one side the holding ring edge to the spring lopsidedness extends and forms the cooperation taper surface that is used for car needle clamping. The clamping stability of car needle is high.
Description
Technical field
The utility model relates to medical instruments field, is specifically related to a kind of high speed handpiece movement mandrel component.
Background technology
Dental handpiece is one of equipment of oral medical indispensability, and the field of application is more and more extensive, except the department of stomatology, also has the use of internal medicine, orthopaedics, beauty and shaping industry. The head that the structure of dental handpiece comprises handle, is connected with handle, head comprises with the rotating shaft of needle holder part, is placed on the wind wheel in rotating shaft and is symmetricly set on the bearing of wind wheel both sides, needle holder part, for clamping trolley pin, is with motor-car pin to rotate in the time that rotating shaft is rotated, polishing tooth. Therefore, needle holder part must clamp car pin firmly, can not allow car pin come off, otherwise threatens to patient and doctor. Existing dental handpiece, the opening of its needle holder part is larger, if the opening of needle holder part is larger, exists car pin to hold caducous danger; If the opening of needle holder part is less, car pin be difficult to through, cannot clamping trolley pin.
Summary of the invention
The purpose of this utility model is to provide a kind of high speed handpiece movement mandrel component, and it can clamp car pin firmly, makes car pin difficult drop-off.
For reaching this object, the utility model by the following technical solutions:
A kind of high speed handpiece movement mandrel component, comprises mandrel, in described mandrel, is provided with hollow cavity, is provided with successively pressing piece, spring, chuck and fairlead along the length direction of described hollow cavity; Described chuck comprises collet body, and described collet body is slidably arranged in the installation sleeve of hollow, and described installation sleeve is fixed in described hollow cavity, and is positioned at a side of described fairlead;
The two ends of described collet body are provided with the cylindric locating ring slidably coordinating with the internal diameter of described installation sleeve, and the external diameter of the collet body described in two between locating ring is less than the internal diameter of described installation sleeve; Described locating ring edge near described fairlead one side extends to form the cooperation taper surface for car pin clamping to described spring lopsidedness.
Preferably, the T shape structure that described pressing piece is made up of press section and connecting portion, the radial section that described press section is greater than described hollow cavity at described mandrel footpath sectional area is upwards long-pending; Described connecting portion is along the axis direction setting of described hollow cavity, and one end of described connecting portion is fixedly connected with described chuck, and the other end is fixedly connected with described press section, and described spring housing is contained in described connecting portion.
Preferably, the external diameter of described spring is greater than the internal diameter of described hollow cavity.
Preferably, the front end of described chuck is provided with screwed hole, and the outside of described connecting portion is provided with the external screw thread with described screwed hole secure fit, and external screw thread on described connecting portion is left hand thread, screws direction contrary with the rotation direction of described mandrel.
Preferably, described hollow cavity is the cylinder-like structure of internal diameter homogeneous, and the installation sleeve of hollow and described fairlead interval suit are fixed in described hollow cavity, and one end of described chuck is inserted in described installation sleeve and can be moved upward at the axle of described installation sleeve;
The madial wall of described installation sleeve is provided with installation taper surface, and the bore of described installation taper surface is less the closer to a side of described spring, described cooperation taper surface coordinates with the madial wall adaptability of described installation sleeve, accordingly, the bore of described cooperation taper surface is less the closer to a side of described spring, coordinates with the external diameter adaptability of described chuck.
Preferably, described chuck is the integral structure being made up of successively pressing lever, collet body, spacing ring three parts, and the external diameter of described pressing lever is less than described collet body, and the external diameter of described collet body is less than the external diameter of described spacing ring;
Described collet body is the claw-like structure that sidewall is evenly provided with some U-shaped cell bodies, the opening of described U-shaped cell body is towards a side at described fairlead place, described cooperation taper surface is arranged on the lateral wall of described collet body, and the position of described cooperation taper surface setting is the side near described collet body;
Described spacing ring is assemblied in the hollow cavity between described installation sleeve and described fairlead.
Preferably, described chuck is being provided with interior chamfering near the opening part of described spring one end.
Preferably, the external diameter of described hollow cavity is 3.3～3.7mm.
Preferably, described fairlead is weldingly fixed in described hollow cavity.
The utility model, according to foregoing, when chuck slides in installation sleeve, only contacts with taper surface part by locating ring between the two, when enough support forces are provided, has reduced friction, has reduced loss. Because car pin inserts chuck, when chuck is fixed by coordinating taper surface and installation taper surface to clamp with installation sleeve, owing to coordinating taper surface to be arranged on the inner side of locating ring, the cylindric locating ring at collet body two ends contacts with the madial wall of installation sleeve, the frictional force producing when contact, keeps and has strengthened the clamping stability of car pin.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of chuck in the utility model
Fig. 2 is the explosive view of an embodiment of the present utility model;
Fig. 3 be in the utility model chuck and installation sleeve in the structural representation of clamped condition not;
Fig. 4 is chuck and the structural representation of installation sleeve in clamped condition in the utility model.
Wherein: mandrel 1, hollow cavity 101; Pressing piece 2, press section 21, connecting portion 22;
Spring 3; Chuck 4, pressing lever 41, collet body 42, U-shaped cell body 421, locating ring 422; Spacing ring 43, coordinates taper surface 401; Fairlead 5; Installation sleeve 6, installs taper surface 601; Car pin 7.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, embodiment of the present utility model is described in detail. It will be understood to those of skill in the art that the following drawings and detailed description of the invention are only preferred embodiment of the present utility model, so that understand better the utility model, thereby should not be considered as limiting scope of the present utility model. For a person skilled in the art, the utility model can have various modifications and variations, all within spirit of the present utility model and principle, any amendment of doing, is equal to and replaces or improvement etc., within all should being included in protection domain of the present utility model.
As shown in Figures 1 and 2, a kind of high speed handpiece movement mandrel component, comprises mandrel 1, in described mandrel 1, is provided with hollow cavity 101, is provided with successively pressing piece 2, spring 3, chuck 4 and fairlead 5 along the length direction of described hollow cavity 101; Described chuck 4 comprises collet body 42, and described collet body 42 is slidably arranged in the installation sleeve 6 of hollow, and described installation sleeve 6 is fixed in described hollow cavity 101, and is positioned at a side of described fairlead 5;
The external diameter that the two ends of described collet body 42 are provided with the collet body 42 between locating ring 422 described in the cylindric locating ring 422, two slidably coordinating with the internal diameter of described installation sleeve 6 is less than the internal diameter of described installation sleeve 6; Described locating ring 422 edges near described fairlead 5 one sides extend to form the cooperation taper surface 401 for car pin 7 clampings to described spring 3 lopsidedness.
Chuck 4, in the time of the interior slip of installation sleeve 6, only contacts with taper surface part by locating ring between the two, when enough support forces are provided, has reduced friction, has reduced loss. Because car pin 7 inserts chuck 4, when chuck 4 is fixed by coordinating taper surface 401 and installation taper surface 601 to clamp with installation sleeve 6, owing to coordinating taper surface 401 to be arranged on the inner side of locating ring 422, the cylindric locating ring 422 at collet body 42 two ends contacts with the madial wall of installation sleeve 6, the frictional force producing when contact, keeps and has strengthened the clamping stability of car pin 7.
Preferably, the T shape structure that described pressing piece 2 is made up of press section 21 and connecting portion 22, the radial section that described press section 21 is greater than described hollow cavity 101 at described mandrel footpath sectional area is upwards long-pending; Described connecting portion 22 is along the axis direction setting of described hollow cavity 101, and one end of described connecting portion 22 is fixedly connected with described chuck 4, and the other end is fixedly connected with described press section 21, and described spring 3 is sleeved on described connecting portion 22.
Spring 3 is sleeved on described connecting portion 22, in the rear of chuck 4 opening directions, while pressing by press section 21, the masterpiece of spring 3 is used on connecting portion 22, by connecting portion 22, chuck 4 is produced the effect of power, coordinating taper surface 401 and clampingc car pin 7 under the interaction of taper surface 601 is installed, overcoming when spring 3 is arranged on to the front of chuck 4 opening directions, the masterpiece that spring 3 produces is used in chuck 4 openends and makes chuck 4 hold yielding impact.
Preferably, the external diameter of described spring 3 is greater than the internal diameter of described hollow cavity 101.
Press pressing piece 2 to the inner side of hollow cavity 101, the direction motion that chuck 4 is increased toward the bore that taper surface 601 is installed, spring 3 is built in described hollow cavity, with respect to the set-up mode of external, avoid between spring coil and spring coil, hiding grey problem in long-term use rear spring 3, extended its service life.
Preferably, the front end of described chuck 4 is provided with screwed hole, and the outside of described connecting portion 22 is provided with the external screw thread with described screwed hole secure fit, and external screw thread on described connecting portion 22 is left hand thread, screws direction contrary with the rotation direction of described mandrel 1.
The front end of described chuck 4 arranges screwed hole, and pressing lever 41 and connecting portion 22 are fixed by threaded engagement, process easy for installation; The more important thing is, the external screw thread on described connecting portion 22 is left hand thread, screws direction contrary with the rotation direction of described mandrel 1, and when in the time that special circumstances connecting portion 22, with gland, friction occurs, the connecting portion 22 of pressing piece 2 can not occur loosening or come off.
Preferably, described hollow cavity 101 is the cylinder-like structure of internal diameter homogeneous, the installation sleeve 6 of hollow and described fairlead 5 interval suits are fixed in described hollow cavity 101, and one end of described chuck 4 is inserted in described installation sleeve 6 and can be moved upward at the axle of described installation sleeve 6;
The madial wall of described installation sleeve 6 is provided with installs taper surface 601, and the bore of described installation taper surface 601 is less the closer to a side of described spring 3, described cooperation taper surface 401 coordinates with the madial wall adaptability of described installation sleeve 6, accordingly, the bore of described cooperation taper surface 401 is less the closer to a side of described spring 3, coordinates with the external diameter adaptability of described chuck 4.
As shown in Figure 2, pressing piece 2, spring 3, chuck 4 and wire sleeve 5 are the hollow structure that can hold car pin 7, and one end of one end of pressing piece 2 and chuck 4 is fixed, and spring 3 is arranged between described pressing piece 2 and chuck 4.
When clamping car pin 7, press pressing piece 2, described spring 3 is pushed on the end face of installation sleeve 5, promote the lateral movement of chuck 4 to fairlead 5 simultaneously, the small end that coordinates taper surface 401 is to the large end motion of taper surface 601 being installed on installation sleeve 6, as shown in Figure 3, described chuck 4 is in relaxed state, car pin 7 is passed to the described chuck 4 of the rear insertion of described fairlead 5, when moving to extreme position, one end of car pin 7 unclamps pressing piece 2, the spring 3 being extruded starts to recover deformation, elastic potential energy changes into kinetic energy, promoting described pressing piece 2 moves laterally, described pressing piece 2 drives described chuck 4 to move laterally simultaneously, direction along its small end is moved, chuck 4 is slowly clamp-oned the small end of described hollow cavity 101, the radially polymerization of the sidewall of chuck 4, car pin 7 in chuck 4 is clamped gradually, until the stroke of spring 3 discharges completely, described chuck 4 and 2 stop motions of described pressing piece, for final clamp position, as shown in Figure 4.
Need to take off car pin 7 time, according to above-mentioned steps,, car pin 7 is extracted during in relaxed state at chuck 4.
For fixing of car pin 7, it is indispensable taper surface 601 being installed and being coordinated taper surface 401, and it is the cone structure in cavity that taper surface 601 is installed, and has certain difficulty of processing; And according to the structural design of the technical program, add man-hour, at the cylinder-like structure of the interior processing internal diameter of mandrel 1 homogeneous as hollow cavity 101, in the interior processing of the less installation sleeve 6 of length, taper surface 601 is installed, again installation sleeve 6 is fixed in hollow cavity 101, has avoided in prior art, directly process the inside at the mandrel 1 of length increasing by taper surface 601 is installed, reduce difficulty of processing, improved assembly precision and stability.
Preferably, as shown in Figure 1, the integral structure of described chuck 4 for being formed successively by pressing lever 41, collet body 42, spacing ring 43 3 parts, the external diameter of described pressing lever 41 is less than described collet body 42, and the external diameter of described collet body 42 is less than the external diameter of described spacing ring 43;
Described collet body 42 is the claw-like structure that sidewall is evenly provided with some U-shaped cell bodies 421, the opening of described U-shaped cell body 421 is towards a side at described fairlead 5 places, described cooperation taper surface 401 is arranged on the lateral wall of described collet body 42, and the position that described cooperation taper surface 401 arranges is the side near described collet body 42;
Described spacing ring 43 is assemblied in the hollow cavity 101 between described installation sleeve 6 and described fairlead 5.
Directly, by pressing lever 41 pocketed springs 3 of chuck 4, pressing piece 2 is fixed on chuck 4, and spring 3 props up the end face of fairlead 5, the compact conformation of whole mandrel component, the good stability of entirety; Described collet body 42 is the claw-like structure that sidewall is evenly provided with some U-shaped cell bodies 421, makes collet body 42 have certain elasticity, is convenient to insertion and the clamping of car pin 7; Described spacing ring 43 is assemblied in the hollow cavity 101 between described installation sleeve 6 and described fairlead 5, when the end contact of the rear end face of spacing ring 43 and fairlead 5, the distance between installation sleeve 6 and fairlead 5 defines the range of movement of spacing ring 43, can require to adjust this range of movement to meet clamping stability, strong adaptability according to the concrete clamping of the specific performance of spring 3 and car pin 7.
Preferably, described chuck 4 is being provided with interior chamfering near the opening part of described spring 3 one end.
When car pin 7 inserts described chuck 4, by interior chamfering transition, easy accessibility, the more important thing is and avoid the end face of described chuck 4 and corner that madial wall crosses to scratch or the lateral wall of wearing and tearing car pin 7, thereby keeps the stability of car pin 7 clampings.
Preferably, the external diameter of described hollow cavity 101 is 3.3～3.7mm.
The nominal outer diameter of hollow cavity 101 of the prior art is 3.175mm, the car pin of the adaptation specification of 101 clampings of hollow cavity of specification like this, because the size of car pin is too little, it is inadequate to its chucking power that this sample car pin clamps accessory in the time of clamping, cannot meet the requirement more running up, so in the present embodiment, the size of car pin is amplified and is set between 3.3～3.7mm, power is stronger, and chucking power is larger, more stable when rotation.
Preferably, described fairlead 5 is weldingly fixed in described hollow cavity 101.
Mode by welding makes described fairlead 5 be fixed on described hollow cavity 10, has strengthened the stability of its position, thereby has also ensured the stable and precision of car pin 7 clampings.
Know-why of the present utility model has below been described in conjunction with specific embodiments. These are described is in order to explain principle of the present utility model, and can not be interpreted as by any way the restriction to the utility model protection domain. Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present utility model, within these modes all will fall into protection domain of the present utility model.
Claims (9)
1. a high speed handpiece movement mandrel component, comprise mandrel, in described mandrel, be provided with hollow cavity, length direction along described hollow cavity is provided with pressing piece, spring, chuck and fairlead successively, it is characterized in that: described chuck comprises collet body, described collet body is slidably arranged in the installation sleeve of hollow, and described installation sleeve is fixed in described hollow cavity, and is positioned at a side of described fairlead;
The two ends of described collet body are provided with the cylindric locating ring slidably coordinating with the internal diameter of described installation sleeve, and the external diameter of the collet body described in two between locating ring is less than the internal diameter of described installation sleeve; Described locating ring edge near described fairlead one side extends to form the cooperation taper surface for car pin clamping to described spring lopsidedness.
2. a kind of high speed handpiece movement mandrel component according to claim 1, it is characterized in that: the T shape structure that described pressing piece is made up of press section and connecting portion, the radial section that described press section is greater than described hollow cavity at described mandrel footpath sectional area is upwards long-pending; Described connecting portion is along the axis direction setting of described hollow cavity, and one end of described connecting portion is fixedly connected with described chuck, and the other end is fixedly connected with described press section, and described spring housing is contained in described connecting portion.
3. a kind of high speed handpiece movement mandrel component according to claim 2, is characterized in that: the external diameter of described spring is greater than the internal diameter of described hollow cavity.
4. a kind of high speed handpiece movement mandrel component according to claim 2, it is characterized in that: the front end of described chuck is provided with screwed hole, the outside of described connecting portion is provided with the external screw thread with described screwed hole secure fit, and the external screw thread on described connecting portion is left hand thread, screw direction contrary with the rotation direction of described mandrel.
5. a kind of high speed handpiece movement mandrel component according to claim 1, it is characterized in that: described hollow cavity is the cylinder-like structure of internal diameter homogeneous, the installation sleeve of hollow and described fairlead interval suit are fixed in described hollow cavity, and one end of described chuck is inserted in described installation sleeve and can be moved upward at the axle of described installation sleeve;
The madial wall of described installation sleeve is provided with installation taper surface, and the bore of described installation taper surface is less the closer to a side of described spring, described cooperation taper surface coordinates with the madial wall adaptability of described installation sleeve, accordingly, the bore of described cooperation taper surface is less the closer to a side of described spring, coordinates with the external diameter adaptability of described chuck.
6. a kind of high speed handpiece movement mandrel component according to claim 5, it is characterized in that: described chuck is the integral structure being made up of successively pressing lever, collet body, spacing ring three parts, the external diameter of described pressing lever is less than described collet body, and the external diameter of described collet body is less than the external diameter of described spacing ring;
Described collet body is the claw-like structure that sidewall is evenly provided with some U-shaped cell bodies, the opening of described U-shaped cell body is towards a side at described fairlead place, described cooperation taper surface is arranged on the lateral wall of described collet body, and the position of described cooperation taper surface setting is the side near described collet body;
Described spacing ring is assemblied in the hollow cavity between described installation sleeve and described fairlead.
7. a kind of high speed handpiece movement mandrel component according to claim 1 or 5, is characterized in that: described chuck is being provided with interior chamfering near the opening part of described spring one end.
8. a kind of high speed handpiece movement mandrel component according to claim 1, is characterized in that: the external diameter of described hollow cavity is 3.3～3.7mm.
9. a kind of high speed handpiece movement mandrel component according to claim 1, is characterized in that: described fairlead is weldingly fixed in described hollow cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775175.XU CN205251720U (en) | 2015-09-30 | 2015-09-30 | High -speed cell -phone core core shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775175.XU CN205251720U (en) | 2015-09-30 | 2015-09-30 | High -speed cell -phone core core shaft assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205251720U true CN205251720U (en) | 2016-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520775175.XU Active CN205251720U (en) | 2015-09-30 | 2015-09-30 | High -speed cell -phone core core shaft assembly |
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| Country | Link |
|---|---|
| CN (1) | CN205251720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114259311A (en) * | 2022-01-26 | 2022-04-01 | 深圳市雅维医疗器械有限公司 | Root canal prepares system |
-
2015
- 2015-09-30 CN CN201520775175.XU patent/CN205251720U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114259311A (en) * | 2022-01-26 | 2022-04-01 | 深圳市雅维医疗器械有限公司 | Root canal prepares system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |