WO2015157931A1

WO2015157931A1 - Drill chuck

Info

Publication number: WO2015157931A1
Application number: PCT/CN2014/075465
Authority: WO
Inventors: 柳尧亭
Original assignee: 威海达旺五金制品有限责任公司; 柳尧亭
Priority date: 2014-04-16
Filing date: 2014-04-16
Publication date: 2015-10-22

Abstract

A drill chuck provided with a front piece (2), clamping jaws (1) and a rear sleeve (17); the front piece (2) is provided with clamping jaw holes (20); the clamping jaws (1) are located in the clamping jaw holes (20); the drill chuck is also provided with an opening device (8); the opening device (8) is provided with an opening hole (24); when the opening hole (24) rotates in the circumferential direction of the front piece (2), the clamping jaws are opened, the opening hole (24) being 1-35 mm deep. The drill chuck is used in the field of machining, solving the technical problems that a dedicated tool has to be used to open an existing drill chuck, and if the dedicated tool is lost, the drill chuck cannot be opened, and also, the drill chuck requiring a reverse operation cannot perform the reverse operation.

Description

Drill chuck

Technical field

The present invention relates to a jig for a machining tool, and more particularly to a drill chuck.

Background technique

Drilling and milling are often used in production and processing activities, such as machine tools and electric drills. Drill chucks for holding drills, milling cutters, etc. on the working axes of these equipments have experienced long-term application and improvement. However, there are still many shortcomings. There are three main types of drill chucks on the market today: wrench drill chucks, hand drill chucks and self-tightening chucks.

technical problem

These drill chucks have the following major problems:

(1) It is difficult to open.

The wrench drill chuck is used to increase the clamping force of the drill chuck by special auxiliary tools. When the drill bit is changed, the drill chuck is also released by special auxiliary tools, which can be used on some large, medium and small processing equipment. use. The advantage of this type of wrench drill chuck is that it has a wide range of application. The disadvantage is that special auxiliary tools must be used. Once lost or damaged, the drill chuck can not be opened, which becomes a waste product, resulting in waste of resources; The head and the self-tightening chuck often also fail to open due to various reasons during use, which brings great difficulties to the normal use of the drill chuck.

(2) Can not work in reverse.

At present, many drill chucks on the market can only be used in one direction. Once the drill chuck is rotated in the reverse direction, the jaws will loosen the cutter and the drill chuck will stop working immediately, which brings great inconvenience to practical applications. .

Technical solution

The invention is directed to the technical problem that the existing drill chuck is difficult to open and can not work in reverse, and provides a drill chuck which can be easily opened and can be operated in reverse.

To this end, the present invention is provided with a front body, a clamping jaw and a rear sleeve, the front body is provided with a clamping claw hole, and the clamping jaw is located in the clamping claw hole; the drilling chuck is further provided with an opening device, and the opening device is provided with an opening hole and opening the hole When rotating in the circumferential direction of the precursor, the jaws are opened, and the opening depth is 1 to 35 mm.

Preferably, an opening hole is provided on the precursor.

Preferably, the drill chuck is further provided with a thread, and the opening hole is provided on the nut. When the opening hole is rotated in the circumferential direction of the nut, the nut rotates together with the opening hole.

Preferably, the opening device is further provided with a front collar, the opening hole is provided on the front collar; the front collar is sleeved on the front body and forms a fixed connection with the front body in their circumferential direction.

Preferably, the opening device is further provided with a front collar, the opening hole is provided on the front collar; the front collar is sleeved on the silk core and forms a fixed connection with the silk core in their circumferential direction.

Preferably, the front collar is provided with a front collar hole, and the front collar hole is provided with an opening column, and the opening hole is disposed on the opening column; the opening column is interference-fitted with the front collar.

Preferably, the opening hole is provided with at least one of a combination of one of a flat shape, a cross shape, a square shape, a circular shape, an elliptical shape, a diamond shape, and a polygonal shape.

Preferably, the opening hole is provided with two symmetrical slits having a width of 0.5 to 3 mm.

Preferably, the two symmetrical slits are provided with two or more sets; the drill chuck is further provided with an anti-reverse system, and the anti-reverse system is provided with a pawl, a ratchet and a switch, and the pawl is sleeved on the precursor and is adjacent to the precursor Interference fit; the ratchet and the switch are sleeved on the pawl, the pawl is provided with a pawl protrusion, the switch is provided with a switch protrusion; the ratchet wheel is also provided with a ratchet key, and the back sleeve is provided with a rear set keyway, a ratchet key Cooperate with the rear sleeve keyway.

Beneficial effect

The drill chuck opening device provided by the invention is small in size and low in cost; other tools are often used in the case of using the drill chuck, and once the drill chuck cannot be opened, any suitable tool for finding the surrounding is inserted into the tool. Rotating in the opening hole makes the drill chuck easy to open, and the operation is simple and convenient. It is also possible to turn the rear sleeve to open the drill chuck, which saves time and labor, and does not need to be compared with the drill chuck which needs special tools to open now. The use of special opening tools further saves costs; thanks to the use of ratchet pawls, the drill chuck can not only work in the forward direction, but also work in the reverse direction, greatly increasing the practicality of the drill chuck.

DRAWINGS

Figure 1 is a cross-sectional view of a front view of the present invention;

Figure 2 is an exploded view of the present invention;

Figure 3 is a perspective view of a precursor of the present invention;

Figure 4 is a perspective view of the rear body of the present invention;

Figure 5 is a schematic structural view of the opening device of the present invention;

Figure 6 is a schematic structural view of a front collar of the present invention;

Figure 7 is a schematic view showing the structure of the open column of the present invention;

Figure 8 is a perspective view of the back cover of the present invention;

Figure 9 is a perspective view of the pawl of the present invention;

Figure 10 is a perspective view of the ratchet of the present invention;

Figure 11 is a perspective view of the switch of the present invention;

Figure 12 is a schematic view showing the structure of the anti-reverse system of the present invention.

The symbols in the figure indicate:

1. jaw; 2. precursor; 3. front collar; 4. open column; 5. switch; 6. pawl; 7. ratchet; 8. open device; 9. anti-reverse system; 11. Ring gear; 12. Bolt; 13. Planetary carrier; 14. Sun gear; 15. Rear body; 16. Planetary wheel; 17. Rear sleeve; 18. Planetary gear transmission system; 19. Front body groove; Clamping hole; 21. jaw internal thread; 22. rear external thread; 23. front collar hole; 24. opening hole; 25. rear sleeve key; 26. sun wheel keyway; 27. planetary wheel hole; Planet wheel carrier key; 29. rear body keyway; 30. spring groove; 31. circlip; 32. pawl protrusion; 33. helical tooth; 34. ratchet key; 35. rear sleeve keyway; ; 37. Tool hole; 38. Main unit connection hole; 39. Planetary wheel shaft hole.

BEST MODE FOR CARRYING OUT THE INVENTION

Specific embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIGS. 1 through 4, the present invention mainly includes a jaw 1, a front body 2, a rear body 15, a rear sleeve 17, an opening device 8, an anti-reverse system 9, and a planetary gear transmission system 18.

One end of the front body 2 is internally provided with a front body groove 19 around its central axis, and the left end portion of the rear body 15 is located in the front body groove 19. The front body 2 is machined obliquely symmetrically with three jaw holes 20 extending through the upper and lower sides, and the jaws 1 are located in the jaw holes 20. The jaw 1 is provided with a jaw internal thread 21, and one end of the rear body 15 is provided with a posterior external thread 22. The jaw internal thread 21 and the rear external thread 22 cooperate with each other, and when the rear body 15 rotates, the jaw 1 which is threadedly engaged therewith moves upward or downward in the jaw hole 20.

The rear body 15 is sleeved with a pressure plate 10, and the pressure plate 10 is fixedly connected to the front body 2 by bolts 12 through bolt holes on the upper body. The right end of the rear body 15 is further provided with a retaining groove 30, and the retaining spring 31 is opened and put into the retaining groove 30, so that a fit is formed between the retaining spring 31, the rear body 15 and the rear sleeve 17, thereby making the rear The sleeve 17 does not fall off the edge of the rear body 15.

The planetary gear transmission system 18 mainly includes a sun gear 14, a planetary gear 16, a ring gear 11, and a planetary carrier 13. The planetary carrier 13 has a disk shape, three planetary wheel holes 27 are uniformly disposed along the circumference of the planetary carrier 13, and planetary axle holes 39 are provided on both sides of the planetary carrier 13 corresponding to the planetary gear holes 27, and the planets The wheel 16 is fixed in the planet wheel bore 27 on the planet carrier 13 by a planetary axle, which is situated between the three planet wheels 16. The ring gear 11 is located on the outer circumference of the planetary carrier 13, and its internal teeth mesh with the external teeth of the planetary gear 16. Three planetary wheel holes 27 are provided, and are evenly distributed along the circumference of the planetary carrier 13.

The planetary carrier 13 is further provided with a planet carrier key 28, and the rear body 15 is provided with a rear body keyway 29, and the planetary carrier key 28 cooperates with the rear body keyway 29, so that the planetary carrier 13 and the rear body 15 are along the edge They form a fixed connection in the circumferential direction. When the planet carrier 13 rotates, the rear body 15 rotates therewith.

The invention is further provided with an opening device 8, as shown in Figures 5, 6 and 7, the opening device 8 is provided with a front collar 3 and an opening column 4, the front collar 3 being sleeved on the front body 2 and being A fixed connection is formed along their circumferential direction, preferably an interference fit. The front collar 3 is provided with six front collar holes 23 along its circumference (the number of which can be arbitrarily determined according to the size of the front collar and actual needs), and the opening column 4 is disposed in the front collar hole 23, and before The collar 3 has an interference fit. The opening column 4 is provided with an opening hole 24, and the opening hole 24 can be selected from the shape of any common tool in life, such as a shape, a cross, a square, a circle, an ellipse, a diamond, a polygon, etc., so that once the drill chuck appears, In the open condition, any suitable tool can be inserted into the opening hole 24 for rotation, and the drill chuck can be easily opened.

The opening arrangement 8 used in the present invention is a first one, which is provided with a front collar 3 and an opening column 4, the practical meaning of which is to facilitate processing, and the opening device of the invention can be realized by a more direct technical solution as follows. Solution 2: There are various holes of different sizes and shapes directly on the drill chuck precursor 2; scheme 3: a front collar 3 is provided on the precursor 2, and various processing is directly performed on the front collar 3 The size and shape of the hole makes the entire drill chuck look smaller and more flexible. The opening device of the three solutions of the present invention can be provided with various sizes and shapes. When the hole is a slot, the size can be set to 1.0-3.0 size of the existing slotted screwdriver. When the hole is a cross, it can be set to the size of 1.0-3.0 for the existing Phillips screwdriver; when the hole is a hexagonal hole, we can set the H1.5 and H2.0 for the existing hexagonal hand. Sizes of various models such as H2.5, H3.0, and H4; for circular holes, the surface is wider, and holes of various diameters that can be used on the precursor 2 can be used. In short, for these different shapes and sizes of holes, when we open them, we are not limited to special tools. In actual production work, it is easy to use the various tools around us, insert them into suitable holes, and insert the drill clips. The head is opened to make it easier to open the drill chuck.

The opening hole 24 may or may not be a through hole, and it may not be too shallow, because the upper force which can be used when the conventional tool of the side is inserted therein is ensured, and the depth is preferably 1 to 35 mm. The opening hole 24 may have a circular shape or other shape, and is provided with two symmetrical slits. The slit width is preferably 0.5 to 3 mm, and the two slits correspond to each other, so that a flat-shaped screwdriver can be placed therein and rotated, and the drill string is inserted. The head is open; of course, it is also possible to set two groups that are perpendicular to each other, and a Phillips screwdriver can be placed therein.

The present invention is further provided with a rear sleeve 17, as shown in Fig. 8, the right end of the rear sleeve 17 is curved inwardly in the direction of the central axis thereof, and three rear sleeve keys 25 are provided. The inner circumference of the sun gear 14 is provided with three sun gear keyways 26, The sleeve key 25 cooperates with the sun gear keyway 26 such that the rear sleeve 17 and the sun gear 14 form a fixed connection in their circumferential direction. When the rear sleeve 17 is rotated, the sun gear 14 also rotates with it. The other end of the rear sleeve 17 is provided with a rear sleeve keyway 35.

The present invention is further provided with an anti-reverse system 9, as shown in Figs. 9 to 12, the anti-reverse system 9 is provided with a switch 5, a pawl 6 and a ratchet 7. The pawl 6 is interference-fitted with the front body 2, and the outer circumference of the ratchet 7 is provided with a ratchet key 34, and the ratchet key 34 and the rear sleeve keyway 35 cooperate with each other. The pawl 6 is provided with a pawl projection 32, and the inner ring of the ratchet 7 is provided with a ring of helical teeth 33, and the ratchet 7 is sleeved on the pawl 6 where the pawl projection 32 is provided. Thus, when the pawl projection 32 is in the raised state, the pawl 6 and the ratchet 7 are relatively movable in one direction along their circumferential direction and locked in the other direction. The inner ring of the switch 5 is provided with a switch protrusion 36, and the switch 5 is also sleeved on the pawl 6. When the unlocking is required, the switch 5 is rotated, so that the switch protrusion 36 presses the pawl protrusion 32, so that the ratchet 7 and There is no restriction between the pawls 6 to unlock.

Further, a cutter hole 37 is provided inside the left end of the front body 2 in the direction of the central axis. The inner end of the right end of the rear body 15 is further provided with a main body connecting hole 38 in the direction of the central axis. The main connecting hole 38 is provided with a thread (not shown), which cooperates with the thread on the working shaft of the main body, and rotates when the main working shaft rotates. , will drive the rear body 15 to rotate together.

The following describes the working process of the present invention:

Insert the cutter into the cutter hole 37 of the front body 2, hold the front collar 3 by hand, open the switch 5, and then rotate the rear sleeve 17, because the rear sleeve key 25 and the sun gear keyway 26 cooperate with each other, the sun gear 14 will follow The rotation of the sleeve 17 is rotated to further drive the rotation of the three planet wheels 16. The three planetary gears 16 move around the inner circumference of the ring gear 11 to drive the rotation of the planetary carrier 13. Further, since the carrier 13 is engaged with the rear body 15 via the carrier key 28, the rear body 15 also rotates therewith. Since the rear body 15 and the jaws 1 are screwed together, the jaws 1 move downward in the jaw holes 20, and the gap between the lower ends of the three jaws 1 also shrinks until they are clamped into the cutter holes 37. Tool.

Ordinary self-tightening chucks need to be opened with special tools once they are unable to open due to the stuck, which is complicated and time-consuming. When the drill chuck of the present invention is stuck, there are two ways to open it:

(1) Holding the front collar 3 by hand, rotating the switch 5 in the opposite direction until the switch 5 presses the pawl 6 off the ratchet 7 to open the anti-reverse system 9; and the switch 5 is provided with a switch projection 36, The rear sleeve 17 is rotated to move the jaw 1 upward along the jaw hole 20, thereby smoothly opening the drill chuck (the reverse of the step of clamping described above).

(2) It is easy to open the drill chuck by finding any suitable tool inserted into the opening hole 24 for rotation.

The method (1) can only be used for the above-mentioned drill chuck using the planetary gear mechanism, and the method (2) can be used for the drill chuck in which the opening device 8 is arbitrarily provided. The opening device 8 provided by the present invention is suitable for use with all drill chucks. For the chuck for machine tools, the spindle brake of the machine tool can be operated with one hand, and the drill chuck can be opened with the other hand. For the gripper for power tools, the chuck is directly held by hand, and the opening device 8 can be used arbitrarily. The tool opens.

When the locking is required to prevent the reverse drilling chuck from being loosened, the switch 5 is rotated and closed, so that the pawl protrusion 32 is in a convex state, and the ratchet 7 and the pawl 6 are in a locked state, and the precursor 2 and the rear body are 15 locks into a whole, allowing the drill chuck to continue working in reverse.

The opening device 8 of the present invention is disposed on the front body 2. For other types of drill chucks such as hand tight, the opening hole 24 can be disposed on the silk nut of the hand drill chuck, and can also be provided on the silk mother. A series of opening devices 8 such as the front collar 3 and the opening post 4 can open the drill chuck when the opening hole 24 drives the coil to rotate in the circumferential direction thereof. For the existing types of drill chucks, after manually clamping the tool, it is also possible to insert a common tool around the opening into the opening hole 24 to further increase the clamping force.

However, the above description is only for the specific embodiments of the present invention, and the scope of the present invention is not limited thereto, and the replacement of the equivalent components or the equivalent changes and modifications according to the scope of the patent protection of the present invention should be It is still within the scope of the claims of the present invention.

Claims

A drill chuck is provided with a front body, a clamping jaw and a rear sleeve, the front body is provided with a clamping claw hole, the clamping jaw is located in the clamping jaw hole; and the drilling chuck is further provided There is an opening device provided with an opening hole which opens when the opening hole is rotated in the circumferential direction of the front body, the opening hole having a depth of 1 to 35 mm.
The drill chuck of claim 1 wherein said opening is provided in said precursor.
A drill chuck according to claim 1, wherein said drill chuck is further provided with a thread, said opening hole being provided on said core, said opening hole being in a circumferential direction of said core When rotated, the silk mother rotates together with the opening hole.
The drill chuck according to claim 2, wherein said opening device is further provided with a front collar, said opening hole being provided on said front collar; said front collar being sleeved on said precursor And forming a fixed connection with the precursors in their circumferential direction.
The drill chuck according to claim 4, wherein the front collar is provided with a front collar hole, and the front collar hole is provided with an opening column, and the opening hole is disposed on the opening column The opening post is in an interference fit with the front collar.
A drill chuck according to claim 3, wherein said opening means is further provided with a front collar, said opening hole being provided on said front collar; said front collar being sleeved on said silk core And forming a fixed connection with the filaments in their circumferential direction.
The drill chuck according to claim 6, wherein the front collar is provided with a front collar hole, and the front collar hole is provided with an opening column, and the opening hole is disposed on the opening column. The opening post is in an interference fit with the front collar.
The drill chuck according to claim 5 or 7, wherein the opening hole is provided with at least one of one or more of a shape of a cross, a cross, a square, a circle, an ellipse, a diamond, and a polygon. The combination.
A drill chuck according to claim 8, wherein said opening hole is provided with two symmetrical slits having a slit width of 0.5 to 3 mm.
A drill chuck according to claim 9, wherein said two symmetrical slits are provided in two or more;

The drill chuck is further provided with an anti-reverse system, the anti-reverse system is provided with a pawl, a ratchet and a switch, and the pawl is sleeved on the front body and has an interference fit with the front body; The ratchet and the switch are sleeved on the pawl, the pawl is provided with a pawl protrusion, and the switch is provided with a switch protrusion;

The ratchet wheel is further provided with a ratchet key, and the rear sleeve is provided with a rear sleeve keyway, and the ratchet key and the rear sleeve keyway cooperate with each other.