CN1640594A - Rotary quick release chuck structure - Google Patents

Abstract

The invention discloses a rotary quick-release chuck structure, which mainly comprises: the lower section part of the body is a drill bit through hole for a positioning part of a drill bit to penetrate in a combined diameter way; the drill bit axial and rotary positioning structure is characterized in that the wall surface of the body is provided with at least one long hole, and a roller pin is filled in the hole; the surface of the positioning part of the drill bit is provided with at least one concave needle roller groove for clamping partial periphery of the needle roller in the needle roller groove; a rotating direction quick-release assembly, which is mainly a rotating inner sleeve engaging radial pivot sleeve on the body corresponding to the position of the needle roller, the inner wall of the rotating inner sleeve is chamfered along a circle to form at least one pushing inclined plane and a needle roller containing part, so as to push the needle roller into the long hole of the drill bit positioning part or allow the needle roller to fall into the needle roller containing part to release the locking relation with the drill bit positioning part.

Description

Rotary quick release chuck structure

technical field

The present invention relates to a chuck, more specifically, it can be used by an operator to control the outer structure of the chuck to reciprocate at a predetermined angle, so as to achieve the purpose of assembling, positioning and removing the drill bit.

Background technique

The chuck structure of the known clamping drill bit is all connected to the power shaft of the transmission device with a body. Several inclined guide holes are arranged in the body, and a jaw is arranged in each inclined guide hole, and a clamping jaw is arranged outside the body. The drive ring controls the jaws to move forward and backward in the body to clamp or release a tool, and when the transmission device is activated, the power shaft drives the body, the jaws, the drive ring and the tool to rotate synchronously.

In the chuck structure mentioned above, the oblique guide hole in the main body is related to the moving direction of the jaws and the force of clamping the tool, so its accuracy is high and the production cost is relatively high; while the jaws are clamped on the body of the tool , if the working resistance increases, the jaws and the tool may slip, so many designs to improve the torque of the jaw-type chuck have emerged, but many designs make the structure of the chuck more and more complicated. Manufacturing costs are also getting higher.

Contents of the invention

The present invention eliminates the problems of the structure of the three-jaw chuck in the prior art, such as high manufacturing cost, slippage between the jaws and the tool when the working resistance increases, and reduced torque. The present invention attempts to overcome the above problems with a structural mode completely different from the traditional three-jaw chuck, and achieves the purposes of simplifying the chuck structure, facilitating and quickly assembling and positioning the drill bit, and improving the torque of the drill bit.

In order to achieve the above purpose, the present invention adopts the following design scheme: a rotary quick-release chuck structure, mainly including:

A main body, the center of which is penetrated by a shaft hole, the upper part is a power shaft hole, and the lower part is a drilling hole for the positioning part of a drill to pass through;

A drill bit axial and rotational positioning structure, at least one long hole is set on the wall of the body relative to the drill hole, and a needle roller is filled in the long hole; at least one concave needle roller is set on the surface of the positioning part of the drill bit groove, so that when the needle roller radially moves inward to the limit position, part of its peripheral edge is clamped in the needle roller groove;

A rotating quick-release group, mainly a rotating inner sleeve; the rotating inner sleeve is pivotally sleeved on the lower section of the body relative to the position of the needle roller; the inner wall of the rotating inner sleeve is radially outwardly inclined cutting to form at least one pushing inclined surface and an enlarged needle roller accommodating part; the rotating quick release group further includes a rotating outer sleeve, and the rotating outer sleeve tightly fits the pivot sleeve on the outside of the rotating inner sleeve;

A rotation angle control structure, including a bouncing ball radially arranged on the wall of the rotating inner sleeve and capable of elastic reciprocating movement, and a groove provided on the surface of the body for the sliding of the bouncing ball to control the rotation The rotation angle of the rotating outer sleeve and the rotating inner sleeve.

A rotation angle limiting structure is a slot and a protrusion arranged at opposite ends of the inner sleeve of the rotation and the body, and the width of the slot is larger than the width of the protrusion. The bouncing ball is controlled to move only in the channel.

Progressive effect of the present invention:

The present invention proposes an unprecedented design of a new collet, which breaks through the previous technology of clamping and positioning the drill bit with three claws, eliminates the problems raised in the previous technology, and simplifies the structure of the entire collet, and the assembly and positioning of the drill bit can be reciprocated and rotated. It can be completed at a predetermined angle, which is convenient and fast, and the positioning of the drill bit is accurate.

In the process of dismounting or assembling the drill bit, the rotation angle control structure and the rotation angle limit structure are used to limit the angle at which the user can rotate the rotation cover. In addition to ensuring the correct positioning of objects, it can also prevent excessive The swivel action causes damage to the object.

Description of drawings

Figure 1: An exploded perspective view of the first embodiment of the present invention.

Fig. 2: Combined appearance diagram of the first embodiment of the present invention.

Fig. 3A: A combined longitudinal sectional view (1) of the first embodiment of the present invention.

Fig. 3B: A combined longitudinal sectional view (2) of the first embodiment of the present invention.

Fig. 4: A combined longitudinal sectional view (3) of the first embodiment of the present invention.

FIG. 5A : sectional view of 5A-5A of FIG. 4 .

FIG. 5B : a cross-sectional view of the moving state drawn according to FIG. 5A .

FIG. 6A : sectional view of 6A-6A of FIG. 4 .

FIG. 6B : a cross-sectional view of the moving state drawn according to FIG. 6A .

Fig. 7: Another embodiment diagram of the positioning part of the drill bit and the drilling of the drill bit according to the present invention.

Fig. 8: A diagram of another embodiment of the drill bit positioning part and the drill bit piercing hole of the present invention.

Fig. 9: An assembled longitudinal sectional view of the second embodiment of the present invention.

Detailed ways

The present invention is a rotary quick-release chuck structure, which mainly includes:

A body 10, as shown in Figure 1 and Figure 3A, has a shaft hole in its center, and a flange 11 is formed on the inner wall of the hole to divide the shaft hole into upper and lower sections. The upper section is the power shaft hole 12, and the hole The wall is provided with threads to be connected with the power shaft (not shown) of the transmission device, and the lower part is a drill bit piercing hole 13, which can be used for the positioning part 81 of a drill bit 80 to pass through; the end of the body 10 is provided with an enlarged diameter Block body 15, this drill bit pierces system hole 13 bottom end hole wall rings and is provided with a stop ring 17, and outside the stop body 15 is closely fitted with an end cover 18, prevents this stop ring 17 from breaking away from, and this stop ring 17 then prevents drill bit 80 Drilling cuttings or dust infiltrate into the body 10 during work;

A drill bit axial and rotational positioning structure, as shown in Figure 1 and Figure 3A, at least one long hole 14 is established on the wall of the body 10 relative to the drill hole 13, and a needle roller 20 is filled in the long hole 14, and the long hole 14 is filled with a needle roller 20. The hole 14 has a radially enlarged change from the inside to the outside. The needle roller 20 is filled in from the outer end of the hole, and the needle roller 20 is moderately stopped when it protrudes from the drill bit and penetrates the hole 13 from the inner end of the hole. Prevent the needle roller from falling from the inner end of the hole; the surface of the positioning part 81 of the drill bit 80 is provided with at least one concave needle roller groove 82, and the positioning part 81 penetrates into the hole 13 of the drill bit, and the part of the needle roller 20 The edge can be snapped into the needle roller groove 82, so that the drill bit 80 can be positioned axially and rotationally; 20 is snapped into the needle roller groove 82, and the gap sealing ring 21 is used to fill the error gap therebetween, so as to avoid the slight shaking of the needle roller 20.

A rotary quick release group, as shown in Figure 2, Figure 3A, Figure 3B, Figure 5A, Figure 5B, includes a rotating inner sleeve 30 and a rotating outer sleeve 40; the rotating inner sleeve 30 is pivotally sleeved on the body The lower part of 10, the bottom end is blocked by the stop body 15 of the body 10; the inner wall of the rotating inner sleeve 30 forms at least one pushing inclined surface 32 along the circular tangent line and a needle accommodating part 33; the rotating The outer cover 40 is pivotally placed on a sleeve body that can be held by the user outside the rotating inner cover 30. At least one concavo-convex structure 35, 45 that can be fitted with each other is provided on the opposite joint surface, so that the user can control the rotating outer sleeve 40 to link the rotating inner sleeve 30; when the rotating outer sleeve 40 and inner sleeve 30 rotate predetermined Angle, so that the needle roller accommodating part 33 relative to the needle roller 20, can provide the retreat space of the needle roller 20, or push the needle roller 20 with its pushing slope 32, so that it protrudes radially and is locked in the In the needle roller groove 82 of the drill bit 80 .

A rotation angle control structure, as shown in Fig. 2, Fig. 4, Fig. 5A, and Fig. 5B, includes a bouncing bead 51 radially arranged on the swivel inner sleeve 30 and capable of elastic reciprocating movement, and a bouncing bead 51 arranged on the surface of the body 10 A channel 52 for the sliding ball 51 to slide, each of the two ends of the channel 52 is a slightly deeper bead groove 53, 54; The distance from the groove 53 to the other bead groove 54 is suitable to allow the operation tail or the needle accommodating portion 312 of the rotating inner sleeve 30 to push the inclined surface 311 relative to the locking ball 20; the elastic ball 51 And the channel 52, bead grooves 53, 54 provide a reference for the operator to rotate the rotating inner sleeve 30; From the inside to the outside, fill in the bouncing ball 51, the spring 55 and then close the port of the hole with a countersunk screw 56.

A rotation angle limiting structure, as shown in Fig. 2, Fig. 4, Fig. 6A, Fig. 6B, includes a slot 34 and a protrusion 16 arranged at the opposite end of the swivel inner sleeve 30 and the stop body 15 of the body 10, the slot The width of the groove 34 is greater than the width of the protrusion 16, and the distance that the bouncing ball 51 moves from one of the bead grooves 53 to the other bead groove 53 is suitable for any groove end of the groove 34 to be against the protrusion. 16, so that the user cannot continue to rotate the rotating outer casing 40, and it is also used as a reference for the operator to rotate the outer casing 40.

A fixed back cover 41, as shown in Figures 1, 2, and 3A, the fixed back cover 41 is tightly fit and pivotally sleeved on the upper section of the body 10, and covers part of the surface of the rotating outer cover 40. A limiting sleeve 42 is provided outside the main body between the fixed rear sleeve 41 and the rotating inner sleeve 30 to prevent the axial movement of the rotating inner sleeve 30 and 40 .

The above-mentioned structure pattern about this case, its operation and action mode are explained as follows.

As shown in Fig. 5B and Fig. 6B, the rotating outer cover 40 is rotated in one direction to drive the rotating inner cover 30 to rotate. At this time, three synchronous actions will be produced: one series of bouncing beads 51 are formed by one of the bead grooves 53. Move out, slide to another bead groove 54 through the channel 52; the second series of rotating inner sleeve 30 rotates, which is equivalent to making the protrusion 16 move from one end of the groove to the other end, and is stopped by the end wall of the groove The rotating inner sleeve 30 of its three series of rotations makes the pushing inclined surface 32 spin away from the needle roller 20, and corresponds to the needle roller 20 with its needle roller accommodating portion 33, providing space for the radial retreat of the needle roller 20. After the above-mentioned three synchronous actions are satisfied, the user can insert the positioning part 81 of the drill bit 80 into the drill bit piercing hole 13 of the body 10, and the head end of the positioning part 81 can push against the beveled surface of the end of the needle roller 20 so that It retreats radially into the needle roller accommodating portion 33 , and the positioning portion 81 of the drill bit 80 can smoothly enter the drill bit piercing hole 13 . At this time, as shown in Figure 5A and Figure 6A, the user rotates the rotating outer cover 40 in the opposite direction to the above-mentioned direction, and drives the rotating inner cover 30 to rotate. At this time, three synchronous actions are also produced: one is to bounce The bead 51 is removed from one of the bead grooves 54, and slides to the other bead groove 53 through the groove 52; the second is to rotate the inner sleeve 30, which is equivalent to making the protrusion 16 move from one end of the groove 34 to the other end , and is blocked by the end wall of the groove 34; the third is that the rotating inner sleeve 30 rotates the needle roller accommodating part 33 away from the needle roller 20, and the pushing slope 32 is constantly pushed against the needle roller during the process. 20. Push the needle roller 20 into the needle roller groove 82 of the positioning part 81 of the drill bit 80, and position the inserted drill bit 80 axially and rotationally. Start the transmission device, and its power shaft drives the body 10 to rotate. This rotation should cause the needle roller 20 to generate a force toward the end of the pushing inclined surface 32, so that the pushing inclined surface 32 can be more and more pressed against the needle roller 20 to maintain the drill bit. 80 stable.

On the contrary, when unloading this drill bit 80, its mode of operation is as described in the previous paragraph, but the direction is opposite.

During the process of detaching or assembling the drill bit 80 , when the user rotates the rotary housing 40 , the slight resistance of the bouncing ball 51 moving in the groove 52 and the bouncing in one of the bead grooves 53 or 54 can be used. It is known that it has rotated to a predetermined position, and the end wall of the slot 34 and the protrusion 16 can also limit the angle at which the user rotates the rotating cover 40 to ensure that the needle roller 20 and the needle roller are accommodated. Part 33 or the relative position of pushing inclined surface 32.

Except that the positioning part 81 of the above-mentioned drill bit 80 and the drilling hole 13 are circular sections, as shown in Figure 7 and Figure 8, the positioning part is a polygonal cylinder 811, 812 such as hexagonal or square. The holes 131 and 132 have opposite cross-sectional shapes, and the function of tool rotation positioning is also achieved through the combination technology of multi-angle hole columns.

As shown in FIG. 9 , the needle roller 20 of the above embodiment can be replaced by the locking ball 201 , and the elongated hole 14 of the positioning portion 81 can be a bead groove 141 to cooperate with the locking ball 20 .

To sum up, the user can drive and rotate the rotating casing 40 with one hand, and assemble and disassemble the drill bit 80 with the other hand. The action is simple and fast, and the positioning of the drill bit 80 is reliable. And the above-mentioned structure of the present invention is applicable to the drilling form (for example drilling cement wall hole) that needs low rotating speed and high torsion force.

Although this case is illustrated with a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of this case. The above-mentioned embodiments are only used to illustrate the present case, and are not intended to limit the scope of the present case. All modifications or changes that do not violate the spirit of this case belong to the scope of the patent application for this case.

Claims (10)

1. A rotary quick-release chuck structure, characterized in that: A body (10), the center of which is penetrated by a shaft hole, the upper part is a power shaft hole (12), and the lower part is a drill hole (13), for the positioning part (81) of a drill bit (80) to pass through it ; A drill bit axial and rotational positioning structure, at least one long hole (14) is set on the wall of the main body (10) relative to the drill hole (13), and a needle roller (20) is filled in the long hole (14) ; The surface of the positioning part (81) of the drill bit (80) is provided with at least one concave needle roller groove (82), so that when the needle roller (20) moves radially inward to the limit position, part of its peripheral edge is clamped on the roller In the needle groove (82); A rotating quick-release group, mainly a rotating inner sleeve (30); the rotating inner sleeve (30) is pivotally sleeved on the lower section of the body (10) relative to the position of the needle roller (20) ; The inner wall of the rotating inner sleeve (30) is chamfered along the circle to form at least one pushing slope (32) and a needle roller accommodation portion (33). 2. The swivel quick-release chuck structure according to claim 1, characterized in that: the chuck structure further includes a rotation angle control structure, and the rotation angle control structure includes a radially disposed on the rotation The wall of the inner cover (30) and the bouncing ball (51) that can elastically reciprocate, and a groove (52) that is located on the surface of the body (10) for the sliding of the bouncing ball, the groove (52) Both ends are respectively a deep bead groove (53)(54). 3. The rotary quick-release chuck structure according to claim 1, characterized in that: the chuck further includes a rotation angle limiting structure, which is a rotation inner sleeve (30) and the body ( 10) The groove (34) and protrusion (16) at the opposite place, the width of the groove (34) is greater than the width of the protrusion (16). 4. The swivel quick-release chuck structure according to claim 1, characterized in that: the chuck further includes a fixed rear sleeve (41), and the fixed rear sleeve (41) is tightly fit and pivotally sleeved on the body ( 10) Upper section. 5. The swivel quick-release chuck structure according to claim 4, characterized in that: there is an additional limit outside the body (10) between the fixed rear sleeve (41) and the rotating inner sleeve (30). Bit cover (42). 6. The rotary quick-release chuck structure according to claim 1, characterized in that: the rotary quick-release assembly further includes a rotary outer cover (40), the rotary inner cover (30) and the rotary outer cover ( 40) A concavo-convex fitting interembedding structure (35) (45) is provided on the opposite joint surface. 7. The swivel quick-release chuck structure according to claim 1, characterized in that: a groove is formed around the middle section of the outer body of the needle roller (20), and a gap sealing ring (21) is filled in the groove. 8. The collet structure according to claim 1, characterized in that: the positioning part (811) (812) of the drill bit (80) is set as a polygonal cylinder, and the drill bit pierces the hole (131) (132) as the opposite cross-sectional shape. 9. The chuck structure according to claim 8, characterized in that: the positioning portion (812) of the drill bit (80) is a hexagonal column. 10. The chuck structure according to claim 8, characterized in that: the positioning portion (811) of the drill bit (80) is a rectangular cylinder.

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