JPH03504943A - keyless chuck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] A keyless impact chuck has a split nut that engages the jaws and a relatively It requires rotation. Split nuts are traditionally pressure fitted onto the split nuts. Rotation is prevented by a retainer (collar) that is attached. Regarding these chucks The impact mechanism acts on the retainer or other parts upstream of the retainer (collar). add a shock to the target. This means that when the jaws are rotated and therefore actuated, This means that the collar must transmit impact energy to the split nut. Taste. This creates a pressure fit between the collar and the split nut and applies impact stress. pressure fit, but the stress will result in a loss of force fit. .

It is an object of the invention to avoid stressing the force fit due to impact energy. The purpose is to improve the reliability of a keyless impact chuck.

Typically, the impact force on the impact projection depends on whether the jaws are opened or closed. and are inclined at different angles to the axis of the chuck. This impact angle is larger in the opening direction than in the opening direction, and thus can be applied to opening the collar The force is always the force applied to occlude the jaws. In theory, this means that This means that it is always possible to open the jaws and remove the tool. It takes The disadvantage of this configuration is that the applied force forces the jaws to open and push against the chuck body. Because of the dense contact, it is possible that the force available in the occluding direction cannot free the show. It is a matter of gender.

The aim of the invention is to solve this problem.

cross reference The present invention relates to a keyless impact chuck, and the present invention relates to a keyless impact chuck, commonly owned by U.S. Pat. This invention relates to an improvement of the chuck disclosed in No. 8.

Summary of the invention The present invention provides impact protrusions directly on the split nut and allows these protrusions to rotate. When engaging a protrusion that is restrained so that it does not move, a shock is applied directly to the split nut. , the retainer (collar) is to prevent impact energy from being transmitted. Lite Its function is simply to prevent rotation of the split nut in the assembled position. It only fulfills its function.

The present invention moves the interference member or protrusion in the axial direction and engages the split nut in the chuck. An operating member is provided that acts to engage and disengage the interference member or protrusion. shaft The interference member movable in the direction engages with the interference member of the split nut and is restrained from rotating. When bundled, assuming the chuck is driven by the spindle, the nut also Also, rotation is stopped, and the jaw chuck opens depending on the rotation direction of the chuck body. or become obstructed. The actuating member is activated when the shutter approaches the fully open position. positioned so as to be engageable by the jaws. Next, the collar is the actuating member Move the jaw backward to release it from engagement with the interference member, and push the jaw into a wedge shape in the open position. The jaws are prevented from opening further before reaching the retracted or jammed position.

More specifically, the actuating member is a sleeve provided on the chuck body. child The sleeve has an inner groove that is engageable by the jaws. This groove is Joe's It has a shape that can provide a surface that is substantially perpendicular (perpendicular) to the direction of movement.

A further feature is that the axially movable interference member is part of the sleeve. .

Brief description of the drawing FIG. 1 is a side view of a power drill equipped with a chuck embodying the present invention; Figure 2 is a vertical sectional view of the chuck mounted on the new drive spindle; Figure 3 is a cross-sectional view taken along line 3-3 in Figure 2, and Figure 4 is a cross-sectional view taken along line 4-4 in Figure 2. A sectional view, FIG. 5 is a partial schematic diagram of the protrusion, Figure 6 shows a slightly deformed chuck (mounted) screwed onto a standard threaded spindle. Vertical cross-sectional view of (not deformed), FIG. 7 is a vertical cross-sectional view of yet another chuck.

Detailed description of the invention Hand drill 10 has a conventional pistol grip 12 and operates a power switch. A trigger 14 and a front/rear control device 16 are provided. Gear case 20 It is attached to the front part of the drill housing by the same It surrounds the speed gear. The groove 84 of the case 20 allows the screwdriver to allow access. The drive main shaft 18 extends outside the front of the gear case 20. , is pivotally supported by a bearing 68 which is prevented from rotating by an arcuate retainer 69.

The main shaft is a smooth cylindrical mount 15 that exceeds the shoulder 17, and the mount 15 It has a reduced diameter end 19 exceeding . The main axis is between the mount 15 and the shoulder 17. The diameter of the point 21 is reduced, and the smooth hole 27 of the main body is attached to the mount 15. when the surface 23 is firmly engaged by the shoulder 25 of the chuck body 24. I will do it.

When mounted in this manner, the diametrically opposed projections 29 on the main shaft 18 are It engages within the slot 31 of the body 7 flange. The screw hole 35 of the main body has a reduced diameter of the main shaft 18. It will fit on top of the end 19. At this time, the screw 35 has no function.

These screws 35 are used to attach the chuck onto the mandrel during chuck manufacture. Finish polishing the roller so that it is concentric with the chuck body, and the chuck is installed on the spindle. It is used to ensure that the shear is concentric with the main axis 18 when the shaft is rotated. Chat The shaft is prevented from rotating on the main shaft 18 by a screw 26 screwed onto the end of the main shaft. Retained. is transmitted to the main shaft via the screw 26 through the screw connection of the chuck. There is no torque. All torque is transmitted through the drive protrusion 29. Therefore, Cha The hook can be easily removed by pulling it apart and rotating it in the opposite direction. When the screw (such as 26) is no longer damaged.

This attachment is applicable to keyed and keyless chucks.

Three slanted holes 28 are formed in the main body, and the slanted surface 3-504943 (3) Each of the diagonal holes 28 has a groove in response to relative rotation between the split nut 32 and the jaws. A jaw 30 is mounted for movement within the inclined hole 28. The split nut 32 is Split type nut retainer 34 in the form of a ring-shaped collar that is pressure-fitted to a type nut It is held in the assembled position by the The retainer 34 and split nut are normally rotates with the body 24, but holds the split nut and retainer from rotating. When the main body is rotated with respect to the split nut, the jig 5-30 is attached to the main body. Depending on the direction of rotation, it moves upward or downward in the inclined hole to open or close it.

The clutch sleeve 36 has a protrusion 38 that faces the protrusion 40 of the split nut 32. provided. When the clutch sleeve 36 moves to the left in FIG. Engage at 4°. The right end of the sleeve 36 has an inwardly extending flange segment 4. 8, while a spline ring 80 fits between the segments 48 and thus The spring 56 is compressed between the spring seats formed in this manner. spline ring 80 tightens the screw 79 until it firmly engages the gear case 2o. By tightening it in the bolt 81, it can be held so as not to rotate.

Thereby, the sleeve 36 is held unrotatable. Therefore, the sleeve protrusion 38 When engaged with the split nut protrusion 4o, the split nut 32 is also held unrotatable. , the main body 24 and the split nut 32 are rotated relative to each other. With this, Ji! !　 30 moves upward or downward within the inclined hole 28 depending on the rotational direction of the clutch body 24. Move to open or close the sciller.

FIG. 5 shows details of the projections 38,40.

Ji! + 30, the main shaft 18 and chuck body 24 are forward (F) or backward (R) Open or close depending on whether it is driven in the direction. Chuck is in front (F ), the interlocking surface 42.4 of the protrusion 38.40 4 are at an angle of 27@ with respect to the axis of the chuck, as shown in Fig. 5. tilt. This angle is quite steep and extremely large relative to the protrusion 40. This tends to apply an impact force to forcibly close the jaws. Jaw grips tool When the clutch sleeve 36 cannot be moved, the face angle should be adjusted to move the clutch sleeve 36 toward the gear case. The cam moves in the opposite direction to release the engagement of the protrusion. When the operator presses the clutch three If you keep pushing the tab 36 toward the split nut, the non-rotating protrusion 38 will push the split nut into place. re-engages the protrusion 40 of the tip and applies a repetitive impact force. This is controlled by the operator. It will be repeated as long as it continues. This structure allows Schiller to meet all the usual requirements. Sufficient closing force is provided to match the

Releasing the chuck is another thing. In this design, the forward/backward switch switch 16 is actuated to drive the chuck in the opposite direction (R). This means that the axial The sleeve 36, which is movable in the direction of 0, the inclined surfaces 64, 66 align with the axis of the chuck as shown in FIG. means inclined at an angle of 230 to the line. This angle is the closed form of the jaw. This allows the jaws to form a 27" face angle in the closing direction. The tangential force is greater in the direction of opening the shiller than is obtained when the direction is It acts on the split nut 32. Therefore, opening is ensured and the key or chuck lens is securely opened. There is no need to operate the chuck at the machine. This system releases the chuck It provides sufficient repetitive impact force. The Schiller will not release at the first impact. However, the operator applies a series of rapid impact forces while holding the sleeve forward. This will open the chuck.

Impact force can be considered to be a spike force that is much larger than the friction between parts. . However, if the operator holds the sleeve 36, it will not work! ! -30 is completely released A problem arises when driving the device to the maximum position. As a result, without the present invention, the silica - can be wedged into the open position. Schiller is applied in the closing direction. Because it is driven and opened by an impact force greater than the force that can be applied, the shutter is in the open position. may become irreparably trapped. The problem is that Schiller is clutch positioning the clutch sleeve in a position such that it can be engaged by a second sleeve; As shown by the dotted lines in the figure, each groove is attached to the inside of the clutch sleeve 36. ! -30 inner end The receiver is relaxed by this design in which the cut-and-raised portion 46 is formed at a position where it can be inserted. this The jaws are also driven to abut against the clutch sleeve 36, and the sleeve to the right, before the sealer has a chance to release due to the pushing force. It is now possible to release the holder 38 from engagement with the protrusion 40. Such automatic release This prevents the user from accidentally locking the jaws into the open position. I can do it. The inner end of the jaw 30 is aligned in a plane perpendicular to the direction of movement of the jaw. It will be understood that the push-in movement is not possible.

It has been described that the sleeve 36 is biased rearward (rightward). next, This structure will be explained.

The flange segment 48 at the right end of the sleeve 36 is connected to the compressed spring 56. Form a spring seat. This spring also rests on an axially fixed segment 58. Also sit down. Therefore, the spring biases the sleeve 36 to the right, causing the retainer ring to 70 restricts movement to the right.

The clutch sleeve 36, spring 56, and ring 70.80 hold the chuck on the main shaft. Assemble it on the chuck before attaching it.

Another important feature is the nature of clutch sleeve 36. spline ly The clutch sleeve 80 prevents the clutch sleeve from rotating and the user pushes the sleeve forward. When engaged with the protrusion, the protrusion engages and applies an impact force to push the sleeve backward. The sleeve reciprocates accordingly and the user pushes the sleeve forward again. if desired , ring 80 may be rotatable. As a result, the clutch sleeve It can be rotated slightly depending on the impact force. The slight rotational force applied to the sleeve is Subject to resistance by the user who is unable to detect or feel the difference. The sleeve is Due to the slight rotation upon impact, some impact force or magnitude is lost.

In the field, there are many drills that do not have a groove that reaches the screw. Special table 103-504943 (4) that prevents the rotation of the switch sleeve A keyless chuck that can be installed without any additional means is a desirable product.

Mounting the chuck on a smooth cylinder and driving the chuck through the projections This prevents the chuck from being wedged onto the spindle. . The screws 26 will not become jammed or jammed. the screw does not transmit torque; It simply holds the chuck so that it does not rotate on the main shaft. Chuck removal This design allows the jaws to be properly aligned concentrically with the main axis of the chuck. The screws 35 necessary for polishing are still provided. Do not modify the chuck at all. Instead, use screw 33 to attach the chuck onto the threaded spindle of an existing tool. It is important to understand that you can

This is illustrated in FIG. It only has a threaded end 115 that threads into the body screw 35 until it is seated. are doing. In this form, i.e. the driving force is transmitted through the screw, so that the above-mentioned There is no driving protrusion with the drawbacks of

This structure is immediately marketable for all threaded spindle tools in the field. It is. This chuck also eliminates the need for the spline ring 80 shown in FIG. This means that although the sleeve 36 is rotatable, it cannot be rotated by the user applying a slight force. This means that it can be prevented from rolling over. This chuck is suitable for pressure fitting It has the added benefit of avoiding impact forces and automatically releasing the engagement. It is something that makes you laugh.

An important feature of the invention is the opportunity for the jaws to be wedged into the fully open position. The purpose is to automatically disengage the sleeve before this occurs. Another invention of the present invention One important feature is the nature of clutch sleeve 36. spline ring 80 prevents the clutch sleeve from rotating and the user pushes the sleeve forward to engage the protrusion. When aligned, the protrusion engages the sleeve and applies an impact force and pushes the sleeve backward. As the sleeve moves, the sleeve reciprocates in the axial direction, and then the user moves the sleeve. Push forward again. The cost of preventing rotation is eliminating the need for spline rings. This can be avoided by As a result, the clutch sleeve becomes rotatable.

The slight rotational force applied to the sleeve causes the user to be unable to detect or feel the difference. subject to the resistance of the During impact, the sleeve rotates slightly, so impact force or large The quality is somewhat lost. Also, some users hesitate to grasp rotating parts. For these users, a non-rotatable sleeve is desirable.

Another variant and significantly simplified embodiment is illustrated in FIG. , spring 156 biases sleeve 136 against protrusion 138, 140 at all times. The sealer works to release the protrusion before it becomes clogged and cannot be released. do. Spring 156 is machined onto corner 137 (inside the sleeve) and body 124. It is compressed between the machined shoulder 170. This is a modification of the protrusion drive mechanism. This is an example, but any form is possible. The protrusion 129 engages the recess 131. It matches. Sleeve 136 typically rotates with the chuck, and the user can Prevents opening or closing by the chuck.

The attached drawings follow this order of operation, and Figure 7 shows the final (current) The design is illustrated. This seems to be more compact and more conventional. ``see''. It is mounted on a threaded or unthreaded spindle and automatically engages. to avoid transmitting torque through the force fit.

This design also allows the radial slot 131 to , has the advantage of allowing access to spring 136 with a screwdriver blade. . In this way, the spring can be removed and maintained.

If the chuck comes off the tool, there is a risk of damaging the spring due to incorrect handling of the chuck. There is no such thing. In this way, when the sleeve is pulled back, the spring 156 is "Shirakarishi" limits the movement of the sleeve and thus prevents overstressing the spring. I can do it.

Submission of translation of written amendment (Patent Law Article 184-7 Section 11 October 1990 to λ71 Toshi Ueki, Commissioner of the Patent Office 1. Display of patent application PCT/US89101945 2. Name of the invention keyless chuck 3. Patent applicant Address: Brookfield, U.S.A. 53005, Rice Consin, USA West Lisbon Road 13135 Name: Milwaukee Electric Ku Tour Corporation 4, Agent September 4th, 1989 6. List of attached documents (1) Translation of written amendment Scope of claims after amendment [Received by the International Bureau on September 4, 1989 Original claim 2 has been deleted, original claim 1 has been amended, and original claims 3-10 have been renumbered. 1. A chuck body having a body with equally spaced tilts around the periphery of said body. three shutters mounted on the main body on an oblique axis and surrounding the jaws; and a split nut having a threaded connection to the show, whereby: The show increases the tilt in response to relative rotation between the body and the split nut. movement on an oblique axis, which causes the jaws to move forward and inward to prevent occlusion. said split nut to be opened by opening or moving rearwardly and outwardly; a retainer that press-fits onto the mold nut and maintains said split mold nut in an assembled condition; and means for holding the split nut against rotation in the chuck body. axially moving between first and second positions relative to said split nut; a sleeve member mounted on said body for access and separation; A recording means, A first interference member integral with the sleeve and a second interference member integral with the split nut. member, which is caused by the sleeve moving axially toward the split nut; Therefore, when engaged, the interference member of the sleeve is placed in front of the split nut. said second interference member, and when said sleeve is prevented from rotating. prevent the split nut from rotating, thereby preventing the body from rotating; As a result, the main body and the split nut rotate relative to each other, and the jaw engages the nut. before being able to open or close depending on the direction of rotation of said body relative to the the interference member; The impact force acting on the second interference member acts directly on the split nut, causing an impact No impact force is transmitted from the second interference member to the split ring through the force fit. A chuck characterized by being prevented from being transmitted.

2. The combination according to claim 1, wherein the sleeve is connected to the clamp. A combination body characterized by comprising means for preventing rotation together with the chi body. .

3. The combination according to claim 2, wherein the sleeve is biased. A combination body characterized by comprising means for separating the split nut from the split nut.

4. The combination according to claim 1, wherein the sleeve is formed into the split mold. A combination body characterized by comprising means for biasing the body toward the nut.

5. The chuck according to claim 1, wherein the tilt axis is located on the chuck body. The jaws move forward and inward on the axis to completely occlude the position while moving rearwardly and outwardly on said tilt axis to a fully open position. said means for holding the forward split nut against rotation; a sleeve mounted on the body for movement in the direction; The outside of the sleeve is manually engaged so that the sleeve can be moved axially. is, Special table Hei 3-504943 (5) As the jaw approaches the fully open position, the sealer the sleeve moves to bring the second interference member into contact with the first interference member. A sleeve characterized in that it is released from engagement.

6. The combination according to claim 5, wherein the interference member engages with the front The interference member on the sleeve is released from engagement with the interference member of the split nut. When released, the sealer is pressed against the groove. It is characterized by comprising a gouge groove formed on the inner side of the sleeve in an aligned state. combination body.

7. The combination according to claim 6, wherein the groove is formed in a longitudinal direction of the jaw. A combination body characterized by having a surface substantially perpendicular to the road.

8. The combination according to claim 7, wherein the sleeve is connected to the chamfer. A combination characterized by comprising means for preventing the lock from rotating together with the lock body. body.

9. Range of requirements The combination described in item 8 is used to bias the sleeve. A combination body characterized by comprising means for separating the split nut from the split nut. .

international search report

Claims (10)

[Claims] 1. Three jaws are supported on inclined axes equally spaced around the chuck body. and a chuck of the type having the chuck body, a split nut surrounding a jaw and having a threaded connection to the jaw; This allows the jaw to respond to relative rotation between the body and the split nut. the split nut for moving on the inclined axis in response to the split nut; press fit into the split nut and maintain the split nut in an assembled state; The combination includes a retainer that means for holding the split nut so that it does not rotate together with the chuck body; and moves axially between first and second positions to approach the split nut. and a member removably mounted on the body; is integral with both the member and the split nut to prevent the member from rotating; by engaging and preventing rotation of the split nut when held in place; Depending on the rotation of the body, the body rotates to open or close the jaws. an interference member configured to cause the retainer on the split nut to The press-fitting of the split nut causes stress due to the impact force acting on the interference member of the split nut. A combination body characterized by being improved so that it does not cause damage. 2. The combination according to claim 1, wherein the member moves in an axial direction. an assembly characterized in that it comprises a sleeve mounted on said body so as to obtain Combined body. 3. The combination according to claim 2, wherein the sleeve is A combination characterized by comprising means for preventing the switch from rotating together with the switch body. body. 4. The combination according to claim 3, wherein the sleeve is biased. A combination body characterized by comprising means for separating from the split nut. 5. The combination according to claim 2, wherein the sleeve is attached to the split mold. A combination body characterized by comprising means for biasing towards the nut. 6. The combination according to claim 1, wherein the tilt axis is a chuck. Positioned relative to the axis of the body, the jaws move forward and inward on the axis to completely While moving toward the closed position, it moves backwards and outwards on the tilted axis to the fully open position. said means for holding the front split nut against rotation; , a sleeve mounted on the body for axial movement; The outside of the sleeve is manually engaged so that the sleeve can be moved axially. is, When the jaw approaches the fully open position, the jaw engages the sleeve. the sleeve moves to bring the second interference member into contact with the first interference member. A combination body characterized by being released from engagement. 7. The combination according to claim 6, wherein the interference member engages with the front The interference member on the sleeve is released from engagement with the interference member of the split nut. the jaws such that when released, the jaws are pressed against the grooves; It is characterized by comprising a gouge groove formed on the inner side of the sleeve in an aligned state. combination body. 8. 7. The combination according to claim 7, wherein the groove is formed in a longitudinal direction of the jaw. A combination body characterized by having a surface substantially perpendicular to the road. 9. The combination according to claim 8, wherein the sleeve is connected to the chamfer. A combination characterized by comprising means for preventing the lock from rotating together with the lock body. body. 10. The combination according to claim 9, wherein the sleeve is biased. A combination body characterized by comprising means for separating the split nut from the split nut. .