JP3579478B2 - Tool holder - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a tool holder for automatically connecting the striking or rotating tool in hand tool machine such as a wafer Nmadori Le or broken fishing hammer, and the substrate sleeve, in the axial direction relative to the base sleeve A slide sleeve which is slidable, the base sleeve being, on the one hand, non-rotatably connected to the drive member of the hand-held power tool for transmitting the working motion and being formed on the other hand for receiving the tool shaft. , the tool axis has a-out small a Kutomo one groove-shaped cutout are close on both sides as viewed in the axial direction, the notch is slidably disposed watermarks within the pores of the substrate Surubu small a Kutomo one locking member is engageable, the sliding sleeve is related of the type that is pressed against a stopper located on the tool side end portion of the tool holder by a spring.
[0002]
[Prior art]
Many variants of such a tool carrier are known in the prior art.
[0003]
For example in the DE 32 05 063 Pat, the tool holder is disclosed as capable of positively satisfactory in its function form. In this case, the locking member is a ball, which in its non-working position is prevented from radial movement by a part of the disk sleeve. Saitama mounting tool axis are pressed me toward either the loaded ring spring force by the end of the tool shaft. The sliding of the ball and the ring is performed against the force of the spring, the ball is also slid and displaced radially against the part of the sliding sleeve that blocks the ball, and then the grooved notch in the tool shaft Can be locked. Disc sleeve to the unlocking of the tool, since it is slid against the spring force of its own I toward or to the drive member, the slide sleeve sphere turn radially again blocked in the tool side It can be displaced. To prevent inadvertent unlocking of the tool, the spring must be correspondingly stiff. However, this means that a large force is required to slide the ball and ring against the spring force when inserting the tool, and the user must transmit this force through the tool. No. That group Dzu rather tool holder in this specification, it is impossible to perform the handling comfort. The said known tool holder has the disadvantage that a large number of components, thus finishing up and assembly are expensive.
[0004]
[Problems to be solved by the invention]
Therefore object of the present invention to provide a tool holder of the type mentioned at the beginning, the handling is simple, and the finish up and assembled to ensure that may be configured with a small number of components to simplify is there.
[0005]
[Means for Solving the Problems]
According to the invention, a locking member slidable in the through-hole is pivotally attached to the spring end of the free and soft spring and to a partial winding of the spring which abuts the slide sleeve under spring bias. On the other hand, the above problem can be solved by being configured to be able to return backward in the axial direction by inserting the tool shaft.
[0006]
【The invention's effect】
When the tool is inserted, the rocking member is only slid against the slight force of the soft spring, while unintentional sliding of the slide sleeve is prevented by the full force of the stiff spring. By changing the structure and pivoting the spring end directly to the locking member, it is no longer necessary to provide a ring. Watermarks without hole slides the slide sleeve for extending inclined, so movement of the locking member to be guided me toward or outwardly in the radial direction during installation of the tool can be tolerated On the other hand, the movement of the tool in the opposite direction can be prevented.
[0007]
Other advantageous configurations of the tool holder according to the invention can be inferred from the description of the following exemplary embodiments and from the features described in the dependent claims.
[0008]
[Explanation of the embodiment]
The drawings show an advantageous embodiment of the invention.
[0009]
In the drawing, only the driving member 6 which protrudes from the casing of the hammer drill (not shown) is shown. This drive member 6 has the shape of a tool spindle that makes a striking or rotating movement. The drive member 6 has at its free end projecting from the casing of the hammer drill a device for transmitting the rotational moment in the form of an outer wedge shaft profile. This outer wedge shaft profile is turned at right angles by a ring groove 8 extending around the outer periphery of the front end of the drive member 6, the depth of which corresponds to the depth of the groove of the outer wedge shaft profile. I have. A flat stopper surface 9 is formed on an end surface of the driving member 6.
[0010]
The tool carrier consists mainly of a base sleeve 1, on the outside of which a slide sleeve 2 which can move axially is guided. The slide sleeve 2 is made of metal or plastic. The base sleeve 1 has two receiving holes with different diameters which are interconnected in the axial direction. The hole with the larger diameter at the rear, opposite the drill hammer, is the hole for receiving the drive member 6 and the second hole with the smaller diameter opening at another front end, A hole for receiving the tool shaft 13.
[0011]
An inclined hole 11 is arranged in a machine-side end region of the base sleeve 1, and a lock ball 12 is slidably provided in the hole 11 as a connecting member for connecting the driving member 6 and the base sleeve 1. Are located. The locking ball 12 engages with the ring groove 8 of the driving member 6 and locks the base sleeve 1 to the driving member 6 in such a manner. The base sleeve 1 has an outer peripheral groove 18 in the outer peripheral area where the inclined hole 11 is provided, and the end 5 c of the conical compression spring 5 having the smaller diameter is immovable in the outer peripheral groove 18. Fixed to. The lock ball 12 is protected from sliding down from the inclined hole 11 by the end 5c of the compression spring 5 which is immovably located in the outer peripheral groove 18. Since there is a margin in the width of the ring groove 8, the base sleeve 1 has a predetermined degree of freedom in the axial direction with respect to the driving member 6.
[0012]
In order to receive a predetermined tool shaft 13 in the tool holder, the tool shaft 13 has at its rear end a flat stop surface 7 with a chamfered corner, which stop surface 7 It is in contact with the stopper surface 9. The axial impact is transmitted from the drive member 6 onto the tool shaft 13 via the mutually contacting stopper surfaces 7, 9. Known tool with a tool holder of the present invention can also be used together also tools such as those described in DE 32 05 063 Pat The example embodiment. The outer surface of the tool axis 13 of such known tool, the points that lie face to face in a diagonal direction, the two groove-shaped closed Ji has notches 15 on both sides as viewed in the axial direction is provided. On the diagonal perpendicular to the cutout 15, the tool shaft 13 is additionally provided with two oppositely located rotary entraining grooves 19 which are open and open at the end of the shaft. A corresponding rotary driver is engaged in the receiving hole of the base sleeve 1 in the driving groove 19. As is clear from FIG. 2, when the tool is inserted, the locking member 3 slidably disposed in the through hole 17 of the base sleeve 1 engages with the notch 15. The through hole 17 is an inclined hole, the outer opening of which is arranged near the machine end, and the inner opening of which is arranged near the tool end of the base sleeve 1. The locking member 3 is a pin whose inner rounded chamfered end engages a notch 15 in the tool shaft 13 and whose outer end is a free soft spring of the conical compression spring 5. It is pivotally connected to the end 5a. Therefore the outer end of the locking member 3 is formed with Kururugiana 10, spring end 5a through the Kururugiana 10 is caught. The spring end 5a is configured to be able to return axially backward with respect to the partial winding 5b of the compression spring 5 that is in contact with the slide sleeve 2 while being biased by the compression spring 5. The force required for this is significantly smaller than the bias of the compression spring 5. This is because the bias is transmitted to the slide sleeve 2 via the partial winding 5b, so that it is only necessary to overcome the bending stress of the spring end 5a. A protective cap 4 is provided at the tool side end of the base sleeve 1, and the protective cap 4 serves as a stopper for the slide sleeve 2 and also protects dust. The slide sleeve 2 is held in contact with the protective cap 4 by a compression spring 5 via a rib 2a.
[0013]
FIG. 1 shows an insertion mode of a tool by inserting a tool shaft 13 into a tool holder. The tool shaft 13 has a chamfer at its end, and the rounded inner end of the locking member 3 rides on the chamfer. At that time the locking member 3 is slid I toward or outwardly relatively small against the spring force it through hole 17 of the soft spring end 5a.
[0014]
As is evident from FIG. 2, after the tool shaft 13 has been completely pushed in, the through hole 17 is located opposite the notch 15 of the tool shaft 13 and the locking member 3 has a soft spring end. The slight pressure of the portion 5a penetrates the inclined hole of the through hole 17 and is pressed by the groove-shaped notch 15. That is, the locking member 3 locks the tool shaft 13 in the tool holder, and allows the tool shaft 3 itself to move slightly in the axial direction. In both the setting operation of the tool and the insertion of the tool, the slide sleeve 2 itself is held in contact with the protective cap 4 except for the end 5a of the hard compression spring 5. When the tool is set, that is, when the locking member 3 is locked in the groove-shaped notch 15, the tool itself is pulled out by applying a tensile force to the tool, whereby the inclined through hole 17 is inclined. The tool-side surface 17a serves as a locking surface for the locking member 3.
[0015]
To remove the tool, as illustrated in Figure 3, the slide sleeve 2 is slid I or toward the machine side against the pressing force of the spring 5 of the conical, the spring by a compression spring 5 at the same time end 5a is also slid I toward or backward. At the same time, the spring end 5a pulls the locking member 3 out of the through hole 17. This releases the front hole of the base sleeve 1 so that the tool can be pulled outward by the tensile force.
[0016]
Due to the difference between the spring force acting on the slide sleeve 2 and the spring force acting on the locking member 3, it is possible to insert the tool without consuming any force, while unintentionally releasing the tool from the slide. It is blocked by the sliding of the sleeve 2. The inclination of the see-through hole 17 allows the locking member 3 to be pulled back by sliding the slide sleeve 2, and at the same time serves as a lock member against pulling out of the tool when the slide sleeve 2 does not slide. . The inventive structure of the tool holder requires a smaller number of individual parts and significantly less complex molding of the individual parts compared to the prior art tool holders. That there is no need or the locking member molded or mounted or 1 body for sliding sleeve 2 to the locking member 3 when e example. Thus, known tools can be used with this tool carrier, in which case even at high speeds, there is only a slight imbalance.
[0017]
The present invention is not limited to the illustrated embodiment, hand tool machine, in particular also be used in the case of Hanmadori Le or broken fishing hammer, in which case the base sleeve 1 and the drive member 6 is separate from Linked together in a format. That or screwed to a base sleeve 1 if e examples and driving member 6, or it is conceivable to form the base body sleeve 1 and the drive member 6 in one body. In that case, the driving member 6 is formed in a hollow shape so as to penetrate and engage the impact body. In particular, the invention relates to a combined tool holder, in which the described tool holder for a grooved tool is additionally provided with a tool holder for a round spindle tool configured as a jaw chuck. It can also be used in the case of
[Brief description of the drawings]
FIG. 1 is a view of a tool holder according to the present invention when a tool is inserted.
FIG. 2 is a view of the tool holder of the present invention when a tool is inserted.
FIG. 3 is a view of the tool holder of the present invention when the tool is removed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base sleeve 2 Slide sleeve 3 Locking member 4 Protective cap 5 Compression spring 5a Spring end 5b Partial winding 5c End 6 Drive member 7 Stopper surface 8 Ring groove 9 Stopper surface 10 Eye 11 Hole 12 Lock ball 13 Tool shaft 15 Cutting Notch 17 Through hole 17a Surface 18 Outer peripheral groove 19 Rotational entrainment groove

Claims (5)

A tool holder for Ha Nmadori le or to automatically connect the tool for striking or rotating the hand tool machine such as a broken fishing hammer axis basic sleeve (1), with respect to the base sleeve (1) A sliding sleeve (2) which is slidable in one direction, said base sleeve (1) being, on the one hand, non-rotatably connected to a drive member (6) of a hand-held power tool which transmits the working movement and, on the other hand, is formed for receiving the tool shaft (13), said tool shaft (13) has a-out closed Ji small a Kutomo one groove-like cutouts are on both sides as viewed in the axial direction (15), the notch (15), eyeholes (17) slidably arranged small as Kutomo one locking member in (3) of the base sleeve (1) is engageable, the sliding sleeve (2) The tool is held by the spring (5). In those formats that are pressed against the stopper located on the tool side end portion of the body,
A locking member (3) slidable in the through hole (17) is pivotally attached to the spring end (5a) of the free and soft spring (5) and slides under the bias of the spring (5). A tool characterized in that it can be returned axially rearward by inserting a tool shaft (13) into a partial winding (5b) of a spring (5) abutting on a sleeve (2). Holding body. Eyeholes basic sleeve (1) (17), extends so as to approach the end portion I toward either the tool-side end of the inclined extending and tool holder with respect to the axis of the base body sleeve (1) The tool holder according to claim 1, wherein the tool holder is provided. The spring (5) is a conical compression spring, the drive-side end (5c) having the smaller diameter thereof being fixed in the circumferential groove (18) of the base sleeve (1). The tool holder according to claim 1, wherein the tool holder is provided. The circumferential groove (18) is interrupted by an opening ( 11 ) in the base sleeve (1), the opening ( 11 ) being a connecting member for connecting the base sleeve (1) and the driving member (6). The tool holder according to claim 3, wherein the tool holder is provided for mounting (12). The outer end of the locking member (3) is formed Kururugiana (10), through the Kururugiana (10) spring end of the spring (5) (5a) is engaged wherein the are, the tool holder as set forth had not Re of claims 1 to 4.

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