JPH02198706A - Chuck for rapid replacement - Google Patents

Abstract

PURPOSE: To supply a cooling agent inside a tool performing threading by communicating one end of an internal conductor of a journal coaxial with a tool mounting part with a cylindrical opening by extending it up to a housing and the other end with a cooling agent supply pipe through a communicating hole. CONSTITUTION: A speedily exchangeable chuck 10 leads a cooling agent led in a compressed condition into a compression space 30 through a cooling agent supply port 37 and a supply pipe 59 of a receive part 11 into the axial direction through a communicating hole 36 of a journal 29, an internal conductor 35, a through hole 61 of a packing plug 60 in a tool mounting part 26, and a guide hole at the center of a tool 27. In this case, since a diameter of a packing 56 between a cylindrical part 38 of the journal 29 and a guide bush 43 is the same as a diameter of a packing 57 between a guide bolt 41 of the journal 29 and the receive part 11, the journal 29 and the guide bush 43 do not receive an action of pressure of a cooling agent so that a length compensation and adjustment mechanism 31 is not adversely affected. In this way, it is possible to guarantee smooth operation of the length compensation and adjustment mechanism irrespective of internal introduction of the cooling agent.

Description

Detailed Description of the Invention Purpose of the Invention The present invention is used for thread cutting, etc., as stated in the preamble of the first claim. This invention relates to a quick-exchange chuck equipped with a tool mounting part that allows quick exchange of tools.

This type of quick-change chuck has been known for some time (
(see, for example, German Utility Model No. 7022326, US Pat. No. 4,547,105) have mechanisms for length compensation which operate satisfactorily. This length compensation mechanism is effective against tension and compression of the chuck, and allows compensation for deviations between tool feed and screw pitch. In order to improve the efficiency of thread cutting, etc., it is necessary to cool the cutting oil and carry out chips by introducing a coolant inside the tool.

The object of the present invention is to provide a quick-change chuck as defined in the preamble of the first claim, which is capable of supplying a coolant inside a tool for cutting etc. Moreover, by providing a quick-change chuck that satisfies all requirements for length compensation, which still operates reliably and smoothly during tension and compression of the chuck, even when the supplied coolant is highly compressed. be.

Structure and Effects of the Invention This problem is solved according to the present invention in the first aspect of the claims.
This is achieved by incorporating the features described in the characterizing part of the first claim into a quick-change chuck as described in the preamble of the claim. In this way, the coolant is guided to the quick-changeable tool mount fitted in the chuck, as well as to the tool for threading etc. mounted on said tool mount. Despite its compactness, this quick-change chuck operates smoothly and is formed from only a few components.

Moreover, these components correspond at least in terms of structure to the known quick-change chucks of this type, differing only in some details. At the same time, even when the supplied coolant is introduced in a highly compressed manner, no additional axial force acts on the length compensation mechanism, thus preventing the introduction of the coolant into the interior. Regardless, the requirements for ensuring reliable and smooth operation of the length compensation mechanism are met by the invention.

Advantages of the invention become apparent from the second and third to fifth claims. As part of the length compensation mechanism, the guide bushing functions as a length compensation spring device for tension and compression of the chuck using simple means. Furthermore, the guide bush guides the associated journal of the housing during a compensating movement in the axial direction, and at the same time guides the same journal during a compensating movement in the opposite axial direction. At this time,
The journal and guide bush cooperate to reposition relative to the receiver. The guide bushing also guides the journal by being guided into the receiving part. This guide bush is a simple component with a small diameter, so that the radial size of the chuck is not practically changed.

Further advantages of the invention emerge from the claims 6 to 19. According to the features recited in claims 14 and 15, on the basis of the same size of diameter in the area mentioned here, the system consisting of the guide bush and the journal is such that the liquid coolant is compressed. is in a state of hydraulic equilibrium. Alternatively, the forces exerted on the ring-shaped surfaces of the journal and/or guide bushing under the pressure of the liquid coolant can be sufficiently compensated in the axial direction. Therefore, even if the coolant introduced into the interior is strongly compressed, no additional force in the axial direction is exerted on the length compensation mechanism, which ensures reliable and smooth operation of the length compensation mechanism. continues to be maintained. Also, measures that are detrimental to the required length compensation, which not only cause significant damage to the spring, but also nullify the smooth operation of the length compensation mechanism, especially its sensitivity, The spring of the length adjustment mechanism can be reinforced without removing it.

Further advantages of the invention emerge from the 20th to 30th claims. In the case of these configurations, compensation for the axial forces exerted on the water conduit during the introduction of the coolant into the central part within the journal is also achieved. The components of the length compensation mechanism are hydraulically compensated. Furthermore, claims 26 to 3 of the scope of claims
Based on the features recited in claim 0, the smooth operation of the chuck is further improved.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The quick change chuck (10) shown in FIG. 1 is particularly intended for use in thread cutting and the like. This quick exchange chuck (10) has a receiving part (11) and a housing (12). In FIG. 1, the receiving part (11) is mounted with its upper end (13) on a spindle of a device not shown, and in this case, this upper end (13)
is formed as a shaft. This shaft can then, for example, be provided with a Morse taper or a steep taper, or it can be provided with a thread and an adjusting nut for axial adjustment and a spring for transmission.

The formation of this shaft is already known.

In FIG. 1, the receiving part (11) has a spatula (14) at its lower end. The head (14) has a cylindrical wall (15
), and inside the cylindrical wall (15) there is a coaxial
A cylindrical opening (16) opening downward is formed. Inside this opening (16) is a housing (1
2) is accommodated and guided in a non-rotatable but relative axially movable manner. An actuating bush (17) is pressed on the outside of the cylindrical wall (15) of the receiving part (11), and the actuating bush (17) has its lower end connected to the housing (12).
for example by a retaining ring (18), so that
The movement of the actuating bush (17) causes the housing (1
2) moves axially relative to the head (14).

The housing (I2) accommodates the head (I2) in a well-known manner, for example in a manner corresponding to German Utility Model Registration No. 7022326 or US Pat. No. 4,547,105.
4). The housing (12) has, for example, three moving balls (19) around its periphery, which balls furthermore have a schematically illustrated ball holding part (20).
axial grooves (21) formed in the housing (12) and partially in the head (14).
) is engaged with an axial groove (22) formed in the wall (15).

The housing (12) has a substantially inverted pot shape, and further surrounds an opening (24) that is coaxial with the cylindrical shape and opens downward, and has an upper end connected to a bottom (25). It has a cylindrical wall (23) sealed by. Into said opening (24) a tool mount (26) is fitted, which allows for quick exchange of a conventional tool, only shown in outline, so that axial and rotational moments can be transmitted. The tool mounting portion (26) supports a tool (27) for thread cutting or the like. Appropriate locking in the axial direction of the fitted tool mounting part (26) and transmission of rotational force are carried out using the usual method (German Utility Model Registration No. 702232).
6), the cylindrical wall (26) of the housing (12)
), these holding balls (28) and moving balls (19) are each spaced apart from each other by an equal angular distance. , i.e. three parts in each case are arranged successively in the circumferential direction at a distance of 60'' circumferential angle.

Further, the housing (12) has a journal (29) coaxial therewith at the other end facing upward in FIG.
support. The journal (29) is connected to the housing (12
) is removably attached to the housing (1
2) through the bottom (25). A guide hole (30) having a larger diameter than the journal (29) coaxial therewith is formed in the receiving part (11) in order to receive the journal (29). This guide hole (30
) is inserted into the journal (29), and the journal (29) is inserted into the housing (
When the housing (12) moves relative to each other in the axial direction, the housing (
12) and relative movement in the axial direction.

Furthermore, the quick exchange chuck (IQ) has a mechanism (31) for length compensation. This length compensation mechanism (31
) acts in the axial direction between the housing (12) and the receiving part (11), and when a relative displacement occurs in both directions along the axial direction, that is, tension and compression of the chuck occur. In this case, the length in the axial direction is corrected. The length compensation mechanism (31) includes at least one spring (32) for compensation against axial movement (pressure 11) on one side and at least one spring (32) for compensation against axial movement (tension) on the other side. A spring (33) is provided. The length compensation mechanism (31) is configured to adjust the receiving portion (11) in one or the other axial direction, which occurs due to a deviation between the feed of the tool (27) and the thread pitch when threading a workpiece. ) and the housing (12), forced inwardly or outwardly against the action of the springs (32) or (33), automatic and smooth elongation during axial compression and tension. Allows for correction.

In addition, the quick-change chuck (10) can be modified according to the well-known method (German Utility Model Registration No. 7022326, U.S. Pat. No. 45471) of the mechanism (40) for enhancing partial compression.
(see No. 05).

The journal (29) has an internal conduit (3) in the form of at least one, for example coaxial, axially extending hole.
5), and the internal conduit (35) extends through at least part of the length of the journal to the housing (12).
and ends in a cylindrical opening (24). The journal (29) also connects the coolant supply port (
37). The internal conduit (35) in particular carries compressed liquid coolant, which is used for simultaneous lubrication and swarf removal in a conventional manner, through the journal (29) and the housing (12) to the tool mounting ( 26). The coolant introduced to the tool mounting part (26) further reaches the outside through the tool (27). The coolant is guided under suitably high compression, which can reach 3-4 bar or even 40 bar or more. The pressure of the coolant is exerted on the inner surface of the journal (29) and the tool mount (26), so that
The housing (12) and the tool mount (26) have a length compensation mechanism (
31) is subjected to additional axial forces which may impair its function.

However, this is prevented by structural measures.

The journal (29) has a substantially axially extending cylindrical portion (38) with a cylindrical outer surface (39).

The journal (29) is connected to the housing (1) through which it passes.
2) at a distance in the axial direction from the bottom (25),
It has a ring-shaped flange (40) having a larger diameter than the cylindrical portion (38) and functioning as a piston. Said ring-shaped flange (40) of the journal (29)
This cylindrical guide bolt (41) consists of a coaxial cylindrical guide bolt (41) having the same outer diameter as the cylindrical part (38), which continues axially from the receiving part (11). A bearing (4) having the same diameter and coaxial as the guide bolt (41) is installed inside the guide hole (30) of the guide bolt (41).
2) and is guided for relative movement in this bearing (42).

The journal (29) is supported by a cylindrical guide bush (43) coaxial with the journal and movable relative to the journal. Further, the guide bush (43) has a receiving portion (1
A cylindrical outer surface (4) is placed inside the guide hole (30) of 1).
5) is received and guided for relative movement via a cylindrical guide part (44). As shown in FIG. 1, the guide bush (43) is axially supported at its lower end surface (46) by the bottom (25) of the housing (12).

The guide bush (43) is attached to the receiving portion (11) in the ring direction toward the tool (27).
radially projecting means, for example a stop (47) in the form of a bolt.

The stopper (47) includes a guide bush (43),
That is, it engages with a groove (48) formed in the axial direction of the guide portion (44), cooperates with the upper end surface (49) of the groove (48), and functions as an end stopper. At the same time, the stopper (47) also collides with the lower end surface (50) of the groove (48), thereby limiting the axial movement of the guide bush (43) in the opposite direction.

As shown in FIG. 1, the spring (32) disposed between the guide bush (43) and the receiving part (11) has its upper end connected to the bottom (
51). On the other hand, the lower end of the spring (32) is supported by a guide bush (43). Another spring (33) surrounds the journal (29), i.e. its cylindrical part (38). The spring (33) has its upper end supported by the ring-shaped flange (40) and its other end supported by the guide bush (43). The guide bush (43) and the cylindrical part (3) of the journal (29)
8), it is clear that a radially extending ring-shaped space (52) is formed in which the spring (33) is accommodated. The guide part (
44) ends at a lower end with a bottom (53) which is penetrated by the cylindrical part (38) of the journal (29), and the annular space (52) also ends in this position. Furthermore, a spring (33) is supported at its lower end by the lower end of the guide part (44). A cylinder (54) coaxial with the guide portion (44) of the guide bush (43) and having a smaller diameter is connected to the guide portion (44), and further,
This cylinder (54) is surrounded on the outside by a spring (32). Further, the cylindrical inner wall surface of the cylinder (54) forms a cylindrical guide that guides the ring-shaped flange (40) of the journal (29). The annular space (52) therefore has a border on the one hand with the bottom (53) of the guide bush (43) and on the other hand with the flange (40) of the journal (29). A guide portion (having a cylindrical outer wall surface (45)
44) transitions from the shoulder (55) to a cylinder (54) with a smaller outer diameter. This shoulder (55) is
Supports the lower end of the spring (32).

a cylindrical portion (38) of the journal (29) and said cylindrical portion (38) at the bottom (53) of the guide bush (43);
8), a seal (56) consisting of at least one seal ring is arranged between the end adjacent the housing. Furthermore, between the guide bolt (41) of the journal (29) and the region of the receiving part (11) remote from the housing penetrated by said bolt (41), in particular the bearing (42), there is at least one packing. Patsukin (57) consisting of a ring
is placed. Cylindrical part (38) of journal (29)
The diameter of the portion of the guide bush (43) that passes through the bottom (53) is the same as the diameter of the portion of the guide bolt (41) of the journal (29) that passes through the bearing (42) of the receiving portion (11). It's the same. Also, Patsukin (5
6) is equal to the diameter of the packing (57). In this way, the requirements for a hydraulic axial compensation of the coolant flowing inside the guide holes (30) and the conduits (35) are fulfilled.

Further, there is a space between the outer surface of the guide portion (44) of the guide bush (43) and the inner surface of the guide hole (30) that guides the receiving portion (11) that accommodates the guide portion (44), that is, the guide portion (44). , a seal (58), in particular at least one seal ring, is arranged, with which the guide hole (30) conducting the coolant is also sealed axially downward in this region.

Guide button (43) in journal (29)
In the shaft head area that does not overlap with the cylinder part (54),
At least one communication hole (36) is formed in the shape of a radially extending conduit. This is a guide button (
43) and adjacent to the flange (40). At least in this region there is at least one communication hole (36) within the guide hole (30) of the receiving part (11).

The inner wall surface of the guide hole (30) of the receiving portion (11), the guide bolt (41) of the journal (29), and the portion of the cylinder portion (54) of the guide bush (43) extending into the guide hole (30). A cylindrical space (30) formed between accommodates a spring (32) therein, and
It is formed as a compression space for the coolant. A compressed coolant is present in this compression space. Furthermore, this compressed space is formed by at least one communication hole (36) of the journal (29).
), and for example formed inside the receiving part (11),
It communicates with at least one radially extending coolant supply pipe (59) leading into the compressed coolant receiving part (11) and into the compression space (30). Obviously, the journal (2
The internal conduit (35) of 9) has at least one communication hole (
36), the guide bolt (41) of the journal (29) having a solid cross-section upwards from this position.

The journal (29) is located at the bottom (2) of the housing (12).
5), the packing plug (61) projects axially into the opening (24) and is formed with a coaxial through hole (61).
60). In the area of this packing plug (60) the tool mount (26) is connected and the conduit leading the coolant into said tool mount (26) is sealed under high pressure. In addition to this, the packkin stopper (60) includes a packkin (62),
For example, with at least one packing ring.

The coolant introduced in a compressed state through the coolant supply port (37) of the receiving part (11) and the coolant supply pipe (59) into the compression space (30) is transferred to the internal conduit (35) of the journal (29). and a through hole (61) of the packing plug (60) in the tool mounting part (26),
is guided in the axial direction through a guide hole passing through the center of the

Since the diameters of the bushings (56) and (57) are of the same size, the system existing in the compression space is in hydraulic equilibrium, and therefore the journal (29) and the guide bushing (43) When the pressure of the coolant under compression acts on these side wall surfaces, no additional axial forces are experienced.The system thus floats and is axially hydraulically compensated. Therefore, the pressure of the coolant has no negative effect on the functioning and smooth operation of the length compensation mechanism (31), especially during tensioning of the chuck, since the springs (32) and (33)
does not change the relative weight and damping properties. Therefore, the length compensation mechanism (
There is no need to strengthen the spring structure to compensate for the additional axial force exerted on 31). Thus, the quick-change chuck (10) consists of only a few components and is a slight modification of the structure of previously known quick-change chucks of this type. Therefore,
This quick exchange chuck (10) has a simple structure, is lightweight and compact, and can save working space. Nevertheless, the introduction of coolant inside
This is realized in a smoothly operating length compensation mechanism (31).

In the second embodiment of the present invention shown in FIG. 2, for components corresponding to those in the first embodiment described above, the numbers of the first embodiment plus 100 are used. , the explanation of the first embodiment will be cited to avoid repeating the explanation. At this time, only those parts that are necessary for understanding and are beyond the scope of the description of the first embodiment shown in FIG. 1 will be explained.

In contrast to the first embodiment, in the second embodiment shown in FIG. shaped flange (140)
The inner conduit (135) is formed on the axial side of the housing and communicates with the internal conduit (135).

Furthermore, the journal (129) has a communication hole (136).
At an axial distance from the ring-shaped flange (140
) is formed at least one communicating hole (136') having the shape of a radially extending conduit.

Furthermore, the communication hole (136') is connected to the journal (129).
(141) to an internal conduit (163) formed coaxially with the guide port (141).

Unlike the first embodiment, in the second embodiment, a cover spring (133) is formed between the guide bush (143) and the cylindrical portion (13B) of the journal (129).
An internal ring-shaped space (152) is formed as a compressed space in which the coolant is stored in a compressed state. The ring-shaped space (152) formed as a compression space is sealed at its upper end by a packing (164), in particular at least one packing ring. Patsukin (16
4) is arranged between the ring-shaped flange (140) and the cylinder portion (154) of the guide bush (143). Further, as in the first embodiment, the bushing (156) is connected to the guide bushing (143),
The journal (129) is arranged between the cylinder part (138) of the journal (129) and on the opposite side.
) and the bearing (142) of the receiving part (111). However, compared to the first example, Patsukin (
58) is not necessary in this case.

Through hole (136) of conduit (135) and conduit (163)
) and the through hole (136°) are both ring-shaped spaces (152°).
), and this area is further covered by the cylindrical part (154) of the guide bush (143). Furthermore, these through holes (136), (1
36'') are arranged axially on the opposite side of the ring-shaped flange (140), unlike in the first embodiment shown in FIG.

A second internal conduit (163) formed within the journal (129) extends into the interior of the guide bolt (141) to an end (165) of the journal (129) opposite the housing (112). ing. Furthermore, in this position said second internal conduit (163) connects the central space (130) of the receiving part (111) into which compressed coolant can be introduced.
). The second internal conduit (163)
It is not in direct communication with the internal conduit (135).

A ring-shaped flange (133) is exposed to the pressure of the coolant in the compression space (152) and supports the upper end of the spring (133).
The ring-shaped surface (166) of the journal (140)
29) in the upper center space (13) of the guide bolt (141).
0) has the same size as the ring-shaped end surface (167) that protrudes inward and causes a hydraulic action. The journal (129) is therefore in hydraulic equilibrium with its ring-shaped surfaces (166) and (167) both under the pressure of the coolant and as a result is axially compensated. Therefore, the receiving part (111) and the journal (
The compressed coolant guided through the center of the journal (129) and the guide bush (14) exerts pressure on the radial ring-shaped surface of the system.
3), no additional axial forces are exerted; the hydraulic compensation as described above prevents the generation of additional forces.

The quick exchange chuck (110) further has features that can be realized in the first embodiment. That is, in FIG. 1, as a result of the tool mounting portion (26) receiving pressure from the coolant, an axial force component is applied to the tool mounting portion (26).
and the housing (12), and the tool mounting part (2
6) is pressed downwards, and an additional force acting radially outwardly on said retaining means (28) on the ring-shaped groove supporting the retaining means (28) for axial retention. and the housing (12) is connected to the head (14).
This may impair smooth operation when moving in the axial direction. However, this works to the contrary in the case of the second embodiment due to the following formulation.

A cylindrical opening (1) formed in the housing (112)
24), there is a cylinder bushing (1) coaxial with this.
70) is held for relative movement. A device surface of the tool mounting portion (126) is formed on an end surface (171) of the cylinder bush (170) located on the opposite side to the journal (129). This end face (171)
is also subject to the pressure of the coolant guided therethrough. The axial range of movement of the cylinder bushing (170) is determined by a stopper, for example two ring-shaped Jl! formed at an axial distance on the retaining ring (172) and the cylinder bushing (170). F (173)
, (174) on both axial sides. The ring-shaped shoulders (173), (174) together with their outer peripheral surfaces form a guide surface. The guide surface has an opening (12
4) cooperates with the cylindrical inner wall surface.

As shown in FIG. 2, the cylinder bush (170) is subjected to a downward force by the spring (175), and is pressed against a stopper in the form of a retaining ring (172).
A ring-shaped! (173)
is pressed. The spring (175) is attached to the housing (112
) bottom (125) and cylinder bush (170)
, for example arranged axially between its inner flange (176) at a height of ring-shaped 1it (174).

A seal (177), in particular at least one seal ring, is arranged between the cylinder bush (170) and the cylindrical wall (123) of the housing (112) which guides it. Furthermore, cylinder bush (170)
is the end face (1) located on the opposite side to the journal (129).
71) has a packing (17B), in particular at least one packing ring. At this time, the caulking diameter (Abdichtungs) of the end surface (179) on the journal (129) side of the cylinder bush (170)
durchmesser) (d) is the opposite end face (170) of the cylinder bush (170).
It is important that the diameter is larger than the central coking diameter (d, ) in 1). As a result, the cylinder bush (
At the end face (179) of 170), due to the pressure of the coolant acting thereon, a force directed axially downward in FIG.
More precisely, the central caulking diameter (
d,) a small axial force exerted by the pressure of the coolant occurs upwards. Therefore, with this dimension setting, the housing (112
), which causes an axial force to act on the cylinder bushing (170), and this force causes the cylinder bushing (170), together with the packing (178), to be strongly pressed against the tool mounting part (126). , so that in this area a reliable seal is achieved and furthermore leakage of coolant can be prevented.

In a second embodiment, the coolant is guided in a compressed state into the space (130) of the shank (113) through a side pipe (180). This side pipe (180) extends obliquely and communicates with the outer peripheral surface of the receiving part (111), through which the coolant in a compressed state is introduced. On the left side of the center line in FIG. 2, the side tube (180) has an inclined tube (182) extending at an acute angle to the side tube (180) by means of a screw (181) coaxially attached thereto. The incline tube (182) is connected to the incline tube (182) so that the coolant can be introduced from the outside. The tapped hole into which the screw (181) is screwed extends outward beyond the intersection of the side pipe (180) and the inclined pipe (182) and further towards the inside of the side pipe (180). Therefore, the side tube (180) is closed off from the outside, i.e. the inclined tube (182), by screwing the screw (181) inward from said intersection and advancing it to the position shown on the right side of the center line in FIG. be able to. During this adjustment, the coolant is guided centrally into the shank (113) through a hole (130) formed coaxially therewith.

Another embodiment, not previously described, is that two conduits (135), (163) formed coaxially together are connected to an axially extending bore having, for example, a smaller diameter than each other. However, this is different from the embodiment shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a schematic axial longitudinal section showing a first embodiment of a quick-change chuck according to the invention, and FIG. 2 is a schematic axial longitudinal section showing a second embodiment of a quick-change chuck according to the invention. It is an axial longitudinal cross-sectional view. (11)-11 receiving part, (12)---housing,
(14L-one head, (16)-m-opening, (26)-
11 tool attachment part, (27)--1 tool, (29)-m-
Journal, (3OL-guide hole, (31)--length adjustment mechanism, (32), (33)-m-spring, (35)
)-11 internal conduit, (36)-- series of through holes, (40)-
--Ring-shaped flange,

Claims (30)

[Claims] (1) It has a receiving part (11; 111) which is attached to the machine spindle at one end and has a head (14; 114) at the other end, and the head (14; 114) has a cylindrical part coaxially therewith. An opening (16; 116) is formed, and said opening (16;
; 116), a housing (12; 112) is accommodated and guided in a non-rotatable but axially movable manner, and said housing (12; 112) has a tool (27; 127) for thread cutting etc. on one side. A tool mounting part (26; 126) that can be quickly replaced is fitted, and the other side is provided with a journal (29; 129) coaxial with the tool mounting part (26; 126), and the journal (
29; 129) is inserted into a guide hole (30; 130) coaxially formed in the receiving part (11; 111), and the housing (12; 1
When the housing (12) moves relative to the housing (12) in the axial direction, the housing (12) can also move relative to the housing (12) in the axial direction.
For thread cutting, etc., it has a length compensation mechanism (31; 131) for performing axial length compensation during relative movement along the axial direction of the journal (2; 112) and the journal (29; 129). A quick exchange chuck, wherein said journal (29; 129) has at least one internal conduit (35; 135, 163), said internal conduit (35; 135, 163) at least said journal (29; the housing (129) through a part of the housing (129);
2, 112) and said housing (12; 11
2), and at least one communication hole (36; 136, 136) formed in the journal (29; 129).
', 163) on the receiving part side coolant supply pipe (37,
59, 30; 180, 130).
The compressed coolant is connected to the journal (29; 129)
and a quick-change chuck, characterized in that it is guided through the housing (12; 112) to the tool mounting part (26; 126). (2) The journal (29; 129) is coaxially supported by a guide bush (43; 143) that is movable relative to the journal, and the guide bush (43; 143) is connected to the receiving portion (11; 111). The housing (12;
112) Rapid exchange chuck according to claim 1, characterized in that it is supported on. (3) The guide bush (43; 143) is arranged so that the guide bush (43; 143) is attached to the receiver (11;
1) and the guide bush (43; 143), the stopper (47) is movable to a certain position, and the stopper (47) furthermore controls at least the movement of the guide bush (43; 143). A quick-change chuck according to claim 2, characterized in that it limits axial movement in opposite directions. (4) between the guide bushing (43; 143) and the receiving part (11; 111), at least one of the guide bushings (43; 143) is provided with a A spring (32; 132) used for length compensation is arranged, said spring (3
2; 132) The quick exchange chuck according to claim 2 or 3, wherein one end of the chuck is supported on the receiving portion side and the other end is supported on the guide bush side. (5) Between the journal (29; 129) and the guide bush (43; 143), at least one
A spring (33; 133) is disposed surrounding the journal (29; 129) and used for length compensation against movement, e.g. tension, in the other axial direction, and one end of the spring (33; 133) is connected to the journal. The quick exchange chuck according to any one of claims 2 to 4, wherein the other end is supported on the guide bush side. (6) A second aspect characterized in that a ring-shaped space (52; 152) is formed between the guide bush (43; 143) and the journal (29, 38; 129, 138). A quick exchange chuck according to any one of claims 1 to 5. (7) The journal (29; 129) has a piston at a position axially spaced from the bottom (53; 153) of the guide bush (43; 143) penetrated by the journal (29; 129). The guide bush (43; 143) has a ring-shaped flange (40; 140) functioning as a ring-shaped flange (40; 140).
Cylinder part (54; 154) that guides the
The journal (29; 129) in the cylinder portion (54; 154) and the guide bush (
A ring-shaped internal space (52; 152) formed between the guide bush (43; 143) and the guide bush (43;
; 143) and, on the other hand, with the ring-shaped flange (40; 140) of said journal (29; 129). A quick exchange chuck according to any one of claims 1 to 6. (8) The guide bush (43; 143) extends in the axial direction, and the guide hole (3;
0; 130) having dimensions corresponding to the guide portion (44;
144) so that the guide bush (43; 143) is guided into the guide hole (30; 130). The quick exchange chuck according to item 1. (9) At least one spring (32; 132) surrounding the guide bush (43; 143)
4; 144) to a cylinder part with a smaller diameter (
9. A quick-change chuck according to claim 4, characterized in that it is supported on a shoulder (55; 155) which is the transition point to 54; 154). (10) A stopper consisting of a radial protrusion such as a bolt (
47) connects said receiving part (11) to at least one end face (49, 50) of an axial groove (48) formed in said guide bush (43), in particular in its guide part (44).
A quick-change chuck according to any one of claims 3 to 9, characterized in that the chuck is adapted to engage with the chuck. (11) The journal (29; 129) has a guide bolt (41; 141) coaxial with the guide bush (43; 143) in a region spaced apart from the guide bush (43; 143), and the guide bolt (41; 141) passes through a bearing (42; 142) formed coaxially with the receiving part (11; 111) and has a corresponding diameter, and is guided so as to be relatively movable within the bearing (42; 142). The quick exchange chuck according to any one of claims 2 to 10, characterized in that: (12) The journal (29, 38; 129, 138
) and the journal (29, 38;
129, 138) and an end adjoining the housing, a sealing (56; 156), in particular at least one sealing ring, is arranged between the sealing member (56; 156) and the end adjacent to the housing. Quick replacement chuck as described in . (13) The journal (29; 129), especially its guide bolt (41; 141), and the receiving part (11; 1)
11), the area remote from the housing, penetrated by said journal (29, 129), in particular its bearing (4
2; 142), a packing (57; 157), in particular at least one packing ring, is arranged between the
Quick change chuck as described in section. (14) The journal (29, 38; 129, 138
), the diameter of the area passing through the guide bush (43; 143), in particular its bottom (53; 153), of the journal (29; 129), in particular its guide bolt (41
; 141), in particular the diameter of the region passing through its bearing (42; 142).
Quick change chuck as described in section. (15) The packing (5) disposed between the receiving portion (11; 111) and the journal (29; 129)
7; 157), in particular the diameter of at least one packing ring (
56; 156), in particular the quick-change chuck according to any one of claims 12 to 14, characterized in that the diameter is the same as the diameter of at least one packing ring. (16) The guide bush (43), especially its outer guide part (44), and the receiving part (11) that accommodates it
, especially between the guide hole (30) and the packing (58).
), in particular at least one packing ring. (17) The journal (29) is located in a region close to the edge of the guide bush (43, 44) and spaced apart in the axial direction from the bearing (42) for the guide bolt (41). , having at least one radially extending communication hole (36), said communication hole (36) communicating with an internal conduit (35) of said journal (29),
The guide hole (30) in the receiving part (11), the journal (29) and the guide bush (43, 54)
) and a region extending into the guide hole (30) is formed as a compression space for the coolant, and one of the ring-shaped spaces (30) is
the at least one radial communication hole (36) of the journal (29) and the other formed in the at least one receptacle (11) for directing the compressed coolant to the receptacle. Any one of claims 2 to 16, characterized in that it is connected to a radially extending coolant supply pipe (59) for introducing the coolant into the pipe (11).
Quick change chuck as described in section. (18) The internal conduit (35) of the journal (29)
) is at least one radially extending communication hole (36)
18. Quick-change chuck according to claim 17, characterized in that the guide bolt (41) of the journal (29) has a solid cross section. (19) The at least one radial communication hole (36) of the journal (29) is opposite to the guide bush (43) with respect to the ring-shaped flange (40) of the journal (29) along the axial direction. According to any one of claims 1 to 18, the ring-shaped space (30) is connected to the ring-shaped space (30) in a region adjacent to the ring-shaped flange (40). Quick replacement chuck as described. (20) An internal space (1) formed between the journal (129, 138) and the guide bush (143)
17. Rapid exchange chuck according to claim 2, characterized in that 52) is formed as a compression space for the coolant. (21) A quick-change chuck according to claim 20, characterized in that a packing, in particular at least one packing ring, is arranged between the annular flange (140) and the guide bush (143). . (22) The journal (129) has at least one radial shape facing the guide bush (143) on the side adjacent to the ring-shaped flange (140) of the area surrounded by the guide bush (143). It has a communication hole (136) extending to the communication hole (136).
A quick-change chuck according to claim 20 or 21, characterized in that 6) communicates with the compression space (152). (23) said journal (129, 141) has a second coaxial internal conduit (163), said second internal conduit (
163) is an end (165) of the journal (129, 141) located on the opposite side of the housing (112).
), and extends toward the central space (
130) and in which said compressed coolant is guided and which communicates with at least one radial conduit (136') which communicates with a ring-shaped compression space (152), said second An internal conduit (163) is connected to the first
A quick-change chuck according to any one of claims 20 to 22, characterized in that it is separated from the internal conduit (135) of the chuck. (24) The ring-shaped flange (1) is subjected to the compressive force of the coolant in the ring-shaped compression space (152).
A ring-shaped end surface (167) whose area of the ring surface (166) of 40) acts hydraulically at the end (168) projecting into the central space (130) of the journal (129, 141). The quick exchange chuck according to any one of claims 20 to 23, characterized in that the area is the same as the area of the chuck. (25) The journal (29) has a packing plug (60
) in the housing (12) in the axial direction with an opening (2
4) The quick exchange chuck according to any one of claims 1 to 24, characterized in that the chuck extends inwardly. (26) A cylinder bush (170) coaxial therewith is housed inside the cylindrical opening (124) in the housing (112) so as to be movable relative to the cylinder bush (170), and the cylinder bush (170) is connected to the journal (129). The tool mounting portion (1) is located on the end surface (171) opposite to the
26), and is characterized in that the pressure of the coolant guided to the device surface is applied to the device surface.
A quick exchange chuck according to any one of claims 1 to 24. (27) The bidirectional movement trajectory along the axial direction of the cylinder bush (170) is arranged by the stoppers (172, 173).
, 174), and the cylinder bushing (170) is limited by the bottom (12) of the housing (112).
5) and the cylinder bushing (170), the cylinder bushing (170) is biased in the pushing direction by at least one spring (175).
A quick change chuck as claimed in the claims. (28) A packing, in particular at least one packing ring, is arranged between the cylinder bushing (170) and the cylindrical wall (123) of the housing (112) guided therein. A quick exchange chuck as claimed in claim or claim 27. (29) The cylinder bush (170) has an end surface (171) located on the opposite side to the journal (129).
29. Quick-change chuck according to claim 26, characterized in that the chuck has a packing, in particular at least one packing ring. (30) The caulking diameter (d) of the end surface (179) of the cylinder bushing (170) located on the journal (129) side is the same as the coking diameter (d) of the end surface of the cylinder bushing (170) located on the opposite side of the journal (129). (1
Any one of claims 26 to 29, characterized in that the diameter (d_i) of the coking is larger than the central coking diameter (d_i) of 71).
Quick change chuck as described in section.