CONICAL SHANK MOUNTING DEVICE, PARTICULARLY FOR 7 / 24" TONE, WITH CONE AND FACE APPLICATION FOR ATTACHMENTS, TOOL HOLDERS AND TOOLS

Abstract

The present invention relates to a tapered shank mounting device, in particular with a 7 / 24**e taper, for cone and face application for attachments, tool holders and tools, which essentially consists of an insertion cone 1 in the spindle 2, a front part 3 centered in the cone 1 and provided with a flange 4 for application against the face of the spindle 2, a pull tab 5 for assembling the cone 1 and the front part 3, and an elastic assembly 6 for pressing the cone 1 into the spindle 2 in the locked position, mounted in compression between said cone 1 and the front part 3 and which is provided with an elastically deformable means 7 for forcefully applying the front part 3 into the cone 1, in the locked position, which is characterized in that the elastically deformable means 7 for forcefully applying the front part 3 into the cone 1, in the locked position,is advantageously constituted in the form of a hydraulic device with adjustable pressure comprising a deformable wall 59 at the connection between the tail 9 of the front part 3 and the bore 10 of the cone 1.

Description

*1 2641996 Conical shank mounting device, in particular with a 7 / 24th taper, for cone and face application for attachments, tool holders and tools. The main patent relates to a conical shank mounting device, in particular with a 7 / 24th taper, for cone and face application for attachments, tool holders and tools, which are essentially made up of... killed by an introduction cone into the spindle, by a front part centered in the cone and equipped with a col- application plate against the face of the spindle, by means of a pull tab for assembling the cone and the front part, and by an elastic pressure assembly for the cone in the spindle in the locked position, mounted in compression between said cone and the front part, and which is provided with an elastically deformable means applying the part before forcing it into the cone, in the locking position. This application for a certificate of addition concerns an alternative implementation of the device object of the invention. In accordance with a characteristic of the invention tion, the elastically deformable means applying the front part by force in the cone, in the position of rusting, is advantageously constituted in the form of a hydraulic device with adjustable pressure having a deformable wall at the connection between the tail of the front part and the bore of the cone. The invention will be better understood, thanks to the the following description, which relates to modes of favorite achievements, given as non-exhaustive examples figurative, and explained with reference to the diagram- attached illustration, wherein: Figure 1 is a lateral elevation and cross-sectional view of a device according to the invention, and Figure 2 is a view similar to that of the figure 1 of an alternative embodiment of the invention. In accordance with the invention and as shown more particularly, by way of example, in Figure 1 of the accompanying drawing, the tapered shank mounting device, in particular with a 7 / 24th taper, with taper and face application for attachments, tool holders and tools, which essentially consists of an insertion cone 1 into the spindle 2, and a front part 3 centered in the cone 1 and provided with the application collar 4 con- the face of the spindle 2, by means of a pull tab 5 of assembly plating of cone 1 and front part 3, and by an en- seems elastic 6 of pressure of the cone 1 in the spindle 2 in the locked position, mounted in compression in- between said cone 1 and the front part 3 and which is provided of a means 7 elastically deformable applying the par- tie before 3 by force in cone 1, in the position of ver- rusting, is characterized in that the average 7 elastic- deformable moment applying the front part 3 to force in cone 1, in the locked position, is advanced aggressively constructed in the form of a hydraulic device adjustable pressure lique comprising a 59 deformable wall mable at the level of the connection between tail 9 of the front part 3 and bore 10 of cone 1. The adjustable pressure hydraulic device forming the elastically deformable means 7 is advantageous- consisting of a sealed annular chamber 60 delimited, around the tail 9, by the deformable wall 59 and connected by a channel 61 to a chamber watertight 62 in which is mounted, in a displaceable manner- ble, against the action of an adjusting screw 63, a piston 64 provided with a sealing gasket 65. The deformable wall 59 is preferably in the form of a thin ring crimped at its ends to ends of the annular chamber 60 or delimiting this- the chamber by interposing sealing joints. When the mounting device is inserted into spindle 2 of the machine, cone 1 rests in cone 11 of spindle 2 and, during the movement carried out under the action of the machine clamp on the pull rod 5-3 and the corresponding displacement, in the direction of the arrow- che b, of the front part 3, face 12 of this last- The bearing rests on face 13 of spindle 2 of the machine. Simultaneously with this movement of the front part 3, a force is exerted on the cone 1 via the elastic pressure assembly 6, formed by a stack of Belleville washers or by an au- elastic means, so that said cone is applied further against the cone 11 of the spindle 2. In order to eliminate any play between the shank 9 and the cone 1, the screw 63 is then actuated in the direction of compression of the hydraulic fluid contained in the chamber 62 by the piston 64 fitted with its sealing gasket 65. Such actuation has the effect of expelling the hydraulic fluid lique towards the annular chamber 60 and to cause a deformation of the wall 59 resulting in a forced application of the latter against the wall of the bore 10 of the cone 1 and thus an extremely powerful clamping of the tail 9 in said bore 10. Figure 2 of the accompanying drawing shows an alternative embodiment of the invention, in which the elastic pressure assembly 6 of the cone 1 in the spindle 2 in the locked position is provided with an adjustment device 14 cooperating with a short pull 5' for assembling the cone 1 and the front part 3, said pull tab 5' being screwed into cone 1 and blocked pressed against its rear face. The adjustment device 14 consists of a nut 15 tightening the elastic assembly 6, in a sage 16 of the tail 9 of the front part 3, against the head of a screw 17, provided at its two ends with a a hex key for operation, which cooperates with a tap- the short pull tab 5', and by a lock nut 18 bearing against said screw 17 and also provided with a hexagonal socket for operation, the screw 17 and the locknut 18 which may also be fitted with a per- axial sizing for lubrication fluid passage. In this embodiment, the hy- device draulic is represented in the same configuration as in the embodiment shown in Figure 1. However- According to one feature of the invention, the hydraulic device can also be actuation by means of a piston connected to the screw 17 and compressing the hydraulic fluid in the chamber 62 at the end of the clamping stroke of the cone 1 of the front part 3 in cone 11 of spindle 2. In such a case, the pis- Room 64 and room 62 would be advantageously accommodated. in the set 6. After the mounting device is inserted into the machine spindle 2 and the faces 12 and 13 are mutually supported, the machine clamping mechanism applies force to the pull rod 5' in the direction of arrow b. The cone 1 is then driven and forcefully pressed against the wall of the cone 11 on the spindle 2. During this clamping action, the screw 17, driven by the pull rod 5', and therefore the piston connected to said screw 17, moves by so that a compression of the hy- liquid is carried out draulic in chamber 62, which leads to pressurization of the liquid in the annular chamber 60 and a deformation of wall 59 resulting in a ser- tail rage 9 in bore 10. According to an alternative embodiment of the invention, not shown in the accompanying drawings, the A 60mm sealed annular chamber can also be made seated in the bore 10 of the cone 1, the deformable wall 59 delimiting this chamber 60 at the level of contact with the tail 9 of the front part 3, the pressurization of the liquid contained in chamber 60 being carried out ma- manually by means of a piston operated by a screw or cam, or automatically by means of a piston operated by the pull handle 5 or 5' or by another means of operation- located in cone 1 or in part 3. Pressurizing the sealed annular chamber 60 results in an expansion or deformation of the wall 59 until the application by force of the latter- re against the wall of the bore lO or of the tail 9. Thanks to the invention, it is possible to realize- to tighten extremely effectively the tail 9 of the front part 3 in bore 10 of cone 1 of a device Conical tail mounting device, by swelling and expansion of the material. Furthermore, the embodiment conforming to the invention allows obtaining a precise sion in concentricity tolerances of very high quality. Of course, the invention is not limited to method of embodiment described and represented in drawing anne- Modifications remain possible, particularly regarding the composition of the various elements or through the substitution of technical equivalents, without going out of style. however, within the scope of protection of the invention. REVEND IC AT I ONS 1. A tapered shank mounting device, in particular with a 7 / 24th taper, for taper and face application for attachments, tool holders and tools, according to claim 1 of the main patent, characterized in that the elastically deformable means (7) for applying the front part (3) by force into the cone (1), in the locked position, is advantageously constituted as a hydraulic device with adjustable pressure comprising a deformable wall (59) at the connection between the shank (9) of the front part (3) and the bore (10) of the cone (1). 2. Device, according to claim 1, ca- characterized in that the hydraulic device with adjustable pressure forming the elastically deformable means (7) is advantageously constituted by a sealed annular chamber (60) delimited, on the periphery of the tail (9), by the deformable wall (59) and connected by a channel (61) to a sealed chamber (62) in which is mounted, in a movable manner, against the action of an adjusting screw (63), a piston (64) provided with a sealing packing (65). 3. Device, according to claim 2, ca- characterized in that the deformable wall (59) is preferably in the form of a thin ring crimped at its ends to the ends of the annular chamber (60) or delimiting this chamber by means of sealing gaskets. 4. Device, according to any one of the claims 4 and 5 of the main patent and following the claim 2, characterized in that the hydraulic device is actuation achieved by means of a piston connected to the screw (17) and compressing the hydraulic fluid in the chamber (62) at the end of the cone's clamping stroke (1) of the front part (3) in the cone (11) of the bro- che (2), the piston (64) and the chamber (62) being advantageous ugly housed in the whole (6). 5. Device, according to any one of the claims 1 to 4, characterized in that the chamber The sealed annular chamber (60) is formed in the bore (10) of the cone (1), the deformable wall (59) delimiting this chamber (60) at the point of contact with the tail (9) of the front part (3), the pressurization of the liquid content in chamber (.60) being carried out manually- operated by means of a piston actuated by a screw or cam, or automatically by means of a piston actuated by the pull handle, or by another actuation means housed in the cone (1) or in the part (3).

Claims

1. Conical shank mounting device, in particular with a 7 / 24 cone <e>, with cone and face application for attachments, tool holders and tools, essentially consisting of an introduction cone (1) in the spindle (2), a front part (3) centered in the cone (1) and provided with a collar (4) for application against the face of the spindle (2), a pull tab (5) for assembling the cone (1) and the front part (3) and an elastic assembly (6) for pressing the cone (1) in the spindle (2) in the locking position, mounted in compression between said cone (1) and the front part (3), characterized in that it is provided with an elastically deformable means (7) for applying the front part (3) by force in the cone (1), in the locking position.

2. Device, according to claim 1, characterized in that the elastically deformable means (7) advantageously takes the form of portions of a cone (8) delimited by slits (8′) extending longitudinally and at equidistance on the circumference of the cone (1).

3. Device, according to claim 2, characterized in that the slots (8′) are advantageously filled by an elastically deformable compressible material.

4. Device, according to claim 1, characterized in that the elastic assembly (6) of pressure of the cone (1) in the spindle (2) in the locking position is provided with an adjustment device (14) cooperating with a short pull (5′) of assembly of the cone (1) and the front part (3), said pull (5′) being screwed into the cone (1) and locked against its rear face.

5. Device, according to claim 4, characterized in that the adjustment device (14) consists of a nut (15) clamping the elastic assembly (6), in a bore (16) of the tail (9) of the front part (3), against the head of a screw (17), provided at its two ends with a hex socket for operation, which cooperates with a thread in the short pull (5′), and by a locknut (18) bearing against said screw (17) and also provided with a hex socket for operation, the screw (17) and the locknut (18) being able to be further provided with an axial bore for the passage of lubrication fluid.

6. Device according to claim 5, characterized in that the lock nut (18) can be replaced by an anti-loosening device provided in the threads of the tapping of the pull tab (5′).

7. Device, according to claim 1, characterized in that the elastically deformable means (7) is constituted in the form of a ball cage (20) mounted with pre-stress in the bore (10) of the cone (1) and on the tail (9) of the front part (3).

8. Device, according to claim 7, characterized in that the cone (1) is advantageously provided, on the depth of the bore (10), with at least one longitudinal slot, the ball cage (20) being arranged or made, in a known manner, such that no ball enters the slot or slots.

9. Device, according to any one of claims 4, 5 and 7, characterized in that the backlash-free assembly between the tail (9) of the front part (3) and the cone (1) is achieved, on the one hand, by means of a ball cage (20) housed in the cone (1) with preload, said cone (1) being able to be provided with at least one longitudinal slot at the level of the bore (10) and, on the other hand, by means of a device (14) for adjusting the elastic assembly (6).

10. Device, according to claim 1, characterized in that the elastically deformable means (7) consists of a conical split ring (21), interposed between a conical tail (9′) of the front part (3) and the bore (10) of the cone (1), bearing in the bottom of the bore (10) on an elastic pressure assembly (6) and retained in said bore (10), against the action of the assembly (6), by an elastic ring (22), the assembly between the front part (3) and the cone (1) being made by a pull tab (5).

11. Device, according to claim 10, characterized in that the conical split ring (21) is provided on its periphery, at regular intervals, with slots (23, 24) opened alternately on the upper and lower faces and a through slot (25).

12. Device, according to claim 1, characterized in that the elastically deformable means (7) consists of two parts (26) in the form of points, balls, or other, arranged in a housing extending diametrically in the tail (9) of the front part (3) and loaded by the elastic assembly (6), these parts (26) cooperating, in the assembly position of the front part (3) and the cone (1), with a housing (27) of corresponding or substantially corresponding section, extending over all or part of the wall of the bore (10) of the cone (1) along a circular generatrix, this housing (27) being connected to the upper face of the cone (1) by means of two diametrically opposed longitudinal openings for the passage of the parts (26), offset with respect to the service position of said parts (26), the pull tab (5) being simply screwed into the cone (1) and bearing against its rear face.

13. Device, according to claim 12, characterized in that the parts (26) are each provided with a stop (28) guided in a groove (29) of the tail (9).

14. Device, according to claim 12, characterized in that the elastic assembly (6), on which the parts (26) forming the means (7) are supported, is made of a compressible material such as rubber, or similar, disposed in an axial housing of the tail (9) of the front part (3) and whose compression is adjustable by means of a plug (30).

15. Device, according to claim 1, characterized in that the elastically deformable means (7) consists of several radially movable parts (31), uniformly distributed over the circumference of the tail (9), cooperating with a peripheral groove (34) and actuated by a central frustoconical pusher (32) loaded by the elastic pressure assembly (6), the clamping pressure of which is adjusted by means of a nut (33), said pusher (32) being provided with a hollow guide shaft (35) at its ends in the front part (3) and in the pull tab (5) screwed into the rear end of the cone (1), with interposition of sealing O-rings (36).

16. Device, according to claim 15, characterized in that the hollow shaft (35) of the pusher (32) is provided, at its end guided in the pull (5), with a thread (37), and the front part (3) is provided with an axial thread (38), in which is mounted a hexagonal operating nut (39).

17. Device according to any one of claims 15 and 16, characterized in that the moving parts (31) are advantageously loaded by return springs applying them against the pusher (32).

18. Device, according to any one of claims 15 to 17, characterized in that movable parts (31), loaded by return springs, are housed with the possibility of radial displacement in the tail (9) of the front part (3) against the action of a conical pusher (32′), screwed at its end into the pull (5) and able to be locked in the latter by means of a nut (40), said pull (5) being mounted to slide in the rear part of the cone (1), the tail (9) of the front part (3) bearing at the bottom of the bore (10) of the cone (1) on the elastic assembly (6) and said movable parts (31) passing through corresponding clearances of the cone (1) and cooperating with a circular groove (34′) or circular housings provided in the spindle (2).

19. Device, according to claim 18, characterized in that the tail (9) of the front part (3) is advantageously stepped and has, at the level of the guidance of the moving parts (31), a part of larger diameter (9′).

20. Device, according to claim 18, characterized in that the end of the conical pusher (32′), screwed into the pull (5), as well as the nut (40) are provided with a hollow hexagonal slewing ring for operation intended to allow adjustment of the position of the pusher (32′) relative to the pull (5) and locking in position by means of a tool introduced through the central bore of said pull (5).

21. Device, according to claim 18, characterized in that the movable parts (31), loaded by return springs, are housed in a radially movable manner in the tails (9) of the front part (3) against the action of a frustoconical pusher (32̋) bearing on the elastic assembly (6), the pressure of which is adjustable by means of a through-hexagonal socket nut (51), the frustoconical pusher (32̋) being able to be moved against the action of the assembly (6), in the direction of a retraction of the parts (31), by means of a screw-nut (52) housed in the front part (3) and the rear face (12) of the front part (3) is provided with a device (53) for locking the positioning of said front part (3) relative to the cone (1).

22. Device, according to claim 21, characterized in that the locking device (53) consists of a pin or pin (54), which is mounted against the action of a return spring (55) in a corresponding housing of the front part (3) and held in this housing by means of an elastic ring, and which cooperates with a housing (56), provided in the front face of the cone (1) and having an inclined slope (57) for the release of the pin (54) during disassembly, a hole (58) being provided, in addition, radially under the housing (56).

23. Device, according to claim 21, characterized in that the front part (3), the pull tab (5), the truncated conical pusher (32 ̋), the elastic assembly (6) and the screw-nut (52) are advantageously provided with an axial bore allowing access to the hex socket for operating the nut (51).

24. Device, according to claim 1, characterized in that the elastically deformable means (7) applying the front part (3) by force in the cone (1), in the locked position, is advantageously made in the form of a right-angle drive force transmission device consisting of wedge locks (42) housed in recesses in the collar (4) and cooperating in the service position with correspondingly inclined faces of the drive pins (43) of the spindle (2) of the machine, said locks (42) being returned to the rest position by springs (44), by force transmission balls (45) bearing on the rear face of the locks (42) and by pushers (46), having an inclined end bearing the corresponding ball (45),guided in the tail (9) of the front part (3) by means of a lug (47) sliding in a corresponding groove 48 and bearing via a washer (49) on the elastic pressure assembly (6), the assembly between the front part (3) and the cone (1) being achieved by means of a pull tab (5) whose position is adjustable and can be locked by a nut (50).

25. Device according to any one of claims 1, 4, 5, 9, 10, 12, 14, 15, 18, 21, 23 and 24, characterized in that the elastic assembly (6) can advantageously be constituted in the form of a compressible block of rubber, or other synthetic material, in the form of one or more springs, in the form of a hydraulic or pneumatic compression device or in the form of a compressible powder.

26. Device, according to claim 1, characterized in that the elastically deformable means (7) applying the front part (3) by force in the cone (1), in the locking position, is advantageously constituted in the form of a hydraulic device with adjustable pressure comprising a deformable wall (59) at the connection between the tail (9) of the front part (3) and the bore (10) of the cone (1).

27. Device, according to claim 26, characterized in that the hydraulic device with adjustable pressure forming the elastically deformable means (7) is advantageously constituted by a sealed annular chamber (60) delimited, on the periphery of the tail (9), by the deformable wall (59) and connected by a channel (61) to a sealed chamber (62), in which is mounted, in a movable manner, against the action of an adjusting screw (63), a piston (64) provided with a sealing packing (65).

28. Device, according to claim 27, characterized in that the deformable wall (59) is preferably in the form of a thin ring set at its ends at the ends of the annular chamber (60) or delimiting this chamber by interposition of sealing joints.

29. Device, according to any one of claims 4, 5 and 27, characterized in that the actuation of the hydraulic device is achieved by means of a piston connected to the screw (17) and compressing the hydraulic fluid in the chamber (62) at the end of the clamping stroke of the cone (1) of the front part (3) in the cone (11) of the spindle (2), the piston (64) and the chamber (62) being advantageously housed in the assembly (6).

30. Device, according to any one of claims 26 to 29, characterized in that the sealed annular chamber (60) is made in the bore (10) of the cone (1), the deformable wall (59) delimiting this chamber (60) at the level of contact with the tail (9) of the front part (3), the pressurization of the liquid contained in the chamber (60) being carried out manually by means of a piston actuated by screw or by cam or automatically by means of a piston actuated by the pull rod, or by another actuation means housed in the cone (1) or in the part (3).< / e>