CN112207308A

CN112207308A - Machining center presss from both sides core device

Info

Publication number: CN112207308A
Application number: CN202011051613.XA
Authority: CN
Inventors: 牟胜辉; 胡真清; 黄日恒; 段家海
Original assignee: Qiaofeng Intelligent Equipment Co ltd
Current assignee: Qiaofeng Intelligent Equipment Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-01-12
Anticipated expiration: 2040-09-29
Also published as: CN112207308B

Abstract

The invention belongs to the technical field of sandwich devices, and particularly relates to a sandwich device for machining a center, which comprises a tool shank, a jacket and a spring chuck, wherein when an elastic chuck with an abraded inner hole and a tool which is smaller than the elastic chuck are installed, the jacket is driven by a threaded sleeve to move to the position on the jacket, so that an upper conical surface on the elastic chuck is contacted with a conical surface of an inverted cone groove on the tool shank, and the elastic chuck can compress to a greater extent in the process of continuing rotating the jacket, so that the jacket moves upwards to a greater extent in the process, the jacket can enable a connecting rod to be in relation with a second inclined surface, the limit of a limit ring is released, and the; when the tension of the first spring is released, the rotating force of the rotating jacket of a user is suddenly reduced, and after the force is sensed to be reduced, people can realize that the cutter is possibly worn or not installed, and then the rotating jacket can be stopped; the damage to the elastic chuck caused by continuously rotating the jacket can be prevented to a certain extent.

Description

Machining center presss from both sides core device

Technical Field

The invention belongs to the technical field of sandwich devices, and particularly relates to a sandwich device of a machining center.

Background

The spring chuck is a cylindrical fixture installed on milling machine for fastening drill bit or milling cutter.

In the process of using the standard elastic chuck, the cutter handle and the cutter, the cutter can be clamped by the elastic chuck after the elastic chuck, the cutter handle and the cutter are installed according to the standard specification; however, it is inevitable to mount the collet with a relatively small tool or to clamp the tool when not in use, in both cases, if the collet is forcibly clamped, there is a possibility that the collet will plastically deform, causing damage to the resilient clamp.

In addition, during use, the tool is not clamped in the presence of sufficient clamping force due to wear inside the collet and mismatch between the collet and the tool, which has the two consequences that the first collet is subjected to the clamping force by its own transient deformation or even plastic deformation, causing damage to the collet and, secondly, expensive tool damage directly during machining.

The invention designs a sandwich device for a machining center to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses a machining center sandwich device which is realized by adopting the following technical scheme.

The tool shank designed in the invention is the same as the tool shank used by the existing machining center for clamping a drill bit or a milling cutter, the upper ends of the tool shanks are provided with blind rivets, and the outer circular surfaces of the bulges are provided with driving key grooves which are uniformly distributed in the circumferential direction; the tool shank is arranged on the main shaft through a blind rivet and a driving key groove; the inner side of the lower end of the knife handle is provided with an inverted cone groove matched with the conical surface of the elastic chuck. The elastic chuck designed by the invention is the same as the elastic chuck used by the existing machining center, the upper end of the elastic chuck is provided with an upper conical surface, and the lower end of the elastic chuck is provided with a lower conical surface; the upper conical surface is matched with the conical surface of the inverted cone groove on the knife handle. The inner circular surface of the lower end of the clamping sleeve designed by the invention is provided with a tightening conical surface, the tightening conical surface is the same as the tightening conical surface of the lower end of the clamping sleeve used in the existing machining center, and the elastic clamping head is tightened by matching the tightening conical surface with the conical surface of the lower conical surface of the elastic clamping head.

A sandwich device for a machining center comprises a tool shank, a jacket and a spring chuck, wherein the tool shank is arranged on a main shaft of a machine tool through a driving key slot and a blind rivet on the tool shank; the spring chuck is arranged on the knife handle in a threaded fit way through the jacket and the knife handle, and the upper end of the cutter is nested in the spring chuck; the method is characterized in that: the inner circular surface at the upper end of the clamping sleeve is a smooth surface, and a threaded sleeve is arranged on the inner circular surface through the up-down sliding fit of the guide sliding block and the guide sliding chute; the transmission ring is arranged on the inner side of the upper end of the clamping sleeve in a vertically sliding manner and is fixedly connected with the threaded sleeve; the limiting ring is arranged on the inner side of the jacket in a sliding manner and is positioned on the lower side of the transmission ring; a first spring is arranged between the upper end surface of the limiting ring and the lower end surface of the transmission ring; a second spring is arranged between the lower end surface of the limiting ring and the jacket.

The lower end of the jacket is circumferentially and uniformly provided with three limiting mechanisms which play a limiting role in limiting the limiting ring.

When a standard elastic chuck matched with the tool handle and the jacket and a corresponding matched tool are installed, the position a of the jacket relative to the tool handle can not release the limiting effect of the limiting mechanism on the limiting ring after the tool is tightened by rotating the jacket.

When the elastic chuck with the worn inner hole and the cutter smaller than the elastic chuck are installed, the position b of the clamping sleeve relative to the cutter handle is larger than a in the process of tightening the cutter by rotating the clamping sleeve, and meanwhile, the limiting effect of the limiting mechanism on the limiting ring can be relieved.

As a further improvement of the technology, the inner side of the upper end of the jacket is provided with an installation chute, the lower side of the installation chute is provided with a spring installation groove, and a limiting step surface for limiting the downward movement of the limiting ring is formed between the spring installation groove and the installation chute.

The transmission ring and the limiting ring are vertically and slidably mounted in the mounting chute, the first spring is located in the mounting chute, the upper end of the second spring is fixedly mounted on the lower end face of the limiting ring, and the lower end of the second spring is fixedly mounted on the bottom face of the spring mounting groove.

As a further improvement of the technology, three guide sliding chutes are uniformly arranged on the inner circular surface at the upper end of the jacket in the circumferential direction, and three guide sliding blocks are uniformly arranged on the outer circular surface of the threaded sleeve in the circumferential direction; the thread bush is arranged on the clamping sleeve through the sliding fit of the three guide sliding blocks and the three guide sliding grooves.

As a further improvement of the technology, the inner end surfaces of the upper ends of the three guide chutes are respectively provided with a connecting chute communicated with the mounting chute; the transmission ring is fixedly connected with the threaded sleeve through three connecting sliding blocks which are uniformly distributed in the circumferential direction, and the three connecting sliding blocks are in one-to-one corresponding sliding fit with the three connecting sliding grooves.

As a further improvement of the present technology, the first spring is an extension spring and has a pretension force; the second spring is an extension spring and has a pretension.

As a further improvement of the technology, three limiting sliding grooves are uniformly formed in the circumferential direction on the inner circular surface of the jacket, and three sliding mounting grooves are uniformly formed in the circumferential direction on the inner circular surface of the limiting ring; one side of each of the three sliding installation grooves is provided with a square groove, and one side of each of the three square grooves is provided with an avoidance square groove; the other side of the three square grooves is provided with a limiting clamping groove; the three limiting mechanisms are correspondingly arranged in a limiting sliding groove, a sliding mounting groove, a square groove, a limiting clamping groove and an avoiding square groove which are formed in the jacket and the limiting ring.

The outer circular surface of the lower end of the knife handle is provided with a second inclined surface.

The limiting mechanism comprises a connecting rod, a clip-shaped limiting rod and a third spring, wherein the clip-shaped limiting rod is fixedly arranged at one end of the connecting rod and is slidably arranged in a corresponding limiting sliding groove formed in the jacket and a corresponding sliding installation groove formed in the limiting ring; one end of the clip-shaped limiting rod, which is far away from the connecting rod, is matched with a corresponding square groove and a limiting clamping groove which are formed on the limiting ring; and a third spring is arranged between one end of the clip-shaped limiting rod far away from the connecting rod and the mounting chute arranged on the jacket, and the third spring penetrates through the corresponding avoiding square groove.

One end of the connecting rod, which is far away from the clip-shaped limiting rod, is matched with the second inclined plane at the lower end of the knife handle.

As a further improvement of the technology, the circular surface of the mounting chute formed in the clamping sleeve, which is far away from the center of the clamping sleeve, is circumferentially and uniformly provided with three round holes, one side of each round hole is provided with a rack mounting groove, one side of each rack mounting groove is provided with a gear mounting groove, and one side of each gear mounting groove, which is close to the center of the clamping sleeve, is provided with a gear ring mounting groove.

One end of each of the three limiting mechanisms, far away from the connecting rod, of each of the double-shaped limiting rods is fixedly provided with a circular rod, one end of each of the three circular rods, far away from the corresponding double-shaped limiting rod, penetrates through three circular holes and is located in three rack mounting grooves, three racks are mounted at one ends, located in the rack mounting grooves, of the three circular rods respectively, three gears are rotatably mounted in the three gear mounting grooves, and the three gears and the three racks are correspondingly meshed with each other one by one; the ring gear is installed in the ring gear mounting groove, and the ring gear meshes with three gear.

As a further improvement of the technology, the lower end face of the jacket is provided with a mounting ring groove, and the inner end face of the mounting ring groove is circumferentially and uniformly provided with three through square sliding grooves.

One end of the connecting rod, which is far away from the return limiting rod, is hinged with a swing rod, and the lower end of the limiting rod is provided with a limiting plate which swings downwards relative to the swing plate; a plate spring is arranged between the limiting rod and the connecting rod.

The three square sliding grooves are internally provided with a trigger rod respectively, the trigger rings are arranged in the mounting ring grooves in a sliding manner, and the trigger rings are fixedly connected with the lower ends of the three trigger rods; the upper ends of the three trigger rods are respectively matched with swing rods arranged on three connecting rods in the three limiting mechanisms.

As a further improvement of the technology, the upper sides of the three swing rods far away from one end of the corresponding connecting rod are respectively provided with a first inclined plane; the upper sides of the three limiting sliding grooves on the jacket are respectively provided with an avoiding groove for avoiding the corresponding swing rod.

As a further improvement of the present technology, the third spring is a compression spring and has a pre-pressure.

Compared with the traditional sandwich device technology, the sandwich device has the following beneficial effects:

1. when the standard elastic chuck matched with the tool handle and the jacket and the corresponding matched tool are installed, after the jacket drives the elastic chuck to move upwards to the upper conical surface on the elastic chuck to be contacted with the conical surface of the inverted cone groove on the tool handle, the jacket is continuously rotated, so that the jacket drives the threaded sleeve to continuously rotate relative to the tool handle, and the threaded sleeve continuously rotates and continuously moves upwards relative to the tool handle. However, the upper conical surface of the elastic chuck is in a conical surface contact state with the inverted conical groove on the cutter handle, and cannot move upwards continuously, the elastic chuck is matched with the cutter, and the compressible amount of the elastic chuck is limited, so that the upward movement amount of the jacket is limited in the process, the jacket cannot enable the connecting rod to be in relation with the second inclined surface, and the limiting ring is limited by the limiting mechanism and cannot move upwards; therefore, at the moment, the screw sleeve moves upwards to drive the transmission ring to move upwards relative to the jacket, and the transmission ring moves upwards to stretch the first spring; the first spring is pulled to transmit pulling force to the clamping sleeve through the limiting mechanism and the second spring, so that the tightening force of the clamping sleeve between the elastic clamping head and the tool handle is increased; namely, the stability of the cutter arranged in the elastic chuck in the using process is improved.

2. When the elastic chuck with the worn inner hole and the cutter smaller than the elastic chuck are installed, the elastic chuck can be compressed to a greater degree in the process of continuously rotating the jacket after the threaded sleeve drives the jacket to move to contact the upper conical surface on the elastic chuck with the conical surface of the inverted cone groove on the cutter handle, so that the jacket can move upwards to a greater degree in the process, the jacket can enable the connecting rod to be in relation with the second inclined surface, the limit on the limiting ring is released, and the limiting ring can move upwards; when the tension of the first spring is released, the rotating force of the rotating jacket of a user is suddenly reduced, and after the force is sensed to be reduced, people can realize that the cutter is possibly worn or not installed, and then the rotating jacket can be stopped; the damage to the elastic chuck caused by continuously rotating the jacket can be prevented to a certain extent.

3. When the spring chuck and the jacket of a factory are used, when cutters with specification and size are installed and the cutters are not worn, the matching point of the connecting rod and the second inclined surface at the lower end of the cutter handle is determined, and the limiting ring cannot be relieved from limiting under the condition of ensuring the clamping of the cutters; if the elastic chuck of other manufacturers is used in the using process, although the elastic chuck is of one model, the elastic chuck and the elastic chuck have errors, so that the deviation of the matching point of the connecting rod and the second inclined plane at the lower end of the tool shank can be caused, and when the elastic chuck is slightly smaller, the situation that the limiting ring is relieved from limiting before the tool is clamped can occur, and the tool cannot be clamped; in order to solve the problem, the invention designs the trigger rod, the front end of the connecting rod is designed into a swingable structure, the swing rod at the front end of the connecting rod is swung to be straight through the trigger rod, so that the connecting rod cannot be contacted with the second inclined surface at the lower end of the tool holder in the process of continuously driving the elastic chuck to tighten by the jacket, namely, the limiting ring cannot be triggered, and the elastic chuck can be smoothly clamped.

4. According to the invention, the three connecting rods are kept synchronous in sliding through the designed gear and gear ring, so that the phenomenon that one connecting rod is clamped by a shell is prevented, and the judgment on whether the elastic chuck is clamped or not is influenced.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

FIG. 3 is a schematic view of a tool shank configuration.

Fig. 4 is a schematic view of the collet configuration.

Fig. 5 is a schematic view of the jacket appearance.

Fig. 6 is a schematic view of the internal structure of the jacket.

Fig. 7 is a schematic view of the mounting of the spacing structure.

Fig. 8 is a schematic diagram of the jacket structure.

Fig. 9 is a schematic view of the spacing runner and gear mounting slot distribution.

Fig. 10 is a schematic view of the first and second spring installations.

FIG. 11 is a schematic view of the drive ring and threaded sleeve connection.

FIG. 12 is a schematic view of a stop collar.

Figure 13 is a schematic view of the stop mechanism, ring gear, gears, trip bar and trip ring installation.

Fig. 14 is a schematic structural view of the limiting mechanism.

Number designation in the figures: 1. a knife handle; 2. a jacket; 3. a cutter; 4. a collet chuck; 5. pulling nails; 6. a drive keyway; 7. a reverse taper groove; 8. an upper conical surface; 9. a threaded sleeve; 10. a drive ring; 11. a first spring; 12. a limiting ring; 13. a second spring; 14. a trigger lever; 15. a limiting mechanism; 16. a gear; 17. a ring gear; 18. an avoidance groove; 19. connecting the sliding chute; 20. installing a chute; 21. a guide chute; 22. a limiting step surface; 23. a spring mounting groove; 24. a square chute; 25. tightening the conical surface; 26. mounting a ring groove; 27. a rack mounting groove; 28. a limiting chute; 29. a gear mounting groove; 30. a gear ring mounting groove; 31. a circular hole; 32. connecting the sliding block; 33. a guide slider; 34. a sliding mounting groove; 35. a limiting clamping groove; 36. a square groove; 37. avoiding a square groove; 38. a trigger ring; 39. a swing rod; 40. a first inclined plane; 41. a limiting plate; 42. a plate spring; 43. a connecting rod; 44. a clip-shaped limiting rod; 45. a third spring; 46. a circular rod; 47. a rack; 48. a lower conical surface; 49. a second inclined plane.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, the tool comprises a tool shank 1, a clamping sleeve 2 and a collet chuck 4, wherein as shown in fig. 3, the tool shank 1 is arranged on a main shaft of a machine tool through a driving key slot 6 and a pull nail 5 on the tool shank; as shown in fig. 2 and 4, the collet chuck 4 is installed on the tool shank 1 through the thread fit of the jacket 2 and the tool shank 1, and the upper end of the tool 3 is nested in the collet chuck 4; the method is characterized in that: as shown in fig. 5 and 6, the inner circular surface of the upper end of the jacket 2 is a smooth surface, and a threaded sleeve 9 is arranged on the inner circular surface through the guide sliding block 33 and the guide sliding groove 21 in a vertically sliding fit manner; as shown in fig. 6, the driving ring 10 is installed inside the upper end of the jacket 2 in a vertically sliding manner, and the driving ring 10 is fixedly connected with the threaded sleeve 9; as shown in fig. 10, the limiting ring 12 is slidably mounted inside the collet 2, and the limiting ring 12 is located at the lower side of the transmission ring 10; a first spring 11 is arranged between the upper end face of the limiting ring 12 and the lower end face of the transmission ring 10; a second spring 13 is arranged between the lower end surface of the limiting ring 12 and the jacket 2.

The sandwich device designed by the invention is suitable for being used for installing a clamping drill bit or a milling cutter on a machining center or other machine tools.

The jacket 2 designed by the invention replaces the internal thread on the inner circular surface of the existing jacket 2 by the thread bush 9; in the installation process, the clamping sleeve 2 is rotated to drive the threaded sleeve 9 to rotate relative to the external thread at the lower end of the tool shank 1 through the matching of the guide sliding block 33 and the guide sliding groove 21, the threaded sleeve 9 rotates and moves upwards relative to the tool shank 1 under the action of thread matching, and the threaded sleeve 9 moves to pull the clamping sleeve 2 to move upwards relative to the tool shank 1 through the transmission ring 10, the first spring 11, the limiting ring 12 and the second spring 13 in sequence; and the collet 2 is fitted to the shank 1.

The first spring 11 and the second spring 13 designed by the invention are both extension springs and both have pretension; when the cutter 3 with the specification and size is installed and the cutter 3 is not worn, the jacket 2 can be pulled to move upwards through the combined action of the first spring 11 with pretension, the second spring 13 and the limiting mechanism 15.

According to the invention, after the clamping sleeve 2 drives the elastic chuck to move upwards to the position where the upper conical surface 8 on the elastic chuck is contacted with the conical surface of the inverted conical groove 7 on the tool holder 1, the rotating force for continuously rotating the clamping sleeve 2 is gradually increased, and finally the clamping sleeve 2 is tightened by the auxiliary wrench according to experience of a user.

As shown in fig. 7 and 13, three limiting mechanisms 15 for limiting the position of the limiting ring 12 are uniformly mounted on the lower end of the jacket 2 in the circumferential direction.

When a standard elastic chuck matched with the tool handle 1 and the jacket 2 and a corresponding matched tool 3 are installed, after the tool 3 is tightened by rotating the jacket 2, the position a of the jacket 2 relative to the tool handle 1 cannot release the limiting effect of the limiting mechanism 15 on the limiting ring 12.

When the elastic chuck with inner hole abrasion and the cutter 3 smaller than the elastic chuck are installed, the position b of the clamping sleeve 2 relative to the cutter handle 1 is larger than a in the process of tightening the cutter 3 by rotating the clamping sleeve 2, and the limiting effect of the limiting mechanism 15 on the limiting ring 12 can be relieved.

As shown in fig. 8 and 9, the inner side of the upper end of the jacket 2 is provided with an installation chute 20, the lower side of the installation chute 20 is provided with a spring installation groove 23, and a limiting step surface 22 for limiting the downward movement of the limiting ring 12 is formed between the spring installation groove 23 and the installation chute 20; the limiting step surface 22 is used for limiting the downward movement of the limiting ring 12 and ensuring that the second spring 13 is always in a stretching state.

As shown in fig. 6, the driving ring 10 and the limiting ring 12 are slidably mounted in the mounting chute 20 up and down, the first spring 11 is located in the mounting chute 20, the upper end of the second spring 13 is fixedly mounted on the lower end surface of the limiting ring 12, and the lower end of the second spring 13 is fixedly mounted on the bottom surface of the spring mounting groove 23.

As shown in fig. 7, three guide sliding grooves 21 are uniformly formed in the circumferential direction on the inner circumferential surface of the upper end of the jacket 2, and three guide sliding blocks 33 are uniformly formed in the circumferential direction on the outer circumferential surface of the threaded sleeve 9; the threaded sleeve 9 is mounted on the jacket 2 by sliding fit of three guide sliders 33 with three guide runners 21.

As shown in fig. 7 and 8, the inner end surfaces of the upper ends of the three guide chutes 21 are respectively provided with a connecting chute 19 communicated with the mounting chute 20; as shown in fig. 11, the driving ring 10 and the threaded sleeve 9 are fixedly connected by three connecting sliding blocks 32 which are uniformly distributed in the circumferential direction, and the three connecting sliding blocks 32 are in one-to-one corresponding sliding fit with the three connecting sliding grooves 19.

When the threaded sleeve 9 moves, the threaded sleeve 9 drives the driving ring 10 to move through the connecting slide 32.

The first spring 11 is an extension spring and has pretension; the second spring 13 is an extension spring and has a pretension.

As shown in fig. 7 and 8, the inner circular surface of the jacket 2 is uniformly provided with three limiting sliding grooves 28 in the circumferential direction, and as shown in fig. 12, the inner circular surface of the limiting ring 12 is uniformly provided with three sliding mounting grooves 34 in the circumferential direction; one side of each of the three sliding mounting grooves 34 is provided with a square groove 36, and one side of each of the three square grooves 36 is provided with an avoiding square groove 37; the other sides of the three square grooves 36 are provided with limiting clamping grooves 35; the three limiting mechanisms 15 are correspondingly arranged in a limiting sliding groove 28, a sliding installation groove 34, a square groove 36, a limiting clamping groove 35 and an avoiding square groove 37 which are arranged on the jacket 2 and the limiting ring 12.

As shown in fig. 3, the outer circumferential surface of the lower end of the holder 1 has a second inclined surface 49.

As shown in fig. 14, the limiting mechanism 15 includes a connecting rod 43, a clip-shaped limiting rod 44, and a third spring 45, wherein one end of the connecting rod 43 is fixedly installed with the clip-shaped limiting rod 44, and the clip-shaped limiting rod 44 is slidably installed in the corresponding limiting sliding groove 28 formed on the jacket 2 and the corresponding sliding installation groove 34 formed on the limiting ring 12; one end of the clip-shaped limiting rod 44 far away from the connecting rod 43 is matched with the corresponding square groove 36 and the limiting clamping groove 35 which are arranged on the limiting ring 12; a third spring 45 is arranged between one end of the clip-shaped limiting rod 44 far away from the connecting rod 43 and the mounting chute 20 arranged on the jacket 2, and the third spring 45 passes through the corresponding avoiding square groove 37.

One end of the connecting rod 43, which is far away from the clip-shaped limiting rod 44, is matched with a second inclined surface 49 at the lower end of the tool shank 1.

When the limiting mechanism 15 limits the limiting ring 12, one end of the clip-shaped limiting rod 44 in the limiting mechanism 15, which is far away from the corresponding connecting rod 43, is located in the corresponding limiting clamping groove 35 formed in the limiting ring 12, and the limiting ring 12 is limited in a moving mode through the clip-shaped limiting rod 44.

When a standard elastic chuck matched with the tool handle 1 and the jacket 2 and a corresponding matched tool 3 are installed, after the jacket 2 drives the elastic chuck to move upwards to enable an upper conical surface 8 on the elastic chuck to be contacted with a conical surface of an inverted conical groove 7 on the tool handle 1, the jacket 2 is continuously rotated, so that the jacket 2 drives the threaded sleeve 9 to continuously rotate relative to the tool handle 1, and the threaded sleeve 9 continuously rotates and continuously moves upwards relative to the tool handle 1. However, the upper conical surface 8 of the elastic chuck is in conical surface contact with the inverted conical groove 7 on the tool holder 1, and cannot move upwards continuously, the elastic chuck is matched with the tool 3, and the compressible amount of the elastic chuck is limited, so that the upward movement amount of the jacket 2 is limited in the process, the jacket 2 cannot enable the connecting rod 43 to be in relation with the second inclined surface 49, and the limiting ring 12 is limited by the limiting mechanism 15 and cannot move upwards; therefore, at this time, the screw sleeve 9 moves upwards to drive the transmission ring 10 to move upwards relative to the jacket 2, and the transmission ring 10 moves upwards to stretch the first spring 11; the first spring 11 is pulled to transmit pulling force to the jacket 2 through the limiting mechanism 15 and the second spring 13, so that the tightening force of the jacket 2 on the elastic chuck and the tool handle 1 is increased; namely, the stability of the cutter 3 arranged in the elastic chuck in the using process is improved.

When the elastic chuck with the worn inner hole and the cutter 3 which is smaller than the elastic chuck are installed, after the thread sleeve 9 drives the jacket 2 to move upwards to enable the upper conical surface 8 on the elastic chuck to be in contact with the conical surface of the inverted conical groove 7 on the tool holder 1, the elastic chuck can be compressed to a large degree in the process of continuing rotating the jacket 2, so that the jacket 2 moves upwards to a large degree in the process, the jacket 2 enables the connecting rod 43 to be in relation with the second inclined surface 49, the limit of the limiting ring 12 is released, and the limiting ring 12 can move upwards; when the tensile force of the first spring 11 is released, the rotating force of the rotating jacket 2 of the user is suddenly reduced, and after the force is sensed to be reduced, people can realize that the cutter 3 is possibly worn or the cutter 3 is not installed, and then the rotating jacket 2 is stopped; the damage to the collet caused by continuing to rotate the collet 2 can be prevented to a certain extent.

The circular surface of the mounting chute 20 formed on the jacket 2 far away from the center of the jacket 2 is circumferentially and uniformly provided with three round holes 31, one side of each round hole 31 is provided with a rack mounting groove 27, one side of each rack mounting groove 27 is provided with a gear mounting groove 29, and one side of each gear mounting groove 29 close to the center of the chuck is provided with a gear ring mounting groove 30.

As shown in fig. 13, in the three limiting mechanisms 15, one end of the clip-shaped limiting rod 44 away from the connecting rod 43 is fixedly provided with a circular rod 46, one end of the circular rod 46 away from the corresponding clip-shaped limiting rod 44 passes through the three circular holes 31 and is located in the three rack mounting grooves 27, the three racks 47 are respectively mounted at one ends of the circular rods 46 located in the rack mounting grooves 27, the three gears 16 are rotatably mounted in the three gear mounting grooves 29, and the three gears 16 and the three racks 47 are correspondingly engaged with each other one by one; the ring gear 17 is mounted in the ring gear mounting groove 30, and the ring gear 17 is engaged with the three gears 16.

According to the invention, the three connecting rods 43 keep synchronism in sliding through the designed gear 16 and the designed gear ring 17, so that the phenomenon that one connecting rod 43 is rusted and clamped is prevented, and the judgment on whether the elastic chuck is clamped or not is influenced. When one of the connecting rods 43 is triggered, the connecting rod 43 drives the corresponding rack 47 to slide through the corresponding clip-shaped limiting rod 44 and the circular rod 46, the rack 47 slides to drive the corresponding gear 16 to rotate, the gear 16 rotates to drive the gear ring 17 to rotate, the gear ring 17 rotates to drive the other two gears 16 to rotate, and further the other two racks 47 are driven to slide, and further the other two connecting rods 43 are pulled to move, so that the limiting on the limiting ring 12 is released.

Meanwhile, when the second inclined surface 49 and the first inclined surface 40 of the swing rod 39 are abraded, the synchronization of the gear 16 and the gear ring 17 can also increase the reliability of the contact limit.

The lower end surface of the jacket 2 is provided with an installation ring groove 26, and the inner end surface of the installation ring groove 26 is provided with three through square sliding grooves 24 uniformly in the circumferential direction.

As shown in fig. 14, a swing rod 39 is hinged to one end of the connecting rod 43 away from the return-type limiting rod 44, and a limiting plate 41 swinging downward to the swing plate is mounted at the lower end of the limiting rod; a plate spring 42 is installed between the limiting rod and the connecting rod 43.

As shown in fig. 13, a trigger rod 14 is installed in each of the three square sliding grooves 24, the trigger ring 38 is slidably installed in the installation ring groove 26, and the trigger ring 38 is fixedly connected to the lower ends of the three trigger rods 14; the upper ends of the three trigger rods 14 are respectively matched with swing rods 39 arranged on three connecting rods 43 in the three limiting mechanisms 15.

The upper sides of the three swing rods 39 far away from one end of the corresponding connecting rod 43 are respectively provided with a first inclined surface 40; the upper sides of three limit sliding grooves 28 formed on the jacket 2 are respectively provided with an avoidance groove 18 for avoiding the corresponding swing rod 39.

The third spring 45 is a compression spring and has a preload. The third spring 45 is used for restoring the return-type limiting rod 44.

When the spring chuck 4 and the jacket 2 of the original factory are used, when the cutter 3 with the specification and the size is installed and the cutter 3 is not worn, the matching point of the connecting rod 43 and the second inclined surface 49 at the lower end of the cutter handle 1 is determined; the limit ring 12 cannot be relieved from limiting under the condition of ensuring the clamping of the cutter 3; if the elastic chuck of other manufacturers is used in the using process, although the elastic chuck is of one model, the elastic chuck and the elastic chuck have errors, so that the matching point of the connecting rod 43 and the second inclined surface 49 at the lower end of the tool shank 1 is deviated; when the elastic chuck is slightly smaller, the limiting ring 12 is relieved from limiting before the cutter 3 is clamped, and in this case, the cutter 3 cannot be clamped; in order to solve this problem, the present invention designs the trigger lever 14, and the front end of the connecting lever 43 is designed to be swingable.

The plate spring 42 designed by the invention plays a role in resetting the swing rod 39; when the collet chuck of the factory is used, if the swing rod 39 is in contact with the second inclined surface 49 at the lower end of the tool holder 1, the second inclined surface 49 extrudes the swing rod 39 downwards, and the lower side of the swing rod 39 is limited by the limiting plate 41, so that the swing rod 39 cannot be extruded and swung backwards; namely, the swing link 39 can normally trigger the connecting rod 43 and the return type limit plate 41 to release the limit of the limit ring 12.

The specific working process is as follows: when the device designed by the invention is used, when a standard elastic chuck matched with the tool handle 1 and the jacket 2 and a corresponding matched tool 3 are installed, the jacket 2 is rotated to drive the threaded sleeve 9 to rotate relative to the external thread at the lower end of the tool handle 1 through the matching of the guide sliding block 33 and the guide sliding groove 21, the threaded sleeve 9 rotates under the action of thread matching and moves upwards relative to the tool handle 1, and the threaded sleeve 9 moves to pull the jacket 2 to move upwards relative to the tool handle 1 through the transmission ring 10, the first spring 11, the limiting ring 12 and the second spring 13 in sequence; after the clamping sleeve 2 drives the elastic chuck to move upwards to the upper conical surface 8 on the elastic chuck to be in contact with the conical surface of the inverted conical groove 7 on the tool shank 1, the clamping sleeve 2 continues to rotate, so that the clamping sleeve 2 drives the threaded sleeve 9 to continue to rotate relative to the tool shank 1, the threaded sleeve 9 continues to move upwards after continuing to rotate, but the upper conical surface 8 of the elastic chuck and the inverted conical groove 7 on the tool shank 1 are also in a conical surface contact state and cannot continue to move upwards, the elastic chuck is matched with the tool 3, the compressible amount of the elastic chuck is limited, the upward movement amount of the clamping sleeve 2 is limited in the process, the connecting rod 43 cannot be in relation with the second inclined surface 49 by the clamping sleeve 2, and the limiting ring 12 is limited by the limiting mechanism 15 and cannot move upwards; therefore, at this time, the screw sleeve 9 moves upwards to drive the transmission ring 10 to move upwards relative to the jacket 2, and the transmission ring 10 moves upwards to stretch the first spring 11; the first spring 11 is pulled to transmit pulling force to the jacket 2 through the limiting mechanism 15 and the second spring 13, so that the tightening force of the jacket 2 on the elastic chuck and the tool handle 1 is increased; namely, the stability of the cutter 3 arranged in the elastic chuck in the using process is improved.

When the elastic chuck with worn inner hole and the cutter 3 which is smaller than the elastic chuck are installed, the thread sleeve 9 drives the jacket 2 to move upwards to enable the upper conical surface 8 on the elastic chuck to contact with the conical surface of the inverted conical groove 7 on the tool holder 1, and then the compressible degree of the elastic chuck is larger in the process of continuously rotating the jacket 2, so that the upward moving degree of the jacket 2 is larger in the process, the upward moving of the jacket 2 can drive the connecting rod 43 in the limiting mechanism 15 to move upwards, in the upward moving process, after one end of the connecting rod 43 far away from the reverse limiting rod 44 is matched with the second inclined surface 49 at the lower end of the tool holder 1, the connecting rod 43 can be extruded to slide towards one side of the limiting ring 12 under the action of the second inclined surface 49, the connecting rod 43 moves to drive the corresponding reverse limiting rod 44 to move, and the end of the reverse limiting rod 44 far away from the connecting rod 43 is separated from the corresponding limiting, at this time, the shape-returning limiting rod 44 loses the limiting effect on the limiting ring 12, and the limiting ring 12 moves upwards under the pulling force of the first spring 11; when the tensile force of the first spring 11 is released, the rotating force of the rotating jacket 2 of the user is suddenly reduced, and after the force is sensed to be reduced, people can realize that the cutter 3 is possibly worn or the cutter 3 is not installed, and then the rotating jacket 2 is stopped; the damage to the collet caused by continuing to rotate the collet 2 can be prevented to a certain extent.

In the process of using the elastic chucks of other manufacturers, firstly, a test is carried out to see whether the elastic chucks of the manufacturers are suitable for the jacket 2 of the manufacturers; if the elastic chuck is applicable, the elastic chuck can be continuously used, if the elastic chuck is not applicable, but the elastic chuck which is not applicable is not damaged, in order to ensure that the elastic chuck of other factories can also be used on the jacket 2, at the moment, only the trigger ring 38 needs to be pressed, so that the trigger ring 38 drives the three trigger rods 14 to move inwards, the trigger rods 14 move to extrude the three swing rods 39, the three swing rods 39 vertically swing upwards, after the three swing plates are straightened, the upper ends of the three trigger rods 14 are positioned at one side of the corresponding swing rods 39 to limit the corresponding swing plates, and the swing rods 39 can not reset under the action of the plate springs 42; in this case, the collet 2 can be rotated continuously to clamp the collet of a non-original factory.

Claims

1. A sandwich device for a machining center comprises a tool shank, a jacket and a spring chuck, wherein the tool shank is arranged on a main shaft of a machine tool through a driving key slot and a blind rivet on the tool shank; the spring chuck is arranged on the knife handle in a threaded fit way through the jacket and the knife handle, and the upper end of the cutter is nested in the spring chuck; the method is characterized in that: the inner circular surface at the upper end of the clamping sleeve is a smooth surface, and a threaded sleeve is arranged on the inner circular surface through the up-down sliding fit of the guide sliding block and the guide sliding chute; the transmission ring is arranged on the inner side of the upper end of the clamping sleeve in a vertically sliding manner and is fixedly connected with the threaded sleeve; the limiting ring is arranged on the inner side of the jacket in a sliding manner and is positioned on the lower side of the transmission ring; a first spring is arranged between the upper end surface of the limiting ring and the lower end surface of the transmission ring; a second spring is arranged between the lower end surface of the limiting ring and the jacket;

three limiting mechanisms which have limiting effect on the limiting ring are uniformly arranged at the lower end of the jacket in the circumferential direction;

when a standard elastic chuck matched with the tool handle and the jacket and a corresponding matched tool are installed, after the tool is tightened by rotating the jacket, the position a of the jacket relative to the tool handle can not release the limiting effect of the limiting mechanism on the limiting ring;

2. The center core device as claimed in claim 1, wherein: the inner side of the upper end of the jacket is provided with a mounting chute, the lower side of the mounting chute is provided with a spring mounting groove, and a limiting step surface for limiting the downward movement of the limiting ring is formed between the spring mounting groove and the mounting chute;

3. The center core device as claimed in claim 1, wherein: three guide sliding chutes are uniformly formed in the circumferential direction on the inner circular surface at the upper end of the clamping sleeve, and three guide sliding blocks are uniformly arranged in the circumferential direction on the outer circular surface of the threaded sleeve; the thread bush is arranged on the clamping sleeve through the sliding fit of the three guide sliding blocks and the three guide sliding grooves.

4. A machining center sandwich device according to claim 2 or 3, characterized in that: the inner end surfaces of the upper ends of the three guide chutes are respectively provided with a connecting chute communicated with the mounting chute; the transmission ring is fixedly connected with the threaded sleeve through three connecting sliding blocks which are uniformly distributed in the circumferential direction, and the three connecting sliding blocks are in one-to-one corresponding sliding fit with the three connecting sliding grooves.

5. The center core device as claimed in claim 1, wherein: the first spring is an extension spring and has pretension; the second spring is an extension spring and has a pretension.

6. The center core device as claimed in claim 1, wherein: three limiting sliding chutes are uniformly formed in the circumferential direction on the inner circular surface of the jacket, and three sliding mounting grooves are uniformly formed in the circumferential direction on the inner circular surface of the limiting ring; one side of each of the three sliding installation grooves is provided with a square groove, and one side of each of the three square grooves is provided with an avoidance square groove; the other side of the three square grooves is provided with a limiting clamping groove; the three limiting mechanisms are correspondingly arranged in a limiting sliding groove, a sliding installation groove, a square groove, a limiting clamping groove and an avoiding square groove which are formed on the jacket and the limiting ring;

a second inclined plane is arranged on the outer circular surface at the lower end of the cutter handle;

the limiting mechanism comprises a connecting rod, a clip-shaped limiting rod and a third spring, wherein the clip-shaped limiting rod is fixedly arranged at one end of the connecting rod and is slidably arranged in a corresponding limiting sliding groove formed in the jacket and a corresponding sliding installation groove formed in the limiting ring; one end of the clip-shaped limiting rod, which is far away from the connecting rod, is matched with a corresponding square groove and a limiting clamping groove which are formed on the limiting ring; a third spring is arranged between one end of the clip-shaped limiting rod far away from the connecting rod and the mounting chute arranged on the jacket, and the third spring penetrates through the corresponding avoiding square groove;

7. The center core device as claimed in claim 6, wherein: three circular holes are uniformly formed in the circumferential direction of the circular surface, away from the center of the clamping sleeve, of the mounting chute formed in the clamping sleeve, one side of each circular hole is provided with a rack mounting groove, one side of each rack mounting groove is provided with a gear mounting groove, and one side, close to the center of the clamping sleeve, of each gear mounting groove is provided with a gear ring mounting groove;

8. The center core device as claimed in claim 6, wherein: the lower end face of the jacket is provided with a mounting ring groove, and the inner end face of the mounting ring groove is uniformly provided with three through square sliding grooves in the circumferential direction;

one end of the connecting rod, which is far away from the return limiting rod, is hinged with a swing rod, and the lower end of the limiting rod is provided with a limiting plate which swings downwards relative to the swing plate; a plate spring is arranged between the limiting rod and the connecting rod;

9. The device of claim 8, wherein: the upper sides of the three swing rods, which are far away from one end of the corresponding connecting rod, are respectively provided with a first inclined plane; the upper sides of the three limiting sliding grooves on the jacket are respectively provided with an avoiding groove for avoiding the corresponding swing rod.

10. The center core device as claimed in claim 6, wherein: the third spring is a compression spring and has pre-pressure.