Multifunctional knife handle

Abstract

The utility model discloses a multifunctional knife handle which comprises a knife handle body. A damping connecting rod; the collet is arranged in the clamping groove in a penetrating mode and used for being connected with an external tool. A first internal thread matched with the first external thread is formed on the inner wall of the nut, and the nut is connected to the vibration reduction connecting rod in a screwed mode; the damping attenuation mechanism is arranged between the vibration reduction connecting rod and the cutter handle main body and is used for relieving vibration of an external cutter; when the nut is rotated and the collet chuck is pushed to move axially, the collet chuck is squeezed by the clamping groove to contract so as to clamp an external cutter. According to the utility model, the trumpet-shaped clamping groove is adopted to extrude and contract the collet, so that the locking force and the connection strength of an external cutter are effectively improved, and meanwhile, the vibration generated when the external cutter works is relieved through the damping attenuation mechanism, so that the surface precision of a machined workpiece can be effectively ensured; the phenomenon that the cutting edge of an external cutter is cracked is avoided, the service life of the cutter is prolonged, and the use requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to machine tool tool technical field, especially a multifunctional tool holder. BACKGROUND

[0002] The tool holder is a connecting piece of the mechanical spindle, tool and other accessories.

[0003] At present, the tool holder and the tool are generally clamped and fixed by the collet installed in the tool holder when being matched and installed, and then are locked on the tool holder by the nut. The traditional strong tool holder has high locking force, and the tool holder precision cannot be well guaranteed due to the structural limitation, and is only suitable for rough machining. For example, the Chinese utility model patent application with the patent announcement number CN217941891U discloses a split tool holder, which comprises a tool holder body, a handle and a locking screw. The tool holder body is provided with a plug-in hole at one end for connecting the handle. An auxiliary locking hole is further provided in the plug-in hole. A clamping nut is threadedly connected to the auxiliary locking hole. A through hole is provided in the middle of the clamping nut. The tool holder body is provided with a receiving cavity at the end away from the plug-in hole for accommodating the head of the locking screw. The head of the locking screw is provided with a locking groove. An operation hole is provided in the middle of the tool holder body and is connected to the receiving cavity and the installation hole. The structure is simple, and when the diameter of the operation hole is constant, a larger diameter locking screw can be used to improve the locking force and the connection strength of the handle, that is, the locking force and the connection strength of the handle are improved without affecting the rigidity of the tool holder body.

[0004] However, the existing split tool holder still has the following disadvantages:

[0005] In the technical scheme, the handle is locked by the locking screw, and the locking force and the connection strength of the handle can be improved by using a larger diameter locking screw. However, with the increase of workpiece hardness, the application of composite materials and the strictness of machining requirements, such a mode cannot guarantee the machining precision, and there is no structure in the structure to buffer the vibration of the tool. After long-term use, it is difficult to ensure the surface precision of the machined workpiece, and serious even can cause the micro-collapse of the tool cutting edge, affecting the service life of the tool, and it is difficult to meet the requirements.

[0006] Therefore, the present inventors propose the following technical scheme. UTILITY MODEL CONTENT

[0007] The utility model aims at overcoming the defects of the prior art and provides a multifunctional tool holder.

[0008] In order to solve the above technical problems, the utility model adopts the following technical scheme: A multifunctional tool shank, comprising: a tool shank main body, a connecting cavity is formed in the tool shank main body; a damping connecting rod is arranged in the connecting cavity, the damping connecting rod is provided with a gradually narrowing and trumpet-shaped clamping groove, and a first external thread is formed on the damping connecting rod; a collet is arranged in the clamping groove and used for connecting an external tool; a nut is provided with a first internal thread matched with the first external thread on the inner wall, and the nut is screwed on the damping connecting rod; a damping attenuation mechanism is arranged between the damping connecting rod and the tool shank main body and used for relieving vibration of the external tool; when the nut is rotated and the collet is pushed to move axially, the collet is extruded and shrunk by the clamping groove to clamp the external tool.

[0009] Further, in the above technical scheme, a cylinder hole for inserting the external tool is formed in the collet, and the collet is trumpet-shaped and embedded in the clamping groove.

[0010] Further, in the above technical scheme, a cap hole for the external tool to pass through is formed in the nut and communicates with the cylinder hole, and a nut pushing part for pushing the collet is further formed in the nut.

[0011] Further, in the above technical scheme, a positioning sleeve for circumferential positioning of the damping connecting rod is arranged on the damping connecting rod, the positioning sleeve is circumferentially positioned by a first positioning screw, a plurality of first screw holes are formed in the positioning sleeve, and a plurality of first through holes are formed in the tool shank main body corresponding to the first screw holes, and the first positioning screw passes through the first through holes and is screwed in the first screw holes.

[0012] Further, in the above technical scheme, the damping connecting rod comprises a clamping section for inserting the collet and an axle section integrally formed with the clamping section and used for sleeving the damping attenuation mechanism, a plurality of damping ring grooves are formed in the axle section, and a second screw hole is formed in the axle section.

[0013] Further, in the above technical scheme, the damping attenuation mechanism comprises: a plurality of sealing rings sleeved on the clamping section and used for enhancing sealing performance, a plurality of steel balls arranged between the damping connecting rod and the tool shank main body, a plurality of damping rings sleeved on the damping connecting rod and used for providing damping, a sleeve sleeved on the damping connecting rod and used for increasing axial strength, a second screw screwed in the second screw hole, and a gasket locked and fixed by the second screw and used for damping.

[0014] Further, in the above technical scheme, the damping ring is sleeved in the damping ring groove, damping liquid for increasing damping is arranged in the damping ring groove, and a gasket for preventing damage to the gasket is arranged between the gasket and the axle section.

[0015] Further in the above technical solutions, the connecting body is formed in a horn shape on the shank body, and the connecting screw hole for connecting with the external machine is formed on the connecting body.

[0016] Further in the above technical solutions, the locking clamping position for the external wrench to twist is formed on the damping connecting rod.

[0017] After the above technical solutions, the utility model has the following beneficial effects compared with the prior art: in the utility model, the horn-shaped clamping groove is used to extrude and shrink the collet, which effectively improves the locking force and connection strength of the external tool, at the same time, the vibration generated by the external tool during work is relieved through the damping attenuation mechanism, which can effectively ensure the surface precision of the workpiece, avoid the collapse phenomenon of the external tool cutting edge, improve the service life of the tool, meet the use requirements, and be applied to various tool shank structures. In addition, compared with the existing structure, the collet is driven to move axially by the screw cap and the damping connecting rod in the utility model to realize clamping and loosening of the external tool, when installing or replacing the tool, only the screw cap needs to be rotated by the wrench to realize locking or loosening of the tool, the structure is simple and does not need regular maintenance and maintenance, the cost is relatively low, the use is convenient, and it is suitable for various rough and fine machining. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Fig. 2 is a schematic diagram of the utility model;

[0020] Fig. 3 is a schematic diagram of the utility model;

[0021] Fig. 4 is a schematic diagram of the cross section of the utility model after disassembly. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with specific embodiments and drawings.

[0023] See Figs. 1 to 4As shown, it is a multifunctional knife handle, which comprises a knife handle body 1, a connecting cavity 11 is opened on the knife handle body 1, a damping connecting rod 2 is penetrated in the connecting cavity 11, the damping connecting rod 2 is opened with gradually narrowing and trumpet-shaped clamping groove 21, and the first external thread 22 is formed on the damping connecting rod 2, a collet 3 is penetrated in the clamping groove 21 and is used for connecting external tool, a nut 4, the inner wall of the nut 4 is formed with the first internal thread 41 matched with the first external thread 22, the nut 4 is screwed on the damping connecting rod 2, a damping attenuation mechanism 5 is arranged between the damping connecting rod 2 and the knife handle body 1 and is used for relieving external tool vibration, when the nut 4 is rotated and the collet 3 is pushed to move axially, the collet 3 is extruded and shrunk by the clamping groove 21 to clamp the external tool.

[0024] In the utility model, the trumpet-shaped clamping groove 21 is used for extruding and shrinking the collet 3, the locking force and the connecting strength of the external tool are effectively improved, meanwhile, the vibration generated during the operation of the external tool is relieved by the damping attenuation mechanism 5, the surface precision of the workpiece can be effectively ensured, the collapse phenomenon of the cutting edge of the external tool is avoided, the service life of the tool is improved, the use requirement is met, and the utility model can be applied to various knife handle structures.

[0025] The collet 3 is penetrated with a barrel hole 31 for inserting the external tool, and the collet 3 is trumpet-shaped and embedded in the clamping groove 21. Here, the clamping groove 21 is trumpet-shaped, when the collet 3 moves axially, the clamping groove 21 generates a clamping force on the collet 3 to extrude and force the collet 3 to shrink, thereby tightly wrapping the external tool without dead angle and achieving the clamping effect.

[0026] The nut 4 is opened with a cap hole 43 communicated with the barrel hole 31 and used for passing the external tool, and the nut 4 is further formed with a nut pushing part 42 for pushing the collet 3. Here, when the nut 4 is twisted by a wrench, the nut pushing part 42 abuts against the front end of the collet 3 to drive the collet 3 to move axially inwardly. It can be understood that the clamping degree of the collet 3 on the external tool depends on the tightness of the nut 4, the tighter the nut 4 is twisted, the greater the clamping force of the collet 3 is, and the nut 4 can be twisted to lock or release the tool by a wrench, which is very convenient to operate.

[0027] The damping connecting rod 2 is sleeved with a positioning sleeve 8 for circumferential limiting of the damping connecting rod 2, the positioning sleeve 8 is circumferentially positioned by the first positioning screw 6, a plurality of first screw holes 23 are formed in the positioning sleeve 8, and the tool handle body 1 is provided with a plurality of first through holes 12 corresponding to the first screw holes 23, and the first positioning screw 6 passes through the first through hole 12 and is screw-fixed in the first screw hole 23. Here, in order to prevent the damping connecting rod 2 from being accidentally rotated circumferentially due to vibration in the tool handle body 1, the positioning sleeve 8 is tightly sleeved on the damping connecting rod 2, and the positioning sleeve 8 is circumferentially limited by the plurality of first screw holes 23, which effectively prevents the damping connecting rod 2 from being accidentally rotated, avoids punching holes on the damping connecting rod 2, helps to improve the rigidity of the damping connecting rod 2, and reduces the processing difficulty.

[0028] The damping connecting rod 2 comprises a clamping section 24 for inserting the collet 3 and an axial body section 25 integrally formed with the clamping section 24 and sleeved with the damping attenuation mechanism 5, a plurality of damping ring grooves 251 are formed in the axial body section 25, and a second screw hole 252 is formed in the axial body section 25. The damping attenuation mechanism 5 comprises: a plurality of sealing rings 51 sleeved on the clamping section 24 and used for enhancing the sealing performance, a plurality of steel balls 52 arranged between the damping connecting rod 2 and the tool handle body 1, a plurality of damping rings 53 sleeved on the damping connecting rod 2 and used for providing damping, a sleeve 54 sleeved on the damping connecting rod 2 and used for increasing the axial strength, a second screw 55 screw-mounted in the second screw hole 252, and a gasket 56 locked and fixed by the second screw 55 and used for damping. The damping ring 53 is sleeved in the damping ring groove 251, damping liquid for increasing damping is arranged in the damping ring groove 251, and a gasket 57 is arranged between the gasket 56 and the axial body section 25 to prevent damage to the gasket 56. Here, the damping attenuation mechanism 5 realizes multi-level damping through the damping ring 53, the steel ball 52, the sleeve 54 and the gasket 56, effectively alleviates the vibration of the external tool during machining, and reduces the loss of the external tool.

[0029] The tool handle body 1 is formed with a connecting body 101 in the shape of a horn, and the connecting body 101 is provided with a connecting screw hole 102 for connecting with an external machine.

[0030] The damping connecting rod 2 is formed with a locking clamping position 201 for being twisted by an external wrench. Here, when the external tool is assembled or disassembled, one wrench can be used to clamp the locking clamping position 201, and the other wrench can be used to clamp the nut 4, so as to rotate the nut 4 to lock or unlock the external tool, thereby further improving the use convenience.

[0031] In summary, in the utility model, the collet 3 is extruded and contracted by the trumpet-shaped receiving and clamping groove 21, the locking force and the connecting strength of the external tool are effectively improved, simultaneously, the vibration generated when the external tool works is relieved by the damping attenuation mechanism 5, the surface precision of the workpiece being processed can be effectively ensured, the phenomenon of the collapse of the cutting edge of the external tool is avoided, the service life of the tool is improved, the use requirement is met, the utility model can be applied to various tool shank structures. In addition, compared with the prior art, in the utility model, the collet 3 is driven to move axially by the screw cap 4 and the damping connecting rod 2 to realize clamping and loosening the external tool, when the tool is installed or replaced, the tool can be locked or loosened by rotating the screw cap 4 by a wrench, the structure is simple, periodical maintenance and maintenance are not needed, the cost is relatively low, the utility model is convenient to use and is suitable for various rough and fine machining.

[0032] Of course, the above only is the specific embodiment of the utility model, and does not limit the utility model implementation range, and the equivalent change or modification of the structure, feature and principle of the utility model application patent range should be included in the utility model application patent range.

Claims

1. A multi-functional knife handle, characterized in that, include: The handle body (1) has a connecting cavity (11) on it. The vibration damping connecting rod (2) is inserted into the connecting cavity (11). The vibration damping connecting rod (2) has a gradually narrowing and trumpet-shaped clamping groove (21), and the vibration damping connecting rod (2) has a first external thread (22). A collet (3) is inserted into the receiving groove (21) and used to connect an external cutting tool; Nut (4), the inner wall of which is formed with a first internal thread (41) that matches the first external thread (22), and the nut (4) is helically connected to the vibration damping connecting rod (2); Damping attenuation mechanism (5), which is disposed between the vibration damping connecting rod (2) and the tool holder body (1) and is used to alleviate external tool vibration; When the nut (4) is rotated and the collet (3) is pushed to move axially, the collet (3) is squeezed and contracted by the clamping groove (21) to clamp the external tool.

2. A multi-functional knife handle according to claim 1, characterized in that: The collet (3) has a through hole (31) for inserting external tools. The collet (3) is flared and is embedded in the receiving groove (21).

3. A multi-functional knife handle according to claim 2, characterized in that: The nut (4) has a cap hole (43) that communicates with the cylinder hole (31) and is used for external cutting tools to pass through. The nut (4) also has a nut pushing part (42) formed inside for pushing the collet (3).

4. A multi-functional knife handle according to claim 1, characterized in that: The vibration damping connecting rod (2) is fitted with a positioning sleeve (8) for circumferentially limiting the vibration damping connecting rod (2). The positioning sleeve (8) is circumferentially positioned by a first positioning screw (6). The positioning sleeve (8) has several first screw holes (23). Correspondingly, the knife handle body (1) has several first through holes (12). The first positioning screw (6) passes through the first through hole (12) and is screwed and fixed in the first screw hole (23).

5. A multi-functional knife handle according to any one of claims 1-4, characterized in that: The vibration damping connecting rod (2) includes a clamping section (24) for inserting a collet (3) and a shaft section (25) integrally formed with the clamping section (24) and used for the damping attenuation mechanism (5) to be fitted. The shaft section (25) has several damping ring grooves (251) formed on it, and a second screw hole (252) is also provided on the shaft section (25).

6. A multi-functional knife handle according to claim 5, characterized in that: The damping attenuation mechanism (5) includes: several sealing rings (51) sleeved on the clamping section (24) for enhancing sealing performance; several steel balls (52) disposed between the damping connecting rod (2) and the tool holder body (1); several damping rings (53) sleeved on the damping connecting rod (2) for providing damping; bushings (54) sleeved on the damping connecting rod (2) for increasing axial strength; a second screw (55) screwed into the second screw hole (252); and a washer (56) locked and fixed by the second screw (55) for damping.

7. A multi-functional knife handle according to claim 6, characterized in that: The damping ring (53) is fitted in the damping ring groove (251), and the damping ring groove (251) is provided with damping fluid for increasing damping. A washer (57) is provided between the gasket (56) and the shaft section (25) to prevent damage to the gasket (56).

8. A multi-functional knife handle according to claim 5, characterized in that: The main body (1) of the tool holder is formed with a trumpet-shaped connector (101), and the connector (101) is provided with a connecting screw hole (102) for connecting with an external machine tool.

9. A multi-functional knife handle according to any one of claims 6-8, characterized in that: The vibration damping connecting rod (2) has a locking slot (201) formed on it for an external wrench to twist.

Images