Driven cutter handle easy to disassemble

Abstract

The utility model discloses a driven easily-dismantled knife handle which comprises a knife handle body, a gland, an elastic collet chuck, a cutting tool, a driven shaft body, a driving wheel, a first bearing and a second bearing, the driven shaft body is rotatably installed in a hollow cavity through the first bearing and the second bearing, and an inner thread is arranged on the inner wall of a center hole in the top of the driven shaft body. A threaded connector connected with the tail of the elastic collet chuck penetrates through the axial channel and then is in threaded connection with an inner thread on the top of the elastic collet chuck, a crown tooth part is arranged on the outer wall of the middle of the driven shaft body in a surrounding mode, and the four driving wheels penetrate through corresponding inserting holes in the cutter handle body in a surrounding mode at intervals and then enable bevel tooth parts of the driving wheels to be meshed with the crown tooth part of the driven shaft body. The elastic collet chuck can be tensioned inwards by rotating the nut part of each driving wheel, and the elastic collet chuck can contract to hold a cutting tool tightly while tensioning. By the adoption of a multi-point driving structure for torque transmission and convenient threaded connection, mounting and dismounting are convenient, and clamping and replacing efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cutting tool holder technical field, more specifically, relate to a driven easy disassembly tool holder. BACKGROUND

[0002] Tool holder is the connecting piece of machine spindle and tool and other accessory tools, with the development of manufacturing industry to high precision and miniaturization, higher standard is put forward to tool clamping technology, traditional clamping structure is more for the screw cap clamping or is the principle of thermal expansion and contraction clamping, these clamping operation risks are relatively bigger, for example, traditional rear pull tool holder clamping needs to take down the tool holder from the machine tool, then unloads the rear pull pin of tool holder, needs to use spanner to tighten the rear pull screw after installation, locks the tool, this series of steps is time-consuming and tedious, reduces the efficiency of tool replacement, this kind of installation and replacement tool mode wastes time and is very low in efficiency, and because tool replacement needs longer time, causes machine tool frequent shutdown, affects overall production efficiency. SUMMARY

[0003] The utility model discloses a driven easy disassembly tool holder which overcomes the above-mentioned defects in the prior art, adopts a multi-point driving structure of torque transmission and convenient thread connection, is convenient to install and disassemble, and significantly improves the clamping and replacement efficiency.

[0004] To achieve the above object, the utility model provides a driven easy disassembly tool holder, including tool holder body, gland, elastic cylinder clamp, cutting tool, driven shaft body, driving wheel, first bearing and second bearing, the one end of tool holder body is opened and is inwardly recessed with inner chamber, the upper end opening of gland is fixed cover and is arranged at the opening position of inner chamber, the hollow cavity is formed between tool holder body and gland, the upper and lower ends of driven shaft body are rotatably installed in hollow cavity through first bearing and second bearing, the lower end middle part of gland is provided with the axial passage that communicates its upper end opening, the inner wall of driven shaft body top center hole is provided with internal screw thread, the threaded joint of elastic cylinder clamp tail connection passes through axial passage and the bottom opening of driven shaft body and is connected with the internal screw thread of its top, cutting tool is inserted at the clamping site of elastic cylinder clamp and is clamped by elastic cylinder clamp, the outer wall of driven shaft body middle part is provided with crown tooth portion, the driving wheel is provided with four and is respectively interval and surrounds the insertion hole of tool holder body, makes its bevel gear portion and the crown tooth portion of driven shaft body meshing after passing, the nut site of four driving wheels is rotatably inserted in insertion hole and is exposed on the outer wall of tool holder body, can drive driven shaft body synchronous rotation by rotating the nut site of each driving wheel, so as to realize that elastic cylinder clamp is pulled inwards tightly, and the elastic cylinder clamp can contract and hold tightly cutting tool simultaneously.

[0005] As preferred, the clamping part of the elastic collet is provided in a conical frustum structure, the bottom of the clamping part of the elastic collet is inwardly recessed to provide a clamping hole for inserting the cutting tool, and a plurality of expansion joints are provided on the outer wall of the clamping part of the elastic collet and are in communication with the clamping hole.

[0006] As preferred, the first bearing and the second bearing are respectively provided as a first roller group and a second roller group, the first roller group and the second roller group are respectively composed of a plurality of rollers, and the rollers are provided in a spherical shape or a cylindrical shape.

[0007] As preferred, the upper outer side wall of the driven shaft body is outwardly protruded to provide a first annular eave, the inner wall of the inner cavity of the tool shank body is protruded to provide a first annular limiting part, and the first roller group is movably arranged between the first annular limiting part and the first annular eave.

[0008] As preferred, the bottom outer side wall of the driven shaft body is outwardly protruded to provide a second annular eave, the top inner end surface of the gland is recessed to provide a second annular limiting part, and the second roller group is movably arranged between the second annular eave and the second annular limiting part.

[0009] As preferred, the first sealing ring and the second sealing ring are further included, the first annular mounting groove is provided on the top outer wall surface of the driven shaft body, the first sealing ring is sleeved on the first annular mounting groove, the second annular mounting groove is recessed on the top inner end surface of the gland, and the second sealing ring is embedded in the second annular mounting groove and located on the bottom surface of the driven shaft body.

[0010] As preferred, a plurality of third sealing rings are further included, and the third sealing rings are respectively embedded in the third annular mounting grooves on the inner walls of each insertion hole of the tool shank body.

[0011] As preferred, the screw nut part of the driving wheel is provided in a cross-shaped screw nut, a linear screw nut or a polygonal screw nut.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] The utility model discloses a simple, novel structure, reasonable design, through adopting the multi-point drive structure of torque transmission and the convenient thread connection, the surrounding distribution of four driving wheels can evenly disperse the load, reduces the concentrated stress, enhances the stability of torque transmission, and the thread connection makes installation and dismounting become easy and convenient, and the operator can only rotate to complete dismounting, remarkably improves the clamping replacement efficiency, saves time and energy, reduces downtime, and greatly improves the overall production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 is a structural schematic diagram of the driven easy-to-disassemble tool shank provided by the embodiment of the present application;

[0016] Figure 2 is a cross-sectional schematic diagram of the driven easy-to-disassemble tool shank provided by the embodiment of the present application;

[0017] Figure 3 is an exploded schematic diagram of the driven easy-to-disassemble tool shank provided by the embodiment of the present application;

[0018] Figure 4 is a partial-structure exploded schematic diagram of the driven easy-to-disassemble tool shank provided by the embodiment of the present application Figure 1 ;

[0019] Figure 5 is a partial-structure exploded schematic diagram of the driven easy-to-disassemble tool shank provided by the embodiment of the present application Figure 2 ;

[0020] Figure 6 is a structural schematic diagram of the gland of the driven easy-to-disassemble tool shank provided by the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] Please refer to Figure 1 , the embodiment of the present application provides a driven easy-to-disassemble tool shank, which comprises a tool shank body 1, a gland 2, an elastic collet 3, a cutting tool 4, a driven shaft body 5, a driving wheel 6, a first bearing 7 and a second bearing 8 and other components. The following will make a detailed description of each component of the present embodiment in combination with the drawings.

[0023] As Figure 1 and Figure 2As shown, one end of the tool holder body 1 is open and has an inner cavity 10 recessed inward. The upper end of the pressure cap 2 is open and fixedly placed at the opening position of the inner cavity 10. A hollow cavity 20 is formed between the tool holder body 1 and the pressure cap 2. The upper and lower ends of the driven shaft 5 are rotatably installed in the hollow cavity 20 through the first bearing 7 and the second bearing 8. An axial channel 21 is opened in the middle of the lower end of the pressure cap 2, which connects to the upper end opening. The inner wall of the center hole at the top of the driven shaft 5 is provided with an internal thread 51. The threaded connector 31 connected to the tail of the elastic collet 3 passes through the axial channel 21 and the bottom opening of the driven shaft 5 and is threadedly connected to the internal thread 51 at its top. The cutting tool 4 is inserted into the clamping part 32 of the elastic collet 3.

[0024] like Figure 5 As shown, specifically, the outer wall of the middle part of the driven shaft 5 can be provided with a crown tooth 52. The driving wheel 6 has four teeth that pass through the corresponding insertion holes 11 on the tool holder body 1 at intervals, so that its bevel teeth 61 mesh with the crown teeth 52 of the driven shaft 5. The nut parts of the four driving wheels 6 can be rotatably inserted into the insertion holes 11 and exposed on the outer wall of the tool holder body 1.

[0025] Specifically, the hollow cavity 20 formed between the tool holder body 1 and the pressure cap 2 provides good support for the driven shaft 5. The meshing design between the crown tooth 52 of the driven shaft 5 and the bevel tooth 61 of the drive wheel 6 ensures the stability of the transmitted torque. The surrounding distribution of the four drive wheels 6 can evenly distribute the load, reduce concentrated stress, and enhance the stability of torque transmission. The tail of the elastic collet 3 is connected to the internal thread 51 of the driven shaft 5 through the threaded joint 31, making installation and disassembly very convenient. The operator can complete the installation and disassembly simply by rotating it.

[0026] The nut portion 62 of the drive wheel 6 can be configured as a cross-shaped nut, a slotted nut, or a polygonal nut. In this embodiment, a hexagonal nut is preferred as it can withstand higher torque. The specific implementation can be selected as needed, and this embodiment does not limit it.

[0027] In practice, the operator uses a hex wrench to turn the nut part of each drive wheel 6. Since the bevel tooth part 61 of each drive wheel 6 meshes with the crown tooth part 52 of the driven shaft 5, the driven shaft 5 can be driven to rotate synchronously when rotated, thereby pulling the elastic collet 3 inward. While being pulled inward, the elastic collet 3 can retract and hold the cutting tool 4 tightly.

[0028] like Figure 3 and Figure 4As shown, the clamping part 32 of the elastic collet 3 can be provided in a conical frustum structure, and the bottom of the clamping part 32 of the elastic collet 3 is inwardly recessed to provide a clamping hole 321 for inserting the cutting tool 4, and a plurality of expansion joints 322 are provided on the outer wall of the clamping part 32 of the elastic collet 3 along the length direction thereof and surround the clamping hole 321.

[0029] The clamping hole 321 can firmly fix the cutting tool 4 in the elastic collet 3 and also provide accurate positioning, thereby reducing the deviation and vibration of the cutting tool 4, and the expansion joints 322 can reduce the stress concentration of the elastic collet 3 during clamping, so that the tool replacement is more convenient and fast without excessive force or complex operation.

[0030] In the embodiment, the first bearing 7 and the second bearing 8 can be respectively provided as a first roller group and a second roller group, and the first roller group and the second roller group are respectively composed of a plurality of rollers, which are provided as spherical or cylindrical rollers, preferably steel spherical rollers. By dispersing the friction force to a plurality of rollers, the sliding wear can be reduced, the vibration and resonance phenomenon can be reduced, and the service life of the driven shaft body 5 can be prolonged.

[0031] Preferably, the outer side wall of the upper portion of the driven shaft body 5 can be outwardly protruded with a first annular eave 53, the inner wall of the inner cavity 10 of the tool handle body 1 is protruded with a first annular limiting part 101, and the first roller group is movably arranged between the first annular limiting part 101 and the first annular eave 53.

[0032] As shown, Figure 6 The bottom outer side wall of the driven shaft body 5 can be outwardly protruded with a second annular eave 54, the top inner end face of the gland 2 is recessed with a second annular limiting part 22, and the second roller group is movably arranged between the second annular eave 54 and the second annular limiting part 22.

[0033] In the embodiment, the first sealing ring 91 and the second sealing ring 92 can also be included, the first annular mounting groove 55 is provided on the top outer wall surface of the driven shaft body 5, the first sealing ring 91 is sleeved on the first annular mounting groove 55, the top inner end face of the gland 2 is recessed with a second annular mounting groove 23, and the second sealing ring 92 is embedded in the second annular mounting groove 23 and located on the bottom surface of the driven shaft body 5.

[0034] Furthermore, a plurality of third sealing rings 93 can also be included, and the third sealing rings 93 are respectively embedded in the third annular mounting grooves 12 on the inner walls of each insertion hole 11 of the tool handle body 1.

[0035] Specifically, the first sealing ring 91, the second sealing ring 92 and the third sealing ring 93 effectively prevent dust, moisture and other external substances from entering the hollow inner cavity 20, so as to protect the components such as the driven shaft body 5 and the driving wheel 6 inside, and improve the stability of the cutting tool 4 during use, reduce vibration and influence, and improve machining precision.

[0036] In summary, the utility model discloses a multi-point drive structure of torque transmission and convenient thread connection, the surrounding distribution of four driving wheels can evenly disperse load, reduce concentrated stress, enhance the stability of torque transmission, and thread connection makes installation and dismounting become easy to dismount convenient, and operating personnel only need to rotate to complete dismounting, significantly improve the clamping replacement efficiency, save time and effort, reduce downtime, and greatly improve overall production efficiency.

[0037] The above embodiment is the preferred implementation of the utility model, but the implementation of the utility model is not limited by the above embodiment, and any change, modification, replacement, combination, simplification, which does not deviate from the spirit and principle of the utility model, should be an equivalent replacement mode, and all are included in the protection scope of the utility model.

Claims

1. A slave quick detachable tool holder characterized by: The utility model provides a cutting tool handle, including handle body (1), gland (2), elastic collet (3), cutting tool (4), driven shaft body (5), driving wheel (6), first bearing (7) and second bearing (8), one end of handle body (1) is open and is inwardly recessed with inner chamber (10), the upper end of gland (2) is open and fixed cover is arranged at the open position of inner chamber (10), hollow cavity (20) is formed between handle body (1) and gland (2), the upper and lower ends of driven shaft body (5) are rotatably installed in hollow cavity (20) through first bearing (7) and second bearing (8), the lower end middle part of gland (2) is provided with axial passage (21) that communicates its upper end opening, the inner wall of the top center hole of driven shaft body (5) is provided with internal thread (51), the threaded joint (31) of elastic collet (3) tail connection passes through axial passage (21) and is connected with the internal thread (51) of the top of driven shaft body (5) after the bottom opening, cutting tool (4) is inserted at the clamping site (32) of elastic collet (3), the outer wall of the middle part of driven shaft body (5) is provided with crown tooth portion (52) around, driving wheel (6) is provided with four and is respectively spaced and is inserted through the corresponding insertion hole (11) of handle body (1) around to make its umbrella tooth portion (61) with the crown tooth portion (52) of driven shaft body (5) is engaged, the nut site (62) of four driving wheels (6) is rotatably inserted in insertion hole (11) and is exposed on the outer wall of handle body (1), by rotating the nut site (62) of each driving wheel (6) can drive driven shaft body (5) synchronous rotation, to realize the elastic collet (3) to be pulled inwards tightly, and the elastic collet (3) can contract and hold tightly cutting tool (4) when being pulled in.

2. A detachable tool holder according to claim 1, characterized in that: The clamping site (32) of the elastic collet (3) is provided in a conical frustum structure, the bottom of the clamping site (32) of the elastic collet (3) is inwardly recessed with a holding hole (321) for inserting the cutting tool (4), and a plurality of expansion joints (322) are provided on the outer wall of the clamping site (32) of the elastic collet (3) along the length direction thereof and are in communication with the holding hole (321).

3. A detachable tool holder according to claim 1, characterized in that: The first bearing (7) and the second bearing (8) are respectively provided as a first roller group and a second roller group, the first roller group and the second roller group are respectively composed of a plurality of rollers, and the rollers are provided in a spherical shape or a cylindrical shape.

4. A detachable tool holder according to claim 3, characterized in that: The upper outer side wall of the driven shaft body (5) is outwardly convex with a first annular convex eave (53), the inner wall of the inner chamber (10) of the handle body (1) is convex with a first annular limiting portion (101), and the first roller group is movably arranged between the first annular limiting portion (101) and the first annular convex eave (53).

5. A detachable tool holder according to claim 3, characterized in that: The bottom outer side wall of the driven shaft body (5) is outwardly convex with a second annular convex eave (54), the top inner end surface of the gland (2) is concave with a second annular limiting portion (22), and the second roller group is movably arranged between the second annular convex eave (54) and the second annular limiting portion (22).

6. A detachable tool holder according to claim 1, characterized in that: Further comprise a first sealing ring (91) and a second sealing ring (92), the driven shaft body (5) top outer wall surface is provided with a first annular mounting groove (55), the first sealing ring (91) is sleeved on the first annular mounting groove (55), the top inner end surface of the gland (2) is concave and is provided with a second annular mounting groove (23), the second sealing ring (92) is embedded in the second annular mounting groove (23) and located at the bottom surface of the driven shaft body (5).

7. A detachable tool holder according to claim 1, characterized in that: Further comprise several third sealing rings (93), the third sealing ring (93) is embedded in the third annular mounting groove (12) on the inner wall of each insertion hole (11) of the shank body (1) respectively.

8. A detachable tool holder according to claim 1, characterized in that: The screw cap part (62) of the driving wheel (6) is provided as a cross-shaped screw cap, a linear-shaped screw cap or a polygonal screw cap.

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