阅读说明：本技术 一种刀柄回转平浮夹持机构 (Cutter handle rotary flat-floating clamping mechanism ) 是由 吕曙光 刘斌 邹飞 孙建军 于 2021-08-31 设计创作，主要内容包括：本申请提供一种刀柄回转平浮夹持机构,包括：安装壳体,设置在安装壳体内且内部中空的回转轴,同轴安装在回转轴一端的夹头外套,设置在夹头外套内且用于夹持工件的夹头；其中,回转轴内沿轴向设有打刀杆,打刀杆一端与夹头远离工件一端固定连接；打刀杆用于驱动夹头伸入或伸出夹头外套。本申请提供一种刀柄回转平浮夹持机构,便于驱动夹头伸入或伸出,便于工件的安装和更换,提高了生产效率。(The application provides a handle of a knife gyration floating fixture, includes: the clamping head device comprises an installation shell, a hollow rotating shaft arranged in the installation shell, a clamping head outer sleeve coaxially arranged at one end of the rotating shaft, and a clamping head arranged in the clamping head outer sleeve and used for clamping a workpiece; wherein, a cutter beating rod is axially arranged in the rotating shaft, and one end of the cutter beating rod is fixedly connected with one end of the chuck far away from the workpiece; the knife striking rod is used for driving the chuck to extend into or out of the chuck outer sleeve. The application provides a handle of a knife gyration floating fixture, the drive chuck of being convenient for stretches into or stretches out, and the installation and the change of the work piece of being convenient for have improved production efficiency.)

1. The utility model provides a handle of a knife gyration floating fixture which characterized in that includes:

a mounting case (1);

a rotating shaft (2) which is arranged in the mounting shell (1) and is hollow inside;

the clamping head outer sleeve (3) is coaxially arranged at one end of the rotating shaft (2);

the chuck (4) is arranged in the chuck outer sleeve (3) and is used for clamping a workpiece (5);

a screwdriver rod (6) is axially arranged in the rotating shaft (2), and one end of the screwdriver rod (6) is fixedly connected with one end, far away from the workpiece (5), of the chuck (4); the screwdriver rod (6) is used for driving the chuck (4) to extend into or out of the chuck outer sleeve (3).

2. The rotary horizontal floating clamping mechanism for the tool shank according to claim 1, wherein a tool pulling rod (7) is arranged between the tool beating rod (6) and the chuck (4); draw on the cutter arbor (7) lateral wall fixed mounting have locking mechanism (8), locking mechanism (8) with install spring (9) between chuck overcoat (3) tip.

3. The shank rotating floating clamping mechanism according to claim 1, wherein the collet (4) comprises:

the chuck body (10) is of a tubular structure and is provided with a central axis;

the clamping part (11) is arranged at one end of the chuck main body (10) and comprises a plurality of claw pieces (12) distributed along the circumference, and mounting holes (28) for mounting the workpiece are formed among the claw pieces (12);

wherein the free ends of the claw members (12) are convergent towards the central axis or divergent away from the central axis to enable the gripping portion (11) to grip or release the workpiece (5).

4. The rotary flat-floating tool shank clamping mechanism is characterized in that a sliding hole (13) is formed in one end, close to the clamping portion (11), of the chuck body (10) in the radial direction, and the sliding hole (13) is communicated with the mounting hole (28);

a positioning pin shaft (14) is arranged in the chuck outer sleeve (3); and the positioning pin shaft (14) is inserted into the sliding hole (13) and is used for axially positioning the end part of the workpiece (5).

5. The rotary horizontal floating clamping mechanism for the tool shank according to claim 1, wherein a horizontal floating mechanism is arranged between the chuck outer sleeve (3) and the rotary shaft (2).

6. The shank rotating, flat-floating and clamping mechanism of claim 5, wherein the flat-floating mechanism comprises:

an input shaft (15) and an output end cover (16) which are hollow inside and are arranged coaxially with the rotating shaft (2); the input shaft (15) is fixedly connected with the rotating shaft (2), and the output end cover (16) is fixedly connected with the end part of the chuck outer sleeve (3);

a first annular slider (17) disposed within said input shaft (15) and connected to said input shaft (15) by a pair of first floating pins (18) extending in a first radial direction;

the second annular floating block (19) is arranged in the output end cover (16) and is connected with the output end cover (16) through a pair of second floating pin shafts (20) extending along a second radial direction;

a connecting member (21) connected to the first annular slider (17) by a pair of third floating pins (22) extending in a third radial direction; the second floating pin shaft is connected with the second annular floating block (19) through a pair of fourth floating pin shafts (23) extending along a fourth radial direction;

wherein the first radial direction is parallel to the second radial direction, the third radial direction is parallel to the fourth radial direction, and the first radial direction is perpendicular to the third radial direction.

7. The rotary floating clamping mechanism for the tool shank according to claim 6, wherein a weight-reducing groove or a weight-reducing hole (24) is formed in the connecting piece (21).

8. The rotary flat-floating clamping mechanism for the tool shank according to any one of claims 1 to 7 is characterized in that a driving gear (25) for driving the rotary shaft (2) to rotate is arranged at one end, away from the chuck outer sleeve (3), of the rotary shaft.

9. The rotary flat-floating clamping mechanism for the tool shank according to any one of claims 1 to 7 is characterized in that a guide cover (26) is fixedly arranged on one side of the mounting shell (1), and the chuck outer sleeve (3) is arranged in the guide cover (26); and one side of the guide cover (26) far away from the mounting shell (1) is provided with a mounting opening through which the chuck (4) can extend.

10. The rotary flat-floating clamping mechanism for the tool shank according to claim 9, characterized in that a sealing ring (27) is arranged between the chuck outer sleeve (3) and the guide cover (26).

Technical Field

The disclosure generally relates to the technical field of grinding machine processing, in particular to a tool shank rotating flat-floating clamping mechanism.

Background

The tool shank clamping mechanism is used for clamping a tool and is connected with an external rotating shaft, so that the tool can be driven to rotate, and a workpiece is machined;

in the use process, when the cutter damages or needs to process different models of workpieces, the cutter needs to be taken down for replacement, and in the prior art, the cutter replacement is inconvenient, the cutter replacement time is long, the replacement efficiency is low, and the processing production efficiency is seriously influenced.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a tool holder rotary floating clamping mechanism capable of solving the above-mentioned technical problems, comprising:

installing a shell;

the rotating shaft is arranged in the mounting shell and is hollow inside;

the clamping head outer sleeve is coaxially arranged at one end of the rotating shaft;

the chuck is arranged in the chuck outer sleeve and used for clamping a workpiece;

a cutter bar is axially arranged in the rotating shaft, and one end of the cutter bar is fixedly connected with one end of the chuck far away from the workpiece; the knife striking rod is used for driving the chuck to extend into or out of the chuck outer sleeve.

According to the technical scheme provided by the embodiment of the application, a draw knife rod is arranged between the striking knife rod and the chuck; and a locking mechanism is fixedly arranged on the side wall of the broach rod, and a spring is arranged between the locking mechanism and the end part of the chuck outer sleeve.

According to the technical scheme provided by the embodiment of the application, the chuck comprises:

the chuck body is of a tubular structure and is provided with a central axis;

the clamping part is arranged at one end of the chuck main body and comprises a plurality of claw pieces distributed along the circumference; mounting holes for mounting the workpiece are formed among the claw pieces;

wherein the free ends of the jaw members are convergent toward the central axis or divergent away from the central axis to enable the gripping portion to grip or release the workpiece.

According to the technical scheme provided by the embodiment of the application, one end, close to the clamping part, of the chuck main body is provided with a sliding hole along the radial direction, and the sliding hole is communicated with the mounting hole;

a positioning pin shaft is arranged in the chuck outer sleeve; and the positioning pin shaft is inserted into the sliding hole and is used for axially positioning the end part of the workpiece.

According to the technical scheme provided by the embodiment of the application, a horizontal floating mechanism is arranged between the chuck outer sleeve and the rotating shaft.

According to the technical scheme provided by the embodiment of the application, the horizontal floating mechanism comprises:

the hollow input shaft and the hollow output end cover are arranged coaxially with the rotating shaft; the input shaft is fixedly connected with the rotating shaft, and the output end cover is fixedly connected with the end part of the chuck outer sleeve;

the first annular floating block is arranged in the input shaft and is connected with the input shaft through a pair of first floating pin shafts extending out along a first radial direction;

the second annular floating block is arranged in the output end cover and is connected with the output end cover through a pair of second floating pin shafts extending out along a second radial direction;

the connecting piece is connected with the first annular floating block through a pair of third floating pin shafts extending along a third radial direction; the second floating pin shaft is connected with the second annular floating block through a pair of fourth floating pin shafts extending along a fourth radial direction;

wherein the first radial direction is parallel to the second radial direction, the third radial direction is parallel to the fourth radial direction, and the first radial direction is perpendicular to the third radial direction.

According to the technical scheme provided by the embodiment of the application, the connecting piece is provided with a weight-reducing groove or a weight-reducing hole.

According to the technical scheme provided by the embodiment of the application, one end, far away from the chuck outer sleeve, of the rotating shaft is provided with a driving gear for driving the rotating shaft to rotate.

According to the technical scheme provided by the embodiment of the application, a guide cover is fixedly arranged on one side of the installation shell, and the chuck outer sleeve is arranged in the guide cover; and one side of the guide cover, which is far away from the mounting shell, is provided with a mounting opening through which the chuck can extend.

According to the technical scheme provided by the embodiment of the application, a sealing ring is arranged between the chuck outer sleeve and the guide cover.

The beneficial effect of this application lies in: in the using process, the cutter bar can be pushed, so that the chuck extends out of the end part of the chuck outer sleeve; installing the workpiece on the chuck, and driving the cutter beating rod to move reversely, so that the chuck extends into the chuck outer sleeve; at the moment, the revolving shaft is driven to rotate, the revolving shaft drives the chuck outer sleeve to rotate, and further the chuck clamping the workpiece can be driven to rotate, so that the machining operation is carried out.

In the structure, the screwdriver rod is arranged, so that the driving chuck can conveniently stretch into or stretch out of the chuck outer sleeve, the workpiece is convenient to install or replace, and the production efficiency is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic cross-sectional structural view of a rotary floating clamping mechanism of a tool holder provided by the present application;

FIG. 2 is a schematic structural view of the rotary floating clamping mechanism of the tool holder shown in FIG. 1;

fig. 3 is a schematic view of the internal mounting structure of the mounting case 1 shown in fig. 2;

FIG. 4 is a schematic view of the mounting structure of the input shaft 15 and the output end cover 16 shown in FIG. 3;

FIG. 5 is a cross-sectional structural view of the input shaft 15 shown in FIG. 4;

fig. 6 is a schematic structural view of the chuck 4 shown in fig. 1.

1. Installing a shell; 2. a rotating shaft; 3. a chuck outer sleeve; 4. a chuck; 5. a workpiece; 6. punching a cutter rod; 7. pulling a cutter rod; 8. a locking mechanism; 9. a spring; 10. a chuck body; 11. a clamping portion; 12. a claw member; 13. a slide hole; 14. positioning a pin shaft; 15. an input shaft; 16. an output end cover; 17. a first annular slider; 18. a first floating pin shaft; 19. a second annular slider; 20. a second floating pin shaft; 21. a connecting member; 22. a third floating pin shaft; 23. a fourth floating pin shaft; 24. lightening holes; 25. a drive gear; 26. a guide cover; 27. a seal ring; 28. and (7) installing holes.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

Please refer to fig. 1 and 2, which illustrate a rotary floating clamping mechanism for a tool holder according to the present application, comprising

Installing the shell 1;

a rotation shaft 2 which is provided in the installation case 1 and has a hollow interior;

the clamping head outer sleeve 3 is coaxially arranged at one end of the rotating shaft 2;

the chuck 4 is arranged in the chuck outer sleeve 3 and used for clamping a workpiece 5;

a screwdriver rod 6 is axially arranged in the rotating shaft 2, and one end of the screwdriver rod 6 is fixedly connected with one end of the chuck 4 far away from the workpiece 5; the striking rod 6 is used for driving the chuck 4 to extend into or out of the chuck outer sleeve 3.

Specifically, the rotating shaft 2 is mounted in the mounting housing 1 through a bearing; the workpiece is a cutter.

Preferably, the length of the displacement path of the cutter bar 6 is 1 mm;

the working principle is as follows: in the using process, the cutter bar 6 can be pushed, so that the chuck 4 extends out of the end part of the chuck outer sleeve 3; installing the workpiece 5 on the chuck 4, and driving the screwdriver rod 6 to move reversely, so that the chuck 4 extends into the chuck outer sleeve 3; at this time, the rotating shaft 2 is driven to rotate, the rotating shaft 2 drives the chuck outer sleeve 3 to rotate, and further drives the chuck 4 which clamps the workpiece 5 to rotate, so that the machining operation is carried out.

In the structure, the driving chuck 4 which can be very convenient extends into or out of the chuck outer sleeve 3 by arranging the screwdriver rod 6, so that the workpiece 5 is convenient to install or replace, and the production efficiency is improved.

Preferably, a draw bar 7 is arranged between the striking bar 6 and the chuck 4; a locking mechanism 8 is fixedly mounted on the side wall of the broach rod 7, and a spring 9 is mounted between the locking mechanism 8 and the end part of the chuck outer sleeve 3.

Specifically, the locking mechanism 8 may be a nut mounted on the broaching bar 7, and preferably, there are two nuts; the spring 9 is arranged between the end part of the chuck outer sleeve 3 and the side wall of the nut.

Specifically, the spring 9 is a coil spring or a belleville spring; when the clamping head 4 is driven to extend by the cutter bar 6, the pressure applied on the spring 9 is larger than 700N.

Through setting up spring 9 for work as chuck 4 stretches out chuck overcoat 3 and will work piece 5 is installed behind chuck 4, draw the cutter arbor 7 to contract under the effect of spring 9, need not drive with the help of external force chuck 4 stretches into in the chuck overcoat 3. Meanwhile, the locking mechanism 8 and the chuck outer sleeve 3 play a role in positioning the broach rod 7.

Preferably, as shown in fig. 6, the chuck 4 includes:

a chuck body 10 having a tubular configuration with a central axis;

a clamping part 11, which is arranged at one end of the chuck main body 10 and comprises a plurality of claw pieces 12 distributed along the circumference; a mounting hole 28 for mounting the workpiece is formed between the claw members 12;

wherein the free ends of the jaw members 12 are convergent towards the central axis or divergent away from the central axis to enable the gripping portion 11 to grip or release the workpiece 5.

Preferably, three claw members 12 are uniformly distributed along the circumference;

specifically, the chuck outer sleeve 3 is provided with through holes for the chuck 4 to extend into or out of, when the clamping jaws 12 on the chuck 4 extend out of the through holes, the clamping jaws 12 are separated from the central axis, and gaps among the clamping jaws are enlarged; when the clamping jaws 12 on the chuck 4 enter the through opening, the diameter of the through opening is limited, the clamping jaws 12 converge towards the central axis, and the gaps between the clamping jaws gradually decrease until the clamping jaws 12 clamp the workpiece 5, namely, the diameter of the through opening is equal to the diameter of the clamping part 11 when the clamping jaws 12 converge.

Preferably, a sliding hole 13 is formed in the chuck body 10 and at one end close to the clamping portion 11 in the radial direction, and the sliding hole 13 is communicated with the mounting hole 28;

a positioning pin shaft 14 is arranged in the chuck outer sleeve 3; the positioning pin shaft 14 is inserted into the sliding hole 13 and used for axially positioning the end part of the workpiece 5.

Specifically, the positioning pin 14 is fixedly installed in the chuck outer sleeve 3; by arranging the positioning pin shaft 14 and the sliding hole 13, the following steps are performed:

1. the chuck 4 is limited, and when the chuck 4 extends out of the chuck outer sleeve 3, the positioning pin 14 is abutted against one side of the sliding hole 13, so that the chuck cannot extend out continuously; when the chuck 4 extends into the chuck outer sleeve 3, the positioning pin 14 abuts against the other side of the sliding hole 13, so that the chuck cannot be continuously contracted.

2. The workpiece 5 is positioned, when the chuck 4 extends out of the chuck outer sleeve 3, the workpiece 5 can be inserted into the chuck 4 through the mounting hole 28, and meanwhile, the end part of the workpiece 4 is kept in contact with the side wall of the positioning pin shaft 14, so that the position consistency of the workpiece 5 can be ensured, and the tool setting error is ensured to be within 0.02 mm.

Preferably, a driving gear 25 for driving the rotation shaft 2 to rotate is arranged at one end of the rotation shaft 2 away from the chuck outer sleeve 3.

Preferably, the drive gear 25 is a 90 ° bevel gear.

Preferably, a guide cover 26 is fixedly installed on one side of the installation shell 1, and the chuck outer sleeve 3 is arranged in the guide cover 26; the side of the guide cover 26 away from the mounting housing 1 is provided with a mounting opening through which the chuck 4 can extend.

Preferably, one side of the guide cover 26 close to the mounting opening is a conical surface, and the fitting degree of the conical surface and the outer side wall of the chuck outer sleeve 3 is more than or equal to 75%.

Preferably, a sealing ring 27 is disposed between the chuck outer sleeve 3 and the guide cover 26.

Preferably, two sealing rings 27 are provided and are sleeved between the chuck outer sleeve 3 and the guide cover 26.

Example 2

In this embodiment, a floating mechanism is provided between the collet housing 3 and the rotating shaft 2 based on embodiment 1.

Preferably, as shown in fig. 3 to 5, the horizontal floating mechanism includes:

an input shaft 15 and an output end cover 16, both of which are hollow inside, and are arranged coaxially with the rotation shaft 2; the input shaft 15 is fixedly connected with the rotating shaft 2, and the output end cover 16 is fixedly connected with the end part of the chuck outer sleeve 3;

a first annular slider 17 disposed within the input shaft 15 and connected to the input shaft 15 by a pair of first floating pins 18 extending in a first radial direction;

a second annular slider 19 disposed inside the output end cap 16 and connected to the output end cap 16 by a pair of second floating pins 20 extending in a second radial direction;

a connecting member 21 connected to the first annular slider 17 via a pair of third floating pins 22 extending in a third radial direction; the second floating pin shaft 23 is connected with the second annular floating block 19 through a pair of fourth floating pin shafts extending along a fourth radial direction;

wherein the first radial direction is parallel to the second radial direction, the third radial direction is parallel to the fourth radial direction, and the first radial direction is perpendicular to the third radial direction.

Specifically, the outer walls of the first annular floating block 17 and the input shaft 15 are provided with first pin shaft holes for mounting the first floating pin shaft 18; a second pin shaft hole for mounting the second floating pin shaft 20 is formed in the outer walls of the second annular floating block 19 and the output end cover 16; a third pin shaft hole for mounting the third floating pin shaft 22 is formed in the outer walls of the connecting piece 21 and the first annular floating block 17; a fourth pin shaft hole for mounting the fourth floating pin shaft 23 is formed in the outer walls of the connecting piece 21 and the second annular floating block 19;

preferably, the first floating pin 18, the second floating pin 20, the third floating pin 22, and the fourth floating pin 23 are made of tungsten steel.

Preferably, the sliding fit clearance between the pin shaft hole and the pin shaft is less than or equal to 5 um.

Specifically, the input shaft 15, the output end cover 16, the first annular floating block 17 and the second annular floating block 19 are hollow, so that an installation space is provided for the cutter bar 6 and the cutter drawing bar 7;

in the above structure, since the first radial direction is parallel to the second radial direction, the third radial direction is parallel to the fourth radial direction, and the first radial direction is perpendicular to the third radial direction; therefore, the first annular floating block 17, the pair of first floating pin shafts 18 and the pair of third floating pin shafts 22 on the first annular floating block form a first cross structure together, and the first cross structure enables the input shaft 15 to swing up, down, left and right relative to the connecting piece 21; the second annular floating block 19, a pair of second floating pin shafts 20 and a pair of fourth floating pin shafts 23 on the second annular floating block form a second cross-shaped structure; the second cross-shaped structure enables the output end cover 16 to swing up, down, left and right relative to the connecting piece 21; two cross structures constitute a "two cross" structures jointly, have consequently realized two swings, and output end cover 16 can do the horizontal floating movement for input shaft 15 promptly, and then makes output end cover 16 drive anchor clamps subassembly and do the horizontal floating movement for input shaft 15, when the machine external positioning, can eliminate the axle clearance, and the rigidity is strong, and stability is good.

Preferably, the connecting member 21 is provided with a lightening slot or lightening hole 24.

Through setting up lightening groove or lightening hole 24 for reduced the structure dead weight, avoided the output to receive self weight influence and make the terminal perk of work piece rotation in-process, improved the stability of processing.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.