阅读说明：本技术 一种双十字结平浮机构及加工机床 (Double-cross-knot flat floating mechanism and processing machine tool ) 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：本申请提供一种双十字结平浮机构及加工机床,平浮机构包括：输入轴和输出端盖,第一环形浮动块,第二环形浮动块、连接件；第一环形浮动块与输入轴之间通过一对沿第一径向方向伸出的第一浮动销轴连接；第二环形浮动块与输出端盖之间通过一对沿第二径向方向伸出的第二浮动销轴连接；连接件与第一环形浮动块通过一对沿第三径向方向伸出的第三浮动销轴连接；连接件与第二环形浮动块之间通过一对沿第四径向方向伸出的第四浮动销轴连接；第一径向方向与第二径向方向平行,第三径向方向与第四径向方向平行,第一径向方向与第三径向方向垂直。双十字结平浮机构使得输出端盖相对于输入轴可以做平浮运动,消除了轴间隙,刚性强,稳定性好。(The application provides two cross knot flat floating mechanism and machine tool, flat floating mechanism includes: the connecting device comprises an input shaft, an output end cover, a first annular floating block, a second annular floating block and a connecting piece; the first annular floating block is connected with the input shaft through a pair of first floating pin shafts extending along a first radial direction; the second annular floating block 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 out along a third radial direction; the connecting piece is connected with the second annular floating block through a pair of fourth floating pin shafts extending out along a fourth radial direction; 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. The double-cross-shaped-joint flat floating mechanism enables the output end cover to do flat floating movement relative to the input shaft, shaft gaps are eliminated, and the double-cross-shaped-joint flat floating mechanism is strong in rigidity and good in stability.)

1. The utility model provides a two cross knot flat floating mechanism which characterized in that includes:

the input shaft (1) and the output end cover (2) are hollow inside and are coaxially arranged;

the first annular floating block (3) is arranged in the input shaft (1) and is connected with the input shaft (1) through a pair of first floating pin shafts (4) extending along a first radial direction;

the second annular floating block (5) is arranged in the output end cover (2) and is connected with the output end cover (2) through a pair of second floating pin shafts (6) extending along a second radial direction;

the connecting piece (7) is connected with the first annular floating block (3) through a pair of third floating pin shafts (8) extending along a third radial direction; the second floating pin shaft is connected with the second annular floating block (5) through a pair of fourth floating pin shafts (9) 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.

2. A double cross tie float mechanism according to claim 1, wherein said connecting piece (7) has two connecting portions and a fixed portion (10) between said two connecting portions;

the two connecting parts are respectively a first connecting part (11) connected with one end of a third floating pin shaft (8) and one end of a fourth floating pin shaft (9), and a second connecting part (12) connected with the other end of the third floating pin shaft (8) and the other end of the fourth floating pin shaft (9).

3. The double cross knot float mechanism of claim 2,

and a lightening groove or lightening hole (13) is formed in one side, far away from the fixed part (10), of the connecting part and is positioned between the third floating pin shaft (8) and the fourth floating pin shaft (9).

4. The double-cross flat floating mechanism according to claim 2, wherein a first hollowed-out opening is formed in the side wall of the end portion of the input shaft (1) along a third radial direction, and a second hollowed-out opening is formed in the side wall of the output end along a fourth radial direction;

the first hollowed-out opening and the second hollowed-out opening are communicated with each other to form an assembly space for mounting the connecting piece (7).

5. The double-cross flat floating mechanism according to claim 4, wherein a first groove (14) is formed in the first hollowed-out edge in a direction close to the first floating pin (4); a second groove (15) extends from the edge of the second hollow-out hole to the direction close to the second floating pin shaft (6);

the first groove (14) and the second groove (15) are arc-shaped grooves.

6. A double cross tie float mechanism according to claim 5,

third grooves (16) are formed in the side walls of the connecting part, which are positioned at two sides of the third floating pin shaft (8); fourth grooves (17) are formed in the side walls of the connecting part, which are positioned at two sides of the fourth floating pin shaft (9);

the third groove (16) and the fourth groove (17) are arc-shaped grooves.

7. A double cross tie floating mechanism according to claim 4, wherein a first gap is formed between the input shaft (1) and the output end cover (2); a second gap is formed between one side edge of the first hollow opening, which is far away from the input shaft (1), and the connecting piece (7); and a third gap is formed between one side edge of the second hollow opening, which is far away from the output end cover (2), and the connecting piece (7).

8. A double cross tie float mechanism as claimed in claim 7 wherein said first gap is 0.1-mm; the second gap is 0.1-2 mm; the third gap is 0.1-2 mm.

9. A machine tool comprising a machine tool body, a rotating shaft mounted on said machine tool, a collet and a double cross tie float mechanism according to any one of claims 1 to 8;

the rotary shaft is coaxially and fixedly connected with the input shaft (1), the chuck is fixedly connected with the output end cover (2), and a workpiece is arranged on the chuck.

Technical Field

The disclosure generally relates to the technical field of grinding machine processing equipment, in particular to a double-cross-shaped-node flat floating mechanism and a processing machine tool.

Background

In grinding machine machining apparatuses, there is usually a machining station for grooving a workpiece, which performs spiral grooving by rotating a tool at an output end, usually by cooperation of a rotary shaft and a bearing.

The weight of the cutter is higher due to the transmission of the bearing, and the output end is easily influenced by gravity to generate a couch in the process of driving the slotting, so that the tail end of the cutter is tilted in the rotating process, and the stability is poor; meanwhile, because a gap is formed between the bearings, and the inner structure and the outer structure of the bearings are in point contact through the balls, the rigidity is poor, and the precision is poor.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a double-cross-shaped-node flat floating mechanism and a processing machine tool, which can solve the above-mentioned technical problems.

The application provides in a first aspect a two cross knot horizontal floating mechanism, includes:

the input shaft and the output end cover are hollow and coaxially arranged inside;

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 two connecting parts and a fixing part positioned between the two connecting parts;

and the two connecting parts are respectively a first connecting part connected with one end of the third floating pin shaft and one end of the fourth floating pin shaft and a second connecting part connected with the other end of the third floating pin shaft and the other end of the fourth floating pin shaft.

According to the technical scheme provided by the embodiment of the application, the connecting part is far away from one side of the fixing part, and a weight reduction groove or a weight reduction hole is formed between the third floating pin shaft and the fourth floating pin shaft.

According to the technical scheme provided by the embodiment of the application, a first hollow-out opening is formed in the side wall of the end part of the input shaft along a third radial direction, and a second hollow-out opening is formed in the side wall of the output end along a fourth radial direction;

the first hollowed-out opening and the second hollowed-out opening are communicated with each other to form an assembly space for installing the connecting piece.

According to the technical scheme provided by the embodiment of the application, a first groove is formed in the first hollowed-out edge in a manner of extending towards the direction close to the first floating pin shaft; a second groove is formed in the second hollow-out edge in an extending mode in the direction close to the second floating pin shaft;

the first groove and the second groove are arc-shaped grooves.

According to the technical scheme provided by the embodiment of the application, the connecting part is provided with third grooves on the side walls of the connecting part, which are positioned at two sides of the third floating pin shaft; fourth grooves are formed in the side walls, located on two sides of the fourth floating pin shaft, of the connecting portion;

the third groove and the fourth groove are arc-shaped grooves.

According to the technical scheme provided by the embodiment of the application, a first gap is formed between the input shaft and the output end cover; a second gap is formed between one side edge of the first hollow opening, which is far away from the input shaft, and the connecting piece; and a third gap is formed between one side edge of the second hollow opening, which is far away from the output end cover, and the connecting piece.

According to the technical scheme provided by the embodiment of the application, the first gap is 0.1-2 mm; the second gap is 0.1-2 mm; the third gap is 0.1-2 mm.

According to the technical scheme provided by the embodiment of the application, cavities for reducing weight are arranged in the side walls of the input shaft and the output end cover.

The second aspect of the application provides a processing machine tool, which comprises a machine tool body, a rotating shaft arranged on the machine tool, a clamping head and a double-cross-shaped-joint flat floating mechanism with the structure;

the rotary shaft is coaxially and fixedly connected with the input shaft, the chuck is fixedly connected with the output end cover, and a workpiece is arranged on the chuck.

The beneficial effect of this application lies in: 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, the pair of first floating pin shafts and the pair of third floating pin shafts on the first annular floating block jointly form a first cross-shaped structure; the first cross structure enables the input shaft to swing up, down, left and right relative to the connecting piece; the second annular floating block, a pair of second floating pin shafts and a pair of fourth floating pin shafts on the second annular floating block form a second cross-shaped structure together; the second cross-shaped structure enables the output end cover to swing up, down, left and right relative to the connecting piece; two cross structures constitute a "two cross" structures jointly, have consequently realized two swings, and output end cover can be for the input shaft horizontal floating movement promptly, and then makes the anchor clamps subassembly that output end cover drove on it be horizontal floating movement for the input shaft, when the machine external positioning, can eliminate the axle clearance, and the rigidity is strong, and stability is good.

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 double-cross-shaped-knot horizontal floating mechanism provided by the application.

FIG. 2 is a schematic front view of the double-cross-shaped-knot horizontal floating mechanism shown in FIG. 1;

FIG. 3 is a side cross-sectional mounting structure schematic view of the first annular slider 3 shown in FIG. 1;

reference numbers in the figures:

1. an input shaft; 2. an output end cover; 3. a first annular slider; 4. a first floating pin shaft; 5. a second annular slider; 6. a second floating pin shaft; 7. a connecting member; 8. a third floating pin shaft; 9. a fourth floating pin shaft; 10. a fixed part; 11. a first connection portion; 12. a second connecting portion; 13. lightening holes; 14. a first groove; 15. a second groove; 16. a third groove; 17. a fourth groove;

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, which is a schematic diagram illustrating a double-cross-shaped structure of a floating mechanism, according to the present invention, including an input shaft 1 and an output end cap 2, which are hollow and coaxially disposed;

the first annular floating block 3 is arranged in the input shaft 1 and is connected with the input shaft 1 through a pair of first floating pin shafts 4 extending along a first radial direction;

the second annular floating block 5 is arranged in the output end cover 2 and is connected with the output end cover 2 through a pair of second floating pin shafts 6 extending along a second radial direction;

the connecting piece 7 is connected with the first annular floating block 3 through a pair of third floating pin shafts 8 extending along a third radial direction; the second floating pin shaft 9 is connected with the second annular floating block 5 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 3 and the input shaft 1 are provided with first pin shaft holes for mounting the first floating pin shaft 4; a second pin shaft hole for mounting the second floating pin shaft 6 is formed in the outer walls of the second annular floating block 5 and the output end cover 2; a third pin shaft hole for mounting the third floating pin shaft 8 is formed in the outer wall of the connecting piece 7 and the outer wall of the first annular floating block 3; a fourth pin shaft hole for mounting the fourth floating pin shaft 8 is formed in the outer walls of the connecting piece 7 and the second annular floating block 5;

preferably, the first floating pin 4, the second floating pin 6, the third floating pin 8 and the fourth floating pin 9 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.

The working principle is as follows:

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 3, the pair of first floating pin shafts 4 and the pair of third floating pin shafts 8 on the first annular floating block form a first cross structure together, and the first cross structure enables the input shaft 1 to swing up, down, left and right relative to the connecting piece 7; the second annular floating block 5, a pair of second floating pin shafts 6 and a pair of fourth floating pin shafts 9 on the second annular floating block form a second cross-shaped structure; the second cross-shaped structure enables the output end cover 2 to swing up, down, left and right relative to the connecting piece 7; two cross structures constitute a "two cross" structures jointly, have consequently realized two swings, and output end cover 2 can be for input shaft 1 flat floating movement promptly, and then makes output end cover 2 drive anchor clamps subassembly and be flat floating movement for input shaft 1, when the machine external positioning, can eliminate the axle clearance, and the rigidity is strong, and stability is good.

Preferably, the connecting piece 7 has two connecting parts and a fixing part 10 located between the two connecting parts;

the two connecting parts are respectively a first connecting part 11 connected with one end of the third floating pin shaft 8 and one end of the fourth floating pin shaft 9, and a second connecting part 12 connected with the other end of the third floating pin shaft 8 and the other end of the fourth floating pin shaft 9.

Preferably, a lightening groove or lightening hole 13 is formed in the connecting part, which is far away from the fixing part 10 and is located between the third floating pin 8 and the fourth floating pin 9.

Through setting up subtract heavy groove or lightening hole 13 for reducible the heavy burden of connecting portion avoids the output to receive self weight influence and makes the terminal perk of cutter rotation in-process, influences machining effect and processing stability.

Preferably, a first hollow-out opening is formed in the side wall of the end portion of the input shaft 1 along a third radial direction, and a second hollow-out opening is formed in the side wall of the output end along a fourth radial direction;

the first hollowed-out opening and the second hollowed-out opening are communicated with each other to form an assembly space for installing the connecting piece 7.

Through the arrangement of the first hollowed-out opening and the second hollowed-out opening, the assembling and mounting processes of the connecting piece 7 can be facilitated, and the structural volume and the structural weight are reduced.

Preferably, a first groove 14 is formed in the first hollowed-out edge in a direction close to the first floating pin shaft 4 in an extending manner; a second groove 15 extends from the edge of the second hollow-out hole to the direction close to the second floating pin shaft 6;

the first groove 14 and the second groove 15 are arc-shaped grooves.

The first groove 14 and the second groove 15 are arranged, so that the self weight of the structure can be reduced; the first groove 14 and the second groove 15 are arc-shaped grooves, so that the end part of the input shaft can be stressed evenly, and the structural strength is improved.

Preferably, third grooves 16 are formed in the side walls of the connecting part, which are located at two sides of the third floating pin shaft 8; fourth grooves 17 are formed in the side walls of the connecting part, which are positioned at two sides of the fourth floating pin shaft 9;

the third groove 16 and the fourth groove 17 are arc-shaped grooves.

The third groove 16 and the fourth groove 17 are arranged, so that the self weight of the structure can be reduced; the third groove 16 and the fourth groove 17 are arc-shaped grooves, so that the two ends of the connecting part can be stressed in a balanced manner, and the structural strength is improved.

Wherein, preferably, a first gap is formed between the input shaft 1 and the output end cover 2; a second gap is formed between one side edge of the first hollow opening, which is far away from the input shaft 1, and the connecting piece 7; and a third gap is formed between one side edge of the second hollow opening, which is far away from the output end cover 2, and the connecting piece 7.

Wherein, preferably, the first gap is 0.1-2 mm; the second gap is 0.1-2 mm; the third gap is 0.1-2 mm.

Example 2

The embodiment provides a processing machine tool, which comprises a machine tool body, a revolving shaft, a clamping head and a double-cross-shaped-joint flat floating mechanism, wherein the revolving shaft is arranged on the machine tool;

the rotary shaft is coaxially and fixedly connected with the input shaft 1, the chuck is fixedly connected with the output end cover 2, and a workpiece is arranged on the chuck.

Specifically, the workpiece is a cutter;

through the structure, the output end cover 2 can do horizontal floating motion relative to the input shaft 1, and then the output end cover 2 drives the clamp to do horizontal floating motion relative to the input shaft 1, so that the stability of the tool in the rotary machining process is improved, shaft gaps are eliminated, the rigidity is strong, and the stability is good

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.