阅读说明：本技术 一种工件固定治具 (Workpiece fixing jig ) 是由 陈志辉 于 2020-09-23 设计创作，主要内容包括：本发明公开了一种工件固定治具,通过在底座上竖向设置有轴套,轴套下端连接有第一驱动结构,轴套上端固定有固定座,固定座内部横向转动连接有转筒,转筒传动连接有传动轴,传动轴下端贯穿轴套且在轴套下方连接有第二驱动结构,转筒内部连接有转轴,转轴一端转动连接有伸缩结构,伸缩结构固定在固定座上,转轴另一端延伸至固定座外侧,工件固定在转轴上时,可以驱动工件以转轴的轴线为中心转动,以及以轴套的轴线为中心转动,适合对不同工件加工工艺的需求,提高抛光轮对工件的抛光效果；在转轴的一端设置通过伸缩结构驱动的卡爪,实现对工件的快速夹紧；传动轴穿插在轴套内部,转轴安装在固定座内部,结构紧凑,减少工件固定治具的体积。(The invention discloses a workpiece fixing jig, which is characterized in that a shaft sleeve is vertically arranged on a base, the lower end of the shaft sleeve is connected with a first driving structure, the upper end of the shaft sleeve is fixedly provided with a fixed seat, the inside of the fixed seat is transversely and rotatably connected with a rotary drum, the rotary drum is in transmission connection with a transmission shaft, the lower end of the transmission shaft penetrates through the shaft sleeve and is connected with a second driving structure below the shaft sleeve, the inside of the rotary drum is connected with a rotary shaft, one end of the rotary shaft is rotatably connected with a telescopic structure, the telescopic structure is fixed on the fixed seat, the other end of the rotary shaft extends to the outer side of the fixed seat, when a workpiece is fixed on the rotary shaft, the workpiece can be driven to rotate by; one end of the rotating shaft is provided with a clamping jaw driven by a telescopic structure, so that a workpiece is quickly clamped; the transmission shaft is inserted in the shaft sleeve, the rotating shaft is installed in the fixed seat, the structure is compact, and the size of the workpiece fixing jig is reduced.)

1. The utility model provides a tool is fixed to work piece, a serial communication port, including base (1), vertically on base (1) be provided with axle sleeve (2), axle sleeve (2) lower extreme is connected with first drive structure, axle sleeve (2) upper end is fixed with fixing base (5), fixing base (5) inside horizontal rotation is connected with rotary drum (6), rotary drum (6) transmission is connected with transmission shaft (11), transmission shaft (11) lower extreme runs through axle sleeve (2) and is connected with second drive structure below axle sleeve (2), rotary drum (6) inside sliding connection has pivot (10), pivot (10) one end is rotated and is connected with extending structure (4), extending structure (4) are fixed on fixing base (5), the pivot (10) other end extends to fixing base (5) outside.

2. The workpiece fixing jig is characterized in that the first driving structure comprises a first motor (18) and a first transmission assembly (14) in transmission connection with the first motor (18), the first motor (18) and the first transmission assembly (14) are fixed on the base (1), and the first transmission assembly (14) is connected with the shaft sleeve (2); the second driving structure comprises a second motor (19) and a second transmission assembly (16) in transmission connection with the second motor (19), the second motor (19) and the second transmission assembly are fixed on the base (1), and the second transmission assembly (16) is connected with the transmission shaft (11).

3. The jig for fixing work pieces according to claim 2, wherein the transmission shaft (11) is slidably connected to the first transmission member (14) and the second transmission member (16), and a bottom cover (21) is fixed to a lower end surface of the second transmission member (16), and the bottom cover (21) is provided with an adjusting screw (22) for adjusting the height position of the transmission shaft (11).

4. A workpiece holding jig as claimed in claim 3 characterised in that the first transmission assembly (14) and the second transmission assembly (16) are of worm and worm gear construction.

5. A workpiece holding jig as claimed in claim 3, characterised in that a first transmission structure (17) is connected between the first motor (18) and the first transmission assembly (14); the first transmission structure comprises a first synchronous wheel fixed on an output shaft of the first motor (18), a second synchronous wheel fixed on an output shaft of the first transmission assembly (14), and a synchronous belt connected to the first synchronous wheel and the second synchronous wheel.

6. The workpiece fixing jig as claimed in claim 2, wherein a bearing seat (20) is fixed on the upper end face of the base (1), a first flange (12) is arranged above the bearing seat (20), the lower end of the first flange (12) is fixedly connected with the base (1), and the inner wall of the first flange (12) is hermetically and rotatably connected with the shaft sleeve (2).

7. The workpiece fixing jig as claimed in claim 6, wherein the shaft sleeve (2) comprises a sleeve (2.1) with a lower end rotatably connected with the bearing seat (20), a connecting bearing (2.2) fixed on the top surface of the sleeve (2.1), and a second flange (2.3) fixed on the top surface of the connecting bearing (2.2), the connecting bearing (2.2) is fixedly connected with the fixing seat (5) through the second flange (2.3), and the lower end of the connecting bearing (2.2) is inserted into the first flange (12).

8. The workpiece fixing jig as claimed in claim 7, wherein the first flange (12) is provided with two annular grooves (24) and two ventilation channels (23), the two annular grooves (24) are formed in the inner surface of the first flange (12), the two ventilation channels (23) are respectively communicated with the two annular grooves (24) and the outer surface of the first flange (12), the lower end of the connecting bearing (2.2) is hermetically connected with the two annular grooves (24), the upper end of the connecting bearing (2.2) is provided with two ventilation channels (25) respectively communicated with the two annular grooves (24), and the two ventilation channels (25) are connected with the telescopic structure (4).

9. The fixture for fixing the workpiece as claimed in claim 1, wherein the cross section of the rotating shaft (10) at the end far away from the telescopic structure (4) is non-circular, the rotating shaft (10) is provided with an end cover (8) at the outer side of the non-circular position of the cross section, the end cover (8) is fixed on the rotating drum (6), and the center of the end cover (8) is provided with a through hole matched with the non-circular position of the cross section of the rotating shaft (10); the end part of the rotating shaft (10) far away from one end of the telescopic structure (4) is connected with a clamping jaw which is fixed on the end cover (8).

10. The workpiece fixing jig as claimed in claim 1, wherein a second transmission structure (9) is connected between the drum (6) and the transmission shaft (11), the second transmission structure (9) comprises a first bevel gear (9.1) fixed on the drum (6) and a second bevel gear (9.2) fixed on the upper end of the transmission shaft (11), and the first bevel gear (9.1) and the second bevel gear (9.2) are meshed.

Technical Field

The invention relates to the field of polishing equipment, in particular to a workpiece fixing jig.

Background

In the existing fixture structure for fixing the workpiece, the workpiece is usually only moved along the X axis and/or the Y axis and is driven to rotate, and the structure is usually only suitable for processing the workpiece with a simple structure. When the work piece to the complicated structure carries out manufacturing procedure such as polishing, generally need remove the work piece, rotate and swing, make work piece and the better contact of throwing aureola, play better polishing effect, consequently because the direction of motion of current fixed tool structure has the restriction, can only be through adjusting fixed position many times to the work piece, adjust the polishing surface, quite troublesome, moreover, current fixed tool structure, the subassembly is removed to the X axle with the independent structure usually, the simple fixed of Y axle removal subassembly and work piece rotating assembly is in the same place, it is big to lead to fixed tool structure occupation space, and then the volume demand to polishing equipment has been increaseed.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a workpiece fixing jig, which solves the problems that the conventional workpiece fixing jig is large in size and cannot be suitable for fixing workpieces with complex structures.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a tool is fixed to work piece, the on-line screen storage device comprises a base, the vertical axle sleeve that is provided with on the base, the axle sleeve lower extreme is connected with first drive structure, the axle sleeve upper end is fixed with the fixing base, the inside horizontal rotation of fixing base is connected with the rotary drum, the rotary drum transmission is connected with the transmission shaft, the transmission shaft lower extreme runs through the axle sleeve and is connected with second drive structure below the axle sleeve, the inside sliding connection of rotary drum has the pivot, pivot one end is rotated and is connected with extending structure, extending structure fixes on.

In the workpiece fixing jig, the first driving structure comprises a first motor and a first transmission assembly in transmission connection with the first motor, the first motor and the first transmission assembly are fixed on the base, and the first transmission assembly is connected with the shaft sleeve; the second driving structure comprises a second motor and a second transmission assembly in transmission connection with the second motor, the second motor and the two transmission assemblies are fixed on the base, and the second transmission assembly is connected with the transmission shaft.

In the workpiece fixing jig, the transmission shaft is connected with the first transmission assembly and the second transmission assembly in a sliding manner, a bottom cover is fixed on the lower end face of the second transmission assembly, and an adjusting screw for adjusting the height position of the transmission shaft is arranged on the bottom cover.

In the workpiece fixing jig, the first transmission assembly and the second transmission assembly are of a worm and gear structure.

In the workpiece fixing jig, a first transmission structure is connected between a first motor and a first transmission assembly; the first transmission structure comprises a first synchronizing wheel fixed on an output shaft of the first motor, a second synchronizing wheel fixed on an output shaft of the first transmission assembly, and a synchronous belt connected to the first synchronizing wheel and the second synchronizing wheel.

In the workpiece fixing jig, a bearing seat is fixed on the upper end face of the base, a first flange is arranged above the bearing seat, the lower end of the first flange is fixedly connected with the base, and the inner wall of the first flange is hermetically and rotatably connected with the shaft sleeve.

In the workpiece fixing jig, the shaft sleeve comprises a sleeve, a connecting bearing and a second flange, the lower end of the sleeve is rotatably connected with the bearing seat, the connecting bearing is fixed on the top surface of the sleeve, the second flange is fixed on the top surface of the connecting bearing, the connecting bearing is fixedly connected with the fixing seat through the second flange, and the lower end of the connecting bearing is inserted into the first flange.

In the workpiece fixing jig, two annular grooves and two ventilation channels are arranged on the first flange, the two annular grooves are formed in the inner surface of the first flange, the two ventilation channels are respectively communicated with the two annular grooves and the outer surface of the first flange, the lower end of the connecting bearing is hermetically connected with the two annular grooves, the upper end of the connecting bearing is provided with two ventilation channels respectively communicated with the two annular grooves, and the two ventilation channels are connected with the telescopic structure.

In the workpiece fixing jig, the cross section of one end of the rotating shaft, which is far away from the telescopic structure, is non-circular, the rotating shaft is provided with an end cover at the outer side of the position where the cross section is non-circular, the end cover is fixed on the rotating drum, and the center of the end cover is provided with a through hole matched with the position where the cross section of the rotating shaft is non-circular; the end part of the rotating shaft far away from one end of the telescopic structure is connected with a clamping jaw which is fixed on the end cover.

In the workpiece fixing jig, a second transmission structure is connected between the rotary drum and the transmission shaft, the second transmission structure comprises a first bevel gear fixed on the rotary drum and a second bevel gear fixed at the upper end of the transmission shaft, and the first bevel gear is meshed with the second bevel gear.

Has the advantages that: the polishing wheel is characterized in that a shaft sleeve is vertically arranged on a base, the lower end of the shaft sleeve is connected with a first driving structure, a fixed seat is fixed at the upper end of the shaft sleeve, a rotary drum is transversely and rotatably connected inside the fixed seat, the rotary drum is in transmission connection with a transmission shaft, the lower end of the transmission shaft penetrates through the shaft sleeve, a second driving structure is connected below the shaft sleeve, a rotary shaft is slidably connected inside the rotary drum, one end of the rotary shaft is rotatably connected with a telescopic structure, the telescopic structure is fixed on the fixed seat, and the other end of the rotary shaft extends to the outer side of the fixed seat; one end of the rotating shaft is provided with a clamping jaw for clamping a workpiece, and the clamping jaw is driven to work through a telescopic structure, so that the workpiece is quickly clamped; moreover, the transmission shaft is inserted into the shaft sleeve in a penetrating mode, and the rotating shaft is installed inside the fixing seat, so that the structure is compact, the size of the workpiece fixing jig is reduced, and the space requirement of machining equipment for installing the workpiece fixing jig and the workpiece is reduced.

Drawings

Fig. 1 is a first front view of a workpiece fixing jig according to the present invention.

Fig. 2 is a first perspective view of the workpiece fixing jig provided by the present invention, wherein 1/4 is cut away.

Fig. 3 is a second perspective view of the workpiece fixing jig provided by the invention.

Fig. 4 is a second front view of the workpiece fixing jig provided by the present invention.

Fig. 5 is a schematic view of a connection structure between the connection bearing and the first flange.

Fig. 6 is a schematic view of the engagement of the first bevel gear and the second bevel gear in the top view.

Description of the main element symbols: 1-a base, 2-a shaft sleeve, 2.1-a sleeve, 2.2-a connecting bearing, 2.3-a second flange, 3-a second bearing, 4-a telescopic structure, 5-a fixed seat, 6-a rotary drum, 7-a third bearing, 8-an end cover, 9-a second transmission structure, 9.1-a first bevel gear, 9.2-a second bevel gear, 10-a rotary shaft, 11-a transmission shaft, 12-a first flange, 13-a first bearing, 14-a first transmission component, 15-a third flange, 16-a second transmission component, 17-a first transmission structure, 18-a first motor, 19-a second motor, 20-a bearing seat, 21-a bottom cover, 22-an adjusting screw, 23-a ventilation channel, 24-an annular groove and 25-a ventilation channel.

Detailed Description

The present invention provides a workpiece fixing jig, and in order to make the objects, technical solutions, and effects of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

Please refer to fig. 1 and 2, a fixture for fixing a workpiece includes a base 1, a shaft sleeve 2 is vertically disposed on the base 1, the lower end of the shaft sleeve 2 is disposed in the base 1 and connected with a first driving structure (including a first motor 18 and a first transmission assembly 14), a fixing seat 5 is fixed on the upper end of the shaft sleeve 2, a rotary drum 6 is horizontally rotatably connected inside the fixing seat 5, a rotary shaft 10 is slidably connected inside the rotary drum 6, one end of the rotary shaft 10 is rotatably connected with a telescopic structure 4, the telescopic structure 4 is fixed on the fixing seat 5, and the other end of the rotary shaft 10 extends to the outside of the fixing seat. Specifically, first drive structure drive axle sleeve 2 rotates, and then drives fixing base 5, rotary drum 6, pivot 10 and extending structure 4 and rotate round the axis of axle sleeve 2 for fix and keep away from the work piece of extending structure 4 one end at pivot 10 and use axle sleeve 2 to rotate as the center. Preferably, the fixing seat 5 is in a shape of a T, i.e. a three-way joint, so that the installation of the shaft sleeve 2 and the rotating shaft 10 is facilitated, and the connection with the shaft sleeve 2 is facilitated.

The rotating drum 6 is in transmission connection with a transmission shaft 11, the transmission shaft 11 is arranged in the shaft sleeve 2, the lower end of the transmission shaft 11 penetrates through the shaft sleeve 2 and is connected with a second driving structure (comprising a second motor 19 and a second transmission assembly 16) below the shaft sleeve 2, a second transmission structure 9 is connected between the rotating drum 6 and the transmission shaft 11, the second transmission structure 9 comprises a first bevel gear 9.1 fixed on the rotating drum 6 and a second bevel gear 9.2 fixed on the upper end of the transmission shaft 11, and the first bevel gear 9.1 is meshed with the second bevel gear 9.2. Therefore, through the meshing of the first bevel gear 9.1 and the second bevel gear 9.2, the vertically arranged transmission shaft 11 can drive the horizontally arranged drum 6 to rotate, so that the workpiece fixed at one end of the rotating shaft 10 far away from the telescopic structure 4 rotates by taking the axis of the drum 6 as the center.

Of the above, the first and second drive assemblies 14, 16 are preferably worm and gear arrangements.

Wherein, extending structure 4 mainly used drives 11 rectilinear movement of transmission shaft, it is preferably telescopic cylinder, pivot 10 and rotary drum 6 sliding connection, relative rotation can not take place between the two, and extending structure 4's tailpiece of the piston rod and pivot 10 rotate to be connected, make extending structure 4's tailpiece of the piston rod and pivot 10 can only take place relative rotation, can not take place relative movement, consequently, when second drive structure drive rotary drum 6 and pivot 10 rotate, can not drive telescopic cylinder's piston rod and rotate, and extending structure 4 can drive pivot 10 and remove.

Preferably, the rotating shaft 10 is provided with an axial blind hole at one end face of the telescopic structure 4, and the output shaft of the telescopic structure 4 is connected in the blind hole through a bearing, so that the output shaft of the telescopic structure 4 is connected with the rotating shaft 10 only in a rotatable and immovable manner.

In a preferred embodiment, the cross section of the rotating shaft 10 at the end far away from the telescopic structure 4 is non-circular, that is, the cross section of the position where the rotating shaft 10 is inserted into the rotary drum 6 is circular, the cross section of the non-circular position is oval or polygonal, an end cover 8 is arranged outside the non-circular position of the cross section of the rotating shaft 10, the end cover 8 is fixed on the end face of one end of the rotary drum 6, and a through hole matched with the rotating shaft 10 at the non-circular position of the cross section is arranged in the center of the end cover 8; wherein, the length of the non-circular position of the cross section of the rotating shaft 10 is larger than the thickness of the end cover 8. The cross section of the rotating shaft 10 is non-circular and is matched with the through hole of the end cover 8, so that the rotating shaft 10 cannot rotate relative to the rotating drum 6, and the sliding connection is realized.

In practical use, the workpiece can be fixed on the rotating shaft 10, so that when the workpiece is polished, the workpiece can move in a reciprocating manner under the driving of the telescopic structure 4, the polishing surface forms 'oscillating' motion relative to the polishing wheel, and the polishing effect is improved.

In a preferred embodiment, the shaft 10 is connected at its end remote from the telescopic structure 4 to a claw (not shown) which is fixed to the end cap 8. The clamping jaws are sleeve 2.1 chucks, and the rotating shaft 10 is connected with a pull rod of the sleeve 2.1 chuck, so that when the telescopic structure 4 is stretched, the sleeve 2.1 chuck is driven to expand or contract to fix a workpiece.

In the above structure, since the first bevel gear 9.1 and the second bevel gear 9.2 are engaged, when the first driving structure drives the fixed seat 5 to rotate, if the second bevel gear 9.2 is not moved, the first bevel gear 9.1 rotates on the second bevel gear 9.2, and therefore the rotating shaft 10 drives the workpiece to rotate.

In a preferred embodiment, when processing a workpiece which does not need to rotate around the axis of the drum 6, in order to solve the problem that the rotating shaft 10 drives the workpiece to rotate when the fixing base 5 rotates, when the first driving structure is controlled to operate, and the first driving structure drives the fixing base 5 and the rotating shaft 10 to rotate, the second driving structure drives the second bevel gear 9.2 to rotate by a corresponding angle in the same direction, and the rotation angle between the first driving structure and the second driving structure is eliminated, that is, the first driving structure drives the fixing base 5 and the second driving structure drives the second bevel gear 9.2 to rotate synchronously, so that when the fixing base 5 is driven to rotate, the workpiece cannot rotate, and the processing requirements on different workpieces are met. Moreover, the transmission shaft 11 is inserted in the shaft sleeve 2, and the rotating shaft 10 is installed in the fixed seat 5, so that the structure is compact, the size of the workpiece fixing jig is reduced, and the space requirement of processing equipment for installing the workpiece fixing jig and the workpiece is reduced.

In the structure, when a workpiece only needs to rotate around the axis of the rotating shaft 10, the first driving structure is in a shutdown state, the second driving structure drives the transmission shaft 11 to rotate and is in meshing transmission through the first bevel gear 9.1 and the second bevel gear 9.2, so that the rotating drum 6 rotates, the end cover 8 is fixed at one end of the rotating drum 6, the rotating shaft 10 penetrates through the inside of the rotating drum 6 and is non-circular in cross section at the position matched with the end cover 8, the rotating drum 6 drives the rotating shaft 10 to rotate, and the workpiece rotates around the axis of the rotating shaft 10.

When the first driving structure drives the shaft sleeve 2 to rotate, if the second driving structure is in a shutdown state, that is, the second bevel gear 9.2 is not moved, the first driving structure drives the shaft sleeve 2 to rotate, the first bevel gear 9.1 needs to rotate, so that the second bevel gear 9.2 and the first bevel gear 9.1 are relatively applied, so that the drum 6 can rotate to a required direction, and because the drum 6 is fixedly connected with the first bevel gear 9.1, when the first bevel gear 9.1 rotates, the drum 6 can also drive the workpiece to rotate along the axis of the drum 6 (that is, the axis of the rotating shaft 10). For example, in fig. 6, when the first bevel gear 9.1 rotates to the dotted line position, the relative movement amount of the angle θ with the second bevel gear 9.2 needs to occur, and when the second bevel gear 9.2 is at a standstill, the relative movement amount is completed by the rotation of the first bevel gear 9.1, so that the drum 6 also drives the workpiece to rotate along the axis of the drum 6 (i.e. the axis of the rotating shaft 10).

When the first drive structure drives the shaft sleeve 2 to rotate and the workpiece cannot rotate, namely the first bevel gear 9.1 cannot rotate on the axis thereof, the required amount of relative movement is completed by the rotation of the second bevel gear 9.2, namely in fig. 6, the second bevel gear 9.2 rotates in the direction indicated by the arrow, and the angular speed and direction of rotation are the same as the angular speed and direction of rotation of the first drive structure driving the fixed seat 5, and the operation is synchronized, so that the second bevel gear 9.2 rotates by the required amount of relative movement. Namely, when the first driving structure works and the first driving structure drives the fixed seat 5 to rotate, the second driving structure drives the rotating shaft 10 to rotate by a corresponding angle, so that the first bevel gear 9.1 does not need to rotate, namely, the workpiece does not rotate. In practical application, the corresponding motion program can be input through the control element for controlling the first driving structure and the second driving structure, that is, the program for controlling the second driving structure to drive the rotating shaft 10 to rotate by a corresponding angle when the first driving structure drives the fixed seat 5 to rotate is controlled, so that the function can be selected as required.

Referring to fig. 3, in a preferred embodiment, the first driving structure includes a first motor 18 and a first transmission assembly 14 in transmission connection with the first motor 18, the first motor 18 and the first transmission assembly 14 are fixed on the base 1, the first transmission assembly 14 is connected with the shaft sleeve 2, and the first transmission assembly 14 may be a worm gear reducer. In practical applications, a first transmission structure 17 may be connected between the first motor 18 and the first transmission assembly 14 according to the installation position requirement of the first motor 18. In a preferred embodiment of this embodiment, the first transmission structure includes a first synchronizing wheel fixed to the output shaft of the first motor 18, a second synchronizing wheel fixed to the output shaft of the first transmission assembly 14, and a timing belt connected to the first synchronizing wheel and the second synchronizing wheel. The second driving structure comprises a second motor 19 and a first transmission assembly 14 in transmission connection with the second motor 19, the second motor 19 and a second transmission assembly 16 are fixed on the base 1, and the second transmission assembly 16 is connected with the transmission shaft 11; likewise, the second transmission assembly 16 may be a worm gear reducer.

A third flange 15 is fixed between the first transmission component 14 and the second transmission component 16, and the third flange 15 is sleeved outside the transmission shaft 11, so that the top surface of the second transmission component 16 is connected with the first transmission component 14 except that the side surface of the second transmission component is fixed with the base 1, and the top surface and the side surface of the first transmission component 14 are connected with the base 1, so that the installation is more stable after the second transmission component is installed.

Referring to fig. 4, in a preferred embodiment, the transmission shaft 11 is slidably connected to the first transmission assembly 14 and the second transmission assembly 16, and a bottom cover 21 is fixed to a lower end surface of the second transmission assembly 16, and an adjusting screw 22 for adjusting the height position of the transmission shaft 11 is disposed on the bottom cover 21. The adjusting screw 22 is screwed to push the transmission shaft 11 to lift, so that the position of the second bevel gear 9.2 on the transmission shaft 11 is adjusted, the tightness of meshing between the second bevel gear 9.2 and the first bevel gear 9.1 is adjusted, the meshing position error of the second bevel gear 9.2 and the first bevel gear 9.1 generated by machining is overcome, and the transmission precision is improved. In practical applications, a bearing is disposed between the transmission shaft 11 and the adjusting screw 22 for facilitating the support of the transmission shaft 11 and reducing the friction of the transmission shaft 11.

Referring to fig. 1, 2 and 4, in particular, in order to reduce the friction force of each rotating structure, a first bearing 13 is disposed between the shaft sleeve 2 and the base 1, a second bearing 3 is disposed between the outer surface of the transmission shaft 11 and the inner wall surface of the shaft sleeve 2, third bearings 7 are disposed at two ends of the rotating drum 6, and the rotating drum 6 is connected to the fixing base 5 through the third bearings 7. Namely, bearings are arranged on each part which rotates relatively, so that the friction between the two parts which rotate relatively is reduced. The bearing seat 20 is fixed on the upper end face of the base 1, the first bearing 13 is arranged in the bearing seat 20, the first flange 12 is arranged above the bearing seat 20, the lower end of the first flange 12 is fixedly connected with the base 1, and the inner wall of the first flange 12 is hermetically and rotatably connected with the shaft sleeve 2. The shaft sleeve 2 is connected to the base 1 through the first bearing 13 and the bearing seat 20, so that the contact area of connection and the stability of the shaft sleeve 2 are increased.

Preferably, for simple to operate, the shaft sleeve 2 includes the sleeve 2.1 that the lower extreme is connected with base 1, fixes the coupling bearing 2.2 at sleeve 2.1 top surface to and fix the second flange 2.3 between coupling bearing 2.2 and fixing base 5. Wherein, the lower extreme of joint bearing 2.2 is inserted inside first flange 12, is connected through the cooperation of joint bearing 2.2 and bearing frame 20, can also set up the sealing washer in this department, realizes sealing connection, avoids lubricating oil to flow out, also can realize the gas seal in the annular groove 24 that the following describes.

Referring to fig. 5, specifically, the first flange 12 is provided with two annular grooves 24 and two air passages 23, the two annular grooves 24 are formed in the inner surface of the first flange 12, the two air passages 23 are respectively communicated with the two annular grooves 24 and the outer surface of the first flange 12, the lower end of the connecting bearing 2.2 is hermetically connected with the two annular grooves 24, the upper end of the connecting bearing 2.2 is provided with two air exchange passages 25 respectively communicated with the two annular grooves 24, the two air exchange passages 25 are communicated with the outer surface of the upper end of the connecting bearing 2.2, and the two air exchange passages 25 are connected with the telescopic structure 4 through a pipeline. Wherein, two air channels 23, two annular grooves 24, two air exchange channels 25 and the pipeline connecting the air exchange channels 25 and the telescopic structure 4 form the air supply pipeline of the telescopic structure 4, thereby realizing the pneumatic driving of the telescopic structure 4.

In the above, since the first flange 12 is rotatably connected to the connecting bearing 2.2, and the two annular grooves 24 and the outer surface of the lower end of the connecting bearing 2.2 form two cavities, no matter which position the connecting bearing 2.2 rotates to, the corresponding ventilation channel 23 and the ventilation channel 25 can be ensured to be communicated. Therefore, when the fixed seat 5 rotates, the pipeline connected with the telescopic structure 4 can not be wound on the shaft sleeve 2.

According to the polishing machine, the shaft sleeve 2 is vertically arranged on the base 1, the lower end of the shaft sleeve 2 is connected with the first driving structure, the upper end of the shaft sleeve 2 is fixedly provided with the fixed seat 5, the inside of the fixed seat 5 is transversely and rotatably connected with the rotary drum 6, the rotary drum 6 is in transmission connection with the transmission shaft 11, the lower end of the transmission shaft 11 penetrates through the shaft sleeve 2, the lower side of the shaft sleeve 2 is connected with the second driving structure, the inside of the rotary drum 6 is in sliding connection with the rotary shaft 10, one end of the rotary shaft 10 is rotatably connected with the telescopic structure 4, the telescopic structure 4 is fixed on the fixed seat 5, and the other end of the rotary shaft 10 extends to the outer side of the fixed seat 5, so that when a workpiece is fixed on the rotary shaft 10, the workpiece can be driven; a clamping jaw for clamping a workpiece is arranged at one end of the rotating shaft 10, and the telescopic structure 4 is used for driving the clamping jaw to work, so that the workpiece is quickly clamped; moreover, the transmission shaft 11 is inserted in the shaft sleeve 2, and the rotating shaft 10 is installed in the fixed seat 5, so that the structure is compact, the size of the workpiece fixing jig is reduced, and the space requirement of processing equipment for installing the workpiece fixing jig and the workpiece is reduced.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.