CN209831004U - Be applicable to box-like pneumatic adds clamping apparatus of many varieties axle sleeve - Google Patents

Abstract

The utility model discloses a be applicable to the modular pneumatic processing anchor clamps of many varieties axle sleeve, the axle sleeve is the diplopore axle sleeve of gear oil pump, include: the tensioning cylinder is arranged at the lower end of the upper panel, and a cylinder body of the tensioning cylinder is connected with the upper panel; the guide plate is positioned between the tensioning cylinder and the upper panel and is respectively connected with a cylinder rod of the tensioning cylinder and the pull rod; the guide post penetrates through the cylindrical through hole in the guide plate and is connected with the upper panel; the upper panel is provided with the expansion sleeves of various sizes and used for clamping various types of shaft sleeves. The utility model discloses an anchor clamps through the cover that expands of installation unidimensional on the top panel, can be applicable to the combination processing of multiple type of axle sleeve, through the setting of clamp plate, can fix a position the adjustment to the axle sleeve before the clamping is accomplished, makes the appearance and the surface finish precision height of axle sleeve.

Description

Be applicable to box-like pneumatic adds clamping apparatus of many varieties axle sleeve

Technical Field

The utility model relates to a shaft sleeve type anchor clamps field, concretely relates to be applicable to box-like pneumatic machining anchor clamps of many varieties shaft sleeve.

Background

The axle sleeve is the important part of constituteing gear oil pump (motor), and the double pump needs 4 axle sleeves, and the triple pump needs 6 axle sleeves. With the wide application in the field of hydraulic technology, the market of gear oil pumps is continuously expanded, and the demand of shaft sleeves is increased at a high speed. The traditional shaft sleeve has the defects of various processing procedures, long production flow line, poor product quality stability, single type of clamp processing shaft sleeve and low production efficiency. The productivity is difficult to be greatly improved, the product quality is difficult to control, the unit price is high, and high-efficiency market competitiveness is difficult to form.

At present, the machining industry mainly changes automation and process centralization into a main development direction, and automatic and simplified machining can be completely realized through redesigning a shaft sleeve machining tool. The production line is greatly shortened, the clamping times are reduced, the labor cost is reduced, the processing stability is improved, and the market competitiveness is improved.

SUMMERY OF THE UTILITY MODEL

For overcoming prior art's defect, the utility model aims to provide a be applicable to the modular pneumatic processing anchor clamps of many varieties axle sleeve to realize the multiple type axle sleeve of quick clamping.

Therefore, the novel modular pneumatic machining anchor clamps of shaft sleeve suitable for many varieties are proposed, the axle sleeve is the diplopore axle sleeve of gear oil pump, include: the lower part of the upper panel is connected with a machine tool through a supporting structure, the upper panel is in an overhead state above the machine tool, the expansion sleeve is arranged on the upper panel, a pull rod is arranged in the expansion sleeve, and the expansion sleeve protrudes out of the upper surface of the upper panel; the tensioning cylinder is arranged at the lower end of the upper panel, and the cylinder body of the tensioning cylinder is connected with the upper panel; the guide plate is positioned between the tensioning cylinder and the upper panel and is respectively connected with a cylinder rod of the tensioning cylinder and the pull rod; the guide post penetrates through the cylindrical through hole in the guide plate and is connected with the upper panel; the upper panel is provided with the expansion sleeves of various sizes and used for clamping various types of shaft sleeves.

Further, the clamp further comprises a pressing plate and a rotary clamping cylinder, the rotary clamping cylinder is fixed to the lower portion of the upper panel, a cylinder rod of the rotary clamping cylinder penetrates through the upper panel to be connected with the pressing plate, and the rotary clamping cylinder is used for pressing and positioning the shaft sleeve before the shaft sleeve is expanded by the expansion sleeve and withdrawing after the shaft sleeve is expanded by the expansion sleeve.

Furthermore, the upper surface of the upper panel is provided with a boss for supporting the shaft sleeve, the upper surface of the boss is provided with a plurality of supporting blocks for blowing up the shaft sleeve during exhaust, and the supporting blocks are provided with air outlet holes at the central positions.

Furthermore, several groups of blind holes are processed on the side surface of the upper panel, the same group of blind holes are communicated with each other and are only provided with one air inlet, and the air outlet holes are communicated with the same group of blind holes.

Furthermore, a kidney-shaped groove is formed in the pressure plate, and the kidney-shaped groove is matched with a convex block on a cylinder rod of the rotary clamping cylinder.

Furthermore, support nails are installed at two ends of the pressing plate and used for pressing the shaft sleeve from the top.

Further, the supporting structure comprises a bottom plate and a side plate, the bottom plate is connected with the upper panel through the side plate, and the bottom plate is connected with a machine tool.

Furthermore, a first threaded hole is processed in the side face of the guide plate, the first threaded hole is communicated with a second threaded hole in the guide plate, the second threaded hole is used for installing the pull rod, a set screw is installed in the first threaded hole, and the set screw is used for jacking threads of the pull rod.

The utility model discloses a box-like pneumatic processing anchor clamps of many varieties axle sleeve, through the not unidimensional cover that expands of installation on the top panel, can be applicable to the combination processing of multiple type axle sleeve, through the setting of clamp plate, can fix a position the adjustment to the axle sleeve before the clamping is accomplished, make the appearance and the surface machining precision of axle sleeve high, improve degree of automation through pneumatic control, can be adapted to many occasions such as ordinary lathe, digit control machine tool and with manipulator complex intelligent processing. Furthermore, the utility model discloses an anchor clamps have that the clamping is convenient fast, the machining precision is high, can effectual improvement production efficiency, guarantee production quality's stability, simultaneously, anchor clamps itself have advantages such as workable, easy equipment, stability are good, easy maintenance.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the clamp of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a view of the projection of FIG. 1 in the direction P;

FIG. 4 is a schematic structural view of an upper panel of the clamp of the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 4 at I;

fig. 7 is a schematic structural view of a guide plate in the clamp of the present invention;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7;

fig. 9 is a schematic structural view of the expansion sleeve in the clamp of the present invention;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;

FIG. 11 is a schematic structural view of a pressing plate of the clamp of the present invention;

FIG. 12 is a sectional view taken along line E-E of FIG. 11;

fig. 13 is a schematic structural view of a pull rod in the clamp of the present invention;

FIG. 14 is a schematic structural view of a support pin in the clamp of the present invention;

fig. 15 is a schematic structural view of the shaft sleeve to be clamped by the clamp of the present invention; and

fig. 16 is a cross-sectional view of fig. 15.

Description of the reference numerals

1. A first upper panel; 2. a second upper panel; 3. a base plate; 4. a side plate; 5. a guide plate; 6. a pull rod; 7. expanding the sleeve; 8. a guide post; 9. tightening the screw; 10. pressing a plate; 11. a support pin; 12. a plug screw; 13. a rotary clamping cylinder; 14. tensioning the cylinder; 20. a shaft sleeve;

101. a first blind hole; 102. a second blind hole; 103. a third blind hole; 104. a fourth blind hole; 105. a fifth blind hole; 106. a boss; 107. a support block; 108. an air outlet; 110. a through hole; 111. expanding a bottom hole of the sleeve; 112. a threaded hole;

501. a cylindrical through hole; 502. a first threaded hole; 503. a second threaded hole; 504. a cylindrical bore;

601. an external thread; 602. an outer conical surface; 603. an inner hexagonal groove;

701. a fixed portion; 702. an expansion part; 703. a guide cone; 704. chamfering the outer part; 705. inner chamfering; 706. a cylindrical bore; 707. an inner taper hole; 708. a circular hole; 709. an open slot; 710. expanding and tightening blocks; 711. an inner cone; 712. a step;

1003. a cylindrical bore; 1001. a kidney-shaped groove; 1002. a cylindrical bore.

Detailed Description

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 invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1-16 illustrate some embodiments according to the present invention.

As shown in fig. 1 to 3, a pneumatic machining fixture suitable for various shaft sleeve combinations comprises an upper panel and a support structure, wherein the upper panel comprises a first upper panel 1 and a second upper panel 2, the support structure comprises a bottom plate 3 and two side plates 4, wherein the two side plates 4 are respectively erected on two sides of the bottom plate 3 and fixed with the bottom plate 3 through bolts; the first upper panel 1 and the second upper panel 2 are respectively placed on the side plates 4, a plurality of through holes 110 are processed on the upper surfaces of the first upper panel and the second upper panel, and the first upper panel and the second upper panel are fixed with the side plates 4 through bolts penetrating through the through holes 110.

Specifically, the clamp further comprises a guide plate 5, a pull rod 6, an expansion sleeve 7, a guide column 8, a set screw 9 and a tensioning cylinder 14, wherein the guide plate 5, the guide column 8 and the tensioning cylinder 14 are located between the first upper panel 1 and the bottom plate 3, and the guide plate 5 is located between the tensioning cylinder 14 and the first upper panel 1.

Specifically, as shown in fig. 7 to 8, the guide plate 5 has a cylindrical hole 504 in the center thereof, and the guide plate 5 is fixed to the cylinder rod of the tensioning cylinder 14 by a bolt passing through the cylindrical hole 504; the guide post 8 passes through four reserved cylindrical through holes 501 on the guide plate 5 to be connected with the cylinder body of the tensioning cylinder 14, the other end of the guide post 8 is installed on a reserved positioning hole of the first upper panel 1 and the second upper panel 2, and the tensioning cylinder 14 is in threaded connection with the threaded holes 112 on the first upper panel 1 and the second upper panel 2 through bolts.

Specifically, the expansion sleeve 7 is fixed through interference fit with the small holes reserved on the first upper panel 1 and the second upper panel 2; the pull rod 6 penetrates through the expansion sleeve 7 to be connected with the guide plate 5, wherein one end of the pull rod 6 is provided with an external thread 601, the guide plate 5 is provided with a second threaded hole 503 matched with the external thread 601, and the other end of the pull rod 6 is provided with an inner hexagonal groove 603, so that the pull rod 6 can be conveniently screwed on the guide plate 5. In addition, the side of the guide plate 5 is tapped with a first threaded hole 502, and after the pull rod 6 is fixed by the guide plate 5, the set screw 9 is screwed into the first threaded hole 502 to tightly push the thread of the pull rod 6, so that the pull rod 6 is prevented from loosening in the using process.

In this embodiment, at first, place axle sleeve 20 on expanding cover 7 through manipulator or manual work, then, through the work of control tensioning cylinder 14, drive deflector 5 and remove along guide post 8, deflector 5 drives pull rod 6 again and removes, and the conical head of pull rod 6 promotes the expansion of expanding cover 7, and expanded expanding cover 7 fixes axle sleeve 20, makes things convenient for the processing of axle sleeve.

The first upper panel 1 is divided into two identical processing units, namely a first processing unit and a second processing unit, each processing unit is provided with two groups of expansion sleeves 7, and two shaft sleeves 20 can be processed. The number of processing units is adjusted according to the production requirement, and theoretically, the number of the processing units is 1, 2 and 3 … N. Wherein, the size of the expansion sleeve 7 on each unit is different, and the same or different types of shaft sleeves 20 can be processed.

In an embodiment, a plurality of blind holes are drilled on the upper panel side, including a first blind hole 101, a second blind hole 102, a third blind hole 103, a fourth blind hole 104 and a fifth blind hole 105, the hole openings of the blind holes are tapped to form threaded holes for connecting air pipes, wherein the plurality of blind holes are communicated with one another, and a screw plug 12 is installed on the threaded holes of partial blind holes, so that the plurality of blind holes communicated with one another only have one air inlet. Four bosses 106 are processed on the upper surface of the first upper panel 1, wherein the bosses 106 are in a shape like an 8 and are matched with the end faces of the shaft sleeve 20 to be processed, seven support blocks 107 are uniformly distributed on the upper surface of each boss 106, an air outlet 108 is formed in the central position of each support block 107, the air outlets 108 are communicated with the blind holes respectively, and the air outlets 108 are used for blowing up the processed shaft sleeve 20 to prevent inconvenience in taking by a manipulator or a worker after cutting fluid and the shaft sleeve are sucked.

In one embodiment, as shown in fig. 3, 11 and 12, the clamp further comprises a pressure plate 10, a support nail 11 and a rotary clamping cylinder 13, wherein the cylinder body part of the rotary clamping cylinder 13 is fixed on the back surfaces of the first upper panel 1 and the second upper panel 2 through bolts; the supporting nails 11 are fixed by interference fit with the reserved cylindrical holes 1003 on the pressing plate 10; the back of the pressure plate 10 is provided with a kidney-shaped groove 1001, the kidney-shaped groove 1001 is matched with a convex block on a cylinder rod of the rotary clamping cylinder 13, the pressure plate 10 is further provided with a cylindrical hole 1002 communicated with the kidney-shaped groove 1001, the pressure plate 10 penetrates through the cylindrical hole 1002 through a bolt to be fixed on the rotary clamping cylinder 13, and the matching of the kidney-shaped groove 1001 and the convex block has a circumferential limiting effect.

In this embodiment, the rotary clamping cylinder 13 drives the pressing plate 10 to rotate, and the pressing plate 10 is pressed on the back surface of the shaft sleeve 20, so that the shaft sleeve 20 can be pressed before being completely fixed by the expansion sleeve 7, the shaft sleeve can be fixed more stably, and the shaft sleeve 20 is prevented from sliding upwards in the expansion process of the expansion sleeve 7, and further the processing precision is influenced.

In one embodiment, as shown in fig. 9 and 10, the expansion sleeve 7 comprises a fixing portion 701 and an expansion portion 702, the fixing portion 701 comprises an outer chamfer 704, an inner chamfer 705, a cylindrical hole 706 and an inner tapered hole 707 with a size of 30 °, the expansion portion 702 comprises a plurality of expansion blocks 710, an open groove 709, a circular hole 708, a guide cone 703 with a taper size of 2 to 3 °, an inner taper 711 with an angle size of 20 °, and the circular hole 708 is located at the end of the open groove 709 and is communicated with the open groove 709.

The elastic expansion sleeve is provided with an inner taper hole 707, and the elastic performance of the elastic expansion sleeve and the service life of the expansion sleeve can be improved compared with a pure cylindrical hole; a703 guide cone is arranged, and the arrangement of the guide cone has a guiding effect on the placement of the shaft sleeve. Compared with the existing expansion sleeve with the chamfer, the phenomenon that the shaft sleeve is clamped by the shell can not be caused, the shaft sleeve can be conveniently placed manually or by a mechanical hand, the piece placing efficiency is improved, the required precision of the mechanical hand in piece placing is reduced, and the cost is reduced.

In addition, the step 712 formed by the inner arc chamfer on one side of the inner taper hole 707 and the inner taper 711 facilitates the disassembly of the expansion sleeve, the expansion sleeve belongs to a quick-wear part and is in interference fit with the panel, so that the disassembly is inconvenient, and the expansion sleeve can be easily disassembled by pulling the nut through the step.

Specifically, when air is fed from the air outlet of the tensioning cylinder 14, the pull rod 6 moves upwards, the outer conical surface 602 of the pull rod 6 is not in contact with the inner conical hole 707 of the expansion sleeve 7 any more, and the expansion sleeve 7 retracts elastically to realize unclamping. The top of the expanding block 710 of the expanding sleeve 7 is provided with a guide cone 703, when the shaft sleeve 20 to be processed is placed on a processing station, due to the effect of the guide cone 703, the mechanical arm placing or manual placing is very convenient, and the requirements on the angle and position precision of the shaft sleeve are greatly reduced.

The utility model discloses a debugging and work piece clamping process of anchor clamps as follows:

firstly, the tool fixture of the utility model is assembled into a frame structure according to the technical proposal; then, the first blind hole 101, the second blind hole 102, the third blind hole 103 and the fifth blind hole 105 on the upper panel are plugged by using the screw plug 12, the fourth blind hole 104 is provided with a gas pipe connector in a threaded manner and is connected with a gas pipe, the other unmarked holes are processed according to the method, and the gas pipe is connected in series, and only one gas inlet is reserved.

Wherein, the air inlets of the tensioning cylinders 14 on the first upper panel 1 are connected in series, the air outlets are connected in series, and only one air port is reserved. The air inlets of the rotary clamping cylinders 13 on the first upper panel 1 are connected in series, the air outlets are connected in series, and only one air outlet is reserved. The same type of air pipes on the first upper panel 1 and the second upper panel 2 are connected in parallel, and a switch is arranged on each branch. Processing which kind of axle sleeve needs to use which kind of panel, and the switch on this panel is opened, and other switches are closed.

When the first upper panel 1 is needed, an air inlet branch of a tensioning cylinder 14 connected with the first upper panel 1 is opened, and an air outlet is opened; the rotary clamping cylinder 13 connected with the first upper panel 1 is opened at the air inlet branch, opened at the air outlet, opened at the air inlet pipe of the first upper panel 1 and closed at the switches on the other upper panel branches.

After a workpiece to be machined is placed on a machining station, a high-pressure air source penetrates through a reversing valve through a pneumatic triple piece, firstly, an air inlet valve and an air outlet valve of a rotary clamping cylinder 13 (pulled down while rotating) are opened, the rotary clamping cylinder 13 works to drive a pressing plate 10 to be in a standby state to a working state, and the shaft sleeve is pressed and attached to a supporting block 107 on the upper surface of a boss 106. Then the air inlet and outlet switches of the tensioning cylinder 14 are opened, the tensioning cylinder 14 works, and the expansion sleeve 7 expands the shaft sleeve 20 on the outer side.

Then, the reversing valve on the branch of the rotary clamping cylinder 13 works, and the rotary clamping cylinder 13 drives the pressure plate 10 to reset. And (3) the machine tool starts to process the workpiece, after the processing is finished, the reversing valve works on a branch of the tensioning cylinder 14, and the expansion sleeve 7 is loosened and clamped. The branch switch of the blow hole connected to the first upper panel 1 or the second upper panel 2 is turned on, the shaft sleeve 20 is blown up and taken off, and then the branch switch is turned off. One processing cycle is complete.

Besides the above beneficial effects, the utility model discloses still have following technological effect:

1. the utility model discloses a box-like pneumatic processing anchor clamps of many varieties axle sleeve, first top panel 1, second top panel 2 is connected through curb plate 4 and bottom plate 3 and forms posture structure, posture structure monolithic stationary after will assembling is on the lathe, the supporting shoe 107 of accurate grinding top panel boss 106 upper surface, then finish boring bloated cover bottom hole 111 on the face of location, the big or small centre-to-centre spacing of bloated cover bottom hole 111 is confirmed according to treating the processing axle sleeve type, with 7 interference fit of bloated cover, the depth of parallelism requirement and the centre-to-centre spacing requirement of having just so guaranteed 20 processings of axle sleeve, guarantee simultaneously that bloated cover 7 can evenly expand tightly.

2. According to different types of shaft sleeves to be processed, the bosses 106 on the upper panel have different sizes and center distances, and the upper panel can be divided into a first upper panel 1, a second upper panel 2, a third upper panel and an … nth upper panel. The requirement that one clamp can simultaneously process various shaft sleeves 20 is met. The trouble of replacing the clamp is reduced, the production efficiency is improved, and the stability of the processing quality is ensured. The fixture tool shown in fig. 1 can realize two types of shaft sleeve processing.

3. As shown in fig. 4, the first upper panel 1 is divided into two identical processing units, a first processing unit and a second processing unit, each of which can process two bushings 20. The number of processing units is adjusted according to the production requirement, the processing units can be 1, 2 and 3 … N, and large-batch or small-quantity processing can be realized.

4. The clamp of the utility model can be applied in multiple occasions, a manual reversing valve is arranged at the oil inlet and the oil outlet which are connected with the rotary clamping cylinder and the tensioning cylinder, and the processing clamp can be applied to a common machine tool; an electromagnetic directional valve is arranged at the oil inlet and the oil outlet, and the machining clamp can be suitable for a numerical control machine tool; the electromagnetic directional valve is arranged at the oil inlet and the oil outlet and is matched with intelligent control, and the machining clamp can be suitable for automatic machining of a manipulator.

5. As shown in fig. 1, each upper panel can be processed with four shaft sleeves 20, the tensioning cylinder 14 is fixed on a frame structure, when the air inlet of the tensioning cylinder 14 is filled with air, a downward pulling action is realized, the guide plate 5 is driven to move downward, and simultaneously, the pull rod 6 connected with the guide plate 5 through threads is driven to move downward, one end of the pull rod 6 with a cone is in contact extrusion with the inner cone of the expansion sleeve 7, so that the expansion block 710 on the expansion sleeve 7 is stressed outwards to generate elastic deformation, and the expansion block 710 is in contact stress with the inner hole of the shaft sleeve 20, so that the shaft sleeve 20 is fixed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a be applicable to the modular pneumatic processing anchor clamps of many varieties axle sleeve, the axle sleeve is the diplopore axle sleeve of gear oil pump, a serial communication port, includes:

the lower parts of the upper panels (1, 2) are connected with a machine tool through a supporting structure, the upper panels (1, 2) are in an overhead state above the machine tool,

the expansion sleeve (7) is arranged on the upper panels (1 and 2), a pull rod (6) is arranged in the expansion sleeve (7), and the expansion sleeve (7) protrudes out of the upper surfaces of the upper panels (1 and 2);

the tensioning cylinder (14) is arranged at the lower end of the upper panels (1 and 2), and the cylinder body of the tensioning cylinder (14) is connected with the upper panels (1 and 2);

the guide plate (5) is positioned between the tensioning cylinder (14) and the upper panels (1 and 2) and is respectively connected with a cylinder rod of the tensioning cylinder (14) and the pull rod (6); and

the guide post (8) penetrates through a cylindrical through hole (501) in the guide plate (5) and is connected with the upper panels (1 and 2);

the upper panels (1 and 2) are provided with the expansion sleeves (7) with various sizes and used for clamping various types of shaft sleeves (20).

2. The pneumatic machining clamp suitable for various shaft sleeve combinations according to claim 1, further comprising a pressure plate (10) and a rotary clamping cylinder (13), wherein the rotary clamping cylinder (13) is fixed at the lower part of the upper panel (1, 2), and a cylinder rod of the rotary clamping cylinder (13) penetrates through the upper panel (1, 2) to be connected with the pressure plate (10) for pressing and positioning the shaft sleeve (20) before the shaft sleeve (20) is expanded by the expansion sleeve (7) and withdrawing after the shaft sleeve (20) is expanded by the expansion sleeve (7).

3. The pneumatic machining clamp suitable for various shaft sleeve combinations according to claim 1 or 2, wherein the upper surface of the upper panel (1, 2) is provided with a boss (106) for supporting the shaft sleeve (20), a plurality of supporting blocks (107) are distributed on the upper surface of the boss (106) and used for blowing up the shaft sleeve (20) during exhaust, and the supporting blocks (107) are provided with air outlet holes (108) at central positions.

4. The combined pneumatic machining clamp suitable for various shaft sleeves according to claim 3, wherein the side faces of the upper panels (1 and 2) are provided with a plurality of groups of blind holes, the same group of blind holes are communicated with each other and are only provided with one air inlet, and the plurality of air outlet holes (108) are communicated with the same group of blind holes.

5. The pneumatic machining clamp suitable for various shaft sleeve combinations according to claim 2, wherein the pressure plate (10) is provided with a kidney-shaped groove (1001), and the kidney-shaped groove (1001) is matched with a lug on a cylinder rod of the rotary clamping cylinder (13).

6. The combined pneumatic processing clamp for the multiple shaft sleeves as claimed in claim 2, wherein support nails (11) are mounted at two ends of the pressure plate (10) for pressing the shaft sleeves (20) from the top.

7. The combined pneumatic machining fixture for the multiple shaft sleeves as claimed in claim 1, wherein the supporting structure comprises a bottom plate (3) and side plates (4), the bottom plate (3) is connected with the upper panels (1 and 2) through the side plates (4), and the bottom plate (3) is connected with a machine tool.

8. The pneumatic machining clamp suitable for various shaft sleeve combinations according to claim 1, wherein a first threaded hole (502) is machined in the side face of the guide plate (5), the first threaded hole (502) is communicated with a second threaded hole (503) which is formed in the guide plate and used for installing the pull rod (6), a set screw (9) is installed in the first threaded hole (502), and the set screw (9) is used for tightly jacking threads of the pull rod (6).