Pneumatic press-fitting device for assembling valve body diaphragm

Abstract

The invention discloses a pneumatic press-fitting device for assembling a valve body diaphragm, and particularly relates to the technical field of assembling and press-fitting, which comprises a press-fitting plate, a press-fitting strip, a micro electric cylinder and a limiting press-fitting discharging mechanism, wherein the limiting press-fitting discharging mechanism comprises a linkage block, a linkage frame, a two-way screw rod, an adjusting motor, two sleeving blocks and an arc-shaped positioning block; the device further comprises a limiting adjusting mechanism, a guide sliding column and a guide press-fitting assembly. The limiting press-fitting discharging mechanism has the advantages that accurate limiting can be achieved, accurate discharging is achieved after limiting, and the press-fitting accuracy of assembled valve body diaphragms is greatly improved, so that the problem that in the press-fitting process, large force needs to be used for achieving impact press-fitting, and consequently the assembly efficiency of the diaphragms is greatly improved after impact press-fitting is solved. The problems that the whole assembled valve body diaphragm is pressed excessively and is difficult to discharge downwards, accurate limiting press fitting is difficult to carry out, and the press fitting accuracy of the assembled valve body diaphragm is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of assembly and pressing, and more particularly to a pneumatic pressing device for assembling a valve body diaphragm. Background Art

[0002] The pneumatic pressing device for assembling valve body diaphragm is mainly used for the installation of diaphragm and valve body in the production process of automobile vacuum booster. The pneumatic pressing device adopts air pressure-controlled pressing method to realize automatic or semi-automatic diaphragm installation process, which significantly improves production efficiency compared with the traditional manual pressing method.

[0003] In the existing public documents, the patent announcement number CN213003633U discloses a pneumatic press-fit device for assembling valve body parts. This technology uses air pressure to control the press-fit method, and designs a valve body part press-fit device that allows workers to use their hands and feet to improve work efficiency. It solves the problem that the existing technology uses a press sheet to manually press the diaphragm onto the valve body, which makes the press-fit efficiency low, and the diaphragm is unevenly stressed during the press-fit process, resulting in the vacuum booster leaking and unqualified after the finished product is formed. The extrusion contact can achieve uniform force at the circumferential contact of the valve body workpiece when the diaphragm is pressed, thereby improving the product qualification rate. However, this technology still has the following defects;

[0004] When the pneumatic pressing device is pressing the assembled valve body diaphragm, it needs to be placed in a specified position and then the pressing operation is performed. During the pressing process, a large force is required to achieve impact pressing. This results in the entire assembled valve body diaphragm being over-squeezed and difficult to discharge after the impact pressing, and it is also difficult to perform precise limit pressing, resulting in poor accuracy in the pressing of the assembled valve body diaphragm. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: a pneumatic pressing device for assembling a valve body diaphragm, comprising a pressing plate, a pressing strip and a micro-electric cylinder, wherein the pressing strip is fixed on one side of the pressing plate, the micro-electric cylinder is fixedly connected to the upper surface of the pressing strip, and a limit pressing and discharging mechanism is provided at the output end of the micro-electric cylinder; the limit pressing and discharging mechanism comprises a linkage block fixedly arranged at the output end of the micro-electric cylinder, one side of the linkage block is fixedly connected to a linkage frame, the inner wall of the linkage frame is rotatably connected to a bidirectional screw, the two threads of the outer wall of the bidirectional screw are opposite and symmetrically opened, and an adjusting motor is fixedly installed at one end of the linkage frame, and the adjusting motor is used to drive the bidirectional screw to rotate; the outer wall of the bidirectional screw is threadedly connected to two socket blocks, and one side of each socket block is fixedly connected to an arc-shaped positioning block; a limit adjustment mechanism is provided at one end of the pressing strip; guide slides are provided on both sides of the micro-electric cylinder, and the outer wall of the guide slide is provided with a guide pressing assembly.

[0006] Preferably, the two sleeve blocks are slidably connected to the linkage frame, and the output end of the regulating motor is fixedly connected to the bidirectional screw; the cross-section of the two arc-shaped positioning blocks is an arc. An inclined guide plate is installed on one side of the press-fitting bar, and the inclined guide plate is fixedly connected to the press-fitting bar, and the inner wall of the inclined guide plate is a smooth surface. A controller is provided below the press-fitting bar, and a mounting plate is fixedly connected to the bottom end of the press-fitting plate, and the controller is fixedly installed with the press-fitting plate.

[0007] When the technical solution is in use, the micro-electric cylinder is started to push the linkage block forward, the linkage frame drives the bidirectional screw forward, and the linkage frame drives the bidirectional screw to move the two sleeve blocks forward, and the two arc-shaped positioning blocks move the assembled diaphragm forward. The controller starts the adjustment motor to drive the bidirectional screw to rotate, and the distance between the two sleeve blocks becomes larger, so that the assembled diaphragm can be discharged down to the inclined guide plate and discharged downward through the inner wall of the inclined guide plate.

[0008] Preferably, the limit adjustment mechanism comprises an adjustment electric cylinder arranged at one end of the pressing strip;

[0009] The adjusting electric cylinder is fixedly connected to the pressing plate, a push rod is fixedly connected to the output end of the adjusting electric cylinder, a push block is fixedly installed on the top of the push rod, a limit block is fixedly connected to one side of the push block, and a sleeve support block is arranged above the limit block; a distance sensor is fixedly installed on the inner wall of the sleeve support block, and the sleeve support block is fixedly connected to the pressing plate. The pushing block and the limit block are both slidably connected to the pressing plate, and the vertical cross-section of the limit block is L-shaped. The sleeve support block is used to support the distance sensor, and the limit block is slidably connected to the pressing strip.

[0010] When the technical solution is in use, the adjusting electric cylinder pushes the push rod upward, the push block drives the limit block upward, the support block is supported by the press-fit plate, and the distance sensor realizes distance sensing of the limit block. When the distance value sensed by the distance sensor is the same as the distance value set by the controller, the adjusting electric cylinder is closed by the controller.

[0011] Preferably, the guide pressing assembly includes a sleeve groove plate slidably arranged on the outer wall of the guide slide column; the guide slide column is fixedly connected to the pressing strip, a pressing block is installed inside the sleeve groove plate, a pressing rod is fixedly connected to the top of the pressing block, and the pressing rod and the sleeve groove plate are slidably connected; a sleeve pressure plate is fixedly installed on the top of the pressure rod, and a linkage pressure plate is fixedly connected to the upper surface of the sleeve pressure plate, a pressure block is fixedly installed on the top of the linkage pressure plate, a linkage rod is threadedly connected to the upper surface of the pressure block, an extrusion electric cylinder is installed on the top of the linkage rod, and the output end of the extrusion electric cylinder is fixedly connected to the linkage rod.

[0012] A support plate is provided on one side of the extrusion electric cylinder, and the extrusion electric cylinder and the pressing plate are fixedly connected to the support plate. Springs are provided on both sides of the pressure rod, and a pillar is provided on one side of the spring. The sleeve pressure plate and the sleeve groove plate are slidably connected to the pillar, and the sleeve pressure plate and the linkage pressure plate are slidably connected to the guide slide column. The sleeve groove plate and the sleeve pressure plate are slidably connected to the pressing plate, and the linkage pressure plate is slidably connected to the pressing plate. The sleeve pressure plate and the sleeve groove plate are fixedly connected to the springs, and the two springs are symmetrically arranged about the pressure rod.

[0013] When the technical solution is in use, the extrusion electric cylinder pushes the linkage rod downward, the linkage rod drives the pressure block downward, the linkage pressure plate drives the sleeve pressure plate downward, the pressure rod drives the press block downward, the sleeve pressure plate drives the pillar downward, the sleeve groove plate slides upward along the outer wall of the guide slide column, the pressure rod drives the press block to be pressed on the diaphragm, and is squeezed on the limit block through the sleeve groove plate, so that the press fitting is more accurate.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention uses a limited pressing and discharging mechanism. After the diaphragm between the two arc-shaped positioning blocks is assembled, the micro-electric cylinder is started to push the linkage block forward, the linkage block drives the linkage frame forward, the linkage frame drives the adjusting motor forward, and the two sleeve blocks respectively drive the two arc-shaped positioning blocks forward. The two arc-shaped positioning blocks enable the assembled diaphragm to move forward and out. The adjusting motor is started to drive the bidirectional screw to rotate. The two sleeve blocks move away from each other under the action of the thread transmission force. The two sleeve blocks respectively drive the two arc-shaped positioning blocks away from each other, so that the assembled diaphragm can be discharged down to the inclined guide plate. The entire assembled valve body diaphragm is pressed and installed, which can be accurately limited, so that accurate external discharge can be performed after limiting, which greatly improves the accuracy of the press-fitting of the assembled valve body diaphragm.

[0016] 2. The present invention adopts a limit adjustment mechanism, the adjusting electric cylinder pushes the push rod to move upward, the push block drives the limit block to move upward, the limit block moves upward, and the distance sensor realizes distance sensing of the limit block. When the distance value sensed by the distance sensor is the same as the distance value set by the controller, the adjusting electric cylinder is closed by the controller, so that the limit block accurately limits the sleeve groove plate, greatly improving the accuracy of the assembly of the valve body diaphragm.

[0017] 3. The present invention uses a guided press-fitting assembly and an extrusion electric cylinder to push the linkage rod downward, the linkage rod drives the pressure block downward, the pressure block drives the linkage pressure plate downward, the sleeve pressure plate causes the pressure rod to move downward, the pressure rod drives the press-fitting block downward, and the sleeve pressure plate drives the spring downward, the sleeve groove plate realizes guided upward sliding along the outer wall of the guide slide column, the pressure rod drives the press-fitting block to be press-fitted on the diaphragm, thereby installing the diaphragm on the assembled valve body, and the press-fitting is more accurate.

[0018] The interaction of the above multiple functions first enables the limit block to accurately limit the sleeve groove plate, then enables the pressure rod to drive the press block to press the diaphragm, thereby installing the diaphragm on the assembled valve body, and finally the two arc-shaped positioning blocks enable the assembled diaphragm to move forward, and the two sleeve blocks respectively drive the two arc-shaped positioning blocks away from each other. In summary, the entire assembly valve body diaphragm press can be accurately limited, so that accurate external discharge can be performed after limiting, greatly improving the accuracy of the assembly valve body diaphragm press. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the pneumatic press-fitting device for assembling the valve body diaphragm of the present invention.

[0020] Figure 2 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0021] Figure 3 It is a schematic diagram of the main structure of the position-limiting press-fitting and discharging mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the partial structure of the connection between the limit block and the push block of the present invention.

[0023] Figure 5 It is a bottom view structural schematic diagram of the position-limiting press-fitting and discharging mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the cross-section structure of the position-limiting press-fitting and discharging mechanism of the present invention when viewed from above.

[0025] Figure 7 It is a schematic diagram of the partial structure of the cross section of the connection between the sleeve slot plate and the support of the present invention.

[0026] Figure 8 It is a rear structural schematic diagram of the pneumatic pressing device for assembling the valve body diaphragm of the present invention.

[0027] The accompanying drawings are marked as follows: 1. Press-fitting plate; 2. Press-fitting strip; 3. Micro electric cylinder; 4. Linkage block; 5. Linkage frame; 6. Bidirectional screw; 7. Adjustment motor; 8. Socket block; 9. Arc positioning block; 10. Inclined guide plate; 11. Controller; 12. Mounting plate; 13. Adjustment electric cylinder; 14. Push rod; 15. Push block; 16. Limit block; 17. Socket support block; 18. Distance sensor; 19. Guide slide column; 20. Socket groove plate; 21. Press-fitting block; 22. Press rod; 23. Socket pressure plate; 24. Linkage pressure plate; 25. Press block; 26. Linkage rod; 27. Extrusion electric cylinder; 28. Support plate; 29. ​​Spring; 30. Pillar. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] As attached Figure 1 - Attachment Figure 8 A pneumatic pressing device for assembling a valve body diaphragm is shown. The pneumatic pressing device for assembling a valve body diaphragm is provided with a limited pressing and discharging mechanism, a limit adjustment mechanism, and a guide pressing assembly. The arrangement of each mechanism and assembly enables the entire assembled valve body diaphragm to be accurately limited during press-assembly, thereby accurately discharging after limiting the position, greatly improving the accuracy of press-assembly of the assembled valve body diaphragm. The specific structural arrangement of each mechanism and assembly is as follows.

[0030] In this embodiment, as shown in the attached Figure 1 - Attachment Figure 3 As shown, the pressing strip 2 is fixed on one side of the pressing plate 1, the micro-electric cylinder 3 is fixedly connected to the upper surface of the pressing strip 2, and the output end of the micro-electric cylinder 3 is provided with a limited pressing and discharging mechanism; the limited pressing and discharging mechanism includes a linkage block 4 fixedly arranged at the output end of the micro-electric cylinder 3, a linkage frame 5 is fixedly connected to one side of the linkage block 4, a bidirectional screw 6 is rotatably connected to the inner wall of the linkage frame 5, and the two threads of the outer wall of the bidirectional screw 6 are opposite and symmetrically opened, and an adjustment motor 7 is fixedly installed at one end of the linkage frame 5, and the adjustment motor 7 is used to drive the bidirectional screw 6 to rotate; the outer wall of the bidirectional screw 6 is threadedly connected to two sleeve blocks 8, and one side of each sleeve block 8 is fixedly connected to an arc-shaped positioning block 9; one end of the pressing strip 2 is provided with a limit adjustment mechanism; both sides of the micro-electric cylinder 3 are provided with guide slides 19, and the outer wall of the guide slide 19 is provided with a guide pressing assembly. The two sleeve blocks 8 are both slidably connected to the linkage frame 5, and the output end of the adjustment motor 7 is fixedly connected to the bidirectional screw 6; the cross-section shape of the two arc-shaped positioning blocks 9 is an arc.

[0031] In this embodiment, as shown in the attached Figure 1 - Attachment Figure 5 As shown, an inclined guide plate 10 is installed on one side of the press-fitting strip 2, and the inclined guide plate 10 is fixedly connected to the press-fitting strip 2. The inner wall of the inclined guide plate 10 is a smooth surface, so that the arc-shaped positioning block 9 is located above the inclined guide plate 10. A mounting plate 12 is fixedly connected to the bottom end of the press-fitting plate 1, and the controller 11 is fixedly installed between the press-fitting plate 1 to fix the mounting plate 12. The mounting plate 12 supports the press-fitting plate 1, increases the stability of the press-fitting plate 1, and prevents the press-fitting plate 1 from shaking.

[0032] In this embodiment, as shown in the attached Figure 4As shown, the limit adjustment mechanism includes an adjustment electric cylinder 13 arranged at one end of the pressing strip 2; the adjustment electric cylinder 13 is fixedly connected to the pressing plate 1, the output end of the adjustment electric cylinder 13 is fixedly connected to a push rod 14, and a push block 15 is fixedly installed on the top of the push rod 14, a limit block 16 is fixedly connected to one side of the push block 15, and a sleeve support block 17 is arranged above the limit block 16; a distance sensor 18 is fixedly installed on the inner wall of the sleeve support block 17, and the sleeve support block 17 is fixedly connected to the pressing plate 1. The push block 15 and the limit block 16 are both slidably connected to the pressing plate 1, and the vertical cross-section of the limit block 16 is L-shaped. The sleeve support block 17 is used to support the distance sensor 18, and the limit block 16 is slidably connected to the pressing strip 2.

[0033] In this embodiment, as shown in the attached Figure 6 - Attachment Figure 8 As shown, the guide pressing assembly includes a sleeve groove plate 20 slidably set on the outer wall of the guide slide column 19; the guide slide column 19 is fixedly connected to the pressing strip 2, and a pressing block 21 is installed inside the sleeve groove plate 20, and a pressing rod 22 is fixedly connected to the top of the pressing block 21, and the pressing rod 22 is slidably connected to the sleeve groove plate 20.

[0034] A sleeve pressure plate 23 is fixedly installed on the top of the pressure rod 22, and a linkage pressure plate 24 is fixedly connected to the upper surface of the sleeve pressure plate 23. A pressure block 25 is fixedly installed on the top of the linkage pressure plate 24. A linkage rod 26 is threadedly connected to the upper surface of the pressure block 25. An extrusion electric cylinder 27 is installed on the top of the linkage rod 26. The output end of the extrusion electric cylinder 27 is fixedly connected to the linkage rod 26. A support plate 28 is provided on one side of the extrusion electric cylinder 27. The extrusion electric cylinder 27 and the press plate 1 are fixedly connected to the support plate 28. Springs 29 are provided on both sides of the pressure rod 22. A pillar 30 is provided on one side of the spring 29. The sleeve pressure plate 23 and the sleeve groove plate 20 are slidably connected to the pillar 30. The sleeve pressure plate 23 and the linkage pressure plate 24 are slidably connected to the guide slide column 19. The sleeve groove plate 20 and the sleeve pressure plate 23 are slidably connected to the press plate 1, and the linkage pressure plate 24 is slidably connected to the press plate 1. The sleeve pressure plate 23 and the sleeve groove plate 20 are both fixedly connected to the springs 29 , and the two springs 29 are symmetrically arranged about the pressure rod 22 .

[0035] The working principle of the pneumatic pressing device for assembling the valve body diaphragm of the present invention is as follows:

[0036] Step 1: During installation, insert bolts into the mounting plate 12 to fix the mounting plate 12. The mounting plate 12 supports the press-fit plate 1 to increase the stability of the press-fit plate 1. The assembled valve body is placed in the two arc-shaped positioning blocks 9. At the same time, the diaphragm is placed above the assembled valve body to complete the installation.

[0037] Step 2, during limit adjustment, the adjusting electric cylinder 13 is started through the controller 11, the adjusting electric cylinder 13 pushes the push rod 14 to move upward, the push rod 14 drives the push block 15 to move upward, the push block 15 drives the limit block 16 to move upward, the limit block 16 moves upward, and the sleeve support block 17 is supported by the press-fit plate 1, the sleeve support block 17 supports the distance sensor 18, the distance sensor 18 realizes distance sensing for the limit block 16, when the distance value sensed by the distance sensor 18 is the same as the distance value set by the controller 11, the adjusting electric cylinder 13 is closed through the controller 11.

[0038] Step three, during the guided pressing, the extrusion electric cylinder 27 is started through the controller 11, the pressing plate 1 provides supporting force to the support plate 28, the support plate 28 supports the extrusion electric cylinder 27, the extrusion electric cylinder 27 pushes the linkage rod 26 to move downward, the linkage rod 26 drives the pressure block 25 to move downward, the pressure block 25 drives the linkage pressure plate 24 to move downward, the linkage pressure plate 24 drives the sleeve pressure plate 23 to move downward, the sleeve pressure plate 23 makes the pressure rod 22 move downward, the pressure rod 22 drives the press block 21 to move downward, and the sleeve pressure plate 23 drives the spring 29 to move downward.

[0039] The sleeve pressure plate 23 drives the pillar 30 to move downward, and the pillar 30 makes the sleeve groove plate 20 move downward. The sleeve groove plate 20 slides upward along the outer wall of the guide slide column 19, and the sleeve pressure plate 23 and the linkage pressure plate 24 slide downward along the outer wall of the guide slide column 19. In this way, the pressure rod 22 drives the press block 21 to be pressed on the diaphragm, so that the diaphragm is installed on the assembled valve body, and the sleeve groove plate 20 is squeezed on the limit block 16, and the limit block 16 performs limit stamping on the sleeve groove plate 20, so that the press fitting is more accurate. Then the controller 11 starts the extrusion electric cylinder 27 to drive the linkage rod 26 to move up and reset, the linkage rod 26 drives the pressure block 25 to move the linkage pressure plate 24 upward, the linkage pressure plate 24 drives the sleeve pressure plate 23 upward, the sleeve pressure plate 23 drives the pressure rod 22 to move the sleeve groove plate 20 upward, and at the same time, the sleeve groove plate 20 drives the press block 21 to move up and reset.

[0040] Step 4, during the limited position pressing and discharging, when the diaphragm between the two arc-shaped positioning blocks 9 is assembled, the linkage block 4 is pushed forward by starting the micro-electric cylinder 3, and the linkage block 4 drives the linkage frame 5 to move forward, and the linkage frame 5 drives the bidirectional screw 6 to move forward, and at the same time, the linkage frame 5 drives the adjustment motor 7 to move forward, and the linkage frame 5 drives the bidirectional screw 6 to move the two sleeve blocks 8 forward, and the two sleeve blocks 8 respectively drive the two arc-shaped positioning blocks 9 to move forward, and the two arc-shaped positioning blocks 9 make the assembled diaphragm move forward, so that the arc-shaped positioning block 9 is located above the inclined guide plate 10. The controller 11 starts the adjustment motor 7 to drive the bidirectional screw 6 to rotate, and the bidirectional screw 6 drives the two sleeve blocks 8 to move away from each other under the action of the thread transmission force, and the distance between the two sleeve blocks 8 becomes larger. The two sleeve blocks 8 respectively drive the two arc-shaped positioning blocks 9 to move away from each other, and the assembled diaphragm can be discharged down to the inclined guide plate 10 and discharged downward through the inner wall of the inclined guide plate 10.

[0041] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic pressing device for assembling a valve body diaphragm, comprising a pressing plate (1), a pressing strip (2) and a micro electric cylinder (3), wherein the pressing strip (2) is fixed to one side of the pressing plate (1), and the micro electric cylinder (3) is fixedly connected to the upper surface of the pressing strip (2), characterized in that: The output end of the micro electric cylinder (3) is provided with a limit pressing and discharging mechanism; The position-limiting press-loading and discharging mechanism comprises a linkage block (4) fixedly arranged at the output end of the micro-electric cylinder (3); a linkage frame (5) is fixedly connected to one side of the linkage block (4); a bidirectional screw (6) is rotatably connected to the inner wall of the linkage frame (5); two threads on the outer wall of the bidirectional screw (6) are opposite and symmetrically arranged; an adjustment motor (7) is fixedly installed at one end of the linkage frame (5); the adjustment motor (7) is used to drive the bidirectional screw (6) to rotate; The outer wall of the bidirectional screw (6) is threadedly connected to two sleeve blocks (8), and one side of each sleeve block (8) is fixedly connected to an arc-shaped positioning block (9); One end of the pressing strip (2) is provided with a limit adjustment mechanism; Guide slide columns (19) are provided on both sides of the micro electric cylinder (3), and guide press-fit components are provided on the outer walls of the guide slide columns (19).

2. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 1, characterized in that: The two sleeve blocks (8) are both slidably connected to the linkage frame (5), and the output end of the regulating motor (7) is fixedly connected to the bidirectional screw (6); The cross-sectional shape of the two arc-shaped positioning blocks (9) is an arc shape.

3. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 1, characterized in that: An inclined guide plate (10) is installed on one side of the pressing strip (2), and the inclined guide plate (10) is fixedly connected to the pressing strip (2), and the inner wall of the inclined guide plate (10) is a smooth surface.

4. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 1, characterized in that: A controller (11) is provided below the pressing strip (2), a mounting plate (12) is fixedly connected to the bottom end of the pressing plate (1), and the controller (11) is fixedly mounted to the pressing plate (1).

5. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 1, characterized in that: The limit adjustment mechanism comprises an adjustment electric cylinder (13) arranged at one end of the pressing strip (2); The adjusting electric cylinder (13) is fixedly connected to the pressing plate (1), the output end of the adjusting electric cylinder (13) is fixedly connected to a push rod (14), and a push block (15) is fixedly installed on the top of the push rod (14), a limit block (16) is fixedly connected to one side of the push block (15), and a sleeve support block (17) is provided above the limit block (16); A distance sensor (18) is fixedly mounted on the inner wall of the sleeve support block (17), and the sleeve support block (17) is fixedly connected to the press plate (1).

6. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 5, characterized in that: The push block (15) and the limit block (16) are both slidably connected to the press plate (1), and the vertical cross-section of the limit block (16) is L-shaped.

7. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 5, characterized in that: The sleeve support block (17) is used to support the distance sensor (18), and the limit block (16) is slidably connected to the pressing strip (2).

8. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 1, characterized in that: The guide press-fitting assembly comprises a sleeve groove plate (20) slidably arranged on the outer wall of the guide slide column (19); The guide slide column (19) is fixedly connected to the pressing strip (2), a pressing block (21) is installed inside the sleeve groove plate (20), a pressing rod (22) is fixedly connected to the top of the pressing block (21), and the pressing rod (22) is slidably connected to the sleeve groove plate (20); A sleeve pressure plate (23) is fixedly mounted on the top of the pressure rod (22), and a linkage pressure plate (24) is fixedly connected to the upper surface of the sleeve pressure plate (23), a pressure block (25) is fixedly mounted on the top of the linkage pressure plate (24), a linkage rod (26) is threadedly connected to the upper surface of the pressure block (25), an extrusion electric cylinder (27) is mounted on the top of the linkage rod (26), and an output end of the extrusion electric cylinder (27) is fixedly connected to the linkage rod (26); A support plate (28) is provided on one side of the extrusion electric cylinder (27); the extrusion electric cylinder (27) and the pressing plate (1) are fixedly connected to the support plate (28); springs (29) are provided on both sides of the pressing rod (22); a pillar (30) is provided on one side of the spring (29); the sleeve pressing plate (23) and the sleeve groove plate (20) are slidably connected to the pillar (30); and the sleeve pressing plate (23) and the linkage pressing plate (24) are slidably connected to the guide slide column (19).

9. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 8, characterized in that: The sleeve groove plate (20) and the sleeve pressure plate (23) are both slidably connected to the press plate (1), and the linkage pressure plate (24) is slidably connected to the press plate (1).

10. The pneumatic press-fitting device for assembling a valve body diaphragm according to claim 8, characterized in that: The sleeve pressure plate (23) and the sleeve groove plate (20) are both fixedly connected to the spring (29), and the two springs (29) are symmetrically arranged with respect to the pressure rod (22).

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