Flexible clamping jaw for shaft or pipe workpieces

Abstract

The flexible clamping jaw comprises a connecting seat made of hard materials, a clamping air bag is fixed on the connecting seat, the clamping air bag comprises an inner wall, an outer wall and a connecting wall connecting the inner wall and the lower end of the outer wall, an annular cavity is defined by the inner wall, the outer wall and the connecting wall, and the inner wall, the outer wall and the connecting wall are arranged in the annular cavity. The connecting seat is provided with a limiting wall for limiting the expansion deformation of the outer wall, the connecting seat is provided with a driving gas path channel communicated with the annular cavity, the inner wall defines a clamping cavity for sealing and clamping shaft or pipe workpieces, and the connecting seat is further provided with a detection gas path channel communicated with a pipe section of a pressure sensor. The flexible clamping jaw can rapidly clamp the pressure sensor so that the pipe section of the pressure sensor can be rapidly in butt joint with the detection gas circuit, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping jaws, in particular to a flexible clamping jaw for shaft or pipe workpieces. Background Art

[0002] Flexible clamping of shaft or tube workpieces can be achieved by inwardly expanding and clamping an airbag. For example, the invention disclosure document with publication number CN113478515A discloses an airbag-type external support clamp. However, the structure of this external support clamp is relatively complex, and the silicone body requires multiple parts to be fixed, pressed and installed, which is also complicated to operate during assembly. In addition, the above-mentioned external support clamp is difficult to implement for some special workpieces. For example, a pressure sensor with a pipe segment is used to connect the medium and then detect the pressure of the medium inside the pipe segment. However, when the pressure sensor performs numerical detection, the pipe segment needs to be connected to the detection air circuit. By changing the pressure in the detection air circuit, the numerical change of the pressure sensor is detected, and the accuracy of the pressure sensor is then tested. Currently, the pipe segment of the pressure sensor and the detection air circuit need to be connected and docked. The current operation is for the operator to manually dock and connect the pipe segment and the hose connecting the air circuit. The operation is very cumbersome and inefficient. The above-mentioned airbag-type external support clamp cannot meet the detection and clamping requirements. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a flexible clamping jaw for shaft or pipe workpieces, the flexible clamping jaw has a simpler structure and lower cost.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a flexible clamping claw for shaft or tube workpieces, including a connecting seat made of hard material, the connecting seat is fixed with a clamping airbag, the clamping airbag includes an inner wall, an outer wall and a connecting wall connecting the inner wall and the lower end of the outer wall, the inner wall, the outer wall and the connecting wall form an annular chamber, the connecting seat is provided with a limiting wall for limiting the expansion and deformation of the outer wall, the connecting seat is provided with a driving air path channel connected to the annular chamber, and the inner wall forms a clamping cavity for sealing and clamping shaft or tube workpieces.

[0005] As a preferred solution, the shaft-type or pipe-type workpiece is a pressure sensor with a pipe section, and the connecting seat is further provided with a detection air path channel connected to the pipe section of the pressure sensor.

[0006] As a preferred solution, an inner ring groove and an outer ring groove are provided on the connecting seat, the inner wall is embedded in and fixed in the inner ring groove, and the outer wall is embedded in and fixed in the outer ring groove.

[0007] As a preferred solution, the inner wall and the outer wall are fixed in the inner ring groove and the outer ring groove by gluing.

[0008] As a preferred solution, the inner ring groove and / or the outer ring groove is provided with a glue receiving groove for conveniently receiving glue.

[0009] As a preferred solution, a rough surface is further provided on the inner surface and / or outer surface of the upper ends of the inner wall and the outer wall.

[0010] As a preferred solution, at least one annular sealing protrusion is provided on the inner side surface of the inner wall.

[0011] As a preferred solution, the detection air path channel is a threaded air path channel, and the center line of the threaded air path channel coincides with the center line of the clamping cavity.

[0012] As a preferred solution, the driving air path channel includes a first channel and a second channel, the opening of the first channel faces one side of the connecting seat, and the second channel is arranged between the inner ring groove and the outer ring groove. The extension direction of the two channels is parallel to the center line and is connected to the annular chamber.

[0013] As a preferred solution, an annular sealing ring is embedded in the connecting seat above the clamping cavity and is sealed with the upper end of the pipe section.

[0014] After adopting the above technical solution, the effect of the utility model is: since the flexible clamping claw includes a connecting seat made of hard material, the connecting seat is fixed with a clamping airbag, and the clamping airbag includes an inner wall, an outer wall and a connecting wall connecting the lower end of the inner wall and the outer wall, the inner wall, the outer wall and the connecting wall form an annular chamber, and the connecting seat is provided with a limiting wall for limiting the expansion and deformation of the outer wall, and the connecting seat is provided with a driving air path channel connected to the annular chamber, and the inner wall forms a clamping cavity for sealing and clamping shaft or tube workpieces. Therefore, the clamping airbag of the flexible clamping claw is integrally molded to form an annular chamber and can be directly fixed on the connecting seat, thereby eliminating the need for an additional fixing structure, making the structure simpler, the cost lower, and eliminating the need for subsequent assembly work.

[0015] Since the shaft or tube workpiece is a pressure sensor with a tube segment, the connecting seat is also provided with a detection air path channel connected to the tube segment of the pressure sensor. Therefore, when in use, it is only necessary to connect the detection air path channel of the connecting seat with the detection air path and connect the drive air path channel with the drive air path. In this way, when performing detection, it is only necessary to put the clamping cavity of the flexible clamp on the tube segment of the pressure sensor, and drive the air path to ventilate the inside of the annular chamber. At this time, the inner wall of the annular chamber will expand due to no restriction, and the expanded inner wall will clamp the tube segment and seal it. At this time, the detection air path is connected to the tube segment, and air can be supplied to the inside of the tube segment of the pressure sensor to adjust the pressure, thereby detecting the pressure sensor. Therefore, the flexible clamp can be used in multiple arrays. It is only necessary to arrange multiple pressure sensors in an array with the tube segments facing upwards, and the multiple flexible clamps are lowered so that the clamping cavity on each flexible clamp will be put on the corresponding tube segment. Then, after clamping the tube segment, detection can be performed, omitting the process of sleeve and tube removal, greatly improving detection efficiency.

[0016] Furthermore, since the connecting base is provided with an inner ring groove and an outer ring groove, the inner wall is embedded and fixed in the inner ring groove, and the outer wall is embedded and fixed in the outer ring groove. The inner ring groove and / or the outer ring groove are provided with a glue receiving groove for conveniently receiving glue. Therefore, the inner wall and the outer wall can be better fixed by glue, and the glue receiving groove can hold glue to ensure a strong bond.

[0017] Furthermore, since a rough surface is provided on the inner surface and / or outer surface of the upper ends of the inner wall and the outer wall, the rough surface can improve the firmness of the bonding.

[0018] Furthermore, since at least one annular sealing protrusion is provided on the inner side surface of the inner wall, the sealing protrusion further improves the sealing performance during clamping, thereby preventing the gas entering the detection gas path from leaking and affecting the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural stereogram of an embodiment of the utility model;

[0021] Figure 2 It is a top view of an embodiment of the utility model;

[0022] Figure 3 This Figure 2 Cross-sectional view at AA;

[0023] Figure 4 It is a cross-sectional view of another structural form;

[0024] Figure 5 yes Figure 4 An enlarged schematic diagram at B;

[0025] In the accompanying drawings: 1. Connecting seat; 11. Detection air path channel; 12. Driving air path channel; 121. Second channel; 122. First channel; 13. Limiting wall; 14. Inner ring groove; 15. Outer ring groove; 16. Glue holding groove; 17. Sealing ring; 18. Connecting screw hole; 2. Pressure sensor; 21. Pipe section; 3. Clamping airbag; 31. Outer wall; 32. Inner wall; 33. Annular chamber; 34. Connecting wall; 35. Clamping cavity; 36. Sealing protrusion. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below through specific embodiments.

[0027] like Figures 1 to 4 As shown, a flexible clamping claw of a pressure sensor 2 includes a connecting base 1 made of a hard material, preferably made of metal. The connecting base 1 is fixed with a clamping airbag 3, which is made of a flexible material, such as silicone. The clamping airbag 3 includes an inner wall 32, an outer wall 31, and a connecting wall 34 connecting the inner wall 32 and the lower end of the outer wall 31. The inner wall 32, the outer wall 31, and the connecting wall 34 enclose an annular chamber 33. The connecting base 1 is provided with a limiting wall 13 for limiting the expansion and deformation of the outer wall 31. The connecting base 1 is provided with a driving air path 12 connected to the annular chamber 33. The inner wall 32 encloses a clamping cavity 35 for sealing and clamping the pipe section 21 of the pressure sensor 2. The connecting base 1 is also provided with a detection air path 11 connected to the pipe section 21 of the pressure sensor 2.

[0028] The pressure sensor 2 in this embodiment is a currently available result, and the portion clamped by the flexible clamping claws of this embodiment is the pipe section 21 used for detection of the pressure sensor 2 .

[0029] like Figure 3 As shown, the connecting base 1 is provided with an inner annular groove 14 and an outer annular groove 15. The inner wall 32 is embedded in and fixed in the inner annular groove 14, and the outer wall 31 is embedded in and fixed in the outer annular groove 15. The inner wall 32 and the outer wall 31 are fixed to the inner annular groove 14 and the outer annular groove 15 by glue. The inner annular groove 14 and / or the outer annular groove 15 are provided with a glue receiving groove 16 for conveniently receiving glue.

[0030] The limiting wall 13 is an annular limiting wall 13 that matches the length of the outer wall 31 , and limits and bonds to the outer side surface of the outer wall 31 , thereby preventing the outer wall 31 from deforming.

[0031] The inner and / or outer surfaces of the upper ends of the inner wall 32 and the outer wall 31 are also provided with rough surfaces. The rough surfaces are embedded in the inner and outer ring grooves 14 and 15, so as to facilitate bonding between the inner and outer ring grooves 14 and 15 and improve bonding strength.

[0032] The detection air path channel 11 is a threaded air path channel that runs from top to bottom. Preferably, the centerline of the detection air path channel 11 coincides with the centerline of the clamping cavity 35. The threaded air path channel is threadedly connected to the detection air path connector, thereby facilitating communication with the detection air path system. The drive air path channel 12 includes a first channel 122 and a second channel 121. The opening of the first channel 122 faces one side of the connecting seat 1, and the second channel 121 is arranged between the inner annular groove 14 and the outer annular groove 15. The extension direction of the two channels is parallel to the centerline and is connected to the annular chamber 33.

[0033] Of course, if Figure 5 As shown, an annular sealing ring 17 is embedded in the upper end of the clamping cavity 35 of the connecting seat 1. When the upper end of the pipe section 21 of the pressure sensor 2 presses the connecting seat 1, the sealing ring 17 will be squeezed, thereby further sealing to prevent gas leakage.

[0034] At least one annular sealing protrusion 36 is provided on the inner side surface of the inner wall 32 . When the inner wall 32 clamps the pipe section 21 of the pressure sensor 2 , the sealing protrusion 36 also squeezes the outer wall 31 of the pipe section 21 , thereby further improving the sealing performance.

[0035] like Figure 1 As shown, a plurality of connecting screw holes 18 are provided on the upper end of the connecting base 1 to facilitate fixing the connecting base 1 on the robotic arm.

[0036] The working principle of the embodiment of the present utility model is: first, the tube section 21 of the pressure sensor 2 is facing upward, and a corresponding number of flexible clamps are selected according to the number of pressure sensors 2. Each flexible clamp is installed on the robotic arm in the same arrangement, and the driving air path channel 12 and the detection air path channel 11 of each flexible clamp are respectively connected to the driving air path system and the detection air path system, wherein the driving air path system is used to control the expansion of the clamping airbag 3, and the detection air path system is used to control the size of the detection air pressure; at the same time, the flexible clamp is moved to the top of the tube section 21 of the pressure sensor 2, so that the clamping cavity 35 corresponds to the tube section 21, and then the flexible clamp is lowered to squeeze and seal the tube section 21 of the pressure sensor 2 with the sealing ring 17 on the connecting seat 1, and then the inner wall 32 of the clamping airbag 3 expands the clamping tube section 21, so that the outside of the tube section 21 is sealed, so that the detection air path system is sealed and connected to the tube section 21 of the pressure sensor 2, thereby meeting the detection requirements.

[0037] The flexible clamp can be used to clamp some shaft or pipe workpieces, or clamp some workpieces with shaft segments or pipe segments, or workpieces such as pressure sensors that require air supply detection.

[0038] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention, without departing from the spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A flexible clamping jaw for shaft or tube workpieces, comprising a connecting seat made of a hard material, characterized in that: The connecting seat is fixed with a clamping airbag, and the clamping airbag includes an inner wall, an outer wall and a connecting wall connecting the lower ends of the inner wall and the outer wall. The inner wall, the outer wall and the connecting wall form an annular chamber. The connecting seat is provided with a limiting wall for limiting the expansion and deformation of the outer wall. The connecting seat is provided with a driving air path channel connected to the annular chamber. The inner wall forms a clamping cavity for sealing and clamping shaft or pipe workpieces.

2. A flexible clamp for shaft or tube workpieces according to claim 1, characterized in that: The shaft or tube workpiece is a pressure sensor with a tube section, and the connecting seat is further provided with a detection air path channel connected to the tube section of the pressure sensor.

3. The flexible clamp for shaft or tube workpieces according to claim 2, characterized in that: An inner ring groove and an outer ring groove are provided on the connecting seat. The inner wall is embedded in and fixed in the inner ring groove, and the outer wall is embedded in and fixed in the outer ring groove.

4. The flexible clamp for shaft or tube workpieces according to claim 3, characterized in that: The inner wall and the outer wall are adhered and fixed in the inner ring groove and the outer ring groove by glue.

5. The flexible clamping jaw for shaft or tube workpieces according to claim 4, characterized in that: The inner ring groove and / or the outer ring groove is provided with a glue receiving groove for conveniently receiving glue.

6. The flexible clamp for shaft or tube workpieces according to claim 5, characterized in that: A rough surface is further provided on the inner surface and / or outer surface of the upper ends of the inner wall and the outer wall.

7. The flexible clamp for shaft or tube workpieces according to claim 6, characterized in that: At least one annular sealing protrusion is provided on the inner side surface of the inner wall.

8. The flexible clamp for shaft or tube workpieces according to claim 7, characterized in that: The detection air path channel is a threaded air path channel, and the center line of the threaded air path channel coincides with the center line of the clamping cavity.

9. The flexible clamp for shaft or tube workpieces according to claim 8, characterized in that: The driving air path includes a first channel and a second channel. The opening of the first channel faces one side of the connecting seat, and the second channel is arranged between the inner ring groove and the outer ring groove. The extension direction of the two channels is parallel to the center line and is connected to the annular chamber.

10. The flexible clamp for shaft or tube workpieces according to claim 9, characterized in that: An annular sealing ring which is in sealing cooperation with the upper end of the pipe section is also embedded in the connecting seat above the clamping cavity.

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