CN114764053A

CN114764053A - Vacuum suction device

Info

Publication number: CN114764053A
Application number: CN202110041736.3A
Authority: CN
Inventors: 庄俊龙; 武天皓; 赵忠海; 赵立龙; 梁国伟; 徐晨晖
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2022-07-19

Abstract

The invention discloses a vacuum suction device which comprises a vacuum adsorption mechanism, a fixing mechanism and a pulling force applying mechanism. Wherein the vacuum suction mechanism is configured to be capable of sucking the part to be detected through the suction port. The fixing mechanism can fix the vacuum suction device on the supporting mechanism. The pulling force applying mechanism is provided at the other end portion of the vacuum suction apparatus in the axial direction of the vacuum suction apparatus, and is connected to the vacuum suction mechanism. The vacuum suction apparatus of the present disclosure performs a load test by applying a tensile force to the panel. The vacuum suction device is arranged outside the wall plate, so that a tester can adjust the tensile force applied to the part to be detected by pulling the tensile force applying mechanism.

Description

Vacuum suction device

Technical Field

The invention relates to the field of test detection devices, in particular to a vacuum suction device suitable for a wallboard loading test.

Background

The composite profile is subject to strict regulations in some relevant acceptance criteria for aircraft. For example, the appearance of the wallboard composite material part is inspected according to an appearance inspection mold, inspection cutting surfaces are arranged on the inspection mold along the spreading direction at intervals of not more than 300mm, and the mold sticking gap is not more than 0.2 mm. When the inspection is performed, a local pressure of 45N at maximum is allowed to be applied within a minimum interval of 300mm (or equivalently a smaller interval) of the fitting connection region.

The conventional wall plate loading test is performed by mounting a pressure plate from the inner side of the wall plate and applying a local pressure to the wall plate by using the pressure plate. In the method, a frame for installing the pressing plate is required to be built on the inner side of the wall plate, the wall plate can be installed after the pressing plate in the frame structure is moved away before the wall plate is inspected, and the frame structure is adjusted to the position where the wall plate can be pressed after the wall plate is installed. According to this loading test, the distance between the platen and the wall plate must be controlled to ensure sufficient space for applying pressure. In addition, the number of the pressing plates in the frame structure is as large as ten, and the opening and closing operation of the pressing plates for each time of wall plate detection is complicated. In addition, the inside of the panel has components such as stringers, which may press against the stringers and damage the panel structure when the press plate is used.

In addition, the force fixing device adopted by the existing wallboard loading test device is a force meter consisting of a spring and a pressure bar. When the force-measuring pressure rod acts on the wall plate, the force applied by the pressure rod is controlled not to be more than 45N according to the scale value on the force-measuring device. The loading test device needs to build a frame for installing the force meter on the inner side of the wall plate, and is used for ensuring the force application wall plate of the pressure rod of the force meter. This form of loading results in the force meter only applying a pushing force forward on the wall plate and not a pulling force.

Therefore, there is a need to design a new wallboard load test to overcome the above difficulties.

Disclosure of Invention

One of the objects of the present invention is to provide a vacuum suction device which can apply a pulling force to the part to be tested on its outside, thus eliminating the need to set up a complex frame on the inside of the panel during the loading process.

The purpose of the invention is realized by the following technical scheme: a vacuum suction device comprises a vacuum adsorption mechanism, a fixing mechanism and a pulling force applying mechanism. Wherein the vacuum suction mechanism is provided at one end portion of the vacuum suction apparatus in an axial direction of the vacuum suction apparatus, and is configured to be capable of sucking the part to be inspected through the suction port. The fixing mechanism is configured to fix the vacuum suction device on a supporting mechanism, wherein the supporting mechanism is used for supporting the vacuum suction device and is positioned outside the part to be detected. The tensile force applying mechanism is arranged at the other end of the vacuum suction device along the axial direction of the vacuum suction device, is connected with the vacuum suction mechanism, and is configured to be capable of adjusting the tensile force applied to the part to be detected at the outer side of the part to be detected through the vacuum suction mechanism.

The vacuum suction device of the present disclosure changes the previous mode of performing a load test by applying pressure, which performs a load test by applying tension to a panel. The vacuum suction device is arranged on the outer side of the wall plate, so that a tester does not need to install a frame which needs to avoid various interference structures and is convenient for a tensile machine to apply pressure load on the inner side of the wall plate. After the vacuum suction device is sucked on a part (wall plate) to be detected through the vacuum suction mechanism and is fixed on the supporting mechanism through the fixing mechanism, a tester can adjust the pulling force applied to the part to be detected by pulling the pulling force applying mechanism.

Preferably, the tensile force applying mechanism includes:

the moving shaft is connected with the vacuum adsorption mechanism, and when the moving shaft moves along one side departing from the vacuum adsorption mechanism, the pulling force applied to the part to be detected can be adjusted;

a guide cylinder which can be fixed to the support mechanism and in which a guide passage for guiding the movable shaft is formed, a wall surface of the guide passage being provided with a positioning hole along an extending direction of the guide passage;

a positioning pin configured to be movable in the extending direction within the positioning hole and to be connected with the moving shaft through the positioning hole;

A lock configured to maintain a position of the positioning pin in the extending direction.

As for the above-mentioned locking member, it may be in the form of a locking nut having an internal threaded portion. At this time, an external thread part engaged with the internal thread part of the lock nut is formed on the outer wall surface of the guide cylinder.

Preferably, the positioning holes are provided in pairs at diametrically opposite ends of the guide cylinder, and the positioning pins can pass through both positioning holes at the diametrically opposite ends.

The moving shaft is provided with a shoulder portion at an end adjacent to the vacuum suction mechanism, the shoulder portion being formed as a single plate-like member extending circumferentially around the moving shaft, or a plurality of plate-like members provided at different circumferential positions of the moving shaft.

Preferably, the vacuum suction device further comprises a second return spring, and two ends of the second return spring respectively abut against the shoulder part and the guide cylinder.

Preferably, the vacuum suction device further comprises a sleeve for guiding the shoulder portion, the sleeve having a first end wall and a second end wall at two axial ends thereof, wherein the first end wall is sleeved on the vacuum absorption mechanism, and the second end wall is slidably sleeved on the guide cylinder.

Preferably, both ends of the second return spring abut against the shoulder portion and the second end wall, respectively.

Preferably, the second return spring is sleeved on the moving shaft.

Preferably, the outer wall of the guide cylinder projects outwardly to form a flange portion, wherein the flange portion and the second end wall are axially opposed and provided with corresponding through holes, and a fastening member can pass through the through holes of the flange portion and the second end wall to fix the vacuum suction device to the support mechanism.

Preferably, the vacuum suction device further comprises a plate member capable of being clamped between the second end wall and the flange portion.

Preferably, the wall surface of the sleeve is provided with a guide hole extending in the extending direction of the sleeve, and the shoulder portion is provided with a guide rod protruding outward in the radial direction of the moving shaft, the guide rod being configured to be slidably fixed in the guide hole.

Preferably, the vacuum suction device further comprises a scale extending in a longitudinal direction of the vacuum suction device and indicating the pulling force, wherein the scale is disposed at an end of the moving shaft facing away from the vacuum suction mechanism, or an end of the positioning pin facing away from the vacuum suction mechanism.

Preferably, the support mechanism includes a support plate and a support frame, wherein the support plate is provided with hinge shafts at opposite sides thereof, the support frame is provided with hinge holes for accommodating the hinge shafts, and the hinge holes extend in the axial direction of the tensile force applying mechanism.

Preferably, the vacuum suction mechanism includes a suction cup for suction on the surface of the part, and a hollow shaft for supporting the suction cup and in fluid communication with a suction port of the suction cup, wherein the hollow shaft includes a suction port in fluid communication with an internal passage thereof.

Preferably, the positioning pin is connected to the moving shaft by a first return spring.

Preferably, the vacuum suction apparatus further includes a sensor for detecting a distance between the moving shaft and the positioning pin, and a display mechanism in communication with the sensor, wherein the sensor is mounted on the moving shaft or the positioning pin, and the display mechanism is configured to generate and show a tensile force value of the tensile force based on the distance

The invention has the beneficial effects that:

1. a tester can apply tension from the outer molded surface of the part to be tested to perform a loading test. For the mode of exerting pressure from the inboard, the vacuum suction device of this disclosure makes the tester can avoid receiving the influence of complicated structures such as the inboard stringer of wallboard in the application of force process to protect the whole appearance of wallboard. In addition, the vacuum suction device does not need to arrange a frame structure for installing the power meter on the inner side of the wall plate of the inspection tool, so that the whole inspection tool is simpler and more convenient. And before the wallboard is inspected, the tester does not need to adjust the force application device, thereby improving the measurement efficiency of the wallboard.

2. The motion of locking nut is converted into the motion of locating pin to application spring hooke's law to utilize first reset spring, carve the resultant force of first reset spring's elasticity and other power in the visual department of this device, will act on the pulling force of sucking disc visual.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the invention without any limiting effect on the scope of the invention, and that the various components in the drawings are not drawn to scale.

Fig. 1 is a schematic structural view of a vacuum pumping apparatus of the present invention.

Fig. 2 is an enlarged view of a portion a of the vacuum suction apparatus of fig. 1.

Fig. 3 is an exploded view of the vacuum suction device of fig. 1.

Fig. 4 shows a cross-sectional view of the vacuum suction device in the front view of fig. 1.

Fig. 5 shows a perspective view of the vacuum suction device in the top direction of fig. 1.

Fig. 6 shows a schematic view of the vacuum suction device in a state of use.

Description of the reference numerals:

a vacuum suction device: 100

Wall board: 200

A vacuum adsorption mechanism: 10

A fixing mechanism: 20

A tension applying mechanism: 30

A support mechanism: 40

Sleeve barrel: 50

A second return spring: 60

A flat plate member: 70

Suction cup: 11

A hollow shaft: 12

Internal passage: 13

Air extraction opening: 14

A moving shaft: 21

A shoulder part: 21A

A guide rod: 21B

A guide cylinder: 22

A guide channel: 22A

Positioning pins: 23

Locking the nut: 24

Positioning a hole: 25

A flange part: 26

A fastener: 27

Scale: 28

A first return spring: 29

A support plate: 41

A support frame: 42

Hinge holes: 43

Hinging the shaft: 44

A guide hole: 52

A first end wall: 54

A second end wall: 56

Detailed Description

The inventive concept of the present invention will be described in detail below with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of practicing the invention will occur to those skilled in the art and are within the scope of the invention. In the following detailed description, directional terms, such as "upper", "lower", "inner", "outer", "longitudinal", "transverse", etc., are used with reference to the directions as illustrated in the accompanying drawings. Components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 shows a perspective view of a vacuum suction device 100 according to the present invention. As shown in fig. 1, the vacuum suction apparatus 100 is composed of a vacuum suction mechanism 10, a fixing mechanism 20, a tension applying mechanism 30, and the like. Wherein the vacuum suction mechanism 10 is provided at one end portion of the vacuum suction apparatus 100 along the axial direction X of the vacuum suction apparatus 100 (i.e., the longitudinal direction of the vacuum suction apparatus 100), and is configured to be able to suck the part to be inspected through the suction port. Hereinafter, for convenience of explanation, the parts to be inspected will be schematically described by taking "wall plate" as an example.

Referring to fig. 3-5, fig. 3 is an exploded view of the vacuum pumping arrangement 100, fig. 4 is a cross-sectional view of the vacuum pumping arrangement 100 in the elevational view of fig. 1, and fig. 5 is a perspective view of the vacuum pumping arrangement 100 in the plan view of fig. 1. Referring to fig. 3 to 5, the vacuum suction mechanism 10 has a suction cup 11 for suction on the surface of the wall plate 200, and a hollow shaft 12 for supporting the suction cup 11 and in fluid communication with a suction port of the suction cup 11, wherein the hollow shaft 12 includes a suction port 14 in fluid communication with an inner passage 13 thereof. The suction cup 11 is a conventional member made of a flexible material, and has a small diameter end on one side sealingly fixed to the hollow shaft 12 and a large diameter section (suction port) on the other side for engaging a part to be inspected (i.e., the wall plate 200). Referring to fig. 4, the inner passage 13 of the hollow shaft 12 made of a rigid material is provided with the above-described suction ports 14 at an end portion in an extending direction thereof. A conventional interface for connecting a suction pump may be provided on the suction port 14. When in use, a tester pushes the suction port of the suction cup 11 against the wall plate 200 and then starts the suction pump. The suction pump sucks air from the space formed by the suction cup 11 and the wall plate 200 to form a vacuum environment. The vacuum suction mechanism 10 (vacuum suction apparatus 100) can firmly attract the wall plate 200 by the external air pressure.

According to the present disclosure, the suction cups 11 of the vacuum suction device 100 are set such that the minimum vacuum pressure can be maintained within the interval of 30-80kPa, thereby ensuring that a pulling force of not less than 45N can be exerted on the wall plate 200.

The fixing mechanism 20 of the vacuum suction apparatus 100 is used for fixing the vacuum suction apparatus 100 on the supporting mechanism 40, wherein the supporting mechanism 40 is used for supporting the vacuum suction apparatus 100 and is located outside the part to be detected. The securing mechanism 20 may be any suitable mechanism and device for securing the vacuum suction apparatus 100, for example, it may be a snap-fit mechanism, a threaded fastening mechanism, a clamping mechanism, or the like. The support mechanism 40 is optionally a structure as shown in fig. 1, 3-5, and includes a support plate 41 and a support frame 42, wherein the support plate 41 is mounted on the support frame 42. As an alternative fixing mechanism 20, the fixing mechanism 20 of the present disclosure is composed of the flange portion 26 of the guide cylinder 22, the second end wall 56 of the sleeve 50, and the fastening bolt 27 connecting the flange portion 26 and the second end wall 56. The flange portion 26 of the guide cylinder 22, and the second end wall 56 of the sleeve 50, will be described further below.

With continued reference to fig. 1 to 5, a tensile force applying mechanism 30 is provided at the other end portion of the vacuum suction apparatus 100 in the axial direction X of the vacuum suction apparatus 100, is connected to the vacuum suction mechanism 10, and is configured to be able to adjust the tensile force applied to the wall plate 200 at the outside of the part to be inspected by the vacuum suction mechanism 10.

Referring to fig. 2 to 5, the tensile force applying mechanism 30 is specifically composed of the moving shaft 21, the guide cylinder 22, the positioning pin 23, the sleeve 50, the second return spring 60, the first return spring 29, and the lock member, and the like. As shown in fig. 3 and 4, one end of the moving shaft 21 is fixed to the hollow shaft 12 of the vacuum suction mechanism 10, and both are coaxially disposed. The other end of the moving shaft 21 is connected to a positioning pin 23. When a tester moves the positioning pin 23 to drive the moving shaft 21 to move along a side (the right side in fig. 1-5) away from the vacuum adsorption mechanism 10, the moving shaft 21 synchronously drives the hollow shaft 12 to move right, and the tensile force applied to the part to be detected is increased; similarly, when the moving shaft 21 moves to the left, the pulling force is reduced.

In the embodiment of 3 to 5, the other end of the moving shaft 21 is connected to the positioning pin 23 through the first return spring 29. Specifically, the other end of the moving shaft 21 and the positioning pin 23 are provided with a hanging hole, and both ends of the first return spring 29 pass through the hanging holes to connect the moving shaft 21 and the positioning pin 23. The user can determine the moving distance of the fixing pin 23 according to hooke's law after confirming the tensile load required to be applied to the wall plate 200 and the elastic coefficient of the first return spring 29. With the first return spring 29 set, the tester can accurately adjust the amount of tension applied to the wall plate 200.

In order to lock the position of the positioning pin 23 and ensure a precise adjustment of the tension value, the tension applying mechanism 30 is further provided with a guide cylinder 22 and a corresponding locking member. The guide cylinder 22 can be fixed to the support mechanism 40. Specifically, the outer wall surface of the guide cylinder 22 is provided with a flange portion 26 protruding outward, wherein the flange portion 26 is provided with a through hole through which a fastening member such as a fastening bolt 27 or a fastening screw can fix the guide cylinder 22 (the vacuum suction device 100) to the support plate 41 of the support mechanism 40. The guide cylinder 22 has a guide passage 22A formed therein for guiding the moving shaft 21. The wall surface of the guide passage 22A is provided with positioning holes 25 in the extending direction X of the guide passage 22A as shown in fig. 3, 5. The positioning pin 23 is movable in the extending direction X within the positioning hole 25, and is connectable to the moving shaft 21 through the positioning hole 25.

The positioning holes 25 are preferably provided in pairs at diametrically opposite ends of the guide cylinder 22, and the positioning pins 23 can pass through the two positioning holes 25 at the diametrically opposite ends for ensuring that the positioning pins 23 are not pulled into the interior of the guide passage 22A of the guide cylinder 22 by the elastic action of the first return spring 29 at the position where they are moved to the desired position.

The lock member is configured to maintain the position of the positioning pin 23 in the extending direction. For this locking element, it may be in the form of a locking nut 24 with an internal threaded portion. At this time, the outer wall surface of the guide cylinder 22 is formed with an external thread portion that engages with the internal thread portion of the lock nut 24. The tester can adjust the position of the positioning pin 23 in the extending direction X of the guide cylinder 22 by screwing the lock nut 24, thereby adjusting the tension value.

Alternatively, the locking member may also be a clip. The detent pin 23 is locked to the guide cylinder 22 by a clip when it is moved to the desired position.

A shoulder portion 21A is optionally provided on the moving shaft 21 at an end adjacent to the vacuum suction mechanism 10. In the embodiment shown in fig. 3-5, the shoulder portion 21A is formed as a single plate-like member extending circumferentially around the displacement shaft 21, i.e. the plate-like member extends in a plane perpendicular to the X-direction shown in fig. 1. Alternatively, the shoulder portion 21A may also be formed as a plurality of plate-like members provided at different circumferential positions of the moving shaft 21.

After the shoulder portion 21A is provided on the moving shaft 21, the vacuum suction apparatus 100 can be returned by the second return spring 60 abutting on the shoulder portion 21A. Both ends of the second return spring 60 optionally abut the shoulder portion 21A and the guide cylinder 22, respectively, as shown in fig. 4 and 5. The second return spring 60 is optionally fitted over the moving shaft 21.

Further, the vacuum suction apparatus 100 may be further provided with a sleeve 50 for guiding the shoulder portion 21A of the moving shaft 21. While the moving shaft 21 is moved by the pulling action of the positioning pin 23, the shoulder portion 21A slides along the inner wall surface of the sleeve 50. Under the guiding action of the sleeve 50, the moving shaft 21 will not deflect during the moving process, so that the vacuum suction mechanism 10 will be disturbed and separated from the wall plate 200. It will be appreciated that in order to ensure that the displacement shaft 21 does not deflect during displacement, it is also possible to achieve a longer abutment distance between the displacement shaft 21 and the guide cylinder 22 in the direction of extension X of the guide cylinder 22. For example, the length of the moving shaft 21 within the guide passage 22A of the guide cylinder 22 is set to not less than 50%, 60%, etc. of the total length thereof at any time between the initial time when the vacuum suction apparatus 100 does not apply the pulling force and the final time when the vacuum suction apparatus 100 applies the maximum pulling force.

The sleeve 50 has a first end wall 54 and a second end wall 56 at two axial ends, wherein the first end wall 54 is disposed on the vacuum absorbing mechanism 10, and the second end wall 56 is disposed on the guide cylinder 22. The second end wall 56 may be provided with a plurality of through holes that align with the through holes in the guide cylinder 22. Fasteners (fastening bolts) 27 can be inserted through the through holes of the flange portion 26 and the second end wall 56, respectively, to fix the vacuum suction apparatus 100 to the support mechanism 40. It will be appreciated that the second end wall 56, the flange portion 26 and the fasteners (fastening bolts) 27 are now formed as a fixing mechanism 20 for fixing the vacuum suction apparatus 100, the fixing mechanism 20 being clamped to the support plate 41 of the support mechanism 40.

In the case where the sleeve 50 is provided, since the sleeve 50 is a non-movable member fixed to the support mechanism 40, both ends of the second return spring 60 are also disposed alternately so as to abut on the shoulder portion 21A and the second end wall 56, respectively. In addition, a plurality of second return springs 60 may be provided. A plurality of return springs may be evenly disposed within the space S defined by the shoulder portion 21A of the moving shaft 21 and the second end wall 56 of the sleeve 50. It should be understood that the second return spring 60 can also be sleeved on the moving shaft 21 and set in the space S defined by the shoulder portion 21A of the moving shaft 21 and the second end wall 56 of the sleeve 50.

In the above description, the moving shaft 21 can be prevented from being deflected in the longitudinal direction X of the vacuum suction apparatus 100 by the guiding action of the guide cylinder 22 and/or the sleeve 50. As a preferred embodiment of the present disclosure, the vacuum suction apparatus 100 is also provided with a mechanism for ensuring that the moving shaft 21 does not rotate in the transverse direction Y of the vacuum suction apparatus 100. The mechanism includes a guide hole 52 provided in the sleeve 50 and a guide rod 21B provided on a shoulder portion 21A of the moving shaft 21. Wherein the guide hole 52 extends in the extension direction of the sleeve 50. The guide rod 21B protrudes outward in the radial direction of the moving shaft 21. Referring to fig. 5, guide rod 21B may be a screw threadably engaged at shoulder 21A.

Preferably, the guide holes 52 may be provided in plurality, for example, in an embodiment in which the sleeve 50 is provided to have a circular cross section, the guide holes 52 are provided at diametrically opposite ends of the sleeve 50. The guide holes 52 may be provided at different circumferential positions on the wall surface of the sleeve 50, provided that the non-rotation of the moving shaft 21 is achieved. Correspondingly, the guide rod 21B may be provided in plurality accordingly.

Referring to fig. 3-5, the vacuum 100 may optionally be provided with a plate member 70, which may be disposed between the second end wall 56 and the flange portion 26. After the fastener 27 has passed through the second end wall 56, the plate member 70, and the flange portion 26, the clamping force applied by the fastener 27 can be transmitted dispersedly to the sleeve 50 through the plate member 70, and the sleeve 50 can thus avoid stress concentration.

Referring to fig. 1-2, to facilitate the experimenter's identification of the amount of tension applied to the wall plate 200, the vacuum extractor 100 is further provided with a gauge 28 extending longitudinally therealong for indicating the tension, in accordance with the present disclosure. Wherein the scale 28 is arranged at an end of the moving shaft 21 facing away from the vacuum suction mechanism 10, or at an end of the positioning pin 23 facing away from the vacuum suction mechanism 10. Specifically, the scale 28 has a surface provided with a scale, and protrudes from the opening of the guide cylinder 22. During the process of adjusting the pulling force by the tester rotating the locking nut 24, the scale 28 will move synchronously with the moving shaft 21 or the positioning pin 23, so that different scales are aligned with the end face of the sleeve 50. By reading the scale on the scale 28, the tester can know the pulling force exerted by the vacuum 100 on the wall plate 200.

It can be understood that the scales on the scale 28 are positively correlated with the elastic coefficients of the first return spring 29 and the second return spring 60. The designer can set the scale in a calculation mode or set the scale in an experiment mode. In the present disclosure, the elastic coefficient of the second return spring 60 may be set to be much smaller than that of the first return spring 29. For example, the spring constant of the second return spring 60 is set to 0.98N/mm, and the spring constant of the first return spring 29 is set to 5.58N/mm. In this case, when the load test is performed, the dimension of deformation of the second return spring 60 is small, and accordingly, the moving distance of the moving shaft 21 is relatively small, so that the vacuum suction apparatus is always tightly attached to the wall plate 200.

Referring to fig. 1 and 3, in order to expand the applicable range of the vacuum suction apparatus 100 according to the present disclosure, hinge shafts 44 in the form of screws or bolts are provided at opposite sides of the support plate 41 in the support mechanism 40 of the present disclosure, and hinge holes 43 for receiving the hinge shafts 44 are provided on the support frame 42. Each hinge hole 43 extends in the axial direction of the tension applying mechanism 30. After the support frame 42 is fixed in place, the tester can rotate the vacuum suction device 100 around the hinge hole 43 according to the position and shape of the wall plate 200, and lock the vacuum suction device after the vacuum suction device is translated in place. A tensile load is then applied to the wall plate 200 by moving the dowel pins 23.

The test procedure is schematically illustrated below by an embodiment in which a tensile load of not more than 45N is applied to the panel 200. The support bracket 42 is first mounted on the side of the inspection card of the inspection tool shown in fig. 6, and the vacuum suction device 100 is sucked to a predetermined position of the wall plate 200 by the vacuum suction mechanism 10. Then, the lock nut 24 is rotated to move the positioning pin 23 attached to the positioning hole 25 of the guide cylinder 22 to the left. At this time, the first return spring 29 is extended to move the moving shaft 21 to the right. In the case where the moving distance of the second return spring 60 is small, the influence of the amount of deformation of the second return spring 60 on the moving distance of the positioning pin 23 can be ignored. According to the spring hooke's law F ═ ks, the first spring initial tension is 20N, and k is 5.58N/m, so that the movement distance s of the positioning pin 23 is calculated to be approximately 4.5 mm. A scale value of 45N is marked at the initial position of the scale 28, which is 4.5mm outwards, and a 45N pulling force can be applied to the wall plate 200 by pulling the positioning pin 23 to the position of the scale value of 45N. Because the rigidity of the end wall plate 200 of the sucker 11 is unknown, if the sucker 11 is not moved, the pulling force of the sucker 11 on the horizontal tail wall plate 200 is 45N; assuming that the suction cup 11 moves a small distance to the right, the tension of the suction cup 11 on the wall plate 200 will be slightly less than 45N due to the small value of the compression spring k, and both conditions are satisfied when the tension is not greater than 45N.

In addition to acquiring the applied tensile force by reading the form of the scale 28 described above, the tensile force value of the vacuum suction apparatus 100 according to the present disclosure can also be measured by detecting a relative displacement change between the positioning pin 23 and the moving shaft 21. Specifically, the vacuum suction apparatus 100 may include a sensor for measuring a distance between the positioning pin 23 and the moving shaft 21, the sensor being connected in communication with a display mechanism for displaying a tensile force value. As analyzed above, since the distance between the positioning pin 23 and the moving shaft 21 is positively correlated with the tensile force value, when the distance is changed, the force value on the display mechanism is also changed. This way, the situation of error in reading the tension value can be avoided.

Optionally, the vacuum pumping arrangement 100 is further provided with an alarm in communicative connection with the above-mentioned sensor. When the applied pulling force reaches a preset value, such as 45N, the alarm gives an alarm, so that the experimenter can be reminded to avoid applying excessive pulling force.

As is apparent from the above description, the vacuum suction apparatus 100 of the present disclosure changes the conventional mode of performing a load test by applying a pressure, and performs a load test by applying a tensile force to the wall plate 200. The vacuum suction apparatus 100 is installed outside the wall plate 200, and thus, a tester does not need to install a frame inside the wall plate 200, which needs to avoid various interference structures and facilitates a tensile machine to apply a pressure load. After the vacuum suction apparatus 100 is sucked to the part to be inspected (the wall plate 200) by the vacuum suction mechanism 10 and fixed to the supporting mechanism 40 by the fixing mechanism 20, the tester can adjust the tensile force applied to the part to be inspected by pulling the tensile force applying mechanism 30.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and any modifications, equivalents, 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 vacuum suction device (100), characterized in that the vacuum suction device (100) comprises:

a vacuum suction mechanism (10), the vacuum suction mechanism (10) being provided at one end portion of the vacuum suction device (100) along an axial direction of the vacuum suction device (100), and being configured to be capable of sucking a part to be inspected through a suction port;

a fixing mechanism (20), wherein the fixing mechanism (20) is configured to be capable of fixing the vacuum suction device (100) on a supporting mechanism (40), the supporting mechanism (40) is used for supporting the vacuum suction device (100) and is positioned outside the part to be detected; and

a tensile force applying mechanism (30), the tensile force applying mechanism (30) being provided at the other end portion of the vacuum suction apparatus (100) in the axial direction of the vacuum suction apparatus (100), being connected to the vacuum suction mechanism (10), and being configured to be able to adjust a tensile force applied to the part to be inspected outside the part to be inspected by the vacuum suction mechanism (10).

2. The vacuum suction device (100) according to claim 1, wherein the pulling force applying mechanism (30) comprises:

the moving shaft (21), the moving shaft (21) is connected with the vacuum adsorption mechanism (10), and when the moving shaft (21) moves along one side departing from the vacuum adsorption mechanism (10), the pulling force applied to the part to be detected can be adjusted;

a guide cylinder (22), wherein the guide cylinder (22) can be fixed on the support mechanism (40), a guide channel (22A) for guiding the moving shaft (21) is formed inside the guide cylinder, and a positioning hole (25) along the extension direction of the guide channel (22A) is formed on the wall surface of the guide channel (22A);

a positioning pin (23), the positioning pin (23) being configured to be movable in the extending direction within a positioning hole (25), and to be connectable with the moving shaft (21) through the positioning hole (25); and

a lock configured to maintain a position of the positioning pin (23) in the extending direction.

3. The vacuum suction apparatus (100) according to claim 2, wherein an outer wall surface of the guide cylinder (22) is formed with an external thread portion, and the locking member is a locking nut (24) having an internal thread portion engaged with the external thread portion.

4. The vacuum suction device (100) according to claim 3, wherein the positioning holes (25) are provided in pairs at diametrically opposite ends of the guide cylinder (22), the positioning pins (23) being capable of passing through two positioning holes (25) at diametrically opposite ends.

5. The vacuum suction device (100) according to any one of claims 2 to 4, wherein the moving shaft (21) is provided with a shoulder portion (21A) at an end adjacent to the vacuum suction mechanism (10), the shoulder portion (21A) being formed as a single plate-like member extending circumferentially around the moving shaft (21) or a plurality of plate-like members provided at different circumferential positions of the moving shaft (21).

6. The vacuum suction device (100) according to claim 5, wherein the vacuum suction device (100) further comprises a second return spring (60), both ends of the second return spring (60) abutting the shoulder portion (21A) and the guide cylinder (22), respectively.

7. The vacuum suction device (100) according to claim 5, wherein the vacuum suction device (100) further comprises a sleeve (50) for guiding the shoulder portion (21A), the sleeve (50) having a first end wall (54) and a second end wall (56) at both axial ends thereof, wherein the first end wall (54) is sleeved on the vacuum suction mechanism (10), and the second end wall (56) is slidably sleeved on the guide cylinder (22).

8. The vacuum pumping arrangement (100) according to claim 7, characterized in that the vacuum pumping arrangement (100) further comprises a second return spring (60), both ends of the second return spring (60) abutting on the shoulder portion (21A) and the second end wall (56), respectively.

9. The vacuum pumping apparatus (100) of claim 8, wherein the second return spring (60) is sleeved on the moving shaft (21).

10. The vacuum suction device (100) according to any one of claims 7 to 9, wherein the outer wall surface of the guide cylinder (22) protrudes outwards to form a flange portion (26), wherein the flange portion (26) and the second end wall (56) are axially opposite and provided with corresponding through holes, and wherein fasteners can be passed through the through holes of the flange portion (26) and the second end wall (56) to fix the vacuum suction device (100) to the support means (40).

11. The vacuum pumping arrangement (100) of claim 10, wherein the vacuum pumping arrangement (100) further comprises a plate member (70) capable of being clamped between the second end wall (56) and the flange portion (26).

12. The vacuum pumping apparatus (100) according to claim 7, wherein the wall surface of the sleeve (50) is provided with a guide hole (52) extending in the extending direction of the sleeve (50), the shoulder portion (21A) is provided with a guide rod (21B) protruding outward in the radial direction of the moving shaft (21), and the guide rod (21B) is configured to be slidably fixed in the guide hole (52).

13. The vacuum suction device (100) according to claim 3 or 4, characterized in that the vacuum suction device (100) further comprises a scale (28) extending in a longitudinal direction of the vacuum suction device (100) and indicating the pulling force, wherein the scale (28) is arranged at an end of the moving shaft (21) facing away from the vacuum suction mechanism (10) or at an end of the positioning pin (23) facing away from the vacuum suction mechanism (10).

14. The vacuum pumping device (100) according to claim 1, wherein the supporting mechanism (40) comprises a supporting plate (41) and a supporting frame (42), wherein an articulated shaft (44) is provided on the opposite side of the supporting plate (41), an articulated hole (43) for accommodating the articulated shaft (44) is provided on the supporting frame (42), and the articulated hole (43) extends in the axial direction of the tensile force applying mechanism (30).

15. The vacuum suction device (100) according to claim 1, wherein the vacuum suction mechanism (10) comprises a suction cup for suction on the surface of the part, and a hollow shaft (12) for supporting the suction cup and in fluid communication with a suction opening of the suction cup, wherein the hollow shaft (12) comprises a suction opening (14) in fluid communication with an internal passage (13) thereof.

16. The vacuum suction device (100) according to any one of claims 2 to 4, wherein the positioning pin (23) is connected to the moving shaft (21) by a first return spring (29).

17. The vacuum suction device (100) according to claim 16, further comprising a sensor for detecting a spacing between the moving shaft (21) and the positioning pin (23), wherein the sensor is mounted on the moving shaft (21) or the positioning pin (23), and a display mechanism in communication with the sensor, wherein the display mechanism is configured to be able to generate and show the tension value of the tension force based on the spacing.