CN111879471A - Lever up-pressing type plugging tool for airtightness detection - Google Patents
Lever up-pressing type plugging tool for airtightness detection Download PDFInfo
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- CN111879471A CN111879471A CN202011036398.6A CN202011036398A CN111879471A CN 111879471 A CN111879471 A CN 111879471A CN 202011036398 A CN202011036398 A CN 202011036398A CN 111879471 A CN111879471 A CN 111879471A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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Abstract
The invention provides a lever up-pressing type plugging tool for air tightness detection, which comprises a tool frame, a feeding and discharging mechanism, a tool floating mechanism and two sets of plugging tools, wherein the feeding and discharging mechanism is arranged on the tool frame; each set of plugging jig comprises an upper jig and a lower jig; each set of plugging jig is correspondingly matched with one set of plugging lever mechanism, each set of plugging lever mechanism comprises a plugging air cylinder and a pressing rod, the plugging air cylinder and the upper jig corresponding to the plugging jig are fixed on the upper part of the jig frame side by side, the middle part of the pressing rod is hinged with the pressing rod support, the end parts of the two ends of the pressing rod are respectively positioned right below the plugging air cylinder and the corresponding upper jig, and an air cylinder piston rod of the plugging air cylinder can abut against the corresponding end part of the pressing rod below through an abutting head fixedly connected with the head part of the plugging; the end part of the pressure lever, which is positioned right below the upper jig, is rotatably connected with a first bearing which is used for being abutted against the corresponding part of the floating mechanism of the jig. On the premise of ensuring the plugging capability, the invention effectively reduces the whole volume of the tool, prolongs the service life and reduces the cost.
Description
Technical Field
The invention belongs to the technical field of airtightness detection, and particularly relates to a lever up-pressing type plugging tool for airtightness detection.
Background
The plugging tool for differential pressure type airtightness detection is generally provided with two sets of plugging tools, each set of plugging tool comprises an upper tool and a lower tool, one set of plugging tool is used for plugging a detected object, and the other set of plugging tool is used for plugging a benchmark object. In the prior art, a downward pressing type is generally adopted, namely a jig is directly and fixedly connected to the end part of a piston rod of a plugging air cylinder, and after the lower jig is moved to the position under the plugging air cylinder, the piston rod of the air cylinder is pressed down to drive the upper jig to be pressed on the lower jig, so that plugging is realized. According to the downward-pressing type plugging tool, the upper jig is directly and fixedly connected with the piston rod of the air cylinder, so that the whole height of the mechanism is large, the plugging air cylinder needs to be selected according to the largest product plugging area in order to meet the detection requirements of objects to be detected of different types and different specifications and shapes, the plugging of the mode needs the large cylinder diameter of the air cylinder, and the whole volume of the mechanism cannot be reduced; in addition, the feeding and discharging mechanism bearing the lower jig can also be subjected to larger pressing pressure during plugging, so that the mechanism is easily damaged, and the service life is influenced.
Disclosure of Invention
In view of this, the present invention provides a lever up-pressure type plugging tool for air tightness detection, which specifically comprises:
the device comprises a tool frame, a feeding and discharging mechanism, a jig floating mechanism and two sets of plugging jigs; each set of plugging jig comprises an upper jig and a lower jig;
each set of plugging jig is correspondingly matched with one set of plugging lever mechanism, each set of plugging lever mechanism comprises a plugging air cylinder and a pressure rod, the plugging air cylinder and an upper jig corresponding to the plugging jig are fixed on the upper part of the tool frame side by side, the middle part of the pressure rod is hinged with a pressure rod support fixed on the lower part of the tool frame, the end parts of two ends of the pressure rod are respectively positioned under the plugging air cylinder and the corresponding upper jig, and an air cylinder piston rod of the plugging air cylinder can abut against the corresponding end part of the pressure rod below through an abutting head fixedly connected with the head part; the end part of the pressure lever, which is positioned right below the upper jig, is rotatably connected with a first bearing which is used for abutting against the corresponding part of the floating mechanism of the jig;
the feeding and discharging mechanism is responsible for simultaneously driving the two lower jigs to slide in or out of the area between the two upper jigs and the end part of the pressure bar below the two upper jigs;
the jig floating mechanism is responsible for enabling two lower jigs which are installed on the jig floating mechanism side by side to horizontally slide under the driving of the feeding and discharging mechanism, and enables the lower jigs to provide vertical sliding guide when the lower jigs move upwards or downwards under the driving of the pressing rod end under the lower jig.
The length of the pressure rod from the support of the pressure rod towards the direction of the plugging air cylinder is greater than that of the pressure rod towards the direction of the upper jig.
The compression bar is arranged between the lower surface of the rod body and the tool bottom plate from the end part below the plugging cylinder to the position between the compression bar supports, and a spring is further arranged between the lower surface of the rod body and the tool bottom plate, so that the compression bar can reset after the piston rod of the cylinder retracts.
The top includes head and body of rod portion, and body of rod portion is equipped with the external screw thread section, and the external screw thread section through the body of rod portion is connected with the screw hole of cylinder piston rod and is made the top rigid coupling in the head of cylinder piston rod.
The rod body part between the head part of the piston rod of the air cylinder and the head part of the ejector is also sleeved with an adjusting ring, and the stroke of the plugging position is adjusted by replacing the adjusting rings with different lengths.
The top end of the head of the ejector is spherical, a top pin is correspondingly screwed and fixed on the end part of the lower pressure rod, and the top end surface of the top pin is a plane, so that the piston rod of the cylinder and the top end of the pressure rod are kept in point contact at any time.
The feeding and discharging mechanism comprises a rodless cylinder positioned in the middle and linear guide rails positioned on two sides, and each set of blocking lever mechanism is respectively positioned in the area between the linear guide rail on the corresponding side and the rodless cylinder;
the jig floating mechanism comprises an in-out sliding plate, two middle plates and two lower jig connecting plates which are sequentially arranged from bottom to top, each lower jig is fixedly connected onto the corresponding lower jig connecting plate, and the lower surfaces of the two ends of the in-out sliding plate are fixedly connected onto the sliding blocks of the linear guide rails on the corresponding side;
the lower surface of the middle part of the in-out sliding plate is connected with a sliding block of the rodless cylinder, so that the feeding and discharging mechanism drives the jig floating mechanism to horizontally slide;
each lower jig connecting plate and the corresponding lower matched middle plate can relatively slide along the guide direction through the elastic guide assembly, and the gap distance is kept through elasticity without external force influence;
the middle plate is connected with the corresponding side part of the in-out sliding plate in a sliding and guiding way;
the middle part of the middle plate is provided with a ball head through hole, the ball head through hole is provided with a middle plate ball head through the surface contact of an annular cambered surface or the line contact bearing of an annular line, the middle plate ball head protrudes out of one part of the upper surface of the middle plate, the lower surface of the lower jig connecting plate is correspondingly provided with a spherical groove, and the part of the middle plate ball head protruding out of the upper surface of the middle plate can realize point contact with the spherical groove; the first bearing of the pressure lever can realize the butt joint with the lower surface of the middle plate ball head through the ball head through hole below the middle plate ball head.
The two sides of the in-out sliding plate are provided with avoidance grooves corresponding to the ends of the pressing rods, so that the end of the pressing rod or a first bearing of the end can penetrate through the avoidance grooves to be directly abutted against the lower surface of the middle plate ball head of the middle plate.
A traction bulge is fixedly arranged on a sliding block of the rodless cylinder, a traction groove is correspondingly formed in the lower surface of the middle part of the in-out sliding plate, and the traction bulge is embedded into the traction groove to realize the connection of the sliding block and the in-out sliding plate.
The elastic guide assembly comprises a bolt and a spring, the bolt rod body penetrates through the lower jig connecting plate and is connected with the lower jig connecting plate in a sliding guide mode, the head of the bolt rod body is fixedly connected with the middle plate in a threaded mode, the spring is sleeved on the rod body, two ends of the spring respectively abut against the lower jig connecting plate and the middle plate, and the bolt head can limit stop of the lower jig connecting plate.
On the premise of ensuring the plugging capability, the invention effectively reduces the whole volume of the tool, lightens the weight, prolongs the service life and reduces the cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a plugging tool for downward pressure type airtightness detection in the prior art;
FIG. 2 is a schematic view of the overall structure of the lever up-pressure type plugging tool for airtight detection of the present invention;
FIG. 3 is a schematic view of a tooling frame and a loading and unloading in-and-out mechanism;
FIG. 4 is a schematic view of a jig floating mechanism;
FIG. 5 is a schematic top view of the lower fixture;
FIG. 6 is a schematic view of an occlusion lever mechanism;
fig. 7 is a schematic cross-sectional view of the occlusion lever mechanism.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Fig. 1 is a schematic diagram of a plugging tool for downward-pressing type air tightness detection in the prior art, in the diagram, a plugging cylinder 1 on the right side, an upper jig 2 and a lower jig 4 are used for plugging a corresponding measured object 3, and a plugging cylinder 5 on the left side, an upper jig 6 and a lower jig 8 are used for plugging a corresponding reference object 7, as can be seen from the figure, the downward-pressing type plugging tool has a larger overall height due to the fact that the upper jig is directly and fixedly connected with a cylinder piston rod of the plugging cylinder; in addition, the feeding and discharging mechanism bearing the lower jig can also bear large pressing pressure during plugging, and the mechanism is easy to damage.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 2 to 7, the lever up-pressure type plugging tool for air tightness detection of the present invention includes a tool frame, a loading and unloading in-and-out mechanism, a tool floating mechanism, two sets of plugging tools, and two sets of plugging lever mechanisms.
The tool framework mainly comprises a tool bottom plate 13 positioned at the lower end of the tool, a tool top plate 9 positioned at the upper end of the tool and a plurality of positioning upright posts 10 fixedly connected with the tool bottom plate and the tool top plate.
Each set of plugging jig comprises an upper jig, a lower jig, a product filler 24 matched with the reference object, a product filler 25 matched with the measured object and a sealing rubber ring 36, and when the product is subjected to model changing, the product can be completed only by changing the product filler; a, B in fig. 3 are air holes, and the upper jig 6 corresponding to the reference object and the upper jig 2 corresponding to the measured object are respectively connected with the differential pressure leak detector through pipelines.
One set of plugging jig is correspondingly matched with one set of plugging lever mechanism, and each set of plugging lever mechanism comprises a plugging air cylinder 26, an adjusting ring 27, a top 28, a butting pin 29, a pressure lever 30, a pressure lever support 32, a pressure lever hinge pin 34, a bearing hinge pin 33, a first bearing 35 and a spring 31. The plugging cylinder 26 and the upper jig of the correspondingly matched plugging jig are fixed on the tool top plate 9, the middle part of the pressure rod 30 is hinged with a pressure rod support 32 through a pressure rod hinge pin 34, the end parts of the two ends of the pressure rod are respectively positioned under the plugging cylinder and the corresponding upper jig, the length of the pressure rod from the pressure rod support 32 to the plugging cylinder direction is greater than that of the pressure rod to the upper jig direction, a cylinder piston rod of the plugging cylinder 26 is vertically arranged downwards and can abut against the corresponding end part of the pressure rod below through a top head 28 fixedly connected with the head part of the cylinder piston rod, and a spring 31 is further arranged between the lower surface of the rod body between the end part and the pressure rod support 32 and the tool bottom plate 13, so that the pressure rod can reset after the cylinder piston;
preferably, the plug 28 comprises a head part and a rod body part, the rod body part is provided with an external thread section, and the plug 28 is fixedly connected with the head part of the cylinder piston rod through the connection of the external thread section of the rod body part and the threaded hole of the cylinder piston rod;
in addition, the rod body part between the head part of the piston rod of the cylinder and the head part of the top 28 can be sleeved with an adjusting ring 27, and the stroke of the plugging position can be adjusted by replacing the adjusting rings 27 with different lengths;
furthermore, the top end of the head of the top 28 is spherical, the end of the lower pressure rod is correspondingly screwed and fixed with a top pin 29, and the top end surface of the top pin 29 is a plane, so that the cylinder piston rod and the pressure rod are kept in point contact at the top contact moment, and the cylinder piston rod and the pressure rod are not damaged hard due to the change of the pitch angle of the pressure rod.
The feeding and discharging mechanism is responsible for simultaneously driving the two lower jigs to slide in or out of the area between the two upper jigs and the end part of the pressure bar below the two upper jigs; in this embodiment, the feeding and discharging mechanism comprises a rodless cylinder 14 in the middle and linear guide rails 15 on two sides, each set of blocking lever mechanism is respectively located in the area between the linear guide rail on the corresponding side and the rodless cylinder 14, and the rodless cylinder 14 and the linear guide rails 15 are both fixed on the tooling bottom plate 13;
in order to ensure enough height, a cylinder cushion block 11 is fixedly connected to a sliding block of the rodless cylinder 14, a guide rail cushion block 12 is fixedly connected to a sliding block of the linear guide rail 15, and the cylinder cushion block 11 and the guide rail cushion block 12 can be respectively used as a part of the corresponding sliding block;
the jig floating mechanism is responsible for enabling two lower jigs which are arranged on the jig floating mechanism side by side to horizontally slide under the driving of the feeding and discharging mechanism and enabling the lower jigs to provide vertical sliding guide when being driven by the pressure rod end right below to do ascending or descending movement;
preferably, the end part of the pressure lever, which is positioned right below the upper jig, is rotatably connected with the first bearing 35 through the bearing hinge pin 33, so that the contact between the pressure lever and the corresponding part of the floating mechanism of the jig is always kept in line contact or point contact, the damage caused by the assembly error of the floating mechanism of the jig is avoided, and the plugging of the upper jig and the lower jig is tighter; whether the jig is in line contact or point contact is determined by whether the corresponding part of the floating mechanism of the jig is a plane or a curved surface.
In this embodiment, the jig floating mechanism includes an in-out sliding plate 21, two middle plates 20 and two lower jig connecting plates 19, which are sequentially arranged from bottom to top, each lower jig is fixedly connected to the corresponding lower jig connecting plate 19, and the lower surfaces of the two ends of the in-out sliding plate 21 are fixedly connected to the sliding blocks of the linear guide rails 15 on the corresponding side, and are mainly responsible for bearing the weight of the whole jig floating mechanism;
the lower surface of the middle part of the in-out sliding plate 21 is connected with a sliding block of the rodless cylinder 14, so that the feeding and discharging mechanism drives the jig floating mechanism to horizontally slide; preferably, in order to eliminate assembly tolerance, a traction protrusion 110 is fixedly arranged on the sliding block of the rodless cylinder 14, a traction groove is correspondingly formed in the lower surface of the middle part of the in-out sliding plate 21, the traction protrusion 110 is embedded into the traction groove to realize the connection between the sliding block and the in-out sliding plate 21, and certain clearance fit for eliminating tolerance can be provided;
each lower jig connecting plate 19 is connected with the corresponding lower matched middle plate 20 through two groups of diagonally arranged or four groups of elastic guide assemblies 16 arranged at four corners, so that the lower jig connecting plate and the middle plates can relatively slide along the guide direction and can keep the gap distance through elasticity without external force influence; specifically, in this embodiment, the elastic guide assembly 16 includes a bolt and a spring, the bolt rod passes through the lower jig connecting plate 19 and is connected to the lower jig connecting plate in a sliding guide manner, the head of the bolt rod is fixedly connected to the middle plate 20 by a thread, the spring is sleeved on the rod, two ends of the bolt rod respectively abut against the lower jig connecting plate 19 and the middle plate, and the bolt head can be used as a stop limit to prevent the bolt rod from being separated from the lower jig connecting plate 19;
in addition, a ball head through hole is formed in the middle of the middle plate 20, the ball head through hole is supported and provided with a middle plate ball head 17 through surface contact of an annular cambered surface or line contact of an annular line, a part of the middle plate ball head 17 protrudes out of the upper surface of the middle plate 20, a spherical groove is correspondingly formed in the lower surface of the lower jig connecting plate 19, and point contact can be achieved between the part of the middle plate ball head 17 protruding out of the upper surface of the middle plate 20 and the spherical groove, so that sealing and plugging of the upper and lower jigs above can be achieved better through point contact; the first bearing 35 of the pressure lever can be abutted with the lower surface of the middle plate ball head 17 through a ball head through hole below the middle plate ball head 17;
the sliding guide connection between the two plates is realized by the combination of two groups of bearings 22 and guide shafts 23 at two opposite angles or four groups of four corners between the middle plate 20 and the corresponding side part of the in-out sliding plate 21; the bearing 22 is fixed on the in-out sliding plate 21 in a penetrating way, and one end of the guide shaft 23 is fixedly connected with the middle plate 20 and inserted into the bearing 22.
The surface or line contact of intermediate plate bulb, bulb through-hole, the point contact of intermediate plate bulb and spherical groove, the point contact of intermediate plate bulb and first bearing to and the combination of first bearing with the elastic guide subassembly in addition, both can realize effectual load transmission, also can optimize upper and lower tool laminating effect, effectively eliminate assembly or part manufacturing tolerance, avoid hardware damage, guarantee sealed stable effect.
Preferably, referring to fig. 4, the avoidance grooves 37 are formed at the two side portions of the in-out sliding plate corresponding to the end portions of the pressing rods, so that the end of the pressing rod or the first bearing 35 at the end can directly abut against the lower surface of the middle plate ball 17 of the middle plate through the avoidance groove 37, and the overall volume can be effectively reduced.
The detection steps by the plugging mechanism are roughly as follows:
the method comprises the following steps: wrapping the measured object with filler and placing the wrapped object into a lower jig;
step two: after the equipment is started, the rodless cylinder 14 drives the lower jig 18 to move to a detection position;
step three: the plugging cylinder 26 is ejected downwards, so that the pressure rod 30 rotates around the pressure rod hinge pin 34, the first bearing 35 is driven to swing and rise, the first bearing 35 is abutted to the middle plate ball head 17, the upper jig and the lower jig are attached along with the continuous ejection of the plugging cylinder 26, and a sealing cavity is formed under the action of the rubber ring;
step four: starting a leak detection instrument to carry out air tightness detection on the detected object;
step five: after detection is finished, the plugging air cylinder 26 retracts, and the pressure rod 30 returns under the action of the spring 31, so that the first bearing 35 is separated from the contact with the middle plate ball head 17;
step six: and the feeding and discharging mechanism resets to return the lower jig to the initial position, and the measured object is taken out.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The lever up-pressing type plugging tool for air tightness detection is characterized by comprising a tool frame, a feeding and discharging mechanism, a tool floating mechanism and two sets of plugging tools; each set of plugging jig comprises an upper jig and a lower jig;
each set of plugging jig is correspondingly matched with one set of plugging lever mechanism, each set of plugging lever mechanism comprises a plugging air cylinder and a pressure rod, the plugging air cylinder and an upper jig corresponding to the plugging jig are fixed on the upper part of the tool frame side by side, the middle part of the pressure rod is hinged with a pressure rod support fixed on the lower part of the tool frame, the end parts of two ends of the pressure rod are respectively positioned under the plugging air cylinder and the corresponding upper jig, and an air cylinder piston rod of the plugging air cylinder can abut against the corresponding end part of the pressure rod below through an abutting head fixedly connected with the head part; the end part of the pressure lever, which is positioned right below the upper jig, is rotatably connected with a first bearing which is used for being abutted against the corresponding part of the floating mechanism of the jig.
2. The lever up-pressure type air-tightness detection plugging tool according to claim 1, wherein the length of the pressure rod from the support of the pressure rod to the plugging cylinder direction is greater than the length of the pressure rod to the upper jig direction.
3. The lever up-pressure type plugging tool for detecting airtightness of claim 1, wherein a spring is further disposed between the lower surface of the rod body and the tool bottom plate between the end portion of the pressure rod below the plugging cylinder and the pressure rod support.
4. The lever up-pressure type plugging tool for airtightness detection according to claim 1, wherein the plug includes a head portion and a rod body portion, the rod body portion is provided with an external thread section, and the plug is fixedly connected to the head portion of the cylinder piston rod by connecting the external thread section of the rod body portion with a threaded hole of the cylinder piston rod.
5. The lever up-pressure type plugging tool for airtightness detection according to claim 4, wherein an adjusting ring is further sleeved on the rod body portion between the head portion of the piston rod of the cylinder and the head portion of the plug.
6. The lever up-pressure type air-tightness detection plugging tool according to claim 1 or 4, wherein the top end of the head of the plug is spherical, a top abutting pin is correspondingly screwed and fixed on the end portion of the lower pressure lever, and the top end surface of the top abutting pin is a plane.
7. The lever up-pressure type plugging tool for airtight detection according to claim 1, wherein the feeding and discharging mechanism comprises a rodless cylinder located in the middle and linear guide rails located at two sides, and each set of plugging lever mechanism is located in a region between the linear guide rail at the corresponding side and the rodless cylinder;
the jig floating mechanism comprises an in-out sliding plate, two middle plates and two lower jig connecting plates which are sequentially arranged from bottom to top, each lower jig is fixedly connected onto the corresponding lower jig connecting plate, and the lower surfaces of the two ends of the in-out sliding plate are fixedly connected onto the sliding blocks of the linear guide rails on the corresponding side;
the lower surface of the middle part of the in-out sliding plate is connected with a sliding block of the rodless cylinder, so that the feeding and discharging mechanism drives the jig floating mechanism to horizontally slide;
each lower jig connecting plate and the corresponding lower matched middle plate can relatively slide along the guide direction through the elastic guide assembly, and the gap distance is kept through elasticity without external force influence;
the middle plate is connected with the corresponding side part of the in-out sliding plate in a sliding and guiding way;
the middle part of the middle plate is provided with a ball head through hole, the ball head through hole is provided with a middle plate ball head through the surface contact of an annular cambered surface or the line contact bearing of an annular line, the part of the middle plate ball head which protrudes out of the upper surface of the middle plate is correspondingly provided with a spherical groove, and the part of the middle plate ball head which protrudes out of the upper surface of the middle plate is in point contact with the spherical groove; the first bearing of the pressure lever is abutted with the lower surface of the middle plate ball head after passing through the ball head through hole below the middle plate ball head.
8. The lever up-pressure type plugging tool for airtightness detection according to claim 7, wherein avoidance grooves are provided at two side portions of the in-and-out sliding plate corresponding to the end portions of the corresponding pressure rods.
9. The plugging tool for the lever up-pressure airtight detection according to claim 7, wherein a traction protrusion is fixedly arranged on the sliding block of the rodless cylinder, a traction groove is correspondingly arranged on the lower surface of the middle part of the in-out sliding plate, and the traction protrusion is embedded into the traction groove to realize the connection between the sliding block and the in-out sliding plate.
10. The plugging tool for the upward-pressing type airtight detection of the lever according to claim 7, wherein the elastic guide component comprises a bolt and a spring, the bolt rod body passes through the lower jig connecting plate and is connected with the lower jig connecting plate in a sliding and guiding manner, the head of the bolt rod body is fixedly connected with the middle plate through threads, the spring is sleeved on the rod body, and two ends of the spring respectively abut against the lower jig connecting plate and the middle plate.
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| CN202011036398.6A CN111879471B (en) | 2020-09-28 | 2020-09-28 | Lever up-pressing type plugging tool for airtightness detection |
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| CN202011036398.6A CN111879471B (en) | 2020-09-28 | 2020-09-28 | Lever up-pressing type plugging tool for airtightness detection |
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| CN111879471B (en) | 2020-12-25 |
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