CN114754946A - New energy automobile turns to motor casing gas tightness testing arrangement - Google Patents
New energy automobile turns to motor casing gas tightness testing arrangement Download PDFInfo
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- 238000003825 pressing Methods 0.000 claims abstract description 61
- 238000007789 sealing Methods 0.000 claims description 76
- 238000001125 extrusion Methods 0.000 claims description 37
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- 239000007921 spray Substances 0.000 description 2
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
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- 241001330002 Bambuseae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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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 belongs to the technical field of new energy automobiles, and particularly relates to a device for testing the air tightness of a steering motor shell of a new energy automobile, which comprises a pressing piece and an inflatable base; the lower pressing piece comprises a cylinder, a lower pressing plate, a supporting plate, a cylinder and a guide rod; the four right-angle positions of the supporting plate are fixedly connected with one ends of the four guide rods respectively, the supporting plate is fixedly connected with an air cylinder, the output end of the air cylinder points to the other end of the guide rod, and the output end of the air cylinder is fixedly connected with a lower pressing plate; through this gas tightness testing arrangement, detect work piece gas tightness to every one by, guarantee to dispatch from the factory and be qualified product for it can guarantee to turn to the normal and long-time operation of motor when putting into use, and this gas tightness testing arrangement, for semi-automatization mode, compare pure manual test, and the effect is high, this gas tightness testing arrangement moreover, simple structure, the simple operation.
Description
Technical Field
The invention belongs to the technical field of new energy automobiles, and particularly relates to a device for testing the air tightness of a steering motor shell of a new energy automobile.
Background
The new energy automobile has obvious effect on reducing air pollution degree and relieving energy shortage, under the environment of low carbon and environmental protection advocated in the world at present, the new energy automobile industry will become the main direction of development of the future automobile industry, and the continuous and large rise of oil price, and more people are willing to select the new energy automobile.
In automobile parts, many parts have higher requirements on air tightness, so the air tightness needs to be detected before delivery, the air tightness detection is an important process for ensuring the product quality and the production safety, and the function of the air tightness detection in the production process is widely accepted;
the steering motor is used as one of accessories of a new energy automobile, is used for assisting a driver to rotate a steering wheel and reducing the operation strength of the driver for rotating the steering wheel, and various accessories are needed by the steering motor; the steering motor casing of the new energy automobile cannot be applied to the existing air tightness testing device due to the shape factor of the shape, air tightness accuracy is difficult to guarantee through manual operation testing with high flexibility, efficiency is low, and the steering motor casing of the new energy automobile needs to strictly control quality and guarantee safe and stable operation of the new energy automobile as one of important accessories on the automobile.
Therefore, the invention provides a device for testing the air tightness of a steering motor shell of a new energy automobile.
Disclosure of Invention
To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a device for testing the air tightness of a steering motor shell of a new energy automobile, which comprises a pressing piece and an inflating base, wherein the pressing piece is connected with the inflating base through a connecting piece; the lower pressing piece comprises a cylinder, a lower pressing plate, a supporting plate, a cylinder and a guide rod; four right-angle positions of the supporting plate are fixedly connected with one end of each guide rod respectively, an air cylinder is fixedly connected to the supporting plate, the output end of the air cylinder points to the other end of each guide rod, the output end of the air cylinder is fixedly connected with a lower pressing plate, the four right-angle positions of the lower pressing plate are connected with the guide rods in a sliding mode, the lower surface of the lower pressing plate is fixedly connected with one end of a cylinder, an annular sealing gasket is arranged in the cylinder, an inflating base is arranged below the cylinder, the four right-angle positions of the inflating base are fixedly connected with the other end of each guide rod, a groove is formed in the inflating base, a limiting column is arranged in the groove, a rubber pad is arranged at the inner edge of the groove, a workpiece to be detected is placed in the inner space of the groove, an air passage is formed in the inflating base, the air outlet end of the air passage penetrates through the surface of the groove, the air inlet end of the air passage is communicated with an air inlet pipe on one side of the inflating base, and the air inlet pipe is communicated with an external air supply pump; the method comprises the following steps that a workpiece to be detected is a steering motor shell of a new energy automobile, the workpiece to be detected is sleeved on a limiting column, the lower surface of the workpiece to be detected is located in a groove, then a cylinder is driven to push down a lower pressing plate, a cylinder on the lower pressing plate covers the upper end of the workpiece to be detected, meanwhile, the upper portion of the workpiece to be detected is pushed against a sealing pad, the lower surface of the workpiece to be detected is extruded on a rubber pad, at the moment, quantitative gas is blown into an air inlet pipe through an air supply pump, a pressure gauge on the air inlet pipe displays a numerical value, the current situation is kept, whether the numerical value of the pressure gauge is reduced or not is observed, if the numerical value is reduced, a gas leakage position point is shown on the workpiece to be detected, and the workpiece to be detected is cast with a flaw and cannot be put into use; through this gas tightness testing arrangement, detect work piece gas tightness to every one by, guarantee to dispatch from the factory and be qualified product for it can guarantee to turn to the normal and long-time operation of motor when putting into use, and this gas tightness testing arrangement, for semi-automatization mode, compare pure manual test, and the effect is high, this gas tightness testing arrangement moreover, simple structure, the simple operation.
Preferably, the sealing gasket comprises a circular table part and a base body; a first step groove is formed in the inner top surface of the base body, a second step groove is formed in the inner bottom surface of the first step groove, a circular table portion is fixedly connected to the middle position in the inner top surface of the second step groove, the large end surface of the circular table portion is fixedly connected to the inner top of the second step groove, and the small end surface of the circular table portion is embedded into the upper port of a workpiece to be detected; this treat work piece up end of examining is the ladder form, treat that the work piece is placed back on inflating the base, the drum pushes down, the drum cover is treating the work piece upper end of examining, treat the upper end embedding of work piece in the annular gap between second ladder groove and round platform portion, the drum portion embedding is treating in treating the work piece up end mouth simultaneously, treat the upper end of work piece this moment and be blocked up by the shutoff, promptly, treat that the work piece upper end is when sealed, still treat the upper end first platform of work piece through the round platform portion shutoff, cooperation between this base member and the round platform portion, benefit from the leakproofness between improvement sealed pad and the work piece of treating, when making to inflate the test gas tightness, and is more accurate.
Preferably, the outer edge of the inner top surface of the first step groove is provided with a squeezing bag; a first cavity is formed in the circular table part, a second annular cavity is formed in the large end face wall of the circular table part, and the second cavity is communicated with the extrusion bag through a pipeline; the second platform is located below the first platform and extrudes the extrusion bag, gas in the extrusion bag is input into the second cavity through a pipeline, the second cavity is expanded and extruded on the inner side wall of the upper port of the workpiece to be detected, and the sealing performance between the outer ring of the circular table portion and the upper port of the workpiece to be detected is improved, so that the air tightness is improved.
Preferably, the lower end of the circular table part is provided with a top column, one end of the top column is exposed at the lower end of the circular table part, the other end of the top column is arranged in the first cavity, the other end of the top column is provided with a disc, the disc is in a pot cover shape, the convex surface of the disc faces downwards, and the edge of the disc is fixedly connected to the inclined part in the circular table part; after the round platform portion stretches into and waits to detect work piece upper end mouth, the fore-set top of round platform portion lower extreme is on spacing post, the fore-set shifts up, and promote the disc, the disc is made by PVC elastic material, the edge of disc supports to the outer lane, and with the slope outer crown of round platform portion, and the extrusion is on waiting to detect work piece upper end mouth inside wall, make more surfaces of round platform portion with wait to detect the work piece contact, and the shape setting of round platform portion, it inserts round platform portion to conveniently wait to detect work piece upper end mouth, more areas of round platform portion with wait to detect the work piece contact, thereby improve the gas tightness, make the test result more accurate.
Preferably, the upper surface of the disc is provided with a plurality of ejector rods, the ejector rods are arranged in a circumferential array, one end of each ejector rod is fixedly connected to the eccentric position of the upper surface of the disc, and the other end of each ejector rod is fixedly connected to the side wall of the first cavity and arranged close to the inner bottom surface of the second cavity; the upper surface indent of disc is gone up gradually to push up the ejector pin in the slope, the other end extrusion No. two cavity lateral wall positions of ejector pin, bulge the deformation trend to No. two cavities and play the limiting action, make No. two cavity lower part positions bulge the back, bulge the extrusion force to the ejector pin, the reaction is at No. two cavities, make the disk portion intermediate position still can closely attached on waiting to detect work piece upper end mouth inside wall, improve sealed the pad and wait to detect the leakproofness between the work piece.
Preferably, a plurality of extrusion grooves are formed in the edge position of the inner surface of the base body; a plurality of placing grooves are formed in the inner side wall of the lower end of the cylinder, the positions of the placing grooves correspond to the extrusion grooves one by one, atomizing nozzles are arranged in the placing grooves, and an oil supply unit is arranged between the atomizing nozzles and the extrusion grooves; the oil supply unit comprises a piston rod, a piston cylinder, an oil inlet pipe and an oil outlet pipe; one end of the piston rod is fixedly connected to the inner bottom surface of the extrusion groove, the other end of the piston rod is connected to the piston cylinder in a sealing and sliding mode, the piston cylinder is fixedly connected to the inner bottom surface of the extrusion groove, the piston cylinder is fixedly connected with an oil inlet pipe and an oil outlet pipe, the oil inlet pipe is located above the oil outlet pipe and communicated with an external oil drum, the oil outlet pipe is arranged along the inner portion of the side wall of the cylinder and communicated with an atomizing nozzle, and the spraying direction of the atomizing nozzle is arranged in an inclined and upward mode; treat the upper end second platform extrusion base member of treating the work piece, the base member upwards extrudees the piston rod, piston rod inner space is big, the negative pressure increases, and through advancing oil pipe, with external sealed oil suction piston cylinder in, when treating that the work piece breaks away from sealed the pad, the base member leans on self elasticity to resume initial condition, pull-down piston rod simultaneously, the piston rod extrudees along an oil pipe with the sealed oil in which section of thick bamboo of piston head, and from atomizer blowout, spray on the round platform portion surface, treat when treating next and treat that the work piece is placed, the round platform portion embedding is treated the work piece upper port in, sealed oil coating is treating and is treated the work piece upper port in, make round platform portion lateral wall and treat and form one deck sealed oil film between the work piece upper port inner wall, improve the round platform portion once more and treat the leakproofness between the work piece of treating, improve gas tightness test accuracy nature.
Preferably, a plurality of semicircular grooves are formed in the lower semi-inclined surface of the circular table part, hook-shaped rubber tentacles are arranged in the semicircular grooves, the straight ends of the rubber tentacles are fixedly connected to the lower edge positions of the semicircular grooves, hooks of the rubber tentacles are arranged upwards, and concave points are arranged in the inner concave surfaces of the hook positions; the sealing oil is sprayed on the surface of the circular table part, and if the workpiece to be detected cannot be placed on the inflatable base in time, the sealing oil flows downwards along the surface of the circular table part and flows onto the inflatable base, so that the sealing oil pollutes the working environment, and after the workpiece to be detected is placed, a sealing ring on the surface of the circular table part drips, and the sealing oil cannot form oil film sealing; and through setting up half slot and rubber tentacle for partial sealing oil remains and preserves the post, and sealing oil trickles in the half slot, and in the rubber tentacle, when making next work piece that awaits measuring carry out the gas tightness test, can stably remain sufficient sealing oil on the round platform portion to and be provided with the concave point in the interior concave surface at hook position, make the rubber tentacle can take up more sealing oil, benefit from the shaping of sealed oil film.
Preferably, the bottom surface in the groove is provided with a plurality of concave parts, the concave parts are internally provided with buffering air bags, the buffering air bags are closed bag bodies, and the buffering air bags are in clearance fit in the concave parts; through setting up the buffering gasbag, when placing and treat the work piece, treat that the work piece is withstood by the buffering gasbag in advance, treat and leave the clearance between work piece and the recess, prevent to treat that the work piece lower surface collides with the bottom surface in the recess, cause and treat the damage of work piece surface, and buffering gasbag clearance fit is in the concave part, when treating the work piece under the pushing down, treat that the work piece pushes down the buffering gasbag, buffering gasbag compression to concave part, make the recess internal surface smooth and level, no protrusion pushes up and treats the work piece bottom surface, guarantee to treat the leakproofness between work piece lower surface and the recess.
Preferably, the lower surface of the lower pressing plate is fixedly connected with an auxiliary lower pressing rod, one end of the auxiliary lower pressing rod is fixedly connected to the lower pressing plate, the other end of the auxiliary lower pressing rod points to the groove, and the auxiliary lower pressing rod is positioned on one side of the cylinder; the workpiece to be detected is integrally pressed down by arranging the auxiliary pressing rod, so that the integral pressure of the workpiece to be detected is balanced, the deformation of the workpiece to be detected after being pressed is reduced, and the quality of the workpiece to be detected is ensured.
Preferably, the lower end of the auxiliary lower pressure lever is fixedly connected with a PVC block, and the lower end surface of the cylinder is fixedly connected with a PVC ring; set up PVC piece and PVC ring, firstly prevent to wait to detect the work piece when placing, wait to detect the work piece surface mistake and touch drum or supplementary depression bar down, cause and wait to detect the work piece surface impaired, secondly prevent to detect the work piece surface other drum or supplementary depression bar and push out the indentation down, prevent to cause and wait to detect the work piece surface damage, play and treat the function of detecting work piece buffer protection.
The invention has the following beneficial effects:
1. according to the air tightness testing device for the steering motor shell of the new energy automobile, air tightness of each workpiece to be tested is detected one by one through the air tightness testing device, and the outgoing of the workpieces is guaranteed to be qualified products, so that the steering motor can be guaranteed to normally operate for a long time when the steering motor is put into use.
2. According to the device for testing the air tightness of the steering motor shell of the new energy automobile, the sealing performance between the sealing gasket and the workpiece to be tested is improved due to the matching between the base body and the circular table portion, so that the air tightness is more accurately tested in an inflation mode, the second platform at the upper end of the workpiece to be tested is positioned below the first platform and extrudes the extrusion bag, meanwhile, gas in the extrusion bag is input into the second cavity through the pipeline, the second cavity is expanded and extruded on the inner side wall of the upper end opening of the workpiece to be tested, the sealing performance between the outer ring of the circular table portion and the upper end opening of the workpiece to be tested is improved, and therefore the air tightness is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of a test apparatus according to the present invention;
FIG. 2 is a view of the lower platen of the present invention in cooperation with a workpiece to be inspected;
FIG. 3 is a cross-sectional view of the barrel of the present invention;
FIG. 4 is a view showing the engagement of the rubber tentacles with the semicircular grooves in the present invention;
FIG. 5 is a perspective view of a workpiece to be inspected in the present invention;
FIG. 6 is a cross-sectional view of the inflatable base of the present invention;
FIG. 7 is a view showing the combination of the PVC block and the auxiliary lower pressing rod, and the PVC ring and the cylinder in the present invention;
in the figure: the device comprises a lower pressing piece 1, an inflatable base 2, a workpiece 3 to be detected, a cylinder 4, a lower pressing plate 5, a supporting plate 6, a cylinder 7, a guide rod 8, a sealing gasket 9, a groove 10, a limiting column 11, a rubber gasket 12, an air channel 13, an air inlet pipe 14, a circular table portion 15, a base body 16, a first stepped groove 17, a second stepped groove 18, an annular gap 19, a first platform 20, an extrusion bag 21, a first cavity 22, a second cavity 23, a pipeline 24, a second platform 25, a top column 26, a disc 27, a top rod 28, an extrusion groove 29, a placement groove 30, an atomizing nozzle 31, a piston rod 32, a piston cylinder 33, an oil inlet pipe 34, an oil outlet pipe 35, a semicircular groove 36, a rubber touch handle 37, a concave point 38, a concave portion 381, a buffer air bag 39, an auxiliary lower pressing rod 40, a PVC block 41 and a PVC circular ring 42.
Detailed Description
The present invention will be further described with reference to the following detailed description so that the technical means, the creation features, the achievement purposes and the effects of the present invention can be easily understood.
The first embodiment is as follows:
referring to fig. 1 and 6, the air tightness testing device for the steering motor shell of the new energy automobile is used for detecting the air tightness of a workpiece 3 to be detected, namely the steering motor shell of the new energy automobile, and specifically comprises a pressing piece 1 and an inflating base 2; the lower pressing piece 1 comprises a cylinder 4, a lower pressing plate 5, a supporting plate 6, a cylinder 7 and a guide rod 8; four right-angle positions of the supporting plate 6 are respectively and fixedly connected with one ends of four guide rods 8, the supporting plate 6 is fixedly connected with an air cylinder 7, the output end of the air cylinder 7 points to the other ends of the guide rods 8, the output end of the lower pressing plate 5 is fixedly connected with the lower pressing plate 5, four right-angle positions of the lower pressing plate 5 are connected with guide rods 8 in a sliding mode, the lower surface of the lower pressing plate 5 is fixedly connected with one end of a cylinder 4, an annular sealing gasket 9 is arranged in the cylinder 4, an inflatable base 2 is arranged below the cylinder 4, the four right-angle positions of the inflatable base 2 are fixedly connected with the other end of the guide rods 8, a groove 10 is formed in the inflatable base 2, a limiting column 11 is arranged in the groove 10, a rubber gasket 12 is arranged at the inner edge of the groove 10, the space inside the groove 10 is used for placing a workpiece 3 to be detected, an air passage 13 is formed in the inflatable base 2, the air outlet end of the air passage 13 penetrates through the surface of the groove 10, the air inlet end of the air passage 13 is communicated with an air inlet pipe 14 on one side of the inflatable base 2, and the air inlet pipe 14 is communicated with an external air supply pump; the workpiece 3 to be detected is a new energy automobile steering motor shell, the workpiece 3 to be detected is sleeved on a limiting column 11, the lower surface of the workpiece 3 to be detected is located in a groove 10, then a cylinder 7 is driven, the cylinder 7 pushes a lower pressing plate 5 downwards, a cylinder 4 on the lower pressing plate 5 covers the upper end of the workpiece 3 to be detected, meanwhile, the upper end of the workpiece 3 to be detected is propped against a sealing gasket 9, the lower surface of the workpiece 3 to be detected is pressed on a rubber gasket 12, at the moment, a fixed amount of gas is blown into an air inlet pipe 14 through an air supply pump, at the moment, a pressure gauge on the air inlet pipe 14 displays a numerical value, the current situation is kept, whether the numerical value of the pressure gauge is reduced or not is observed, if the numerical value is reduced, a gas leakage position point exists on the workpiece 3 to be detected at the moment, and the fact that the new energy automobile steering workpiece 3 to be detected has a casting defect is indicated, and cannot be put into use; through this gas tightness testing arrangement, to every 3 gas tightness of waiting to detect the work piece and detect one by one, guarantee to dispatch from the factory and be qualified product for it can guarantee to turn to the normal and long-time operation of motor when putting into use, and this gas tightness testing arrangement, for semi-automatization mode, compares pure manual test, and the effect is high, this gas tightness testing arrangement moreover, simple structure, the simple operation.
Referring to fig. 3 and 5, the gasket 9 includes a boss portion 15 and a base body 16; a first step groove 17 is formed in the inner top surface of the base body 16, a second step groove 18 is formed in the inner bottom surface of the first step groove 17, a circular table portion 15 is fixedly connected to the middle position in the inner top surface of the second step groove 18, the large end surface of the circular table portion 15 is fixedly connected to the inner top of the second step groove 18, and the small end surface of the circular table portion 15 is embedded into the upper end opening of the workpiece 3 to be detected; the upper end face of a workpiece 3 to be detected for steering of the new energy automobile is in a step shape, after the workpiece 3 to be detected is placed on the inflatable base 2, the cylinder 4 is pressed downwards, the cylinder 4 covers the upper end of the workpiece 3 to be detected, the upper end of the workpiece 3 to be detected is embedded into an annular gap 19 between the second step groove 18 and the circular table portion 15, meanwhile, the cylinder 4 is embedded into the upper port of the workpiece 3 to be detected, at the moment, the upper end of the workpiece 3 to be detected is blocked, namely, the upper end of the workpiece 3 to be detected is sealed, the first platform 20 at the upper end of the workpiece 3 to be detected is also blocked by the circular table portion 15, the base body 16 is matched with the circular table portion 15, the sealing performance between the sealing gasket 9 and the workpiece 3 to be detected is improved, and the air tightness testing is more accurate.
Referring to fig. 3 and 5, the outer edge of the inner top surface of the first step groove 17 is provided with a pressing bag 21; a first cavity 22 is formed in the circular table part 15, a second annular cavity 23 is formed in the large end wall of the circular table part 15, and the second cavity 23 is communicated with the extrusion bag 21 through a pipeline 24; the second platform 25 of waiting to detect work piece 3 upper end, the second platform 25 is located the below of first platform 20, and second platform 25 extrudees the extrusion bag 21, and the gas in the extrusion bag 21 passes through pipeline 24 simultaneously and inputs to two cavitys in, and No. two cavitys 23 get gas and expand to extrude on waiting to detect work piece 3 upper end mouth inside wall, improve the leakproofness between the outer lane of round platform portion 15 and the work piece 3 upper end mouth that detects, thereby improve the gas tightness.
Referring to fig. 3 and 5, a top pillar 26 is arranged at the lower end of the circular table part 15, one end of the top pillar 26 is exposed at the lower end of the circular table part 15, the other end of the top pillar 26 is arranged in the first cavity 22, a disc 27 is arranged at the other end of the top pillar 26, the disc 27 is in a pot cover shape, the convex surface of the disc 27 faces downwards, and the edge of the disc 27 is fixedly connected to an inclined part in the circular table part 15; after round platform portion 15 stretched into and waits to detect work piece 3 upper port in, the fore-set 26 top of round platform portion 15 lower extreme is on spacing post 11, fore-set 26 moves up, and promote disc 27, disc 27 is made by PVC elastic material, the edge of disc 27 supports to the outer circle, and with the slope outer crown of round platform portion 15, and the extrusion is on waiting to detect work piece 3 upper port inside wall, make more surfaces of round platform portion 15 and wait to detect work piece 3 contact, and the shape setting of round platform portion 15, it inserts round platform portion 15 to conveniently wait to detect work piece 3 upper port, more face territories of round platform portion 15 and wait to detect work piece 3 contact, thereby improve the gas tightness, make the test result more accurate.
Referring to fig. 3 and 5, a plurality of ejector rods 28 are arranged on the upper surface of the disc 27, the ejector rods 28 are in a circumferential array, one end of each ejector rod 28 is fixedly connected to an eccentric position on the upper surface of the disc 27, and the other end of each ejector rod 28 is fixedly connected to the side wall of the first cavity 22 and is arranged close to the inner bottom surface of the second cavity 23; concave part position is protruding gradually in the upper surface of disc 27 to push up ejector pin 28 in the slope, the other end of ejector pin 28 extrudees cavity 23 lateral wall position No. two, play the restriction effect to cavity 23 bulging deformation trend No. two, make cavity 23 lower part position bulge the back, bulge the extrusion force to ejector pin 28, the reaction is in cavity 23 No. two, make the round platform portion 15 intermediate position still can closely attached on waiting to detect work piece 3 upper end inside wall, improve sealed the pad 9 and wait to detect the leakproofness between the work piece 3.
Referring to fig. 3 and 5, a plurality of extrusion grooves 29 are formed in the inner edge of the substrate 16; a plurality of placing grooves 30 are formed in the inner side wall of the lower end of the cylinder 4, the placing grooves 30 correspond to the extrusion grooves 29 one by one, atomizing nozzles 31 are arranged in the placing grooves 30, and oil supply units are arranged between the atomizing nozzles 31 and the extrusion grooves 29; the oil supply unit comprises a piston rod 32, a piston cylinder 33, an oil inlet pipe 34 and an oil outlet pipe 35; one end of the piston rod 32 is fixedly connected to the inner bottom surface of the extrusion groove 29, the other end of the piston rod 32 is connected to the piston cylinder 33 in a sealing and sliding manner, the piston cylinder 33 is fixedly connected to the inner bottom surface of the extrusion groove 29, the piston cylinder 33 is fixedly connected with the oil inlet pipe 34 and the oil outlet pipe 35, the oil inlet pipe 34 is positioned above the oil outlet pipe 35, the oil inlet pipe 34 is communicated with an external oil drum, the oil outlet pipe 35 is communicated with the atomizing nozzle 31 along the inner side wall of the cylinder 4, and the spraying direction of the atomizing nozzle 31 is arranged obliquely upwards; the oil inlet pipe 34 and the oil outlet pipe 35 are respectively provided with a one-way valve, the second platform 25 at the upper end of the workpiece 3 to be detected extrudes the base body 16, the base body 16 extrudes the piston rod 32 upwards, the inner space of the piston rod 32 is large, the negative pressure is increased, the external sealing oil is pumped into the piston cylinder 33 through the oil inlet pipe 34, when the workpiece 3 to be detected is separated from the sealing gasket 9, the base body 16 returns to the initial state by the elasticity of the base body 16, the piston rod 32 is pulled downwards, the sealing oil in the piston cylinder 33 is extruded out along the oil outlet pipe 35 by the piston rod 32 and is sprayed out from the atomizing nozzle 31 to be sprayed on the surface of the circular platform part 15, when the next workpiece 3 to be detected is placed, the circular platform part 15 is embedded into the upper port of the workpiece 3 to be detected, the sealing oil is coated in the upper port of the workpiece 3 to be detected, a layer of sealing oil film is formed between the outer side wall of the circular platform part 15 and the inner side wall of the upper port of the workpiece 3 to be detected, and the sealing performance between the circular platform part 15 and the workpiece 3 to be detected is improved again, and the accuracy of the air tightness test is improved.
Referring to fig. 3-4, a plurality of semicircular grooves 36 are formed on the lower semi-inclined surface of the circular table portion 15, hook-shaped rubber tentacles 37 are arranged in the semicircular grooves 36, the straight ends of the rubber tentacles 37 are fixedly connected to the lower edge positions of the semicircular grooves 36, hooks of the rubber tentacles 37 are arranged upwards, and concave points 38 are arranged in the inner concave surfaces of the hook positions; the sealing oil is sprayed on the surface of the circular table part 15, if the workpiece 3 to be detected cannot be placed on the inflatable base 2 in time, the sealing oil flows downwards along the surface of the circular table part 15, and the sealing oil flows on the inflatable base 2, so that the sealing oil pollutes the working environment, and after the workpiece 3 to be detected is placed, a sealing ring on the surface of the circular table part 15 drops, and the sealing oil cannot form oil film sealing; by arranging the semicircular groove 36 and the rubber tentacle 37, part of sealing oil is left to preserve the column, the sealing oil flows in the semicircular groove 36 and the rubber tentacle 37, so that when the next workpiece 3 to be detected is subjected to air tightness test, enough sealing oil can be stably preserved on the circular table part 15, and concave points 38 are arranged in the concave surface of the hook part, so that the rubber tentacle 37 can contain more sealing oil, and the sealing oil film is formed;
referring to fig. 6, a plurality of recesses 381 are formed in the inner bottom surface of the groove 10, a buffer air bag 39 is disposed in the recesses 381, the buffer air bag 39 is a closed bag body, and the buffer air bag 39 is in clearance fit in the recesses 381; through setting up buffering gasbag 39, when placing and wait to detect work piece 3, wait to detect work piece 3 and be withstood by buffering gasbag 39 in advance, wait to detect and leave the clearance between work piece 3 and the recess 10, prevent to detect that the work piece 3 lower surface of detecting collides with the bottom surface in the recess 10, cause and wait to detect the damage on work piece 3 surface, and buffering gasbag 39 clearance fit is in concave part 381, when waiting to detect work piece 3 in the push down, wait to detect work piece 3 and push down buffering gasbag 39, buffering gasbag 39 compresses to concave part 381, make recess 10 internal surface smooth and flat, no protrusion pushes up and waits to detect work piece 3 bottom surface, guarantee to detect the leakproofness between work piece 3 lower surface and the recess 10.
Referring to fig. 1-2, an auxiliary lower pressing rod 40 is fixedly connected to the lower surface of the lower pressing plate 5, one end of the auxiliary lower pressing rod 40 is fixedly connected to the lower pressing plate 5, the other end of the auxiliary lower pressing rod 40 points to the groove 10, and the auxiliary lower pressing rod 40 is located on one side of the cylinder 4; the workpiece 3 to be detected is integrally pressed down by arranging the auxiliary pressing rod 40, so that the integral pressure of the workpiece 3 to be detected is balanced, the deformation quantity of the pressed workpiece 3 to be detected is reduced, and the quality of the workpiece 3 to be detected is ensured.
During the process of carrying out the air tightness test on the workpiece 3, gas overflows, which is caused by the workpiece itself, namely the workpiece 3 has flaws and a surface leak, and is caused by insufficient tightness between the detection device and the workpiece 3; the sealing performance between the workpiece 3 and the apparatus is improved by a series of sealing structure designs, but there is a possibility that the sealing performance is insufficient, in order to verify the problem of gas leakage due to insufficient tightness between the workpiece 3 to be inspected and the device, the sealing oil can be replaced by a solution with bubbles such as soapy water or washing water, the atomizing nozzle 31 sprays the soapy water on the surface of the circular table part 15, part of the soapy water is adhered to the upper end of the workpiece 3 to be detected in the process that the upper end of the workpiece 3 to be detected is embedded in the circular table part 15, and then, performing an inflation test, taking down the workpiece 3 to check whether dense bubbles exist around the circular table part 15 or not if the air pressure changes after quantitative air is filled, and if the dense bubbles exist, indicating that the sealing performance between the detection device and the workpiece 3 is insufficient, performing sealing performance adjustment setting on the detection device, and then performing a secondary air tightness test on the workpiece 3.
Example two:
referring to fig. 7, in a first comparative example, as another embodiment of the present invention, a PVC block 41 is fixedly connected to a lower end of the auxiliary lower compression bar 40, and a PVC ring 42 is fixedly connected to a lower end surface of the cylinder 4; the PVC blocks 41 and the PVC rings 42 are arranged, so that the surface of the workpiece 3 to be detected is prevented from being mistakenly touched with the cylinder 4 or the auxiliary lower pressing rod 40 when the workpiece 3 to be detected is placed, the surface of the workpiece 3 to be detected is prevented from being damaged, the indentation pressed out by the other cylinder 4 or the auxiliary lower pressing rod 40 on the surface of the workpiece 3 to be detected is prevented, the surface damage of the workpiece 3 to be detected is prevented, and the function of buffer protection of the workpiece 3 to be detected is achieved.
The working principle is as follows: the workpiece 3 to be detected is a new energy automobile steering motor shell, the workpiece 3 to be detected is sleeved on a limiting column 11, the lower surface of the workpiece 3 to be detected is located in a groove 10, then a cylinder 7 is driven, the cylinder 7 pushes a lower pressing plate 5 downwards, a cylinder 4 on the lower pressing plate 5 covers the upper end of the workpiece 3 to be detected, meanwhile, the upper end of the workpiece 3 to be detected is propped against a sealing gasket 9, the lower surface of the workpiece 3 to be detected is extruded on a rubber gasket 12, at the moment, a fixed amount of gas is blown into an air inlet pipe 14 through an air supply pump, at the moment, a pressure gauge on the air inlet pipe 14 displays a numerical value, the current situation is kept, whether the numerical value of the pressure gauge is reduced or not is observed, if the numerical value is reduced, a gas leakage position point is shown on the workpiece 3 to be detected at the moment, and the new energy automobile steering workpiece 3 to be detected is indicated to be flawed and cannot be put into use; through the air tightness testing device, the air tightness of each workpiece 3 to be detected is detected one by one, and the qualified products can be guaranteed when the workpiece is delivered out of a factory, so that the steering motor can be guaranteed to normally operate for a long time when the workpiece is put into use;
the upper end face of a workpiece 3 to be detected of the new energy automobile is in a step shape, after the workpiece 3 to be detected is placed on the inflatable base 2, the cylinder 4 is pressed downwards, the cylinder 4 covers the upper end of the workpiece 3 to be detected, the upper end of the workpiece 3 to be detected is embedded into an annular gap 19 between the second step groove 18 and the circular table portion 15, meanwhile, the cylinder 4 is embedded into the upper port of the workpiece 3 to be detected, at the moment, the upper end of the workpiece 3 to be detected is blocked, namely, the upper end of the workpiece 3 to be detected is sealed, the upper end of the workpiece 3 to be detected is also blocked by the circular table portion 15, the base body 16 is matched with the circular table portion 15, and the sealing performance between the sealing gasket 9 and the workpiece 3 to be detected is improved, so that the inflation test is more accurate;
the second platform 25 is positioned below the first platform 20, the second platform 25 extrudes the extrusion bag 21, meanwhile, gas in the extrusion bag 21 is input into the second cavity through a pipeline 24, the second cavity 23 expands and extrudes on the inner side wall of the upper port of the workpiece 3 to be detected, and the sealing property between the outer ring of the circular platform part 15 and the upper port of the workpiece 3 to be detected is improved, so that the air tightness is improved;
after the circular table part 15 extends into the upper port of the workpiece 3 to be detected, the top column 26 at the lower end of the circular table part 15 is propped against the limiting column 11, the top column 26 moves upwards and pushes the disc 27, the disc 27 is made of PVC elastic material, the edge of the disc 27 supports towards the outer ring, the inclined part of the circular table part 15 is propped outwards and is extruded on the inner side wall of the upper port of the workpiece 3 to be detected, more surfaces of the circular table part 15 are in contact with the workpiece 3 to be detected, the shape of the circular table part 15 is set, the upper port of the workpiece 3 to be detected is convenient to insert into the circular table part 15, more surface areas of the circular table part 15 are in contact with the workpiece 3 to be detected, the air tightness is improved, and the test result is more accurate;
the upper surface of the disc 27 is concave upwards gradually, the push rod 28 is pushed upwards in an inclined manner, the other end of the push rod 28 extrudes the outer side wall of the cavity II 23, the bulging deformation trend of the cavity II 23 is limited, the extrusion force of the push rod 28 is expanded after the lower part of the cavity II 23 is bulged, and the extrusion force is reacted in the cavity II 23, so that the middle position of the circular table part 15 can still be tightly attached to the inner side wall of the upper port of the workpiece 3 to be detected, and the sealing performance between the sealing gasket 9 and the workpiece 3 to be detected is improved;
the second platform 25 at the upper end of the workpiece 3 to be detected extrudes the base body 16, the base body 16 extrudes the piston rod 32 upwards, the inner space of the piston rod 32 is large, the negative pressure is increased, the external sealing oil is pumped into the piston cylinder 33 through the oil inlet pipe 34, when the workpiece 3 to be detected is separated from the sealing gasket 9, the base body 16 is restored to the initial state by the elasticity of itself, meanwhile, the piston rod 32 is pulled down, the piston rod 32 presses out the sealing oil in which cylinder of the piston head along the oil outlet pipe 35, and the sealing oil is sprayed out from the atomizing nozzle 31 and sprayed on the surface of the circular table part 15, when the next workpiece 3 to be detected is placed, the circular table part 15 is embedded into the upper port of the workpiece 3 to be detected, and sealing oil is coated in the upper port of the workpiece 3 to be detected, so that a layer of sealing oil film is formed between the outer side wall of the circular table part 15 and the inner side wall of the upper port of the workpiece 3 to be detected, the sealing property between the circular table part 15 and the workpiece 3 to be detected is improved again, and the air tightness test accuracy is improved;
the sealing oil is sprayed on the surface of the circular table part 15, if the workpiece 3 to be detected cannot be placed on the inflatable base 2 in time, the sealing oil flows downwards along the surface of the circular table part 15, and the sealing oil flows on the inflatable base 2, so that the sealing oil pollutes the working environment, and after the workpiece 3 to be detected is placed, a sealing ring on the surface of the circular table part 15 drops, and the sealing oil cannot form oil film sealing; by arranging the semicircular groove 36 and the rubber tentacle 37, part of sealing oil is left to preserve the column, the sealing oil flows in the semicircular groove 36 and the rubber tentacle 37, so that when the next workpiece 3 to be detected is subjected to air tightness test, enough sealing oil can be stably preserved on the circular table part 15, and concave points 38 are arranged in the concave surface of the hook part, so that the rubber tentacle 37 can contain more sealing oil, and the sealing oil film is formed;
by arranging the buffer air bag 39, when the workpiece 3 to be detected is placed, the workpiece 3 to be detected is supported by the buffer air bag 39 in advance, a gap is reserved between the workpiece 3 to be detected and the groove 10, the lower surface of the workpiece 3 to be detected is prevented from colliding with the inner bottom surface of the groove 10 to cause damage to the surface of the workpiece 3 to be detected, the buffer air bag 39 is in clearance fit in the concave portion 381, when the workpiece 3 to be detected is pressed downwards, the buffer air bag 39 is compressed to the concave portion 381, the inner surface of the groove 10 is smooth and flat, no protrusion is arranged to support the bottom surface of the workpiece 3 to be detected upwards, and the sealing performance between the lower surface of the workpiece 3 to be detected and the groove 10 is ensured;
the auxiliary lower pressing rod 40 is arranged to press the whole workpiece 3 to be detected, so that the whole workpiece 3 to be detected is pressed and balanced, the deformation amount of the pressed workpiece 3 to be detected is reduced, and the quality of the workpiece 3 to be detected is ensured; the PVC block 41 and the PVC ring 42 are arranged, so that firstly, the surface of the workpiece 3 to be detected is prevented from being mistakenly touched with the cylinder 4 or the auxiliary lower pressing rod 40 when the workpiece 3 to be detected is placed, so that the surface of the workpiece 3 to be detected is damaged, secondly, the surface of the workpiece 3 to be detected is prevented from being pressed out of an indentation by the other cylinder 4 or the auxiliary lower pressing rod 40, so that the surface of the workpiece 3 to be detected is prevented from being damaged, and a function of buffer protection of the workpiece 3 to be detected is achieved.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a new energy automobile turns to motor casing gas tightness testing arrangement which characterized in that: comprises a lower pressing piece (1) and an inflatable base (2); the lower pressing piece (1) comprises a cylinder (4), a lower pressing plate (5), a supporting plate (6), a cylinder (7) and a guide rod (8); four right angle positions of the supporting plate (6) are fixedly connected with one end of four guide rods (8) respectively, a cylinder (7) is fixedly connected onto the supporting plate (6), the output end of the cylinder (7) points to the other end of the guide rod (8), the output end is fixedly connected with a lower pressing plate (5), the four right angle positions of the lower pressing plate (5) are slidably connected with the guide rods (8), the lower surface of the lower pressing plate (5) is fixedly connected with one end of a cylinder (4), a ring-shaped sealing gasket (9) is arranged in the cylinder (4), an inflatable base (2) is arranged below the cylinder (4), the four right angle positions of the inflatable base (2) are fixedly connected with the other end of the guide rod (8), a groove (10) is formed in the inflatable base (2), a limiting column (11) is arranged in the groove (10), a rubber gasket (12) is arranged on the inner edge of the groove (10), a workpiece (3) to be detected is placed in the inner space of the groove (10), an air passage (13) is formed in the inflatable base (2), the air outlet end of the air passage (13) penetrates through the surface of the groove (10), the air inlet end of the air passage (13) is communicated with an air inlet pipe (14) on one side of the inflating base (2), and the air inlet pipe (14) is communicated with an external air supply pump.
2. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 1, is characterized in that: the sealing gasket (9) comprises a circular table part (15) and a base body (16); first ladder groove (17) is seted up to top surface in base member (16), and second ladder groove (18) are seted up to the bottom surface in first ladder groove (17), in second ladder groove (18) the top surface, intermediate position rigid coupling boss portion (15), the big terminal surface rigid coupling of boss portion (15) pushes up in second ladder groove (18), and the little terminal surface embedding of boss portion (15) is examined and is detected in detection work piece (3) up port.
3. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 2, is characterized in that: the outer edge of the inner top surface of the first step groove (17) is provided with an extrusion bag (21); a first cavity (22) is formed in the circular table portion (15), a second annular cavity (23) is formed in the large end face wall of the circular table portion (15), and the second cavity (23) is communicated with the extrusion bag (21) through a pipeline (24).
4. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 3, wherein: the lower end of the round table part (15) is provided with a top column (26), one end of the top column (26) is exposed at the lower end of the round table part (15), the other end of the top column (26) is arranged in the first cavity (22), the other end which is supported by the top column is provided with a disc (27), the disc (27) is in a pot cover shape, the convex surface of the disc (27) faces downwards, and the edge of the disc (27) is fixedly connected with an inclined part in the round table part (15).
5. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 4, is characterized in that: the upper surface of disc (27) is equipped with a plurality of ejector pins (28), and ejector pin (28) become the circumference array, and the one end rigid coupling of ejector pin (28) is in disc (27) upper surface eccentric position, and the other end rigid coupling of ejector pin (28) is on cavity (22) lateral wall No. one, and is close to in No. two cavity (23) bottom surface position setting.
6. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 2, is characterized in that: a plurality of extrusion grooves (29) are formed in the edge position of the inner surface of the base body (16); a plurality of placing grooves (30) are formed in the inner side wall of the lower end of the cylinder (4), the placing grooves (30) correspond to the extrusion grooves (29) one by one, atomizing nozzles (31) are arranged in the placing grooves (30), and an oil supply unit is arranged between each atomizing nozzle (31) and each extrusion groove (29); the oil supply unit comprises a piston rod (32), a piston cylinder (33), an oil inlet pipe (34) and an oil outlet pipe (35); the one end rigid coupling of piston rod (32) bottom surface in extrusion groove (29), the sealed sliding connection of the other end of piston rod (32) is in piston cylinder (33), piston cylinder (33) rigid coupling bottom surface in extrusion groove (29), piston cylinder (33) are gone up the rigid coupling and are advanced oil pipe (34) and go out oil pipe (35), advance oil pipe (34) and be located out oil pipe (35) top, advance oil pipe (34) intercommunication external oil drum, it is inside drum (4) lateral wall to go out oil pipe (35), and intercommunication atomizer (31), the injection direction slope of atomizer (31) upwards sets up.
7. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 4, is characterized in that: a plurality of semicircular grooves (36) are formed in the lower semicircular plane of the circular table portion (15), hook-shaped rubber tentacles (37) are arranged in the semicircular grooves (36), the straight ends of the rubber tentacles (37) are fixedly connected to the lower edge of the semicircular grooves (36), hooks of the rubber tentacles (37) are arranged upwards, and concave points (38) are arranged in the inner concave surfaces of the hook positions.
8. The device for testing the airtightness of the steering motor shell of the new energy automobile according to claim 1, is characterized in that: a plurality of concave parts (381) are formed in the inner bottom surface of the groove (10), a buffer air bag (39) is arranged in each concave part (381), the buffer air bag (39) is a closed bag body, and the buffer air bags (39) are in clearance fit in the concave parts (381).
9. The device for testing the airtightness of the motor shell of the new energy automobile steering unit according to claim 1, is characterized in that: the lower surface of the lower pressing plate (5) is fixedly connected with an auxiliary lower pressing rod (40), one end of the auxiliary lower pressing rod (40) is fixedly connected to the lower pressing plate (5), the other end of the auxiliary lower pressing rod (40) points to the groove (10), and the auxiliary lower pressing rod (40) is located on one side of the cylinder (4).
10. The device for testing the airtightness of the steering motor shell of the new energy automobile according to claim 9, characterized in that: the lower end of the auxiliary lower pressing rod (40) is fixedly connected with a PVC block (41), and the lower end face of the cylinder (4) is fixedly connected with a PVC ring (42).
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| CN202210490825.0A CN114754946B (en) | 2022-05-07 | 2022-05-07 | New energy automobile turns to motor housing gas tightness testing arrangement |
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| CN115265954A (en) * | 2022-07-26 | 2022-11-01 | 无锡正杰机械科技有限公司 | Device and method for detecting air tightness of automobile turbine shell |
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