An exhaust valve spool assembly and assembly apparatus

Abstract

The application provides an exhaust valve core assembly and an assembling device, and belongs to the technical field of valves. The valve core assembly comprises a bottom cover, an outer cover, a sealing gasket, a spring and a rivet. The back surface of the outer cover is provided with a groove part, the bottom cover is arranged in the groove part, the sealing gasket is arranged in abutment between the bottom cover and the outer cover, the center of the bottom cover, the outer cover and the sealing gasket is coaxially provided with a through hole, the rivet passes through the through holes of the outer cover, the sealing gasket and the bottom cover in sequence to form riveting, the front surface of the outer cover is provided with an air hole, the front surface of the outer cover is provided with a sunken part, the side of the sunken part towards the sealing gasket forms an upper annular ridge, the upper annular ridge abuts against the sealing gasket to form sealing, and a cavity is formed between the inner side of the upper annular ridge and the sealing gasket. The valve core assembly effectively solves the problem of loose sealing caused by plane contact. The upper annular ridge reduces the contact area of the sealing gasket and the outer cover, and the cavity design reduces the risk of adhesion of the two after long-term sealing, so that the opening force of the valve core is stable.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and specifically to an exhaust valve core assembly and assembly equipment. Background Technology

[0002] The exhaust valve core assembly is the core functional component of the exhaust valve. It is widely used in pressure vessels, pipelines, HVAC equipment and other scenarios to automatically discharge air or other gases from the system and prevent air blockage from affecting the normal operation of the equipment. Its sealing performance and structural stability directly determine the reliability of the exhaust valve.

[0003] In the prior art, the back of the outer cover of the valve core assembly is mostly a flat structure. When it comes into contact with the sealing gasket, uneven force can easily lead to poor sealing. In addition, the sealing gasket in flat contact with the back of the outer cover is prone to sticking, which can cause abnormal changes in the valve core opening force and affect the normal operation of the exhaust valve. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an exhaust valve core assembly and assembly equipment.

[0005] The technical solution adopted by the present invention is as follows: In a first aspect, this application provides an exhaust valve core assembly, including a bottom cover, an outer cover, a sealing gasket, a spring, and a rivet. The back of the outer cover is provided with a groove, the bottom cover is disposed in the groove and has a positioning groove on its back. The sealing gasket is abutted between the bottom cover and the outer cover. The bottom cover, the outer cover, and the sealing gasket are all coaxially provided with through holes at their centers. The rivet passes through the through holes of the outer cover, the sealing gasket, and the bottom cover in sequence to form a riveting connection. The spring is sleeved on the rivet and abuts between the rivet head and the front of the outer cover. The front of the outer cover has an air hole. Under the action of the spring, the sealing gasket closes the air hole. The front of the outer cover has a recessed portion. The recessed portion forms an upper annular ridge on the side facing the sealing gasket. The upper annular ridge abuts against the sealing gasket to form a seal. A cavity is formed between the inner side of the upper annular ridge and the sealing gasket. The air hole is opened on the inner side of the upper annular ridge and communicates with the cavity.

[0006] In some embodiments, the bottom cover has a lower annular ridge on the side facing the sealing gasket, the lower annular ridge abutting against the sealing gasket to form a seal, and the part where the upper annular ridge abuts against the lower annular ridge and the sealing gasket is set as an arc-shaped surface.

[0007] In some embodiments, the rivet includes a head, a first rod, and a second rod arranged sequentially. A rivet hole is provided at the end of the second rod. A step is formed at the junction of the first rod and the second rod. The edge of the through hole of the bottom cover abuts against the step. The first rod is clearance-fitted with the through hole of the outer cover and interference-fitted with the through hole of the sealing gasket.

[0008] In some embodiments, a flow channel is provided between the sealing gasket and the outer wall of the bottom cover and the inner wall of the groove portion, and an inclined conical surface is provided on the outer side of the upper annular ridge, with an arc-shaped surface connected to the end of the inclined conical surface, and the arc-shaped surface connected to the flow channel.

[0009] Secondly, this application provides assembly equipment for assembling an exhaust valve core assembly, including a turntable, a drive mechanism, a bottom cover station, a sealing gasket station, an outer cover station, a spring station, a rivet station, a riveting station, and a testing station. The turntable is circumferentially provided with several outer bases, and an inner base is provided inside each outer base. The drive mechanism drives the turntable to rotate, causing the outer and inner bases to pass through each station. The bottom cover station is used to load the bottom cover onto the outer bases. The sealing gasket station is used to load the sealing gasket onto the inner base; the outer cover station is used to load the outer cover onto the inner base; the spring station is used to load the spring onto the inner base; the rivet station is used to load the rivet onto the inner base and to pick up and move the sealing gasket, outer cover, spring, and rivet onto the bottom cover of the outer base; the riveting station is used to rivet the bottom cover, sealing gasket, outer cover, spring, and rivet onto the outer base; and the testing station is used to pressurize the air vent to test the airtightness of the valve core assembly.

[0010] In some embodiments, the outer base is provided with a first boss that matches the positioning groove of the bottom cover. The first boss has a first channel corresponding to the through hole of the bottom cover. A lower riveting joint is provided in the first channel. The riveting station includes an upper riveting machine and a lower riveting machine respectively located above and below the outer base. The upper riveting machine includes an upper driver and an upper riveting joint. The lower riveting machine includes a lower driver and an adjusting rod. The adjusting rod is located below the lower riveting joint. The inner base is provided with a second boss that matches the groove of the outer cover. The second boss has a second channel for inserting rivets. An alignment rod is provided in the second channel. The top of the alignment rod has a conical top. The inner base is provided with a first elastic element for resetting the alignment rod. The outer base is provided with a second elastic element for resetting the lower riveting joint.

[0011] In some embodiments, the sealing gasket station includes a sealing gasket vibratory feeder, a sealing gasket conveying track, a sealing gasket robot, and a receiving driver located at the bottom of an alignment rod. The sealing gasket robot includes a first frame, a first transverse support mounted on the first frame, a first vertical support mounted on the first transverse support, and a stripping assembly mounted on the first vertical support. The stripping assembly includes a pin insertion rod, a stripping cylinder, and a stripping cylinder. The end of the sealing gasket conveying track is provided with a dispensing hole for inserting the pin insertion rod. The pin insertion rod passes through the through hole of the sealing gasket. The material release cylinder is fitted onto the insert rod and moves synchronously with the first vertical moving seat. It is driven to move vertically by the release cylinder. When the sealing gasket station is running, the receiving driver pushes the alignment rod to extend out of the second channel. The insert rod is inserted into the through hole of the sealing gasket. The sealing gasket is transferred to the upper part of the inner base and aligned with the alignment rod by the first horizontal moving seat. Then, the insert rod is driven to contact the alignment rod by the first vertical moving seat. The release cylinder drives the release cylinder to press down and transfer the sealing gasket to the second protrusion, and it is fitted onto the alignment rod.

[0012] In some embodiments, the outer cover station includes an outer cover robot arm that grasps the outer cover, moves it to alignment with the alignment rod, and fits the outer cover onto the alignment rod. The spring station includes a spring robot arm with the same structure as the sealing gasket robot arm, which fits the spring onto the alignment rod.

[0013] In some embodiments, the riveting station includes a riveting robot, which is used to grasp rivets and move them to the inner base to align with the alignment rod. The alignment rod is then pressed down by the rivets, so that the rivets pass through the through holes of the spring and the outer cover in sequence, and form an interference fit with the through hole of the sealing gasket. Then, the riveting robot grasps the rivets and transfers them together with the spring, the outer cover and the sealing gasket to the bottom cover of the outer base to complete the pre-assembly.

[0014] In some embodiments, the testing station includes a testing robot and two airtightness testing devices disposed on both sides of the testing robot. The testing robot includes two mechanical claws respectively corresponding to the two airtightness testing devices. A discharge channel is provided between the two airtightness testing devices. Each airtightness testing device includes a fixed frame, a movable plate, a drive cylinder, and an airtightness testing machine. Track grooves are provided on both side plates of the fixed frame. Two linkage wheels are provided on both sides of the movable plate. The track groove includes a translation section and an arc-shaped section that is obliquely upward toward the discharge channel. A testing seat is provided on the movable plate. Driven by the drive cylinder and in cooperation with the linkage wheels and track grooves, the movable plate can move the testing seat horizontally to a testing position below the airtightness testing machine and move it above the discharge channel and flip it so that the valve core assembly falls to the discharge position of the discharge channel. At the testing position, the airtightness of the valve core assembly is tested by inflating the air hole through the cooperation of the airtightness testing machine and the testing seat. A warning is issued for valve core assemblies with unqualified airtightness, and valve core assemblies with qualified airtightness are discharged.

[0015] The beneficial effects of the present invention are as follows: In the present invention, the valve core assembly forms a seal with the sealing gasket through the upper annular ridge, and the force is concentrated and uniform, which effectively solves the problem of poor sealing caused by planar contact; the upper annular ridge reduces the contact area between the sealing gasket and the outer cover, and the cavity design reduces the risk of adhesion after long-term closure, ensuring stable valve core opening force. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0017] Figure 1 This is a schematic diagram of an exhaust valve core assembly according to the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of an exhaust valve core assembly according to the present invention. Figure 2 ;

[0019] Figure 3 This is a cross-sectional view of an exhaust valve core assembly according to the present invention;

[0020] Figure 4 This is a schematic diagram of an assembly device for an exhaust valve core assembly according to the present invention;

[0021] Figure 5 This is a partial schematic diagram of the bottom cover workstation in this invention;

[0022] Figure 6 This is a partial schematic diagram of the sealing gasket station in this invention;

[0023] Figure 7 This is a partial schematic diagram of the outer cover workstation in this invention;

[0024] Figure 8 This is a partial schematic diagram of the spring workstation in this invention;

[0025] Figure 9 This is a partial schematic diagram of the riveting station in this invention;

[0026] Figure 10 This is a partial cross-sectional view of the sealing gasket station in this invention;

[0027] Figure 11 This is a partial cross-sectional view of the riveting station in this invention;

[0028] Figure 12 This is a partial schematic diagram of the testing station in this invention;

[0029] Figure 13 This is a partial schematic diagram of the testing station in this invention. Figure 1 ;

[0030] Figure 14 This is a partial schematic diagram of the testing station in this invention. Figure 2 . Detailed Implementation

[0031] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0033] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0034] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0035] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the above terms in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0038] Existing exhaust valves have problems such as poor sealing, easy adhesion of sealing gaskets leading to abnormal opening force, and poor exhaust.

[0039] Based on the above issues, such as Figures 1 to 14As shown, this application provides an exhaust valve core assembly, including a bottom cover 1, an outer cover 2, a sealing gasket 3, a spring 4, and rivets 5. The back of the outer cover 2 is recessed to form a groove 200, and the bottom cover 1 is adapted to be installed in the groove 200. A positioning groove 100 is provided on its back for precise positioning during assembly. The sealing gasket 3 is abutted between the bottom cover 1 and the outer cover 2. The outer cover 2 has an air hole 201. The bottom cover 1, the outer cover 2, and the sealing gasket 3 all have through holes coaxially formed at their centers. The rivets 5 pass through the through holes of the outer cover 2, the sealing gasket 3, and the bottom cover 1 in sequence to form a riveting connection, fixing the various parts into one piece.

[0040] The spring 4 is sleeved on the rivet 5 and abuts between the head of the rivet 5 and the front of the outer cover 2. Under the pre-tightening force of the spring 4, the sealing gasket 3 tightly fits the outer cover 2, thereby sealing the air hole 201. The outer cover 2 has a recessed portion 202 on its front side. An upper annular ridge 203 is formed on the side of the recessed portion 202 facing the sealing gasket 3. The upper annular ridge 203 abuts against the sealing gasket 3 to form a line contact seal. A cavity 204 is formed between the inner side of the upper annular ridge 203 and the sealing gasket 3. An air hole 201 is located on the inner side of the upper annular ridge 203 and communicates with the cavity 204. Compared to existing planar seals, the line contact makes the pressure more concentrated and uniform, effectively solving the problem of poor sealing caused by uneven force. Simultaneously, the line contact significantly reduces the contact area between the sealing gasket 3 and the outer cover 2. The cavity 204 facilitates valve core opening, especially after prolonged sealing, preventing the sealing gasket 3 from sticking to the outer cover 2, ensuring stable valve core opening force, and avoiding malfunctions caused by adhesion. This is particularly important in some special application scenarios.

[0041] The rivet 5 includes a head 500, a first rod 501, and a second rod 502 arranged sequentially. The end of the second rod 502 has a rivet hole 503. During riveting, the end of the second rod 502 is expanded by pressing the rivet hole 503, thereby fastening the parts. A step 504 is formed at the junction of the first rod 501 and the second rod 502. The edge of the through hole of the bottom cover 1 abuts against the step 504, which plays an axial positioning role and prevents the bottom cover 1 from excessive displacement.

[0042] Furthermore, the clearance fit between the first rod portion 501 and the through hole of the outer cover 2 facilitates the passage of the rivet 5. This design reduces the precision requirements of automated assembly equipment. The interference fit between the first rod portion 501 and the through hole of the sealing gasket 3 ensures the sealing performance at the connection between the rivet 5 and the sealing gasket 3, preventing gas leakage from this part.

[0043] In some embodiments, the bottom cover 1 is provided with a lower annular ridge 101 on the side facing the sealing gasket 3. The lower annular ridge 101 cooperates with the upper annular ridge 203 to press against the sealing gasket 3 in both directions, further improving the sealing reliability and preventing gas leakage.

[0044] In some embodiments, the spring 4 is a conical compression spring, with its large-diameter end abutting against the outer cover 2 and its small-diameter end abutting against the head 500 of the rivet. The conical structure makes the elastic force distribution of the spring 4 more uniform. Compared with ordinary cylindrical springs, it can better adapt to the force-bearing surfaces of the outer cover 2 and the rivet head 500, ensuring that the sealing gasket 3 is subjected to continuous and stable compression force, which not only ensures the sealing effect, but also avoids the risk of adhesion caused by excessive local compression of the sealing gasket 3 due to uneven elastic force.

[0045] In some embodiments, the parts where the upper annular ridge 203 abuts against the lower annular ridge 101 and the sealing gasket 3 are all configured as arc-shaped contact surfaces 102, which can prevent sharp edges from scratching the sealing gasket 3, while increasing the compatibility of the fit, dispersing local pressure, extending the service life of the sealing gasket 3, and further reducing the probability of adhesion between the sealing gasket 3 and the ridge.

[0046] In some embodiments, a flow channel 300 is provided between the sealing gasket 3 and the outer wall of the bottom cover 1 and the inner wall of the groove portion 200. An inclined conical surface 205 is provided on the outer side of the upper annular ridge 203, and an arc-shaped surface 206 is connected to the end of the inclined conical surface 205, which smoothly transitions to the flow channel 300. This configuration reduces gas flow resistance and prevents gas from accumulating around the sealing gasket 3, completely solving the problem of poor exhaust path in existing structures and improving exhaust efficiency.

[0047] This application also provides an assembly device for assembling the valve core assembly, including a turntable 6, a drive mechanism, and a bottom cover station 71, a sealing gasket station 72, an outer cover station 73, a spring station 74, a rivet station 75, a riveting station 76, and a testing station 77 arranged sequentially along the circumference of the turntable 6. The turntable 6 is evenly provided with a plurality of outer bases 8 in the circumference, and an inner base 9 is correspondingly provided on the inner side of the outer base 8. The drive mechanism drives the turntable 6 to rotate intermittently, so that the outer base 8 and the inner base 9 pass through each station in sequence to achieve automated assembly.

[0048] The bottom cover station 71 includes a bottom cover vibratory feeder 710, a bottom cover conveying track 711, and a bottom cover robot 712, which is used to load the bottom cover 1 to the outer base 8; the sealing gasket station 72 includes a sealing gasket vibratory feeder 720, a sealing gasket conveying track 721, and a sealing gasket robot 722, which is used to load the sealing gasket 3 to the inner base 9; the outer cover station 73 includes an outer cover vibratory feeder 730, an outer cover conveying track 731, and an outer cover robot 732, which is used to load the outer cover 2 to the inner base 9; the spring station 74 includes a spring vibratory feeder 740, a spring... The spring conveying track 741 and the spring robot 742 are used to load the spring 4 to the inner base 9; the riveting station 75 includes a rivet vibratory plate, a rivet conveying track and a rivet robot 750, which is used to load the rivet 5 to the inner base 9 and to grab and move the sealing gasket 3, the outer cover 2, the spring 4 and the rivet 5 to the bottom cover 1 of the outer base 8; the riveting station 76 is used to rivet the bottom cover 1, the sealing gasket 3, the outer cover 2, the spring 4 and the rivet 5 on the outer base 8; the testing station 77 is used to pressurize the air hole 201 to test the air tightness of the valve core assembly.

[0049] Each workstation adopts an automated feeding structure consisting of a vibratory feeder, a conveyor track, and a robotic arm: the bottom cover vibratory feeder 710 arranges the bottom covers 1 in an orderly manner and conveys them through the bottom cover conveyor track 711; the bottom cover robotic arm 712 grabs the bottom covers 1 and feeds them to the outer base 8; the sealing gasket 3, the outer cover 2, and the spring 4 are respectively conveyed to the inner base 9 through the corresponding vibratory feeder, conveyor track, and robotic arm; after the rivet robotic arm 750 feeds the rivet 5 to the inner base 9, it grabs the sealing gasket 3, the outer cover 2, the spring 4, and the rivet 5 on the inner base 9 and moves them to the bottom cover 1 of the outer base 8 to complete the pre-assembly of the parts. The rivet vibratory feeder and rivet conveying track can also be replaced by a rivet sorting machine 751. The vibratory feeder can realize the automatic sorting and conveying of parts. The conveying track generally adopts a straight vibration conveying track. Each robot arm has multi-axis movement function, with at least lateral and vertical movement functions. It can also be configured with rotation function as needed. The gripping part of the robot arm can be set as a clamping block type or a magnetic suction rod type, etc. These devices are automated feeding structures well known to those skilled in the art, and will not be described in detail here.

[0050] Specifically, the outer base 8 is provided with a first boss 800 that is adapted to the positioning groove 100 of the bottom cover 1. The precise positioning of the bottom cover 1 is achieved through the cooperation between the positioning groove 100 and the first boss 800. The first boss 800 is provided with a first channel 801 corresponding to the through hole of the bottom cover 1. A lower riveting joint 802 is provided in the first channel 801, and the lower riveting joint 802 is adapted to the riveting hole. The inner base 9 is provided with a second boss 900 that matches the groove 200 of the outer cover 2. The second boss 900 is provided with a second channel 901 for inserting rivets 5. An alignment rod 902 is provided in the second channel 901. A conical top 904 is provided on the top of the alignment rod 902. The inner base 9 is provided with a first elastic element 903. A movable rod 905 is provided at the lower part of the second channel 901. The first elastic element 903 abuts between the alignment rod 902 and the movable rod 905. The first elastic element 903 is used to allow the upper end of the alignment rod 902 to extend out of the second channel 901 and to reset after being pressed down. Specifically, both the alignment rod 902 and the movable rod 905 are provided with a convex part. The first elastic element 903 abuts between the two convex parts. The two convex parts can also prevent the corresponding rod from disengaging from the inner base 9.

[0051] The riveting station 76 includes an upper riveting machine and a lower riveting machine respectively disposed above and below the outer base 8. The upper riveting machine includes an upper driver 760 and an upper riveting joint 761, and the lower riveting machine includes a lower driver 762 and an adjusting rod 763, with the adjusting rod 763 located below the lower riveting joint 802. A cam 803 is provided at the lower part of the lower riveting joint 802, on which a second elastic element 804 is sleeved and abuts against the cam 803 and the outer base 8. The driver can be electric, pneumatic, or hydraulic.

[0052] When the riveting station 76 is running, the lower driver 762 drives the adjusting rod 763 to push the lower riveting joint 802 to the designated position. The upper riveting joint 761 presses down on the head of the rivet 5, causing the lower riveting joint 802 to squeeze the rivet hole 503 of the rivet 5. This causes the end of the second rod 502 to expand, achieving the fastening and riveting of each part. Afterward, the adjusting rod 763 retracts, and under the action of the second elastic element, the lower riveting joint 802 returns to its original position. With this setting, the adjusting rod 763 not only ensures that the riveting length of the rivet 5 is consistent each time, but can also be adjusted as needed, improving the adaptability and flexibility of the equipment. In addition, the lower riveting joint 802 can be pushed up to lift the assembled valve core assembly for the corresponding robotic arm to grasp, without affecting the normal rotation of the turntable 6.

[0053] The sealing gasket station 72 also includes a receiving driver 723 located at the bottom of the alignment rod 902. The sealing gasket robot 722 includes a first frame 7220, a first horizontal moving seat 7221 disposed on the first frame 7220, a first vertical moving seat 7222 disposed on the first horizontal moving seat 7221, and a stripping assembly disposed on the first vertical moving seat 7222. The stripping assembly includes a pin insertion rod 7223, a stripping cylinder 7224, and a stripping cylinder 7225. The end of the sealing gasket conveying track 721 is provided with a dispensing hole for the pin insertion rod 7223 to be inserted. The pin insertion rod 7223 is interference-fitted with the through hole of the sealing gasket and moves synchronously with the first vertical moving seat 7222. The stripping cylinder 7223... 25 is mounted on the insert rod 7223, which is driven to move vertically by the release cylinder 7224. When the sealing gasket station 72 is running, the insert rod 7223 is inserted into the through hole of the sealing gasket to form a tight fit. The sealing gasket is transferred to the inner base 9 above and aligned with the alignment rod 902 by the first horizontal moving seat 7221. Then, the insert rod 7223 is driven to contact the alignment rod 902 by the first vertical moving seat 7222. The release cylinder 7224 drives the release cylinder 7225 to press down, transferring the sealing gasket to the second boss 900 and mounting it on the alignment rod 902. During this process, the receiving driver 723 can move up to hold the lower end of the movable rod 905 to ensure that the sealing gasket is smoothly mounted on the alignment rod 902. This setup solves the problems of damage to the sealing gasket and high difficulty in alignment and assembly caused by traditional clamping manipulators. The main sealing gasket is prone to deformation of its central through hole after being clamped, especially during the process of fitting the alignment rod 902.

[0054] The outer cover robot 732 grasps the outer cover and moves it to be aligned with the alignment rod 902, and then puts the outer cover into the alignment rod 902. It only needs to use a common clamping robot. The spring robot 742 has the same structure as the sealing gasket robot 722, and it puts the spring into the alignment rod 902.

[0055] The rivet robot 750 is used to grasp the rivet and move it above the inner base 9 to align with the alignment rod 902. Then, the rivet presses down the alignment rod 902, so that the rivet passes through the through holes of the spring and the outer cover in sequence, and forms an interference fit with the through hole of the sealing gasket. During this process, the conical top 904 of the alignment rod 902 can be inserted into the through hole of the rivet 5, guiding the rivet 5 to accurately pass through the through holes of each part. Then, the rivet robot 750 grasps the rivet and transfers it together with the spring, the outer cover and the sealing gasket to the bottom cover of the outer base 8 to complete the pre-assembly.

[0056] Conventional automated assembly equipment typically uses only one base for positioning during assembly. However, this presents several problems for the aforementioned valve core assembly: First, since riveting needs to be performed on the base, effective axial positioning of the parts is impossible, especially for rivet 5, which needs to pass through various through holes. Second, during assembly, rivet 5 needs to be pressed down through the through hole of the sealing gasket 3; since the two are interference fits, a certain amount of force is required. If the bottom cover 1 is placed underneath at this time, it is easily damaged. In this equipment, an external base is innovatively adopted. The design of the inner base 8 and the inner base 9 is separate, which solves the problem that it is difficult to achieve precise axial positioning and avoid damage to parts by a single base. Specifically, the inner base 9 positions the outer cover 2 and other parts through the second boss 900. The conical top 904 of the aligning rod 902 can be inserted into the through hole of the rivet 5, guiding the rivet 5 to pass through the through hole of each part accurately, ensuring accurate axial positioning. The interference fit between the rivet 5 and the sealing gasket 3 requires the application of downward pressure. The inner base 9 bears this pressure, while the bottom cover 1 is positioned on the outer base 8 to prevent the bottom cover 1 from being damaged by pressure.

[0057] The inspection station 77 includes an inspection robot 770 and two airtightness inspection devices 771 disposed on both sides of the inspection robot 770. The inspection robot 770 includes two mechanical grippers respectively positioned for the two airtightness inspection devices 771. The two mechanical grippers prevent the valve core assembly from being missed during inspection and are perfectly matched to the assembly speed of the valve core assembly. A discharge channel 7700 is provided between the two airtightness inspection devices 771 for collecting qualified products.

[0058] The airtightness testing device 771 includes a fixed frame 772, a movable plate 773, a drive cylinder 774, and an airtightness testing machine 775. The fixed frame 772 has track grooves 776 on both side plates. The movable plate 773 has two linkage wheels 777 on both sides. The track groove 776 includes a translation section 7761 and an arc-shaped section 7762 that is obliquely upward toward the discharge channel 7700. The movable plate 773 is provided with a testing seat 7730. Driven by the drive cylinder 774, the linkage wheel 777 moves along the track groove 776, giving the movable plate 773 two working positions: First, the detection position, where the movable plate 773 moves horizontally to below the air tightness tester 775, which cooperates with the test seat 7730 to inflate the air hole 201 of the valve core assembly to test the air tightness, and will issue a warning for unqualified products; Second, the discharge position, where the movable plate 773 moves to above the discharge channel 7700 and flips along the arc section 7762, causing qualified valve core assemblies to fall into the discharge channel 7700, completing the automatic sorting.

[0059] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0060] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0061] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. An assembly device for an exhaust valve core assembly, characterized in that, The exhaust valve core assembly includes a bottom cover, an outer cover, a sealing gasket, a spring, and rivets. The back of the outer cover has a groove, and the bottom cover is disposed within the groove with a positioning groove on its back. The sealing gasket is abutted between the bottom cover and the outer cover. The bottom cover, the outer cover, and the sealing gasket all have through holes coaxially arranged at their centers. The rivets pass through the through holes of the outer cover, the sealing gasket, and the bottom cover in sequence to form a riveting connection. The spring is sleeved on the rivets and abuts between the rivet head and the front of the outer cover. The front of the outer cover has an air hole. Under the action of the spring, the sealing gasket closes the air hole. The front of the outer cover has a recessed portion, and the side of the recessed portion facing the sealing gasket forms an upper annular ridge. The upper annular ridge abuts against the sealing gasket to form a seal. A cavity is formed between the inner side of the upper annular ridge and the sealing gasket. The air hole is opened on the inner side of the upper annular ridge and communicates with the cavity. The assembly equipment includes a turntable, a drive mechanism, a bottom cover station, a sealing gasket station, an outer cover station, a spring station, a rivet station, a riveting station, and a testing station. The turntable has several outer bases circumferentially arranged, and an inner base is located inside each outer base. The drive mechanism drives the turntable to rotate, causing the outer and inner bases to pass through each station. The bottom cover station is used to load the bottom cover onto the outer base; the sealing gasket station is used to load the sealing gasket onto the inner base; the outer cover station is used to load the outer cover onto the inner base; the spring station is used to load the spring onto the inner base; the rivet station is used to load the rivet onto the inner base and to pick up and move the sealing gasket, outer cover, spring, and rivet onto the bottom cover of the outer base; the riveting station is used to rivet the bottom cover, sealing gasket, outer cover, spring, and rivet onto the outer base; and the testing station is used to pressurize the vent to test the airtightness of the valve core assembly.

2. The assembly equipment for an exhaust valve core assembly according to claim 1, characterized in that, The bottom cover has a lower annular ridge on the side facing the sealing gasket. The lower annular ridge abuts against the sealing gasket to form a seal. The part where the upper annular ridge abuts against the lower annular ridge and the sealing gasket is set as an arc-shaped surface.

3. The assembly equipment for an exhaust valve core assembly according to claim 1, characterized in that, The rivet includes a head, a first rod, and a second rod arranged in sequence. A rivet hole is opened at the end of the second rod. A step is formed at the junction of the first rod and the second rod. The edge of the through hole of the bottom cover abuts against the step. The first rod is clearance-fitted with the through hole of the outer cover and interference-fitted with the through hole of the sealing gasket.

4. The assembly equipment for an exhaust valve core assembly according to claim 1, characterized in that, A flow channel is provided between the sealing gasket and the outer wall of the bottom cover and the inner wall of the groove. An oblique conical surface is provided on the outer side of the upper annular ridge, and an arc-shaped surface is connected to the end of the oblique conical surface, which is connected to the flow channel.

5. The assembly equipment for an exhaust valve core assembly according to claim 1, characterized in that, The outer base is provided with a first protrusion that matches the positioning groove of the bottom cover. A first channel is provided on the first protrusion corresponding to the through hole of the bottom cover. A lower riveting joint is provided in the first channel. The riveting station includes an upper riveting machine and a lower riveting machine respectively located above and below the outer base. The upper riveting machine includes an upper driver and an upper riveting joint. The lower riveting machine includes a lower driver and an adjusting rod. The adjusting rod is located below the lower riveting joint. The inner base is provided with a second protrusion that matches the groove of the outer cover. A second channel for rivet insertion is provided on the second protrusion. An alignment rod is provided in the second channel. The top of the alignment rod is provided with a conical top. The inner base is provided with a first elastic element for resetting the alignment rod. The outer base is provided with a second elastic element for resetting the lower riveting joint.

6. The assembly equipment for an exhaust valve core assembly according to claim 1, characterized in that, The sealing gasket station includes a sealing gasket vibratory feeder, a sealing gasket conveying track, a sealing gasket robot, and a receiving driver located at the bottom of the alignment rod. The sealing gasket robot includes a first frame, a first transverse shift seat mounted on the first frame, a first vertical shift seat mounted on the first transverse shift seat, and a stripping assembly mounted on the first vertical shift seat. The stripping assembly includes a pin insertion rod, a stripping cylinder, and a stripping cylinder. The end of the sealing gasket conveying track is provided with a distribution hole for the pin insertion rod to be inserted. The pin insertion rod is interference-fitted with the through hole of the sealing gasket. And move synchronously with the first vertical moving seat. The unloading cylinder is sleeved on the insertion rod. It is driven to move vertically by the unloading cylinder. When the sealing gasket station is running, the receiving driver pushes the alignment rod to extend out of the second channel. The insertion rod is inserted into the through hole of the sealing gasket. The sealing gasket is transferred to the upper part of the inner base and aligned with the alignment rod by the first horizontal moving seat. Then, the insertion rod is driven to contact the alignment rod by the first vertical moving seat. The unloading cylinder drives the unloading cylinder to press down and transfer the sealing gasket to the second protrusion and sleeve it on the alignment rod.

7. The assembly equipment for an exhaust valve core assembly according to claim 6, characterized in that, The outer cover station includes an outer cover robot arm, which grasps the outer cover and moves it to be aligned with the alignment rod, and then puts the outer cover into the alignment rod. The spring station includes a spring robot arm, which has the same structure as the sealing gasket robot arm, and puts the spring into the alignment rod.

8. The assembly equipment for an exhaust valve core assembly according to claim 7, characterized in that, The riveting station includes a riveting robot, which is used to grab rivets and move them to the inner base to align with the alignment rod. The alignment rod is then pressed down by the rivets, so that the rivets pass through the through holes of the spring and the outer cover in sequence, and form an interference fit with the through hole of the sealing gasket. Then, the riveting robot grabs the rivets and transfers them together with the spring, the outer cover and the sealing gasket to the bottom cover of the outer base to complete the pre-assembly.

9. The assembly equipment for an exhaust valve core assembly according to claim 1, characterized in that, The testing station includes a testing robot and two airtightness testing devices positioned on either side of the testing robot. The testing robot includes two mechanical claws corresponding to the two airtightness testing devices. A discharge channel is provided between the two airtightness testing devices. Each airtightness testing device includes a fixed frame, a movable plate, a drive cylinder, and an airtightness testing machine. Track grooves are provided on both side plates of the fixed frame. Two linkage wheels are provided on each side of the movable plate. The track groove includes a translation section and an arc-shaped section angled upwards towards the discharge channel. A testing seat is provided on the movable plate. Driven by the drive cylinder and in cooperation with the linkage wheels and track grooves, the movable plate can horizontally move the testing seat to a testing position below the airtightness testing machine and then move it above the discharge channel and flip it over, causing the valve core assembly to fall into the discharge position of the discharge channel. At the testing position, the airtightness of the valve core assembly is tested by inflating the air vents through the airtightness testing machine and testing seat. A warning is issued for valve core assemblies with unqualified airtightness, and valve core assemblies with qualified airtightness are discharged.

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