Membrane gas meter assembly production line

Abstract

The present invention discloses an assembled meter production line for diaphragm gas meters, which is characterized by comprising: an annular support surface; an annular guide rail, the annular rectangular support plane is fixedly installed with the annular guide rail symmetrically about the horizontal center line and the vertical center line; a conveying drive motor; an assembly station, the assembly station includes an upper cover feeding station, an outer magnet assembly station, an upper cover gluing station, a movement unit assembly station, a lower cover sealing ring assembly station and a discharging station which are arranged in sequence from front to back along the circumferential direction of the annular guide rail and are evenly spaced; a loading seat, a plurality of loading seats for reversely loading the upper cover are fixedly installed on the annular guide rail at equal intervals and are matched with the number of assembly stations, each loading seat is slidably installed on the annular guide rail through a slider, and each slider is fixedly connected with the annular drive chain through a connecting piece. The advantages of the present invention are: higher efficiency in use and more reliable conveying and positioning.

Description

Technical Field

[0001] The present invention belongs to the field of assembled diaphragm gas meters, and particularly relates to an assembly production line for assembled diaphragm gas meters. Background Art

[0002] A diaphragm gas meter is a volumetric metering instrument used to measure the consumption of gas. The working principle of a diaphragm gas meter is as follows:

[0003] The method of using two flexible diaphragm metering chambers is adopted to measure the gas volume flow rate - under the action of a pressure difference, the gas alternately enters the two metering chambers of the movement through a distribution valve, is discharged to the gas outlet after being filled, and at the same time, the flexible diaphragms in each metering chamber are pushed to make reciprocating movements. The inflation and exhaust cycle process is converted into the corresponding gas volume flow rate through a conversion mechanism, and then transmitted to a counter through a transmission mechanism to complete the gas cumulative metering function.

[0004] A diaphragm gas meter mainly consists of components such as a housing (including an upper cover, a lower cover, and a sealing ring for pressing and connecting the upper cover and the lower cover), a movement, and a counter. Among them, the structure of the movement itself is relatively compact and complex, so it is usually assembled using a separate production line (for example, the "Automated Production Line for Diaphragm Gas Meter Movements" disclosed in Application No. 202111381250.0).

[0005] The assembly of an assembled diaphragm gas meter refers to installing the assembled movement (also called the "movement body assembly") into the upper cover and the lower cover and realizing the press sealing through the sealing ring between the upper and lower covers.

[0006] Currently, the prior art has disclosed an assembly production line for assembled diaphragm gas meters. For example, in the existing literature "Design and Implementation of the Assembly Production Line for Assembled Gas Meters" (Xu Peng et al. "Design and Implementation of the Assembly Production Line for Assembled Gas Meters." Mechanical Engineering & Automation 6 (2017): 3. Mechanical Engineering & Automation, December 2017: pp. 185 - 186).

[0007] However, the guide rail conveying mechanism in the existing assembly production line for assembled diaphragm gas meters has a straight - bar layout. The disadvantages of this are as follows: The loading seats on the guide rail conveying mechanism with a straight - bar layout mainly have the following two structures:

[0008] First, each loading seat on the guide rail conveying mechanism is placed at the upstream and taken off at the downstream; then it is separately conveyed from the downstream to the upstream and re - placed; this makes the use of the loading seat rather cumbersome and inefficient.

[0009] Second, the guide rail conveying mechanism adopts a rotary belt conveying structure, and a plurality of loading seats are fixedly installed at intervals on the rotary belt, and the number of the loading seats is twice that of the assembly stations; however, the loading seats on the lower side of the rotary belt are always in an idle state, which not only wastes manufacturing materials, but also easily causes the belt to deform due to the gravity of the loading seats, thereby affecting the assembly and conveying accuracy.

[0010] Based on this, the applicant considered designing a diaphragm gas meter assembly production line with higher efficiency and more reliable conveying and positioning. Summary of the Invention

[0011] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a diaphragm gas meter assembly production line with higher efficiency and more reliable conveying and positioning.

[0012] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0013] A diaphragm gas meter assembly production line, characterized by comprising:

[0014] An annular bracket, the top of the annular bracket has an annular rectangular supporting plane with the same circular arc chamfers at all four top corners;

[0015] An annular guide rail, the annular rectangular supporting plane is fixedly installed with the annular guide rail symmetrically about the horizontal center line and the vertical center line;

[0016] A conveying drive motor, a conveying drive motor is fixedly installed at each inner corner of the annular bracket, the output shaft of each conveying drive motor is vertically upward and the axis thereof coincides with the center of the circle at the inner corner where it is located, and a drive wheel is fixedly sleeved on the output shaft; a tensioned annular drive chain is commonly engaged and connected to the drive wheels of the conveying drive motors;

[0017] An assembly station, the assembly station includes an upper cover feeding station, an outer magnet assembly station, an upper cover gluing station, a movement unit assembly station, a lower cover sealing ring assembly station and a discharging station which are arranged in sequence along the circumferential direction of the annular guide rail and are evenly spaced;

[0018] Loading seats, a plurality of loading seats for reversely loading the upper cover are fixedly installed at equal intervals on the annular guide rail, each loading seat is slidably installed on the annular guide rail through a slider, and each slider is fixedly connected to the annular drive chain through a connecting member.

[0019] Compared with the prior art, the advantages of the diaphragm gas meter assembly production line in this solution are:

[0020] 1. The entire assembled meter production line of the diaphragm gas meter is arranged in a circular layout. The circular layout occupies less floor space, can be more flexibly arranged according to the characteristics of the site, and has better practicability.

[0021] 2. For the assembled meter production line of the diaphragm gas meter with a circular layout, the feeding of the upper cover, outer magnetic steel, movement group, lower cover, and sealing ring can also be arranged in a circular layout, making full use of the space outside the circular bracket and improving the space utilization rate. At the same time, it is also convenient for the production workshop to carry out centralized feeding through an automated conveyor line, reducing production costs.

[0022] 3. The number of loading seats matches the number of assembly stations, and the loading seats are always installed on the circular guide rail to circulate and are in an effectively utilized state throughout the assembly process. While ensuring the production rhythm, the number of loading seats is set to be less, and the production line structure in this solution is more concise and reasonable. Brief Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram (in the top view direction) of the assembled meter production line of the diaphragm gas meter in this technical solution.

[0024] Figure 2 It is a three-dimensional structural diagram of the assembled meter production line of the diaphragm gas meter in this technical solution.

[0025] Figure 3 It is a three-dimensional structural diagram of the assembled meter production line of the diaphragm gas meter (with an NG product placement bracket).

[0026] Figure 4 It is a schematic structural diagram at the upper cover feeding station and the bushing lubrication station of the assembled meter production line of the diaphragm gas meter.

[0027] Figure 5 It is a schematic structural diagram at the outer magnetic steel assembly station of the assembled meter production line of the diaphragm gas meter in this technical solution.

[0028] Figure 6 It is a partial enlarged view of the outer magnetic steel assembly station.

[0029] Figure 7 It is a schematic structural diagram at the upper cover gluing station of the assembled meter production line of the diaphragm gas meter in this technical solution.

[0030] Figure 8 It is a schematic structural diagram at the movement group assembly station of the assembled meter production line of the diaphragm gas meter in this technical solution.

[0031] Figure 9 It is a schematic structural diagram at the lower cover sealing ring assembly station of the assembled meter production line of the diaphragm gas meter in this technical solution.

[0032] Figure 10Partial structural schematic diagram of the lower cover sealing ring assembly mechanism

[0033] Figure 11 Schematic diagram of the lower cover sealing ring assembly station in the assembled meter production line of the diaphragm gas meter in this technical solution

[0034] Figure 12 Schematic diagram of the sealing ring feeding mechanism in the assembled meter production line of the diaphragm gas meter in this technical solution

[0035] Figure 13 Schematic diagram of the sealing ring picking and placing structure in the assembled meter production line of the diaphragm gas meter in this technical solution

[0036] Figure 14 Schematic diagram of the sealing ring picking and placing structure in the assembled meter production line of the diaphragm gas meter in this technical solution. The markings in the figure are as follows:

[0037] Assembled diaphragm gas meter: G1 upper cover (G11 valve assembly), G2 lower cover (G21 housing sealing surface, G22 long protrusion, G23 short protrusion), G3 outer magnetic steel (G31 dial), G4 movement group, G5 sealing ring

[0038] Assembled meter production line of the diaphragm gas meter: L1 circular support, L2 circular guide rail, L3 conveying drive motor, L4 circular drive chain, assembly stations (a upper cover feeding station, b bushing lubrication station (b1 transverse movement drive cylinder, b2 pressing cylinder, b3 pressing block, b4 valve group rectifying pressing cylinder), c outer magnetic steel assembly station, d upper cover alignment station, e upper cover gluing station, f outer magnetic steel rectifying station, g movement group assembly station, h lower cover sealing ring assembly station, i sealing ring rectifying station, j unloading station), L5 loading seat, loading seat secondary positioning mechanism (L61 rotating rod, L62 bearing seat, L63 intermediate connecting block, L64 positioning drive cylinder, L65 positioning pin), L7 NG product placement bracket, L8 unloading robot

[0039] M outer magnetic steel assembly mechanism: outer magnetic steel transfer arm (M11 gantry support, M12 guide rail, M13 slider, M14 strip-shaped mounting plate, M15 lifting cylinder, M16 lead screw module assembly), M2 vacuum suction nozzle, M3 outer magnetic steel guide and output chute, M4 positioning block (M41 U-shaped receiving groove), M5 vibrating feeder, M6 rotating cylinder

[0040] N Lower Cover Sealing Ring Assembly Mechanism: Sealing Ring Flat Laying and Positioning Module (N11 Sealing Ring Support and Positioning Flat Plate, N12 180-degree Rotary Cylinder for Sealing Ring), Lower Cover Conveyor and Lifting Module (N21 Lower Cover Conveyor Line, N22 Lower Cover Lifting Cylinder, N3 Lower Cover Attitude Detection and Adjustment Unit (Lifting and Rotating Cylinder Assembly (N321 Lifting and Rotating Block))), Lower Cover Adsorption and Transfer Module (N41 Vacuum Suction Nozzle for Lower Cover, Lower Cover Adsorption and Transfer Arm (N421 Gantry Bracket for Lower Cover Sealing Ring Assembly, N422 Lifting Cylinder, N423 180-degree Rotary Cylinder for Lower Cover, N424 Support Flat Plate));

[0041] X Sealing Ring Feeding Mechanism: X1 Cantilever, X2 Cantilever Support Structure (X21 Controllable Turntable, X22 Turntable Bracket (X221 Rectangular Body Support Frame, X222 Vertical Support Rod, X223 Horizontal Reinforcing Connecting Rod, X224 Diagonal Reinforcing Support Rod, X225 Diagonal Mounting Rod)), X3 Through-beam Laser Sensor, X4 Cylinder for Motor Lifting, X5 Synchronous Belt Driving Motor;

[0042] Y Sealing Ring Transfer Structure: Y1 Industrial Six-axis Robot, Y2 Clamping Plate (Y21 Fixed Surface, Y22 Clamping Surface (Y221 Clamping Posts for Long Sides, Y222 Horizontally Movable Clamping Block, Y223 Horizontally Clamping Cylinder, Y224 Clamping Posts for Short Sides, Y225 Vertically Movable Clamping Block, Y226 Vertically Clamping Cylinder, Y227 Cylindrical Section, Y228 Cone-shaped Section)); Detailed Implementation Manner

[0043] The present invention will be further described in detail below with reference to the accompanying drawings.

[0044] During specific implementation: As Figures 1 to 3 shown,

[0045] I. Assembly Process of Completed Diaphragm Gas Meter

[0046] The assembly process of the completed diaphragm gas meter includes the following steps:

[0047] First, at least one assembly station on the assembly production line of the completed diaphragm gas meter is provided with an assembly quality detection sensor, which is used to detect whether the NG state occurs at this assembly station; and an NG product placement position is provided near the offline position of the assembly production line of the completed diaphragm gas meter;

[0048] Second, when the assembly quality detection sensor detects the NG state, the assembled parts on the loading seat at this assembly station are marked as NG products, and from this assembly station until the offline position: the guide rail conveying mechanism of the assembly production line of the completed diaphragm gas meter maintains the normal conveying rhythm to convey the loading seat carrying the NG products, and the loading seat carrying the NG products is no longer assembled with uncompleted parts at subsequent stations;

[0049] Finally, when the loading base carrying NG products is transported to the offline workstation: the offline robot of the diaphragm gas meter assembly production line transfers the NG products to the NG product placement position.

[0050] Compared with the prior art, the membrane gas meter assembly process in this scheme has the following advantages:

[0051] 1. Even if the NG state is detected by any assembly quality detection sensor, the guide rail conveying mechanism of the entire diaphragm gas meter assembly production line will not stop and will still maintain the normal conveying rhythm, which will not cause the entire diaphragm gas meter assembly production line to stop working and can effectively ensure production efficiency.

[0052] 2. NG products will no longer be assembled with unfinished parts by subsequent workstations from the assembly station where the NG status is detected until the offline position. This will keep the NG products in the initial NG status, making it convenient for subsequent workers to manually check the status of the NG products in the NG product placement position and put the parts that can be put online back online for gas meter assembly. In this way, the production rhythm of the membrane gas meter assembly production line will no longer be affected, and subsequent processing of NG products can also be convenient.

[0053] The NG product placement position includes an NG product placement bracket;

[0054] The NG product placement bracket is installed independently of the membrane gas meter assembly production line;

[0055] The NG product placement bracket is installed on the ground outside the downline position of the guide rail conveying mechanism of the membrane gas meter assembly production line;

[0056] The NG product placement bracket is provided with a placement plane for placing a plurality of NG products.

[0057] The structural setting of the above NG product placement bracket is independent of the installation of the diaphragm gas meter assembly production line; therefore, the installation of the existing diaphragm gas meter assembly production line can be expanded and modified more flexibly, which is more practical.

[0058] The NG product placement bracket includes a support frame, a driving wheel, a driven wheel and a transmission belt sleeved between the driving wheel and the driven wheel, which are arranged on the top of the support frame; the driving wheel is driven by a driving motor, and the driving motor is electrically connected to a motor controller.

[0059] The advantage of adopting the above structure is that the XYZ-axis coordinates of the starting position of the upper surface of the conveyor belt can be used as the placement coordinates for the offline robot to place the NG products on the conveyor belt. This makes it easy to simplify the control of the placement action of the offline robot, thereby improving the reliability of the offline robot in placing NG products.

[0060] Meanwhile, since the NG product placement bracket with the above structure is adopted, after the NG product is placed by the offline manipulator, the conveyor belt can move and vacate the above-mentioned "unique placement coordinate" again for the offline manipulator to place the NG product again.

[0061] During implementation, the drive control of the conveyor belt can preferably be achieved by the following two methods:

[0062] 1. The motor controller is signal-connected to the control system of the diaphragm gas meter assembly production line:

[0063] In this way, the movement of the conveyor belt can be controlled by timing: that is, in the order of time, the offline manipulator first places the NG product at the above-mentioned placement coordinate on the conveyor belt, and then the motor controller controls the conveyor belt to move.

[0064] 2. The motor controller is not connected to the control system of the diaphragm gas meter assembly production line:

[0065] In this case, a detection sensor can be set on the NG product placement bracket to detect whether the placement coordinate on the conveyor belt is empty. If it is not empty, it will move after a few seconds of delay after obtaining the detection signal (the few seconds are shorter than the duration required for a single beat of the diaphragm gas meter assembly production line).

[0066] The assembly stations where the assembly quality detection sensors are set are: one or more of the upper cover feeding station, outer magnetic steel assembly station, upper cover gluing station, movement assembly station, sealing ring assembly station, and lower cover assembly station.

[0067] By setting the assembly quality detection sensors at the single assembly station or multiple assembly stations as above, the assembly quality of each station can be detected, thereby better ensuring the assembly quality of the diaphragm gas meter assembly production line.

[0068] The assembly quality detection sensor is an optoelectronic sensor. The optoelectronic sensor is set at the station to be detected, and the detection head of the optoelectronic sensor faces the assembly parts to be inspected at the assembly station.

[0069] After setting the above optoelectronic sensor at the corresponding assembly station, the optoelectronic sensor can obtain two corresponding different detection signals in two states where the corresponding assembly parts are installed or not installed. Thus, it can be judged whether the assembly parts are installed through the two different detection signals and accordingly judge whether an NG state occurs.

[0070] During implementation, the optoelectronic sensor is preferably a laser optoelectronic sensor or a fiber optic sensor with stronger anti-interference ability. In this way, more reliable assembly quality detection signals can be obtained persistently.

[0071] II. Diaphragm Gas Meter Assembly Production Line

[0072] The assembled production line of diaphragm gas meters includes:

[0073] A circular bracket, the top of the circular bracket has a ring-shaped rectangular supporting plane with the same circular arc chamfers at all four top angles;

[0074] A circular guide rail, the ring-shaped rectangular supporting plane is fixedly installed with the circular guide rail symmetric about the horizontal center line and the vertical center line;

[0075] A conveying drive motor, a conveying drive motor is fixedly installed at each inner corner of the circular bracket, the output shaft of each conveying drive motor is vertically upward, the axis line coincides with the center of the circle at the inner corner where it is located, and a driving wheel is fixedly sleeved on the output shaft; a tensioned circular driving chain is commonly engaged and connected to the driving wheels of the conveying drive motors;

[0076] Assembly stations, the assembly stations include an upper cover feeding station, an outer magnet assembly station, an upper cover gluing station, a movement group assembly station, a lower cover sealing ring assembly station and a discharging station which are arranged in sequence from front to back along the circumferential direction of the circular guide rail and are evenly spaced;

[0077] Loading seats, a plurality of loading seats for reversely loading the upper covers are evenly spaced and fixedly installed on the circular guide rail, and the number of loading seats matches the number of assembly stations. Each loading seat is slidably installed on the circular guide rail through a slider, and each slider is fixedly connected to the circular driving chain through a connecting piece.

[0078] Compared with the prior art, the advantages of the assembled production line of diaphragm gas meters in this solution are:

[0079] 1. The entire assembled production line of diaphragm gas meters is in a circular layout. The circular layout occupies less floor area, can be more flexibly laid out according to the site characteristics, and has better practicability.

[0080] 2. For the assembled production line of diaphragm gas meters in a circular layout, the feeding of the upper cover, outer magnet, movement group, lower cover and sealing ring can also be in a circular layout, making full use of the space outside the circular bracket, improving the space utilization rate; at the same time, it is also convenient for the production workshop to conduct centralized feeding through an automated conveying line method, reducing the production cost.

[0081] 3. The number of loading seats matches the number of assembly stations, and the loading seats are always installed on the circular guide rail and circulate, and are in an effectively utilized state throughout the assembly process. While ensuring the production rhythm, the number of loading seats is set to be less, and the structure of the production line in this solution is more concise and reasonable.

[0082] During implementation, it is most preferred that the number of loading seats is 1 - 3 more than the number of assembly stations (the partial functional structures can be expanded according to the production of different types of products). The second preference is that the number of loading seats is the same as the number of assembly stations.

[0083] During specific implementation, an external magnetic steel assembly mechanism is adopted for the external magnetic steel assembly station; a movement mechanism assembly station is adopted for the movement mechanism assembly station;

[0084] Each assembly station is arranged on the straight section of the annular rectangular support plane.

[0085] The straight section of the annular rectangular support plane can better judge the displacement accuracy of the loading seat walking to this straight section, so as to better ensure the reliability of the smooth assembly of each assembly station on the premise of ensuring the walking accuracy of the loading seat.

[0086] The diaphragm gas meter forming assembly production line further includes a sliding support structure for slidingly supporting the annular drive chain; the sliding support structure includes U-shaped grooves fixedly installed on each straight section of the annular rectangular support plane, and the lower side, outer radial side and inner radial end face of the annular drive chain are in sliding contact connection with the groove bottom and the two opposite side faces of the U-shaped groove.

[0087] The above sliding support structure can slidingly support the annular drive chain, better avoid the deformation of the annular drive chain caused by its own gravity, and extend its service life.

[0088] During implementation, a lubricating medium (lubricating medium or grease) is coated between the contact surfaces of the U-shaped groove and the annular drive chain.

[0089] The annular rectangular support plane is a rectangular structure with two long sides and two short sides, and among all the assembly stations, the offline station is set on one of the two short sides, and a top cover gluing station is arranged on the other short side of the two short sides; the remaining stations are distributed on the two long sides in sequence.

[0090] After adopting the above layout, the top cover online station, external magnetic steel assembly station, movement mechanism assembly station, and bottom cover sealing ring assembly station that need to be loaded can be close to the outer positions of the four corners of the annular rectangular support plane, where there is a large layout space, which is convenient for the layout of various loading devices, making the layout of the production line more compact and reasonable.

[0091] The diaphragm gas meter forming assembly production line further includes a secondary positioning mechanism for the loading seat, and the secondary positioning mechanism for the loading seat is fixedly installed on each straight section of the annular support; each set of the secondary positioning mechanism for the loading seat includes a rotating rod, a bearing, a bearing seat, an intermediate connecting block, a positioning driving cylinder and a positioning clamping column;

[0092] Both ends of the rotating rod are rotatably mounted on the bearing seats through a bearing respectively, and the bearing seats are fixedly mounted on the radially outer side of the annular bracket; the intermediate connecting block is of a strip structure as a whole, and one end in the length direction is fixedly connected to the rotating rod, and the other end in the length direction is hinged to the outer end of the push rod of the positioning driving cylinder fixedly mounted on the annular bracket as a whole; a pair of the positioning columns are fixedly mounted at intervals on the outer surface of the rotating rod between the two bearing seats;

[0093] The slider of each loading seat is provided with a U-shaped positioning slot with an outer end chamfer on the radially outer side of the annular guide rail;

[0094] When each loading seat is correctly located at each assembly station, under the drive of the positioning driving cylinder, the intermediate connecting block is driven to rotate the rotating rod and enable a pair of positioning columns on the rotating rod to be aligned and inserted into the positioning slots of the adjacent pair of loading seats.

[0095] By adopting the above loading seat secondary positioning mechanism, at each beat point: the positioning driving cylinder drives the intermediate connecting block to act and rotates the rotating rod, and a pair of positioning columns just snap into the positioning slots of the adjacent pair of loading seats, so as to realize the accurate positioning of the loading seat during repeated cyclic movement, thereby effectively ensuring that each loading seat can be correctly located at the correct assembly station after each cyclic movement.

[0096] At the same time, when any loading seat is slightly misaligned, the above loading seat secondary positioning mechanism can drive the rotating rod to rotate by the action of the positioning driving cylinder, and enable a pair of positioning columns on the rotating rod to act on the positioning slot and be able to adjust the annular drive chain to move slightly (backward or forward) and make the loading seat re-located at the correct assembly station.

[0097] The upper cover gluing station includes a support frame fixedly installed inside the area surrounded by the annular bracket and a four-axis robotic arm fixedly installed on the support frame. The lower end of the electric telescopic rod at the outer end of the four-axis robotic arm constitutes the execution hand, and a glue gun is fixedly installed on the execution hand.

[0098] After adopting the above four-axis robotic arm in this solution, the accurate movement on the XYZ axes can be realized by using the four-axis robotic arm, so as to be better applicable to the gluing operations of membrane gas meter shells of various different models and improve the versatility of this production line.

[0099] (For example, Sinsung ST series or SRH10A series industrial robots or KUKA KR6 R500 Z200 model four-axis industrial robots)

[0100] The assembled production line of diaphragm gas meters further includes a bushing lubrication station, which is arranged between the upper cover feeding station and the outer magnetic steel assembly station;

[0101] The bushing lubrication station includes an installation bracket, and an upper cover pressing unit, a transverse movement unit and a lubricant coating unit fixedly installed on the gantry bracket;

[0102] The upper cover pressing unit has a vertically telescopic lower pressing part for pressing the upper cover from top to bottom;

[0103] The transverse movement unit has a transverse movement part, and the transverse movement part can drive the coating head of the lubricant coating unit to approach the inner bushing of the upper cover.

[0104] The setting of the above bushing lubrication station can effectively lubricate the bushing before the outer magnetic steel is assembled, better ensure the durable and reliable operation after the subsequent outer magnetic steel is installed, and better ensure the assembly quality of the assembled diaphragm gas meter.

[0105] The installation bracket is a gantry bracket and its top has a horizontal support frame located above the annular guide rail;

[0106] The transverse movement unit includes a transverse movement driving cylinder fixedly installed on the horizontal support frame, and the transverse movement driving cylinder is a linear slider type rodless cylinder;

[0107] The upper cover pressing unit is fixedly installed on the slider of the transverse movement driving cylinder. The upper cover pressing unit includes a downward pressing cylinder vertically fixed with its push rod facing downwards. A long strip-shaped pressing block is fixedly installed at the bottom of the downward pressing cylinder. The length direction of the pressing block is the same as the width direction of the upper cover and the length of the pressing block is greater than the width of the upper cover and the stroke of the slider of the transverse movement driving cylinder, so that the pressing block can always press the upper cover when sliding with the slider;

[0108] The lubricant coating unit is fixedly installed on the outer side surface of the downward pressing cylinder.

[0109] The advantages of the bushing lubrication station with the above structure are:

[0110] 1. After the production line is started, the transverse movement cylinder can pre-select the left and right working positions according to the company's MES production order information. After moving into place, the upper cover pressing unit acts according to the assembly position information, so that the upper cover can obtain stable positioning; and the lubricant coating unit can approach the bushing to contact and coat the lubricant when the upper cover pressing unit acts, so as to complete the lubrication of the bushing.

[0111] 2. The structures of the above installation bracket, transverse movement unit, upper cover pressing unit and lubricant coating unit are reasonable, and the actions are accurately and reliably realized, which can ensure the lubrication quality of the bushing.

[0112] The assembled production line of diaphragm gas meters further includes a valve component pressing module. The valve component pressing module includes a downward pressing cylinder for regularizing the valve group. The push rod of the downward pressing cylinder for regularizing the valve group is vertically downward and is integrally fixedly installed on the horizontal support frame;

[0113] A valve group pressing block for pressing the valve component is fixedly installed on the push rod of the downward pressing cylinder for regularizing the valve group.

[0114] After adopting the above valve component pressing module, the space of the bushing lubrication station can be utilized more fully, and the valve component in the upper cover of this station can be aligned through the valve component pressing module, and the valve component can be pressed and regularized to ensure the assembly quality of the valve component.

[0115] The assembled production line of diaphragm gas meters further includes an upper cover straightening station, which is arranged between the outer magnet assembly station and the upper cover gluing station;

[0116] The upper cover straightening station includes a mounting frame with the top above the annular guide rail and a downward pressing cylinder for straightening the upper cover. The push rod of the downward pressing cylinder for straightening the upper cover is vertically downward and is integrally fixedly installed on the top of the mounting frame;

[0117] A straightening pressing block is fixedly installed on the push rod of the downward pressing cylinder for straightening the upper cover. The length direction of the straightening pressing block is the same as the width direction of the upper cover and the length is greater than the width of the upper cover. The straightening pressing block is used to press the top opening end face of the upper cover loaded and installed in an inverted manner.

[0118] Because the outer magnet will contact the bushing during the process of assembling the outer magnet into the bushing of the upper cover, this contact may cause the upper cover of the loading seat to tilt slightly. The occurrence of this tilt may make it difficult to ensure the gluing quality (gluing position and thickness) of the upper cover group gluing station. Therefore, after the outer magnet assembly is completed, setting the above upper cover straightening station can straighten the upper cover to ensure that the glued upper cover has a consistent correct posture, thereby ensuring the gluing quality persistently and effectively.

[0119] During implementation, the assembled production line of diaphragm gas meters further includes an outer magnet regularizing station, which is arranged between the upper cover gluing station and the movement group assembly station;

[0120] The outer magnet regularizing station includes a gantry support, a linear slider type rodless cylinder, a lifting cylinder, and an outer magnet straightening rod;

[0121] The top of the gantry support has a horizontal support frame above the annular guide rail;

[0122] The sliding block movement direction of the linear sliding block type rodless cylinder is parallel to the length direction of the annular guide rail directly below; the lifting cylinder with the push rod facing downward is fixedly mounted on the sliding block of the linear sliding block type rodless cylinder;

[0123] The external magnetic steel straightening rod is fixedly mounted on the push rod of the lifting cylinder;

[0124] The lifting cylinder is used to drive the external magnetic steel straightening rod to extend into and out of the upper cover. When the external magnetic steel straightening rod extends into the upper cover, the linear slider type rodless cylinder can drive the external magnetic steel straightening rod to move laterally away from or closer to and press against the end face of the external magnetic steel that is away from the sleeve to achieve straightening.

[0125] In the present technical solution, an annular guide rail is adopted, and the four vertices of the annular guide rail are the same arc-shaped chamfers. Thus, when the loading seat passes through the vertices on the annular guide rail, for the diaphragm gas meter whose shaft sleeve in the upper cover carried on the loading seat is located radially inside the annular guide rail, the outer magnetic steel mounted on its shaft sleeve is easy to move slightly along the radial direction of the annular guide rail under the action of centrifugal force.

[0126] Therefore, after adopting the above-mentioned external magnetic steel regularization station in this technical solution, the external magnetic steel can be pushed back to the accurate assembly position by the external magnetic steel straightening rod, effectively ensuring the assembly quality.

[0127] About the specific implementation method of the movement assembly station

[0128] During implementation, the movement group assembly station includes a movement group conveyor belt, a movement group transfer robot, a movement group air outlet lubrication module and a movement group assembly robot.

[0129] The movement group conveyor belt is used to convey the movement group; the movement group transfer robot is used to convey the movement group on the movement group conveyor belt to the conveyor belt of the movement group air outlet lubrication module, and the conveyor belt is two conveyor belts arranged in parallel and spaced apart; at least two pairs of clamping blocks are arranged on the left and right outer sides of the two conveyor belts and along the length direction of the conveyor belts to clamp the movement group on the conveyor belts; at least two sets of lifting mechanisms are arranged in the gap between the two conveyor belts and in the length direction of the gap to lift the movement group upward; and at least two pairs of clamping blocks are arranged in the gap between the two conveyor belts and along the length direction of the gap to lift the movement group upward; and at least two pairs of clamping blocks are arranged in the gap between the two conveyor belts and in ... The movement group air outlet lubrication module is fixedly installed at the jacking mechanism located in the front in the forward and backward direction of the conveyor belt, and the movement group air outlet lubrication module includes a vertical lifting cylinder, a lubrication disc, a driving motor for rotating the lubrication disc, and an oil supply mechanism. The push rod of the vertical lifting cylinder drives the lubrication disc with the lubricating medium to align from top to bottom and contact with the movement group air outlet. At this time, the driving motor drives the lubrication disc to rotate so that the movement group air outlet is evenly coated with the lubricating medium, thereby realizing the lubrication of the movement group air outlet;

[0130] The robot for loading the movement group grips the movement group with a special jaw and conveys it into the upper cover on the loading seat at this station.

[0131] Specific implementation manner of the sealing ring rectifying station

[0132] During implementation, the assembled production line of the diaphragm gas meter also includes a sealing ring rectifying station, which is arranged between the lower cover sealing ring assembly station and the offline station;

[0133] The sealing ring rectifying station includes a cylinder for straightening, a support for straightening, a straightening ring and a straightening ring mounting plate;

[0134] The push rod of the cylinder for straightening faces downward and the cylinder is fixedly installed through the support for straightening;

[0135] The straightening ring mounting plate is fixedly installed on the push rod of the cylinder for straightening. The four sides between the straightening ring mounting plates are fixedly connected through connecting columns, and the distance between the straightening ring and the straightening ring mounting plate is greater than the height of the lower cover;

[0136] The whole straightening ring is in a runway-shaped structure. When the whole straightening ring is sleeved at the connection position between the lower cover and the upper cover: there is a gap between the innermost side surface of the straightening ring and the outer side surface of the lower cover;

[0137] The inner lower end surface of the straightening ring has an annular straightening groove for the radially outer edge of the sealing ring to fall into.

[0138] After adopting the above sealing ring rectifying station, after the lower cover packaging assembly is completed, the sealing ring can be further pressed down through the sealing ring rectifying station, effectively preventing the sealing ring from being skewed and better ensuring the assembly quality between the sealing ring and the lower cover.

[0139] III. Outer magnet assembly mechanism

[0140] The outer magnet assembly mechanism includes an outer magnet transfer arm and a vacuum suction nozzle;

[0141] The outer magnet transfer arm is fixedly installed above the annular guide rail of the assembled production line of the diaphragm gas meter through a support. The vacuum suction nozzle is installed on the execution hand part of the outer magnet transfer arm. The vacuum suction nozzle is used to adsorb a single outer magnet and sleeve it on the shaft sleeve of the upper cover under the drive of the outer magnet transfer arm;

[0142] It also includes a rotating module, which is integrally fixedly mounted on the execution hand of the external magnetic steel transfer arm, and the rotating module has a rotating part that can rotate in a vertical plane and achieve angular positioning of 0 degrees, -90 degrees and -180 degrees, and the vacuum suction nozzle is fixedly mounted on the rotating part; and the execution hand of the external magnetic steel transfer arm, the rotating module and its rotating part and the vacuum suction nozzle can jointly extend into the internal space of the upper cover of the diaphragm gas meter.

[0143] Compared with the prior art, the external magnetic steel assembly station in this solution has the following advantages:

[0144] 1. Only a rotating module is added to the existing mechanism, so the structure is relatively simple and the cost of transformation and implementation is low.

[0145] 2. The rotating part of the rotating module can drive the vacuum suction nozzle to absorb the external magnetic steel at -90 degrees (vertically downward), and to be coaxial with the shaft sleeve inside the upper cover of the diaphragm gas meter with positive or reverse air intake at 0 degrees or -180 degrees. Therefore, it can be used for the assembly needs of the external magnetic steel on the diaphragm gas meter with positive air intake (left inlet and right outlet) and reverse air intake (right inlet and left outlet), thereby reducing costs and increasing efficiency.

[0146] The rotating unit is a servo motor or a rotating cylinder.

[0147] Servo motors or rotary cylinders can achieve precise rotation control in the circumferential direction.

[0148] The servo motor may be a Kollmorgen AKM1 series synchronous servo motor.

[0149] The rotary cylinder can adopt a rotary swing cylinder of model CRB2BS20-180SZ produced by SMC Corporation of Japan.

[0150] The external magnetic steel transfer arm can be an industrial robot. The following structure can also be used:

[0151] The external magnetic steel transfer arm includes a gantry bracket, a guide rail, a slider, a strip mounting plate, a lifting cylinder and a lead screw module assembly;

[0152] The top of the gantry support has a horizontally arranged rectangular frame, and the rectangular frame spans the space above the annular guide rail arranged on the membrane gas meter assembly production line;

[0153] The guide rail and the lead screw module assembly are fixedly mounted on the upper surface of the two parallel sides of the rectangular frame perpendicular to the length direction of the annular guide rail directly below; the slider is slidably mounted on the guide rail, and the reciprocating nut on the lead screw module assembly is fixedly connected to the slider via the strip mounting plate;

[0154] The push rod of the lifting cylinder faces downward and is fixedly installed on the lower surface of the strip-shaped mounting plate. The push rod of the lifting cylinder constitutes the execution hand of the outer magnet moving arm.

[0155] The above structure of the outer magnet moving arm realizes the lateral movement through the guide rail and the lead screw module assembly, so that the vacuum suction nozzle can be laterally transferred from directly above the discharge port of the outer magnet to directly above the installation position required in the upper cover. The setting of the lifting cylinder can help to smoothly realize the vertical lifting and is used for alignment in the height direction during the suction and assembly of the outer magnet.

[0156] Compared with industrial robots, the above structure of the outer magnet moving arm has the advantages of lower cost and reliable operation.

[0157] The outer magnet assembly mechanism further includes an outer magnet assembly detection module. The outer magnet assembly detection module includes a photoelectric sensor. The photoelectric sensor is fixedly installed on the gantry bracket, and the probe of the photoelectric sensor is directly opposite to the radial outer side of the inner bushing of the upper cover of the loading seat at the outer magnet assembly station.

[0158] After adopting the above outer magnet assembly detection module (not shown in the drawings), different distance values can be detected by the photoelectric sensor before and after the outer magnet assembly, so as to reliably judge whether the outer magnet is assembled in place.

[0159] During implementation, the photoelectric sensor is preferably a laser photoelectric sensor with stronger anti-interference ability (such as the LR-X series small laser sensors produced by Keyence Corporation) or a fiber optic sensor. In this way, a more reliable assembly quality detection signal can be obtained persistently.

[0160] The outer magnet assembly mechanism further includes an outer magnet feeding module. The outer magnet feeding module includes a vibrating hopper, an outer magnet guiding and outputting groove, and a positioning block;

[0161] The input end of the outer magnet guiding and outputting groove is connected to the discharge port of the vibrating hopper. The output end of the outer magnet guiding and outputting groove is provided with a positioning block. The upper surface of the positioning block has a U-shaped receiving groove that can accommodate a single outer magnet. The open end of the U-shaped receiving groove is connected to the output end of the outer magnet guiding and outputting groove.

[0162] After adopting the above vibrating hopper, the outer magnets can be loaded in batches and fed to the outer magnet guiding and outputting groove one by one. The outer magnet guiding and outputting groove guides the outer magnets to the positioning block one by one, so that the vacuum suction nozzle can accurately suck a single outer magnet.

[0163] The outer magnet feeding module further includes an outer magnet lifting cylinder;

[0164] A perforation is provided at the bottom of the U-shaped receiving groove, and the perforation is concentric with the outer magnet;

[0165] The outer magnet lifting cylinder is fixed on the lower surface of the positioning block, and the push rod shaft of the lifting cylinder can withdraw from or penetrate through the perforation and insert into the shaft hole of the outer magnet; the outer magnet lifting cylinder is used to lift the outer magnet in the U-shaped material receiving groove.

[0166] After setting the above-mentioned outer magnet lifting cylinder (not shown in the drawings), the outer magnet in the U-shaped material receiving groove can be lifted to the designed height by the outer magnet lifting cylinder, and the magnet to be picked up can be separated from the magnets in the feeding groove to avoid mutual stacking and affecting grasping, ensuring the reliability of suction; at the same time, this design can also simplify the structure of the outer magnet assembly mechanism and reduce the manufacturing cost of this assembly mechanism.

[0167] The outer magnet assembly mechanism further includes an outer magnet attitude adjustment module (not shown in the drawings), and the outer magnet attitude adjustment module is integrally and fixedly arranged at the outer side of the positioning block along the symmetry center line of the U-shaped material receiving groove of the positioning block;

[0168] The outer magnet attitude adjustment module includes a U-shaped fork, an adjusting cylinder and a cylinder bracket;

[0169] The adjusting cylinder is fixedly supported through the cylinder bracket, the U-shaped fork is fixedly installed on the push rod of the adjusting cylinder, and the width of the U-shaped opening of the U-shaped fork matches the outer diameter dimension of the shaft at the position with a dial on the outer magnet;

[0170] Under the push of the push rod of the adjusting cylinder, the two end faces of the U-shaped opening of the U-shaped fork are used to push the dial on the outer magnet along the symmetry center line direction of the U-shaped material receiving groove, so as to adjust the attitude of the outer magnet before assembly.

[0171] After adopting the above outer magnet attitude adjustment module in this technical solution, the dial on the outer magnet can be pushed by the extension of the U-shaped fork, so as to avoid the dial on the outer magnet being in the due left or due right direction (due left or due right with reference to the symmetry center line of the U-shaped material receiving groove), thereby avoiding that after the dial on the outer magnet is in the due left or due right direction and it is assembled onto the bushing: when the movement is installed at the subsequent movement assembly station, it is easy to have a hard contact with the transmission structure on the movement that cooperates with the dial on the outer magnet, and further cause collision damage or breakage.

[0172] It can be seen that after adopting the above outer magnet attitude adjustment module, the assembly quality of the outer magnet and the subsequent movement can be effectively guaranteed, so as to better ensure the assembly quality of the complete watch.

[0173] IV. Lower cover seal assembly mechanism

[0174] The lower cover seal assembly mechanism includes:

[0175] The sealing ring flat positioning module has a sealing ring support and positioning flat plate, on which there is a sealing ring insertion position for the vertical insertion of the sealing ring. At the sealing ring insertion position, there is a positioning step hole for the insertion of the inverted sealing ring, and the step surface contacts the lower end surface of the sealing ring. The hollow part inside the positioning step hole can allow the inverted lower cover to completely penetrate from bottom to top;

[0176] The lower cover conveying and lifting module has a lower cover conveying line and a lower cover lifting cylinder. There is an assembly lifting point on the rear side in the advancing direction of the lower cover conveying line: when the lower cover is conveyed to the assembly lifting point, it stops. The lower cover lifting cylinder is used to lift the lower cover at the assembly lifting point and penetrate the positioning step hole on the sealing ring support and positioning flat plate of the sealing ring flat positioning module, so that the upper inner convex edge of the inverted sealing ring overlaps the connecting flange of the lower cover;

[0177] The lower cover adsorption and transfer module has a lower cover adsorption and transfer arm equipped with a vacuum suction nozzle for the lower cover. After the vacuum suction nozzle for the lower cover sucks the top surface of the inverted lower cover, it is transferred to face the upper cover on the loading seat at the lower cover encapsulation and assembly station and then released, completing the online assembly of the lower cover and the sealing ring.

[0178] Using the lower cover and sealing ring assembly mechanism in this solution can achieve the following more reasonable assembly process and better assembly quality. The specific assembly process is as follows:

[0179] First, use the sealing ring flat positioning module to first load the sealing ring and complete precise positioning;

[0180] Secondly, the lower cover conveying and lifting module uses the lower cover lifting cylinder to push the conveyed lower cover from bottom to top into the positioning step hole on the sealing ring support and positioning flat plate in the sealing ring flat positioning module; because of the structural feature that "the hollow part inside the positioning step hole is used for the lower cover to completely penetrate from bottom to top" (that is: there is a gap between the inner side surface of the positioning step hole and the outer side surface of the shell sealing surface of the lower cover), it can effectively avoid the scraping between the outer side surface of the lower cover in the circumferential direction and the sealing ring support and positioning flat plate, playing a better role in protecting the appearance of the lower cover;

[0181] Finally, after the lower cover is lifted in place, the lower cover adsorption and transfer module can be used to suck and transfer the lower cover and the sealing ring and complete the online assembly of the two.

[0182] As can be seen from the above, compared with the prior art, the advantages of the lower cover and sealing ring assembly mechanism in this solution are:

[0183] The upper and lower cover seal ring assembly mechanism is composed of a relatively simple structure, with a low manufacturing cost. At the same time, it can make the assembly process between the lower cover seal rings more reasonable. By positioning the seal ring first and then moving the lower cover into place and lifting it to socket the seal ring, the combination between the two assembled parts of the seal ring and the lower cover is realized. Finally, the lower cover adsorption transfer module can install the above two assembled parts at one time, better ensuring the assembly quality of the lower cover seal ring.

[0184] During implementation, the top edge of the positioning step hole has a chamfer. After setting this chamfer, the accuracy required for aligning and installing the seal ring on the seal ring support and positioning flat plate can be reduced, and the accuracy of installing the seal ring on the seal ring support and positioning flat plate can be improved.

[0185] A blocking block is provided at the position of the assembly lifting point and is located above the lower cover conveyor line.

[0186] The above setting of the blocking block can prevent the lower cover on the lower cover conveyor line from moving further, thus achieving accurate positioning and reducing the control difficulty of using the lower cover conveyor line to control the displacement of the lower cover.

[0187] Positioning holes are provided on the peripheral surfaces of the seal ring support and positioning flat plate at the outer side of the upper end of the positioning step hole.

[0188] The above setting of the positioning holes can cooperate with the corresponding guide posts on the seal ring picking and placing structure (i.e., the conical tube sections of the clamping posts on the short side and the clamping posts on the long side in the seal ring picking and placing structure) to achieve accurate positioning, ensuring that the seal ring can be accurately loaded.

[0189] The seal ring support and positioning flat plate is of a long strip structure, and seal ring insertion positions are symmetrically arranged at both ends in its own length direction in a mirror image manner;

[0190] The seal ring flat positioning module further includes a 180-degree rotary cylinder for the seal ring. The seal ring support and positioning flat plate is fixed on the rotary table of the 180-degree rotary cylinder for the seal ring, and the midpoint in the length direction of the seal ring support and positioning flat plate coincides with the axis line of the rotary table of the 180-degree rotary cylinder for the seal ring;

[0191] The 0-degree of the rotary table of the 180-degree rotary cylinder for the seal ring constitutes the seal ring loading position, and the 180-degree position is directly above the assembly lifting point.

[0192] In this way, the rhythm of seal ring loading and the assembly between the seal ring and the lower cover per unit time can be improved, and the assembly speed between the seal ring and the lower cover can be accelerated.

[0193] The lower cover adsorption transfer arm includes a gantry bracket for lower cover and seal ring assembly. The top frame of the gantry bracket for lower cover and seal ring assembly is above the annular guide rail of the assembled meter production line of the diaphragm gas meter;

[0194] The lower cover adsorption transfer arm further includes a lifting cylinder, a 180-degree rotary cylinder for the lower cover, and a long support flat plate; the push rod of the lifting cylinder faces downward and is vertically fixedly installed on the lower side of the top frame of the gantry bracket for lower cover seal assembly; the 180-degree rotary cylinder for the lower cover is fixedly installed on the lower surface of the push rod of the lifting cylinder; the support flat plate is fixedly installed on the rotary table of the 180-degree rotary cylinder for the lower cover, and the midpoint of the support flat plate coincides with the axis of the rotary table of the 180-degree rotary cylinder for the lower cover; the lower cover vacuum suction nozzles are fixedly installed on the lower sides of both ends in the length direction of the support flat plate.

[0195] The 0-degree position of the rotary table of the 180-degree rotary cylinder for the lower cover constitutes the lower cover seal suction position, and the 180-degree position is the upper line assembly position of the lower cover seal.

[0196] In this way, the initial assembly between the lower cover and the seal within a unit time can be improved, and the assembly beat of the overall initial assembly between the lower cover and the seal for upper line assembly can be increased, thus enhancing the assembly efficiency.

[0197] The length direction of the lower cover conveyed on the lower cover conveyor line is consistent with the conveying direction of the conveyor belt.

[0198] The lower cover conveying and lifting module further includes a lower cover attitude detection and adjustment unit; the lower cover attitude detection and adjustment unit is arranged on the front side in the advancing direction of the lower cover conveyor line and forms a lower cover attitude detection and adjustment position.

[0199] The lower cover attitude detection and adjustment unit includes a controllable stopper, an image acquisition sensor, an attitude detection controller, and a lifting and rotating cylinder assembly.

[0200] The controllable stopper can be lifted and lowered vertically and is capable of blocking or releasing the lower cover conveyed on the lower cover conveyor line.

[0201] The image acquisition sensor is fixedly installed on the side or directly above the lower cover conveyor line. The camera of the image acquisition sensor is used to capture the video signal of the long protrusions and short protrusions on the shell sealing surface of the lower cover and send it to the attitude detection controller, and the attitude detection controller is used to judge the front-back order of the long protrusions and short protrusions on the shell sealing surface of the lower cover in the conveying direction of the lower cover conveyor line.

[0202] The lifting and rotating cylinder assembly includes a vertical cylinder with a push rod facing upward and a 180-degree rotary cylinder fixedly installed at the upper end of the push rod. A long top rotating block is fixedly installed on the rotary table of the 180-degree rotary cylinder; the outer shape of the top rotating block matches the outer shape and size of the inner top of the lower cover.

[0203] The working principle of the above-mentioned lower cover attitude detection and adjustment unit is as follows:

[0204] First, a controllable stopper is used to block the front side of the lower cover on the conveyor belt;

[0205] Next, the image acquisition sensor (industrial camera, if the light is low, the lighting can be added; not shown in the attached figure) photographs the sequence of the long protrusions and short protrusions on the shell sealing surface of the lower cover in the conveying direction of the conveyor belt; combined with the orientation of the long bracket and the short bracket on the movement group to be assembled in the upper cover, the judgment is made (the long protrusion needs to be matched with the long bracket, and the short protrusion needs to be matched with the short bracket);

[0206] Then, when the long protrusion / short protrusion is not aligned with the long bracket / short bracket one by one, the posture detection controller sends a control signal to the lifting and rotating cylinder assembly to rotate 180 degrees to adjust the posture;

[0207] Finally, make sure that the long protrusion / short protrusion is not aligned with the long bracket / short bracket one by one, and the controllable stopper retracts to allow the lower cover on the conveyor belt to pass.

[0208] It can be seen from the above that the setting of the lower cover posture detection and adjustment unit in this scheme can automatically complete the detection and adjustment of the lower cover posture without human intervention to judge and adjust "whether the long protrusion / short protrusion is not aligned with the long bracket / short bracket", thereby significantly improving the intelligence and correctness of the lower cover assembly.

[0209] The lower cover sealing ring assembly mechanism also includes a sealing ring feeding structure and a sealing ring removing structure.

[0210] V. Sealing ring feeding mechanism

[0211] The sealing ring feeding mechanism includes a cantilever, a cantilever supporting structure and an upper-line sealing ring in place detection module;

[0212] The rear end of the cantilever is fixedly mounted on the cantilever support structure; the front section of the cantilever has a suspended sealing ring conveyor belt assembly, on which a plurality of sealing rings can be placed in parallel and can be output one by one toward the front end of the conveyor belt under the drive of a synchronous belt drive motor;

[0213] The upper line sealing ring in place detection module is used to detect whether there is a sealing ring at the front end of the conveyor belt where the material is to be taken and output a detection signal.

[0214] The working principle of the sealing ring feeding mechanism of this scheme is:

[0215] When the upper line sealing ring in place detection module is in use: when the sealing ring conveyor belt detects a sealing ring at the material-removing position, the synchronous belt drive motor stops driving, and the sealing ring at this position is in the state of being able to be clamped and transferred by the sealing ring removal structure;

[0216] When the online seal ring in-place detection module fails to detect the seal ring within a time less than the preset time, the synchronous belt drive motor drives the conveyor belt to continuously convey forward and replenish materials to the front end waiting for material taking position;

[0217] When the online seal ring in-place detection module fails to detect the seal ring within a time greater than or equal to the preset time, a material shortage signal is output to remind the worker to replenish materials in time.

[0218] Compared with the prior art, the advantages of the seal ring feeding mechanism of this solution are:

[0219] The conveyor belt of the seal ring conveyor belt assembly on the cantilever can hang and store multiple seal rings through its length and can send out the seal rings one by one to the front end waiting for material taking position. Therefore, this solution can realize batch feeding and supply of seal rings and better solve the difficult problems existing in the industry.

[0220] During implementation, it is preferably fixedly installed with a stop block at the front end waiting for material taking position of the conveyor belt. The stop block is used to resist and limit the seal ring to ensure that the seal ring can be simply and reliably located at this stop block position and receive the detection of the online seal ring in-place detection module.

[0221] During implementation, when the number of cantilevers is single, the synchronous belt drive motor can be directly fixedly installed on the side support frame of the seal ring conveyor belt assembly. The output shaft of the synchronous belt drive motor is drivingly connected to the shaft of the driving wheel in the seal ring conveyor belt assembly (connected by a belt or gear meshing).

[0222] During implementation, the online seal ring in-place detection module can adopt a photoelectric sensor or a proximity sensor. By the signal change generated by the sensor within a specified time (measured according to the moving speed and distance of the conveyor belt), it can be judged whether there is a seal ring at this position.

[0223] The cantilever support structure includes a controllable turntable and a turntable support; the rear side of the controllable turntable is rotatably installed on the turntable support and a turntable drive motor for driving the controllable turntable to rotate is fixedly installed on the turntable support;

[0224] At least two cantilevers are vertically and fixedly installed on the front end face of the controllable turntable at equal intervals along its circumference. Among all the cantilevers, the cantilever that rotates to the lowermost side along the controllable turntable is the discharging arm.

[0225] The advantages of the above cantilever support structure are:

[0226] 1. Through the above controllable turntable and at least two fixedly installed cantilevers, in this way, the number of cantilevers and the number of seal rings loaded on the cantilevers can be doubled. Ensure that replenishment is not required for a longer time after a single loading, and extend the time of continuous and reliable feeding and assembly of the seal ring.

[0227] 2. After setting the above-mentioned discharging arm, rapid replenishment can be carried out on the material-deficient cantilever in a timely manner when the discharging arm discharges materials; in this way, it is not necessary to stop the machine, effectively ensuring the production rhythm of the seal ring and watch assembly.

[0228] The seal ring feeding mechanism further includes a cylinder for lifting the motor. The cylinder for lifting the motor is fixedly installed on the turntable bracket located below the controllable turntable through a bracket.

[0229] The push rod of the cylinder for lifting the motor faces upward, and the synchronous belt drive motor is fixedly installed on the push rod. The output gear of the synchronous belt drive motor can be meshed and connected with the drive teeth arranged on the lower side of the conveyor belt of the discharging arm under the push of the cylinder for lifting the motor.

[0230] After adopting the above structure including the cylinder for lifting the motor, a set of synchronous belt drive motors can be used to cooperate and connect with the conveyor belts of each discharging arm and can drive the conveyor belts.

[0231] In this way, not only can the drive structure of the conveyor belt of the discharging arm be simplified, but also the cost of manufacturing the seal ring feeding mechanism can be saved, with better comprehensive use effects and economic benefits.

[0232] The lower part of the turntable bracket has a rectangular support frame.

[0233] One pair of vertical frame edges of the rectangular support frame extends upward to form a pair of vertical support rods. At least two transverse strengthening connecting rods are fixedly connected at intervals in the vertical direction between the upper sections of the pair of vertical support rods. The upper sections of the pair of vertical support rods constitute the installation part for the controllable turntable to be rotatably installed.

[0234] The advantages of the above structure are as follows:

[0235] 1. The fixed connection structure of the above-mentioned pair of vertical support rods and the transverse strengthening connecting rods can improve the reliability of the overall connection and realize the reliable support of the controllable turntable.

[0236] 2. The lower part of the above-mentioned turntable bracket has a rectangular support frame. In this way, the internal or top space of the rectangular support frame can be used to load the control host of the assembly line, realizing the full utilization of space, lower center of gravity and more stable bottom. At the same time, the rectangular support frame can also make the bottom of the turntable bracket have a larger contact area with the ground, thereby helping to obtain a more stable turntable support effect.

[0237] A pair of inclined strengthening support rods are also fixedly installed between the upper sections of the pair of vertical support rods and the top of the rectangular support frame.

[0238] A pair of diagonal mounting rods are fixedly installed at the middle position in the length direction of the pair of diagonal reinforcing support rods, and the upper line sealing ring in-place detection module is fixedly installed at the upper end positions of the pair of diagonal mounting rods.

[0239] After using the above pair of diagonal reinforcing support rods to support a pair of vertical support rods, a stable triangular connection structure can be formed by the pair of vertical support rods, the diagonal reinforcing support rods and the top of the rectangular support frame, ensuring that the turntable bracket can be durable, firm and reliable.

[0240] In addition, the above pair of diagonal mounting rods are relatively simple to install, and can make the upper line sealing ring in-place detection module located at the upper end positions of the pair of diagonal mounting rods have a simple and reliable support structure and an ideal detection position.

[0241] The upper line sealing ring in-place detection module is an opposed photoelectric sensor facing the side of the sealing ring at the front end of the conveyor belt where the material is to be taken.

[0242] During implementation, the opposed photoelectric sensor can be an opposed laser sensor or an optical fiber sensor.

[0243] The sealing ring feeding mechanism further includes a sealing ring transferring structure, which is used to clamp and transfer a single sealing ring at the front end of the conveyor belt where the material is to be taken to the lower cover sealing ring assembling mechanism.

[0244] VI. Sealing ring transferring structure

[0245] The sealing ring transferring structure includes a robot with clamping jaws;

[0246] The robot is an industrial six-axis robot, and the clamping jaws are fixedly installed on the end effector of the industrial six-axis robot;

[0247] The clamping jaws include a rectangular clamping plate. One surface of the clamping plate is the mounting surface fixed to the end effector of the industrial six-axis robot, and the other surface is the clamping surface;

[0248] On a pair of long sides of the clamping surface: an outwardly protruding clamping post for the long side is fixedly installed on one long side, and a laterally movable clamping block that can reciprocate along the width direction of the clamping plate is installed on the other long side. A laterally clamping cylinder is fixedly installed on the mounting surface of the clamping plate, and the laterally movable clamping block is fixedly installed on the push rod of the laterally clamping cylinder;

[0249] On a pair of short sides of the clamping surface: an outwardly protruding clamping post for the short side is fixedly installed at the upper short side; a vertically movable clamping block that can reciprocate along the length direction of the clamping plate is installed on the lower short side. A vertically clamping cylinder is fixedly installed below the mounting surface of the clamping plate, and the vertically movable clamping block is fixedly installed on the push rod of the vertically clamping cylinder;

[0250] The rated thrust of the vertical clamping cylinder is greater than the rated thrust of the horizontal clamping cylinder.

[0251] The operation process of the seal ring picking and placing structure in this solution is as follows:

[0252] First, the manipulator drives the clamping plate to be vertically aligned with and close to the seal ring.

[0253] Secondly, the long-side clamping posts, horizontally movable clamping blocks, short-side clamping posts and vertically movable clamping blocks arranged around the clamping plate surround the suspended seal ring.

[0254] Next, the horizontal clamping cylinder drives the horizontally movable clamping block and the long-side clamping post to horizontally clamp the seal ring, providing a horizontal clamping effect to initially clamp the seal ring.

[0255] And because "the rated thrust of the vertical clamping cylinder is greater than the rated thrust of the horizontal clamping cylinder", the vertical clamping cylinder can drive the vertically movable clamping block to continue to move up, so that the upper short side of the seal ring can be separated from the cantilever and suspended until: the vertical clamping cylinder continuously drives until the top short side of the seal ring contacts the short-side clamping post to achieve vertical clamping.

[0256] Finally, the industrial six-axis robot can place the clamped seal ring flat to the predetermined position to complete the seal ring feeding.

[0257] As can be seen from the above, the advantages of the seal ring picking and placing structure in this solution are:

[0258] 1. The seal ring picking structure and process are ingenious, which can achieve better picking and protection effects.

[0259] The seal ring picking and placing structure in this solution adopts an ingenious structural design to achieve:

[0260] First, the seal ring suspended by the cantilever can be separated from and suspended from the cantilever, thus avoiding bumps or frictions with the cantilever during the seal ring picking process, preventing attitude changes during the seal ring picking process, and better protecting the integrity of the seal ring and the cantilever structure, with better protection effects.

[0261] 2. The above clamping jaw structure can clamp the seal ring around the seal ring, so as to obtain a reliable clamping effect and ensure the reliable feeding of the seal ring.

[0262] On the long side of the clamping plate, two long-side clamping posts are arranged at intervals along the same straight line parallel to the long side; on the short side of the clamping plate, two short-side clamping posts are arranged at intervals along the same straight line parallel to the short side.

[0263] By using the above-mentioned clamping posts for the long sides and the clamping posts for the short sides in pairs, multi-point contact connections can be formed on the long sides and short sides of the sealing ring, further improving the reliability of clamping the sealing ring.

[0264] Each of the clamping posts for the long sides and the clamping posts for the short sides has a two-stage structure with a cylindrical section and a conical barrel-shaped section in its own axial direction; wherein, the cylindrical section is a clamping section close to the clamping plate and its length is greater than the thickness of the sealing ring; the outer diameter of the conical barrel-shaped section gradually decreases axially away from its own cylindrical section.

[0265] The above-mentioned clamping posts for the long sides and the clamping posts for the short sides not only have the advantages of simple structure and easy processing.

[0266] At the same time, after adopting the above structure, the cylindrical sections of the clamping posts for the long sides and the clamping posts for the short sides can be used to clamp the sealing ring; and the conical barrel-shaped sections of the clamping posts for the long sides and the clamping posts for the short sides can be used to cooperate with the positioning step holes arranged in one-to-one correspondence on the sealing ring feeding tooling (i.e., the sealing ring support and positioning flat plate in the sealing ring flat positioning module) to ensure accurate feeding of the sealing ring. Thus, it has better practical effects.

[0267] During implementation, it is preferred that the clamping posts for the long sides and the clamping posts for the short sides are fixedly connected to the clamping plate through threads.

[0268] On the inner side surfaces of the cylindrical sections of the clamping posts for the long sides and the clamping posts for the short sides in the circumferential direction, there are limiting pits for the side edges of the sealing ring to fall into.

[0269] The above-mentioned structure setting of the limiting pits can play a role in limiting during the process of removing the sealing ring, thus more effectively avoiding the displacement or even dropping of the sealing ring due to extrusion during the grasping process, and improving the reliability of grasping and transferring the sealing ring.

[0270] On the plate surface of the clamping plate, in the area outside the execution hand of the industrial six-axis robot, the transverse clamping cylinder and the vertical clamping cylinder, there is a hollow structure.

[0271] The above-mentioned hollow structure on the clamping plate can help reduce the weight of the clamping plate (the load of the robot), save manufacturing materials, and reduce costs.

[0272] The above is only the preferred implementation manner of the present invention. It should be noted that for those skilled in the art, without departing from the premise of this technical solution, several deformed and improved technical solutions should also be regarded as falling within the scope protected by this claim book.

Claims

1. The assembled production line of diaphragm gas meters is characterized in that, Including: A ring-shaped bracket, the top of the ring-shaped bracket has an annular rectangular support plane with the same circular arc chamfers at its four top corners; A ring-shaped guide rail, the annular rectangular support plane is fixedly installed with the ring-shaped guide rail symmetric about the horizontal center line and the vertical center line; A conveying drive motor, one conveying drive motor is fixedly installed at each inner corner of the ring-shaped bracket. The output shaft of each conveying drive motor is vertically upward, and the axis line coincides with the center of the circle at the inner corner where it is located. A drive wheel is fixedly sleeved on the output shaft; A tensioned annular drive chain is commonly engaged and connected to the drive wheels of the conveying drive motors; An assembly station, the assembly station includes an upper cover feeding station, an outer magnet assembly station, an upper cover gluing station, a movement mechanism assembly station, a lower cover sealing ring assembly station and a discharging station arranged in sequence from front to back along the circumferential direction of the ring-shaped guide rail and evenly spaced; Loading seats, a plurality of loading seats for reversely placing and loading the upper cover are evenly and spacedly fixedly installed on the ring-shaped guide rail, and each loading seat is slidably installed on the ring-shaped guide rail through a slider, and each slider is fixedly connected to the annular drive chain through a connecting piece; The outer magnet assembly station includes an outer magnet assembly mechanism, and the outer magnet assembly mechanism includes an outer magnet transfer arm, a vacuum suction nozzle and a rotation module. The rotation module is integrally fixedly installed on the execution hand of the outer magnet transfer arm. The rotation module has a rotation part that can rotate in a vertical plane and realize angle positioning at 0 degrees, -90 degrees and -180 degrees. The vacuum suction nozzle is fixedly installed on the rotation part; The lower cover sealing ring assembly station includes a lower cover sealing ring assembly mechanism, and the lower cover sealing ring assembly mechanism includes: A sealing ring flat positioning module, which has a sealing ring support and positioning flat plate. The sealing ring support and positioning flat plate is provided with a sealing ring insertion position for vertically inserting the sealing ring. The sealing ring insertion position has a circle of positioning step holes for inserting the inverted sealing ring and the step surface contacts the lower end surface of the sealing ring. The hollow part inside the positioning step hole can completely penetrate the inverted lower cover from bottom to top; A lower cover conveying and lifting module, which has a lower cover conveying line and a lower cover lifting cylinder. There is an assembly lifting point at the rear side in the advancing direction of the lower cover conveying line: when the lower cover is conveyed to the assembly lifting point, it stops. The lower cover lifting cylinder is used to lift the lower cover at the assembly lifting point and penetrate the positioning step hole on the sealing ring support and positioning flat plate, so that the upper inner convex edge of the inverted sealing ring overlaps the connecting flange of the lower cover; A lower cover adsorption and transfer module, which has a lower cover adsorption and transfer arm equipped with a vacuum suction nozzle for the lower cover. After the vacuum suction nozzle for the lower cover sucks the top surface of the inverted lower cover, it is transferred to be directly opposite to the upper cover on the loading seat at the lower cover encapsulation and assembly station and then released to complete the online assembly of the lower cover sealing ring; Sealing ring feeding mechanism, including a cantilever, a cantilever support structure and an on-line sealing ring in-place detection module; the rear end of the cantilever is fixedly installed on the cantilever support structure; the front section of the cantilever has a suspended sealing ring conveyor belt assembly, and multiple sealing rings can be sleeved side by side on the conveyor belt of the sealing ring conveyor belt assembly and can be output one by one in the direction of the front end of the conveyor belt under the drive of a synchronous belt drive motor; the on-line sealing ring in-place detection module is used to detect whether there is a sealing ring at the front end material-taking position of the conveyor belt and output a detection signal; Sealing ring transferring structure, including a robot with jaws; the jaws include a rectangular clamping plate, one surface of the clamping plate is the fixed surface with the execution hand of the industrial six-axis robot, and the other surface is the clamping surface; on a pair of long sides of the clamping surface: an outwardly protruding clamping post for the long side is fixedly installed on one of the long sides, and a laterally movable clamping block that can reciprocate in the width direction of the clamping plate is installed on the other long side; on a pair of short sides of the clamping surface: an outwardly protruding clamping post for the short side is fixedly installed at the upper short side; a vertically movable clamping block that can reciprocate in the length direction of the clamping plate is installed on the lower short side; Each of the clamping posts for the long side and the clamping posts for the short side has a two-stage structure with a cylindrical section and a conical barrel section in its own axial direction; positioning holes are provided on the peripheral surface of the sealing ring support and positioning flat plate outside the upper end of the positioning step hole; the conical barrel section is matched with the positioning holes.

2. The assembled production line of diaphragm gas meters according to claim 1, characterized in that: Each assembly station is arranged on the straight section of the annular rectangular support plane.

3. The assembled production line of diaphragm gas meters according to claim 1, wherein: It also includes a sliding support structure, which is used for sliding support of the annular drive chain; the sliding support structure includes U-shaped grooves fixedly installed on each straight section of the annular rectangular support plane, and the lower side, the outer radial surface and the inner radial end surface of the annular drive chain are in sliding contact connection with the groove bottom and the opposite two side surfaces of the U-shaped groove.

4. The assembled production line of diaphragm gas meters according to claim 1, characterized in that: The annular rectangular support plane is a rectangular structure with two long sides and two short sides, and among all the assembly stations, the off-line station is set on one of the two short sides, and the upper cover gluing station is set on the other short side of the two short sides; the remaining stations are distributed on the two long sides in sequence.

5. The assembled production line of diaphragm gas meters according to claim 1, characterized in that: It also includes a secondary positioning mechanism for the loading seat, and the secondary positioning mechanism for the loading seat is fixedly installed on each straight section of the annular bracket; each set of the secondary positioning mechanism for the loading seat includes a rotating rod, a bearing, a bearing seat, an intermediate connecting block, a positioning driving cylinder and a positioning post; Both ends of the rotating rod are rotatably installed on the bearing seat through a bearing respectively, and the bearing seat is fixedly installed on the outer radial surface of the annular bracket; the intermediate connecting block is a strip-shaped structure as a whole, and one end in the length direction is fixedly connected with the rotating rod, and the other end in the length direction is hinged with the outer end of the push rod of the positioning driving cylinder fixedly installed on the annular bracket as a whole; a pair of the positioning posts are fixedly installed at intervals on the outer surface of the rotating rod between the two bearing seats; The slider of each loading seat is provided with a U-shaped positioning slot with an outer end chamfer on the outer radial surface of the annular guide rail; When each loading seat is correctly positioned at each assembly station, driven by the positioning driving cylinder, the intermediate connecting block is driven to rotate the rotating rod so that a pair of positioning posts on the rotating rod can be aligned and snapped into the positioning card slots of an adjacent pair of loading seats.

6. The assembled production line of diaphragm gas meters according to claim 1, wherein: The upper cover gluing station includes a support frame fixedly installed inside the surrounded area of the annular bracket and a four-axis robotic arm fixedly installed on the support frame. The lower end of the electric telescopic rod at the outer end of the four-axis robotic arm constitutes the execution hand, and a glue gun is fixedly installed on the execution hand.

7. The assembled production line of diaphragm gas meters according to claim 1, characterized in that: It also includes a bushing lubrication station, which is arranged between the upper cover feeding station and the outer magnet assembly station; The bushing lubrication station includes a mounting bracket, and an upper cover pressing unit, a transverse movement unit, and a lubricant coating unit fixedly installed on the gantry bracket; The upper cover pressing unit has a vertically telescopic lower pressing part for pressing the upper cover from top to bottom; The transverse movement unit has a transverse movement part, and the transverse movement part can drive the coating head of the lubricant coating unit to approach the inner bushing of the upper cover.

8. The membrane gas meter assembly production line according to claim 7, characterized in that: The mounting bracket is a gantry bracket and has a horizontal support frame above the annular guide rail at the top; The transverse movement unit includes a transverse movement driving cylinder fixedly installed on the horizontal support frame, and the transverse movement driving cylinder is a linear slider type rodless cylinder; The slider of the transverse movement driving cylinder is fixedly installed with the upper cover pressing unit. The upper cover pressing unit includes a downward pressing cylinder fixedly installed vertically with a push rod. A long strip-shaped pressing block is fixedly installed at the bottom of the downward pressing cylinder. The length direction of the pressing block is consistent with the width direction of the upper cover, and the length of the pressing block is greater than the width of the upper cover and the stroke of the slider of the transverse movement driving cylinder, so that the pressing block can always press the upper cover when sliding with the slider; The lubricant coating unit is fixedly installed on the outer side surface of the downward pressing cylinder.

9. The assembled production line of diaphragm gas meters according to claim 8, characterized in that: It also includes a valve assembly pressing module, which includes a downward pressing cylinder for regularizing the valve group. The push rod of the downward pressing cylinder for regularizing the valve group is vertically downward and is fixedly installed on the horizontal support frame as a whole; A valve group pressing block for pressing the valve assembly is fixedly installed on the push rod of the downward pressing cylinder for regularizing the valve group.

10. The assembled production line of diaphragm gas meters according to claim 1, characterized in that: It also includes an upper cover straightening station, which is arranged between the outer magnet assembly station and the upper cover gluing station; The upper cover straightening station includes a mounting frame with a top above the annular guide rail and an upper cover straightening downward pressing cylinder. The push rod of the upper cover straightening downward pressing cylinder is vertically downward and is fixedly installed on the top of the mounting frame as a whole; A straightening pressing block is fixedly installed on the push rod of the upper cover straightening downward pressing cylinder. The length direction of the straightening pressing block is consistent with the width direction of the upper cover and the length is greater than the width of the upper cover. The straightening pressing block is used to press the top opening end face of the upper cover with the loading seat upside down.

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