Outer magnetic steel assembling mechanism

Abstract

The application discloses an outer magnetic steel assembling mechanism, which comprises an outer magnetic steel moving arm and a vacuum suction nozzle. The outer magnetic steel moving arm is fixedly installed above a ring-shaped guide rail of a membrane gas meter assembling production line through a support. A vacuum suction nozzle is installed on an execution hand of the outer magnetic steel moving arm. The vacuum suction nozzle is used for adsorbing a single outer magnetic steel and sleeving the outer magnetic steel onto a shaft sleeve of an upper cover under the driving of the outer magnetic steel moving arm. The outer magnetic steel assembling mechanism further comprises a rotating module. The rotating module is integrally fixedly installed on the execution hand of the outer magnetic steel moving arm. The rotating module is provided with a rotating part which can rotate in a vertical plane and realize angle positioning of 0 degrees, -90 degrees and -180 degrees. The vacuum suction nozzle is fixedly installed on the rotating part. The execution hand of the outer magnetic steel moving arm, the rotating module, the rotating part and the vacuum suction nozzle can jointly extend into an internal space of the upper cover of the membrane gas meter. The outer magnetic steel assembling mechanism can simultaneously meet the membrane gas meter assembling requirements of forward air inlet and reverse air inlet.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of membrane gas meter assembly production lines, and particularly relates to an external magnetic steel assembly mechanism in a membrane gas meter assembly production line. BACKGROUND

[0002] A membrane gas meter is a volumetric metering instrument for measuring the amount of gas used. The working principle of a membrane gas meter is as follows:

[0003] Two flexible diaphragm metering chamber methods are used to measure gas volume flow. Under the action of pressure difference, gas alternately enters the two metering chambers of the movement through the distribution valve, fills the chambers, and then is discharged to the gas outlet, while pushing the flexible diaphragms in each metering chamber to reciprocate. The charging and discharging cycle is converted into the corresponding gas volume flow through a conversion mechanism, and then transmitted to the counter through a transmission mechanism to complete the cumulative metering function of the gas.

[0004] A membrane gas meter is mainly composed of a housing (including an upper cover, a lower cover, and a seal ring for pressing the upper cover and the lower cover), a movement, and a counter. The movement itself has a compact and complex structure, so a separate production line is usually used for assembly (for example, application No. 202111381250.0, published "membrane gas meter movement automatic production line").

[0005] Membrane gas meter assembly refers to assembling the assembled movement (also known as "movement body assembly") into the upper cover and the lower cover and achieving compression sealing through the seal ring between the upper cover and the lower cover.

[0006] Currently, the existing technology has disclosed a membrane gas meter assembly production line, for example, the existing document "Design and Implementation of Gas Meter Assembly Production Line" (Xu Peng et al. "Design and Implementation of Gas Meter Assembly Production Line." Mechanical Engineering and Automation 6 (2017): 3. Mechanical Engineering and Automation, December 2017: pp. 185-186).

[0007] Membrane gas meters can be divided into forward gas inlet (left inlet and right outlet) and reverse gas inlet (right inlet and left outlet) according to the installation needs of the owner's project; the existing membrane gas meter assembly production line can only meet the assembly needs of a single direction. The technical difficulty is that it is difficult to flexibly assemble the external magnetic steel in the assembly of the two gas inlet directions; therefore, at least two membrane gas meter assembly production lines are needed to meet the assembly needs of the forward gas inlet (left inlet and right outlet) and the reverse gas inlet (right inlet and left outlet) membrane gas meter assembly; obviously, this will increase the production cost and make it difficult to achieve the business goal of reducing costs and increasing efficiency.

[0008] Therefore, the applicant considers designing an external magnetic steel assembly mechanism that can simultaneously meet the assembly needs of forward gas inlet and reverse gas inlet membrane gas meters. SUMMARY

[0009] In view of the above problems of the prior art, the technical problem to be solved by the present application is how to provide an outer magnetic steel assembling mechanism capable of simultaneously meeting the assembly requirements of forward and reverse intake membrane gas meter assembly.

[0010] To solve the above technical problem, the present application adopts the following technical solution:

[0011] The outer magnetic steel assembling mechanism comprises an outer magnetic steel transfer arm and a vacuum suction nozzle.

[0012] The outer magnetic steel transfer arm is fixedly installed above the annular guide rail of the membrane gas meter assembly production line through a support, a vacuum suction nozzle is installed on the execution hand of the outer magnetic steel transfer arm, and the vacuum suction nozzle is used to adsorb a single outer magnetic steel and is sleeved onto the shaft sleeve of the upper cover under the driving of the outer magnetic steel transfer arm.

[0013] It is characterized in that it further comprises a rotating module, the rotating module is fixedly installed on the execution hand of the outer magnetic steel transfer arm as a whole, the rotating module has a rotating part capable of rotating in a vertical plane and achieving angle positioning of 0 degrees, -90 degrees and -180 degrees, and the vacuum suction nozzle is fixedly installed on the rotating part; and the execution hand of the outer magnetic steel transfer arm, the rotating module, the rotating part thereof and the vacuum suction nozzle can jointly extend into the internal space of the upper cover of the membrane gas meter.

[0014] Compared with the prior art, the outer magnetic steel assembling station in the present application has the following advantages:

[0015] 1. Only a rotating module is added to the existing mechanism, so the structure is relatively simple, and the cost of modification and implementation is relatively low.

[0016] 2. The rotating part of the rotating module can drive the vacuum suction nozzle to adsorb the outer magnetic steel when the rotating part is at -90 degrees (vertically downward), and to realize coaxial alignment with the shaft sleeve in the upper cover of the forward or reverse intake membrane gas meter assembly when the rotating part is at 0 degrees or -180 degrees, so that the outer magnetic steel assembling requirement of the forward (left intake and right outlet) and reverse (right intake and left outlet) intake membrane gas meter assembly can be met, and cost reduction and efficiency improvement can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view (top view) of the membrane gas meter assembly production line in the present technical solution.

[0018] Figure 2 It is a three-dimensional structural schematic view of the membrane gas meter assembly production line in the present technical solution.

[0019] Figure 3The three-dimensional structure diagram of the film type gas meter assembly production line (with NG product placing support)

[0020] Figure 4 The structure diagram of the film type gas meter assembly production line upper cover on-line station and shaft sleeve lubrication station

[0021] Figure 5 The structure diagram of the film type gas meter assembly production line outer magnetic steel assembly station

[0022] Figure 6 The local enlarged view of the outer magnetic steel assembly station

[0023] Figure 7 The structure diagram of the film type gas meter assembly production line upper cover glue station

[0024] Figure 8 The structure diagram of the film type gas meter assembly production line core assembly station

[0025] Figure 9 The structure diagram of the film type gas meter assembly production line lower cover sealing ring assembly station

[0026] Figure 10 The local structure diagram of the lower cover sealing ring assembly mechanism

[0027] Figure 11 The structure diagram of the film type gas meter assembly production line lower cover sealing ring assembly station

[0028] Figure 12 The structure diagram of the film type gas meter assembly production line sealing ring feeding mechanism

[0029] Figure 13 The structure diagram of the film type gas meter assembly production line sealing ring moving and taking structure

[0030] Figure 14 The structure diagram of the film type gas meter assembly production line sealing ring moving and taking structure

[0031] Marked in the figure:

[0032] Film type gas meter assembly: G1 upper cover (G11 valve assembly), G2 lower cover (G21 shell sealing surface, G22 long protrusion, G23 short protrusion), G3 outer magnetic steel (G31 paddle), G4 core, G5 sealing ring

[0033] Membrane gas meter assembly production line: L1 ring support, L2 ring guide, L3 drive motor for conveying, L4 ring drive chain, assembly station (a upper cover online station, b shaft sleeve lubrication station (b1 horizontal shift drive cylinder, b2 pressing cylinder, b3 pressing block, b4 valve group regularizing pressing cylinder), c outer magnetic steel assembly station, d upper cover righting station, e upper cover gluing station, f outer magnetic steel regularizing station, g core assembly station, h lower cover seal ring assembly station, i seal ring regularizing station, j offline station), L5 loading seat, secondary positioning mechanism of loading seat (L61 rotating rod, L62 bearing seat, L63 intermediate connecting block, L64 positioning drive cylinder, L65 positioning clamping column), L7 NG product placement support, L8 offline mechanical hand

[0034] M outer magnetic steel assembly mechanism: outer magnetic steel transfer arm (M11 gantry support, M12 guide rail, M13 sliding block, M14 strip-shaped mounting plate, M15 lifting cylinder, M16 screw module assembly), M2 vacuum suction nozzle, M3 outer magnetic steel guide material output slot, M4 positioning block (M41 U-shaped material receiving slot), M5 vibrating feeding disc, M6 rotary cylinder

[0035] N lower cover seal ring assembly mechanism: seal ring horizontal positioning module (N11 seal ring support positioning flat plate, N12 180-degree rotary cylinder for seal ring), lower cover conveying and lifting module (N21 lower cover conveying line, N22 lower cover lifting cylinder, N3 lower cover posture detection and adjustment unit (top rotary cylinder assembly (N321 top rotating block))), lower cover adsorption and transfer module (N41 vacuum suction nozzle for lower cover, lower cover adsorption and transfer arm (N421 gantry support for lower cover seal ring assembly, N422 lifting cylinder, N423 180-degree rotary cylinder for lower cover, N424 support flat plate));

[0036] X seal ring feeding mechanism: X1 cantilever, X2 cantilever support structure (X21 controllable turntable, X22 turntable support (X221 rectangular support frame, X222 vertical support rod, X223 horizontal reinforcing connecting rod, X224 inclined reinforcing support rod, X225 inclined mounting rod)), X3 pair of laser sensors, X4 motor lifting cylinder, X5 synchronous belt drive motor

[0037] Y seal ring transfer structure: Y1 industrial six-axis robot, Y2 clamping plate (Y21 fixed surface, Y22 clamping surface (Y221 long-side clamping column, Y222 horizontally movable clamping block, Y223 horizontal clamping cylinder, Y224 short-side clamping column, Y225 vertically movable clamping block, Y226 vertical clamping cylinder, Y227 cylindrical segment, Y228 conical cylindrical segment)); DETAILED DESCRIPTION

[0038] The application will be further described in detail below with reference to the drawings.

[0039] In specific implementation, as shown in the following table: Figures 1 to 3

[0040] I. The film gas meter assembly process

[0041] The film gas meter assembly process comprises the following steps:

[0042] First, at least one assembly quality detection sensor is arranged at each assembly station on the film gas meter assembly production line, which is used to detect whether the assembly station is in an NG state; and an NG product placement position is arranged near the offline position of the film gas meter assembly production line;

[0043] Secondly, when the assembly quality detection sensor detects an NG state, the assembly parts on the loading seat at the assembly station are marked as NG products, and from the assembly station to the offline position: the guide rail conveying mechanism of the film gas meter assembly production line maintains 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 incomplete parts by the subsequent stations.

[0044] Finally, when the loading seat carrying the NG products is conveyed to the offline station: the offline mechanical arm of the film gas meter assembly production line transfers the NG products to the NG product placement position.

[0045] Compared with the prior art, the film gas meter assembly process in the present scheme has the following advantages:

[0046] 1. Even if an NG state is detected by any assembly quality detection sensor, the guide rail conveying mechanism of the entire film gas meter assembly production line will not stop, and will still maintain normal conveying rhythm, so that the entire film gas meter assembly production line will not be stopped, and the production efficiency can be effectively guaranteed.

[0047] 2. The NG products are no longer assembled with incomplete parts by the subsequent stations from the assembly station where the NG state is detected to the offline position, so that the NG products can be in the initial NG state, which facilitates manual state checking of the NG products in the NG product placement position by subsequent workers and re-online of the on-line parts for gas meter assembly; in this way, the production rhythm of the film gas meter assembly production line is not affected, and the subsequent treatment of the NG products is also convenient.

[0048] The NG product placement position comprises an NG product placement support;

[0049] The NG product placement support is independent of the film gas meter assembly production line as a whole;

[0050] The NG product placement support is installed outside the offline position of the guide rail conveying mechanism of the film gas meter assembly production line.​

[0051] The NG product placing support has a placing plane for placing a plurality of NG products.

[0052] The structure of the NG product placing support is independent of the membrane-type gas meter assembly production line, and can be flexibly expanded and modified to the existing membrane-type gas meter assembly production line, and is more practical.

[0053] The NG product placing support comprises a support frame, a driving wheel and a driven wheel arranged on the top of the support frame, and a transmission belt sleeved between the driving wheel and the driven wheel; the driving wheel is driven by a driving motor, and the driving motor is electrically connected with a motor controller.

[0054] The advantage of the above structure is that the coordinates of the XYZ axis of the starting position of the upper surface movement of the transmission belt can be used as the placing coordinates of the NG product on the transmission belt by the offline mechanical hand, which facilitates the control of the placing action of the offline mechanical hand, thereby improving the reliability of the offline mechanical hand in placing the NG product.

[0055] At the same time, since the NG product placing support adopts the above structure, the transmission belt can act again to empty the above-mentioned "unique placing coordinates" for the offline mechanical hand to place the NG product again after the offline mechanical hand places the NG product.

[0056] In implementation, the driving control of the transmission belt can be preferably realized in the following two ways:

[0057] 1. The motor controller is signal-connected with the control system of the membrane-type gas meter assembly production line.

[0058] In this way, the action of the transmission belt can be controlled by time sequence, that is, the offline mechanical hand places the NG product on the above-mentioned placing coordinates on the transmission belt in time sequence, and then the motor controller controls the action of the transmission belt.

[0059] 2. The motor controller is not connected with the control system of the membrane-type gas meter assembly production line.

[0060] In this way, a detection sensor can be arranged on the NG product placing support to detect whether the placing coordinates on the transmission belt are empty, and if not, the detection sensor will act after a delay of several seconds after obtaining the detection signal (the several seconds are shorter than the time length required by a single beat of the membrane-type gas meter assembly production line).

[0061] The assembly station where the assembly quality detection sensor is arranged is one or more of the following stations: the upper cover feeding station, the outer magnetic steel assembly station, the upper cover gluing station, the core assembly station, the sealing ring assembly station, and the lower cover assembly station.

[0062] The assembly quality detection sensor is arranged at the single assembly station or multiple assembly stations, so that the assembly quality of each station can be detected, thereby better ensuring the assembly quality of the membrane gas meter assembly production line.

[0063] The assembly quality detection sensor is an optical sensor, which is arranged at the station to be detected, and the detection head of the optical sensor faces the assembly part to be detected at the assembly station.

[0064] After the optical sensor is arranged at the corresponding assembly station, the optical sensor can obtain two different detection signals in the state of the corresponding assembly part being installed or not installed, so that whether the assembly part is installed or not can be judged by the two different detection signals, and whether the NG state occurs can be judged accordingly.

[0065] In implementation, the optical sensor is preferably a laser optical sensor or a fiber sensor with stronger anti-interference performance. In this way, more reliable assembly quality detection signals can be obtained for a long time.

[0066] II. Membrane gas meter assembly production line

[0067] The membrane gas meter assembly production line comprises:

[0068] The top of the annular support has a ring-shaped rectangular support plane with four top corners each being a same circular arc chamfer;

[0069] The ring-shaped rectangular support plane is fixedly installed with the annular guide rail which is symmetrical about the transverse center line and the longitudinal center line;

[0070] The conveying driving motor is fixedly installed at each inner corner of the annular support, the output shaft of each conveying driving motor is vertically upward, the shaft center line coincides with the center of the inner corner, and a driving wheel is fixedly sleeved on the output shaft; the driving wheels of the conveying driving motors are jointly meshed with a tensioned annular driving chain;

[0071] The assembly station comprises the upper cover upper line station, the outer magnetic steel assembly station, the upper cover gluing station, the movement core assembly station, the lower cover sealing ring assembly station, and the lower line station which are sequentially arranged and uniformly spaced along the ring direction of the annular guide rail;

[0072] The loading seat is fixedly installed on the annular guide rail and matched with the number of assembly stations, and a plurality of loading seats for loading the upper cover upside down are uniformly spaced, each loading seat is slidably installed on the annular guide rail through a sliding block, and each sliding block is fixedly connected with the annular driving chain through a connecting piece.

[0073] Compared with the prior art, the membrane gas meter assembly production line has the advantages that:

[0074] 1. The entire membrane gas meter assembly production line is in a ring type layout, the ring type layout has a smaller land area, can be flexibly arranged according to the characteristics of the site, and has better practicability.

[0075] 2. The ring type layout of the membrane gas meter assembly production line can make the loading of the upper cover, the outer magnetic steel, the movement set, the lower cover and the sealing ring also be in a ring type layout to fully utilize the space outside the ring type support, improve the space utilization rate, and facilitate the centralized feeding of the production workshop through the automatic conveying line, thereby reducing the production cost.

[0076] 3. The number of loading seats is matched with the number of assembly stations, the loading seats are always installed on the ring type guide rail and circulate, and are in an effective utilization state during the entire assembly process. While ensuring the production rhythm, the number of loading seats is set to be smaller, and the production line structure in the scheme is more reasonable and simple.

[0077] In implementation, most preferably, the number of loading seats is 1-3 more than the number of assembly stations (some functional structures can be expanded according to the production of different types of products). Secondarily preferably, the number of loading seats is the same as the number of assembly stations.

[0078] In specific implementation, the outer magnetic steel assembly station adopts an outer magnetic steel assembly mechanism, and the movement set assembly station adopts a movement set assembly mechanism.

[0079] Each assembly station is arranged on a straight line segment of the ring type support plane.

[0080] The straight line segment of the ring type support plane can better judge the displacement accuracy of the loading seat that travels to the straight line segment, thereby better ensuring the reliability of the smooth assembly of each assembly station on the premise of ensuring the travel accuracy of the loading seat.

[0081] The membrane gas meter assembly production line also includes a sliding support structure for slidingly supporting the ring type driving chain. The sliding support structure includes a U-shaped groove fixedly installed on each straight line segment of the ring type support plane, and the lower side, the radially outer side and the radially inner end face of the ring type driving chain are in sliding contact connection with the groove bottom and the opposite two side faces of the U-shaped groove.

[0082] The sliding support structure can slidingly support the ring type driving chain, better avoid the deformation of the ring type driving chain caused by its own gravity, and prolong the service life thereof.

[0083] In implementation, a lubricating medium (lubricating medium or lubricating grease) is coated between the contact surface of the U-shaped groove and the ring type driving chain.

[0084] The annular rectangular supporting plane is a rectangular structure with two long sides and two short sides, and the lower line station in all assembly stations is arranged on one of the two short sides, and the other short side is provided with an upper cover glue coating station; the remaining stations are sequentially distributed on the two long sides.

[0085] After the above layout, the upper cover online station, the outer magnetic steel assembly station, the movement core assembly station and the lower cover ring sealing assembly station which need to be fed are distributed close to the positions outside the four corners of the annular rectangular supporting plane, which has a larger layout space, facilitates the layout of various feeding devices, and makes the layout of the production line more compact and reasonable.

[0086] The membrane type gas meter forming and assembling production line also comprises a loading seat secondary positioning mechanism, and each flat section of the annular support is fixedly provided with the loading seat secondary positioning mechanism; each set of the loading seat secondary positioning mechanism comprises a rotating rod, a bearing, a bearing seat, an intermediate connecting block, a positioning driving cylinder and a positioning clamping column.

[0087] The two 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 radial outer side of the annular support; the intermediate connecting block is in a strip 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 hingedly connected with the outer end of the push rod of the positioning driving cylinder which is fixedly installed on the annular support as a whole; a pair of positioning clamping columns are fixedly installed on the outer surface of the rotating rod between the two bearing seats;

[0088] The sliding block of each loading seat is provided with a U-shaped positioning clamping groove with an outer end chamfer on the radial outer side of the annular guide rail;

[0089] When each loading seat is correctly positioned at each assembly station, the intermediate connecting block is driven by the positioning driving cylinder to rotate the rotating rod and make a pair of positioning clamping columns on the rotating rod be able to be aligned and clamped into the positioning clamping groove of the adjacent pair of loading seats.

[0090] After the above loading seat secondary positioning mechanism is adopted, at each beat point: the positioning driving cylinder drives the intermediate connecting block to act and rotate the rotating rod, and a pair of positioning clamping columns are clamped into the positioning clamping groove of the adjacent pair of loading seats, so that the positioning of the loading seat during repeated cyclic movement is realized, thereby effectively ensuring that each loading seat can be at the correct assembly station after each cyclic movement.

[0091] Meanwhile, when any loading seat is slightly misaligned, the secondary positioning mechanism of the loading seat can drive the rotating rod to rotate through the positioning driving cylinder, and a pair of positioning pins on the rotating rod can act on the positioning slot to adjust the micro-motion (reverse or forward) of the annular driving chain and make the loading seat return to the correct assembly station.

[0092] The upper cover gluing station comprises a support frame fixedly installed inside the surrounding area of the annular support frame and a four-axis mechanical arm fixedly installed on the support frame, the lower end of the electric telescopic rod at the outer end of the four-axis mechanical arm constitutes an execution hand, and a glue gun is fixedly installed on the execution hand.

[0093] In this scheme, the above four-axis mechanical arm can realize precise movement on the XYZ axis, so as to better adapt to the gluing operation of membrane gas meter shells of various models and improve the universality of the production line.

[0094] (for example, Xin Song ST series or SRH10A series industrial robots or Kuka KUKA KR6 R500 Z200 type four-axis industrial robots)

[0095] The membrane gas meter assembly production line also comprises a shaft sleeve lubricating station arranged between the upper cover online station and the outer magnetic steel assembly station.

[0096] The shaft sleeve lubricating station comprises a mounting bracket, an upper cover pressing unit, a horizontal moving unit and a lubricating medium coating unit fixedly installed on the gantry bracket.

[0097] The upper cover pressing unit has a vertical telescopic lower pressing part for pressing the upper cover from top to bottom.

[0098] The horizontal moving unit has a horizontal moving part which can drive the coating head of the lubricating medium coating unit to approach the shaft sleeve in the upper cover.

[0099] The arrangement of the above-mentioned shaft sleeve lubricating station can effectively lubricate the shaft sleeve before the outer magnetic steel is assembled, better ensure that the outer magnetic steel can work reliably and durably after being installed, and better ensure the assembly quality of the membrane gas meter.

[0100] The mounting bracket is a gantry bracket and has a horizontal support frame above the annular guide rail at the top.

[0101] The horizontal moving unit comprises a horizontal moving driving cylinder fixedly installed on the horizontal support frame, and the horizontal moving driving cylinder is a straight-line slider type rodless cylinder.

[0102] The slider of the horizontal movement driving cylinder is fixedly installed with the upper cover pressing unit, the upper cover pressing unit includes a vertical fixed and push rod downward pressing cylinder, the bottom of the pressing cylinder is fixedly installed with a long strip-shaped pressing block, the length direction of the pressing block is consistent with the width direction of the upper cover, the length of the pressing block is greater than the width of the upper cover and the stroke of the slider of the horizontal movement driving cylinder, so that the pressing block can always press the upper cover when the slider slides;

[0103] The outer side of the pressing cylinder is fixedly installed with the lubricating medium coating unit.

[0104] The shaft sleeve lubricating station has the advantages that:

[0105] 1. After the production line is started, the horizontal movement cylinder can select the left and right work positions according to the MES production order information of the company, and after moving to the position, the upper cover pressing unit can act according to the assembly position information, so that the upper cover can obtain a stable fixed position, and the lubricating medium coating unit can contact the shaft sleeve to coat the lubricating medium when the upper cover pressing unit acts, thereby completing the lubrication of the shaft sleeve.

[0106] 2. The structure of the installation support, the horizontal movement unit, the upper cover pressing unit and the lubricating medium coating unit is reasonable, the action is precise and reliable, and the lubrication quality of the shaft sleeve can be ensured.

[0107] The diaphragm gas meter assembly production line also includes a valve assembly pressing module, the valve assembly pressing module includes a valve group regularizing pressing cylinder, the push rod of the valve group regularizing pressing cylinder is vertically downward and is fixedly installed on the horizontal support frame as a whole;

[0108] The push rod of the valve group regularizing pressing cylinder is fixedly installed with a valve group pressing block for pressing the valve assembly.

[0109] After the valve assembly pressing module is used, the space of the shaft sleeve lubricating station can be more fully utilized, and the valve assembly pressing module can be used to align the valve assembly in the upper cover of the station, press and regularize the valve assembly, and ensure the assembly quality of the valve assembly.

[0110] The diaphragm gas meter assembly production line also includes an upper cover righting station, the upper cover righting station is arranged between the outer magnetic steel assembly station and the upper cover gluing station;

[0111] The upper cover righting station includes a mounting bracket with the top being above the annular guide rail and an upper cover righting pressing cylinder, the push rod of the upper cover righting pressing cylinder is vertically downward and is fixedly installed on the top of the mounting bracket as a whole.

[0112] The push rod of the lower pressing cylinder of the upper cover righting device is fixedly installed with a righting pressing block, the length direction of the righting pressing block is consistent with the width direction of the upper cover, and the length of the righting pressing block is greater than the width of the upper cover, and the righting pressing block is used for pressing the top opening end surface of the upper cover of the inverted loading seat.

[0113] Because the outer magnetic steel contacts the shaft sleeve during assembly into the upper cover, the contact may cause slight skew of the upper cover of the loading seat, and the skew may cause difficulty in guaranteeing the glue coating quality (glue coating position and thickness) of the glue coating station of the upper cover group. Therefore, after assembly of the outer magnetic steel is completed, the above-mentioned upper cover righting station is arranged to right the upper cover, ensure that the glue coated upper cover has a consistent correct posture, and thus the glue coating quality can be effectively and durably guaranteed.

[0114] In implementation, the membrane type gas meter complete assembly production line further comprises an outer magnetic steel shaping station, which is arranged between the upper cover glue coating station and the core assembly station.

[0115] The outer magnetic steel shaping station comprises a gantry support, a linear sliding block type rodless cylinder, a lifting cylinder and an outer magnetic steel righting rod.

[0116] The top of the gantry support has a horizontal support frame above the annular guide rail.

[0117] The sliding block of the linear sliding block type rodless cylinder moves in a direction parallel to the length direction of the annular guide rail directly below, and the sliding block of the linear sliding block type rodless cylinder is fixedly installed with the lifting cylinder with the push rod downward.

[0118] The push rod of the lifting cylinder is fixedly installed with the outer magnetic steel righting rod.

[0119] The lifting cylinder is used to drive the outer magnetic steel righting rod to extend into and withdraw from the upper cover, and when the outer magnetic steel righting rod extends into the upper cover, the linear sliding block type rodless cylinder can drive the outer magnetic steel righting rod to move away from or close to and abut against the end surface of the outer magnetic steel away from the shaft sleeve to realize righting.

[0120] In the technical solution, the annular guide rail is adopted, and the four top corners of the annular guide rail are chamfered in the same circular arc shape. In this way, for the membrane type gas meter in which the shaft sleeve of the upper cover of the loading seat is located on the radial inner side of the annular guide rail, the outer magnetic steel sleeved on the shaft sleeve is easy to move slightly along the radial direction of the annular guide rail under the action of centrifugal force.

[0121] Therefore, after the above-mentioned outer magnetic steel shaping station is adopted in the technical solution, the outer magnetic steel righting rod can be used to push and press the outer magnetic steel back to the accurate assembly position, and the assembly quality can be effectively guaranteed.

[0122] Specific implementation of the core assembly station

[0123] In implementation, the movement assembly assembling station comprises a movement assembly conveying belt, a movement assembly transfer robot, a movement assembly outlet lubricating module and a movement assembly assembling robot.

[0124] The movement assembly conveying belt is used to convey the movement assembly; the movement assembly transfer robot is used to convey the movement assembly on the movement assembly conveying belt to the conveying belt of the movement assembly outlet lubricating module, the conveying belt is two conveying belts arranged side by side and spaced apart; at least two pairs of clamping blocks are arranged on the left and right outer sides of the two conveying belts and spaced apart along the length direction of the conveying belt to clamp the movement assembly on the conveying belt; at least two sets of jacking mechanisms are arranged in the gap between the two conveying belts and spaced apart along the length direction of the gap to jack up the movement assembly upward; and the movement assembly outlet lubricating module is fixedly installed at the jacking mechanism located in the front direction of the conveying direction of the two conveying belts, the movement assembly outlet lubricating module comprises a vertical lifting cylinder, a lubricating disc, a driving motor for rotating the lubricating disc and an oil supply mechanism, the push rod of the vertical lifting cylinder drives the lubricating disc with lubricating medium to align and contact with the movement assembly outlet from top to bottom, at this time, the driving motor drives the lubricating disc to rotate to evenly smear the lubricating medium on the movement assembly outlet, thereby realizing the lubrication of the movement assembly outlet.

[0125] The movement assembly on-line robot clamps the movement assembly by a special-purpose jaw and conveys it to the upper cover on the loading seat of the station.

[0126] Specific implementation of the sealing ring shaping station

[0127] In implementation, the membrane-type gas meter forming and assembling production line further comprises a sealing ring shaping station, the sealing ring shaping station is arranged between the lower cover sealing ring assembling station and the off-line station;

[0128] The sealing ring shaping station comprises a righting cylinder, a righting support, a righting ring and a righting ring mounting plate;

[0129] The push rod of the righting cylinder faces downward and the cylinder is fixedly installed through the righting support;

[0130] The righting ring mounting plate is fixedly installed on the push rod of the righting cylinder, the righting ring mounting plates are fixedly connected around through connecting columns, and the distance between the righting ring and the righting ring mounting plate is greater than the height of the lower cover;

[0131] The righting ring has a whole runway type structure, and when the righting ring is wholly sleeved at the connecting position between the lower cover and the upper cover, the innermost side surface of the righting ring is spaced apart from the outer side surface of the lower cover;

[0132] The inner lower end surface of the righting ring has an annular righting groove for the radial outer edge of the sealing ring to fall into.

[0133] After the above gasket shaping station is used, the gasket can be further pressed down by the gasket shaping station after the lower cover packaging assembly is completed, effectively preventing the gasket from being tilted, and better ensuring the assembly quality between the gasket and the lower cover.

[0134] III, outer magnetic steel assembly mechanism

[0135] The outer magnetic steel assembly mechanism comprises an outer magnetic steel transfer arm and a vacuum suction nozzle.

[0136] The outer magnetic steel transfer arm is fixedly installed above the annular guide rail of the membrane gas meter assembly production line through a support, a vacuum suction nozzle is installed on the execution hand of the outer magnetic steel transfer arm, and the vacuum suction nozzle is used to adsorb a single outer magnetic steel and is sleeved onto the shaft sleeve of the upper cover under the driving of the outer magnetic steel transfer arm.

[0137] Further comprising a rotating module, the rotating module is fixedly installed on the execution hand of the outer magnetic steel transfer arm as a whole, the rotating module has a rotating part capable of rotating in a vertical plane and achieving angle positioning of 0 degrees, -90 degrees and -180 degrees, and the vacuum suction nozzle is fixedly installed on the rotating part; and the execution hand of the outer magnetic steel transfer arm, the rotating module, the rotating part thereof and the vacuum suction nozzle can jointly extend into the internal space of the upper cover of the membrane gas meter.

[0138] Compared with the prior art, the outer magnetic steel assembly station in the present scheme has the following advantages:

[0139] 1. Only a rotating module is added to the existing mechanism, so the structure is relatively simple, and the cost of modification and implementation is relatively low.

[0140] 2. The rotating part of the rotating module can drive the vacuum suction nozzle to suck the outer magnetic steel at -90 degrees (vertically downward), and to realize coaxial alignment with the shaft sleeve in the upper cover of the membrane gas meter at 0 degrees or -180 degrees, so as to be applicable to the assembly of outer magnetic steels on the upper cover of the membrane gas meter with forward air intake (left intake and right outlet) and reverse air intake (right intake and left outlet), thereby realizing cost reduction and efficiency increase.

[0141] The rotating unit is a servo motor or a rotating cylinder.

[0142] Both the servo motor and the rotating cylinder can achieve precise rotation control in the circumferential direction.

[0143] The servo motor can be an AKM1 series synchronous servo motor of Kormoran.

[0144] The rotating cylinder can be a rotating swing cylinder of model CRB2BS20-180SZ produced by SMC Company of Japan.

[0145] The outer magnetic steel transfer arm can adopt an industrial robot. The following structure can also be adopted:

[0146] The outer magnetic steel transfer arm comprises a gantry support, a guide rail, a sliding block, a strip-shaped mounting plate, a lifting cylinder and a screw module assembly.

[0147] The top of the gantry support has a horizontally arranged rectangular frame, which is arranged above the annular guide rail of the membrane-type gas meter assembly production line.

[0148] The upper surface of the two parallel edges of the rectangular frame perpendicular to the length direction of the annular guide rail below is fixedly installed with the guide rail and the screw module assembly; the sliding block is slidably sleeved on the guide rail, and the reciprocating nut on the screw module assembly is fixedly connected with the sliding block through the strip-shaped mounting plate.

[0149] The push rod of the lifting cylinder is downwardly and fixedly installed on the lower surface of the strip-shaped mounting plate, and the push rod of the lifting cylinder constitutes the execution hand of the outer magnetic steel transfer arm.

[0150] The structure of the above outer magnetic steel transfer arm realizes horizontal movement through the guide rail and the screw module assembly, so that the vacuum suction nozzle can be horizontally transferred from the position directly above the discharge port of the outer magnetic steel to the position directly above the inner cover to be installed. The setting of the lifting cylinder can help smoothly realize the lifting in the vertical direction and be used for the alignment of the outer magnetic steel in the height direction during suction and assembly.

[0151] Compared with the industrial robot, the structure of the above outer magnetic steel transfer arm has the advantages of lower cost and reliable action.

[0152] The outer magnetic steel assembly mechanism further comprises an outer magnetic steel assembly detection module, which comprises a photoelectric sensor fixedly installed on the gantry support, and the probe of the photoelectric sensor is directly opposite the radial outer side surface of the inner cover shaft sleeve of the loading seat at the outer magnetic steel assembly station.

[0153] After adopting the above outer magnetic steel assembly detection module (not shown in the drawing), different distance values can be detected by the photoelectric sensor before and after the outer magnetic steel assembly, so that whether the outer magnetic steel is assembled in place can be reliably judged.

[0154] In implementation, the photoelectric sensor is preferably a laser photoelectric sensor (such as the LR-X series small laser sensor produced by Keyence Company) or a fiber sensor with stronger anti-interference performance. In this way, more reliable assembly quality detection signals can be obtained for a long time.

[0155] The outer magnetic steel assembly mechanism further comprises an outer magnetic steel feeding module, which comprises a vibrating feeding disc, an outer magnetic steel guide output slot and a positioning block.

[0156] The input end of the outer magnetic steel guide output slot is connected with the discharge port of the vibration feeding disc, and the output end of the outer magnetic steel guide output slot is provided with a positioning block, and the upper surface of the positioning block is provided with a U-shaped material receiving groove capable of accommodating a single outer magnetic steel, and the opening end of the U-shaped material receiving groove is communicated with the output end of the outer magnetic steel guide output slot.

[0157] After the above vibration feeding disc is used, a plurality of outer magnetic steels can be batch loaded and fed one by one to the outer magnetic steel guide output slot, and the outer magnetic steel guide output slot guides the outer magnetic steels one by one to the positioning block, so that the vacuum suction nozzle can accurately suck a single outer magnetic steel.

[0158] The outer magnetic steel feeding module further comprises an outer magnetic steel jacking cylinder.

[0159] The bottom of the U-shaped material receiving groove is provided with a through hole, and the through hole is concentrically arranged with the outer magnetic steel.

[0160] The outer magnetic steel jacking cylinder is fixed to the lower surface of the positioning block, and the push rod shaft of the jacking cylinder can exit or penetrate through the through hole and be inserted into the shaft hole of the outer magnetic steel; the outer magnetic steel jacking cylinder is used to jack up the outer magnetic steel in the U-shaped material receiving groove.

[0161] After the above outer magnetic steel jacking cylinder (not shown in the drawing) is arranged, the outer magnetic steel in the U-shaped material receiving groove can be jacked up to the designed height by the outer magnetic steel jacking cylinder, and the to-be-taken magnetic steel is separated from the magnetic steel in the feeding groove to avoid mutual stacking and affect grabbing, thereby ensuring the reliability of suction; at the same time, this design can also simplify the structure of the outer magnetic steel assembly mechanism and reduce the manufacturing cost of the assembly mechanism.

[0162] The outer magnetic steel assembly mechanism further comprises an outer magnetic steel posture adjusting module (not shown in the drawing), which is fixedly arranged along the symmetry center line of the U-shaped material receiving groove of the positioning block to the outside of the positioning block.

[0163] The outer magnetic steel posture adjusting module comprises a U-shaped fork, an adjusting cylinder and a cylinder support.

[0164] The adjusting cylinder is fixedly supported by the cylinder support, and the U-shaped fork is fixedly installed on the push rod of the adjusting cylinder, and the U-shaped opening width of the U-shaped fork matches the outer diameter size of the shaft with the paddle on the outer magnetic steel.

[0165] Under the pushing 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 paddle on the outer magnetic steel along the symmetry center line direction of the U-shaped material receiving groove, so as to adjust the posture of the outer magnetic steel before assembly.

[0166] The above outer magnetic steel posture adjusting module can push the push piece on the outer magnetic steel through the extension of the U-shaped fork, so as to avoid the push piece on the outer magnetic steel being in the positive left or positive right direction (with the symmetry center line of the U-shaped material receiving groove as the reference), thereby avoiding the push piece on the outer magnetic steel being in the positive left or positive right direction after being assembled on the shaft sleeve, which can easily cause hard contact with the transmission structure on the movement core which cooperates with the push piece on the outer magnetic steel in the subsequent movement core assembly station, thereby causing damage or breakage.

[0167] It can be seen that the above outer magnetic steel posture adjusting module can effectively ensure the assembly quality of the outer magnetic steel and the subsequent movement core, thereby better ensuring the assembly quality of the finished watch.

[0168] IV, lower cover gasket assembly mechanism

[0169] The lower cover gasket assembly mechanism comprises:

[0170] The gasket horizontal positioning module has a gasket supporting and positioning flat plate, a gasket insertion site for vertically inserting the gasket is arranged on the gasket supporting and positioning flat plate, a positioning step hole for inserting the inverted gasket and contacting the lower end surface of the gasket is arranged at the gasket insertion site, and the hollow part inside the positioning step hole can be completely penetrated from bottom to top by the inverted lower cover.

[0171] The lower cover conveying and lifting module has a lower cover conveying line and a lower cover lifting cylinder, and the rear side in the advancing direction of the lower cover conveying line is provided with an assembly lifting point position, the lower cover conveying line stops when the lower cover is conveyed to the assembly lifting point position, and the lower cover lifting cylinder is used to lift and penetrate the positioning step hole on the gasket supporting and positioning flat plate of the lower cover at the assembly lifting point position, so that the upper end inner convex edge of the inverted gasket is lap jointed to the connection flange of the lower cover.

[0172] The lower cover adsorption and transfer module has a lower cover adsorption and transfer arm provided with a lower cover vacuum suction nozzle, the lower cover vacuum suction nozzle sucks the top surface of the inverted lower cover, and then transfers to the upper cover opposite to the loading seat at the lower cover packaging and assembly station to release, thereby completing the upper line assembly of the lower cover gasket.

[0173] The lower cover gasket assembly mechanism in the present solution can realize the following more reasonable assembly process and better assembly quality, and the specific assembly process is as follows:

[0174] First, the gasket horizontal positioning module is used to first assemble the gasket and complete accurate positioning;

[0175] Secondly, the lower cover conveying and jacking module jacks the lower cover conveyed into position into the positioning step hole on the positioning flat plate on the seal ring supporting and positioning flat plate in the seal ring laying and positioning module from below to above; because of the structural feature "the hollow part inside the positioning step hole is used for allowing the lower cover to completely penetrate from below to above" (that is, there is a gap between the inner side of the positioning step hole and the outer side of the shell sealing surface of the lower cover), the outer side of the lower cover in the circumferential direction can be effectively prevented from being scraped with the seal ring supporting and positioning flat plate, and the appearance of the lower cover is better protected;

[0176] Finally, after the lower cover is jacked into position, the lower cover and the seal ring can be sucked and transferred by the lower cover suction and transfer module, and the online assembly of the two is completed.

[0177] As can be seen from the above, compared with the prior art, the lower cover and seal ring assembly mechanism has the advantages that:

[0178] The lower cover and seal ring assembly mechanism has a relatively simple structure and low manufacturing cost; at the same time, the assembly process between the lower cover and the seal ring can be made more reasonable, the seal ring is positioned first, then the lower cover is moved into position and jacked to sleeve the seal ring, the combination between the seal ring and the lower cover is realized, the lower cover suction and transfer module can install the two assembly parts at one time, and the assembly quality of the lower cover and seal ring is better ensured.

[0179] In implementation, the top edge of the positioning step hole has a chamfer. After the chamfer is provided, the precision required for the alignment of the seal ring into the seal ring supporting and positioning flat plate can be reduced, and the accuracy of the seal ring into the seal ring supporting and positioning flat plate can be improved.

[0180] A blocking block above the lower cover conveying line is arranged at the position of the assembly jacking point.

[0181] The arrangement of the blocking block can prevent the lower cover on the lower cover conveying line from continuing to move, so as to realize accurate positioning and reduce the control difficulty of controlling the displacement of the lower cover by the lower cover conveying line.

[0182] A positioning hole is arranged on the periphery surface of the seal ring supporting and positioning flat plate outside the upper end of the positioning step hole.

[0183] The arrangement of the positioning hole can cooperate with the corresponding guide column (that is, the taper cylinder type section in the short side clamping column and the long side clamping column in the seal ring moving and taking structure) to realize accurate positioning and ensure that the seal ring can be accurately fed.

[0184] The seal ring supporting and positioning flat plate is in a long strip shape and mirror-symmetrically provided with the seal ring insertion site at the positions of the two ends in the length direction of the seal ring supporting and positioning flat plate.

[0185] The sealing ring lying positioning module further comprises a 180-degree rotating cylinder for sealing ring, and the sealing ring supporting and positioning flat plate is fixed on the rotating table of the 180-degree rotating cylinder for sealing ring, and the midpoint of the length direction of the sealing ring supporting and positioning flat plate coincides with the axis of the rotating table of the 180-degree rotating cylinder for sealing ring;

[0186] The 0-degree position of the rotating table of the 180-degree rotating cylinder for sealing ring constitutes a sealing ring feeding position, and the 180-degree position is directly above the assembly jacking position.

[0187] In this way, the assembly pace of the sealing ring feeding and the assembly between the sealing ring and the lower cover in unit time can be improved, and the assembly speed between the sealing ring and the lower cover can be accelerated.

[0188] The lower cover suction and transfer arm further comprises a lifting cylinder, a 180-degree rotating cylinder for lower cover and a long strip-shaped supporting flat plate; the push rod of the lifting cylinder is downward and vertically fixedly installed on the lower side of the top frame of the lower cover sealing ring assembly gantry;

[0189] The lower cover suction and transfer arm further comprises a lifting cylinder, a 180-degree rotating cylinder for lower cover and a long strip-shaped supporting flat plate; the push rod of the lifting cylinder is downward and vertically fixedly installed on the lower side of the top frame of the lower cover sealing ring assembly gantry;

[0190] The 0-degree position of the rotating table of the 180-degree rotating cylinder for sealing ring constitutes a sealing ring feeding position, and the 180-degree position is directly above the assembly jacking position.

[0191] In this way, the assembly pace of the sealing ring feeding and the assembly between the sealing ring and the lower cover in unit time can be improved, and the assembly speed between the sealing ring and the lower cover can be accelerated.

[0192] The length direction of the lower cover conveyed on the lower cover conveying line is consistent with the conveying direction of the conveying belt;

[0193] The lower cover posture detection and adjustment unit is arranged on the front side in the advancing direction of the lower cover conveying line and forms a lower cover posture detection and adjustment position.

[0194] The lower cover posture detection and adjustment unit comprises a controllable stop block, an image acquisition sensor, a posture detection controller and a jacking rotating cylinder assembly.

[0195] The controllable block is vertically liftable and can be used to block or pass the lower cover conveyed on the lower cover conveying line;

[0196] The image acquisition sensor is fixedly installed on the side or directly above the lower cover conveying line, and the camera of the image acquisition sensor is used to shoot a video signal of the long and short protrusions on the shell sealing surface of the lower cover to the posture detection controller. The posture detection controller is used to determine the front and back sequence of the long and short protrusions on the shell sealing surface of the lower cover in the conveying direction of the lower cover conveying line.

[0197] The jacking rotary cylinder assembly includes a vertical cylinder with the push rod upward and a 180-degree rotary cylinder fixedly installed on the upper end of the push rod. A long strip-shaped top rotating block is fixedly installed on the rotary table of the 180-degree rotary cylinder. The shape and size of the top rotating block match the inner top shape of the lower cover.

[0198] The working principle of the above-mentioned lower cover posture detection and adjustment unit is as follows:

[0199] Firstly, the controllable block is used to block the front side of the lower cover on the conveying belt;

[0200] Next, the image acquisition sensor (industrial camera, such as light, which can increase the light compensation of the illuminating lamp; not shown in the drawing) shoots the sequence of the long and short protrusions on the shell sealing surface of the lower cover in the conveying direction of the conveying belt; and the orientation of the long and short supports on the movement mechanism is determined (the long protrusion needs to cooperate with the long support, and the short protrusion needs to cooperate with the short support);

[0201] Subsequently, when the long protrusion / short protrusion is not one-to-one opposite to the long support / short support, the posture detection controller sends a control signal to the jacking rotary cylinder assembly to rotate 180 degrees to adjust the posture;

[0202] Finally, when the long protrusion / short protrusion is not one-to-one opposite to the long support / short support, the controllable block retreats and allows the lower cover on the conveying belt to pass.

[0203] As can be seen from the above, the setting of the lower cover posture detection and adjustment unit of the present scheme can automatically complete the detection and adjustment of the posture of the lower cover without manual intervention to determine and adjust whether the long protrusion / short protrusion is opposite to the long support / short support, thereby significantly improving the intelligence and correctness of the lower cover assembly.

[0204] The lower cover gasket assembly mechanism further comprises a gasket feeding structure and a gasket moving and taking structure.

[0205] V. Gasket feeding mechanism

[0206] The gasket feeding mechanism comprises a cantilever, a cantilever supporting structure and an upper line gasket in-place detection module.

[0207] The rear end of the cantilever is fixedly installed on the cantilever supporting structure; the front section of the cantilever has a suspended seal ring conveying belt assembly, and a plurality of seal rings can be placed side by side on the conveying belt of the seal ring conveying belt assembly and can be output one by one to the front end of the conveying belt under the driving of the synchronous belt driving motor.

[0208] The upper line seal ring in place detection module is used for detecting whether there is a seal ring at the front end of the conveying belt to be taken and outputting a detection signal.

[0209] The working principle of the seal ring feeding mechanism is:

[0210] When the seal ring conveying belt to be taken detects a seal ring, the synchronous belt driving motor stops driving, and the seal ring state at this position is that it can be clamped and moved by the seal ring moving structure.

[0211] When the upper line seal ring in place detection module does not detect a seal ring for less than a preset time, the synchronous belt driving motor drives the conveying belt to continuously convey forward and replenish the front end of the conveying belt to be taken.

[0212] When the upper line seal ring in place detection module does not detect a seal ring for more than or equal to a preset time, a lack of material signal is output to remind workers to replenish in time.

[0213] Compared with the prior art, the seal ring feeding mechanism has the advantages that:

[0214] The conveying belt of the seal ring conveying belt assembly on the cantilever can hang and store a plurality of seal rings through its length, and can send out the seal rings one by one to the front end of the conveying belt to be taken. Therefore, the present application can realize batch feeding and feeding of seal rings, and better solves the difficult problem existing in the industry.

[0215] When implemented, a stopper is preferably fixedly installed at the front end of the conveying belt to be taken, and the stopper is used for resisting and limiting the seal ring to ensure that the seal ring can be simply and reliably positioned at the stopper position and receive the detection of the upper line seal ring in place detection module.

[0216] When implemented, when the number of cantilevers is single, the synchronous belt driving motor can be directly fixedly installed on the side support plate frame of the seal ring conveying belt assembly, and the output shaft of the synchronous belt driving motor is drivingly connected (connected through a belt or a gear meshing connection) between the shafts of the driving wheels in the seal ring conveying belt assembly.

[0217] When implemented, the upper line seal ring in place detection module can use a photoelectric sensor or a proximity sensor to generate a signal change within a specified time (measured according to the conveying belt moving speed and distance) to determine whether there is a seal ring at the position.

[0218] The cantilever support structure comprises a controllable turntable and a turntable support; the rear side of the controllable turntable is rotatably mounted on the turntable support, and a turntable driving motor for driving the controllable turntable to rotate is fixedly mounted on the turntable support;

[0219] At least two cantilevers are uniformly and vertically fixedly mounted on the front end surface of the controllable turntable along the circumference thereof, and the cantilever rotating to the lowermost side among all the cantilevers is a discharging arm.

[0220] The cantilever support structure has the following advantages:

[0221] 1. The number of cantilevers and the number of gaskets loaded on the cantilevers can be doubled by the controllable turntable and the at least two cantilevers fixedly mounted thereon, so that the gaskets can be continuously and reliably supplied and assembled for a longer time without reloading.

[0222] 2. The discharging arm can be used to quickly supplement the material on the cantilever with insufficient material when the discharging arm discharges, so that the production rhythm of gasket assembly can be effectively ensured without stopping the machine.

[0223] The gasket feeding mechanism further comprises a motor jacking cylinder, which is fixedly mounted on the turntable support below the controllable turntable through a support;

[0224] The push rod of the motor jacking cylinder faces upwards, and the synchronous belt driving motor is fixedly mounted on the push rod; the output gear of the synchronous belt driving motor can be connected with the driving gear arranged on the lower side of the conveying belt of the discharging arm under the driving of the motor jacking cylinder.

[0225] The structure comprising the motor jacking cylinder can be used to connect and drive the conveying belt of each discharging arm by using a synchronous belt driving motor;

[0226] In this way, the driving structure of the conveying belt of the discharging arm can be simplified, the cost of manufacturing the gasket feeding mechanism can be saved, and the comprehensive use effect and economic benefit are better.

[0227] The lower part of the turntable support has a rectangular support frame;

[0228] One pair of vertical frame edges of the rectangular support frame extends upwards to form a pair of vertical support rods, at least two horizontal reinforcing connecting rods are fixedly and vertically connected between the upper sections of the pair of vertical support rods, and the upper sections of the pair of vertical support rods constitute mounting portions for mounting the controllable turntable.

[0229] The above structure has the following advantages:

[0230] 1、The fixed connection structure of the pair of vertical supporting rods and the transverse reinforcing connecting rod can improve the overall connection reliability and realize reliable support of the controllable turntable.

[0231] 2、The lower part of the turntable support has a rectangular body type support frame, so that the internal or top space of the rectangular support frame can be used to load the control host of the assembly line, realizing full use of space, lower center of gravity and more stable bottom. At the same time, the rectangular body type support frame can also make the bottom of the turntable support have a larger contact area with the ground, thereby helping to obtain more stable turntable support effect.

[0232] A pair of inclined reinforcing support rods are fixedly installed between the upper section of the pair of vertical supporting rods and the top of the rectangular body type support frame.

[0233] A pair of inclined installation rods are fixedly installed at the middle position of the length direction of the pair of inclined reinforcing support rods, and the upper end position of the pair of inclined installation rods is fixedly installed with the upper line sealing ring in place detection module.

[0234] After the pair of vertical supporting rods are supported by the pair of inclined reinforcing support rods, the pair of vertical supporting rods, the inclined reinforcing support rods and the top of the rectangular body type support frame form a triangular stable connection structure, ensuring that the turntable support can be durable, firm and reliable.

[0235] In addition, the pair of inclined installation rods are also relatively simple to install, and the upper line sealing ring in place detection module at the upper end position of the pair of inclined installation rods has a simple and reliable support structure and is at an ideal detection position.

[0236] The upper line sealing ring in place detection module is a pair of light emitting and receiving sensors opposite the sealing ring side edge of the front end of the conveying belt.

[0237] In implementation, the pair of light emitting and receiving sensors can be a pair of laser sensors or optical fiber sensors.

[0238] The sealing ring feeding mechanism further includes a sealing ring moving and taking structure, which is used to clamp and transfer a single sealing ring at the front end of the conveying belt to the lower cover sealing ring assembly mechanism.

[0239] VI、Sealing ring moving and taking structure

[0240] The sealing ring moving and taking structure includes a robot with a clamping jaw.

[0241] The robot is an industrial six-axis robot, and the clamping jaw is fixedly installed on the execution hand of the industrial six-axis robot.

[0242] The clamping jaw comprises a rectangular clamping plate, one of the plate surfaces of the clamping plate is a fixed surface of an execution hand of an industrial six-axis robot, and the other plate surface is a clamping surface;

[0243] On one of the long edges of the clamping surface, an outwardly protruding long edge clamping column is fixedly installed, and on the other long edge, a transversely movable clamping block that can reciprocate along the width direction of the clamping plate is installed, a transverse clamping cylinder is fixedly installed on the fixed surface of the clamping plate, and the transversely movable clamping block is fixedly installed on the push rod of the transverse clamping cylinder;

[0244] On one of the short edges of the clamping surface, an outwardly protruding short edge clamping column is fixedly installed, and on the other short edge, a vertically movable clamping block that can reciprocate along the length direction of the clamping plate is installed, a vertical clamping cylinder is fixedly installed on the lower side of the fixed surface of the clamping plate, and the vertically movable clamping block is fixedly installed on the push rod of the vertical clamping cylinder;

[0245] The rated thrust of the vertical clamping cylinder is greater than the rated thrust of the transverse clamping cylinder.

[0246] The action process of the seal ring moving and taking structure in the scheme is as follows:

[0247] Firstly, the execution hand drives the clamping plate to vertically face and approach the seal ring;

[0248] Secondly, the long edge clamping column, the transversely movable clamping block, the short edge clamping column and the vertically movable clamping block arranged around the clamping plate surround the hanging seal ring;

[0249] Next, the transverse clamping cylinder drives the transversely movable clamping block to realize transverse clamping of the seal ring with the long edge clamping column, and provides a transverse clamping action to preliminarily clamp the seal ring;

[0250] And because the rated thrust of the vertical clamping cylinder is greater than the rated thrust of the transverse clamping cylinder, the vertical clamping cylinder can drive the vertically movable clamping block to continue moving upward, so that the upper short edge of the seal ring can be suspended from the cantilever until the vertical clamping cylinder continuously drives to the top short edge of the seal ring being in contact with the short edge clamping column, that is, vertical clamping is realized.

[0251] Finally, the industrial six-axis robot can place the clamped seal ring on the predetermined position to complete the seal ring feeding.

[0252] As can be seen from the above, the seal ring moving and taking structure in the scheme has the following advantages:

[0253] 1. The seal ring taking structure and process are ingenious, and can achieve better moving and taking and protection effects

[0254] The seal ring moving and taking structure in the scheme adopts ingenious structural design to achieve:

[0255] First, the cantilever suspension sealing ring can be separated from the cantilever and suspended, so as to avoid the impact or friction between the sealing ring and the cantilever during the sealing ring taking process, avoid the posture change during the sealing ring taking process, and better protect the integrity of the sealing ring and the cantilever structure, and have better protection effect.

[0256] 2、The above clamping jaw structure can clamp the sealing ring around the sealing ring, so as to obtain reliable clamping effect and ensure reliable feeding of the sealing ring.

[0257] Two long edge clamping columns are arranged on the long side of the clamping plate along the same straight line direction parallel to the long side; two short edge clamping columns are arranged on the short side of the clamping plate along the same straight line direction parallel to the short side.

[0258] The above pair of long edge clamping columns and short edge clamping columns can form multi-point contact connection with the long side and short side of the sealing ring, further improving the reliability of the sealing ring clamping.

[0259] The long edge clamping column and the short edge clamping column each have a two-section structure with a cylindrical section and a conical section in the axial direction; the cylindrical section is close to the clamping section of the clamping plate and has a length greater than the thickness of the sealing ring; the conical section gradually reduces the outer diameter away from the cylindrical section in the axial direction.

[0260] The above long edge clamping column and short edge clamping column have the advantages of simple structure and easy processing.

[0261] At the same time, the cylindrical section of the long edge clamping column and the short edge clamping column can be used to clamp the sealing ring; the conical section of the long edge clamping column and the short edge clamping column can be matched with the positioning step hole of the sealing ring feeding tool (i.e. the sealing ring support positioning plate in the sealing ring flat positioning module) to ensure accurate feeding of the sealing ring. Therefore, it has better practical effect.

[0262] During implementation, the long edge clamping column and the short edge clamping column are preferably fastened and connected with the clamping plate through threads.

[0263] The inner side surface of the cylindrical section of the long edge clamping column and the short edge clamping column in the circumferential direction is provided with a limiting pit for the side edge of the sealing ring.

[0264] The structure of the above limiting pit can limit the position during the sealing ring taking process, so as to more effectively avoid the displacement or even falling of the sealing ring caused by extrusion during the grabbing process, and improve the reliability of the sealing ring grabbing and transferring.

[0265] The area of the plate surface of the clamping plate, which is located outside the execution hand, the horizontal clamping cylinder and the vertical clamping cylinder of the industrial six-axis robot, has a hollow structure.

[0266] The 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.

[0267] The above is only a preferred embodiment of the present application, it should be noted that for those skilled in the art without departing from the technical solutions, several modified and improved technical solutions should also be considered to fall within the scope of the present application.

Claims

1. External magnet assembly mechanism, including external magnet transfer arm and vacuum nozzle; The external magnet transfer arm is fixedly installed above the annular guide rail of the diaphragm gas meter assembly line by a bracket. The vacuum nozzle is installed on the actuator of the external magnet transfer arm. The vacuum nozzle is used to adsorb a single external magnet and, driven by the external magnet transfer arm, is fitted onto the bushing of the upper cover. Its features are: It also includes a rotating module, which is fixedly mounted on the actuator hand of the external magnet transfer arm. The rotating module has a rotating part that can rotate in a vertical plane and achieve angular positioning at 0 degrees, -90 degrees and -180 degrees. The vacuum nozzle is fixedly mounted on the rotating part. The actuator hand of the external magnet transfer arm, the rotating module and its rotating part and the vacuum nozzle can all extend into the internal space of the upper cover of the diaphragm gas meter. It also includes an external magnet feeding module, which includes a vibrating feeding plate, an external magnet guiding output groove, and a positioning block; The input end of the external magnet guide output channel is connected to the discharge port of the vibrating feeding plate. The output end of the external magnet guide output channel is provided with a positioning block. The upper surface of the positioning block has a U-shaped receiving groove that can accommodate a single external magnet. The opening end of the U-shaped receiving groove is connected to the output end of the external magnet guide output channel. The external magnet feeding module also includes an external magnet lifting cylinder; The bottom of the U-shaped receiving trough is provided with a perforation, which is concentric with the outer magnet. The outer magnet lifting cylinder is fixed to the lower surface of the positioning block, and the push rod shaft of the lifting cylinder can exit or pass through the through hole and be inserted into the shaft hole of the outer magnet; the outer magnet lifting cylinder is used to lift the outer magnet located in the U-shaped receiving groove. It also includes an external magnet attitude adjustment module, which is fixedly installed along the symmetrical center line of the U-shaped receiving groove of the positioning block to the outside of the positioning block; The external magnet attitude adjustment module includes a U-shaped fork, an adjustment cylinder, and a cylinder bracket; The adjusting cylinder is fixedly supported by the cylinder bracket. The U-shaped fork is fixedly installed on the push rod of the adjusting cylinder. The U-shaped opening width of the U-shaped fork matches the outer diameter of the shaft with the paddle on the outer magnet. Under the push of the adjustment cylinder, the two end faces of the U-shaped opening of the U-shaped fork are used to push the paddle on the outer magnet along the symmetrical center line of the U-shaped receiving groove, so as to adjust the posture of the outer magnet before assembly. The rotating module is a servo motor or a rotary cylinder.

2. The external magnet assembly mechanism according to claim 1, characterized in that: The external magnet transfer arm includes a gantry bracket, guide rail, slider, strip mounting plate, lifting cylinder and lead screw module assembly; The top of the gantry support has a horizontally arranged rectangular frame, which spans across the ring guide rail of the diaphragm gas meter assembly line. The guide rail and lead screw module assembly are fixedly installed on the upper surface of the two parallel sides of the rectangular frame that are 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 through the strip mounting plate; The push rod of the lifting cylinder faces downward and is fixedly installed on the lower surface of the strip mounting plate. The push rod of the lifting cylinder constitutes the actuator of the external magnet transfer arm.

3. The external magnet assembly mechanism according to claim 2, characterized in that: It also includes an external magnet assembly detection module, which includes a photoelectric sensor. The photoelectric sensor is fixedly installed on the gantry bracket, and the probe of the photoelectric sensor is directly opposite the radial outer side of the inner bushing of the upper cover of the loading seat at the external magnet assembly station.

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