CN210587982U - Pointer disc positioning mechanism of diaphragm gas meter - Google Patents

Pointer disc positioning mechanism of diaphragm gas meter Download PDF

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Publication number
CN210587982U
CN210587982U CN201921753992.XU CN201921753992U CN210587982U CN 210587982 U CN210587982 U CN 210587982U CN 201921753992 U CN201921753992 U CN 201921753992U CN 210587982 U CN210587982 U CN 210587982U
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China
Prior art keywords
flat plate
pointer
gas meter
stepping motor
lifting
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CN201921753992.XU
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Chinese (zh)
Inventor
寇明林
曾勇
周强
刘春建
肖楠
陈又
吕东红
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Chongqing Qianwei Watch Co Ltd
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Chongqing Qianwei Technologies Group Co Ltd
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Abstract

The utility model discloses a pointer dish positioning mechanism of diaphragm type gas table, its characterized in that: comprises a bracket for a cylinder body, a power cylinder for lifting, a mounting flat plate, a stepping motor and a rotating piece; the bottom of the cylinder body support is fixedly arranged on a rocker arm assembly table of the membrane type gas meter; the power cylinder for lifting is vertically and fixedly arranged on the bracket for the cylinder body, and a push rod of the power cylinder for lifting faces downwards; the whole installation flat plate is of a flat structure fixedly installed at the lower end of a push rod of the power cylinder for lifting; the stepping motor is fixedly arranged on the installation flat plate, and an output shaft of the stepping motor faces downwards and penetrates through the installation flat plate; and a rotating part is fixedly arranged on the length section of the output shaft of the stepping motor below the mounting flat plate and is used for driving an eccentric column on the pointer disc to rotate. The utility model discloses the pointer dish of diaphragm type gas table rotates positioning mechanism can help the quick rotational positioning of pointer dish (pointer dish), is accomplishing rocking arm assembly back, can directly assemble the connecting rod, and the help improves the assembly efficiency of connecting rod.

Description

Pointer disc positioning mechanism of diaphragm gas meter
Technical Field
The utility model belongs to diaphragm type gas table field, concretely relates to pointer dish positioning mechanism of diaphragm type gas table.
Background
The diaphragm gas meter mainly comprises a metering part (comprising two metering boxes respectively internally provided with flexible diaphragms), a transmission part (comprising a diaphragm plate, a folded plate, a vertical shaft, a rocker arm, a connecting rod, a pointer disc, a shifting fork and a valve cover), a counting part and a shell, wherein the rest parts except the shell are collectively called as a core of the diaphragm gas meter. Patent documents CN201273832Y and CN201463953U show the structure of a diaphragm gas meter.
The working principle of the membrane type gas meter is as follows: a diaphragm (typically made of elastomer) is sealingly mounted at the centerline within each metering box and separates the interior of the metering box into two metering chambers. After entering the gas meter, the gas enters the two metering gas chambers of each metering box alternately, so that the diaphragm (and the diaphragm plate wrapped and clamped on the diaphragm) makes reciprocating motion, and then linkage is realized, namely the diaphragm plate drives the folded plate (the outer side end) and the folded plate (the sleeve part at the inner side) drives the vertical shaft, the vertical shaft drives the rocker arm and the rocker arm drives the connecting rod, the connecting rod drives the pointer disc, and the cam on the pointer disc drives the shifting fork to make the valve cover make reciprocating motion on the valve grid and alternately open the gas inlets of the two metering gas chambers of each metering box (the reciprocating motion of the valve grid can make the gas enter the two metering gas chambers of each metering box alternately). Therefore, the gas in the volumes of the two metering boxes (four metering air chambers) can be discharged by one-time circulation, meanwhile, the pointer disc rotates and drives the gear of the counter to rotate, and the counter displays the volume of the discharged gas.
In the prior art, the technical scheme with the publication number of CN107891269A completely discloses an assembly method and an assembly device of a gas meter movement, but the technical scheme still has the following defects:
the technical scheme is that the assembly of the connecting rods is that a six-axis manipulator assembly mechanism assembles a left connecting rod and a right connecting rod on a machine core body, and the left connecting rod and the right connecting rod are respectively connected with a double rocker arm and a dial (an eccentric column on a pointer disc) to form a finished movement transmission chain. But actually, after the double-rocker arm is assembled, the position of the eccentric column on the pointer plate is relatively disordered, which is not beneficial to the automatic and quick assembly of the connecting rod. This solution does not give a solution to this deficiency.
Based on this, the applicant considers to design a pointer plate positioning mechanism of a membrane type gas meter, which helps to improve the assembly efficiency of a connecting rod.
Disclosure of Invention
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: provided is a pointer disc positioning mechanism of a membrane type gas meter, which helps to improve the assembly efficiency of a connecting rod.
In order to solve the technical problem, the utility model discloses a following technical scheme:
pointer dish positioning mechanism of diaphragm type gas table, its characterized in that: comprises a bracket for a cylinder body, a power cylinder for lifting, a mounting flat plate, a stepping motor and a rotating piece;
the bottom of the cylinder body support is fixedly arranged on a rocker arm assembly table of the diaphragm gas meter;
the power cylinder for lifting is vertically and fixedly arranged on the bracket for the cylinder body, and a push rod of the power cylinder for lifting faces downwards;
the whole installation flat plate is of a flat structure fixedly installed at the lower end of a push rod of the power cylinder for lifting;
the stepping motor is fixedly arranged on the installation flat plate, and an output shaft of the stepping motor faces downwards and penetrates through the installation flat plate;
the output shaft of the stepping motor is fixedly provided with the rotating part on the length section below the installation flat plate, and the rotating part is used for driving the eccentric column on the pointer disc to rotate.
The operation process of the pointer disc positioning mechanism of the diaphragm gas meter in the technical scheme is as follows:
firstly, the power cylinder for lifting can drive the installation flat plate to realize vertical lifting:
wherein, drive the dull and stereotyped decline back of installation with the power cylinder in going up and down: the rotating piece and the eccentric columns on the pointer disc can be driven to rotate through the stepping motor, so that the eccentric columns on the upper surface of the pointer disc and the double vertical shafts are equal in center distance and the stepping motor stops when the shortest distance is achieved, and the pointer disc is positioned; after the pointer disc is positioned, a connecting rod can be directly assembled between the eccentric column of the pointer disc and the outer end of the rocker arm, so that the assembling efficiency and the assembling precision of the connecting rod are improved;
wherein, drive the dull and stereotyped back that rises of installation with the power cylinder in going up and down: the rotating piece is far away from the membrane type gas meter core on the rocker arm assembly table, so that the membrane type gas meter core on a conveying device (such as a rotary table or a conveying belt) can smoothly pass through.
It can be seen from above that, the pointer dish positioning mechanism of diaphragm type gas table among this technical scheme can help the quick rotational positioning of pointer dish (pointer dish), and then does benefit to and can directly assemble the connecting rod after accomplishing the rocking arm assembly, and the help improves the assembly efficiency of connecting rod.
Drawings
Fig. 1 is a schematic structural view of a rocker arm assembling mechanism according to the present invention.
Fig. 2 is a schematic structural view showing a rocker arm press-fitting portion and a rocker arm transfer mechanism in the rocker arm fitting mechanism of fig. 1.
Fig. 3 is a schematic structural view showing a rocker arm press-fitting portion in the rocker arm fitting mechanism of fig. 1.
Fig. 4 is an enlarged view of fig. 3 at I.
Fig. 5 is a schematic structural view (another view different from fig. 3) showing a rocker arm press-fitting portion in the rocker arm fitting mechanism of fig. 1.
Fig. 6 is an enlarged view of fig. 5 at II.
Fig. 7 is a schematic structural view of the pointer plate rotation positioning mechanism of the present invention.
FIG. 8 is a top view of a conventional diaphragm gas meter movement.
Labeled as:
diaphragm type gas table core: 10 rocker arms (101 is connected with a sleeve for a vertical shaft, 102 is connected with a convex column for a connecting rod, 103 is adsorbed), 11 vertical shafts, 12 metering boxes, 13 pointer disks (131 eccentric columns), 14 connecting rods and 15 shifting forks;
2, a rocker arm assembling mechanism: 20 servo motors, 21 torsion columns (211 torsion bosses), 22 gantry-type supports, 23 compression power cylinders, 24 press-fitting lifting tables, rocker press-fitting modules (251 receiving power cylinders for rockers, 252 double rockers receiving positioning plates (2521 step columns, 2522 jacks)), torsion elastic buffer structures (261 input connecting rods, 262 connecting sleeves, 263 pressure springs), 27 rocker assembling tables and 28 turntables;
3, a rocker arm transfer mechanism: 30 double-rocker transplanting plates (a dropping section for a 301 sleeve and a dropping section for a 302 rod connecting section)), 31 a rodless cylinder (311 a moving platform) for conveying, 32 a vibration disc and 33 rocker material taking manipulators;
4 pointer dish rotation positioning mechanism: 41 cylinder body support, 42 lifting power cylinder (421 limited block), 43 installation flat plate, 44 stepping motor, 45 rotating rod, 46 blocking column, 47 blocking block.
Detailed Description
The present invention will be described in further detail with reference to the drawings of a rocker arm assembly mechanism of a diaphragm gas meter.
As shown in fig. 1 to 7: the rocker arm assembling mechanism of the diaphragm gas meter comprises a gantry type bracket 22, a power cylinder 23 for pressing and a lifting table 24 for pressing and loading a rocker arm pressing module; the vertical power cylinder 23 for pressing is fixedly installed on the top plate of the gantry type support 22, the push rod of the power cylinder 23 for pressing faces downwards and is fixedly provided with the lifting platform 24 for press mounting, and the rocker press mounting module is used for press mounting double rockers onto the double vertical shafts 11;
the rocker press-mounting module comprises a power cylinder 251 for receiving a rocker and a double-rocker receiving positioning plate 252, the power cylinder 251 for receiving the rocker is vertically and fixedly installed on the lifting table 24 for press-mounting, and a push rod of the power cylinder 251 for receiving the rocker faces downwards and is fixedly provided with the double-rocker receiving positioning plate 252;
the double rocker arm receiving and positioning plate 252 is a flat plate, the lower surface of the double rocker arm receiving and positioning plate 252 is provided with a pair of step columns 2521 and a pair of insertion holes 2522, the pair of step columns 2521 are of a double-step cylindrical structure with a small lower part and a large upper part, the axes of the pair of step columns 2521 can be coincided with the axis of a double vertical shaft 11 on a core located right below, the lower sections of the pair of step columns 2521 are used for being sleeved and connected with sleeves for two connecting vertical shafts of a double rocker arm to be press-fitted, and the pair of insertion holes 2522 are used for being inserted and connected with the two connecting rods 14 of the.
The pair of step columns 2521 and the pair of insertion holes 2522 in the rocker arm assembly mechanism of the diaphragm gas meter according to the present embodiment enable the dual rocker arms to be mounted therein to be restrained and in a state to be press-fitted (as known to those skilled in the art, the dual rocker arms to be press-fitted are vertically overlapped and are in an X-shaped cross shape that is bilaterally symmetrical in a top view direction).
The double rocker arm bearing positioning plate 252 in the technical scheme can be matched with the power cylinder 251 for bearing rocker arms and the power cylinder 23 for pressing to realize multiple functions:
a. the power cylinder 251 for the receiving rocker arm pushes the push rod to press downwards so that the double rocker arms (on the double rocker arm transplanting plate 30) are arranged to the pair of step columns 2521 and the pair of insertion holes 2522 for limiting and are in a state to be pressed, namely, the function of receiving the double rocker arms and keeping the double rocker arms positioned before being arranged is achieved;
b. the push rod of the power cylinder 23 for pressing is pressed downwards, so that the lower end surface of the upper section of the pair of step columns 2521 on the double-rocker receiving and positioning plate 252 presses the two sleeves for the connecting vertical shafts of the double rockers, and the two sleeves for the connecting vertical shafts of the double rockers can be pressed and mounted on the knurled section at the top of the double vertical shaft 11, namely, the function of completing pressing and mounting of the double rockers is achieved.
Therefore, the structure of the double rocker arm bearing positioning plate 252 in the technical scheme is more ingenious, the functions are richer, the rocker arm assembling mechanism of the whole membrane type gas meter is simple, convenient and reliable to operate and control, the structure is more simplified and compact, and the double rocker arm bearing positioning plate is more suitable for being arranged and used on site.
The press-fitting module further comprises a pair of servo motors and a pair of torsion columns 21; the pair of servo motors are fixedly arranged on the lifting platform 24 for press mounting side by side; the pair of torsion columns 21 are integrally of a cylindrical structure which corresponds to the pair of step columns 2521 one by one and has coincident axial leads, the upper ends of the pair of torsion columns 21 are in transmission connection with the output shafts of the pair of servo motors one by one through transmission connecting pieces, the lower sections of the pair of torsion columns 21 penetrate through the pair of step columns 2521, and the lower end surfaces of the pair of torsion columns 21 are provided with downward convex torsion protrusions 211.
In practice, the torsion protrusions 211 at the lower ends of the pair of torsion columns 21 are inserted into the torsion grooves formed on the top end surfaces of the twin vertical shafts 11 to twist the vertical shafts 11.
By adopting the press-fitting module comprising the pair of servo motors and the pair of torsion columns 21, the rotary positioning of the double vertical shafts 11 can be realized, and finally, in the press-fitting process of the double rocker arms, the diaphragm in each metering box 12 is always positioned at the center line of the thickness direction of the metering box 12, so that the press-fitting precision of the rocker arms and the vertical shafts 11 is better ensured, and the metering precision is improved. The realization principle of specifically improving the metering precision is as follows:
as known to those skilled in the art, the servo motors are three closed-loop controls including a current loop, a speed loop and a position loop, which respectively feed back the angular acceleration, the angular velocity and the rotational position of the motor operation. The control circuit of the servo motor controls the driving current of each phase of the motor through the feedback of the current loop, the speed loop and the position loop, and the speed and the position of the servo motor can accurately operate according to the preset operation. The specific operation is as follows:
the vertical shaft 11 is driven to rotate, and the rotation angle values of two dead points are obtained:
the two servo motors drive the double vertical shafts 11 to rotate clockwise and anticlockwise, and the outer side ends of the folded plates fixedly arranged on the double vertical shafts 11 drive the membrane plates to collide with the two side walls of the metering box 12 and output rotation angle values of two dead points to control circuits of the two servo motors;
obtaining a positioning angle value, and performing rotary positioning:
the control circuit in the two servo motors divides the positive difference value of the rotation angle values of the two dead points by 2 to obtain a positioning angle value, and the two servo motors drive the double vertical shafts 11 to rotate to the positioning angle value, so that the diaphragm in each metering box 12 is positioned at the center line of the thickness direction of the metering box 12.
Therefore, the deflection of the double rocker arms easily generated in the press mounting process on the vertical shaft 11 can be avoided, the assembly precision of the double rocker arms is better ensured, the assembly can be more accurately completed according to the designed angle at the included angle between the double rocker arms and the folded plate, the situation that the diaphragm reversing moment is not corresponding to the operation dead point position of the pointer disk connecting rod mechanism is avoided, the kinetic energy loss caused by the fact that the kinetic energy of the gas pressure driving diaphragm cannot drive the pointer disk 13 is effectively avoided or reduced, and the metering precision of the diaphragm gas meter can be finally improved.
Meanwhile, the overall structure of the press-fitting module can be more compact by adopting the structural design that the pair of torsion columns 21 penetrate through the pair of stepped columns 2521. And after the torsion column 21 drives the vertical shaft 11 to complete steering positioning, the double rocker arms can be quickly pressed without drawing out the torsion column 21, so that the rotation positioning of the vertical shaft 11 and the pressing operation of the double rocker arms can be quickly connected, and the assembly method can be completed more quickly and efficiently.
Wherein, the protrusion 211 for twisting is a cross, inner hexagonal or outer hexagonal convex structure.
Thus, the contact area between the torsion protrusion 211 and the torsion groove is larger, the contact is tighter, and the torsion reliability and the torsion precision are better ensured.
Wherein, the transmission connecting piece between the upper end of each torsion column 21 and the output shaft of the corresponding servo motor is a coaxial transmission connecting rod.
The transmission connecting piece is simple in structure and easy to manufacture and assemble.
Wherein, the transmission connecting piece between the upper end of each torsion column 21 and the output shaft of the corresponding servo motor is two universal joints and a middle transmission rod connected between the two universal joints.
The transmission connecting piece can be better adapted to the space structure of a site and has the advantage of reliable transmission.
The upper end of each torsion column 21 is connected with an elastic buffer structure for torsion, and the elastic buffer structure for torsion comprises an input connecting rod 261, a connecting sleeve 262 and a pressure spring; the upper end of the input connecting rod 261 is used for being connected with an output shaft of a servo motor, the lower section of the input connecting rod 261 enters the connecting sleeve 262 through an opening at the upper end of the connecting sleeve 262 and is inserted into the connecting sleeve 262, the outer side surface of the lower section of the input connecting rod 261 is provided with two convex columns which protrude outwards along the radial direction and are uniformly distributed in the circumferential direction, the side wall of the connecting sleeve 262 is provided with two strip-shaped holes for the two convex columns to penetrate through and keep contact connection, and the length directions of the two strip-shaped holes are consistent with the length direction of the connecting sleeve 262; the pressure spring is pressed between the inner bottom of the connecting sleeve 262 and the lower end face of the input connecting rod 261;
the lower end of the connecting sleeve 262 is coaxially and fixedly connected with the upper end of the torsion column 21.
By adopting the buffer structure of the torsion column 21, the power output by the servo motor can be reliably transmitted and the limit of the vertical shaft 11 after the rotation positioning is ensured; and the damage easily caused by the torsion groove which is used for preventing the torsion column 21 from excessively pushing down to the top end of the vertical shaft 11 can be avoided, and a better protection effect is achieved.
The rocker arm assembling mechanism of the diaphragm gas meter further comprises a lifting table guide structure, and the lifting table guide structure comprises a guide column and a guide sleeve;
the guide post is vertically and fixedly arranged on the gantry type support 22, and the guide sleeve is fixedly arranged on the lifting platform 24 for press mounting and is connected with the guide post in a sliding and sleeved mode.
By adopting the lifting platform guide structure, the precision of the vertical motion of the lifting platform can be better ensured, and the assembly quality of the rocker arm can be better ensured.
The gantry support 22 is fixedly provided with a photoelectric sensor for detecting a bottom dead center of the lifting platform, an interface of the photoelectric sensor for detecting the bottom dead center of the lifting platform is connected with a corresponding interface on a controller of the power cylinder 23 for pressing through a cable, and the photoelectric sensor for detecting the bottom dead center of the lifting platform is used for outputting an electric signal for controlling the lifting platform 24 for pressing to descend to a certain height.
The photoelectric sensor has the advantages of high precision and fast response, and can rapidly output a control signal when the lifting platform 24 for press mounting reaches the bottom dead center, so that the lifting platform 24 for press mounting is stopped, and the assembly precision and the assembly quality are better realized and ensured.
The rocker arm assembling mechanism of the diaphragm gas meter further comprises a positioning plate guiding structure, and the positioning plate guiding structure comprises a guide rail and a sliding block;
the guide rail is vertically and fixedly installed on the lifting platform 24 for press mounting, and the slider is fixed on the double-rocker-arm bearing positioning plate 252 and is sleeved on the guide rail in a sliding manner.
By adopting the positioning plate guide structure, the positioning of the rocker arm and the rotating and positioning precision of the vertical shaft 11 can be better ensured, and the assembly quality of the rocker arm can be better ensured.
A photoelectric sensor for detecting a lower dead point of a positioning plate is fixedly arranged on the lifting platform 24 for press mounting, and an interface of the photoelectric sensor for detecting the lower dead point of the positioning plate is connected with a corresponding interface on a controller of the power cylinder 251 for carrying the rocker arm through a cable; the photoelectric sensor for detecting the bottom dead center of the positioning plate is used for outputting an electric signal for control after the double rocker arm bearing positioning plate 252 descends to a certain distance from the lifting table 24 for press mounting.
Therefore, the downward movement amount of the double rocker arms can be better ensured, and a better protection effect is achieved.
The rocker arm assembly mechanism further comprises a rocker arm transfer mechanism, the rocker arm transfer mechanism comprises a transmission module and a double-rocker-arm loading piece, a double-rocker-arm placing groove is formed in the upper surface of the double-rocker-arm loading piece, and two rocker arms placed in the double-rocker-arm placing groove can be kept in an X-shaped cross shape which is vertically overlapped and is bilaterally symmetrical in the overlooking direction;
the conveying module is used for conveying the double-rocker-arm loading piece;
the double-rocker loading piece comprises a double-rocker transplanting plate 30, and the double-rocker transplanting plate 30 is integrally in a long strip flat structure; one section of the double-rocker transplanting plate 30 in the length direction is fixed on a transmission piece of the transmission module, the other section of the double-rocker transplanting plate 30 in the length direction is a suspension section, and the upper surface of the suspension section is provided with the double-rocker placing groove.
In the prior art, a technical scheme with the bulletin number of CN109719494A discloses a rocker arm press-fitting mechanism for assembling a gas meter, and as can be seen from the detailed implementation mode and the attached drawings of the specification of the technical scheme, the technical scheme is that a plurality of mold transfer plates are adopted, each mold transfer plate is loaded with double rocker arms, after the double rocker arms on each mold transfer plate are pressed and fitted, the transfer plates of the double rocker arms of the mold are separated from a manipulator, and the manipulator clamps the next mold transfer plate again. The technical scheme has the defect that a large number of mould transfer plates are adopted to load the double rocker arms, so that the field space is occupied, and the difficulty of assembly operation and control is higher.
After the double-rocker transplanting plate 30 fixed on the transmission part of the transmission module is adopted in the technical scheme, the double rockers are transferred back and forth only through the double-rocker transplanting plate 30 and are suitable for being matched with a double-rocker receiving positioning plate 252 (see the description in the specific embodiment) developed by an applicant to quickly complete the transfer of the double rockers, and during the transfer, only the suspension section of the double-rocker transplanting plate 30 is moved to the position under the double-rocker receiving positioning plate 252, the suspension section of the double-rocker transplanting plate 30 occupies a small space, and the double-rocker transplanting plate can quickly return and can supplement materials again after the transfer of the double-rocker transplanting plate is completed (the supplementing process can be synchronously performed with the press-mounting process of the double rockers).
By last, the structure that the rocking arm forwarded the mechanism among this technical scheme is simpler, and occupation space is littleer, controls the degree of difficulty and lower, and can also effectively guarantee the material loading and the pressure equipment efficiency of two rocking arms, has more excellent popularization and use effect.
The hanging section of the double-rocker transplanting plate 30 is sequentially provided with a sleeve dropping section 301 and a rod connecting section dropping section 302 from inside to outside along the length direction of the double-rocker transplanting plate 30, wherein the sleeve dropping section 301 is used for dropping two connecting vertical shafts of the double rockers, and the rod connecting section dropping section 302 is used for dropping two connecting rods 14 on the double rockers by using the convex columns 102;
the sleeve dropping section 301 is integrally concave and forms a sleeve dropping groove for dropping two connecting vertical shafts of the double rocker arms, a pair of positioning holes are formed in the bottom of the sleeve dropping groove, the positioning holes are spaced in the width direction of the rocker arm transplanting plate, and the positioning holes are used for inserting and positioning the two connecting vertical shafts of the double rocker arms;
two spacing grooves are concavely arranged on the upper surface of the falling section 302 for the rod connecting section at intervals, and two side walls of each spacing groove can be connected with the side wall of the rod connecting section of the rocker arm falling into the spacing groove in an abutting mode to realize spacing; one of the two limiting grooves is deep for the rod connecting section of a single rocker arm to fall into, and the other limiting groove is deep for the rod connecting sections of the two rocker arms to fall into;
the sleeve is used for falling the groove and the two spacing recesses constitute the two rocking arm standing grooves together.
Adopt above-mentioned two rocking arm standing grooves's advantage to be:
the dead weight of the double-rocker transplanting plate 30 can be effectively reduced by the structure that the falling groove for the sleeve is concave as a whole and the groove bottom is provided with a pair of positioning holes; and the double rocker arms falling into the falling grooves and the two limiting grooves for the sleeve can reliably keep the X-shaped crossed posture before assembly, so that the transfer and press-fitting precision of the subsequent double rocker arms is effectively ensured.
The transmission module is a rodless cylinder 31 for transmission, and the transmission member of the transmission module is a moving table 311 of the rodless cylinder 31 for transmission.
The rodless cylinder is used as a transmission device of the double-rocker transplanting plate 30, so that the compactness of the rocker arm transfer mechanism can be improved by utilizing the advantages of less occupied land and space saving of the rodless cylinder.
Wherein, a receiving end and a discharging end of the cylinder body of the rodless cylinder 31 for transmission are respectively and fixedly provided with a photoelectric sensor, and a detection port of the photoelectric sensor can be blocked by the mobile station 311; the photoelectric sensor is connected with a corresponding interface signal on the controller of the rodless cylinder 31 for transmission.
The photoelectric sensor has the advantages of short response time and accurate measurement.
After the scheme is adopted, the mobile station 311 can be accurately stopped at the set positions of the material receiving end and the material discharging end of the cylinder body, so that the material receiving and feeding precision of the double rocker arms is effectively ensured, and the assembly precision of the rocker arms is better ensured.
The rocker arm transfer mechanism further comprises a vibrating disc 32 and a rocker arm material taking manipulator 33;
the vibration disc 32 is used for storing a plurality of rocker arms, and the vibration disc 32 can vibrate and discharge materials and output the rocker arms through a material guide groove of the vibration disc 32;
the rocker arm material taking manipulator 33 is used for taking out the rocker arm at the tail end of the discharging guide groove of the vibrating disc 32 and placing the rocker arm into the double-rocker arm placing groove of the double-rocker arm transplanting plate 30.
Adopt above-mentioned vibration dish 32 and rocking arm to get material manipulator 33, can continue to carry the rocking arm to two rocking arm transplanting plates 30 in order, better realization automation equipment process.
Wherein, the interval of two vertical side walls of the discharging guide groove of the vibrating disk 32 is consistent with the maximum width of a single rocker arm.
Like this, can ensure through the aforesaid that the ejection of compact guide slot of vibration dish 32 carries the rocking arm one by one along its length direction and the better gesture of keeping the rocking arm of ejection of compact guide slot terminal position, and then do benefit to rocking arm and get material manipulator 33 and accurately get the material.
Wherein, the tail end of the discharging guide groove of the vibrating disk 32 is provided with a rocker arm posture adjusting module (not shown in the figure);
the rocker arm posture adjustment comprises a power cylinder for posture adjustment and a push plate for posture adjustment, and the push plate for posture adjustment forms one of the vertical side walls of the tail end of the discharging guide groove; the power cylinder for attitude adjustment is fixedly installed along the width direction of the discharging guide groove, and the power cylinder push rod for attitude adjustment is fixedly connected with the push plate for attitude adjustment.
So, can adjust the gesture of the terminal rocking arm of the ejection of compact guide slot of vibration dish 32 by rocking arm gesture adjustment module to the uniformity of better assurance rocking arm gesture helps the accurate reliable material of getting of rocking arm reclaimer manipulator 33, and according to the accurate two rocking arm standing grooves of putting into of preset mode.
The material taking part of the rocker arm material taking manipulator 33 is provided with a vacuum chuck, and the vacuum chuck is used for being matched with the corresponding adsorption part 103 on the rocker arm to take away the rocker arm.
The vacuum chuck is utilized, so that the pressure loss damage of the rocker arm cannot be caused at first, and a better protection effect can be achieved. Secondly, the vacuum chuck occupies small space, and can realize reliable adsorption and transmission only by contacting with a single closed point on the upper surface of the rocker arm, so that the vacuum chuck has a better implementation effect.
Above-mentioned rocking arm assembly still includes pointer dish rotational positioning mechanism (promptly the utility model discloses):
the pointer plate rotation positioning mechanism comprises a bracket 41 for a cylinder body, a power cylinder 42 for lifting, a mounting flat plate 43, a stepping motor 44 and a rotating part;
the bottom of the cylinder body bracket 41 is fixedly arranged on a rocker arm assembly table 27 of the diaphragm gas meter;
the lifting power cylinder 42 is vertically and fixedly installed on the cylinder body bracket 41, and a push rod of the lifting power cylinder 42 faces downwards;
the mounting plate 43 is integrally of a flat plate-shaped structure fixedly mounted at the lower end of the push rod of the lifting power cylinder 42;
the stepping motor 44 is fixedly mounted on the mounting flat plate 43, and an output shaft of the stepping motor 44 faces downwards and penetrates through the mounting flat plate 43;
the length section below the installation flat plate 43 on the output shaft of the stepping motor 44 is fixedly provided with the rotating part, and the rotating part is used for driving the eccentric column 131 on the pointer disc 13 to rotate.
The operation process of the pointer disc positioning mechanism of the diaphragm gas meter in the technical scheme is as follows:
firstly, the power cylinder 42 for lifting can drive the installation flat plate 43 to realize vertical lifting:
wherein, after the power cylinder 42 for lifting drives the installation flat plate 43 to descend: the rotating piece and the eccentric column 131 on the pointer disc 13 can be driven to rotate by the stepping motor 44, so that the eccentric column 131 on the upper surface of the pointer disc 13 is equal to the center distance of the double vertical shafts 11 in rotation and the stepping motor 44 stops in the shortest time, and the pointer disc 13 is positioned at the moment; after the pointer disc 13 is positioned, the connecting rod 14 can be directly assembled between the eccentric column 131 of the pointer disc 13 and the outer end of the rocker arm, so that the assembling efficiency and the assembling precision of the connecting rod 14 are improved;
wherein, after the power cylinder 42 for lifting drives the installation flat plate 43 to rise: the rotating member is spaced from the diaphragm gas meter core on the rocker arm assembly table 27 so that the diaphragm gas meter core on the conveying device (such as a rotary table 28 or a conveying belt) can pass through smoothly.
Therefore, the pointer disc positioning mechanism of the diaphragm gas meter in the technical scheme can help the pointer disc to rotate and position quickly, so that the connecting rod 14 can be assembled directly after the rocker arm is assembled, and the assembling efficiency of the connecting rod 14 is improved.
As known to those skilled in the art, the stepping motor controls the angular displacement by inputting an electric pulse, and since the final position of the eccentric column 131 on the pointer plate 13 is determined, the stepping motor can finally reach the determined positioning position only by rotating the eccentric column 131 on the pointer plate 13 (several circles) through the rotating member.
Wherein the rotating member is a strip-shaped rotating rod 45 extending outwards along the radial direction of the output shaft of the stepping motor 44.
The structure of the rotating rod 45 is simpler, and after the structure of the rotating rod 45 is adopted, the rotating rod 45 is not easy to collide with the eccentric column 131 on the pointer disc 13 in the descending process along the installation flat plate 43, so that a better protection effect is achieved.
Wherein the rotating member is an annular structure (not shown) extending outwardly in a radial direction of the output shaft of the stepping motor 44 as a whole.
Thus, when the eccentric column 131 on the pointer dial 13 runs through the through hole in the ring structure, or the eccentric column 131 is pushed by the inner end of the ring structure and the pointer dial 13 is rotated; when the eccentric column 131 on the pointer plate 13 is located outside the ring structure, the eccentric column 131 can be pushed through the outer end of the ring structure, and the pointer plate 13 can be rotated.
The pointer disc rotation positioning mechanism further comprises a rotating piece buffer structure, and the rotating piece buffer structure comprises a middle transmission sleeve, an output connecting rod and a pressure spring;
the lower end of an output shaft of the stepping motor is coaxially and fixedly connected with the upper end of the intermediate transmission sleeve; the upper section of the output connecting rod is inserted through an opening at the bottom of the middle transmission sleeve; the outer side surface of the upper section of the output connecting rod is provided with two convex columns which are convex outwards along the radial direction and are uniformly distributed in the circumferential direction, the side wall of the middle transmission sleeve is provided with two strip-shaped holes for the two convex columns to penetrate through and keep contact connection, and the length directions of the two strip-shaped holes are consistent with the axial direction of the middle transmission sleeve; the pressure spring is pressed between the upper end face of the output connecting rod and the upper end face of the inner side of the middle transmission sleeve;
the lower section of the output connecting rod is fixedly provided with the rotating piece.
After adopting above-mentioned elastic buffer structure, can retreat to when striking at the elastic component with the eccentric column 131 of pointer dish 13 just, avoid the pressure to reduce the eccentric column 131 of pointer dish 13, play better guard action. Further, after the stepping motor 44 is rotated, the rotating member can be quickly restored to the position where the eccentric column 131 of the pointer dial 13 can be pushed to rotate, thereby ensuring reliable realization of the operation of the pointer dial 13.
The lifting power cylinder 42 is a double-rod cylinder.
The lifting action of the double-rod cylinder is more reliable, the guide limiting effect is better, and the reliability and the stroke of the vertical lifting movement of the installation flat plate 43 can be better maintained.
The upper ends of the double push rods of the double-rod cylinder are located outside the cylinder body and are fixedly connected with a limiting block 421.
The setting of above-mentioned stopper 421 can adjust the descending stroke of push rod to better adaptation to different core heights.
The installation flat plate 43 is of a long plate structure, the length of the installation flat plate 43 is matched with that of the down-the-film gas meter movement, and the stepping motor 44 is installed in the middle of the installation flat plate 43 in the length direction;
one end of the installation flat plate 43 along the length direction is a front end, and the other end is a rear end; the upper end surface of the rear end of the mounting flat plate 43 is fixedly connected with a push rod of the power cylinder 42 for lifting; two downward-protruding blocking columns 46 are fixedly arranged on the lower end face of the front end of the installation flat plate 43, the two blocking columns 46 correspond to the two shifting forks 15, connected with the cam on the lower side of the pointer disc 13, of the gas meter movement one by one, and the lower end of each blocking column 46 can be formed in a mode of being close to the upper end face of the corresponding shifting fork 15 in the rotating shaft position after the installation flat plate 43 descends.
After the structure of the blocking column 46 is adopted, the shifting fork 15 can be prevented from being abnormally separated through the lower end of the blocking column 46, so that the reliability of the pointer disc rotation positioning operation is better ensured.
A resisting block 47 is arranged on the lower surface of the mounting flat plate 43 near the rear end, the resisting block 47 is a long strip structure extending along the width direction of the mounting flat plate 43, an upward convex guide post is arranged on the upper end surface of the resisting block 47, and two guide posts are arranged at intervals along the length direction of the resisting block 47;
the two inserting columns penetrate through the mounting flat plate 43, and the upper ends of the two inserting columns are fixedly connected with limiting sleeves; springs are sleeved outside the two inserting columns below the mounting flat plate 43; the abutting block 47 can be positioned right above two valve covers of the core of the diaphragm gas meter.
The valve cover is tightly pressed on the valve gate by a spring in the pressing block 47, and the pointer disc is driven to rotate by the stepping motor, so that the valve gate valve cover is ground, the contact surface of the valve gate valve cover and the valve gate valve cover is flatter, and the valve gate valve cover is favorable for passing a subsequent leakage test.
When the rocker arm assembling mechanism of the diaphragm gas meter is implemented, the rocker arm assembling mechanism further comprises an assembling table and a turntable 28 mechanism, the turntable 28 mechanism is integrally installed on the assembling table, and the turntable 28 is installed on the table surface of the assembling table; 4-6 stations are uniformly arranged on the rotary disc 28 of the rotary disc 28 mechanism at intervals along the circumferential direction, and each station is fixedly provided with a gas meter movement limiting bracket.
In the rotating direction of the turntable 28, the pointer plate rotation positioning mechanism and the rocker arm assembly mechanism are sequentially arranged from front to back on an assembly table surface arranged on the periphery of the turntable 28.
In practice, the pressing cylinder 23 and the receiving rocker arm cylinder 251 are both cylinders.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the technical scope of the present invention, and the technical scope of the present invention is also considered to fall into the scope of the claims.

Claims (8)

1. Pointer dish positioning mechanism of diaphragm type gas table, its characterized in that: comprises a bracket for a cylinder body, a power cylinder for lifting, a mounting flat plate, a stepping motor and a rotating piece;
the bottom of the cylinder body support is fixedly arranged on a rocker arm assembly table of the diaphragm gas meter;
the power cylinder for lifting is vertically and fixedly arranged on the bracket for the cylinder body, and a push rod of the power cylinder for lifting faces downwards;
the whole installation flat plate is of a flat structure fixedly installed at the lower end of a push rod of the power cylinder for lifting;
the stepping motor is fixedly arranged on the installation flat plate, and an output shaft of the stepping motor faces downwards and penetrates through the installation flat plate;
the output shaft of the stepping motor is fixedly provided with the rotating part on the length section below the installation flat plate, and the rotating part is used for driving the eccentric column on the pointer disc to rotate.
2. The pointer plate positioning mechanism for a membrane gas meter according to claim 1, characterized in that: the rotating piece is a strip-shaped rotating rod which extends outwards along the radial direction of the output shaft of the stepping motor.
3. The pointer plate positioning mechanism for a membrane gas meter according to claim 1, characterized in that: the rotating part is of an annular structure which integrally extends outwards along the radial direction of the output shaft of the stepping motor.
4. The pointer plate positioning mechanism of the membrane gas meter according to claim 2 or 3, characterized in that: the rotating part buffer structure comprises a middle transmission sleeve, an output connecting rod and a pressure spring;
the lower end of an output shaft of the stepping motor is coaxially and fixedly connected with the upper end of the intermediate transmission sleeve; the upper section of the output connecting rod is inserted through an opening at the bottom of the middle transmission sleeve; the outer side surface of the upper section of the output connecting rod is provided with two convex columns which are convex outwards along the radial direction and are uniformly distributed in the circumferential direction, the side wall of the middle transmission sleeve is provided with two strip-shaped holes for the two convex columns to penetrate through and keep contact connection, and the length directions of the two strip-shaped holes are consistent with the axial direction of the middle transmission sleeve; the pressure spring is pressed between the upper end face of the output connecting rod and the upper end face of the inner side of the middle transmission sleeve;
the lower section of the output connecting rod is fixedly provided with the rotating piece.
5. The pointer plate positioning mechanism for a membrane gas meter according to claim 1, characterized in that: the power cylinder for lifting is a double-rod cylinder.
6. The pointer plate positioning mechanism for a membrane gas meter according to claim 5, characterized in that: the upper end of the double push rod of the double-rod cylinder is positioned outside the cylinder body and is fixedly connected with a limiting block together.
7. The pointer plate positioning mechanism for a membrane gas meter according to claim 1, characterized in that: the installation flat plate is of a long plate-shaped structure, the length of the installation flat plate is matched with that of the down-the-film gas meter movement, and the stepping motor is installed in the middle of the installation flat plate in the length direction;
one end of the installation flat plate along the length direction of the installation flat plate is a front end, and the other end of the installation flat plate is a rear end; the upper end surface of the rear end of the mounting flat plate is fixedly connected with a push rod of the power cylinder for lifting; the gas meter is characterized in that two downward-protruding blocking columns are fixedly arranged on the lower end face of the front end of the installation flat plate, the two blocking columns correspond to two shifting forks connected with a cam on the lower side of a pointer disc on a gas meter machine core one by one, and the lower end of each blocking column can be formed by being adjacent to the upper end face of the corresponding shifting fork on a rotating shaft after descending along the installation flat plate.
8. The pointer plate positioning mechanism for a membrane gas meter according to claim 7, characterized in that: the lower surface of the mounting flat plate is provided with a resisting block at a position close to the rear end, the resisting block is of a long strip-shaped structure extending along the width direction of the mounting flat plate, the upper end surface of the resisting block is provided with an upward convex guide post, and two guide posts are arranged at intervals along the length direction of the resisting block;
the two inserting columns penetrate through the mounting flat plate, and the upper ends of the two inserting columns are fixedly connected with limiting sleeves; springs are sleeved outside the two inserting columns below the mounting flat plate; the abutting stop block can be positioned right above two valve covers of the core of the diaphragm gas meter.
CN201921753992.XU 2019-10-18 2019-10-18 Pointer disc positioning mechanism of diaphragm gas meter Active CN210587982U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921753992.XU CN210587982U (en) 2019-10-18 2019-10-18 Pointer disc positioning mechanism of diaphragm gas meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921753992.XU CN210587982U (en) 2019-10-18 2019-10-18 Pointer disc positioning mechanism of diaphragm gas meter

Publications (1)

Publication Number Publication Date
CN210587982U true CN210587982U (en) 2020-05-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113967839A (en) * 2021-11-20 2022-01-25 重庆前卫表业有限公司 Automatic assembly method and assembly line for movement of diaphragm gas meter
CN114193147A (en) * 2020-09-18 2022-03-18 成都秦川物联网科技股份有限公司 Positioning mechanism for assembling diaphragm capsule of Internet of things intelligent gas meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114193147A (en) * 2020-09-18 2022-03-18 成都秦川物联网科技股份有限公司 Positioning mechanism for assembling diaphragm capsule of Internet of things intelligent gas meter
CN114193147B (en) * 2020-09-18 2022-11-08 成都秦川物联网科技股份有限公司 Positioning mechanism for assembling film box of Internet of things intelligent gas meter
CN113967839A (en) * 2021-11-20 2022-01-25 重庆前卫表业有限公司 Automatic assembly method and assembly line for movement of diaphragm gas meter

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Effective date of registration: 20211019

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