Diaphragm cutting mechanism for gas meter

Abstract

The utility model discloses a cutting mechanism for a diaphragm of a gas meter. The cutting mechanism comprises a lifting mechanism and a cutting mechanism, the positioning plate is arranged under the lifting mechanism; a gap is formed in the upper end for the film belt to pass through; the pre-pressing mechanism is connected with the telescopic end of the lifting mechanism; the pressing plate is connected with the pre-pressing mechanism and located in the notch of the positioning plate, and the lower end face of the pressing plate is attached to the bottom face of the notch of the positioning plate; the outer side plate surface of the pressing plate is parallel to the outer side plate surface of the positioning plate; the cutting plate is in horizontal sliding clamping and embedding connection with the telescopic end of the lifting mechanism through the pre-pressing mechanism and is located on the outer side of the positioning plate; the force storage punching mechanism is arranged on the positioning plate; and the side pressing mechanism is arranged on the positioning plate and applies extrusion force to the outer side of the positioning plate to the cutting plate when the lifting mechanism extends. The film tape cutting device can smoothly cut a film tape with an interlayer, and can still smoothly cut the film tape after long-term brake cutting, so that the frequency of maintenance is reduced.

Description

Technical Field

[0001] The utility model relates to the field of gas meter diaphragm cutting, in particular to a gas meter diaphragm cutting mechanism. Background Art

[0002] A diaphragm gas meter is a metering device for measuring gas usage. The working principle of a diaphragm gas meter is mainly based on the volumetric method, that is, cumulative metering is carried out by measuring the gas volume flow rate. Its working process is as follows: When gas enters the gas meter, a pressure difference is generated at both ends of the gas meter inlet and outlet. This pressure difference pushes the diaphragm to reciprocate in the metering chamber, and at the same time drives the gas distribution mechanism to coordinate gas distribution. Each reciprocating movement of the diaphragm discharges a certain amount of gas. When the roller rotates through a counting unit, a roller rotation metering display is realized, thus realizing the cumulative metering of gas. In addition, the driving force for the diaphragm movement depends on the gas pressure difference at the gas meter inlet and outlet. When the diaphragm is moved to the extreme position on one side, another diaphragm is required to generate the same driving force to drive the first diaphragm to return, realizing continuous automatic metering.

[0003] Therefore, the diaphragm in the diaphragm gas meter is a very important component, and its manufacturing process includes processes such as diaphragm belt cutting and diaphragm vulcanization. For some diaphragm belts with a cloth layer, conventional cutting cannot cut the sandwich cloth and nitrile rubber at the same time. Currently, the chopping or guillotine cutting method is generally used. For the chopping method, a chopping force-bearing member needs to be arranged under the diaphragm belt. After long-term chopping, grooves will be formed on the surface of the force-bearing member (the diaphragm belt will be stuck in the grooves, resulting in incomplete chopping of the sandwich cloth, forming "incomplete separation") or the sharpness of the chopping knife will decrease (which will also lead to incomplete cutting). Generally, the chopping position is fluctuated to avoid forming chopping grooves or the force-bearing member is frequently replaced to deal with the chopping grooves, and the sharpness problem is solved by frequently replacing the chopping knife. For the guillotine cutting method, although there is no problem with the force-bearing member in the chopping method, the guillotine cutting knife and the guillotine need to maintain a small gap (the best is no gap) to smoothly cut the sandwich layer. However, after using the current guillotine cutting equipment for a period of time, there is an increase in the play between the cutting knife and the guillotine, resulting in the problem that the sandwich layer cannot be completely cut, and frequent maintenance is required. Summary of the Utility Model

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a gas meter diaphragm cutting mechanism, which can smoothly cut the diaphragm belt with a sandwich layer, and can still be smoothly cut after long-term guillotine cutting, reducing the frequency of maintenance.

[0005] The purpose of the present utility model is realized through the following technical solutions:

[0006] A gas meter diaphragm cutting mechanism includes:

[0007] A lifting mechanism, which is arranged vertically downward;

[0008] The positioning plate is arranged directly below the lifting mechanism; a notch is provided at the upper end for the film tape to pass through;

[0009] The pre-pressing mechanism is connected to the telescopic end of the lifting mechanism;

[0010] The pressing plate is connected to the pre-pressing mechanism, located within the notch of the positioning plate, and the lower end face thereof is in contact with the bottom surface of the notch of the positioning plate; the outer side plate surface of the pressing plate is parallel to the outer side plate surface of the positioning plate; when the lifting mechanism extends, after the pressing plate abuts against the notch of the positioning plate through the pre-pressing mechanism, the telescopic end of the lifting mechanism can continue to extend;

[0011] The cutting plate is horizontally slidably clamped and connected to the telescopic end of the lifting mechanism through the pre-pressing mechanism, and is located outside the positioning plate; after the lifting mechanism shortens, the horizontal height of the lower end face of the cutting plate is higher than the horizontal height of the lower end face of the pressing plate;

[0012] The energy storage and stamping mechanism is arranged on the positioning plate and interferes with the cutting plate. When the lifting mechanism descends, the cutting plate interferes with the energy storage and stamping mechanism until the lifting mechanism extends beyond a predetermined value, and then the energy storage and stamping mechanism releases the limit on the cutting plate;

[0013] The side pressing mechanism is arranged on the positioning plate and applies a force to squeeze the cutting plate outwardly from the positioning plate when the lifting mechanism extends.

[0014] Furthermore, clamping chutes are provided on the opposite sides of the notch of the positioning plate; clamping protrusions corresponding to the clamping chutes are provided on the opposite sides of the pressing plate.

[0015] Furthermore, the pre-pressing mechanism includes two pre-pressing springs which are vertically arranged, and the two pre-pressing springs respectively connect the upper end faces of the pressing plate and the cutting plate to the telescopic end of the lifting mechanism.

[0016] Furthermore, outwardly protruding ear plates are provided on the two side end faces of the cutting plate; strip-shaped holes are provided on the positioning plate at positions opposite to the ear plates;

[0017] There are two energy storage and stamping mechanisms, which are respectively arranged on both sides of the positioning plate and are opposite to the two ear plates; the energy storage and stamping mechanism includes:

[0018] A rotating rod, the middle part of which is hinged in the strip-shaped hole; the rotation plane of the rotating rod is perpendicular to the plate surface of the positioning plate;

[0019] An energy storage spring is arranged inside the positioning plate, one end of which is connected to the plate surface of the positioning plate, and the other end is connected to the tail of the rotating rod, controlling the head of the rotating rod to protrude out of the outer side surface of the positioning plate and be located directly below the ear plate. When the lifting mechanism extends, the ear plate pushes the rotating rod to rotate, so that the head of the rotating rod turns into the strip-shaped hole.

[0020] Furthermore, a support plate is provided on the inner side of the positioning plate, and the force storage spring is connected to the positioning plate through the support plate;

[0021] The upper surface of the head of the rotating rod is provided with a force storage groove with a curved cross-section, and the lower surface of the head of the rotating rod is provided with an inclined guide surface, and the guide surface forms an obtuse angle with the plate surface of the positioning plate; the lower surface and the inner side surface of the ear plate are chamfered; the upper surface and the inner side surface of the ear plate are chamfered.

[0022] Furthermore, the side pressure mechanism includes at least two groups of side pressure components, which are respectively arranged on both sides of the cutting plate; the side pressure components include:

[0023] The side pressure protrusion is arranged on the cutting plate, and the outer end surface is an inclined surface inclined downward;

[0024] The elastic side pressure head is fixedly connected to the positioning plate; the inner end surface of the elastic side pressure head is opposite to the side pressure protrusion; the inner end surface of the elastic side pressure head is inclined, and has the same inclination as the outer end surface of the side pressure protrusion; when the lifting mechanism is reset, a gap is left between the elastic side pressure head and the side pressure protrusion; when the lifting mechanism is extended, the inner end surface of the elastic side pressure head and the outer end surface of the side pressure protrusion slide and squeeze.

[0025] Furthermore, the elastic side pressure head comprises:

[0026] The bottom sleeve is in an open barrel shape, with the opening facing the cutting plate and fixedly connected to the positioning plate;

[0027] A compression spring is arranged in the bottom sleeve;

[0028] The side head is sleeved in the bottom sleeve and abuts against the extrusion spring; the exposed end surface of the side head is provided with an inclined surface matching the outer end surface of the side pressure protrusion.

[0029] Furthermore, there are four side pressure assemblies, which are distributed on both sides of the cutting plate in groups of two.

[0030] Furthermore, the lifting mechanism comprises:

[0031] The bottom plate, the lower surface of which is connected to the cutting plate and the pressing plate through a pre-pressing mechanism;

[0032] A lifting cylinder is arranged vertically, and the telescopic end is connected to the upper surface of the base plate;

[0033] A fixed plate, the lower surface of which is fixedly connected to the bottom of the lifting cylinder;

[0034] A plurality of guide columns have lower ends fixedly connected to the upper plate surface of the bottom plate, and upper ends passing through the fixing plate and slidably connected to the fixing plate.

[0035] Furthermore, at least two limiting sliding grooves are provided on the lower surface of the bottom plate, and the limiting sliding grooves are perpendicular to the outer plate surface of the positioning plate; a clamping slider is arranged in the limiting sliding groove; the slider is connected to the upper end surface of the cutting plate through a pre-pressure spring.

[0036] Due to the adoption of the above technical solutions, the utility model has the following advantages:

[0037] 1. Through the pre-pressure mechanism, a single lifting mechanism can complete the pressing and fixing of the film tape required for gate cutting and the smooth gate cutting of the cutting plate, without the need for two independent sets of motion mechanisms for control, with a simple structure and lower cost.

[0038] 2. Through the energy storage stamping mechanism, the force of the lifting mechanism is accumulated to form a high-g gate cutting force, ensuring that the film tape sandwich can be smoothly cut.

[0039] 3. Through the side pressure mechanism, the gap between the cutting plate and the pressing plate and the positioning plate can be minimized as much as possible during the gate cutting process of the cutting plate, making the gate cutting process smoother.

[0040] Other advantages, objectives and features of the utility model will be elaborated to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings of the utility model are described as follows:

[0042] Figure 1 It is a front view structural schematic diagram of the gas meter diaphragm cutting mechanism in the embodiment.

[0043] Figure 2 For Figure 1 The enlarged structural schematic diagram at A in

[0044] Figure 3 For Figure 1 The enlarged structural schematic diagram at B in

[0045] Figure 4 For Figure 3 The structural schematic diagram of the C-C section in

[0046] Figure 5 For Figure 1 The structural schematic diagram of the D-D section in

[0047] Figure 6 For Figure 5 The enlarged structural schematic diagram at E in

[0048] Figure 7 For Figure 1 The structural schematic diagram of the F-F section in

[0049] Figure 8 is Figure 7 The enlarged structure diagram at position G in

[0050] Figure 9 is Figure 1 The structure diagram at the H-H section in

[0051] In the figure: 11. Bottom plate; 111. Limit sliding groove; 112. Clamping slider; 12. Lifting cylinder; 13. Fixed plate; 14. Guide post; 2. Positioning plate; 21. Notch; 211. Clamping sliding groove; 22. Strip hole; 23. Support plate; 31. Preloading spring; 4. Pressing plate; 41. Clamping protrusion; 5. Cutting plate; 51. Ear plate; 61. Rotating rod; 611. Energy storage groove; 612. Guiding surface; 62. Energy storage spring; 71. Side pressing protrusion; 721. Bottom sleeve; 722. Extrusion spring; 723. Side head; 8. Membrane belt. Specific implementation mode

[0052] The present utility model will be further described below with reference to the drawings and embodiments.

[0053] Embodiment:

[0054] As Figures 1 to 9 shown, a gas meter diaphragm cutting mechanism includes:

[0055] A lifting mechanism, vertically downwardly arranged;

[0056] A positioning plate 2, arranged directly below the lifting mechanism; a notch 21 is provided at the upper end for the membrane belt 8 to pass through;

[0057] A preloading mechanism, connected to the telescopic end of the lifting mechanism;

[0058] A pressing plate 4, connected to the preloading mechanism, located within the notch 21 of the positioning plate 2, and the lower end surface thereof is in contact with the bottom surface of the notch 21 of the positioning plate 2; the outer side plate surface of the pressing plate 4 is parallel to the outer side plate surface of the positioning plate 2; when the lifting mechanism extends, after the pressing plate 4 abuts against the notch 21 of the positioning plate 2 through the preloading mechanism, the telescopic end of the lifting mechanism can continue to extend;

[0059] A cutting plate 5, horizontally slidably clamped to the telescopic end of the lifting mechanism through the preloading mechanism, located outside the positioning plate 2; after the lifting mechanism shortens, the horizontal height of the lower end surface of the cutting plate 5 is higher than the horizontal height of the lower end surface of the pressing plate 4;

[0060] An energy storage stamping mechanism, arranged on the positioning plate 2, interfering with the cutting plate 5, when the lifting mechanism descends, the cutting plate 5 interferes with the energy storage stamping mechanism, until after the lifting mechanism extends beyond a predetermined value, the energy storage stamping mechanism releases the limit on the cutting plate 5;

[0061] The side pressing mechanism is arranged on the positioning plate 2 and applies a force to extrude the cutting plate 5 outward from the positioning plate 2 when the lifting mechanism extends.

[0062] Through the preloading mechanism, a single lifting mechanism can complete the pressing and fixing of the film belt 8 required for gate cutting and the smooth gate cutting of the cutting plate 5. There is no need for two separate independent motion mechanisms for control, the structure is simple, and the cost is lower. Through the energy storage stamping mechanism, the force of the lifting mechanism is stored to form a high-g gate cutting force to ensure that the film belt 8 sandwich can be smoothly cut. Through the side pressing mechanism, the gap between the cutting plate 5 and the pressing plate 4 and the positioning plate 2 can be minimized as much as possible during the gate cutting process, making the gate cutting process smoother.

[0063] In this embodiment, on the opposite sides of the notch 21 of the positioning plate 2, there are provided clamping chutes 211; on the opposite sides of the pressing plate 4, there are provided clamping protrusions 41 corresponding to the clamping chutes 211.

[0064] The movement of the pressing plate 4 can be limited through the clamping chutes 211 and the clamping chutes 211 to ensure that the outer side surface of the pressing plate 4 and the outer side plate surface of the positioning plate 2 can be on the same horizontal plane.

[0065] In this embodiment, the preloading mechanism includes two preloading springs 31, which are vertically arranged. The two preloading springs 31 respectively connect the upper end surfaces of the pressing plate 4 and the cutting plate 5 with the telescopic end of the lifting mechanism.

[0066] In this embodiment, on the two side end faces of the cutting plate 5, there are provided outwardly protruding ear plates 51; at the positions on the positioning plate 2 opposite to the ear plates 51, there are provided strip-shaped holes 22;

[0067] There are two energy storage stamping mechanisms, which are respectively arranged on both sides of the positioning plate 2, opposite to the two ear plates 51; the energy storage stamping mechanism includes:

[0068] A rotating rod 61, whose middle part is hinged in the strip-shaped hole 22; the rotation plane of the rotating rod 61 is perpendicular to the plate surface of the positioning plate 2;

[0069] An energy storage spring 62, which is arranged inside the positioning plate 2, one end is connected to the plate surface of the positioning plate 2, and the other end is connected to the tail of the rotating rod 61, controlling the head of the rotating rod 61 to extend out of the outer side surface of the positioning plate 2 and be located directly below the ear plate 51. When the lifting mechanism extends, the ear plate 51 pushes the rotating rod 61 to rotate, causing the head of the rotating rod 61 to turn into the strip-shaped hole 22.

[0070] By the contact between the ear plate 51 and the rotating rod 61, the energy storage spring 62 is stored with energy, and the movement of the ear plate 51 is restricted, so that the preloading spring 31 connected to the cutting plate 5 is compressed and stored with energy.

[0071] In this embodiment, a support plate 23 is provided on the inner side surface of the positioning plate 2, and the energy storage spring 62 is connected to the positioning plate 2 through the support plate 23;

[0072] On the upper surface of the head of the rotating rod 61, an energy storage groove 611 with a curved cross-section is provided. On the lower surface of the head of the rotating rod 61, an inclined guiding surface 612 is provided, and the guiding surface 612 forms an obtuse angle with the plate surface of the positioning plate 2; the lower surface and the inner side surface of the ear plate 51 are rounded; the upper surface and the inner side surface of the ear plate 51 are rounded.

[0073] The energy storage groove 611 can make the rotation of the rotating rod 61 require greater force, enabling more sufficient energy storage. At the same time, the guiding surface 612 of the rotating rod 61 can enable the ear plate 51 to smoothly reset upward after the cutting plate 5 completes the sluice cutting.

[0074] In this embodiment, the side pressing mechanism includes at least two groups of side pressing components, which are respectively arranged on both sides of the cutting plate 5; the side pressing components include:

[0075] A side pressing protrusion 71 is provided on the cutting plate 5, and the outer end surface is an inclined surface inclined downward;

[0076] An elastic side pressing head is fixedly connected to the positioning plate 2; the inner end surface of the elastic side pressing head faces the side pressing protrusion 71; the inner end surface of the elastic side pressing head is inclined, and has the same inclination as the outer end surface of the side pressing protrusion 71; when the lifting mechanism resets, a gap is left between the elastic side pressing head and the side pressing protrusion 71; when the lifting mechanism extends, the inner side end surface of the elastic side pressing head slides and presses against the outer end surface of the side pressing protrusion 71.

[0077] In this embodiment, the elastic side pressing head includes:

[0078] A bottom sleeve 721, which is in the shape of an open barrel, with the opening facing the cutting plate 5 and is fixedly connected to the positioning plate 2;

[0079] An extrusion spring 722 is arranged inside the bottom sleeve 721;

[0080] A side head 723 is sleeved inside the bottom sleeve 721 and abuts against the extrusion spring 722; the exposed end surface of the side head 723 is provided with an inclined surface matching the outer end surface of the side pressing protrusion 71.

[0081] Through the downward movement of the cutting plate 5, the side pressing protrusion 71 and the side head 723 are mutually extruded, forcing the cutting plate 5 to fit more closely to the positioning plate 2, so that the gap of the sluice cutting is smaller.

[0082] In this embodiment, there are four side pressing components, which are distributed in two groups on both sides of the cutting plate 5.

[0083] In this embodiment, the lifting mechanism includes:

[0084] The bottom plate 11 is connected to the cutting plate 5 and the pressing plate 4 through a preloading mechanism on its lower surface;

[0085] The lifting cylinder 12 is vertically arranged, and its telescopic end is connected to the upper surface of the bottom plate 11;

[0086] The fixing plate 13 has its lower surface fixedly connected to the bottom of the lifting cylinder 12;

[0087] A plurality of guide posts 14 have their lower ends fixedly connected to the upper plate surface of the bottom plate 11, and their upper ends pass through the fixing plate 13 and are slidably connected to the fixing plate 13.

[0088] In this embodiment, at least two limiting sliding grooves 111 are provided on the lower surface of the bottom plate 11, and the limiting sliding grooves 111 are perpendicular to the outer plate surface of the positioning plate 2; a clamping slider 112 is arranged in the limiting sliding grooves 111; the slider is connected to the upper end surface of the cutting plate 5 through a preloading spring 31.

[0089] Through the clamping slider 112, the cutting plate 5 can move relative to the plate surface of the positioning plate 2, so that when the side pressing protrusion 71 and the side head 723 are mutually extruded, the cutting plate 5 can be more closely attached to the positioning plate 2.

[0090] In this embodiment, the gas meter diaphragm cutting mechanism works as follows. Reset the device to the Figure 1 state shown, and pass the film tape 8 to be cut through the gap between the notch 21 and the pressing plate 4.

[0091] When cutting is required, control the telescopic end of the lifting mechanism to extend. At this time, the two preloading springs 31 are stressed, driving the pressing plate 4 and the cutting plate 5 to move downward. As the lifting mechanism continues to extend, the lower end of the pressing plate 4 first presses against the diaphragm and abuts against the notch 21 groove. At this time, the diaphragm is pressed and fixed; the ear plate 51 of the cutting block abuts against the energy storage groove 611 of the rotating rod 61, and the downward movement of the ear plate 51 is restricted. At this time, the preloading spring 31 connected to the cutting plate 5 is compressed. As the lifting mechanism continues to extend, when the force of the preloading spring 31 on the cutting plate 5 is greater than the force of the ear plate 51 to push the rotating rod 61 to rotate, the rotating rod 61 is rotated, the ear plate 51 crosses the energy storage groove 611, and the force of the preloading spring 31 is instantly released. The cutting plate 5 slides downward rapidly. While sliding, the side pressing protrusion 71 on the cutting plate 5 and the side head 723 are mutually extruded, making the cutting plate 5 also closely attached to the positioning plate 2. In this way, the cutting plate 5 cuts the film tape 8 in a state of being closely attached to the positioning plate 2. The whole process can have sufficient cutting force and a small cutting gap, so as to ensure that the diaphragm in the interlayer can still be smoothly and completely cut.

[0092] After cutting is completed, control the lifting mechanism to shorten. Subsequently, the ear plate 51 contacts the guiding surface 612 of the rotating rod 61, forcing the rotating rod 61 to rotate slowly until the ear plate 51 crosses the rotating rod 61 to complete the reset of the ear plate 51.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A gas meter diaphragm cutting mechanism, characterized in that: include: A lifting mechanism is arranged vertically downward; The positioning plate is arranged directly below the lifting mechanism; a notch is provided at the upper end for the film belt to pass through; A pre-pressing mechanism connected to the telescopic end of the lifting mechanism; The pressing plate is connected to the pre-pressing mechanism and is located in the notch of the positioning plate, and the lower end surface is in contact with the bottom surface of the notch of the positioning plate; the outer plate surface of the pressing plate is parallel to the outer plate surface of the positioning plate; when the lifting mechanism is extended, the pressing plate is abutted against the notch of the positioning plate by the pre-pressing mechanism, and the telescopic end of the lifting mechanism can continue to extend; The cutting plate is connected to the telescopic end of the pre-pressing mechanism by horizontal sliding engagement, and is located outside the positioning plate; after the lifting mechanism is shortened, the horizontal height of the lower end surface of the cutting plate is higher than the horizontal height of the lower end surface of the pressing plate; The force storage punching mechanism is arranged on the positioning plate and interferes with the cutting plate. When the lifting mechanism descends, the cutting plate interferes with the force storage punching mechanism until the lifting mechanism is extended beyond a predetermined value, and then the force storage punching mechanism releases the limit on the cutting plate. The side pressure mechanism is arranged on the positioning plate, and applies a force to the cutting plate to press the cutting plate toward the outside of the positioning plate when the lifting mechanism is extended.

2. The gas meter diaphragm cutting mechanism according to claim 1, characterized in that: The opposite sides of the notch of the positioning plate are provided with embedded sliding grooves; the opposite sides of the pressing plate are provided with embedded protrusions corresponding to the embedded sliding grooves.

3. The gas meter diaphragm cutting mechanism according to claim 2, characterized in that: The pre-stressing mechanism comprises two pre-stressing springs which are arranged vertically. The two pre-stressing springs respectively connect the upper end surfaces of the pressing plate and the cutting plate with the telescopic end of the lifting mechanism.

4. The gas meter diaphragm cutting mechanism according to claim 1, characterized in that: The two side end surfaces of the cutting plate are provided with outwardly protruding ear plates; the positioning plate is provided with strip holes at positions opposite to the ear plates; There are two force storage punching mechanisms, which are respectively arranged on both sides of the positioning plate and facing the two ear plates; the force storage punching mechanism includes: A rotating rod, the middle part of which is hinged in the strip hole; the rotating plane of the rotating rod is perpendicular to the plate surface of the positioning plate; The force storage spring is arranged on the inner side of the positioning plate, one end of which is connected to the plate surface of the positioning plate, and the other end is connected to the tail of the rotating rod, controlling the head of the rotating rod to extend out of the outer side surface of the positioning plate and be located directly below the ear plate. When the lifting mechanism is extended, the ear plate pushes the rotating rod to rotate, so that the head of the rotating rod rotates into the strip hole.

5. The gas meter diaphragm cutting mechanism according to claim 4, characterized in that: A support plate is provided on the inner side of the positioning plate, and the force storage spring is connected to the positioning plate through the support plate; The upper surface of the head of the rotating rod is provided with a force storage groove with a curved cross-section, and the lower surface of the head of the rotating rod is provided with an inclined guide surface, and the guide surface forms an obtuse angle with the plate surface of the positioning plate; the lower surface and the inner side surface of the ear plate are chamfered; the upper surface and the inner side surface of the ear plate are chamfered.

6. The gas meter diaphragm cutting mechanism according to claim 1, characterized in that: The side pressure mechanism comprises at least two sets of side pressure components, which are respectively arranged on both sides of the cutting plate; the side pressure components include: The side pressure protrusion is arranged on the cutting plate, and the outer end surface is an inclined surface inclined downward; The elastic side pressure head is fixedly connected to the positioning plate; the inner end surface of the elastic side pressure head is opposite to the side pressure protrusion; the inner end surface of the elastic side pressure head is inclined, and has the same inclination as the outer end surface of the side pressure protrusion; when the lifting mechanism is reset, a gap is left between the elastic side pressure head and the side pressure protrusion; when the lifting mechanism is extended, the inner end surface of the elastic side pressure head and the outer end surface of the side pressure protrusion slide and squeeze.

7. The gas meter diaphragm cutting mechanism according to claim 6, characterized in that: The elastic side pressure head comprises: The bottom sleeve is in an open barrel shape, with the opening facing the cutting plate and fixedly connected to the positioning plate; A compression spring is arranged in the bottom sleeve; The side head is sleeved in the bottom sleeve and abuts against the extrusion spring; the exposed end surface of the side head is provided with an inclined surface matching the outer end surface of the side pressure protrusion.

8. The gas meter diaphragm cutting mechanism according to claim 6 or 7, characterized in that: There are four side pressure components, which are distributed on both sides of the cutting board in groups of two.

9. The gas meter diaphragm cutting mechanism according to claim 3, characterized in that: The lifting mechanism comprises: The bottom plate, the lower surface of which is connected to the cutting plate and the pressing plate through a pre-pressing mechanism; A lifting cylinder is arranged vertically, and the telescopic end is connected to the upper surface of the base plate; A fixed plate, the lower surface of which is fixedly connected to the bottom of the lifting cylinder; A plurality of guide columns have lower ends fixedly connected to the upper plate surface of the bottom plate, and upper ends passing through the fixing plate and slidably connected to the fixing plate.

10. The gas meter diaphragm cutting mechanism according to claim 9, characterized in that: At least two limiting slide grooves are provided on the lower surface of the bottom plate, and the limiting slide grooves are perpendicular to the outer plate surface of the positioning plate; a clamping slider is provided in the limiting slide groove; and the slider is connected to the upper end surface of the cutting plate through a pre-stressed spring.

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