A cushioning structure for a bottle mouth measuring mechanism

Abstract

The utility model discloses a kind of buffer structures of bottle mouth measuring mechanism, it is related to glass bottle measurement field, its technical key points are: including support seat, the side of support seat is slidably connected with movable seat, the top of support seat is equipped with the drive cylinder of drive movable seat, the side of support seat is equipped with two limit seats, two The limit interval is formed by spacing of limit seat, the inside of limit interval is located movable seat, the bottom of movable seat is equipped with connecting rod, the connecting rod is worn and comes out below limit seat, it aims at solving movable seat and the impact of lower limit seat, its impact force can be transmitted to linear bearing when, linear bearing is as precision sliding component, its internal ball or bushing structure is extremely sensitive to instantaneous impact, long-term repeated impact is prone to scratch inside wall of linear bearing, ball deformation even bearing whole separates from movable groove, affect the technical problem of the stability of movable seat movement.

Description

Technical Field

[0001] This utility model relates to the field of glass bottle measurement, and in particular to a buffer structure for a bottle mouth measuring mechanism. Background Technology

[0002] On glass bottle production lines, glass forming involves high-temperature and high-pressure environments. During long-term continuous use, the die undergoes multiple forms of wear and tear. First, the die surface suffers thermal fatigue due to repeated contact with molten glass, gradually loosening its microstructure and causing micro-expansion of the mold cavity. Second, mechanical wear of the mold opening and closing mechanism weakens the closing precision, resulting in burrs or uneven wall thickness at the bottle neck seam, causing the bottle neck of the formed glass bottle to be larger than the standard value. Therefore, rapid detection of the bottle neck size is a crucial step in ensuring product qualification rates. Existing detection mechanisms typically include a support base, etc. A movable seat is slidably connected to one side of the support. A drive cylinder is provided on the top of the support to drive the movable seat to slide. A connecting rod is provided at the bottom of the movable seat, and a measuring head is provided at the bottom of the connecting rod. A measuring groove is opened at the bottom of the measuring head. The outline of the measuring groove matches the outer diameter of the standard bottle mouth to be tested. During the test, the glass bottle is transported by the conveyor line to the area directly below the measuring head. The drive cylinder drives the movable seat to move downward, so that the connecting rod drives the measuring groove of the measuring head to fit into the bottle mouth of the glass bottle. If the bottle mouth size is qualified, the measuring groove can be smoothly inserted. If the bottle mouth is too large, the measuring groove cannot fit into the bottle mouth of the glass bottle.

[0003] To prevent excessive impact on the bottle mouth when the measuring head descends, two limiting seats are usually installed on one side of the support base. The two limiting seats are separated to form a limiting interval. The movable seat is located within the limiting interval, and the connecting rod passes through the lower limiting seat. When the measuring head reaches the bottle mouth, the movable seat will collide with the lower limiting seat first, thereby reducing the impact force of the measuring head on the bottle mouth. In addition, to improve the movement stability of the movable seat, a guide rod is installed inside the limiting interval, and a movable groove is opened inside the movable seat. A linear bearing is installed inside the movable groove. The inner ring of the linear bearing slides with the guide rod. However, when the movable seat collides with the lower limiting seat, its impact force will be transmitted to the linear bearing. As a precision sliding component, the internal ball or bushing structure of the linear bearing is extremely sensitive to instantaneous impact. Long-term repeated impacts can easily cause scratches on the inner wall of the linear bearing, deformation of the balls, or even the bearing as a whole detaching from the movable groove, affecting the stability of the movable seat's movement. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a buffer structure for a bottle mouth measuring mechanism. The purpose is to solve the problem that when the movable seat collides with the lower limiting seat, the impact force is transmitted to the linear bearing. As a precision sliding component, the internal ball or bushing structure of the linear bearing is extremely sensitive to instantaneous impact. Long-term repeated impacts can easily lead to scratches on the inner wall of the linear bearing, deformation of the balls, or even the bearing completely disengaging from the movable groove, affecting the stability of the movable seat's movement.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A buffer structure for a bottle mouth measuring mechanism includes a support base, a movable seat slidably connected to one side of the support base, a driving cylinder for driving the movable seat on the top of the support base, two limiting seats on one side of the support base, the two limiting seats being spaced apart to form a limiting interval, the movable seat being located inside the limiting interval, a connecting rod at the bottom of the movable seat, the connecting rod extending through the lower limiting seat, a measuring head at the protruding end of the connecting rod, a measuring groove at the bottom of the measuring head, a guide rod inside the limiting interval, and the movable seat... The movable seat has an internal movable groove, and a linear bearing is installed inside the movable groove. The inner ring of the linear bearing is slidably engaged with the guide rod. The top and bottom of the movable seat have buffer grooves, which are connected to the movable groove. The buffer groove has an installation ring inside, and a buffer spring is installed on one side of the installation ring. One end of the buffer spring has a buffer top ring, which is slidably connected to the adjacent buffer groove, so that one side of the buffer top ring protrudes outside the adjacent buffer groove. The guide rod passes through the inner ring of the buffer top ring and the installation ring.

[0007] When the drive cylinder pushes the movable seat downwards, the movable seat slides along the limit interval, causing the buffer top ring at the bottom of the movable seat to contact the lower limit seat first. The impact force pushes the buffer top ring back into the buffer groove, compressing the buffer spring. The elastic deformation of the buffer spring converts most of the kinetic energy into potential energy for temporary storage. At the same time, the residual energy is gradually dissipated through its own reciprocating vibration, preventing the instantaneous impact peak from being transmitted to the linear bearing, improving the service life of the linear bearing, and preventing long-term repeated impacts from causing scratches on the inner wall of the linear bearing, deformation of the balls, or the bearing as a whole from falling out of the movable groove. At the same time, because the movable seat will collide with the lower limit seat first, the impact force of the measuring head on the mouth of the glass bottle is reduced.

[0008] Furthermore, in this application, the movable groove is provided with two limiting springs, which are separated to form a blocking gap. The linear bearing is located inside the blocking gap, so that both ends of the linear bearing abut against the two limiting springs respectively.

[0009] Two limiting snap rings are tightly attached to the two ends of the linear bearing along its axial direction, forming a fixed-distance blocking gap. This blocking gap is precisely matched with the axial length of the linear bearing, thereby preventing the linear bearing from shifting under impact force.

[0010] Furthermore, in this application, the movable groove has two first mounting ring grooves inside, the limiting spring is annular, the limiting spring has a movable opening on one side, the movable opening is connected to the inner ring of the limiting spring, the limiting spring is elastic, and the two limiting springs are respectively engaged with the two first mounting ring grooves.

[0011] The movable opening design of the retaining spring gives it radial elastic deformation capability. During installation, the retaining spring is compressed to reduce its diameter and pressed into the first mounting ring groove. The retaining spring expands by relying on its elastic restoring force, forming an interference fit with the side wall of the first mounting ring groove to achieve axial locking. When impact force is transmitted to the retaining spring, the ring structure of the retaining spring evenly distributes the impact energy to the entire circumferential contact surface of the first mounting ring groove, avoiding stress concentration and preventing local deformation or cracking.

[0012] Furthermore, in this application, the buffer groove has a second mounting ring groove inside, and a fixing ring is sleeved on the outside of the mounting ring. The fixing ring is elastic and engages with the second mounting ring groove.

[0013] Furthermore, in this application, the mounting ring has an outer mounting groove on its exterior, and the retaining ring is installed inside the outer mounting groove.

[0014] Furthermore, in this application, the buffer groove is provided with multiple guide grooves inside, and the buffer top ring is provided with multiple guide sliders outside, and the multiple guide sliders are respectively slidably engaged with the multiple guide grooves.

[0015] Furthermore, in this application, a first connecting groove is provided on one side of the mounting ring, and first locking protrusions are provided on both sides of the interior of the first connecting groove. The other end of the buffer spring passes through the first connecting groove, so that the first locking protrusions on both sides of the first connecting groove engage with the other end of the buffer spring. A second connecting groove is provided on the other side of the buffer top ring, and second locking protrusions are provided on both sides of the interior of the second connecting groove. One end of the buffer spring passes through the second connecting groove, so that the second locking protrusions on both sides of the second connecting groove engage with one end of the buffer spring.

[0016] Furthermore, in this application, a buffer pad ring is provided on one side of the buffer top ring, and the buffer pad ring is elastic.

[0017] Furthermore, in this application, the protruding end of the connecting rod is provided with a mounting plate, the measuring head is detachably connected to the bottom of the mounting plate, the mounting plate has a first fixing hole inside, the measuring head has a second fixing hole at the top, a fixing bolt is inserted in the first fixing hole, and the fixing bolt is threaded into the second fixing hole.

[0018] Furthermore, in this application, the bottom of the mounting plate is provided with a positioning slot, and the top of the measuring head is provided with a positioning plug, which is inserted into the positioning slot.

[0019] This utility model has the following beneficial effects:

[0020] When the drive cylinder pushes the movable seat downwards, the movable seat slides along the limit interval, causing the buffer top ring at the bottom of the movable seat to contact the lower limit seat first. The impact force pushes the buffer top ring back into the buffer groove, compressing the buffer spring. The elastic deformation of the buffer spring converts most of the kinetic energy into potential energy for temporary storage. At the same time, the residual energy is gradually dissipated through its own reciprocating vibration, preventing the instantaneous impact peak from being transmitted to the linear bearing, improving the service life of the linear bearing, and preventing long-term repeated impacts from causing scratches on the inner wall of the linear bearing, deformation of the balls, or the bearing as a whole from falling out of the movable groove. At the same time, because the movable seat will collide with the lower limit seat first, the impact force of the measuring head on the mouth of the glass bottle is reduced. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the movable seat of this utility model.

[0023] Figure 3 This is a schematic diagram of the mounting plate of this utility model.

[0024] Figure 4 This is a structural schematic diagram of the fixing bolt of this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the movable groove of this utility model.

[0026] Figure 6 This is a schematic diagram of the buffer groove of this utility model.

[0027] Figure 7 This is a schematic diagram of the limiting snap ring of this utility model.

[0028] Figure 8 This is a schematic diagram of the guide groove of this utility model.

[0029] Figure 9This is a schematic diagram of the structure of the buffer spring of this utility model.

[0030] Figure 10 This is a schematic diagram of the mounting ring of this utility model.

[0031] Figure 11 This is a schematic diagram of the structure of the buffer top ring of this utility model.

[0032] In the attached figures, the following labels are used:

[0033] 1. Support base; 2. Drive cylinder; 3. Limit seat; 4. Limit interval; 5. Movable seat; 6. Connecting rod; 7. Mounting plate; 8. Measuring head; 9. Positioning plug; 10. Positioning slot; 11. First fixing hole; 12. Second fixing hole; 13. Fixing bolt; 14. Movable groove; 15. Linear bearing; 16. Buffer groove; 17. First mounting ring groove; 18. Second mounting ring groove; 19. Limiting snap ring; 20. Blocking interval; 21. Movable opening; 22. Mounting ring; 23. Mounting outer groove; 24. Fixing snap ring; 25. Buffer spring; 26. Buffer top ring; 27. Buffer pad ring; 28. Guide slider; 29. ​​First connecting groove; 30. First locking protrusion; 31. Second connecting groove; 32. Second locking protrusion; 33. Guide slide groove; 34. Guide rod; 35. Measuring groove. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Reference Figures 1-11 In some specific embodiments, a buffer structure for a bottle mouth measuring mechanism includes a support base 1, a movable seat 5 slidably connected to one side of the support base 1, a driving cylinder 2 for driving the movable seat 5 on the top of the support base 1, two limiting seats 3 on one side of the support base 1, the two limiting seats 3 being spaced apart to form a limiting interval 4, the movable seat 5 being located inside the limiting interval 4, a connecting rod 6 at the bottom of the movable seat 5, the connecting rod 6 passing through the lower limiting seat 3, a measuring head 8 at the end of the connecting rod 6, a measuring groove 35 at the bottom of the measuring head 8, a guide rod 34 inside the limiting interval 4, and the movable seat 5... The movable seat 5 has an internal movable groove 14, and a linear bearing 15 is installed inside the movable groove 14. The inner ring of the linear bearing 15 is slidably engaged with the guide rod 34. The top and bottom of the movable seat 5 have buffer grooves 16, which are connected to the movable groove 14. The buffer groove 16 has an installation ring 22 inside, and a buffer spring 25 is installed on one side of the installation ring 22. A buffer top ring 26 is installed at one end of the buffer spring 25. The buffer top ring 26 is slidably connected to the adjacent buffer groove 16, so that one side of the buffer top ring 26 protrudes out of the adjacent buffer groove 16. The guide rod 34 passes through the inner ring of the buffer top ring 26 and the installation ring 22.

[0038] Through the above technical solution, when the drive cylinder 2 pushes the movable seat 5 downward, the movable seat 5 will slide along the limiting interval 4, so that the buffer top ring 26 at the bottom of the movable seat 5 will first contact the lower limiting seat 3. The impact force pushes the buffer top ring 26 to retract into the buffer groove 16, compressing the buffer spring 25. The elastic deformation of the buffer spring 25 converts most of the kinetic energy into potential energy for temporary storage. At the same time, it gradually dissipates the residual energy through its own reciprocating vibration, avoiding the instantaneous impact peak from being transmitted to the linear bearing 15, improving the service life of the linear bearing 15, and preventing long-term repeated impacts from causing scratches on the inner wall of the linear bearing 15, deformation of the balls, or the bearing as a whole from falling out of the movable groove 14. At the same time, since the movable seat 5 will collide with the lower limiting seat 3 first, the impact force of the measuring head 8 on the bottle mouth is reduced.

[0039] Furthermore, after the measuring head 8 measures the mouth of the glass bottle, the drive cylinder 2 will retract, causing the movable seat 5 to move upward. At this time, the movable seat 5 will move towards the upper limit seat 3, so that the buffer top ring 26 on the top of the movable seat 5 will contact the upper limit seat 3 first. The impact force pushes the buffer top ring 26 back into the buffer groove 16. The buffer spring 25 buffers the impact force, thereby preventing the impact force from damaging the linear bearing 15 when the movable seat 5 resets.

[0040] It should be noted that, since the guide rod 34 passes through the inner ring of the buffer top ring 26 and the mounting ring 22, it always constrains the movement trajectory of the buffer top ring 26 during the buffering process, preventing the buffer top ring 26 from laterally swaying due to the compression of the buffer spring 25.

[0041] Reference Figures 5-6 In some specific embodiments, the movable groove 14 is provided with two limiting springs 19, which are separated to form a blocking gap 20. The linear bearing 15 is located inside the blocking gap 20, so that the two ends of the linear bearing 15 abut against the two limiting springs 19 respectively.

[0042] Through the above technical solution, the two limiting snap rings 19 are respectively tightly attached to the two ends of the axial direction of the linear bearing 15 to form a fixed-distance blocking gap 20. The blocking gap 20 is precisely matched with the axial length of the linear bearing 15, thereby preventing the linear bearing 15 from displacing under impact force.

[0043] Reference Figures 5-7 In some specific embodiments, the movable groove 14 has two first mounting ring grooves 17 inside, the limiting spring 19 is annular, and a movable opening 21 is provided on one side of the limiting spring 19. The movable opening 21 connects to the inner ring of the limiting spring 19. The limiting spring 19 is elastic, and the two limiting springs 19 are respectively engaged with the two first mounting ring grooves 17.

[0044] Through the above technical solution, the movable opening 21 of the limiting snap ring 19 is designed to have radial elastic deformation capability. During installation, the diameter of the limiting snap ring 19 is reduced by squeezing it and pressing it into the first mounting ring groove 17. The limiting snap ring 19 expands by relying on elastic restoring force and forms an interference fit with the side wall of the first mounting ring groove 17 to achieve axial clamping. When the impact force is transmitted to the limiting snap ring 19, the annular structure of the limiting snap ring 19 will evenly distribute the impact energy to the entire circumferential contact surface of the first mounting ring groove 17, avoiding stress concentration and preventing local deformation or cracking.

[0045] Reference Figures 5-11 In some specific embodiments, a second mounting ring groove 18 is provided inside the buffer groove 16, and a fixing ring 24 is sleeved on the outside of the mounting ring 22. The fixing ring 24 is elastic and engages with the second mounting ring groove 18.

[0046] Through the above technical solution, the retaining ring 24 is usually made of rubber or silicone material, and the outer diameter of the retaining ring 24 in its natural state is slightly larger than the inner diameter of the second mounting ring groove 18. During installation, the retaining ring 24 is temporarily deformed by squeezing it, and after being embedded in the second mounting ring groove 18, it forms a tight fit with the second mounting ring groove 18 by relying on the elastic force of the material, thereby fixing the position of the mounting ring 22.

[0047] Reference Figure 9 In some specific embodiments, the mounting ring 22 has an outer mounting groove 23 on its outside, and the fixing ring 24 is installed inside the outer mounting groove 23.

[0048] Through the above technical solution, an outer groove 23 is machined on the outer cylindrical surface of the mounting ring 22. The groove depth and width are designed according to the cross-sectional dimensions of the fixing ring 24. During installation, the fixing ring 24 is pulled open and inserted into the outer groove 23. It relies on its elastic restoring force to form a radial interference fit with the outer groove 23, thereby fixing the position of the fixing ring 24 and preventing the fixing ring 24 from detaching from the mounting ring 22 during use.

[0049] Reference Figures 6-11 In some specific embodiments, the buffer groove 16 has multiple guide grooves 33 inside, and the buffer top ring 26 has multiple guide sliders 28 outside, and the multiple guide sliders 28 slide in cooperation with the multiple guide grooves 33 respectively.

[0050] With the above technical solution, when the impact force pushes the buffer top ring 26 to retract into the buffer groove 16, multiple guide sliders 28 slide in conjunction with multiple guide grooves 33 respectively. The rigid sidewall of the guide groove 33 restricts the lateral displacement of the guide sliders 28, ensuring that the buffer top ring 26 can only move along a single axis, eliminating the risk of swaying.

[0051] Reference Figures 9-11 In some specific embodiments, a first connecting groove 29 is provided on one side of the mounting ring 22, and a first locking protrusion 30 is provided on both sides of the interior of the first connecting groove 29. The other end of the buffer spring 25 passes through the first connecting groove 29, so that the first locking protrusions 30 on both sides of the first connecting groove 29 are engaged with the other end of the buffer spring 25. A second connecting groove 31 is provided on the other side of the buffer top ring 26, and a second locking protrusion 32 is provided on both sides of the interior of the second connecting groove 31. One end of the buffer spring 25 passes through the second connecting groove 31, so that the second locking protrusions 32 on both sides of the second connecting groove 31 are engaged with one end of the buffer spring 25.

[0052] With the above technical solution, the two ends of the buffer spring 25 are respectively inserted into the first connecting groove 29 and the second connecting groove 31. The first locking protrusion 30 and the second locking protrusion 32 on both sides of the first connecting groove 29 and the second connecting groove 31 radially clamp the coils at both ends of the buffer spring 25, thereby preventing the buffer spring 25 from falling out of the installation position and ensuring the stability of the buffer spring 25 during buffering.

[0053] Reference Figures 5-11 In some specific embodiments, a buffer pad ring 27 is provided on one side of the buffer top ring 26, and the buffer pad ring 27 is elastic.

[0054] Through the above technical solution, the buffer pad ring 27 serves as the intermediate contact body between the buffer top ring 26 and the limiting seat 3, replacing the rigid collision between the buffer top ring 26 and the limiting seat 3 in the traditional design, thereby preventing the limiting seat 3 from deforming under impact force.

[0055] Reference Figures 1-4 In some specific embodiments, the protruding end of the connecting rod 6 is provided with a mounting plate 7, the measuring head 8 is detachably connected to the bottom of the mounting plate 7, the mounting plate 7 has a first fixing hole 11 inside, the measuring head 8 has a second fixing hole 12 at the top, a fixing bolt 13 is inserted in the first fixing hole 11, and the fixing bolt 13 is threadedly engaged with the second fixing hole 12.

[0056] Through the above technical solution, the mounting plate 7 serves as a standardized connection interface. By matching the first fixing hole 11 and the second fixing hole 12, the installation reference of measuring heads 8 of different specifications is unified, which is convenient for testing the mouths of glass bottles of various sizes. Furthermore, the fixing bolt 13 passes through the first fixing hole 11 and the second fixing hole 12 and is tightened to form a rigid mechanical lock, preventing the measuring head 8 from shifting or shaking during the testing process.

[0057] Reference Figures 1-4 In some specific embodiments, the bottom of the mounting plate 7 is provided with a positioning slot 10, and the top of the measuring head 8 is provided with a positioning plug 9, which is inserted into the positioning slot 10.

[0058] With the above technical solution, when the measuring head 8 is installed at the bottom of the mounting plate 7, the positioning plug 9 is inserted into the positioning slot 10, so that the first fixing hole 11 and the second fixing hole 12 are aligned, thereby facilitating the fixing of the measuring head 8.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A buffer structure for a bottle mouth measuring mechanism, comprising a support base, a movable seat slidably connected to one side of the support base, a driving cylinder for driving the movable seat being provided at the top of the support base, two limiting seats being provided on one side of the support base, the two limiting seats being spaced apart to form a limiting interval, the movable seat being located inside the limiting interval, a connecting rod being provided at the bottom of the movable seat, the connecting rod extending through the lower limiting seat, a measuring head being provided at the protruding end of the connecting rod, a measuring groove being formed at the bottom of the measuring head, a guide rod being provided inside the limiting interval, a movable groove being formed inside the movable seat, a linear bearing being provided inside the movable groove, the inner ring of the linear bearing being slidably engaged with the guide rod, characterized in that… The movable seat has buffer grooves at its top and bottom, which are connected to the movable groove. The buffer groove has a mounting ring inside, and a buffer spring is provided on one side of the mounting ring. One end of the buffer spring has a buffer top ring, which is slidably connected to the adjacent buffer groove, so that one side of the buffer top ring protrudes outside the adjacent buffer groove. The guide rod passes through the inner ring of the buffer top ring and the mounting ring.

2. The buffer structure of the bottle mouth measuring mechanism according to claim 1, characterized in that, The movable groove is provided with two limiting springs, which are separated to form a blocking gap. The linear bearing is located inside the blocking gap, so that both ends of the linear bearing abut against the two limiting springs respectively.

3. The buffer structure of the bottle mouth measuring mechanism according to claim 2, characterized in that, The movable groove has two first mounting ring grooves inside. The limiting spring is circular and has a movable opening on one side. The movable opening connects to the inner ring of the limiting spring. The limiting spring is elastic and the two limiting springs are respectively engaged with the two first mounting ring grooves.

4. The buffer structure of the bottle mouth measuring mechanism according to claim 1, characterized in that, The buffer groove has a second mounting ring groove inside, and a fixing ring is fitted on the outside of the mounting ring. The fixing ring is elastic and engages with the second mounting ring groove.

5. The buffer structure of the bottle mouth measuring mechanism according to claim 4, characterized in that, The mounting ring has an outer mounting groove, and the retaining ring is installed inside the outer mounting groove.

6. The buffer structure of the bottle mouth measuring mechanism according to claim 1, characterized in that, The buffer groove has multiple guide grooves inside, and the buffer top ring has multiple guide sliders on the outside. The multiple guide sliders slide in cooperation with the multiple guide grooves respectively.

7. The buffer structure of the bottle mouth measuring mechanism according to claim 1, characterized in that, A first connecting groove is provided on one side of the mounting ring, and a first locking protrusion is provided on both sides of the interior of the first connecting groove. The other end of the buffer spring passes through the first connecting groove, so that the first locking protrusions on both sides of the first connecting groove engage with the other end of the buffer spring. A second connecting groove is provided on the other side of the buffer top ring, and a second locking protrusion is provided on both sides of the interior of the second connecting groove. One end of the buffer spring passes through the second connecting groove, so that the second locking protrusions on both sides of the second connecting groove engage with one end of the buffer spring.

8. The buffer structure of the bottle mouth measuring mechanism according to claim 1, characterized in that, A buffer pad ring is provided on one side of the buffer top ring, and the buffer pad ring is elastic.

9. The buffer structure of the bottle mouth measuring mechanism according to claim 1, characterized in that, The protruding end of the connecting rod is provided with a mounting plate. The measuring head is detachably connected to the bottom of the mounting plate. A first fixing hole is opened inside the mounting plate, and a second fixing hole is opened on the top of the measuring head. A fixing bolt is inserted in the first fixing hole, and the fixing bolt is threaded into the second fixing hole.

10. The buffer structure of the bottle mouth measuring mechanism according to claim 9, characterized in that, The mounting plate has a positioning slot at its bottom and a positioning plug at its top. The positioning plug is inserted into the positioning slot.

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