Pressing and turning tool for filter seal ring assembling machine

Abstract

The utility model relates to a press material turnover tool for filter seal ring assembling machine, which is composed of a pressing seat, a pushing mechanism (including a pushing cylinder and an outer / inner pushing sleeve), a feeding assembly (a feeding belt, a receiving plate, and a pushing plate), and circumferentially distributed flanging columns. The feeding assembly automatically feeds the seal ring to the pressing hole, the pushing mechanism pushes the seal ring to move, and the flanging columns guide the seal ring to turn over by resistance, achieving automatic and accurate installation. The adjustable inner pushing seat and the damping buffer improve the adaptability and stability.

Description

Technical Field

[0001] This utility model specifically relates to a pressure turning tool for a filter sealing ring assembly machine. Background Technology

[0002] To improve the reliability of the sealing ring and the filter mounting location, a special-shaped sealing ring needs to be installed below the filter, such as... Figure 1 The irregular sealing ring shown includes an annular sealing part and an annular hook body for engaging with the filter mounting part. The inner diameter of the annular hook body is smaller than the diameter of the mounting part on the filter. During installation, the irregular sealing ring needs to be flipped inside out to achieve the desired fit. Figure 2 The state shown indicates that the annular hook is facing outwards. For example, document CN13146208B discloses a pressing assembly for assembling a sealing ring under the filter; however, this prior art cannot achieve the function of flipping the irregularly shaped sealing ring inwards or outwards, and therefore cannot install the aforementioned irregularly shaped sealing ring onto the filter. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a pressing and flipping tool for a filter sealing ring assembly machine. Through the mechanical interference of the flange, the deformation direction of the sealing ring is changed, achieving inward and outward flipping, so that the annular hook changes from an "inward state" to an "outward state", and finally tightly engages with the filter installation part.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressing and turning fixture for a filter sealing ring assembly machine, comprising a frame and a pressing seat fixed on the frame. The side of the pressing seat is provided with a feed groove for transporting the sealing ring toward the pressing seat. The pressing seat is provided with a pressing hole that penetrates the pressing seat axially. The pressing hole is connected to the feed groove, and the sealing ring falls into the pressing hole from the feed groove. A pushing mechanism mounted on the frame is provided in the pressing hole. The pushing mechanism is used to push the sealing ring in the pressing hole to move axially along the pressing hole. The feature is that: the pressing hole is provided with a plurality of sets of flanges, which are arranged sequentially at intervals along the circumference of the pressing hole, and one end of the flange extends toward the inside of the pressing hole until one end of the flange protrudes from the inner circumferential surface of the pressing hole.

[0005] This application can be further configured such that: the flanged part is a flanged post, and the pressing seat is provided with a set of positioning holes for each set of flanged posts; the flanged post is inserted into the positioning hole, and one end of the flanged post extends toward the inside of the pressing hole until one end of the flanged post protrudes from the inner circumferential surface of the pressing hole.

[0006] This application can be further configured such that: one end of the flange post facing the press-fit hole is provided with a tapered head, and the end of the tapered head facing the press-fit hole is provided with a scratch-resistant plane arranged parallel to the axial direction of the press-fit hole.

[0007] This application can be further configured such that the flanged post is made of rubber.

[0008] This application can be further configured as follows: the pressing seat includes an upper pressing seat body and a lower pressing seat body arranged sequentially along the axial direction of the pressing hole; the positioning hole is provided on the end face of the lower pressing seat body facing the upper pressing seat body; the positioning hole is open in the direction facing the upper pressing seat body; the upper pressing seat body is provided with a plurality of sets of countersunk holes; the lower pressing seat body is provided with a set of set holes corresponding to each set of countersunk holes; each set of countersunk holes and set holes are detachably connected by fasteners.

[0009] This application can be further configured as follows: the pushing mechanism includes a pushing cylinder and an outer pushing sleeve that is linked to the output end of the pushing cylinder. The outer pushing sleeve is provided with a mounting hole, and an inner pushing seat is inserted into the mounting hole. The upper end of the inner pushing seat is higher than the upper end of the outer pushing sleeve, and the upper end of the outer pushing sleeve is provided with an annular inner groove.

[0010] This application can be further configured such that: a threaded sleeve is fixed inside the lower part of the mounting hole, the threaded sleeve is connected to an adjusting bolt, the inner push seat is provided with a connecting hole corresponding to the adjusting bolt, and an adjustment clearance hole is provided below the connecting hole, the inner diameter of the adjustment clearance hole being larger than the outer diameter of the threaded sleeve.

[0011] This application can be further configured as follows: a feeding assembly is provided on the frame, the feeding assembly includes a feeding belt and a pulley transmission mechanism for controlling the movement of the feeding belt, an upper receiving plate is connected to the end of the feeding belt, a lower receiving plate is provided below the upper receiving plate, the end of the lower receiving plate away from the upper receiving plate corresponds to the feed groove, a pusher plate is provided between the upper receiving plate and the lower receiving plate, the pusher plate is linked to a pusher cylinder for driving the pusher plate to reciprocate toward the pressing seat, a strip-shaped relief groove is provided at the end of the upper receiving plate away from the feeding belt, a guide hole is provided on the pusher plate corresponding to the strip-shaped relief groove, a pull rod is provided in the guide hole, the pull rod is linked to a puller cylinder for driving the pull rod to reciprocate along the axial direction of the guide hole, and the body of the puller cylinder is linked to the pusher plate.

[0012] This application can be further configured such that: two sets of damping buffers are installed below the lower connecting plate, the two sets of damping buffers are symmetrically distributed on both sides of the pusher plate, and the pusher plate is linked to the limit buffer plate.

[0013] The beneficial effects of this utility model are:

[0014] This system enables the sealing ring to flip inside and out (the annular hook body flips from the inside to the outside). After flipping, the radial dimension of the annular hook body expands due to deformation, allowing it to tightly engage with the filter installation area (whose diameter is larger than the original diameter of the hook's inner bore), thus completing a reliable installation. It replaces manual flipping, automating the entire process of feeding, pushing, and flipping, improving production efficiency and product consistency.

[0015] The design features a detachable flange post, a split pressing seat structure, and an adjustable internal push seat height, allowing for quick replacement / adjustment of flange post parameters or switching of the lower pressing seat body. It is also compatible with irregularly shaped sealing rings of different thicknesses and hook sizes.

[0016] The circumferentially evenly distributed flange posts prevent uneven flipping; the rubber flange posts buffer impact, the conical head reduces contact resistance, and the scratch-resistant surface protects the sealing ring surface, ensuring smooth and undamaged flipping.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the irregularly shaped sealing ring used in an embodiment of the present utility model.

[0019] Figure 2 This is a cross-sectional view of the irregularly shaped sealing ring used in this embodiment of the utility model after it has been flipped over.

[0020] Figure 3 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic cross-sectional view of an embodiment of the present utility model;

[0022] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0023] Figure 6 for Figure 4 Enlarged view of a portion of point B in the middle;

[0024] Figure 7 This is a bottom view of an embodiment of the present utility model;

[0025] Figure 8 This is a schematic diagram of the pressing seat according to an embodiment of the present utility model;

[0026] Figure 9 This is an exploded schematic diagram of the pressing seat according to an embodiment of the present utility model. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 9 The filter seal ring assembly machine shown includes a press-and-turn fixture, comprising a frame and a pressing seat 1 fixed to the frame. The pressing seat 1 has a feed groove 2 on its side for transporting the seal ring into the pressing seat 1. The pressing seat 1 has a pressing hole 3 extending axially through the pressing seat 1. The pressing hole 3 communicates with the feed groove 2, and the seal ring falls into the pressing hole 3 through the feed groove 2. A pushing mechanism mounted on the frame is installed in the pressing hole 3, which pushes the seal ring within the pressing hole 3 to move axially along the pressing hole 3. The pressing hole 3 has six sets of flanged parts, arranged sequentially and spaced apart along the circumference of the pressing hole 3, with one end of each flange extending towards the inside of the pressing hole 3 until one end protrudes from the inner circumferential surface of the pressing hole 3. When the irregularly shaped seal ring falls into the pressing hole 3 through the feed groove 2, the pushing mechanism pushes the seal ring to move axially (usually upwards) along the pressing hole 3. Because the inner circumferential surface of the pressing hole 3 has protruding flanges (distributed circumferentially), the edge of the sealing ring will contact the protruding end of the flange and be subject to circumferential resistance during movement. As the pushing mechanism continuously applies axial thrust, the sealing ring undergoes local deformation under the resistance of the flanges—the part not blocked by the flanges moves forward with the pushing mechanism, while the part blocked by the flanges folds backward (or radially outward) due to the resistance, ultimately achieving overall inward and outward flipping (the annular hook body flips from the inside to the outside). After flipping, the radial dimension of the annular hook body expands due to deformation, and it fits tightly with the filter installation part (the diameter is larger than the original diameter of the inner hole of the hook body), completing reliable installation. This process actively guides the flipping of the sealing ring through the physical interference of the flanges, replacing the inefficiency and error of manual flipping, and realizing automated and precise installation of irregular-shaped sealing rings.

[0030] This application can be further configured as follows: the flanged part is a flanged post 5, and the pressing seat 1 is provided with a set of positioning holes 4 for each set of flanged posts 5. The flanged post 5 is inserted into the positioning hole 4, and one end of the flanged post 5 extends towards the inside of the pressing hole 3 until one end of the flanged post 5 protrudes from the inner circumferential surface of the pressing hole 3. On the one hand, the flanged post 5 is inserted into the pressing seat 1 through the positioning hole 4, realizing the detachable connection between the flanged post 5 and the pressing seat 1. This not only ensures the structural strength of the flanged post 5 when it is subjected to the resistance of the sealing ring during the pressing process (avoiding detachment or displacement), but also facilitates the replacement or adjustment of parameters such as the diameter and protrusion length of the flanged post 5 according to different specifications of non-standard sealing rings (such as different thicknesses and hook sizes). For example, replacing the flanged post 5 with a shorter one to adapt to a thin sealing ring, or replacing the flanged post 5 with a thicker one to enhance the resistance of the turning, thereby improving the tooling's adaptability to diverse non-standard sealing rings. On the other hand, multiple sets of flange posts 5 are evenly distributed circumferentially along the press-fit hole 3 (with consistent spacing), avoiding problems such as uneven flipping of the sealing ring and local jamming caused by deviations in the position of the flanged parts, thereby ensuring the stability of the flipping process and the consistency of the finished product quality. This application can be further configured such that: one end of the flange post 5 facing the press-fit hole 3 is provided with a tapered head 6, and the end of the tapered head 6 facing the press-fit hole 3 is provided with a scratch-resistant surface 7 arranged parallel to the axial direction of the press-fit hole 3. The tapered head 6 can reduce the initial contact resistance when the flange post 5 contacts the sealing ring through a "guiding effect" (avoiding the end of the flange post 5 directly "colliding" with the edge of the sealing ring, causing jamming or excessive local deformation), allowing the edge of the sealing ring to be more naturally guided to the outside of the flange post 5 along the tapered slope, improving the smoothness of the flipping process. The scratch-resistant surface 7 prevents the flange post 5 from scratching the surface of the sealing ring when pushing it to flip.

[0031] This application can be further configured such that the flange post 5 is made of rubber. Rubber has good elasticity and cushioning properties, and can absorb some of the impact force through its own deformation upon contact, avoiding hard collisions. At the same time, rubber has a high coefficient of friction, providing sufficient resistance to guide the sealing ring to flip, ensuring the flipping function is achieved while preventing scratches on the sealing ring.

[0032] This application can be further configured as follows: the pressing seat 1 includes an upper pressing seat body 8 and a lower pressing seat body 9 arranged sequentially along the axial direction of the pressing hole 3. A positioning hole 4 is provided on the end face of the lower pressing seat body 9 facing the upper pressing seat body 8, and the positioning hole 4 is open in the direction facing the upper pressing seat body 8. The upper pressing seat body 8 is provided with several sets of countersunk holes 10, and the lower pressing seat body 9 is provided with a set of set holes 11 corresponding to each set of countersunk holes 10. Each set of countersunk holes 10 and set holes 11 are detachably connected by fasteners. The upper and lower seats can be separated by simply removing the fasteners, and the flanged posts 5 on the lower pressing seat body 9 can be directly inspected, replaced, or adjusted (such as increasing or decreasing the number of flanged posts 5 or adjusting the interval distance) without disassembling the entire pressing seat 1 or damaging other structures. Meanwhile, by replacing the lower pressure seat body 9 with different specifications (such as to adapt to different diameter press-fit holes 3 or flanged column 5 layouts), the tooling can be quickly switched to adapt to different models of non-shaped sealing rings, which greatly improves the flexibility and versatility of the tooling.

[0033] This application can be further configured as follows: the pushing mechanism includes a pushing cylinder 12 and an outer pushing sleeve 13 linked to the output end of the pushing cylinder 12. The outer pushing sleeve 13 is provided with a mounting hole, and an inner pushing seat 14 is inserted into the mounting hole. The upper end of the inner pushing seat 14 is higher than the upper end of the outer pushing sleeve 13, and the upper end of the outer pushing sleeve 13 is provided with an annular inner groove 15. The outer pushing sleeve 13 is nested with the inner pushing seat 14 through the mounting hole. The upper end of the inner pushing seat 14 is higher than the outer pushing sleeve 13 (forming a "height difference" structure), which can respectively contact the annular barb and the annular sealing part of the sealing ring, preventing it from sliding or shifting radially during the pushing process.

[0034] This application can be further configured as follows: a threaded sleeve 16 is fixed inside the lower part of the mounting hole, the threaded sleeve 16 is connected to an adjusting bolt 17, the inner push seat 14 is provided with a connecting hole 18 corresponding to the adjusting bolt 17, and an adjusting clearance hole 19 is provided below the connecting hole 18, the inner diameter of the adjusting clearance hole 19 being larger than the outer diameter of the threaded sleeve 16. It should be noted that the outer push sleeve 13 and the inner push seat 14 are in transition fit.

[0035] This design allows for the positioning of the inner push seat 14 on the outer push sleeve 13 to accommodate sealing rings of different specifications. When the height of the inner push seat 14 needs adjustment, the adjusting bolt 17 is rotated. Since the threaded sleeve 16 is fixed inside the lower part of the mounting hole (relatively stationary to the outer push sleeve 13), the external thread of the adjusting bolt 17 engages with the internal thread of the threaded sleeve 16, and rotating the bolt will cause it to move axially (up and down). At this time, the upper end of the adjusting bolt 17 passes through the connecting hole 18 of the inner push seat 14, pushing or pulling the inner push seat 14 axially along the mounting hole (because the outer push sleeve 13 and the inner push seat 14 are in a transition fit, the inner push seat 14 can slide within the mounting hole but without radial wobble). The transition fit (outer push sleeve 13 and inner push seat 14) maintains the positional stability of the inner push seat 14 through a moderate tightness after adjustment (it will not shift due to looseness, nor will it hinder adjustment due to excessive tightness).

[0036] This application can be further configured as follows: a feeding assembly is provided on the frame, the feeding assembly includes a feeding belt 20 and a pulley transmission mechanism for controlling the movement of the feeding belt 20, an upper receiving plate 21 is connected to the end of the feeding belt 20, a lower receiving plate 22 is provided below the upper receiving plate 21, the end of the lower receiving plate 22 away from the upper receiving plate 21 corresponds to the feed groove 2, a pusher plate 23 is provided between the upper receiving plate 21 and the lower receiving plate 22, the pusher plate 23 is linked with a pusher cylinder 24 for driving the pusher plate 23 to reciprocate toward the pressing seat 1, the end of the upper receiving plate 21 away from the feeding belt 20 is provided with a strip-shaped relief groove 25, the pusher plate 23 is provided with a guide hole 26 corresponding to the strip-shaped relief groove 25, a pull rod 27 is provided in the guide hole 26, the pull rod 27 is linked with a puller cylinder 28 for driving the pull rod 27 to reciprocate along the axial direction of the guide hole 26, and the body of the puller cylinder 28 is linked with the pusher plate 23.

[0037] When the pulley drive mechanism is activated, the feeding belt 20 continuously conveys the irregularly shaped sealing rings to be pressed onto the upper receiving plate 21. The pushing cylinder 24 drives the pushing plate 23 to move towards the pressing seat 1 (initially close to the upper receiving plate 21). At the same time, the pulling cylinder 28 is activated, driving the pulling rod 27 to extend outward along the guide hole 26 of the pushing plate 23 (passing through the strip relief groove 25 of the upper receiving plate 21) and insert into the middle of the sealing ring. The pushing cylinder 24 continues to advance, and the pulling rod 27 drives the sealing ring to move along the surface of the upper receiving plate 21 towards the pressing seat 1 (the strip relief groove 25 provides a moving path for the pulling rod 27, avoiding interference with the upper receiving plate 21), until the sealing ring falls onto the lower receiving plate 22. The pulling cylinder 28 then drives the pulling rod 27 in the opposite direction to retract (disengage from the sealing ring). The pusher cylinder 24 then reverses and drives the pusher plate 23 to reset, and the puller cylinder 28 drives the puller rod 27 to extend again, entering the next feeding cycle. Notably, during the movement of the pusher plate 23, the sealing ring at the lower receiving plate 22 is pushed into the pressing seat 1, completing the synchronous feeding and pushing.

[0038] This application can be further configured as follows: two sets of damping buffers 29 are installed below the lower connecting plate, and the two sets of damping buffers 29 are symmetrically distributed on both sides of the pusher plate 23. The pusher plate 23 is linked to the limiting buffer plate 30. The two sets of symmetrically distributed damping buffers 29 achieve flexible deceleration by absorbing the kinetic energy of the pusher plate 23, while the limiting buffer plate 30 acts as a force transmission medium to evenly transmit the impact force to the buffer (avoiding local damage caused by single-point force). The combination of the two makes the start and stop process of the pusher plate 23 smooth and controllable, and avoids excessive displacement when the pusher plate 23 reciprocates.

[0039] The working principle of this embodiment is as follows: The feeding belt 20 transports the sealing rings to the upper receiving plate 21 in an orderly manner. The pull rod 27 on the pusher plate 23 extends and inserts into the middle of a set of sealing rings. At the same time, the pusher cylinder 24 drives the pusher plate 23 to move towards the pressing seat 1, and a set of sealing rings is transported to the lower receiving plate 22. During this period, a set of sealing rings already exists on the lower receiving plate 22, and the pusher plate 23 will synchronously push the set of sealing rings into the pressing seat 1. After the sealing rings fall into the pressing hole 3 through the feeding groove 2, the pushing mechanism pushes the sealing rings to move axially (usually upward) along the pressing hole 3. Since the inner circumferential surface of the pressing hole 3 is provided with protruding flange posts 5 (distributed circumferentially), during the movement of the sealing rings, their edges will contact the protruding ends of the flange posts 5 and be subject to circumferential resistance. As the jacking mechanism continuously applies axial thrust, the sealing ring undergoes localized deformation under the resistance of the flanged post 5. The portion not blocked by the flanged post 5 advances with the jacking mechanism, while the portion blocked by the flanged post 5 folds backward (or radially outward) due to the resistance, ultimately achieving overall inward and outward rotation (the annular hook body flips from the inside to the outside). After rotation, the radial dimension of the annular hook body expands due to deformation, precisely engaging with the filter installation part (whose diameter is larger than the original diameter of the hook's inner bore), completing reliable installation. This process actively guides the sealing ring rotation through the physical interference of the flanged post 5, replacing the inefficiency and error of manual rotation, and achieving automated and precise installation of irregularly shaped sealing rings.

Claims

1. A pressure-turning fixture for a filter sealing ring assembly machine, comprising a frame and a pressing seat fixed on the frame, wherein the pressing seat has a feed groove on its side for transporting the sealing ring toward the pressing seat, the pressing seat has a pressing hole extending through the pressing seat axially, the pressing hole communicating with the feed groove and the sealing ring falling into the pressing hole from the feed groove, and a pushing mechanism mounted on the frame is provided in the pressing hole, the pushing mechanism being used to push the sealing ring in the pressing hole to move axially along the pressing hole, characterized in that: A number of groups of flanging members are provided in the press-fitting hole. The several groups of flanging members are arranged at intervals in sequence along the circumferential direction of the press-fitting hole, and one end of the flanging member extends towards the inside of the press-fitting hole until one end of the flanging member protrudes from the inner peripheral surface of the press-fitting hole.

2. The pressure turning fixture for the filter sealing ring assembly machine according to claim 1, characterized in that: The flanging member is a flanging column. The pressing seat is provided with a set of positioning holes corresponding to each group of flanging columns respectively. The flanging column is inserted into the positioning hole, and one end of the flanging column extends towards the inside of the press-fitting hole until one end of the flanging column protrudes from the inner peripheral surface of the press-fitting hole.

3. The pressure turning fixture for the filter sealing ring assembly machine according to claim 2, characterized in that: The end of the flanging column facing the inside of the press-fitting hole is provided with a conical head, and the end of the conical head facing the press-fitting hole is provided with an anti-scratch plane arranged parallel to the axial direction of the press-fitting hole.

4. The pressing and flipping tooling for the filter seal ring assembling machine according to claim 2, wherein: The flanging column is made of rubber.

5. The pressing and flipping tooling for the filter seal ring assembling machine according to any one of claims 2 to 4, wherein: The pressing seat includes an upper pressing seat body and a lower pressing seat body arranged in sequence along the axial direction of the press-fitting hole. The positioning hole is arranged on the end face of the lower pressing seat body facing the upper pressing seat body. The positioning hole is open towards the upper pressing seat body. A number of groups of counterbore holes are provided on the upper pressing seat body. The lower pressing seat body is provided with a set of set screw holes corresponding to each group of counterbore holes respectively. Each group of counterbore holes and set screw holes are detachably connected by setting fasteners.

6. The pressing and flipping tooling for the filter seal ring assembling machine according to any one of claims 1 to 4, characterized in that: The pushing mechanism includes a pushing cylinder and an outer pushing sleeve linked to the output end of the pushing cylinder. An installation hole is provided on the outer pushing sleeve. An inner pushing seat is inserted into the installation hole. The upper end of the inner pushing seat is higher than the upper end of the outer pushing sleeve. An annular embedded groove is provided at the upper end of the outer pushing sleeve.

7. The pressing and flipping tooling for the filter seal ring assembling machine according to claim 6, wherein: A threaded sleeve is fixed below the inside of the installation hole. The threaded sleeve is connected with an adjusting bolt. The inner pushing seat is provided with a connection hole corresponding to the adjusting bolt. An adjusting relief hole is provided below the connection hole. The inner diameter of the adjusting relief hole is larger than the outer diameter of the threaded sleeve.

8. The pressing and flipping tooling for the filter seal ring assembling machine according to any one of claims 1 to 4, characterized in that: A feeding component is provided on the frame. The feeding component includes a feeding belt and a pulley drive mechanism for controlling the movement of the feeding belt. The end of the feeding belt is connected with an upper receiving plate. A lower receiving plate is provided below the upper receiving plate. The end of the lower receiving plate away from the upper receiving plate corresponds to the feeding groove. A pushing plate is provided between the upper receiving plate and the lower receiving plate. The pushing plate is linked with a pushing cylinder for driving the pushing plate to reciprocate towards the pressing seat. A strip-shaped relief groove is provided at the end of the upper receiving plate away from the feeding belt. The pushing plate is provided with a guiding hole corresponding to the strip-shaped relief groove. A pulling rod is arranged in the guiding hole. The pulling rod is linked with a pulling cylinder for driving the pulling rod to reciprocate axially along the guiding hole. The body of the pulling cylinder is linked with the pushing plate.

9. The pressing and flipping tooling for the filter seal ring assembling machine according to claim 8, wherein: Two damping buffers are installed below the lower receiving plate. The two damping buffers are symmetrically distributed on both sides of the pushing plate. The pushing plate is linked with a limiting buffer plate.

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