Guardrail deflection locking device

Abstract

The guardrail deflection locking device is characterized in that a guardrail is installed on a deflection fixing frame through a deflection connecting rod mechanism, the deflection fixing frame is fixedly installed on a bed frame of a medical bed, the deflection connecting rod mechanism comprises an outer connecting rod and an inner connecting rod, and the two ends of the outer connecting rod and the two ends of the inner connecting rod are hinged to the guardrail and the deflection fixing frame respectively; a damping power assisting device for reducing the deflection speed or fixing the deflection position is further arranged between the outer connecting rod or the inner connecting rod and the deflection fixing frame, a mounting seat is arranged on the inner connecting rod, a locking sliding seat is slidably mounted on the mounting seat, a locking handle is arranged on the locking sliding seat, a locking shaft extends out of the locking sliding seat, and the guardrail is in a locking state. The locking shaft penetrates through the mounting seat and extends into a locking hole in the deflection fixing frame, a guide structure for guiding the locking shaft to extend into the locking hole is arranged on the deflection fixing frame, and a fixing structure for keeping the locking shaft in an extending state is arranged on the mounting seat; the locking device can rapidly descend and automatically lock the guardrail, the locking efficiency is improved, and a patient is protected.

Description

Technical Field

[0001] The invention relates to the field of medical care bed production, and in particular to a guardrail deflection locking device. Background Art

[0002] At present, medical devices are developing rapidly, among which the demands of medical bed users for medical beds are not only reflected in the functions, practicality and ease of operation, but also in the appearance of the medical beds.

[0003] Today's medical beds must be equipped with guardrails to better protect patients. Today's medical beds are equipped with guardrails on both sides of the bed frame, and the guardrails are locked to the bed frame through a locking structure. Under the premise of protecting patients, the guardrails need to be easy to disassemble and assemble to facilitate the movement of patients. Patent No. 202223281090.5 discloses a guardrail assembly for a medical bed, which pulls the locking switch to make the buckle snap into the locking shaft, and then the guardrail can be swung down through the guardrail swing linkage mechanism. When the guardrail is swung up, it is necessary to manually hold the locking switch so that the bayonet locks upward and higher than the locking shaft to effectively lock it. In this way, it cannot be automatically locked directly when it needs to be closed during use, which is not convenient enough. Summary of the invention

[0004] The technical problem to be solved by the present invention is: a guardrail deflection locking device, which can quickly lower and automatically lock the guardrail, improve the locking efficiency, and protect patients.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a guardrail yaw locking device, comprising a guardrail, the guardrail is installed on a yaw fixing frame through a yaw link mechanism, the yaw fixing frame is fixedly installed on the bed frame of the medical bed, the yaw link mechanism comprises an outer link and an inner link, the two ends of the outer link and the inner link are respectively hinged on the guardrail and the yaw fixing frame, the hinge points of the outer link and the inner link on the guardrail and the hinge points on the yaw fixing frame are all on the same vertical line, the outer link or the inner link and the yaw fixing frame are connected to each other. A damping assist device for slowing down the yaw speed or fixing the yaw position is also provided between the frames. A mounting seat is provided on the inner connecting rod, and a locking slide is slidably mounted on the mounting seat. A locking handle for convenient manual pulling is provided on the locking slide. A locking shaft extends from the locking slide. The guardrail is in a locked state, and the locking shaft passes through the mounting seat and extends into a locking hole on the yaw fixing frame. A guide structure for guiding the locking shaft into the locking hole is provided on the yaw fixing frame, and a fixing structure for keeping the locking shaft in an extended state is provided on the mounting seat.

[0006] As a preferred solution, the locking handle is fixedly mounted on the locking slide by screws, the mounting seat is provided with a corresponding sliding through hole, the mounting seat is provided with a guide hole formed after the locking shaft passes through, and a sliding sleeve that cooperates with the locking shaft is embedded in the guide hole.

[0007] As a preferred solution, a fixed sleeve is fixedly installed on the locking slide, and a mounting groove is provided on the locking slide in the downstream direction of the fixed sleeve. A limit nut is embedded and installed in the mounting groove. The limit nut is supported by a bottom column through which a locking shaft passes at the bottom of the locking slide. The locking shaft passes through the locking slide and extends into the mounting groove to be threadedly connected to the limit nut. The upstream end of the locking shaft extends into the fixed sleeve.

[0008] As a preferred solution, a fixed through slot for inserting a fixed sleeve is provided upstream of the locking slide, a retaining edge is provided downstream of the fixed through slot, and a baffle is provided on the locking slide that is detachably embedded in the fixed through slot and limits the upstream of the fixed sleeve.

[0009] As a preferred solution, the fixing sleeve is provided with an accommodating hole for accommodating the locking shaft to extend to a certain depth.

[0010] As a preferred solution, the guide structure includes a guide inclined surface on the yaw fixing frame, and the locking hole is arranged on the guide inclined surface.

[0011] As a preferred solution, the yaw fixing frame is also provided with a stopper to prevent the yaw transition from abutting against the inner connecting rod, the locking shaft is inserted into the locking hole, and the axial direction of the locking shaft is perpendicular to the inclination direction of the guiding inclined surface.

[0012] As a preferred solution, the fixing structure includes a compression spring located in a sliding sleeve, a retaining ring is provided upstream of the guide hole of the mounting seat, the sliding sleeve is in contact with the retaining ring, one end of the compression spring abuts against the retaining ring, and the other end of the compression spring abuts against the locking shaft.

[0013] As a preferred solution, the damping assist device includes a gas spring hydraulic rod, one end of which is hinged to an inner connecting rod, and the other end is hinged to a sway fixing frame; the hinge points of the outer connecting rod at the guardrail and the sway fixing frame are higher than the hinge points of the inner connecting rod at the guardrail and the sway fixing frame.

[0014] As a preferred solution, a plurality of notches are evenly formed on the mounting seat on the inner circumference of the guide hole.

[0015] After adopting the above technical scheme, the effect of the present invention is as follows: since the guardrail sway locking device includes a guardrail, the guardrail is installed on the sway fixing frame through a sway link mechanism, and the sway fixing frame is fixedly installed on the bed frame of the medical bed, the sway link mechanism includes an outer connecting rod and an inner connecting rod, and the two ends of the outer connecting rod and the inner connecting rod are respectively hinged on the guardrail and the sway fixing frame, and the hinge points of the outer connecting rod and the inner connecting rod on the guardrail and the hinge points on the sway fixing frame are all on the same vertical straight line, and a damping assist device for slowing down the sway speed or fixing the sway position is also provided between the outer connecting rod or the inner connecting rod and the sway fixing frame, a mounting seat is provided on the inner connecting rod, and a locking slide is slidably installed on the mounting seat, and a locking handle is provided on the locking slide for convenient manual pulling, and a locking shaft extends from the locking slide, and the guardrail is in a locked state. The locking shaft passes through the mounting seat and extends into the locking hole on the sway fixing frame, and the sway fixing frame is provided with a guiding structure for guiding the locking shaft to extend into the locking hole, and the mounting seat is provided with a fixing structure for keeping the locking shaft in an extended state; first, the locking handle is manually pulled to retract the locking shaft and disengage the locking shaft from the locking hole, the guardrail will drop due to gravity, and the damping assist device will make the guardrail drop at a uniform speed, while manual assistance will be provided to complete the opening of the guardrail. When locking is required, only the guardrail needs to be lifted manually, and the locking shaft is kept in an extended state by the fixed structure. Therefore, after the outer connecting rod and the inner connecting rod sway, the locking shaft always supports the sway fixing frame, and when the locking hole coincides with the locking shaft, the locking shaft pops out to complete the locking without manual pulling of the locking handle; the locking device can quickly lower and automatically lock the guardrail, thereby improving the locking efficiency and protecting the patient.

[0016] Furthermore, since the locking handle is fixedly mounted on the locking slide by screws, a corresponding sliding through hole is provided on the mounting seat, and a guide hole is provided on the mounting seat after the locking shaft passes through, and a sliding sleeve that cooperates with the locking shaft is embedded and installed in the guide hole; the locking slide and the locking handle can slide between the sliding through holes, the guide hole can limit the sliding direction of the locking shaft, and can provide radial support at the same time, and the sliding sleeve ensures accurate and stable sliding.

[0017] Since a fixed sleeve is fixedly installed on the locking slide, a mounting groove is provided on the locking slide in the downstream direction of the fixed sleeve, and a limit nut is embedded and installed in the mounting groove. The limit nut is supported by a bottom column through which a locking shaft at the bottom of the locking slide passes, and the locking shaft passes through the locking slide and extends into the mounting groove and is threadedly connected to the limit nut, and the upstream end of the locking shaft extends into the fixed sleeve; the locking shaft can be threadedly connected to the limit nut by passing through the mounting seat and the bottom column in turn, so as to limit the radial position and will not disengage during axial sliding. Then the upstream end of the locking shaft can be radially fixed by the fixed sleeve, which can greatly improve the radial bearing capacity of the locking shaft, thereby extending into the locking hole for reliable support.

[0018] Furthermore, since a fixed through slot for inserting a fixed sleeve is provided upstream of the locking slide, a retaining edge is provided downstream of the fixed through slot, and a baffle which can be detachably embedded in the fixed through slot and restrict the upstream of the fixed sleeve is provided on the locking slide, installation and disassembly are quick and convenient, and the use effect of the locking shaft is improved at the same time.

[0019] Furthermore, since the fixed sleeve is provided with an accommodating hole for accommodating the locking shaft to extend into a certain depth, this can ensure that the locking slide can drive the locking shaft to retract from the locking hole. At the same time, the locking slide and the locking shaft are not fixedly connected, and the locking shaft can slide in the fixed sleeve, thereby increasing flexibility and improving the use effect.

[0020] Furthermore, since the guiding structure includes a guiding inclined surface on the sway fixing frame, and the locking hole is arranged on the guiding inclined surface, the inclined surface has a guiding effect on the locking shaft. When the outer connecting rod and the inner connecting rod are swayed, the guiding inclined surface can automatically squeeze the locking shaft until it corresponds to the locking hole and then extends out, thereby improving the use effect.

[0021] Since the yaw fixing frame is also provided with a stopper to prevent the yaw transition and to resist the inner connecting rod, the locking shaft is inserted into the locking hole, and the axial direction of the locking shaft is perpendicular to the inclination direction of the guide slope; the stopper can prevent the guardrail from continuing to rise when the locking shaft is not accurately inserted into the locking hole, thereby improving safety during use, and the locking shaft extends into the locking hole to ensure uniform force.

[0022] Since the fixed structure includes a compression spring located in the sliding sleeve, a retaining ring is provided upstream of the guide hole of the mounting seat, the sliding sleeve is in contact with the retaining ring, one end of the compression spring is against the retaining ring, and the other end of the compression spring is against the locking shaft; the compression spring can always have an outward force on the locking shaft, so that the locking shaft extends, and when the locking handle is manually pulled and the compression spring is compressed, the locking rod will retract, and when the compression spring is released and reset, the locking rod will naturally extend, which is simple and reliable to use, and when the locking rod is squeezed by the guide inclined surface, the locking handle will not slide, and the upstream end of the locking rod extends into the fixed sleeve to complete the retraction, further improving the use effect.

[0023] Furthermore, since the damping assist device includes a gas spring hydraulic rod, one end of the gas spring hydraulic rod is hinged on the inner connecting rod, and the other end is hinged on the sway fixing frame; the hinge point of the outer connecting rod located at the guardrail and the sway fixing frame is higher than the hinge point of the inner connecting rod located at the guardrail and the sway fixing frame; this can greatly slow down the speed of the guardrail when it falls due to sway, and can also enable the guardrail to be in any position of the sway during sway, thereby improving the flexibility of the guardrail; at the same time, the guardrail can be lifted and lowered stably and reliably.

[0024] Furthermore, since the mounting seat is evenly provided with a plurality of notches on the inner circumference of the guide hole, the contact area with the inner wall of the guide hole of the mounting seat can be reduced when the sliding sleeve is inserted, so that the sliding sleeve can be inserted conveniently and tightened firmly at the same time, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 is a stereogram of an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of an embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the sliding locking slide and the mounting seat in an embodiment of the present invention;

[0029] Figure 4 is a cross-sectional view of a locking slide and a deflection fixing frame according to an embodiment of the present invention;

[0030] Figure 5 yes Figure 3 A partial enlarged view of point A;

[0031] In the attached drawings: 1. guardrail; 2. sway fixing frame; 3. outer connecting rod; 4. inner connecting rod; 5. mounting seat; 6. locking slide seat; 7. locking handle; 8. locking shaft; 9. locking hole; 10. screw; 11. sliding through hole; 12. guide hole; 13. sliding bushing; 14. fixing sleeve; 15. mounting groove; 16. limiting nut; 17. bottom column; 18. fixing through groove; 19. retaining edge; 20. baffle; 21. receiving hole; 22. guiding inclined surface; 23. block; 24. compression spring; 25. retaining ring; 26. gas spring hydraulic rod; 27. notch. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below through specific examples.

[0033] like Figures 1 to 5As shown, a guardrail sway locking device comprises a guardrail 1, wherein the guardrail 1 is mounted on a sway fixing frame 2 through a sway link mechanism, wherein the sway fixing frame 2 is fixedly mounted on a bed frame of a medical bed, wherein the sway link mechanism comprises an outer connecting rod 3 and an inner connecting rod 4, wherein the two ends of the outer connecting rod 3 and the inner connecting rod 4 are respectively hinged on the guardrail 1 and the sway fixing frame 2, wherein the hinge points of the outer connecting rod 3 and the inner connecting rod 4 on the guardrail 1 and the hinge points on the sway fixing frame 2 are both on the same vertical line, and a sway reduction device is also provided between the outer connecting rod 3 or the inner connecting rod 4 and the sway fixing frame 2. A damping assist device for swinging speed or fixing the yaw position, the inner connecting rod 4 is provided with a mounting seat 5, the mounting seat 5 is provided with a locking slide 6 slidably mounted, the locking slide 6 is provided with a locking handle 7 for convenient manual pulling, a locking shaft 8 extends from the locking slide 6, the guardrail 1 is in a locked state, the locking shaft 8 penetrates the mounting seat 5 and extends into a locking hole 9 on the yaw fixed frame 2, the yaw fixed frame 2 is provided with a guiding structure for guiding the locking shaft 8 to extend into the locking hole 9, and the mounting seat 5 is provided with a fixing structure to keep the locking shaft 8 in an extended state.

[0034] The outer connecting rods 3 are two hinged connecting rods, the inner connecting rod 4 is located between the outer connecting rods 3 and is a plate-like structure, and the mounting seat 5 is arranged at the downstream position of the inner connecting rod 4, effectively forming a parallel four-bar linkage.

[0035] In this embodiment, the locking handle 7 is fixedly mounted on the locking slide 6 by a screw 10, and the mounting seat 5 is provided with a corresponding sliding through hole 11, and the mounting seat 5 is provided with a guide hole 12 formed after the locking shaft 8 passes through, and a sliding sleeve 13 that cooperates with the locking shaft 8 is embedded and installed in the guide hole 12; the locking slide 6 and the locking handle 7 are clamped on the mounting seat 5 through the sliding through hole 11, so that they can be accurately guided by the sliding through hole 11, the guide hole 12 can limit the sliding direction of the locking shaft 8, and can provide radial support at the same time, and the sliding sleeve 13 ensures accurate and stable sliding.

[0036] like Figure 3 and Figure 4 As shown, a fixing sleeve 14 is fixedly installed on the locking slide 6, and a mounting groove 15 is provided on the locking slide 6 in the downstream direction of the fixing sleeve 14. A limiting nut 16 is embedded and installed in the mounting groove 15, and the limiting nut 16 is supported by a bottom column 17 through which the locking shaft 8 at the bottom of the locking slide 6 passes. The locking shaft 8 passes through the locking slide 6 and extends into the mounting groove 15 to be threadedly connected with the limiting nut 16, and the upstream end of the locking shaft 8 extends into the fixing sleeve 14; the locking shaft 8 can be threadedly connected with the limiting nut 16 by passing through the mounting seat 5 and the bottom column 17 in turn, so as to limit radially, and will not disengage during axial sliding, and then the upstream end of the locking shaft 8 can be radially fixed by the fixing sleeve 14, which can greatly improve the radial bearing capacity of the locking shaft 8, thereby extending into the locking hole 9 for reliable support.

[0037] Furthermore, a fixed through groove 18 for inserting the fixed sleeve 14 is provided upstream of the locking slide 6, and a retaining edge 19 is provided downstream of the fixed through groove 18. A baffle 20 is provided on the locking slide 6 which is detachably embedded in the fixed through groove 18 and limits the upstream of the fixed sleeve 14. When installing, the fixed sleeve 14 is directly inserted into the fixed through groove 18 and the lower end is blocked by the retaining edge 19, and the upper end is blocked by the baffle 20, so that the fixed sleeve 14 is restricted, otherwise it can be removed. The installation and disassembly are quick and convenient, and the use effect of the locking shaft 8 is improved at the same time.

[0038] In this embodiment, the fixed sleeve 14 is provided with an accommodating hole 21 for accommodating the locking shaft 8 to extend into a certain depth; this can ensure that the locking slide 6 can drive the locking shaft 8 to retract from the locking hole 9. At the same time, the locking slide 6 and the locking shaft 8 are not fixedly connected, and the locking shaft 8 can slide in the fixed sleeve 14, thereby increasing flexibility and improving the use effect.

[0039] like Figure 4 As shown, the guiding structure includes a guiding inclined surface 22 on the sway fixing frame 2, and the locking hole 9 is arranged on the guiding inclined surface 22; the inclined surface has a guiding effect on the locking shaft 8, and when the outer connecting rod 3 and the inner connecting rod 4 are swayed, the guiding inclined surface 22 can automatically squeeze the locking shaft 8 until it corresponds to the locking hole 9 and then extends out, thereby improving the use effect.

[0040] like Figure 2 As shown, the sway fixing frame 2 is also provided with a stopper 23 for preventing the sway transition from resisting the inner connecting rod 4, and the locking shaft 8 is inserted into the locking hole 9, and the axial direction of the locking shaft 8 is perpendicular to the inclination direction of the guide slope 22; the stopper 23 can prevent the guardrail 1 from continuing to rise when the locking shaft 8 is not accurately inserted into the locking hole 9, thereby improving the safety during use, and the locking shaft 8 extends into the locking hole 9 to ensure uniform force.

[0041] Furthermore, the fixing structure includes a compression spring 24 located in the sliding sleeve 13, and a retaining ring 25 is provided upstream of the guide hole 12 of the mounting seat 5. The sliding sleeve 13 contacts the retaining ring 25, one end of the compression spring 24 abuts against the retaining ring 25, and the other end of the compression spring 24 abuts against the locking shaft 8; the compression spring 24 can always have an outward force on the locking shaft 8, so that the locking shaft 8 extends, and when the locking handle 7 is manually pulled and the compression spring 24 is compressed, the locking rod will retract, and when the compression spring 24 is released and reset, the locking rod will naturally extend, which is simple and reliable to use, and when the locking rod is squeezed by the guide bevel 22, the locking handle 7 will not slide, and the upstream end of the locking rod extends into the fixed sleeve 14 to complete the retraction, further improving the use effect.

[0042] like Figure 2As shown, the damping assist device includes a gas spring hydraulic rod 26, one end of which is hinged to the inner connecting rod 4, and the other end is hinged to the sway fixing frame 2; the hinge points of the outer connecting rod 3 located at the guardrail 1 and the sway fixing frame 2 are higher than the hinge points of the inner connecting rod 4 located at the guardrail 1 and the sway fixing frame 2; this can greatly slow down the speed of the guardrail 1 when it falls in a sway, and can also enable the guardrail 1 to be in any position of the sway when it sways, thereby improving the flexibility of the guardrail 1, while ensuring that the parallel four-bar linkage formed by the outer connecting rod 3 and the inner connecting rod 4 makes the lifting and lowering of the guardrail 1 stable and reliable.

[0043] like Figure 5 As shown, the mounting seat 5 is evenly provided with a plurality of notches 27 on the inner circumference of the guide hole 12; when the sliding sleeve 13 is inserted, the contact area with the inner wall of the guide hole 12 of the mounting seat 5 can be reduced, so that the sliding sleeve 13 can be inserted conveniently while being tightened firmly, thereby improving the use effect.

[0044] The working principle of this embodiment is as follows: first, by manually pulling the locking handle 7, the locking slide 6 slides, the locking shaft 8 retracts, and the locking shaft 8 is disengaged from the locking hole 9. The guardrail 1 will drop due to gravity, and the gas spring hydraulic rod 26 will make the guardrail 1 drop at a uniform speed. At the same time, manual assistance will be provided to complete the opening of the guardrail 1. When locking is required, only the guardrail 1 needs to be manually lifted, and the locking shaft 8 is supported by the compression spring 24 to maintain the extended state. When the outer connecting rod 3 and the inner connecting rod 4 are deflected, the locking shaft 8 is always supported by the guide slope 22 of the deflection fixing frame 2. When the locking hole 9 coincides with the locking shaft 8, the locking shaft 8 pops out to complete the locking.

[0045] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A guardrail sway locking device, comprising a guardrail, wherein the guardrail is mounted on a sway fixing frame through a sway link mechanism, wherein the sway fixing frame is fixedly mounted on a bed frame of a medical bed, wherein the sway link mechanism comprises an outer connecting rod and an inner connecting rod, wherein both ends of the outer connecting rod and the inner connecting rod are respectively hinged on the guardrail and the sway fixing frame, wherein: The hinge points of the outer connecting rod and the inner connecting rod on the guardrail and the hinge points on the sway fixing frame are all on the same vertical straight line. A damping assist device for slowing down the sway speed or fixing the sway position is also provided between the outer connecting rod or the inner connecting rod and the sway fixing frame. A mounting seat is provided on the inner connecting rod, and a locking slide is slidably installed on the mounting seat. A locking handle for convenient manual pulling is provided on the locking slide. A locking shaft extends from the locking slide. The guardrail is in a locked state, and the locking shaft passes through the mounting seat and extends into the locking hole on the sway fixing frame. A guide structure for guiding the locking shaft into the locking hole is provided on the sway fixing frame, and a fixing structure for keeping the locking shaft in an extended state is provided on the mounting seat.

2. A guardrail sway locking device as claimed in claim 1, characterized in that: The locking handle is fixedly mounted on the locking slide seat by screws, the mounting seat is provided with a corresponding sliding through hole, the mounting seat is provided with a guide hole formed after the locking shaft passes through, and a sliding sleeve matching the locking shaft is embedded and installed in the guide hole.

3. A guardrail sway locking device as claimed in claim 2, characterized in that: A fixed sleeve is fixedly installed on the locking slide, and a mounting groove is provided on the locking slide in the downstream direction of the fixed sleeve. A limit nut is embedded and installed in the mounting groove. The limit nut is supported by a bottom column through which a locking shaft passes at the bottom of the locking slide. The locking shaft passes through the locking slide and extends into the mounting groove to be threadedly connected to the limit nut. The upstream end of the locking shaft extends into the fixed sleeve.

4. A guardrail sway locking device as claimed in claim 3, characterized in that: A fixed through slot for inserting a fixed sleeve is provided upstream of the locking slide, a retaining edge is provided downstream of the fixed through slot, and a baffle which can be detachably embedded in the fixed through slot and limit the upstream of the fixed sleeve is provided on the locking slide.

5. A guardrail sway locking device as claimed in claim 4, characterized in that: The fixing sleeve is provided with an accommodating hole for accommodating the locking shaft to extend into a certain depth.

6. A guardrail sway locking device as claimed in claim 5, characterized in that: The guiding structure comprises a guiding inclined surface on the yaw fixing frame, and the locking hole is arranged on the guiding inclined surface.

7. A guardrail sway locking device as claimed in claim 6, characterized in that: The deflection fixing frame is also provided with a stopper to prevent the deflection transition from abutting against the inner connecting rod. The locking shaft is inserted into the locking hole, and the axial direction of the locking shaft is perpendicular to the inclination direction of the guiding inclined surface.

8. A guardrail sway locking device as claimed in claim 7, characterized in that: The fixing structure includes a compression spring located in the sliding sleeve, a retaining ring is provided upstream of the guide hole of the mounting seat, the sliding sleeve contacts the retaining ring, one end of the compression spring abuts against the retaining ring, and the other end of the compression spring abuts against the locking shaft.

9. A guardrail sway locking device as claimed in claim 8, characterized in that: The damping assist device comprises a gas spring hydraulic rod, one end of which is hinged on an inner connecting rod and the other end is hinged on a sway fixing frame; the hinge points of the outer connecting rod located at the guardrail and the sway fixing frame are both higher than the hinge points of the inner connecting rod located at the guardrail and the sway fixing frame.

10. A guardrail sway locking device as claimed in claim 9, characterized in that: The mounting seat is evenly provided with a plurality of notches on the inner circumference of the guide hole.

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