Gas spring

Abstract

The invention relates to the technical field of gas spring load protection, in particular to a gas spring which comprises a barrel, a piston and a locking assembly, the piston is provided with a first flow channel, and the barrel is provided with a containing cavity. The piston is located in the containing cavity and can move in the first direction, and the piston divides the containing cavity into a first liquid cavity and a second liquid cavity in the first direction. The piston and the side wall of the containing cavity define a second flow channel, the first liquid cavity, the first flow channel, the second flow channel and the second liquid cavity are sequentially communicated, and the second flow channel is further communicated with the first liquid cavity and the second liquid cavity. And the locking assembly is located in the second flow channel, and the locking assembly is configured to be capable of sealing the second flow channel and relatively sealing the first flow channel and the second flow channel when the moving speed in the first direction is larger than a preset value. The supporting function of the gas spring can be maintained.

Description

Technical Field

[0001] The present application relates to the technical field of gas spring load protection, and in particular to a gas spring. Background Art

[0002] A gas spring is a component that supports heavy objects. It plays a supporting role by being connected to the heavy objects.

[0003] A gas spring generally consists of a piston rod and a cylinder, which is filled with gas or liquid. The piston rod is in direct contact with the weight and applies the force of the weight to the fillers, causing the piston rod to move. The liquid in the cylinder is affected by the force and flows in the cylinder, which can slow down the falling speed of the weight and play a supporting role.

[0004] In the related art, when the gas spring fails or the weight of the heavy object suddenly increases significantly, the supporting function of the gas spring will be significantly reduced, causing the heavy object to fall and cause harm to the human body. Summary of the invention

[0005] In view of this, the present application provides a gas spring to maintain its supporting function.

[0006] Specifically, the following technical solutions are included:

[0007] The present application provides a gas spring, which includes a cylinder, a piston and a locking assembly, wherein the piston has a first flow channel, wherein:

[0008] The cylinder has a containing cavity.

[0009] The piston is located in the accommodating chamber and is movable along a first direction. The piston divides the accommodating chamber into a first liquid chamber and a second liquid chamber along the first direction.

[0010] The piston and the side wall of the accommodating chamber form a second flow channel, the first liquid chamber, the first flow channel, the second flow channel and the second liquid chamber are connected in sequence, and the second flow channel also connects the first liquid chamber and the second liquid chamber.

[0011] The locking assembly is located in the second flow channel, and is configured to seal the second flow channel and relatively seal the first flow channel and the second flow channel when the moving speed of the locking assembly along the first direction is greater than a preset value.

[0012] Optionally, the locking assembly includes a locking sleeve, a first sealing ring, a first spring and a second sealing ring, the locking sleeve is sleeved on the outer wall of the piston, the first sealing ring is sleeved between the locking sleeve and the piston, the locking sleeve can move relative to the piston along the first direction to cooperate with the first sealing ring to relatively seal the first flow channel and the second flow channel, the locking sleeve, the first spring and the second sealing ring are located in the second flow channel, the first spring and the second sealing ring are respectively located at two ends of the locking sleeve along the first direction, the first spring extends spirally along the first direction and connects the locking sleeve and the piston.

[0013] Optionally, the inner side of the locking sleeve has a first annular groove, the first sealing ring is located in the first annular groove, the first flow channel has a first connecting hole, the end of the first connecting hole extends to the outer wall of the piston and is connected to the second flow channel, and the end of the first connecting hole and the first sealing ring are arranged in sequence along the first direction.

[0014] Optionally, the locking assembly includes a support, one end of the first spring is connected to the locking sleeve, and the support connects the other end of the first spring and the piston.

[0015] Optionally, the piston has a limiting portion, the limiting portion is located at one end where the second flow channel is connected to the first liquid chamber, and the second sealing ring is located between the limiting portion and the locking sleeve.

[0016] Optionally, the gas spring includes a rod body, which is connected to the piston and extends from the second liquid chamber to the cylinder body.

[0017] Optionally, the first flow channel penetrates the piston along the first direction, and the rod body seals an end of the first flow channel close to the second liquid chamber.

[0018] Optionally, the piston has a convex portion, the locking sleeve has a first groove, and the locking sleeve can move along the first direction so that the first groove and the convex portion are matched and separated.

[0019] Optionally, the outer side of the piston has a second annular groove, the first sealing ring is located in the second annular groove, the inner wall of the locking sleeve abuts against the first sealing ring, the first flow channel has a first connecting hole, the end of the first connecting hole extends to the outer wall of the piston and is connected to the second flow channel, the end of the first connecting hole and the second annular groove are arranged in sequence along the first direction, and the second annular groove is closer to the second liquid chamber than the first connecting hole.

[0020] Optionally, the locking sleeve has a first through hole, which penetrates the locking sleeve along the second direction, is located between the first sealing ring and the second sealing ring, an end of the first connecting hole is located between the first sealing ring and the second sealing ring, and the second direction intersects with the first direction.

[0021] Optionally, the inner wall of the locking sleeve has a second groove, and a portion of the first sealing ring is located in the second groove.

[0022] Optionally, the gas spring includes a rod body, the piston includes a main body, a first baffle and a second baffle, the first flow channel passes through the main body along the first direction, the first baffle and the second baffle are respectively located at two ends of the first flow channel, the rod body is passed through the first flow channel, and is respectively connected to the first baffle and the second baffle, and the second flow channel is surrounded by the side wall of the accommodating cavity, the first baffle, the main body and the second baffle.

[0023] Optionally, the piston has a recessed groove, and the recessed groove is connected to the first communicating hole and the second annular groove.

[0024] Optionally, the piston includes a valve core, which is located in the first flow channel. The valve core is configured to open when the force acting along the first direction toward the second liquid chamber is greater than a set value to connect the first liquid chamber and the first flow channel.

[0025] Optionally, the valve core includes a core shaft, a sealing portion and a reset member, the core shaft and the sealing portion are located in the first flow channel, and cooperate with the sealing portion to seal the end of the first flow channel connected to the first liquid chamber, the core shaft can move along the first direction relative to the sealing portion to move under the action force, so that the end of the first flow channel connected to the first liquid chamber is connected to the first liquid chamber, and the reset member is used to provide a reset force to the core shaft when the core shaft moves relative to the sealing portion, the first flow channel has a second communicating hole, the end of the second communicating hole extends to the second flow channel, and the end of the second communicating hole is located at one end of the locking sleeve close to the first liquid chamber.

[0026] Optionally, the core shaft includes a first section and a second section, the first section is connected to the second section, a radial cross-sectional area of ​​the first section is larger than a radial cross-sectional area of ​​the second section, and the second section is closer to the first liquid chamber than the first section.

[0027] The beneficial effects of the technical solution provided by the embodiment of the present application include at least: the piston divides the accommodating chamber into the first liquid chamber and the second liquid chamber, which is conducive to the fluid in the accommodating chamber being subjected to the force from the heavy object and flowing between the first liquid chamber and the second liquid chamber through the first flow channel and the second flow channel, and forming a reaction force on the heavy object to achieve the support function. The locking assembly seals the second flow channel and relatively seals the first flow channel and the second flow channel, so that when the gas spring of the present application fails or the weight of the heavy object increases significantly, the speed of the fluid flowing between the first liquid chamber and the second liquid chamber can be further delayed, and the first liquid chamber and the second liquid chamber can be relatively sealed, so as to maintain the support function of the gas spring and prevent the heavy object supported by the gas spring from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the structural decomposition of a gas spring provided in an embodiment of the present application;

[0030] Figure 2 A schematic front view of a gas spring provided in an embodiment of the present application;

[0031] Figure 3 for Figure 2 A schematic diagram of the full section at AA in the middle;

[0032] Figure 4 for Figure 3 A detailed schematic diagram of the first working state of the first embodiment at B;

[0033] Figure 5 for Figure 3 A detailed schematic diagram of the second working state of the first embodiment at B;

[0034] Figure 6 for Figure 3 A detailed schematic diagram of the first working state of the second embodiment at B;

[0035] Figure 7 for Figure 3 A detailed schematic diagram of a second working state of the second embodiment at B;

[0036] Figure 8 for Figure 3 A detailed schematic diagram of the first working state of the third embodiment at B;

[0037] Fig. 9 for Figure 3 A detailed schematic diagram of the second working state of the third embodiment at B;

[0038] Fig.10 for Figure 3 A detailed schematic diagram of the first working state of the fourth embodiment at B;

[0039] Fig.11 for Figure 3 A detailed schematic diagram of the second working state of the fourth embodiment at B;

[0040] Fig.12 for Figure 3 A detailed schematic diagram of the fifth embodiment at B in the figure.

[0041] The reference numerals in the figures represent respectively:

[0042] 1. Cylinder; 101. Accommodating chamber; 1011. First liquid chamber; 1012. Second liquid chamber;

[0043] 2. piston; 201. first flow channel; 2011. first communication hole; 2012. second communication hole; 202. second flow channel; 203. second annular groove; 204. sink groove; 21. valve core; 211. core shaft; 2111. first section; 2112. second section; 212. sealing part; 213. reset member; 22. main body; 23. first baffle plate; 24. second baffle plate; 2401. second through hole; 25. limiter; 26. convex part;

[0044] 3. Locking assembly; 31. Lock sleeve; 3101. First ring groove; 3102. First groove; 3103. First through hole; 3104. Second groove; 32. First sealing ring; 33. First spring; 34. Second sealing ring; 35. Support;

[0045] 4. Rod body.

[0046] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally represented by Figure 1 The relative relationship of the orientation shown in the figure is used as the basis, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, "up" and "down" may be interchangeable.

[0049] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0050] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0051] The present application provides a gas spring, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the gas spring includes a cylinder 1, a piston 2 and a locking assembly 3, wherein the piston 2 has a first flow channel 201, wherein

[0052] The cylinder 1 has a receiving chamber 101 .

[0053] The piston 2 is located in the accommodating chamber 101 and is movable along a first direction. The piston 2 divides the accommodating chamber 101 into a first liquid chamber 1011 and a second liquid chamber 1012 along the first direction.

[0054] The piston 2 and the side wall of the accommodating chamber 101 form a second flow channel 202 . The first liquid chamber 1011 , the first flow channel 201 , the second flow channel 202 and the second liquid chamber 1012 are connected in sequence. The second flow channel 202 also connects the first liquid chamber 1011 and the second liquid chamber 1012 .

[0055] The locking assembly 3 is located in the second flow channel 202 , and is configured to seal the second flow channel 202 and relatively seal the first flow channel 201 and the second flow channel 202 when the moving speed of the locking assembly 3 along the first direction is greater than a preset value.

[0056] It is understandable that the piston 2 divides the accommodating chamber 101 into the first liquid chamber 1011 and the second liquid chamber 1012, which is conducive to the liquid in the accommodating chamber 101 to flow between the first liquid chamber 1011 and the second liquid chamber 1012 through the first flow channel 201 and the second flow channel 202 under the force from the heavy object, and forms a reaction force on the heavy object to achieve the support function. The locking component 3 seals the second flow channel 202 and relatively seals the first flow channel 201 and the second flow channel 202, so that when the gas spring of the present application fails or the weight of the heavy object increases significantly, the speed of the liquid flowing between the first liquid chamber 1011 and the second liquid chamber 1012 can be further delayed, and the first liquid chamber 1011 and the second liquid chamber 1012 can be relatively sealed, so as to maintain the support function of the gas spring and prevent the heavy object supported by the gas spring from falling.

[0057] In the embodiment of the present application, the cylinder 1 is a hollow structure, and the hollow part forms a receiving chamber 101. The receiving chamber 101 can be filled with liquid such as lubricating oil, or can also be filled with gas such as nitrogen.

[0058] In the embodiment of the present application, the piston 2 is located in the accommodating chamber 101 and can be moved along the first direction by the force of the filler from the accommodating chamber 101, thereby changing the volume of the first liquid chamber 1011 and the second liquid chamber 1012, and allowing the liquid in the accommodating chamber 101 to flow to the side with a larger volume until the liquid capacity of the two reaches a balanced state.

[0059] In the embodiment of the present application, taking the gravity direction of the weight as the first direction toward the first liquid chamber 1011 as an example, when the piston 2 is subjected to the above-mentioned force, it moves toward the first liquid chamber 1011 along the first direction, the volume of the first liquid chamber 1011 decreases, and the liquid inside it enters the second liquid chamber 1012 through the first flow channel 201 and the second flow channel 202, and also enters the second liquid chamber 1012 through the second flow channel 202. When the liquid flows, due to the obstruction of the piston 2, a reaction force will be generated on the piston 2 and applied to the weight, thereby slowing down the speed of the weight falling. When subjected to a force opposite to the gravity direction of the weight, the piston 2 moves toward the second liquid chamber 1012 along the first direction, the volume of the second liquid chamber 1012 decreases, and the liquid inside it enters the first liquid chamber 1011 through the second flow channel 202 and the first flow channel 201, and also enters the first liquid chamber 1011 through the second flow channel 202.

[0060] In the embodiment of the present application, since the manifestation of the failure of the gas spring is mainly a significant increase in the falling speed of the heavy object, which causes harm to the user, and the falling speed of the heavy object can be considered to be consistent with the moving speed of the piston 2, the locking assembly 3 is configured to seal the second flow channel 202 when the moving speed along the first direction is greater than a preset value, and to relatively seal the first flow channel 201 and the second flow channel 202, so that the first liquid chamber 1011 and the second liquid chamber 1012 can be relatively sealed, which increases the reaction force of the liquid on the piston 2, thereby greatly slowing down the falling speed of the heavy object when the gas spring fails, thereby maintaining its supporting function. Taking the gravity direction of the weight as the first direction toward the first liquid chamber 1011 as an example, when the spring fails, the piston 2 is subjected to the above-mentioned force and moves toward the first liquid chamber 1011 along the first direction, and the volume of the first liquid chamber 1011 becomes smaller. Due to the sealing effect of the locking assembly 3, the first liquid chamber 1011 can be considered as a cavity with sufficient airtightness, that is, compared with the case where there is no failure, the liquid in the first liquid chamber 1011 has difficulty in entering the second liquid chamber 1012 through the first flow channel 201 and the second flow channel 202. The force of the weight becomes the pressure that causes the liquid in the first liquid chamber 1011 to be compressed, and the compressibility of the liquid is small. The reaction force generated when it is compressed will also be applied to the weight, which can stop the weight from falling. Among them, the locking assembly 3 can separate the first liquid chamber 1011 and the second liquid chamber 1012 into two closed cavities by sealing the first flow channel 201 and the second flow channel 202, so that the liquids in the two cannot circulate, and play a supporting role when the gas spring fails.

[0061] In the embodiment of the present application, the locking assembly 3 can seal the second flow channel 202 and relatively seal the first flow channel 201 and the second flow channel 202 when the moving speed along the first direction is greater than 0.1 m / s.

[0062] In some of the embodiments of this application, Figure 4 and Figure 5 As shown, the locking assembly 3 includes a lock sleeve 31, a first sealing ring 32, a first spring 33 and a second sealing ring 34. The lock sleeve 31 is sleeved on the outer wall of the piston 2. The first sealing ring 32 is sleeved between the lock sleeve 31 and the piston 2. The lock sleeve 31 can move relative to the piston 2 along the first direction to cooperate with the first sealing ring 32 to relatively seal the first flow channel 201 and the second flow channel 202. The lock sleeve 31, the first spring 33 and the second sealing ring 34 are located in the second flow channel 202. The first spring 33 and the second sealing ring 34 are respectively located at both ends of the lock sleeve 31 along the first direction. The first spring 33 spirally extends along the first direction and connects the lock sleeve 31 and the piston 2. Arrows in the figure indicate the flow direction of the liquid.

[0063] It can be understood that the lock sleeve 31 is located in the second flow channel 202, filling part of the gap between the piston 2 and the side wall of the accommodating chamber 101, and the second sealing ring 34 can be deformed when subjected to a force, so that the remaining gap between the piston 2 and the side wall of the accommodating chamber 101 in the position in contact with the lock sleeve 31 can be filled. Therefore, under the cooperation of the lock sleeve 31 and the second sealing ring 34, the second flow channel 202 is sealed, and the liquid in the first liquid chamber 1011 and the liquid in the second liquid chamber 1012 cannot directly flow through the second flow channel 202. The lock sleeve 31 cooperates with the first sealing ring 32 to relatively seal the first flow channel 201 and the second flow channel 202, which is conducive to preventing the liquid in the first flow channel 201 and the liquid in the second flow channel 202 from directly flowing with each other. This, in conjunction with the second sealing ring 34, is conducive to forming a relatively closed cavity between the first liquid chamber 1011 and the second liquid chamber 1012, thereby generating sufficient reaction force to support the heavy object when it fails.

[0064] At the same time, the elastic force exerted on the first spring 33 is related to the force exerted by the liquid on the lock sleeve 31. The greater the force exerted by the liquid on the lock sleeve 31, the faster the lock sleeve 31 moves, and the greater the elastic force generated by the first spring 33. Similarly, the force exerted by the liquid on the lock sleeve 31 is also related to the gravity exerted on the weight, that is, the greater the gravity of the weight, the faster the piston 2 moves. The liquid will produce resistance to the piston 2 and the lock sleeve 31 at the same time. These two resistances are positively correlated. Therefore, when the gravity exerted by the weight is too large, the movement speed of the piston 2 will exceed the preset value. At this time, the lock sleeve 31 can reach a specific position. At this time, the gravity of the weight still continues to exert an effect on the piston 2, and the first sealing ring 32 and the second sealing ring 34 can cooperate with the lock sleeve 31 to produce a sealing effect on the first flow channel 201 and the second flow channel 202. Before the weight is removed, the first liquid chamber 1011 and the second liquid chamber 1012 will form two relatively closed cavities, thereby maintaining the supporting function of the gas spring.

[0065] In the embodiment of the present application, the second sealing ring 34 may be a rectangular sealing ring or an O-shaped sealing ring.

[0066] In the embodiment of the present application, by adjusting the elasticity of the first spring 33, the locking sleeve 31 can seal the second flow channel 202 with the cooperation of the second sealing ring 34 when its moving speed along the first direction is greater than 0.1m / s, so that the liquid in the first liquid chamber 1011 and the liquid in the second liquid chamber 1012 cannot directly flow to each other through the second flow channel 202.

[0067] In some of the embodiments of this application, Figure 4 and Figure 5As shown, the inner side of the locking sleeve 31 has a first annular groove 3101, the first sealing ring 32 is located in the first annular groove 3101, the first flow channel 201 has a first connecting hole 2011, the end of the first connecting hole 2011 extends to the outer wall of the piston 2 and is connected to the second flow channel 202, and the end of the first connecting hole 2011 and the first sealing ring 32 are arranged in sequence along the first direction.

[0068] It is understandable that the first connecting hole 2011 can allow the liquid in the first flow channel 201 to enter the second flow channel 202, and can also allow the liquid in the second flow channel 202 to enter the first flow channel 201, so that the liquid can flow between the first flow channel 201 and the second flow channel 202, and even between the first liquid cavity 1011 and the second liquid cavity 1012. The end of the first connecting hole 2011 and the first sealing ring 32 are sequentially arranged along the first direction, so that the locking sleeve 31 can drive the first sealing ring 32 to move along the first direction, and form a seal on the end of the first connecting hole 2011, and cooperate with the second sealing ring 34. Before the heavy object is removed, the first liquid cavity 1011 and the second liquid cavity 1012 will form two relatively closed cavities, thereby maintaining the supporting function of the gas spring.

[0069] In the embodiment of the present application, the gravity direction of the weight is along the first direction toward the first liquid cavity 1011. When the gravity of the weight is small, the force of the liquid on the lock sleeve 31 is small and the moving speed is small, so it will not cover the first connecting hole 2011 to form a seal on the first connecting hole 2011, and the gas spring can work normally. In the case of the same weight, when a new weight is suddenly added, and the force of the liquid on the lock sleeve 31 and the resulting moving speed are greater than the preset value, the lock sleeve 31 will move to the end of the first connecting hole 2011 and form a seal on the first connecting hole 2011, which is conducive to forming two relatively closed cavities between the first liquid cavity 1011 and the second liquid cavity 1012. Before the weight is removed, this can maintain the supporting function of the gas spring. After the weight is removed, the first spring 33 will recover from the deformation and drive the first sealing ring 32 to leave the end of the first connecting hole 2011.

[0070] In the embodiment of the present application, the first sealing ring 32 can fill the end of the first connecting hole 2011 by deforming, so as to achieve sealing of the first connecting hole 2011 and further seal the first flow channel 201 .

[0071] In the embodiment of the present application, the first sealing ring 32 may be a rectangular sealing ring or an O-shaped sealing ring.

[0072] In some of the embodiments of this application, Figure 4 and Figure 5As shown, the locking assembly 3 includes a support 35 , a spring spirally extending along a first direction, one end of the first spring 33 is connected to the locking sleeve 31 , and the support 35 connects the other end of the spring and the piston 2 .

[0073] It is understandable that the support 35 can withstand the elastic force generated by the first spring 33 and act on the piston 2, which is conducive to the deformation of the first spring 33 and the cooperation between the locking sleeve 31 and the first sealing ring 32 and the second sealing ring 34 to form a sealing effect on the first flow channel 201 and the second flow channel 202.

[0074] In the embodiment of the present application, the support 35 can be connected to the piston 2 by means of snap connection or the like.

[0075] In some of the embodiments of this application, Figure 4 and Figure 5 As shown, the piston 2 has a limiting portion 25 , which is located at one end where the second flow channel 202 is connected to the first liquid chamber 1011 , and the second sealing ring 34 is located between the limiting portion 25 and the locking sleeve 31 .

[0076] It is understandable that the limiting portion 25 can limit the second sealing ring 34 so that the second sealing ring 34 can always be located in the second flow channel 202 , which is conducive to the cooperation between the second sealing ring 34 and the locking sleeve 31 to form a sealing effect on the second flow channel 202 .

[0077] In the embodiment of the present application, the limiting portion 25 may be annular in shape, and the annular limiting portion 25 extends along the circumference of the piston 2 .

[0078] In some of the embodiments of this application, Figure 2 and Figure 4 As shown, the gas spring includes a rod body 4, which is connected to the piston 2 and extends from the second liquid chamber 1012 to the cylinder 1.

[0079] It is understandable that the rod body 4 can be connected to a weight to transmit the gravity from the weight to the piston 2, thereby facilitating the weight to drive the piston 2 to move.

[0080] In the embodiment of the present application, the axial direction of the rod body 4 may extend along the first direction.

[0081] In the embodiment of the present application, the rod body 4 can be connected to the piston 2 by means of snap connection or the like.

[0082] In some of the embodiments of this application, Figure 6 and Figure 7 As shown, the first flow channel 201 penetrates the piston 2 along the first direction, and the rod body 4 seals one end of the first flow channel 201 close to the second liquid chamber 1012. The arrows in the figure indicate the flow direction of the liquid.

[0083] It can be understood that the first flow channel 201 penetrates the piston 2 along the first direction, which is beneficial to the manufacture of the piston 2. The rod body 4 seals the end of the first flow channel 201 close to the second liquid chamber 1012, which can reduce the leakage of liquid from the above position of the first flow channel 201, and is also beneficial for the rod body 4 to apply the gravity from the heavy object to the piston 2.

[0084] In the embodiment of the present application, the rod body 4 can extend into the first flow channel 201 , and a sealing ring can be arranged between the rod body 4 and the first flow channel 201 to form a seal through the sealing ring.

[0085] In the embodiment of the present application, a limiting groove may be provided on the side wall of the portion of the rod body 4 extending into the first flow channel 201, and a sealing ring may be placed in the limiting groove.

[0086] In some of the embodiments of this application, Figure 4 and Figure 5 As shown, the piston 2 has a convex portion 26 , the locking sleeve 31 has a first groove 3102 , and the locking sleeve 31 can move along a first direction so that the first groove 3102 and the convex portion 26 can be matched and separated.

[0087] It can be understood that when the first groove 3102 cooperates with the convex part 26, the lock sleeve 31 cannot continue to move toward the first liquid chamber 1011 along the first direction relative to the piston 2; when the first groove 3102 separates from the convex part 26, the lock sleeve 31 can move toward the first liquid chamber 1011 or the second liquid chamber 1012 along the first direction relative to the piston 2. This is conducive to the piston 2 having a limiting effect on the lock sleeve 31, and is conducive to the first spring 33 maintaining a certain elastic force, and then compressing and restoring deformation with the movement of the lock sleeve 31.

[0088] In the embodiment of the present application, the protrusion 26 may be in the form of an annular structure, or may be in the form of a plurality of independent block structures arranged at intervals along the circumference of the piston 2 .

[0089] In some of the embodiments of this application, Figure 6 and Figure 7 As shown, the outer side of the piston 2 has a second annular groove 203, the first sealing ring 32 is located in the second annular groove 203, the inner wall of the locking sleeve 31 abuts against the first sealing ring 32, the first flow channel 201 has a first connecting hole 2011, the end of the first connecting hole 2011 extends to the outer wall of the piston 2 and is connected to the second flow channel 202, the end of the first connecting hole 2011 and the second annular groove 203 are arranged in sequence along the first direction, and the second annular groove 203 is closer to the second liquid chamber 1012 than the first connecting hole 2011.

[0090] It can be understood that the second annular groove 203 has a limiting effect on the first sealing ring 32, which is conducive to the first sealing ring 32 to form a seal by abutting against the inner wall of the lock sleeve 31. Since the second annular groove 203 is closer to the second liquid chamber 1012 than the first connecting hole 2011, the liquid flow between the first flow channel 201 and the second flow channel 202 can be limited. The second annular groove 203 also provides a space for the first sealing ring 32 to deform, which can reduce the first sealing ring 32 from being squeezed by the piston 2 and the lock sleeve 31, which is conducive to improving the reliability of the gas spring.

[0091] In some of the embodiments of this application, Figure 6 and Figure 7 As shown, the lock sleeve 31 has a first through hole 3103, which penetrates the lock sleeve 31 along the second direction, and is located between the first sealing ring 32 and the second sealing ring 34. The end of the first connecting hole 2011 is located between the first sealing ring 32 and the second sealing ring 34, and the second direction intersects with the first direction.

[0092] It can be understood that the first through hole 3103 is conducive to the connection between the first flow channel 201 and the second flow channel 202, reducing the obstruction of the lock sleeve 31 to the liquid. When the weight suddenly increases and causes the gas spring to fail, the first through hole 3103 can move toward the first sealing ring 32 with the lock sleeve 31, so that the first seal covers the end of the first through hole 3103 and deforms to form a seal on the first through hole 3103, or passes over the end of the first through hole 3103, and cooperates with the piston 2 and the lock sleeve 31 to form a seal, thereby delaying or preventing the liquid in the second flow channel 202 from passing through the first through hole 3103 into the first flow channel 201, which is conducive to the first liquid chamber 1011 and the second liquid chamber 1012 forming two relatively closed cavities. Before the weight is removed, this can maintain the support function of the gas spring.

[0093] In the embodiment of the present application, the number of the first through holes 3103 can be 1, 2, or 3, or other numbers. When the number of the first through holes 3103 is 2 or more, they can be arranged at intervals along the circumference of the locking sleeve 31 .

[0094] In the embodiment of the present application, the first direction is perpendicular to the second direction.

[0095] In some of the embodiments of this application, Figure 8 and Fig. 9 As shown, the inner wall of the lock sleeve 31 has a second groove 3104, and a portion of the first sealing ring 32 is located in the second groove 3104. The arrows in the figure indicate the flow direction of the liquid.

[0096] It can be understood that the second groove 3104 is conducive to accommodating the first sealing ring 32, which can reduce the deformation of the first sealing ring 32 caused by the extrusion of the lock sleeve 31 and the piston 2, which is conducive to improving the flowability between the first flow channel 201 and the second flow channel 202. At the same time, the second groove 3104 can squeeze the first sealing ring 32 as the lock sleeve 31 moves, and the first sealing ring 32 after extrusion is deformed, which can form a seal on the third through hole and the gap between the piston 2 and the lock sleeve 31, which is conducive to forming two relatively closed cavities between the first liquid chamber 1011 and the second liquid chamber 1012. Before the heavy object is removed, this can maintain the supporting function of the gas spring.

[0097] In the embodiment of the present application, the number of the second grooves 3104 may be 1, 2, or 3, or other numbers. When the number of the second grooves 3104 is 2 or more, they may be arranged at intervals along the circumference of the locking sleeve 31 .

[0098] In some of the embodiments of this application, Fig.10 and Fig.11 As shown, the gas spring includes a rod body 4, the piston 2 includes a main body 22, a first baffle 23 and a second baffle 24, the first flow channel 201 penetrates the main body 22 along a first direction, the first baffle 23 and the second baffle 24 are respectively located at both ends of the first flow channel 201, the rod body 4 is penetrated in the first flow channel 201, and is respectively connected to the first baffle 23 and the second baffle 24, and the side wall of the accommodating cavity 101, the first baffle 23, the main body 22 and the second baffle 24 form a second flow channel 202. Arrows in the figure indicate the flow direction of the liquid.

[0099] It is understandable that the rod body 4 can transmit the gravity from the heavy object, thereby driving the main body 22 to move along the first direction. The first baffle 23 can limit the first sealing ring 32, which is conducive to the first sealing ring 32 being kept in the second flow channel 202. The second baffle 24 can connect and support the first spring 33, which is conducive to the deformation and recovery of the first spring 33 under the action of the locking sleeve 31. The second through hole 2401 and the second connecting hole 2012 are all connected to the second flow channel 202, and can allow liquid to enter the first flow channel 201 and the second flow channel 202 from the first liquid cavity 1011.

[0100] In the embodiment of the present application, a sealing ring may be provided between the rod body 4 and the side wall of the first flow channel 201 , thereby improving the sealing performance of the first flow channel 201 .

[0101] In the embodiment of the present application, the first baffle 23 has a second through hole 2401 , the first flow channel 201 has a second connecting hole 2012 , the second through hole 2401 , the second connecting hole 2012 and the second flow channel 202 are all connected, and the second sealing ring 34 can seal the second through hole 2401 and the second connecting hole 2012 .

[0102] In some of the embodiments of this application, Figure 7 As shown, the piston 2 has a sink 204, and the sink 204 is connected to the first connecting hole 2011 and the second annular groove 203. The sink 204 can improve the efficiency of the liquid in the first flow channel 201 entering the second flow channel 202.

[0103] In the embodiment of the present application, the end of the first connecting hole 2011 and the opening of the second annular groove 203 may be located at the bottom of the sink 204, so that the sink 204 can connect the two.

[0104] In the embodiment of the present application, the first flow channel 201 has a first connecting hole 2011 and a second connecting hole 2012. The first connecting hole 2011 is connected to the second flow channel 202, and the second connecting hole 2012 is connected to the first liquid chamber 1011. The area of ​​the channel cross-section of the first connecting hole 2011 is greater than the area of ​​the channel cross-section of the second connecting hole 2012.

[0105] In some of the embodiments of this application, Fig.12 As shown, the piston 2 includes a valve core 21, which is located in the first flow channel 201. The valve core 21 is configured to open when the force along the first direction toward the first liquid chamber 1011 is greater than a set value to connect the first liquid chamber 1011 and the first flow channel 201.

[0106] It is understandable that when the valve core 21 is closed, the liquid circulation path between the first liquid chamber 1011 and the second liquid chamber 1012 can be reduced, which is conducive to increasing and maintaining the reaction force of the piston 2 on the weight, thereby increasing the pulling force required for the gas spring to stretch.

[0107] In the embodiment of the present application, the valve core 21 can be opened by improving its own mechanical structure when a force greater than a set value is applied.

[0108] In some of the embodiments of this application, Fig.12 As shown, the valve core 21 includes a core shaft 211, a sealing portion 212 and a reset member 213. The core shaft 211 and the sealing portion 212 are located in the first flow channel 201, and cooperate with the sealing portion 212 to seal the end of the first flow channel 201 connected to the first liquid chamber 1011. The core shaft 211 can move along the first direction relative to the sealing portion 212 to move under the action force, so that the end of the first flow channel 201 connected to the first liquid chamber 1011 is connected to the first liquid chamber 1011. The reset member 213 is used to provide a reset force to the core shaft 211 when the core shaft 211 moves relative to the sealing portion 212. The first flow channel 201 has a second communicating hole 2012, and the end of the second communicating hole 2012 extends to the second flow channel 202. The end of the second communicating hole 2012 is located at one end of the locking sleeve 31 close to the first liquid chamber 1011.

[0109] It can be understood that when the piston 2 moves toward the first liquid chamber 1011 along the first direction, the volume of the first liquid chamber 1011 decreases, and the liquid in the first liquid chamber 1011 acts on the core shaft 211, so that the core shaft 211 maintains the state of sealing the first flow channel 201, and the second sealing ring 34 cooperates with the locking sleeve 31 to seal the gap between the locking sleeve 31 and the side wall of the accommodating chamber 101. At this time, the liquid enters the second flow channel 202 through the gap between the piston 2 and the side wall of the accommodating chamber 101, and enters the first flow channel 202 through the second connecting hole 2012 of the second flow channel 202. 1, and then enters the second flow channel 202 and the second liquid chamber 1012 from the first flow channel 201; when the piston 2 moves toward the second liquid chamber 1012 along the first direction, the volume of the second liquid chamber 1012 becomes smaller, and the second sealing ring 34 cooperates with the piston 2 to seal the gap between the piston 2 and the side wall of the accommodating chamber 101, and the liquid in the second liquid chamber 1012 enters the first flow channel 201 through the second flow channel 202 and acts on the core shaft 211. When the pressure acting on the core shaft 211 is greater than the set value, the core shaft 211 opens, and the liquid can enter the first liquid chamber 1011.

[0110] In some of the embodiments of this application, Fig.12 As shown, the core shaft 211 includes a first section 2111 and a second section 2112 , the first section 2111 is connected to the second section 2112 , the radial cross-sectional area of ​​the first section 2111 is larger than the radial cross-sectional area of ​​the second section 2112 , and the second section 2112 is closer to the first liquid chamber 1011 than the first section 2111 .

[0111] It is understandable that the first section 2111 can seal the first flow channel 201 by cooperating with the sealing portion 212, so that the liquid cannot directly enter the first liquid cavity 1011 from the first flow channel 201. The second section 2112 has a smaller radial cross-sectional area, which allows the liquid to pass through, so that the liquid directly enters the first liquid cavity 1011 from the first flow channel 201.

[0112] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0113] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0114] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A gas spring, characterized in that: The gas spring comprises a cylinder (1), a piston (2) and a locking assembly (3), wherein the piston (2) has a first flow channel (201), wherein: The cylinder (1) has a containing cavity (101); The piston (2) is located in the accommodating chamber (101) and is movable along a first direction, and the piston (2) divides the accommodating chamber (101) into a first liquid chamber (1011) and a second liquid chamber (1012) along the first direction; The piston (2) and the side wall of the accommodating chamber (101) form a second flow channel (202); the first liquid chamber (1011), the first flow channel (201), the second flow channel (202) and the second liquid chamber (1012) are connected in sequence; and the second flow channel (202) is also connected to the first liquid chamber (1011) and the second liquid chamber (1012); The locking assembly (3) is located in the second flow channel (202), and is configured to seal the second flow channel (202) and relatively seal the first flow channel (201) and the second flow channel (202) when the moving speed of the locking assembly (3) along the first direction is greater than a preset value.

2. The gas spring according to claim 1, characterized in that: The locking assembly (3) comprises a locking sleeve (31), a first sealing ring (32), a first spring (33) and a second sealing ring (34); the locking sleeve (31) is sleeved on the outer wall of the piston (2); the first sealing ring (32) is sleeved between the locking sleeve (31) and the piston (2); the locking sleeve (31) is movable relative to the piston (2) along the first direction so as to cooperate with the first sealing ring (32) to relatively seal the first flow channel (201) and the second flow channel (202); the locking sleeve (31), the first spring (33) and the second sealing ring (34) are located in the second flow channel (202); the first spring (33) and the second sealing ring (34) are respectively located at two ends of the locking sleeve (31) along the first direction; the first spring (33) spirally extends along the first direction and connects the locking sleeve (31) and the piston (2).

3. The gas spring according to claim 2, characterized in that: The inner side of the locking sleeve (31) has a first annular groove (3101), the first sealing ring (32) is located in the first annular groove (3101), the first flow channel (201) has a first connecting hole (2011), the end of the first connecting hole (2011) extends to the outer wall of the piston (2) and is connected to the second flow channel (202), and the end of the first connecting hole (2011) and the first sealing ring (32) are arranged in sequence along the first direction.

4. The gas spring according to claim 3, characterized in that: The locking assembly (3) comprises a support (35), one end of the first spring (33) is connected to the locking sleeve (31), and the support (35) connects the other end of the first spring (33) and the piston (2).

5. The gas spring according to claim 2, characterized in that: The piston (2) has a limiting portion (25), the limiting portion (25) is located at one end of the second flow channel (202) communicating with the first liquid chamber (1011), and the second sealing ring (34) is located between the limiting portion (25) and the locking sleeve (31).

6. The gas spring according to claim 2, characterized in that: The gas spring comprises a rod body (4), the rod body (4) is connected to the piston (2) and extends from the second liquid chamber (1012) to the cylinder body (1).

7. The gas spring according to claim 6, characterized in that: The first flow channel (201) passes through the piston (2) along the first direction, and the rod body (4) seals an end of the first flow channel (201) close to the second liquid chamber (1012).

8. The gas spring according to claim 2, characterized in that: The piston (2) has a convex portion (26), the locking sleeve (31) has a first groove (3102), and the locking sleeve (31) is capable of moving along the first direction so that the first groove (3102) and the convex portion (26) are matched and separated.

9. The gas spring according to claim 2, characterized in that: The outer side of the piston (2) has a second annular groove (203), the first sealing ring (32) is located in the second annular groove (203), the inner wall of the locking sleeve (31) is in contact with the first sealing ring (32), the first flow channel (201) has a first connecting hole (2011), the end of the first connecting hole (2011) extends to the outer wall of the piston (2) and is connected to the second flow channel (202), the end of the first connecting hole (2011) and the second annular groove (203) are arranged in sequence along the first direction, and the second annular groove (203) is closer to the second liquid chamber (1012) than the first connecting hole (2011).

10. The gas spring according to claim 9, characterized in that The locking sleeve (31) has a first through hole (3103), the first through hole (3103) passes through the locking sleeve (31) along a second direction, the first through hole (3103) is located between the first sealing ring (32) and the second sealing ring (34), the end of the first connecting hole (2011) is located between the first sealing ring (32) and the second sealing ring (34), and the second direction intersects with the first direction.

11. The gas spring according to claim 9, characterized in that: The inner wall of the locking sleeve (31) has a second groove (3104), and a portion of the first sealing ring (32) is located in the second groove (3104).

12. The gas spring according to claim 11, characterized in that The gas spring comprises a rod body (4); the piston (2) comprises a main body (22), a first baffle (23) and a second baffle (24); the first flow channel (201) penetrates the main body (22) along the first direction; the first baffle (23) and the second baffle (24) are respectively located at two ends of the first flow channel (201); the rod body (4) is arranged in the first flow channel (201) and is respectively connected to the first baffle (23) and the second baffle (24); the second flow channel (202) is surrounded by the side wall of the accommodating cavity (101), the first baffle (23), the main body (22) and the second baffle (24).

13. The gas spring according to claim 12, characterized in that The piston (2) has a recessed groove (204), and the recessed groove (204) is connected to the first connecting hole (2011) and the second annular groove (203).

14. The gas spring according to any one of claims 2 to 13, characterized in that: The piston (2) comprises a valve core (21), wherein the valve core (21) is located in the first flow channel (201), and the valve core (21) is configured to open when a force acting along the first direction toward the second liquid chamber (1012) is greater than a set value, so as to connect the first liquid chamber (1011) and the first flow channel (201).

15. The gas spring according to claim 14, characterized in that The valve core (21) comprises a core shaft (211), a sealing portion (212) and a reset member (213); the core shaft (211) and the sealing portion (212) are located in the first flow channel (201) and cooperate with the sealing portion (212) to seal an end of the first flow channel (201) communicating with the first liquid chamber (1011); the core shaft (211) can move relative to the sealing portion (212) along the first direction to be moved by the force, so that the first flow channel (201) and the first liquid chamber are connected. One end of the locking sleeve (31) is connected to the first liquid chamber (1011), and the reset member (213) is used to provide a reset force to the core shaft (211) when the core shaft (211) moves relative to the sealing portion (212). The first flow channel (201) has a second connecting hole (2012), and the end of the second connecting hole (2012) extends to the second flow channel (202). The end of the second connecting hole (2012) is located at one end of the locking sleeve (31) close to the first liquid chamber (1011).

16. The gas spring according to claim 14, characterized in that The core shaft (211) includes a first section (2111) and a second section (2112), the first section (2111) is connected to the second section (2112), the radial cross-sectional area of ​​the first section (2111) is greater than the radial cross-sectional area of ​​the second section (2112), and the second section (2112) is closer to the first liquid chamber (1011) than the first section (2111).

Images