Double-control gas spring

Abstract

The utility model relates to the technical field of gas springs, in particular to a double-control gas spring. Comprising a mandrel and push rods, the mandrel is provided with a large-diameter section and a small-diameter section; the large-diameter section is sleeved with a sealing ring, and the position of the sealing ring is fixed. The small-diameter section is in direct contact with the push rod; when the large-diameter section is matched with the sealing ring, the rodless cavity and the rod cavity are blocked; when the rod cavity is compressed to push the large-diameter section or the push rod drives the large-diameter section to move towards the rodless cavity, the small-diameter section moves to the position of the sealing ring, and the rodless cavity is communicated with the rod cavity. Through two different unlocking modes, the adjustment operation of the double-control air spring is more convenient and diversified.

Description

Technical Field

[0001] The utility model relates to the technical field of gas springs, in particular to a double-control gas spring. Background Art

[0002] Double-control gas springs are widely used in devices that need to adjust positions and angles. When double-control gas springs are applied to seat angle adjustment mechanisms of vehicles, airplanes, ships, etc., when the front-row seat passengers leave and do not retract the seat backrest, it affects the sitting space of the rear-row passengers. If the rear-row passengers want to retract the front-row seat backrest, they can only go to the armrest of the front-row seat and press the operation button, which brings great inconvenience to the rear-row passengers. To solve the problems of single unlocking method and inconvenient unlocking operation of existing double-control gas springs, the utility model provides a double-control gas spring. Content of the Utility Model

[0003] The utility model provides a double-control gas spring to alleviate the problems of single unlocking method and inconvenient unlocking operation of gas springs existing in the prior art.

[0004] In order to alleviate the above technical problems, the technical solution provided by the utility model lies in:

[0005] It includes a core shaft and a push rod. The core shaft is provided with a thick-diameter section and a thin-diameter section. A sealing ring is sleeved on the thick-diameter section, and the position of the sealing ring is fixed. The thin-diameter section is in direct contact with the push rod. When the thick-diameter section cooperates with the sealing ring, the rodless cavity is blocked from the rod chamber. When the rod chamber compresses to push the thick-diameter section or the push rod drives the thick-diameter section to move towards the rodless cavity, the thin-diameter section moves to the position of the sealing ring, and the rodless cavity is communicated with the rod chamber.

[0006] Further, it also includes a sealing seat. The sealing seat is axially provided with a through groove, and an annular groove is arranged inside the sealing seat. The core shaft is located in the through groove.

[0007] Further, a shoulder is arranged at one end of the thin-diameter section of the core shaft close to the push rod, and the outer diameter of the shoulder is larger than the outer diameter of the thin-diameter section.

[0008] Further, a compression spring is also sleeved on the core shaft. One end of the compression spring abuts against the sealing seat, and the other end abuts against the shoulder. The compression spring is configured to always have a tendency to drive the core shaft to move towards the rod chamber.

[0009] Further, it also includes a piston. The core shaft and the sealing seat are both embedded inside the piston.

[0010] Further, the piston is also provided with side holes and a cavity. The cavity is communicated with the rod chamber through the side holes.

[0011] Furthermore, it also includes a sleeve, one end of which is connected to the piston, and the sleeve is provided with a channel along the axial direction. The push rod is arranged in the channel, and the push rod acts on the core shaft.

[0012] Furthermore, a transition assembly is provided between the core shaft and the push rod, including a transition rod, a bushing and a gasket. The bushing and the gasket are both embedded in the channel of the sleeve and are sleeved on the transition rod.

[0013] Furthermore, an O-ring is provided between the transition rod and the sleeve, and two sides of the O-ring are respectively tightly attached to the bushing and the gasket.

[0014] Furthermore, it also includes a rubber ring, which is arranged between the piston and the sealing seat.

[0015] The beneficial effects of the dual-control gas spring in the utility model are analyzed as follows:

[0016] The utility model discloses a double-control gas spring, comprising a core shaft and a push rod; the core shaft is provided with a thick-diameter section and a thin-diameter section; a sealing ring is sleeved on the thick-diameter section, and the position of the sealing ring is fixed; the thin-diameter section is in direct contact with the push rod; when the thick-diameter section cooperates with the sealing ring, the rodless cavity and the rod cavity are blocked; when the rod cavity is compressed and pushes the thick-diameter section or the push rod drives the thick-diameter section to move in the direction of the rodless cavity, the thin-diameter section moves to the position of the sealing ring, and the rodless cavity is connected with the rod cavity.

[0017] When the gas spring is in a locked state, the thick-diameter section of the core shaft cooperates with the sealing ring, and the rodless cavity and the rod cavity are blocked; at this time, the push rod is adjusted to push the thin-diameter section of the core shaft to the sealing ring position, the rodless cavity and the rod cavity are connected, and the gas spring can be freely extended or contracted, or the gas spring can be pulled hard as a whole to compress the rod cavity, and the pressure formed by the extrusion acts on the thick-diameter section of the core shaft, causing the thick-diameter section to move toward the direction of the rodless cavity. When the thick-diameter section is out of the sealing ring position, the rodless cavity and the rod cavity are connected, and the gas spring can also be freely adjusted at this time.

[0018] During normal use, the front seat passenger can toggle the seat switch and use the push rod to drive the adjustable gas spring to change the seat back position; after the front seat passenger leaves, the rear seat passenger can also lift the front seat with force to drive the gas spring to compress the rod cavity space, release the locked state of the gas spring, adjust the seat back position, and reset the front seat back without toggling the front seat switch; in this way, the utility model realizes two different unlocking methods, making the adjustment operation of the dual-control gas spring more convenient and diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following will briefly introduce the drawings required for use in the description of the specific embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic internal structure diagram of the double-control gas spring provided by the embodiment of the present invention;

[0021] Figure 2 Schematic structure diagram of the double-control gas spring provided by the embodiment of the present invention;

[0022] Figure 3 Schematic structure diagram of the piston provided by the embodiment of the present invention;

[0023] Figure 4 Schematic structure diagram of the seal seat provided by the embodiment of the present invention;

[0024] Figure 5 Schematic structure diagram of the mandrel provided by the embodiment of the present invention.

[0025] Icon:

[0026] 001 - Rodless cavity; 002 - Rod cavity; 100 - Mandrel; 200 - Push rod; 110 - Thick diameter section; 120 - Thin diameter section; 300 - Sealing ring; 400 - Seal seat; 410 - Through groove; 420 - Ring groove; 140 - Shoulder; 500 - Compression spring; 600 - Piston; 003 - Side hole; 004 - Cavity; 700 - Sleeve; 710 - Channel; 800 - Transition assembly; 810 - Transition rod; 820 - Bushing; 830 - Gasket; 840 - O-ring; 900 - Rubber ring. Specific embodiments

[0027] Example 1

[0028] This example provides a double-control gas spring. Please refer to Figures 1 - 5 ,

[0029] including a mandrel 100 and a push rod 200; the mandrel 100 is provided with a thick diameter section 110 and a thin diameter section 120; a sealing ring 300 is sleeved on the thick diameter section 110, and the position of the sealing ring 300 is fixed; the thin diameter section 120 is in direct contact with the push rod 200; when the thick diameter section 110 cooperates with the sealing ring 300, the rodless cavity 001 and the rod cavity 002 are blocked; when the rod cavity 002 is compressed to push the thick diameter section 110 or the push rod 200 drives the thick diameter section 110 to move towards the rodless cavity 001, the thin diameter section 120 moves to the position of the sealing ring 300, and the rodless cavity 001 and the rod cavity 002 are conducted.

[0030] When the gas spring is in the locked state, the thick-diameter section 110 of the mandrel 100 cooperates with the sealing ring 300, and the rodless cavity 001 is blocked from the rod cavity 002; at this time, the adjusting push rod 200 pushes the thin-diameter section 120 of the mandrel 100 to the position of the sealing ring 300, and the rodless cavity 001 is communicated with the rod cavity 002, and the gas spring can freely expand and contract. Or pull the whole gas spring forcefully to compress the rod cavity 002, and the pressure formed by the extrusion acts on the thick-diameter section 110 of the mandrel 100, causing the thick-diameter section 110 to move in the direction of the rodless cavity 001. When the thick-diameter section 110 disengages from the position of the sealing ring 300, the rodless cavity 001 is communicated with the rod cavity 002, and the gas spring can also be freely adjusted at this time.

[0031] During normal use, the front-row seat passenger can toggle the seat switch to drive the adjusting gas spring with the push rod 200 to change the position of the seat backrest; after the front-row seat passenger leaves, the rear-row seat passenger can also lift the front-row seat forcefully to drive the gas spring to compress the space of the rod cavity 002, release the locked state of the gas spring, and adjust the position of the seat backrest. Without toggling the front-row seat switch, the front-row seat backrest can be reset; in this way, the present utility model realizes two different unlocking methods, making the adjustment operation of the double-control gas spring more convenient and diverse.

[0032] In this embodiment, a sealing seat 400 is further included. The sealing seat 400 is axially provided with a through groove 410, and a ring groove 420 is arranged inside the sealing seat 400; the mandrel 100 is located in the through groove 410.

[0033] In an alternative embodiment of this embodiment, preferably, the mandrel 100 is radially fixed through cooperation with the sealing seat 400. The outer ring of the sealing seat 400 is in contact with the piston 600. A through groove 410 is arranged inside. The diameter of the through groove 410 is close to the diameter of the thick-diameter end of the mandrel 100. A ring groove 420 with a diameter larger than the thick-diameter of the mandrel 100 is machined starting from the end face of the sealing seat 400 close to the rodless cavity 001. When the through groove 410 cooperates with the thick-diameter end of the mandrel 100, in order to prevent the rodless cavity 001 and the rod cavity 002 from being connected due to leakage, a sealing ring 300 is arranged in the ring groove 420. The end face outer circle is machined on the end face of the sealing seat 400 close to the rod cavity 002 to reserve space for the rubber ring 900 when the sealing seat 400 is assembled with the piston 600. In order to prevent the sealing seat 400 from disengaging from the piston 600 during operation, end cap fixation is also provided on one side of the sealing seat 400.

[0034] In this embodiment, a shoulder 140 is arranged at one end of the thin-diameter section 120 of the mandrel 100 close to the push rod 200, and the outer diameter of the shoulder 140 is larger than the outer diameter of the thin-diameter section 120.

[0035] In an alternative embodiment of the present example, preferably, one end of the shoulder 140 abuts against the end face of the compression spring 500, and the outer cylindrical surface of the shoulder 140 is nested in the channel 710 in the middle of the sleeve 700. When the push rod 200 pushes the thin-diameter end of the mandrel 100 to move, the shoulder 140 and the seal seat 400 compress the compression spring 500. When the push rod 200 resets, the compression spring 500 drives the shoulder 140 to restore the mandrel 100 to the state where the thick-diameter end cooperates with the sealing ring 300.

[0036] In this embodiment, a compression spring 500 is further sleeved on the mandrel 100. One end of the compression spring 500 abuts against the seal seat 400, and the other end abuts against the shoulder 140; the compression spring 500 is configured to always have a tendency to drive the mandrel 100 to move in the direction of the rod chamber 002.

[0037] In an alternative embodiment of the present example, preferably, when the compression spring 500 moves from the thin-diameter end of the mandrel 100 towards the position of the sealing ring 300, it stores potential energy. The energy stored in the compression spring 500 enables the mandrel 100 to return to its original position after being subjected to an external force.

[0038] In this embodiment, a piston 600 is further included, and both the mandrel 100 and the seal seat 400 are embedded inside the piston 600.

[0039] In an alternative embodiment of the present example, preferably, the piston 600 is arranged between the rod chamber 002 and the rodless chamber 001. When the rod chamber 002 and the rodless chamber 001 are blocked and closed, the piston 600 cannot move freely, and at this time, the gas spring is in a locked state. When the push rod 200 in the sleeve 700 drives the thin-diameter end of the mandrel 100 to move to the position of the sealing ring 300, the rod chamber 002 and the rodless chamber 001 are communicated, the pressures at both ends of the piston 600 are equal, the piston 600 can freely adjust its position, and the gas spring is in an open state where its length can be adjusted. When the gas spring is in the locked state and the sleeve 700 is pulled to the right, at this time, the piston 600 connected to one end of the sleeve 700 moves to compress the closed space of the rod chamber 002. Driven by the pressure generated by the compression of the mandrel 100 inside the piston 600, the thick-diameter end continuously protrudes towards the rodless chamber 001, is misaligned with the position where the sealing ring 300 is located, the rodless chamber 001 and the rod chamber 002 are communicated, and the piston 600 becomes adjustable and free again, and the gas spring briefly returns to the open state.

[0040] In this embodiment, the piston 600 is further provided with a side hole 003 and a cavity 004; the cavity 004 is communicated with the rod chamber 002 through the side hole 003.

[0041] In an alternative embodiment of the present example, preferably, the piston 600 is provided with a head end and a skirt end. The diameter of the skirt end is larger than that of the head end. A seal is provided at the skirt end of the piston 600. The skirt end of the piston 600 cooperates with the inner wall of the outer shell of the gas spring. The head end of the piston 600 is connected to the sleeve 700. A cavity 004 is formed inside the piston 600 under the action of the seal seats 400 and the transition assembly 800 at both ends. The core shaft 100 moves inside the cavity 004 and is communicated with the rod chamber 002 through the air holes provided on the outer wall of the piston 600, so that the pressure formed by the piston 600 compressing the rod chamber 002 can act on the core shaft 100.

[0042] In this embodiment, a sleeve 700 is further included. One end of the sleeve 700 is connected to the piston 600. The sleeve 700 is axially provided with a channel 710. The push rod 200 is arranged in the channel 710, and the push rod 200 acts on the core shaft 100.

[0043] In an alternative embodiment of the present example, preferably, the sleeve 700 is arranged inside the outer shell of the gas spring and is connected to the head end of the piston 600. The sleeve 700 is the movable telescopic part of the gas spring, sleeved outside the push rod 200, and a channel 710 is arranged inside. The push rod 200 passes through the channel 710 and contacts the core shaft 100 through the transition assembly 800. The transition assembly 800 in the channel 710 blocks the channel 710 to block the external environment and make the rod chamber 002 airtight. When the gas spring is in the open state, the gas spring is stretched and compressed by pulling the sleeve 700 or pushing the bottom of the sleeve 700. When the gas spring is in the locked state, pressing the head of the push rod 200 exposed in the channel 710 of the sleeve 700 or pulling the sleeve 700 forcefully can unlock the gas spring.

[0044] In this embodiment, a transition assembly 800 is further arranged between the core shaft 100 and the push rod 200, including a transition rod 810, a bushing 820 and a gasket 830. The bushing 820 and the gasket 830 are both embedded in the channel 710 of the sleeve 700 and sleeved on the transition rod 810. An O-ring 840 is further arranged between the transition rod 810 and the sleeve 700, and both sides of the O-ring 840 are closely attached to the bushing 820 and the gasket 830 respectively.

[0045] In an alternative embodiment of the present example, preferably, the push rod 200 and the core shaft 100 are connected by the transition rod 810. The bushing 820 and the gasket 830 form a bushing and are sleeved on the transition rod 810. To prevent the gas spring from leaking air, an O-ring 840 is arranged between the bushing 820 and the gasket 830. When the telescopic position of the gas spring needs to be adjusted, press the push rod 200. At this time, the transition assembly 800 fixed inside the channel 710 is driven by the push rod 200, and the transition rod 810 transmits the driving force to the core shaft 100. The core shaft 100 and the sealing ring 300 are disengaged to communicate the rod chamber 002 and the rodless chamber 001.

[0046] In this embodiment, it further includes a rubber ring 900, and the rubber ring 900 is arranged between the piston 600 and the seal seat 400.

[0047] In an alternative solution of this embodiment, preferably, a rubber ring 900 is arranged between the piston 600 and the seal seat 400. This sealing configuration of the piston 600 and the sealing ring 300, the sealing measures of the transition assembly 800 and the sleeve 700 make the cavity 004 inside the piston 600 airtight, and the cavity 004 is only communicated with the rod chamber 002 through the side hole 003 provided on the piston 600. In this embodiment, it further includes a rubber ring, and the rubber ring is arranged between the piston and the seal seat.

[0048] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-control gas spring, comprising a rodless chamber (001) and a rod chamber (002), characterized in that, it further comprises a core shaft (100) and a push rod (200); the core shaft (100) is provided with a thick-diameter section (110) and a thin-diameter section (120); a sealing ring (300) is sleeved on the thick-diameter section (110), and the position of the sealing ring (300) is fixed; the thin-diameter section (120) is driven by the push rod (200); when the thick-diameter section (110) cooperates with the sealing ring (300), the rodless chamber (001) is blocked from the rod chamber (002); when the rod chamber (002) compresses to push the thick-diameter section (110) or the push rod (200) drives the thick-diameter section (110) to move towards the rodless chamber (001), the thin-diameter section (120) moves to the position of the sealing ring (300), and the rodless chamber (001) is communicated with the rod chamber (002).

2. The double-control gas spring according to claim 1, characterized in that, it further comprises a sealing seat (400), the sealing seat (400) is axially provided with a through groove (410), and an annular groove (420) is arranged inside the sealing seat (400); the core shaft (100) is located in the through groove (410).

3. The double-control gas spring according to claim 2, characterized in that, a shoulder (140) is arranged at one end of the thin-diameter section (120) of the core shaft (100) close to the push rod (200), and the outer diameter of the shoulder (140) is larger than the outer diameter of the thin-diameter section (120).

4. The double-control gas spring according to claim 3, characterized in that, a compression spring (500) is further sleeved on the core shaft (100), one end of the compression spring (500) abuts against the sealing seat (400), and the other end abuts against the shoulder (140); the compression spring (500) is configured to always have a tendency to drive the core shaft (100) to move towards the rod chamber (002).

5. The double-control gas spring according to claim 4, characterized in that, it further comprises a piston (600), and the core shaft (100) and the sealing seat (400) are both embedded inside the piston (600).

6. The double-control gas spring according to claim 5, characterized in that, the piston (600) is further provided with a side hole (003) and a cavity (004); the cavity (004) is communicated with the rod chamber (002) through the side hole (003).

7. The double-control gas spring according to claim 6, characterized in that, it further comprises a sleeve (700), one end of the sleeve (700) is connected to the piston (600); the sleeve (700) is axially provided with a channel (710); the push rod (200) is arranged in the channel (710), and the push rod (200) acts on the core shaft (100).

8. The double-control gas spring according to claim 7, characterized in that, A transition assembly (800) is further provided between the mandrel (100) and the push rod (200), and the transition assembly (800) includes a transition rod (810), a bushing (820) and a gasket (830); Both the bushing (820) and the gasket (830) are embedded in the channel (710) of the sleeve (700) and sleeved on the transition rod (810).

9. The dual-control gas spring according to claim 8, wherein An O-ring (840) is further provided between the transition rod (810) and the sleeve (700), and both sides of the O-ring (840) are respectively in close contact with the bushing (820) and the gasket (830).

10. The dual-control gas spring according to claim 9, wherein It further includes a rubber ring (900), and the rubber ring (900) is arranged between the piston (600) and the seal seat (400).

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