Patent No.:CN205859030U Date:2016-08-11

Google Patent: https://patents.google.com/patent/CN205859030U/en?oq=CN205859030U

China Patent: http://epub.cnipa.gov.cn/

An Electrically Compressible Gas Spring

Abstract

This utility model relates to an electrically compressible gas spring, comprising a gas spring device and a linear telescopic driving device connected to the gas spring device. The gas spring device includes a cylinder, a hollow piston rod set inside the cylinder, a piston device set on the hollow piston rod, inert gas set inside the cylinder, a guiding sealing assembly set between the right end of the cylinder and the outer side wall of the hollow piston rod, a rod chamber set on the right side of the piston device, and a non-rod chamber set on the left side of the piston device. This utility model operates smoothly and uniformly, has an optimized structure, and good manufacturability.

Description

An Electrically Compressible Gas Spring

Technical Field This utility model relates to an electrically compressible gas spring.

Background Technology Traditional gas springs use a solid round steel rod for the piston rod and a simple common rear plug, requiring a damping hole for design simplicity, which does not meet the requirements for automated and intelligent equipment.

Utility Model Content The technical problem to be solved by this utility model is to provide an electrically compressible gas spring that is reasonably designed, compact in structure, and easy to use.

To solve the above problems, the technical solution adopted by this utility model is: An electrically compressible gas spring, comprising a gas spring device and a linear telescopic driving device connected to the gas spring device.

Further, the gas spring device includes a cylinder, a hollow piston rod installed inside the cylinder, inert gas set inside the cylinder, a guiding sealing assembly set between the right end of the cylinder and the outer side wall of the hollow piston rod, a piston device set on the hollow piston rod, a rod chamber set on the right side of the piston device, and a non-rod chamber set on the left side of the piston device; the piston device is located on the left side of the guiding sealing assembly.

Further, the linear telescopic driving device includes a sealed guiding tube set inside the cylinder, a screw nut, and a guiding ring set on the left end of the screw nut’s screw; the screw nut is fixed on the sealed guiding tube, and the screw nut’s screw is set to extend and retract synchronously with the hollow piston rod; the guiding ring is set inside the sealed guiding tube, which is sealed with the inner cavity of the cylinder, the screw nut, sealed guiding tube, and cylinder’s inner hole, as well as the hollow piston rod, are coaxially set.

Further, the sealed guiding tube is sealed with the inner cavity of the cylinder through the piston device.

Further, the right end of the screw nut’s screw is connected to a reduction device, which is connected to a motor. The motor’s wiring port is connected to a power source, and the right end of the hollow piston rod is clamped onto the reduction device.

Further, the reduction device is a straight-tooth reducer, with the right end of the screw nut’s screw connected to the reduction device’s output hole through an anti-disassembly snap ring.

Further, a rear plug is sealed at the left end of the cylinder, located at the left end of the sealed guiding tube, and integrated.

Further, the piston device includes a piston set on the hollow piston rod, a hole sealing ring set between the inner side wall of the piston and the outer side wall of the sealed guiding tube, and/or a second shaft sealing ring set between the inner side wall of the piston and the outer side wall of the sealed guiding tube, a first shaft sealing ring set between the outer side wall of the piston and the inner side wall of the cylinder, an annular groove set on the outer side wall of the piston for placing the first shaft sealing ring, a vent hole set on the piston, and a fitting gap set between the outer side wall of the piston and the inner side wall of the cylinder; the rod chamber and the non-rod chamber correspond to the bottom of the annular groove through the vent hole.

Further, as shown in Figure 3, a directional guiding outer sleeve coaxially set with the hollow piston rod is clamped at the right end of the cylinder; the reduction device and the motor are slidably set inside the directional guiding outer sleeve through the screw nut.

Further, the screw nut’s screw has at least two threads, and a sealing stop ring for fixing the hole sealing ring is set at the left end of the piston.

Advantages: This utility model drives the hollow piston rod to reciprocate in the cylinder through the motor, reduction device, and screw nut, with the guiding ring providing support and guidance. The sealed guiding tube reduces the overall size, ensuring a reasonable structure and scientific design. The first shaft sealing ring, fitting gap, and vent hole enable ventilation, resulting in smooth and uniform operation, optimized structure, and good manufacturability.

Drawings:

• Figure 1: Structural schematic diagram of this utility model.
• Figure 2: Structural schematic diagram of the piston device in this utility model.
• Figure 3: Structural schematic diagram of a variation of this utility model.

Components:

1. Hollow piston rod
2. Cylinder
3. Guiding sealing assembly
4. Piston device
5. Inert gas
6. Rear plug
7. Hole sealing ring
8. Screw nut
9. Guiding ring
10. Reduction device
11. Wiring port
12. Motor
13. Directional guiding outer sleeve
14. Anti-disassembly snap ring
15. Sealed guiding tube
16. Rod chamber
17. Non-rod chamber
18. First shaft sealing ring
19. Fitting gap
20. Vent hole
21. Piston
22. Sealing stop ring

Specific Implementation: As shown in Figures 1-3, this utility model includes a gas spring device and a linear telescopic driving device connected to the gas spring device.

Further, the gas spring device includes a cylinder 2, a hollow piston rod 1 installed inside the cylinder 2, inert gas 5 set inside the cylinder 2, a guiding sealing assembly 3 set between the right end of the cylinder 2 and the outer side wall of the hollow piston rod 1, a piston device 4 set on the hollow piston rod 1, a rod chamber 16 set on the right side of the piston device 4, and a non-rod chamber 17 set on the left side of the piston device 4; the piston device 4 is located on the left side of the guiding sealing assembly 3.

Further, the linear telescopic driving device includes a sealed guiding tube 15 set inside the cylinder 2, a screw nut 8, and a guiding ring 9 set on the left end of the screw nut 8’s screw; the screw nut 8 is fixed on the sealed guiding tube 15, and the screw nut 8’s screw is set to extend and retract synchronously with the hollow piston rod 1; the guiding ring 9 is set inside the sealed guiding tube 15, which is sealed with the inner cavity of the cylinder 2, the screw nut 8, sealed guiding tube 15, and cylinder 2’s inner hole, as well as the hollow piston rod 1, are coaxially set.

Further, the sealed guiding tube 15 is sealed with the inner cavity of the cylinder 2 through the piston device 4.

Further, the right end of the screw nut 8’s screw is connected to a reduction device 10, which is connected to a motor 12. The motor 12’s wiring port 11 is connected to a power source, and the right end of the hollow piston rod 1 is clamped onto the reduction device 10.

Further, the reduction device 10 is a straight-tooth reducer, with the right end of the screw nut 8’s screw connected to the reduction device 10’s output hole through an anti-disassembly snap ring 14.

Further, a rear plug 6 is sealed at the left end of the cylinder 2, located at the left end of the sealed guiding tube 15, and integrated.

Further, the piston device 4 includes a piston 21 set on the hollow piston rod 1, a hole sealing ring 7 set between the inner side wall of the piston 21 and the outer side wall of the sealed guiding tube 15, and/or a second shaft sealing ring set between the inner side wall of the piston 21 and the outer side wall of the sealed guiding tube 15, a first shaft sealing ring 18 set between the outer side wall of the piston 21 and the inner side wall of the cylinder 2, an annular groove set on the outer side wall of the piston 21 for placing the first shaft sealing ring 18, a vent hole 20 set on the piston 21, and a fitting gap 19 set between the outer side wall of the piston 21 and the inner side wall of the cylinder 2; the rod chamber 16 and the non-rod chamber 17 correspond to the bottom of the annular groove through the vent hole 20.

Further, as shown in Figure 3, a directional guiding outer sleeve 13 coaxially set with the hollow piston rod 1 is clamped at the right end of the cylinder 2; the reduction device 10 and the motor 12 are slidably set inside the directional guiding outer sleeve 13 through the screw nut 8.

Further, the screw nut’s screw has at least two threads, and a sealing stop ring for fixing the hole sealing ring is set at the left end of the piston. Components:

• Hollow piston rod 1
• Cylinder 2
• Guiding sealing assembly 3
• Piston device 4
• Inert gas 5
• Rear plug 6
• Hole sealing ring 7
• Screw nut 8
• Guiding ring 9
• Reduction device 10
• Wiring port 11
• Motor 12
• Directional guiding outer sleeve 13
• Anti-disassembly snap ring 14
• Sealed guiding tube 15
• Rod chamber 16
• Non-rod chamber 17
• First shaft sealing ring 18
• Fitting gap 19
• Vent hole 20
• Piston 21
• Sealing stop ring 22

This utility model is particularly suitable for electric car tailgate rods. The hollow piston rod 1 is made of hollow precision-drawn steel pipe. The rear plug 6 and the sealed guiding tube 15 are made by welding a section of precision-drawn steel pipe on the inner end of the rear plug 6, thereby extending the life of the electric gas spring, reducing wear, and minimizing the overall size. With the effect of the second shaft sealing ring and/or the hole sealing ring 7 on the piston device 4, it isolates the mechanical assembly and movement space of the electric control gas spring. The electric gas spring performance in terms of lifespan and friction is thus improved.

The linear telescopic driving device can use existing electric push rods or other common linear reciprocating mechanisms. The screw threads of the screw nut 8 are determined according to actual needs to improve service life. The piston device 4 does not require a damping hole, and the shared vent hole 20 can be used since its bidirectional movement is driven by the electric components. The opening and closing speeds depend on the number of screw threads in the screw nut 8, and both opening and closing are at a uniform speed.

The hollow piston rod 1, rear plug 6, and sealed guiding tube 15 are the core of this utility model. The hole sealing ring 7, the second shaft sealing ring, and the guiding ring 9 are key to ensuring the performance of the electric gas spring.

This utility model drives the hollow piston rod 1 to reciprocate in the cylinder 2 through the motor 12, reduction device 10, and screw nut 8, with the guiding ring 9 providing support and guidance. The sealed guiding tube 15 reduces the overall size, ensuring a reasonable structure and scientific design. The first shaft sealing ring 18, fitting gap 19, and vent hole 20 enable ventilation, resulting in smooth and uniform operation, optimized structure, and good manufacturability.

It should be noted that the above embodiments are only for illustrating the technical solutions of this utility model, not for limiting them. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements for some of the technical features. These modifications or replacements do not deviate from the spirit and scope of the corresponding technical solutions of this utility model.

Claims (10) – An Electrically Compressible Gas Spring, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacturer

1. An electrically compressible gas spring, characterized by: including a gas spring device and a linear telescopic driving device connected to the gas spring device.
2. According to claim 1, characterized by: the gas spring device includes a cylinder (2), a hollow piston rod (1) installed inside the cylinder (2), inert gas (5) set inside the cylinder (2), a guiding sealing assembly (3) set between the right end of the cylinder (2) and the outer side wall of the hollow piston rod (1), a piston device (4) set on the hollow piston rod (1), a rod chamber (16) set on the right side of the piston device (4), and a non-rod chamber (17) set on the left side of the piston device (4); the piston device (4) is located on the left side of the guiding sealing assembly (3).
3. According to claim 2, characterized by: the linear telescopic driving device includes a sealed guiding tube (15) set inside the cylinder (2), a screw nut (8), and a guiding ring (9) set on the left end of the screw nut (8)’s screw; the screw nut (8) is fixed on the sealed guiding tube (15), and the screw nut’s screw is set to extend and retract synchronously with the hollow piston rod (1); the guiding ring (9) is set inside the sealed guiding tube (15), which is sealed with the inner cavity of the cylinder (2); the screw nut (8), sealed guiding tube (15), and the cylinder (2)’s inner hole, as well as the hollow piston rod (1), are coaxially set.
4. According to claim 3, characterized by: the sealed guiding tube (15) is sealed with the inner cavity of the cylinder (2) through the piston device (4).
5. According to claim 4, characterized by: the right end of the screw nut’s screw is connected to a reduction device (10), which is connected to a motor (12). The motor’s wiring port (11) is connected to a power source, and the right end of the hollow piston rod (1) is clamped onto the reduction device (10).
6. According to claim 5, characterized by: the reduction device (10) is a straight-tooth reducer, with the right end of the screw nut’s screw connected to the reduction device’s output hole through an anti-disassembly snap ring (14).
7. According to claim 6, characterized by: a rear plug (6) is sealed at the left end of the cylinder (2), located at the left end of the sealed guiding tube (15), and integrated.
8. According to claim 7, characterized by: the piston device (4) includes a piston (21) set on the hollow piston rod (1), a hole sealing ring (7) set between the inner side wall of the piston (21) and the outer side wall of the sealed guiding tube (15), and/or a second shaft sealing ring set between the inner side wall of the piston (21) and the outer side wall of the sealed guiding tube (15), a first shaft sealing ring (18) set between the outer side wall of the piston (21) and the inner side wall of the cylinder (2), an annular groove set on the outer side wall of the piston (21) for placing the first shaft sealing ring (18), a vent hole (20) set on the piston (21), and a fitting gap (19) set between the outer side wall of the piston (21) and the inner side wall of the cylinder (2); the rod chamber (16) and the non-rod chamber (17) correspond to the bottom of the annular groove through the vent hole (20).
9. According to claim 8, characterized by: a directional guiding outer sleeve (13) coaxially set with the hollow piston rod (1) is clamped at the right end of the cylinder (2); the reduction device (10) and the motor (12) are slidably set inside the directional guiding outer sleeve (13) through the screw nut (8).
10. According to claim 8, characterized by: the screw nut’s screw has at least two threads, and a sealing stop ring (22) for fixing the hole sealing ring (7) is set at the left end of the piston (21).