Gas spring with overload protection function

Abstract

The utility model discloses a gas spring with an overload protection function, and belongs to the technical field of gas springs. The gas spring with the overload protection function comprises a gas spring body provided with an overload protection device, a telescopic piston rod is arranged in the gas spring body, the front end of the piston rod is fixedly connected with a top, a sleeve with an adjustable function is fixedly arranged on the outer surface of the gas spring body in a sleeved mode, and threads are arranged on the outer wall of the sleeve. The overload protection device comprises an end portion and a tail portion, the tail portion is in threaded connection with the sleeve, and the overload protection position is adjusted in a threaded mode. According to the overload protection device for the gas spring, the connecting piece at the tail of the overload protection device is connected with the sleeve through threads, the position of the overload protection device can be flexibly adjusted by twisting the connecting piece, then the position of the overload protection block is changed, the overload protection device can be suitable for various different working conditions, and a limiting device is prevented from possibly intervening too early.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas spring technical field, concretely is a gas spring with overload protection function. BACKGROUND

[0002] The gas spring is the elastic component with gas and liquid as medium, can realize support, buffering etc.

[0003] In view of this difficulty, the current method is to set fixed limit device at the key position of gas spring, and its working principle is that when the piston rod in the gas spring is overloaded, the limit device can limit the rebound movement of piston rod, avoid the excessive loss of control of support force, thereby preventing the deformation of cylinder barrel and the damage of support platform to a certain extent, and playing the role of protecting the gas spring and related equipment.

[0004] But because the limit device is fixed, its overload protection position is difficult to adjust, for example, when the load of gas spring is lighter, the fixed limit device may intervene too early, limit the normal elastic expansion range of gas spring, reduce its working efficiency, so that the gas spring cannot fully exert its support and buffering functions.

[0005] In view of the above, we propose a gas spring with flexible overload protection position, which can effectively solve these problems. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of gas springs with overload protection function, by flexible overload protection device, different scene needs of gas spring can be satisfied.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of gas spring with overload protection function, including the gas spring main body with overload protection device, the gas spring main body is internally provided with telescopic piston rod, piston rod front end is fixedly connected with top portion, its characterized in that, the sleeve with adjustable function is fixedly covered on the outer surface of gas spring main body, sleeve outer wall is equipped with screw thread, overload protection device includes end portion and tail portion, tail portion is connected with sleeve screw thread, and the position of overload protection is adjusted by screw thread mode, the distance between end portion and gas spring main body output is less than the distance between top portion and gas spring main body output, reach overload protection effect.

[0008] Preferably, the tail portion of the overload protection device is a nut-shaped connector, and the inner wall thereof is provided with an inner thread that matches the screw thread of the sleeve.

[0009] Preferably, the outer wall of the connecting piece is annularly fixedly connected with a fixed block, and the fixed block is provided with a plurality of

[0010] Preferably, the end surface of the fixed block is fixedly connected with a fixed rod, and the front end of the fixed rod is fixedly connected with the end portion of the overload protection device.

[0011] Preferably, the end portion of the overload protection device is an annular overload protection block.

[0012] Preferably, the interior of the overload protection block is a hollow structure.

[0013] Preferably, the diameter of the overload protection block is smaller than that of the top portion.

[0014] Preferably, the end surface of the overload protection block is fixedly provided with a rubber gasket.

[0015] Preferably, the diameter of the rubber gasket is smaller than that of the overload protection block, and the thickness of the rubber gasket is not less than 2 cm.

[0016] Compared with the prior art, the utility model has the beneficial effects as follows:

[0017] (1) The utility model discloses a gas spring with overload protection function, which is provided with an overload protection device, when the piston rod in the main body of the gas spring is overloaded and out of control and rebounds, the overload protection block at the end portion of the overload protection device can limit and support the top portion of the rebound, prevents the top portion from colliding with the cylinder body out of control, and avoids damaging the cylinder body and the supporting piece.

[0018] (2) The utility model discloses a gas spring with overload protection function, the connecting piece at the tail portion of the overload protection device is connected with the sleeve through a thread, the position of the connecting piece can be flexibly adjusted by screwing, and the position of the overload protection block is changed, so that the overload protection block can be suitable for various working conditions, the limiting device is prevented from being involved too early, the normal elastic extension range of the gas spring is limited, and the working efficiency is reduced.

[0019] (3) The utility model discloses a gas spring with overload protection function, the end surface of the overload protection block is fixedly provided with a rubber gasket, when the piston rod is overloaded and out of control, the top portion rebounds and touches the rubber gasket, a certain buffering effect can be formed, the rubber gasket is prevented from being pressed too much due to sudden collision, and the overload protection device and the whole gas spring structure are further protected. DRAWINGS

[0020] Figure 1 It is the whole schematic diagram of the utility model;

[0021] Figure 2 It is the whole lifting schematic diagram of the utility model;

[0022] Figure 3 It is the schematic diagram of the internal structure of the protection box of the utility model;

[0023] Figure 4 It is the schematic view of the embedded computer body angle adjustment of the utility model.

[0024] In the figure: 1, gas spring main body; 11, piston rod; 12, top; 13, sleeve; 2, connecting piece; 21, internal thread; 22, fixed block; 23, fixed rod; 3, overload protection block; 31, rubber washer. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-4 A gas spring with overload protection function, including gas spring main body 1 provided with overload protection device, the inside of gas spring main body 1 is provided with retractable piston rod 11, piston rod 11 front end fixedly connected with top 12, gas spring main body 1 outer surface fixedly provided with sleeve 13 with adjustable function, sleeve 13 outer wall is provided with thread, overload protection device includes end and tail, tail is connected with sleeve 13 by screw thread, and the position of overload protection is adjusted by screw thread mode, the distance between end and gas spring main body 1 output is less than the distance between top 12 and gas spring main body 1 output, the distance is the distance between top 12 and overload protection device end when top 12 loses control and rebounds when gas spring main body 1 main body inside reaches limit due to external force, so as to achieve overload protection effect, when using, when piston rod 11 in the inside of gas spring main body 1 is overloaded, the pressure in the inside of gas spring main body 1 reaches limit value, then it will cause piston rod 11 to rebound, the overload protection device located at the rear end of top 12 plays a role, and the overload protection block 3 of the end of overload protection device can limit support rebounding top 12, prevent it from further compressing and hitting cylinder body, and also can avoid that the pressure in the inside of cylinder body cannot be released, so as to damage cylinder body, cause cylinder body and support to be damaged, so as to achieve overload protection effect.

[0027] Further, the tail of the overload protection device is a nut-shaped connecting piece 2, the inner wall of which is provided with internal threads 21 that are threadedly adapted to the sleeve 13. The connecting piece 2 is a nut-like structural member, and the threads provided on the inner wall thereof are adapted to the threads on the outer surface of the sleeve 13. In use, the connecting piece 2 is screwed into the sleeve 13 from the rear end of the air spring body 1, so that the connecting piece 2 is installed. By screwing the connecting piece 2, the position of the connecting piece 2 can be adjusted, so that the position of the overload protection block 3 can be flexibly adjusted, and the position of the overload protection can be arbitrarily changed. This prevents the limiting device from prematurely interfering, limiting the normal elastic extension and contraction range of the air spring, and reducing the working efficiency. Therefore, the device is suitable for various working conditions.

[0028] Further, the outer wall of the connecting piece 2 is annularly fixedly connected with a plurality of fixed blocks 22. In use, the plurality of fixed blocks 22 are annularly distributed, which is conducive to supporting the overload protection block 3 and increasing the stability thereof.

[0029] Further, the end surface of the fixed block 22 is fixedly connected with a fixed rod 23, and the front end of the fixed rod 23 is fixedly connected with the end of the overload protection device. In use, the fixed rod 23 is arranged according to the number and position of the fixed blocks 22, and also increases the stability of supporting the overload protection block 3.

[0030] Further, the end of the overload protection device is an annular overload protection block 3. In use, the annular overload protection block 3 is adapted to the circular air spring body 1, and has a certain aesthetic appearance.

[0031] Further, the inside of the overload protection block 3 is a hollow structure. In use, the hollow part in the center of the overload protection block 3 can facilitate the extension and contraction of the piston rod 11.

[0032] Further, the diameter of the overload protection block 3 is smaller than that of the top 12. In use, when the top 12 rebounds out of control, the overload protection block 3 can support the top 12, thereby forming overload protection.

[0033] Further, the end surface of the overload protection block 3 is fixedly provided with a rubber gasket 31. In use, the rubber gasket 31 is located on the end surface of the overload protection block 3. When the piston rod 11 is overloaded and out of control, the top 12 rebounds and touches the rubber gasket 31. When the piston rod is overloaded and out of control, the top rebounds and touches the rubber gasket, which can form a certain buffering effect, prevent the overload protection block from being pressed too much due to sudden impact, further protect the overload protection device and the entire air spring structure, and thereby increase the overall practicability.

[0034] Further, the diameter of the rubber gasket 31 is smaller than that of the overload protection block 3, and the thickness of the rubber gasket 31 is not less than 2 cm. In use, the thickness of the rubber gasket 31 is not less than 2 cm, and a too thin rubber gasket 31 cannot form a good protection.

[0035] Working principle: a kind of gas spring with overload protection function of the utility model, in use, first, the nut-shaped connecting piece 2 is rotated and screwed into sleeve 13 from the rear end of gas spring body 1, the inner thread 21 of the inner wall of connecting piece 2 and sleeve 13 is adapted to complete installation, it can also be adjusted by screwing connecting piece 2 its position on sleeve 13, and then change the position of overload protection block 3 to adapt to different working conditions, when the gas spring works normally, the piston rod 11 in the gas spring body 1 freely expands and contracts, the top 12 of its front end moves and supports the support, the hollow structure in the overload protection block 3 provides space for the expansion and contraction of piston rod 11, does not affect the normal work of gas spring, and when the piston rod 11 in the gas spring body 1 is overloaded and out of control, because the distance between the end of overload protection device and the output of gas spring body 1 is less than the distance between the top 12 and the output, and the diameter of the overload protection block 3 is less than the diameter of the top 12, the top 12 will bounce and hit the rubber washer 31 on the end surface of the overload protection block 3, the rubber washer 31 plays a buffering role, then the overload protection block 3 limits the support of the rebounding top 12, prevents it from out of control and hits the cylinder, achieves the purpose of overload protection, thereby enriches the overall function and improves the overall applicability.

Claims

1. A gas spring with overload protection function, comprising a gas spring body (1) provided with an overload protection device, a retractable piston rod (11) is arranged in the gas spring body (1), and a top (12) is fixedly connected to the front end of the piston rod (11), characterized in that, The outer surface of the gas spring body (1) is fixedly sleeved with a sleeve (13) with adjustable function, the outer wall of the sleeve (13) is provided with threads, the overload protection device includes an end portion and a tail portion, the tail portion is threadedly connected with the sleeve (13) and the position of the overload protection is adjusted in a threaded manner, the distance between the end portion and the output port of the gas spring body (1) is smaller than the distance between the top portion (12) and the output port of the gas spring body (1), and the overload protection effect is achieved.

2. The gas spring with overload protection function according to claim 1, characterized in that: The tail portion of the overload protection device is a nut-shaped connecting piece (2), and the inner wall of the connecting piece (2) is provided with internal threads (21) matched with the threads of the sleeve (13).

3. The gas spring with overload protection function according to claim 2, characterized in that: The outer wall of the connecting piece (2) is fixedly connected with a plurality of fixed blocks (22) in a ring shape.

4. The gas spring with overload protection function according to claim 3, characterized in that: The end face of each fixed block (22) is fixedly connected with a fixed rod (23), and the front end of the fixed rod (23) is fixedly connected with the end portion of the overload protection device.

5. The gas spring with overload protection function according to claim 4, characterized in that: The end portion of the overload protection device is a ring-shaped overload protection block (3).

6. The gas spring with overload protection function according to claim 5, characterized in that: The inside of the overload protection block (3) is a hollow structure.

7. The gas spring with overload protection function according to claim 6, characterized in that: The diameter of the overload protection block (3) is smaller than that of the top portion (12).

8. The gas spring with overload protection function according to claim 7, characterized in that: The end face of the overload protection block (3) is fixedly provided with a rubber gasket (31).

9. The gas spring with overload protection function according to claim 8, characterized in that: The diameter of the rubber gasket (31) is smaller than that of the overload protection block (3), and the thickness of the rubber gasket (31) is not less than 2 cm.

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