Thrust-adjustable gas spring

Abstract

The utility model discloses a thrust-adjustable gas spring which comprises an outer barrel, an inner barrel and an inner barrel. The cylinder barrel is fixedly connected into an inner cavity of the outer barrel, and the first end of the piston rod is slidably connected to an opening of the cylinder barrel; the first end of the outer piston cylinder is slidably mounted at the opening of the outer cylinder body; the thrust adjusting mechanism comprises an elastic part and a pressurizing part, and when the outer piston cylinder is retracted into the outer cylinder body, the compression stroke of the elastic part can be adjusted by adjusting the length of the pressurizing part, so that the external thrust of the outer piston cylinder is adjusted; when the outer piston cylinder shrinks into the outer cylinder body, the compression stroke of the elastic piece can be adjusted by adjusting the length of the pressurizing piece, and when the elastic piece is in different compression strokes, the pushing force of the elastic piece to the outer piston cylinder is different, namely, the external pushing force of the outer piston cylinder is adjusted; the problem that the thrust of an existing gas spring cannot be adjusted is solved, the thrust can be adjusted according to the use occasion, and the applicability is good.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas spring device technical field especially, it relates to a kind of push force adjustable gas spring. BACKGROUND

[0002] As a kind of can play the support, buffering, brake, height adjustment and angle adjustment etc. Industrial accessories, widely used in fitness equipment, also widely used in the power support of box bed. However, most of the current gas spring does not have push force adjustment function.

[0003] Such as Chinese patent CN218718394U, discloses a kind of gas spring with self-locking, comprising: sleeve, the sleeve open end is equipped with switch groove, the switch groove is equipped with switch, the switch is connected with the switch groove by rotating pin, the switch groove top is equipped with button hole, the switch groove bottom is equipped with locking hole, the sleeve open end inboard is equipped with guide sleeve. The scheme can realize the self-locking of gas spring by switch structure;However, the push force of piston rod cannot be adjusted in the use process of gas spring, leading to in some use occasions, the push force of piston rod pushed into cylinder will be too large or too small, and the applicability is not good. SUMMARY

[0004] The utility model aims at: provide a kind of push force adjustable gas spring, to solve the problem mentioned above.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] The present application provides a kind of push force adjustable gas spring, comprising:

[0007] Outer cylinder body;

[0008] Cylinder barrel and piston rod, the cylinder barrel is fixedly connected to the inner cavity of the outer cylinder body, the first end of the piston rod is slidably connected to the opening of the cylinder barrel;

[0009] Outer piston barrel, first end is slidably installed to the opening of the outer cylinder body, the second end of the piston rod is fixedly connected to the second end inner wall of the outer piston barrel, so that the outer piston barrel can be telescopic sliding along the inner cavity wall of the outer cylinder body;

[0010] Push force adjustment mechanism, including the elastic member and booster arranged in sequence and arranged in the outer cylinder body, when the outer piston barrel is contracted into the outer cylinder body, the compression stroke of the elastic member can be adjusted by adjusting the length of booster, to realize the external push force adjustment of the outer piston barrel.

[0011] In a possible implementation, the elastic member is a spring and is sleeved to the outside of the cylinder barrel, and the pressure booster is a sleeve structure with openings on two sides and is arranged on one side of the elastic member.

[0012] In a possible implementation, an accommodating groove for accommodating the pressure booster is arranged on the inner wall of the first end of the outer piston barrel.

[0013] When the outer piston barrel is retracted into the outer barrel body, the pressure booster can be displaced between the accommodating groove and the outside of the cylinder barrel.

[0014] In a possible implementation, a limiting portion is arranged on the inner wall of the first end of the outer barrel body.

[0015] In a possible implementation, a locking mechanism for positioning and locking the outer piston barrel is arranged on the outer barrel body.

[0016] In a possible implementation, the locking mechanism comprises a base, a locking column, a compression spring, a driving switch and a support seat.

[0017] The base is a hollow structure in communication with the outer barrel body, and the bottom of the base is fixedly connected to the outer barrel body.

[0018] The support seat is fixedly connected to the top opening of the base.

[0019] The locking column penetrates through the support seat and is inserted into the base.

[0020] The driving switch is located on the support seat and is hingedly connected to the top of the locking column.

[0021] The compression spring is sleeved to the outside of the locking column, and the compression spring is arranged between the support seat and the locking column, so that the locking column always has a downward moving tendency.

[0022] A locking groove adapted to the locking column is arranged on the outside of the outer piston barrel, and the bottom of the locking column can be adaptively clamped into the locking groove.

[0023] In a possible implementation, the driving switch has a locking state and an unlocking state for driving the locking column.

[0024] The middle part of the driving switch is rectangular, the bottom is a first contact part, and one side surface is a second contact part.

[0025] When the driving switch is rotated, the first contact part abuts against the top end of the support seat, and the locking column is in the locking state.

[0026] When the driving switch is rotated and the second contact portion abuts against the top end of the support base, the locking column is in an unlocked state.

[0027] In a possible implementation, the driving switch is fixed with a dial plate.

[0028] In a possible implementation, the second end top of the outer piston cylinder is fixed with a driving arm.

[0029] When the outer piston cylinder is contracted into the outer cylinder body, the driving arm can abut against the dial plate, so that the driving switch is rotated from an unlocked state to a locked state.

[0030] In a possible implementation, the pressure booster is composed of at least one collar.

[0031] In summary, due to the adoption of the above technical solutions, the present application has the following beneficial effects:

[0032] In the present application, when the outer piston cylinder is contracted into the outer cylinder body, the length of the pressure booster can be adjusted to adjust the compression stroke of the elastic member, and the elastic member is in different compression strokes, so that the pushing force of the elastic member on the outer piston cylinder is different, that is, the external pushing force of the outer piston cylinder is adjusted, and the condition that the pushing force of the existing gas spring cannot be adjusted is solved, and the pushing force can be adjusted according to the use occasion, so that the applicability is better. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Fig. 1 is a structural schematic view of the outer cylinder body 1 and the outer piston cylinder 4 in an extended state of the present application;

[0034] Figure 2 Fig. 2 is a sectional view of the outer cylinder body 1 and the outer piston cylinder 4 in the extended state of the present application;

[0035] Figure 3 Fig. 3 is an exploded view of the outer cylinder body 1 and the outer piston cylinder 4 in the present application;

[0036] Figure 4 Fig. 4 is a structural schematic view of the outer cylinder body 1 and the outer piston cylinder 4 in a contracted state of the present application;

[0037] Figure 5 Fig. 5 is a sectional view of the outer cylinder body 1 and the outer piston cylinder 4 in the contracted state of the present application.

[0038] Markings in the figure:

[0039] 1, outer cylinder body; 2, cylinder; 3, piston rod; 4, outer piston cylinder;

[0040] 5, pushing force adjusting mechanism; 501, elastic member; 502, pressure booster;

[0041] 6, limit part; 7, containing groove;

[0042] 8, locking mechanism; 801, base; 802, locking column; 803, compression spring; 804, drive switch; 805, support seat; 806, locking groove;

[0043] 8041, first contact part; 8042, second contact part; 8043, toggle plate;

[0044] 9, drive arm; 10, first joint; 11, second joint. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0046] Use Figure 1 A thrust adjustable gas spring is described. Figure 1 The structure schematic diagram of the outer cylinder body 1 and the outer piston cylinder 4 in the extended state of the utility model. The thrust adjustable gas spring can be used in supporting, buffering, braking, height adjustment and angle adjustment and other functions of industrial accessories, especially can be widely used in the assisted support of box bed.

[0047] Use Figure 2 And Figure 3 The overall structure of the thrust adjustable gas spring is described, Figure 2 The sectional view of the outer cylinder body 1 and the outer piston cylinder 4 in the extended state of the utility model. Figure 3 The explosion diagram of the outer cylinder body 1 and the outer piston cylinder 4 in the utility model.

[0048] The thrust adjustable gas spring, comprising an outer cylinder body 1, a cylinder 2, a piston rod 3, an outer piston cylinder 4 and a thrust adjusting mechanism 5, wherein:

[0049] The overall shape of the outer cylinder body 1 is cylindrical, one end is closed, and the other end has an opening, which can be used to accommodate the outer piston cylinder 4.

[0050] The cylinder 2 and the piston rod 3 constitute a gas spring assembly, the cylinder 2 is fixedly connected to the inner cavity of the outer cylinder body 1, and specifically can be arranged at the center of the inner cavity of the outer cylinder body 1 and on the same center line, the first end of the cylinder 2 is fixed on the inner wall of the first end of the outer cylinder body 1, the second end of the cylinder 2 is provided with an opening, and the first end of the piston rod 3 can be slidably connected to the opening of the cylinder 2. That is, the cylinder 2 and the piston rod 3 are installed in cooperation, and the piston rod 3 can perform extension and contraction action in the inside of the cylinder 2.

[0051] The first end of the outer piston cylinder 4 is slidingly installed at the opening of the outer cylinder body 1, and the second end of the piston rod 3 is fixedly connected to the inner wall of the second end of the outer piston cylinder 4, that is, the outer piston cylinder 4 can be fixedly installed to the outside of the piston rod 3. When the piston rod 3 is extended and retracted on the cylinder barrel 2, the outer piston cylinder 4 can be extended and retracted along the inner cavity wall of the outer cylinder body 1.

[0052] The thrust adjusting mechanism 5 comprises an elastic member 501 and a booster 502. The elastic member 501 and the booster 502 are arranged in sequence and arranged in the outer cylinder body 1. The elastic member 501 is a spring and is sleeved to the outside of the cylinder barrel 2, and the booster 502 is a sleeve ring structure with openings on both sides and is arranged on one side of the elastic member 501.

[0053] In the embodiment, through the cooperative installation of the outer cylinder body 1 and the outer piston cylinder 4 and the extension and retraction of the cylinder barrel 2 and the piston rod 3, when the piston rod 3 is extended and retracted, the outer piston cylinder 4 can be retracted in the outer cylinder body 1, and at this time, the elastic member 501 and the booster 502 play a reverse pushing role on the retracted outer piston cylinder 4. Therefore, when the outer piston cylinder 4 is retracted into the outer cylinder body 1, the compression stroke of the elastic member 501 can be adjusted by adjusting the length of the booster 502, and the elastic member 501 is in different compression strokes, and the thrust of the elastic member 501 on the outer piston cylinder 4 is different, that is, the external thrust of the outer piston cylinder 4 is adjusted, and the problem that the thrust of the existing gas spring cannot be adjusted is solved, and the thrust size can be adjusted according to the use occasion, and the applicability is better.

[0054] In some embodiments, as shown in Figure 3 . Figure 3 It is an exploded view schematic diagram of the outer cylinder body 1 and the outer piston cylinder 4 in the utility model. The booster 502 is composed of at least one sleeve ring, Figure 3 two sleeve rings are shown, so that the length of the booster 502 can be adjusted by increasing or decreasing the number of sleeve rings, and the compression stroke of the elastic member 501 can be adjusted, that is, the external thrust of the outer piston cylinder 4 can be controlled.

[0055] In some embodiments, as shown in Figure 2 and Figure 3 . Figure 2 It is a sectional view of the outer cylinder body 1 and the outer piston cylinder 4 in the utility model. Figure 3 It is an exploded view schematic diagram of the outer cylinder body 1 and the outer piston cylinder 4 in the utility model. The mounting structure of the booster 502. The inner wall of the first end of the outer piston cylinder 4 is provided with a containing groove 7 for containing the booster 502, and the side wall of the containing groove 7 can limit the booster 502. The inner wall of the first end of the outer cylinder body 1 is provided with a limiting portion 6 for limiting the elastic member 501, so as to ensure the installation and use of the elastic member 501 and the booster 502.

[0056] In the embodiment, when the booster 502 is located in the inner part of the accommodating groove 7, the upper and lower ends of the booster 502 abut against the upper and lower inner walls of the accommodating groove 7, so that the booster 502 is slidably installed in the accommodating groove 7.

[0057] In addition, since the cylinder barrel 2, the outer piston barrel 4 and the booster 502 are located on the same center line, the outer diameter of the cylinder barrel 2 is smaller than the inner diameter of the booster 502, when the outer piston barrel 4 is retracted into the outer barrel 1, the booster 502 can be displaced between the accommodating groove 7 and the outside of the cylinder barrel 2, and in order to avoid the misalignment of the booster 502 when it is displaced from the accommodating groove 7 to the outside of the cylinder barrel 2, a part of the second end of the cylinder barrel 2 extends into the accommodating groove 7 when the outer piston barrel 4 is in the retracted state, so that the booster 502 can be smoothly displaced from the accommodating groove 7 to the outside of the cylinder barrel 2.

[0058] In some embodiments, as shown in Figure 2 and Figure 5 . Figure 2 is a sectional view of the outer barrel 1 and the outer piston barrel 4 in the extended state of the utility model. Figure 5 is a sectional view of the outer barrel 1 and the outer piston barrel 4 in the retracted state of the utility model. The outer barrel 1 is provided with a locking mechanism 8 for positioning and locking the outer piston barrel 4, which can realize automatic or manual positioning and locking of the outer piston barrel 4. The locking mechanism 8 comprises a base 801, a locking column 802, a compression spring 803, a driving switch 804 and a support seat 805.

[0059] The bottom of the base 801 is fixedly connected to the outer barrel 1. The inside of the base 801 is a hollow structure and is in communication with the inner cavity of the outer barrel 1. The support seat 805 is fixedly connected to the top opening of the base 801. The locking column 802 penetrates through the support seat 805 and is inserted into the base 801. The driving switch 804 is located on the support seat 805 and is hingedly connected to the top of the locking column 802. The compression spring 803 is sleeved on the outside of the locking column 802, and the compression spring 803 is arranged between the support seat 805 and the locking column 802. The bottom end of the locking column 802 has a larger diameter than the middle part, which is used for mounting the compression spring 803 between the support seat 805 and the locking column 802. The compression spring 803 always has a downward moving tendency for the locking column 802.

[0060] Referring to Figure 2 , the outer part of the outer piston barrel 4 is provided with a locking groove 806 matched with the locking column 802. By applying force to the driving switch 804, the locking column 802 can be moved up and down, so that the bottom of the locking column 802 can be matched and connected to the locking groove 806, so that the outer piston barrel 4 can be positioned and locked to the outer barrel 1.

[0061] Regarding the specific structure and function of the drive switch 804: The drive switch 804 has the capability to drive the locking pin 802 to its locked state (e.g., ...). Figure 2 (as shown) and unlock status (as shown) Figure 5 (As shown).

[0062] like Figure 2 and Figure 5 As shown. Figure 2 This is a cross-sectional view of the outer cylinder 1 and the outer piston cylinder 4 of this utility model in their extended states. Figure 5 This is a cross-sectional view of the outer cylinder 1 and outer piston cylinder 4 of this utility model in their retracted state. Specifically, the drive switch 804 has a rectangular shape in the middle, with its length greater than its width. The bottom of the drive switch 804 is the first contact portion 8041, that is, the longer bottom is the first contact portion 8041, and one side of the drive switch 804 is the second contact portion 8042, that is, the second contact portion 8042 is in the width direction.

[0063] like Figure 5 As shown, when the drive switch 804 is rotated and the second contact part 8042 abuts against the top of the support base 805, the drive switch 804 moves the locking pin 802 upward in conjunction with the locking groove 806, and the locking pin 802 is in the unlocked state.

[0064] like Figure 2 As shown, when the drive switch 804 is rotated and the first contact part 8041 abuts against the top of the support base 805, the drive switch 804 moves the locking pin 802 downward and engages in the locking groove 806, and the locking pin 802 is in the locked state.

[0065] In this embodiment, the height of the locking pin 802 can be adjusted by rotating the drive switch 804, thereby allowing the outer piston cylinder 4 to be easily locked or unlocked.

[0066] In some embodiments, such as Figure 5 As shown. Figure 5 This is a cross-sectional view of the outer cylinder 1 and outer piston cylinder 4 of this utility model in their retracted state. A toggle plate 8043 is fixedly connected to the drive switch 804, allowing for convenient force application to the drive switch 804 and facilitating its rotation. A drive arm 9 is fixedly connected to the top of the second end of the outer piston cylinder 4, which abuts against the toggle plate 8043, enabling the drive switch 804 to have an automatic locking function.

[0067] In this embodiment, in the initial state of use, the thrust-adjustable gas spring is manually switched to the unlocked state by adjusting the drive switch 804 (e.g., Figure 5(As shown), the outer piston cylinder 4 can then be driven by force to retract. When the outer piston cylinder 4 retracts into the outer cylinder 1, the drive arm 9 can abut against the actuating plate 8043. The actuating plate 8043 drives the drive switch 804 to rotate, causing the drive switch 804 to rotate from the unlocked state to the locked state.

[0068] like Figure 2 and Figure 5 As shown, after use, because the drive switch 804 is in the locked state, the outer piston cylinder 4, under the action of the cylinder 2 and the piston rod 3, extends continuously along the inner cavity of the outer cylinder 1. When the outer piston cylinder 4 returns to its initial extended state (as shown in the image), Figure 5 As shown, the locking post 802 can be snapped into the locking groove 806, completing the automatic locking and positioning of the outer piston cylinder 4. That is, the cooperation between the drive switch 804 and the toggle plate 8043 can realize automatic locking and positioning.

[0069] In some embodiments, such as Figure 1 As shown. Figure 1 This is a schematic diagram of the outer cylinder 1 and the outer piston cylinder 4 of this utility model in their extended states. A first connector 10 is fixedly connected to the outer end face of the first end of the outer cylinder 1, and a second connector 11 is fixedly connected to the outer end face of the second end of the outer piston cylinder 4, which can be used for the installation and use of gas springs.

[0070] In the description of this utility model, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0071] Furthermore, in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0072] In another aspect, it should be noted that unless specifically stated and limited otherwise, the terms "set in", "mounted", "connected", "linked" should be broadly understood, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A gas spring with adjustable thrust, characterized in that The application relates to a push force adjusting mechanism for an external cylinder, which comprises the following parts: an external cylinder; a cylinder fixedly connected to the inner cavity of the external cylinder; a piston rod with a first end slidingly connected to the opening of the cylinder; an external piston cylinder with a first end slidingly installed to the opening of the external cylinder; a second end of the piston rod fixedly connected to the inner wall of the second end of the external piston cylinder, so that the external piston cylinder can slide along the inner wall of the external cylinder; an elastic member and a booster arranged in the external cylinder; when the external piston cylinder is retracted into the external cylinder, the compression stroke of the elastic member can be adjusted by adjusting the length of the booster, so that the external push force of the external piston cylinder is adjusted. The elastic member is a spring and is sleeved to the outside of the cylinder, and the booster is a sleeve ring structure with openings on both sides and is arranged on one side of the elastic member. A containing groove for containing the booster is formed in the inner wall of the first end of the external piston cylinder. When the external piston cylinder is retracted into the external cylinder, the booster can be displaced between the containing groove and the outside of the cylinder. A limiting part is formed in the inner wall of the first end of the external cylinder.

2. The gas spring with adjustable thrust according to claim 1, characterized in that, A locking mechanism for positioning and locking the external piston cylinder is arranged on the external cylinder.

3. The gas spring with adjustable thrust according to claim 2, characterized in that, The locking mechanism comprises a base, a locking column, a compression spring, a driving switch and a support seat. The base is a hollow structure communicated with the external cylinder, and the bottom of the base is fixedly connected to the external cylinder.

4. The gas spring with adjustable thrust according to claim 3, characterized in that, The support seat is fixedly connected to the top opening of the base.

5. Gas spring with adjustable thrust according to any of claims 1 to 4, characterized in that The locking column penetrates through the support seat and is inserted into the base.

6. The gas spring with adjustable thrust of claim 5, wherein, The driving switch is located on the support seat and is hingedly connected to the top of the locking column. The compression spring is sleeved to the outside of the locking column, and the compression spring is arranged between the support seat and the locking column, so that the locking column always has a downward moving tendency. A locking groove matched with the locking column is arranged on the outside of the external piston cylinder, and the bottom of the locking column can be adaptively clamped into the locking groove. The driving switch has a locking state and an unlocking state for driving the locking column. The middle part of the driving switch is rectangular, the bottom is a first contact part, and one side is a second contact part. When the driving switch is rotated and the first contact part abuts against the top end of the support seat, the locking column is in the locking state. When the driving switch is rotated and the second contact part abuts against the top end of the support seat, the locking column is in the unlocking state.

7. The gas spring with adjustable thrust according to claim 6, characterized in that, A toggle plate is fixedly connected to the driving switch. A driving arm is fixedly connected to the top of the second end of the external piston cylinder. When the external piston cylinder is retracted into the external cylinder, the driving arm can abut against the toggle plate, so that the driving switch is rotated from the unlocking state to the locking state. The booster is composed of at least one sleeve ring.

8. The gas spring with adjustable thrust of claim 7, wherein, ​ 9. The gas spring with adjustable thrust of claim 8, wherein, ​ ​ 10. The gas spring with adjustable thrust according to any of claims 1-4, characterized in that, ​

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