A guide sleeve and a gas spring having the guide sleeve

Abstract

The utility model discloses a guide sleeve and a gas spring having the guide sleeve. The guide sleeve has a round through hole along the central axis of the guide sleeve, and the guide sleeve includes a base and a main body placed on the base, and a plurality of guide ribs are evenly arranged on the outside of the main body, and a plurality of oil refueling grooves are formed between the adjacent guide ribs; a plurality of oil storage grooves are arranged around the central axis of the main body on the upper end surface of the base; an anti-slip ring is formed around the guide rib, and the anti-slip ring is arranged on the guide rib, and the anti-slip ring is non-closed; a group of positioning guide plates are arranged between the anti-slip ring and the base, and the positioning guide plates are arranged opposite to the non-closed opening of the anti-slip ring. The positioning guide plate is a plane, which is convenient for identification by automated assembly equipment. Such a design can avoid the position of the positioning guide plate when the outer sleeve is punched, thereby effectively reducing the impact damage to the positioning guide plate, improving the guiding function of the guide sleeve, and improving the lubrication effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas spring production equipment, and in particular relates to a guide sleeve and a gas spring with the guide sleeve. Background Art

[0002] Gas springs mainly play a supporting role and are widely used in automobiles, fitness equipment, textile machinery, printing equipment, office equipment, engineering machinery and other industries. The existing gas springs are mainly composed of an outer sleeve, a core rod and a guide sleeve. Figure 1 As shown, the guide sleeve is installed in the outer sleeve, and the core rod is sleeved in the guide sleeve and can move up and down along the guide sleeve, thereby ensuring the stable operation of the core rod without deviation. Therefore, the guide sleeve is a core component of the gas spring and is particularly important.

[0003] At present, relevant technologies have been disclosed about the guide sleeve. For example, Patent Document 1: Chinese Patent Application No. CN201520155465.4 discloses a new guide sleeve, including a sleeve body, guide ribs are evenly arranged inside the sleeve body, oil storage grooves are formed between the guide ribs, the inner side of the guide ribs is arc-shaped, and the sleeve body is made of polyoxymethylene; Patent Document 2: Chinese Patent Application No. CN201922304044.4 discloses a gas pressure rod, which includes a guide sleeve sleeved on the outer surface of the outer tube, the guide sleeve includes a sleeve body and a plurality of guide ribs axially arranged on the inner wall of the sleeve body, and between two adjacent guide ribs An oil storage tank is formed, and a plurality of ribs separated from each other are axially arranged on the outer wall of the sleeve body, and anti-dropping buckle plates are arranged between the plurality of ribs; Patent document three: For example, Chinese patent application number CN202320317215.0 discloses a guide sleeve, which includes a base and a main body placed on the base, a plurality of guide ribs are evenly arranged on the outside of the main body, and the guide ribs are connected by connecting rings, and an oil filling groove is provided in parallel with the guide ribs, and the guide sleeve is provided with at least one positioning groove along the circumferential direction, and a guide vane is formed on the main body of the guide sleeve; the inclination directions of the guide vanes are inconsistent, and the directions of two adjacent guide vanes are relatively arranged.

[0004] Regarding the guide sleeve disclosed in patent document 3, an inclined guide plate is formed on its body. In order to ensure that the guide sleeve and the core rod are relatively fixed, after the guide sleeve is installed on the outer sleeve, an anti-slip protrusion (obtained by air pressure impact depression) needs to be added to the outer sleeve to jam the guide sleeve. However, through analyzing the structure, the anti-slip protrusion is located between the guide plate and the connecting ring, and the anti-slip effect is the best. However, since the current guide sleeve is randomly matched during installation, when the guide plate is located in the direction of the anti-slip protrusion, the stamping effect can easily cause the guide plate to be pressed down and deformed, or even broken, and it cannot play the role of guiding. Summary of the invention

[0005] 1. Problems to be solved

[0006] In view of the above technical problems, the purpose of the utility model is to provide a guide sleeve and a gas spring with the guide sleeve, so as to reduce the damage of the positioning guide plate by impact and improve the guiding effect of the guide sleeve.

[0007] 2. Technical solution

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] According to the first aspect of the purpose of the utility model, the guide sleeve has a round through hole along the central axis of the guide sleeve, the guide sleeve comprises a base and a body placed on the base, a plurality of guide ribs are evenly arranged on the outside of the body, and a plurality of oiling grooves are formed between the adjacent guide ribs; a plurality of oil storage grooves are arranged on the upper end surface of the base around the central axis of the body;

[0010] An anti-slip ring is formed around the guide rib, the anti-slip ring is arranged on the guide rib, and the anti-slip ring is non-closed; a group of positioning guide plates are arranged between the anti-slip ring and the base, and the positioning guide plates are arranged opposite to the non-closed opening of the anti-slip ring.

[0011] According to any implementation scheme of the first aspect of the purpose of the utility model, the number of a group of positioning guide plates is 2.

[0012] According to any implementation scheme of the first aspect of the purpose of the utility model, the plane where the positioning guide plate is located coincides with the chord length of the corresponding anti-slip ring.

[0013] According to any implementation scheme of the first aspect of the purpose of the utility model, a plurality of guide holes are provided on the positioning guide plate.

[0014] According to any implementation scheme of the first aspect of the present utility model, the flow-conducting hole is in a shape of a circle, a square or a rectangle.

[0015] According to any implementation scheme of the first aspect of the purpose of the utility model, the positioning guide plate is axially connected to the base and the anti-slip ring respectively, one side of the circumference is connected to the guide rib, and a gap is provided between the other side and the guide rib.

[0016] According to any implementation scheme of the first aspect of the purpose of the utility model, the positioning guide plate is integrally formed with the base and the anti-slip ring.

[0017] According to any implementation scheme of the first aspect of the purpose of the utility model, the diameter of the plane where the anti-slip ring is located is smaller than the diameter of the base.

[0018] According to any implementation scheme of the first aspect of the purpose of the utility model, the head of the guide rib is provided with a bevel, and the angle of the bevel is 30-45°.

[0019] Another object of the utility model is to provide a gas spring, comprising: an outer sleeve; an inner sleeve nested in the outer sleeve, wherein the guide sleeve is arranged between the outer sleeve and the inner sleeve.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] (1) The guide sleeve of the utility model has a flat surface, which is convenient for identification by automated assembly equipment. Such a design can avoid the position of the guide plate when the outer sleeve is punched, thereby effectively reducing the damage of the guide plate by impact, improving the guiding function of the guide sleeve, and improving the lubrication effect;

[0023] (2) The guide sleeve of the utility model has a simple structure and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution of the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for the purpose of explanation and are not intended to limit the scope of the utility model. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0025] Figure 1 This is a physical picture of a gas spring product in the prior art;

[0026] Figure 2 This is the actual product picture of the guide sleeve of the utility model

[0027] Figure 3 This is a schematic diagram of the structure of the gas spring of the utility model

[0028] Figure 4 This is a structural front view of a guide sleeve of the utility model;

[0029] Figure 5 for Figure 4 A top view of

[0030] Figure 6 for Figure 4 Bottom view of

[0031] Figure 7 for Figure 4 Section view along line AA;

[0032] Figure 8 This is a structural front view of another guide sleeve of the utility model.

[0033] Description of reference numerals:

[0034] 10. Outer sleeve;

[0035] 20. Inner casing;

[0036] 30. Guide sleeve; 31. Through hole; 32. Base; 33. Main body; 34. Guide rib; 341. Inclined surface; 35. Oil filling groove; 36. Oil storage groove; 37. Anti-slip ring; 371. Non-closed mouth; 38. Positioning guide plate; 381. Diversion hole; 382. Gap. DETAILED DESCRIPTION

[0037] The present disclosure may be more easily understood by reference to the following description in conjunction with the accompanying drawings and examples, all of which constitute a part of the present disclosure. It should be understood that the present disclosure is not limited to the specific products, methods, conditions or parameters described and / or shown herein. Further, the terms used herein are only used for the purpose of describing specific embodiments by way of example and are not intended to be limiting unless otherwise stated.

[0038] It should also be understood that, for the sake of clarity, certain features of the present disclosure may be described herein in the context of separate embodiments, but may also be provided in combination with each other in a single embodiment. That is, unless clearly incompatible or specifically not included, each separate embodiment is considered to be combinable with any other embodiment, and the combination is considered to represent another different embodiment. Conversely, for the sake of simplicity, the various features of the present disclosure described in the context of a single embodiment may also be provided individually or in any sub-combination. Finally, although a particular embodiment may be described as part of a series of steps or part of a more general structure, each step or substructure itself may also be considered to be an independent embodiment.

[0039] Unless otherwise indicated, it should be understood that each individual element in a list and each combination of individual elements in the list will be interpreted as a different embodiment. For example, a list of embodiments represented as "A, B, or C" should be interpreted to include embodiments "A", "B", "C", "A or B", "A or C", "B or C", or "A, B, or C".

[0040] In the present disclosure, the singular forms of the articles "a," "an," and "the" also include the corresponding plural references, and a reference to a specific value includes at least that specific value unless the context clearly indicates otherwise. Thus, for example, a reference to "a substance" is a reference to at least one of that substance and equivalents thereof.

[0041] The terms including ordinal numbers such as "first" and "second" can be used to explain various components or fluids, but these components and fluids are not limited by these terms. Therefore, without departing from the teachings of the present disclosure, these terms are only used to distinguish the component / fluid from another component / fluid.

[0042] When items are described by using the conjunction terms "... and / or...," etc., the description should be understood to include any one of the associated listed items and all combinations of one or more thereof.

[0043] In general, the use of the term "about" indicates an approximate value that may vary depending on the desired properties obtained by the disclosed subject matter, and will be interpreted in a context-dependent manner based on function. Therefore, one of ordinary skill in the art will be able to interpret a certain degree of difference on a case-by-case basis. In some cases, the number of significant figures used when expressing a particular value can be a representative technique for determining the difference allowed by the term "about". In other cases, a gradient in a range of values ​​can be used to determine the range of differences allowed by the term "about". Further, all ranges in this disclosure are inclusive and combinable, and reference to the values ​​stated in the range includes each value within the range.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs; the terms used herein and / or include any and all combinations of one or more related listed items.

[0045] like Figures 2 to 8 The specific structure of the guide sleeve 30 of the present embodiment is shown. The guide sleeve 30 has a round through hole 31 along the central axis of the guide sleeve 30. The inner sleeve 20 can pass through the through hole 31 and is tightly fitted. The inner sleeve 20 can also be called a core rod and can move up and down. The guide sleeve 30 includes a base 32 and a body 33 placed on the base 32. Twelve guide ribs 34 are evenly arranged on the outside of the body 33, and twelve oiling grooves 35 are formed between the adjacent guide ribs 34. An oil storage groove 36 is arranged around the body 33 on the upper end surface of the base 32. For example, the width of the oil storage groove 36 is designed to be 2mm and the depth is 2mm. The above-mentioned guide ribs 34 reduce the friction surface, reduce friction, store lubricating grease, increase lubrication effect, and can maintain lubrication for a long time, so that the gas spring can rise and fall smoothly and softly, improve comfort, and give users a comfortable sitting feeling. It can be widely used in office swivel chairs.

[0046] In some embodiments of the utility model, the base 32 and the body 33 of the guide sleeve 30 can be obtained by integral casting, and the material is made of polyformaldehyde. The guide sleeve 30 made of polyformaldehyde POM has the characteristics of high rigidity, good elasticity, good wear resistance, and meets the use requirements.

[0047] In order to solve the problem in patent document 3, combined with FIG. Figure 4 , Figure 5 and Figure 8 As shown, the utility model forms an anti-slip ring 37 around the guide rib 34, the anti-slip ring 37 is arranged on the guide rib 34, and the anti-slip ring 37 is not closed; Figure 4 The guide rib 34 structure shown in the figure is radiated outward from the center of the body 33, and the guide rib 34 is connected by an anti-slip ring 37, and the anti-slip ring 37 is symmetrically and discontinuously arranged to enhance the strength of the guide rib 34. The width of the anti-slip ring 37 is 3mm, the height is 4.5mm, and the position of the anti-slip ring 37 is 12mm away from the base 32. In addition, the anti-slip ring 37 cooperates with the outer sleeve 10 to play a role in preventing back-pulling.

[0048] A group of positioning guide plates 38 is disposed between the anti-slip ring 37 and the base 32 , and the positioning guide plates 38 are disposed opposite to the non-closed opening 371 of the anti-slip ring 37 .

[0049] In this embodiment, combined with Figure 5 and Figure 7 As shown, the number of a group of positioning guide plates 38 is 2, and the two positioning guide plates 38 are arranged adjacent to each other. Further, as shown in the figure, the plane where the positioning guide plate 38 is located coincides with the chord length of the corresponding anti-slip ring 37, that is, perpendicular to the diameter direction. Preferably, for the convenience of integrated processing, the position of the positioning guide plate 38 coincides with the chord length position of the anti-slip ring 37, and the positioning guide plate 38 is integrally formed with the base 32 and the anti-slip ring 37.

[0050] Through a large number of experimental analyses, the utility model is provided with a positioning guide plate 38. On the one hand, the positioning guide plate 38 is a plane, which is convenient for identification by automated assembly equipment. Such a design can avoid the position of the positioning guide plate 38 when punching the outer sleeve 10, thereby effectively reducing the damage to the positioning guide plate 38 by impact, improving the guiding effect of the guide sleeve 30, and improving the lubrication effect; on the other hand, the positioning guide plate 38 can also play the role of backflow of lubricating oil.

[0051] In view of the guiding function of the positioning guide plate 38, its structure is designed as follows:

[0052] 1) The positioning guide plate 38 is provided with a plurality of flow guide holes 381. Furthermore, the flow guide holes 381 are in the shape of a circle, a square or a rectangle. Figure 8 The figure shows a circle, and flow diversion is achieved through the flow diversion hole 381.

[0053] 2) The positioning guide plate 38 is axially connected to the base 32 and the anti-slip ring 37 respectively, one side of the circumference is connected to the guide rib 34, and a gap 382 is provided between the other side and the guide rib 34, and the flow is guided through the gap 382.

[0054] Combination Figure 5 As shown, the diameter of the plane where the anti-slip ring 37 is located is smaller than the diameter of the base 32. The base 32 can be against the outer sleeve 10, and when the core rod of the inner sleeve 20 moves downward, the guide sleeve 30 is effectively prevented from moving.

[0055] In order to facilitate the matching and installation of the guide sleeve 30 and the outer sleeve 10 , the head of the guide rib 34 is provided with an inclined surface 341 , and the angle of the inclined surface 341 relative to the end surface of the guide rib 34 is 45°.

[0056] like Figure 3 As shown, this embodiment further provides a gas spring, comprising: an outer sleeve 10; an inner sleeve 20 nested in the outer sleeve 10, and the above-mentioned guide sleeve 30 is arranged between the outer sleeve 10 and the inner sleeve 20.

[0057] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A guide sleeve (30), having a round through hole (31) along the central axis of the guide sleeve (30), the guide sleeve (30) comprising a base (32) and a body (33) placed on the base (32), a plurality of guide ribs (34) being evenly arranged on the outside of the body (33), and a plurality of oil filling grooves (35) being formed between adjacent guide ribs (34); a plurality of oil storage grooves (36) being arranged on the upper end surface of the base (32) around the central axis of the body (33); characterized in that: An anti-slip ring (37) is formed around the guide rib (34), the anti-slip ring (37) is arranged on the guide rib (34), and the anti-slip ring (37) is non-closed; a group of positioning guide plates (38) is arranged between the anti-slip ring (37) and the base (32), and the positioning guide plates (38) are arranged opposite to the non-closed opening (371) of the anti-slip ring (37).

2. The guide sleeve (30) according to claim 1, characterized in that: The number of a set of positioning guide plates (38) is 2.

3. The guide sleeve (30) according to claim 1 or 2, characterized in that: The plane where the positioning guide plate (38) is located coincides with the chord length of the corresponding anti-slip ring.

4. The guide sleeve (30) according to claim 3, characterized in that: The positioning guide plate (38) is provided with a plurality of guide holes (381).

5. The guide sleeve (30) according to claim 4, characterized in that: The flow-conducting hole (381) is in the shape of a circle, a square or a rectangle.

6. The guide sleeve (30) according to claim 3, characterized in that: The positioning guide plate (38) is axially connected to the base (32) and the anti-slip ring (37), one side of the circumference is connected to the guide rib (34), and a gap (382) is provided between the other side and the guide rib (34).

7. The guide sleeve (30) according to claim 6, characterized in that: The positioning guide plate (38) is integrally formed with the base (32) and the anti-slip ring (37).

8. The guide sleeve (30) according to claim 7, characterized in that: The diameter of the plane where the anti-slip ring (37) is located is smaller than the diameter of the base (32).

9. The guide sleeve (30) according to claim 8, characterized in that: The head of the guide rib (34) is provided with an inclined surface (341), and the angle of the inclined surface (341) is 30-45°.

10. A gas spring comprising: An outer sleeve (10); an inner sleeve (20) nested in the outer sleeve (10), characterized in that a guide sleeve (30) according to any one of claims 1 to 9 is arranged between the outer sleeve (10) and the inner sleeve (20).

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