Anti-rotation carbon fiber circular telescopic sleeve

Abstract

The utility model provides an anti-rotation carbon fiber circular telescopic sleeve, and relates to the technical field of telescopic pipes and the technical field of carbon fiber application. The sleeve comprises N circular hollow pipes which are made of carbon fiber materials, the inner diameters and the outer diameters of the circular hollow pipes are matched in pairs, and the N circular hollow pipes are sequentially connected in a sleeved mode from inside to outside; an axial limiting guide groove is formed in the outer surface of each circular hollow pipe and / or an axial limiting guide strip is arranged on the inner surface of each circular hollow pipe, and the limiting guide grooves are matched with the limiting guide strips; every two adjacent circular hollow pipes are connected through a detachable lock catch. According to the utility model, the limiting guide groove and the limiting guide strip are arranged, the clamping and matching relationship between the limiting guide groove and the limiting guide strip can play a role in preventing rotation, meanwhile, the relative sliding of every two adjacent circular hollow pipes can be guided, and the locking and anti-falling at any position can be realized through the detachable lock catch; the problem that in the prior art, the flexible telescopic distance cannot be considered while the situation that a circular telescopic sleeve is prone to rotating is relieved is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic tubes and the technical field of carbon fiber application, in particular to an anti-rotation carbon fiber circular telescopic sleeve. Background Art

[0002] Carbon fiber is a special fiber composed of carbon elements, which has the characteristics of high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance. Based on this, telescopic sleeves made of carbon fiber materials have been widely used in industry, agriculture, daily life and other fields. Among them, compared with other shapes, circular telescopic sleeves are more favored by manufacturers and users because of their low cost, simple process, simple structure and convenient use. However, there are still limitations. Specifically, the market usually uses a simple lock to lock the circular telescopic sleeve, but due to the shape, even after the lock is locked, it is easy to cause the tube body to rotate when a certain force is reached, which will affect normal use. Although in theory, this problem can be effectively alleviated by changing the shape of the telescopic sleeve, such as replacing the circle with a square; however, the mold cost of other shapes of tubes is higher, the process is more complicated, the production efficiency is lower, and the convenience of use is lower than that of the circular telescopic sleeve, so the feasibility of this method is low.

[0003] Therefore, for the above-mentioned problem of easy rotation, the telescopic sleeve industry mostly adopts a locking structure set on the sleeve to solve it, and the commonly used locking structure is generally: a number of spring buckles and holes are respectively set on two adjacent sections of the tube, and the spring buckles are adapted to the holes, and the spring buckles are locked to the holes at different heights to achieve the adjustment of the telescopic length. For example, the Chinese patent with publication number CN107565465A provides a carbon fiber sleeve, which connects and locks the upper tube body and the lower tube body by setting a cylindrical convex part and a cylindrical concave cover; for another example, the Chinese patent with publication number CN117366069A provides a telescopic sleeve, and a spring buckle that is clamped with the movable outer tube is set on the movable inner tube, and a clamping hole matching the spring buckle is opened on the movable outer tube. However, this locking structure set on the sleeve will make the positional relationship between the two adjacent sections of the tube limited by the established positional relationship between the spring buckle and the hole, that is, it will lead to the inflexible adjustment of the telescopic distance of the sleeve, which will reduce the practicality of the telescopic sleeve. Utility Model Content

[0004] The utility model aims to provide a carbon fiber circular telescopic sleeve that prevents rotation, so as to solve the problem mentioned in the above background technology that the prior art cannot alleviate the problem of the circular telescopic sleeve being prone to rotation while taking into account the flexible telescopic distance.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A carbon fiber circular telescopic sleeve that prevents rotation, comprising N circular hollow tubes made of carbon fiber with inner and outer diameters that match each other, the N circular hollow tubes being sleeved in sequence from the inside to the outside; an axial limiting guide groove is provided on the outer surface of each circular hollow tube and / or an axial limiting guide strip is provided on the inner surface, the limiting guide groove is matched with the limiting guide strip; and every two adjacent circular hollow tubes are connected by a detachable lock.

[0007] In the circular telescopic sleeve provided by the utility model, a limit guide groove and a limit guide strip are provided, and the snap-fitting relationship between the two can achieve the effect of preventing rotation, and can also guide the relative sliding of each two adjacent circular hollow tubes; and, the circular telescopic sleeve can achieve locking and anti-dropping at any position through a detachable lock buckle.

[0008] Furthermore, the N circular hollow tubes are divided into an inner tube, an outer tube and N-2 intermediate tubes, and the inner tube, N-2 intermediate tubes and outer tube are sequentially socketed from the inside to the outside; an axial limit guide groove is provided on the outer surface of the inner tube, an axial limit guide strip is provided on the inner surface of the outer tube, and the N-2 intermediate tubes are both provided with axial limit guide grooves on their outer surfaces and axial limit guide strips on their inner surfaces.

[0009] In the above scheme, only the middle layer tube has both the limiting guide groove and the limiting guide strip, while the innermost layer tube has only the limiting guide groove and the outermost layer tube has only the limiting guide strip, thereby effectively saving production and raw material costs.

[0010] Furthermore, the number of the limiting guide grooves and / or limiting guide strips on each of the circular hollow tubes is ≥1.

[0011] In the above solution, by appropriately increasing the number of the limiting guide grooves and the limiting guide strips, the anti-spinning and guiding effects can be correspondingly improved.

[0012] Furthermore, a grooved wall is compounded on the outer circumferential surface of one end of each of the circular hollow tubes, and an axial limiting guide groove is provided on the grooved wall; a limiting wall or a limiting ring is compounded on the inner circumferential surface of the other end of each of the circular hollow tubes, and an axial limiting guide strip is provided below the limiting wall or the limiting ring, and the thickness of the limiting wall or the limiting ring is greater than the thickness of the limiting guide strip.

[0013] Alternatively, the outer circumferential surface of one end of the intermediate layer tube and the inner layer tube is compounded with a grooved wall with a certain thickness, and the grooved wall is provided with an axial limiting guide groove; the inner circumferential surface of the other end of the intermediate layer tube and the outer layer tube is compounded with a limiting wall or a limiting ring with a certain thickness, and an axial limiting guide strip is provided below the limiting wall or the limiting ring, and the thickness of the limiting wall or the limiting ring is greater than or equal to the thickness of the limiting guide strip.

[0014] In the above scheme, by providing the slotted wall and the limiting wall / limiting ring, when the relative distance between two adjacent circular hollow tubes reaches the maximum, the slotted wall and the limiting wall / limiting ring form a locking relationship, thereby preventing the sleeve from being disengaged. It is necessary to limit the thickness of the limiting wall / limiting ring to be greater than or equal to the thickness of the limiting guide strip, otherwise the slotted wall and the limiting wall / limiting ring will miss each other, that is, the locking relationship cannot be formed.

[0015] Furthermore, the detachable lock includes a lock body in a hollow cylindrical shape, an axial opening is provided on the lock body, an adjustable locking part and a fixed locking part are provided on the lock body, and the fixed locking part is located on one side of the adjustable locking part along the length direction of the opening.

[0016] In the above scheme, an adjustable locking part and a fixed locking part are provided to respectively lock two adjacent circular hollow tubes, and the telescopic distance of the sleeve can be adjusted without disassembling the lock buckle. Specifically, when in use, the fixed locking part is used to lock one of the circular hollow tubes, and the adjustable locking part is used to lock the other circular hollow tube; when the telescopic distance of the sleeve needs to be adjusted, the locking force of the adjustable locking part is first reduced so that the other circular hollow tube locked by it can move, and then the other circular hollow tube is moved to a suitable position, and finally the locking force of the adjustable locking part is increased so that the other circular hollow tube is locked again. Among them, when the fixed locking part locks the circular hollow tube located in the inner layer, it can only be adjusted in the direction of increasing the telescopic distance.

[0017] Furthermore, the adjustable locking part includes two nut seats respectively arranged on the locking body on both sides of the opening, and an adjustable screw with a length direction perpendicular to the opening passes through the two nut seats; a knob is sleeved on the end of the adjustable screw extending out of one of the nut seats, and the end of the adjustable screw extending out of the other nut seat extends into the locking piece, and the locking piece is provided with a threaded through hole matching the adjustable screw; both ends of the locking piece are connected to the cam part of the eccentric handle, and the handle of the eccentric handle is provided with a groove, and the position and shape of the groove are matched with the position and shape of the two nut seats and the knob.

[0018] In the above scheme, the length of the adjustable screw extending into the locking member can be changed by manually adjusting the knob, and the locking force of the adjustable locking part can be adjusted; by opening or closing the eccentric handle, the locking can be controlled, that is, forming a locking state or releasing the locking state.

[0019] Furthermore, the fixed locking part includes two nut seats respectively arranged on the locking body at both sides of the opening, and a fixing screw with a length direction perpendicular to the opening passes through the two nut seats, and the fixing screw is screwed into the nut.

[0020] In the above solution, a locking effect can be achieved by tightening the fixing screw into the nut.

[0021] Furthermore, a slot is provided on the lock body between the adjustable locking part and the fixed locking part.

[0022] In the above solution, by providing the slots, the adjustable locking part and the fixed locking part can be opened independently to a certain extent, thereby facilitating adjustment thereof.

[0023] The beneficial effects achieved by the utility model are:

[0024] Provided is a carbon fiber circular telescopic sleeve that prevents rotation. By providing a matching limit guide groove and a limit guide strip, the problem of the sleeve being easy to rotate can be effectively prevented by means of the card-matching relationship between the two, and the adjustment process of the telescopic distance can also be guided. Compared with the prior art, the utility model does not need to change the shape of the sleeve, and also improves the way of setting a locking structure on the sleeve, which can effectively alleviate the problem of the circular telescopic sleeve being easy to rotate while taking into account the flexible telescopic distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram (stereoscopic) of the overall structure of the sleeve described in Example 1 of the utility model;

[0026] Figure 2 It is a schematic diagram of the overall structure of the sleeve described in Example 1 of the utility model (front view);

[0027] Figure 3 It is a schematic diagram of the socket connection of three circular hollow tubes described in Example 1 of the utility model;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the intermediate layer tube described in Example 1 of the utility model;

[0029] Figure 5 This is a schematic diagram of the disassembly structure of the detachable lock buckle described in Example 1 of the utility model;

[0030] In the figure: 1. Inner tube; 2. Outer tube; 3. Middle tube; 4. Limit guide groove; 5. Limit guide strip; 6. Removable lock; 7. Slotted wall; 8. Limit ring; 9. Lock body; 10. Opening; 11. Nut seat; 12. Adjustable screw; 13. Knob; 14. Gasket; 15. Locking piece; 16. Through hole; 17. Eccentric handle; 18. Groove; 19. Fixed screw; 20. Nut; 21. Slot. DETAILED DESCRIPTION

[0031] To clearly illustrate the solution in the utility model, further description is given below in conjunction with the accompanying drawings:

[0032] Example 1

[0033] This embodiment provides a carbon fiber circular telescopic sleeve that prevents rotation, specifically:

[0034] like Figures 1 to 4 As shown, the sleeve includes three circular hollow tubes made of carbon fiber material with inner and outer diameters that are matched in pairs (it should be particularly noted that, since space needs to be left for the limit guide groove 4 and the limit guide strip 5 described later, the "matching" here does not mean complete fit, but that a socketing relationship can be achieved; other descriptions of "matching" in this article are also understood with reference to this idea, that is, it is sufficient to achieve a basic matching relationship, and no specific restrictions are made on the structure itself), the three circular hollow tubes are divided into an inner layer tube 1, an outer layer tube 2 and an intermediate layer tube 3, and the inner layer tube 1, the intermediate layer tube 3 and the outer layer tube 2 are sequentially socketed from the inside to the outside; an inner layer tube 1 is provided with an axial limit guide groove 4 on its outer surface, an outer layer tube 2 is provided with an axial limit guide strip 5 on its inner surface, and an intermediate layer tube 3 is provided with an axial limit guide groove 4 on its outer surface and an axial limit guide strip 5 on its inner surface; each two adjacent circular hollow tubes are connected by a detachable lock buckle 6.

[0035] In this embodiment, the outer circumference of one end of the intermediate layer tube 3 and the inner layer tube 1 is compounded with a grooved wall 7 with a certain thickness, and the grooved wall 7 is provided with two symmetrically arranged (not shown in the figure) axial limiting guide grooves 4; the inner circumference of the other end of the intermediate layer tube 3 and the outer layer tube 2 is compounded with a limiting ring 8 with a certain thickness, and two symmetrically arranged (not shown in the figure) axial limiting guide strips 5 are provided below the limiting ring 8, and the thickness of the limiting ring 8 is greater than the thickness of the limiting guide strip 5.

[0036] like Figure 5 As shown, the detachable lock 6 includes a lock body 9 in a hollow cylindrical shape, on which an axial opening 10, an adjustable locking part and a fixed locking part are provided, and the fixed locking part is located on one side of the adjustable locking part along the length direction of the opening 10; a groove 21 is provided on the lock body 9 between the adjustable locking part and the fixed locking part.

[0037] The adjustable locking part includes two nut seats 11 respectively arranged on the lock body 9 on both sides of the opening 10, and an adjustable screw 12 with a length direction perpendicular to the opening 10 passes through the two nut seats 11; the adjustable screw 12 extends out of one of the nut seats 11 and is sleeved with a knob 13, and the end extending out of the other nut seat 11 passes through a gasket 14 and then extends into a locking member 15, and the locking member 15 is provided with a threaded through hole 16 adapted to the adjustable screw 12; both ends of the locking member 15 are connected to the cam part of the eccentric handle 17, and the handle end of the eccentric handle 17 is provided with a groove 18, and the position and shape of the groove 18 are adapted to the position and shape of the two nut seats 11 and the knob 13.

[0038] The fixed locking part includes two nut seats 11 respectively arranged on the lock body 9 on both sides of the opening 10 , and a fixing screw 19 with a length direction perpendicular to the opening 10 passes through the two nut seats 11 , and the fixing screw 19 is screwed into the nut 20 .

[0039] When in use, firstly, the three circular hollow tubes are sleeved according to the matching relationship between the inner and outer diameters, and then guided by the snap-fit ​​relationship between the limiting guide groove 4 and the limiting guide strip 5, so as to adjust the telescopic distance of the sleeve according to actual needs; wherein, when the relative distance between two adjacent circular hollow tubes reaches the maximum, the slotted wall 7 will form a snap-fit ​​relationship with the limiting ring 8 to prevent the sleeve from being disengaged. After the telescopic distance is adjusted, the detachable lock buckle 6 is used to lock the position of each circular hollow tube, specifically: the detachable lock buckle 6 is inserted from the end of the sleeve and moved to the position to be locked, and one of the circular hollow tubes is locked with the fixed locking part, and the other circular hollow tube is locked with the adjustable locking part. In addition, when it is necessary to adjust the telescopic distance of the sleeve, the locking force of the adjustable locking part can be reduced first so that the other circular hollow tube locked by it can be movable, and then the other circular hollow tube can be moved to a suitable position, and finally the locking force of the adjustable locking part can be increased so that the other circular hollow tube can be locked again.

[0040] Example 2

[0041] This embodiment also provides a carbon fiber circular telescopic sleeve that prevents rotation. The difference from the embodiment 1 is that: the three circular hollow tubes with inner and outer diameters matching each other have the same structure, and the inner, outer and middle tubes are no longer distinguished in this embodiment; specifically, the three circular hollow tubes are sleeved in sequence from the inside to the outside, and each circular hollow tube is provided with an axial limit guide groove 4 on the outer surface and an axial limit guide strip 5 on the inner surface. In addition, each circular hollow tube is compounded with a slotted wall 7 on the outer circumference of one end, and a limit wall or limit ring 8 on the inner circumference of the other end.

[0042] Since the rest of the structural configuration and working principle are consistent with those of Example 1, they will not be described in detail here.

[0043] It should be noted that the parts not described in detail or expanded in the above scheme are all existing technologies, which do not belong to the improvements made by the present invention on the existing technologies, nor do they belong to the protection scope of the technical scheme of the present invention, so they will not be repeated in this article.

[0044] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A carbon fiber circular telescopic sleeve that prevents rotation, characterized in that: The invention comprises N circular hollow tubes made of carbon fiber with inner and outer diameters matching each other, wherein the N circular hollow tubes are sequentially sleeved from the inside to the outside; an axial limiting guide groove (4) is provided on the outer surface of each circular hollow tube and / or an axial limiting guide strip (5) is provided on the inner surface, wherein the limiting guide groove (4) is matched with the limiting guide strip (5); and each two adjacent circular hollow tubes are connected by a detachable lock buckle (6).

2. The anti-rotation carbon fiber circular telescopic sleeve according to claim 1, characterized in that: The N circular hollow tubes are divided into an inner tube (1), an outer tube (2) and N-2 intermediate tubes (3); the inner tube (1), the N-2 intermediate tubes (3) and the outer tube (2) are sequentially sleeved from the inside to the outside; an axial limit guide groove (4) is provided on the outer surface of the inner tube (1), an axial limit guide strip (5) is provided on the inner surface of the outer tube (2), and the N-2 intermediate tubes (3) are both provided with axial limit guide grooves (4) on their outer surfaces and axial limit guide strips (5) on their inner surfaces.

3. The anti-rotation carbon fiber circular telescopic sleeve according to claim 1 or 2, characterized in that: The number of the limiting guide grooves (4) and / or the limiting guide strips (5) on each of the circular hollow tubes is ≥1.

4. The anti-rotation carbon fiber circular telescopic sleeve according to claim 1, characterized in that: A grooved wall (7) is compounded on the outer circumference of one end of each of the circular hollow tubes, and an axial limiting guide groove (4) is provided on the grooved wall (7); a limiting wall or a limiting ring (8) is compounded on the inner circumference of the other end of each of the circular hollow tubes, and an axial limiting guide strip (5) is provided below the limiting wall or the limiting ring (8), and the thickness of the limiting wall or the limiting ring (8) is greater than or equal to the thickness of the limiting guide strip (5).

5. The anti-rotation carbon fiber circular telescopic sleeve according to claim 2, characterized in that: The outer circumference of one end of the intermediate layer tube (3) and the inner layer tube (1) is compounded with a grooved wall (7) with a certain thickness, and an axial limiting guide groove (4) is provided on the grooved wall (7); the inner circumference of the other end of the intermediate layer tube (3) and the outer layer tube (2) is compounded with a limiting wall or a limiting ring (8) with a certain thickness, and an axial limiting guide strip (5) is provided below the limiting wall or the limiting ring (8), and the thickness of the limiting wall or the limiting ring (8) is greater than the thickness of the limiting guide strip (5).

6. The anti-rotation carbon fiber circular telescopic sleeve according to claim 1 or 2, characterized in that: The detachable lock buckle (6) comprises a lock buckle body (9) in a hollow cylindrical shape, an axial opening (10) is provided on the lock buckle body (9), an adjustable locking part and a fixed locking part are provided on the lock buckle body (9), and the fixed locking part is located on one side of the adjustable locking part along the length direction of the opening (10).

7. The anti-rotation carbon fiber circular telescopic sleeve according to claim 6, characterized in that: The adjustable locking part comprises two nut seats (11) respectively arranged on the locking body (9) at both sides of the opening (10), and an adjustable screw (12) is passed through the two nut seats (11) and its length direction is perpendicular to the opening (10); one end of the adjustable screw (12) extending out of one of the nut seats (11) is sleeved with a knob (13), and one end of the adjustable screw (12) extending out of the other nut seat (11) extends into a locking member (15), and the locking member (15) is provided with a threaded through hole (16) adapted to the adjustable screw (12); both ends of the locking member (15) are connected to the cam part of an eccentric handle (17), and the handle of the eccentric handle (17) is provided with a groove (18), and the position and shape of the groove (18) are adapted to the position and shape of the two nut seats (11) and the knob (13).

8. The anti-rotation carbon fiber circular telescopic sleeve according to claim 6, characterized in that: The fixing locking part comprises two nut seats (11) respectively arranged on the locking body (9) at both sides of the opening (10), and a fixing screw (19) with a length direction perpendicular to the opening (10) passes through the two nut seats (11), and the fixing screw is screwed into the nut (20).

9. The anti-rotation carbon fiber circular telescopic sleeve according to claim 6, characterized in that: A slot (21) is provided on the lock body between the adjustable locking part and the fixed locking part.

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