An angle connection positioning structure with circumferential indexing and locking

Abstract

This invention relates to a circumferentially indexed and locked angle connection positioning structure, comprising a cylindrical sleeve, with a cylindrical mandrel coaxially inserted inside the sleeve; an indexing locking assembly is provided between the cylindrical mandrel and the circumference of the cylindrical sleeve to facilitate stepped rotation angle adjustment of the cylindrical mandrel around its axis; one outer end of the cylindrical sleeve is a sleeve connecting end for fixed connection to an external connected component; one outer end of the cylindrical mandrel is a mandrel connecting end for fixed connection to another external connected component. By employing a compact structure with the cylindrical sleeve and cylindrical mandrel coaxially nested, the indexing locking assembly is fully integrated into the circumferential gap between the two. Then, the outer end of the cylindrical sleeve is directly fixedly connected to one connected component, and the outer end of the cylindrical mandrel is directly fixedly connected to another connected component. This circumferentially indexed and locked angle connection positioning structure occupies only the connection gap between the two connected components, resulting in a more compact structure, smaller size, and more aesthetically pleasing appearance.

Description

Technical Field

[0001] This invention relates to an angle connection positioning structure with circumferential indexing and locking. Background Technology

[0002] In modern furniture design and manufacturing, angled connection structures are fundamental components for achieving diverse furniture functions and spatial adaptability, and are widely used in various scenarios such as board-to-board connections, board-to-pipe connections, and pipe-to-pipe connections.

[0003] Currently, the most widely used angle connection method in the furniture industry is still the rigid fixed connection structure. This type of structure uses bolts or self-tapping screws to fix two furniture parts to a preset fixed angle. Once installed, the angle between the two connected parts is completely fixed and cannot be adjusted. When users need to change the furniture layout or adjust the angle of the parts according to the usage scenario, they can only do so by disassembling and reassembling or even re-drilling holes, which is extremely cumbersome and severely limits the flexibility and adaptability of the furniture.

[0004] To address the inability of rigid connection structures to adjust angles, the industry has developed various connection structures with angle adjustment capabilities, such as optical axis rotation clamps. While these structures achieve angle adjustment to some extent, they suffer from serious design flaws and are generally bulky and have extremely low space utilization.

[0005] Existing angle adjustment structures almost all adopt a fully external, integral design: the entire adjustment structure is installed as an independent, complete unit between two connected components. The main body thickness of this type of structure is usually much greater than the thickness of the connected components, causing it to not only completely occupy the connection gap between the two components, but also resulting in a significant portion of the main structure protruding into the surrounding space of the connected components. For example, as... Figure 1 The optical axis rotating clamp shown is used to connect two pipe fittings. Its main body protrudes in four directions (front, back, left, and right) to each pipe fitting, forming a noticeable "cubic bulge." This fully external design results in a large volume of angle adjustment structure, low space utilization, and fails to fundamentally eliminate the protruding volume. It severely damages the overall lines and visual unity of the furniture, running counter to the minimalist and simple style pursued in modern furniture design.

[0006] Based on this, in order to solve the above technical problems, this case proposes an angle connection positioning structure with circumferential indexing and locking. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an angle connection positioning structure with circumferential indexing and locking.

[0008] To solve the above-mentioned technical problems, the technical solution of the present invention is: an angle connection positioning structure with circumferential indexing and locking. Includes a cylindrical sleeve, wherein a cylindrical mandrel is coaxially inserted inside the cylindrical sleeve; An indexing locking assembly is provided between the cylindrical mandrel and the periphery of the cylindrical sleeve to facilitate stepped rotation angle adjustment of the cylindrical mandrel around its axis. One of the outer ends of the cylindrical sleeve is a sleeve connecting end, which is used to fix it to an external connected component; One of the outer ends of the cylindrical mandrel is the mandrel connecting end, which is used to fix it to another external connected component.

[0009] Preferably, the indexing locking assembly includes a plurality of circumferentially distributed positioning recesses on the outer periphery of the cylindrical mandrel, and further includes a first positioning pin disposed on the cylindrical sleeve for radial movement, the first positioning pin being used to engage or disengage with any of the positioning recesses.

[0010] Preferably, the positioning recess is shaped as a hole-like pit or a strip-shaped groove.

[0011] Preferably, the first positioning pin is a first set screw threaded onto a cylindrical sleeve, and a positioning protrusion for embedding into any positioning recess is fixedly provided on the end of the first set screw.

[0012] Preferably, the cylindrical mandrel is also a bushing structure, and both the sleeve connecting end and the mandrel connecting end are closed ends, and both are coaxially provided with mounting through holes on the closed ends.

[0013] Preferably, the outer end face of the sleeve connecting end is a plane or an arc surface, and the outer end face of the mandrel connecting end is a plane or an arc surface.

[0014] Preferably, a stepless locking assembly is provided between the cylindrical mandrel and the periphery of the cylindrical sleeve to facilitate stepless adjustment of the rotation angle of the cylindrical mandrel around its axis.

[0015] Preferably, the stepless locking assembly includes an optical axis, which is coaxially fixed on a cylindrical mandrel. The cylindrical sleeve is also provided with a second positioning pin for radial movement, which is used to tighten or loosen the outer periphery of the optical axis.

[0016] Preferably, the second positioning pin is a second set screw threaded onto the cylindrical sleeve, and a positioning protrusion for tightening or loosening the outer periphery of the optical axis is fixedly provided on the end of the second set screw.

[0017] Preferably, there are several first positioning pins distributed circumferentially. Among the several first positioning pins and several positioning recesses, there is exactly one pair of first positioning pins and positioning recesses that are interlocked at each rotation angle of the cylindrical mandrel.

[0018] Compared with the prior art, the present invention has the following advantages: The present invention adopts a compact structure in which a cylindrical sleeve and a cylindrical mandrel are coaxially nested, and the indexing and locking component is completely integrated into the circumferential gap between the two. Then, the outer end of the cylindrical sleeve is directly fixedly connected to one connected component, and the outer end of the cylindrical mandrel is directly fixedly connected to another connected component. The angular connection and positioning structure of the circumferential indexing and locking only occupies the connection gap between the two connected components, and will not produce a phenomenon similar to the "cubic bulge" in the prior art. The present invention has a more compact structure, smaller size, and is more aesthetically pleasing.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the existing technology.

[0021] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0022] Figure 3 This is an exploded view of Embodiment 1 of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0024] Figure 5 This is an exploded view of Embodiment 2 of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0026] Figure 7 This is an exploded view of Embodiment 3 of the present invention.

[0027] Figure 8 This is a schematic diagram of the working state of the indexing and locking component.

[0028] Figure 9 A partial view of a cylindrical mandrel with a groove-shaped recess for positioning.

[0029] Figure 10 This is a schematic diagram of the usage state of Embodiment 1 of the present invention.

[0030] Figure 11 This is an exploded view of the usage state of Embodiment 1 of the present invention.

[0031] Figure 12This is an exploded view of the usage state of Embodiment 2 of the present invention.

[0032] Figure 13 This is an exploded view of the usage state of Embodiment 3 of the present invention.

[0033] Figure 14 This is an exploded view of Embodiment 4 of the present invention.

[0034] In the figure: 1. Cylindrical sleeve; 2. Cylindrical mandrel; 3. Sleeve connecting end; 4. Mandrel connecting end; 5. Positioning recess; 6. First positioning pin; 7. Positioning protrusion; 8. Mounting through hole; 9. Optical axis; 10. Second positioning pin; 11. Flat surface; 12. Arc surface; 13. Screw; 14. Nut; 15. Optical axis rotating fixing clamp; 16. Flat plate; 17. Pipe fitting. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] like Figures 2-14 As shown: This embodiment provides an angle connection positioning structure with circumferential indexing and locking. Includes a cylindrical sleeve 1, and a cylindrical mandrel 2 is coaxially inserted inside the cylindrical sleeve; An indexing locking assembly is provided between the cylindrical mandrel and the periphery of the cylindrical sleeve to facilitate stepped rotation angle adjustment of the cylindrical mandrel around its axis. One of the outer ends of the cylindrical sleeve is the sleeve connecting end 3, which is used to fix it to an external connected component; One of the outer ends of the cylindrical mandrel is the mandrel connecting end 4, which is used to fix it to another external connected component.

[0039] In Embodiment 1 of the present invention, the indexing locking assembly includes a plurality of positioning recesses 5 evenly distributed on the outer periphery of the cylindrical mandrel, and also includes a first positioning pin 6 disposed on the cylindrical sleeve for radial movement, the first positioning pin being used to engage or disengage with any positioning recess.

[0040] In Embodiment 1 of the present invention, the positioning recess is shaped as a hole-like pit or a strip-shaped groove, and the length direction of the groove is parallel to the axial direction.

[0041] In Embodiment 1 of the present invention, the first positioning pin is a first set screw threaded onto a cylindrical sleeve, and a positioning protrusion 7 for embedding into any positioning recess is fixedly provided on the end of the first set screw.

[0042] In Embodiment 1 of the present invention, the cylindrical mandrel is also a bushing structure. Both the sleeve connecting end and the mandrel connecting end are closed ends, and both are coaxially provided with mounting through holes 8 on the closed ends.

[0043] In Embodiment 1 of the present invention, a stepless locking assembly is also provided between the cylindrical mandrel and the periphery of the cylindrical sleeve to facilitate stepless adjustment of the rotation angle of the cylindrical mandrel around its axis.

[0044] In Embodiment 1 of the present invention, the stepless locking assembly includes an optical axis 9, which is coaxially fixed on a cylindrical mandrel. The cylindrical sleeve is also provided with a second positioning pin 10 for radial movement, which is used to tighten or loosen the outer periphery of the optical axis.

[0045] In Embodiment 1 of the present invention, the second positioning pin is a second set screw threaded onto a cylindrical sleeve, and a positioning protrusion for tightening or loosening the outer periphery of the optical axis is fixedly provided on the end of the second set screw.

[0046] like Figures 2-3 As shown, in Embodiment 1 of the present invention, the outer end face of the sleeve connecting end is a plane 11, and the outer end face of the mandrel connecting end is a plane.

[0047] like Figures 4-5 As shown, in Embodiment 2 of the present invention, unlike Embodiment 1, the outer end face of the sleeve connecting end is an arc surface 12, and the outer end face of the mandrel connecting end is a plane.

[0048] like Figures 6-7 As shown, in Embodiment 3 of the present invention, the difference from Embodiment 1 is that the outer end face of the sleeve connecting end is an arc surface, and the outer end face of the mandrel connecting end is an arc surface.

[0049] like Figure 14As shown, in Embodiment 4 of the present invention, the outer end face of the sleeve connecting end is a plane or an arc surface, and the outer end face of the mandrel connecting end is a plane or an arc surface; the shape of the positioning recess is a strip-shaped groove, and the length direction of the groove is parallel to the axial direction; the cylindrical sleeve has one or more sets of first positioning pin adjustment groups distributed along the axial direction, and each first positioning pin adjustment group contains one or more first positioning pins circumferentially distributed on the cylindrical sleeve.

[0050] In a plurality of first positioning pins, the circumferential position (azimuth angle) of each first positioning pin is different, and the adjustment angle that each first positioning pin is responsible for is different. That is, in each rotation angle of the cylindrical mandrel, there is exactly one pair of first positioning pins that are engaged with the positioning recess, which can achieve: When the cross-sectional size of the cylindrical mandrel is limited and it is not possible to have a large number of locating recesses evenly distributed around the circumference to achieve more angle adjustments, multiple first locating pins with different circumferential positions (azimuth angles) distributed axially on the cylindrical sleeve can be appropriately used to achieve more angles and more precise adjustments, depending on actual needs.

[0051] The working principle of this circumferentially indexed locking angle connection positioning structure is as follows: like Figures 10-11 As shown, in Embodiment 1 of the present invention, both connected components are flat plates 16. The mounting through hole between the cylindrical sleeve and the flat plate is locked by screws 13 and nuts 14. The mounting through hole between the cylindrical mandrel and the flat plate is locked by screws and nuts. Then, the cylindrical mandrel is coaxially inserted into the cylindrical sleeve. In stepped adjustment, the second set screw is in a loose state. After rotating the cylindrical mandrel to a preset suitable angle, one of the first set screws is tightened so that it is pushed into one of the positioning recesses. In stepless adjustment, all the first set screws are in a loose state. After rotating the cylindrical mandrel to a preset suitable angle, the second set screw is tightened so that it is pressed against the outer periphery of the optical shaft.

[0052] like Figure 12 As shown, in Embodiment 2 of the present invention, the two connected components are a pipe 17 and a plate. The mounting through hole between the cylindrical sleeve and the pipe is locked with screws and nuts, and the mounting through hole between the cylindrical mandrel and the plate is also locked with screws and nuts. The cylindrical mandrel is then coaxially inserted into the cylindrical sleeve. For stepped adjustment, the second set screw is loosened. After rotating the cylindrical mandrel to a preset suitable angle, one of the first set screws is tightened so that it is pushed into one of the positioning recesses. For stepless adjustment, all the first set screws are loosened. After rotating the cylindrical mandrel to a preset suitable angle, the second set screw is tightened so that it is pressed against the outer periphery of the optical shaft.

[0053] The cylindrical sleeve's arc surface can fit and position itself against the outer periphery of the pipe fitting. The arc surface fits and centers the pipe, preventing slippage and misalignment.

[0054] like Figure 13 As shown, in Embodiment 3 of the present invention, the two connected components are a pipe and a tube. The mounting through hole between the cylindrical sleeve and the pipe is locked with screws and nuts. The mounting through hole between the cylindrical mandrel and the pipe is also locked with screws and nuts. The cylindrical mandrel is then coaxially inserted into the cylindrical sleeve. For stepped adjustment, the second set screw is loosened. After rotating the cylindrical mandrel to a preset suitable angle, one of the first set screws is tightened so that it is pushed into one of the positioning recesses. For stepless adjustment, all the first set screws are loosened. After rotating the cylindrical mandrel to a preset suitable angle, the second set screw is tightened so that it is pressed against the outer periphery of the optical shaft.

[0055] Among them, the arc surfaces of the cylindrical sleeve and the cylindrical mandrel can fit and position themselves against the outer periphery of the pipe fitting. The arc surfaces fit together to center the pipe, preventing slippage and misalignment.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A circumferentially indexed locking angle connection positioning structure, characterized in that: Includes a cylindrical sleeve, wherein a cylindrical mandrel is coaxially inserted inside the cylindrical sleeve; An indexing locking assembly is provided between the cylindrical mandrel and the periphery of the cylindrical sleeve to facilitate stepped rotation angle adjustment of the cylindrical mandrel around its axis. One of the outer ends of the cylindrical sleeve is a sleeve connecting end, which is used to fix it to an external connected component; One of the outer ends of the cylindrical mandrel is the mandrel connecting end, which is used to fix it to another external connected component.

2. The circumferentially indexed locking angle connection positioning structure according to claim 1, characterized in that: The indexing and locking assembly includes several circumferentially distributed positioning recesses on the outer periphery of the cylindrical mandrel, and also includes a first positioning pin disposed on the cylindrical sleeve for radial movement, the first positioning pin being used to engage or disengage with any of the positioning recesses.

3. The angular connection positioning structure with circumferential indexing locking according to claim 2, characterized in that: The positioning recess is shaped as a hole-like pit or a strip-shaped groove.

4. The circumferentially indexed locking angle connection positioning structure according to claim 2, characterized in that: The first positioning pin is a first set screw threaded onto a cylindrical sleeve, and a positioning protrusion for embedding into any positioning recess is fixedly provided on the end of the first set screw.

5. The angular connection positioning structure with circumferential indexing locking according to claim 1, characterized in that: The cylindrical mandrel is also a bushing structure. Both the sleeve connecting end and the mandrel connecting end are closed ends, and both have mounting through holes coaxially opened on the closed ends.

6. The angular connection positioning structure with circumferential indexing locking according to claim 1, characterized in that: The outer end face of the sleeve connecting end is a plane or an arc surface, and the outer end face of the mandrel connecting end is a plane or an arc surface.

7. The angular connection positioning structure with circumferential indexing locking according to claim 1, characterized in that: A stepless locking assembly is also provided between the cylindrical mandrel and the periphery of the cylindrical sleeve to facilitate stepless adjustment of the rotation angle of the cylindrical mandrel around its axis.

8. The angular connection positioning structure with circumferential indexing locking according to claim 7, characterized in that: The stepless locking assembly includes an optical axis, which is coaxially fixed on a cylindrical mandrel. The cylindrical sleeve is also provided with a second positioning pin for radial movement, which is used to tighten or loosen the outer periphery of the optical axis.

9. The angular connection positioning structure with circumferential indexing locking according to claim 8, characterized in that: The second positioning pin is a second set screw threaded onto a cylindrical sleeve, and a positioning protrusion for tightening or loosening the outer periphery of the optical axis is fixedly provided on the end of the second set screw.

10. The angular connection positioning structure with circumferential indexing locking according to claim 2, characterized in that: There are several first positioning pins distributed around the circumference. Among the several first positioning pins and several positioning recesses, there is exactly one pair of first positioning pins and positioning recesses that are interlocked at each rotation angle of the cylindrical mandrel.

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