Chair tube positioning mechanism

Abstract

The utility model provides a chair tube positioning mechanism. The chair tube positioning mechanism comprises a base, two supporting blocks, two limiting blocks and a pressing mechanism, the two supporting blocks are arranged on the base in parallel, and bearing grooves used for bearing the chair pipes are formed in the supporting blocks. And the first cambered surfaces of the chair tubes are attached to the bearing grooves of the two supporting blocks. The two limiting blocks are connected with the corresponding supporting blocks, the limiting blocks cover part of the opening parts of the bearing grooves, the limiting blocks can limit the chair tubes in the bearing grooves, and the limiting blocks are attached to the second arc surfaces of the chair tubes. The pressing and leaning mechanism is used for pressing and leaning the chair tube in the bearing groove. The chair tubes are positioned and clamped through cooperation of the supporting blocks, the limiting blocks and the pressing and leaning mechanisms, then welding is conducted, and convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning jigs, and particularly relates to a seat tube positioning mechanism. Background Art

[0002] The seat tube, that is, the seat support tube, is in a slightly flattened column shape as a whole. During the production process, the seat tube needs to be clamped and positioned before welding.

[0003] It is found in practice that most of the existing positioning devices are designed for regular cylindrical seat tubes, which are not very suitable during clamping and are inconvenient to use. Summary of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides a seat tube positioning mechanism, which can solve or at least alleviate one or more of the above problems and other problems existing in the prior art.

[0005] The utility model provides a seat tube positioning mechanism, comprising:

[0006] A base;

[0007] Two support blocks, which are arranged on the base in parallel, and a support groove for supporting the seat tube is formed on the support block;

[0008] Two limit blocks, which are connected to the corresponding support blocks, and the limit blocks cover part of the mouth of the support groove, and the limit blocks can limit the seat tube in the support groove; and

[0009] A pressing mechanism for pressing the seat tube against the support groove.

[0010] Preferably, the bottom and two inner side walls of the support groove together form an arc surface; the bottom of the support groove fits against the outer wall of the seat tube.

[0011] Preferably, the pressing mechanism comprises:

[0012] A pressing arm, one end of which is rotatably connected to the base, and the other end can rotate above the support block and remain stationary; and

[0013] A pressing component, which is arranged on the pressing arm, and the end of which can abut against the upper end of the seat tube on the support groove;

[0014] The rotation center of the pressing arm and the limit block are located on the same side of the support groove.

[0015] Preferably, the pressing component comprises a pressing rod vertically arranged on the pressing arm; the position of the pressing rod on the pressing arm is vertically adjustable; the support block is vertically slidably inserted into the base.

[0016] Preferably, the pressing component further includes:

[0017] A first nut, sleeved outside the pressing rod and threadedly connected to the pressing rod; and

[0018] A second nut, sleeved outside the pressing rod and threadedly connected to the pressing rod;

[0019] The first nut and the second nut jointly clamp the pressing arm.

[0020] Preferably, an installation groove is formed in the pressing arm along its length direction; the pressing rod vertically passes through the installation groove; the first nut and the second nut can clamp the pressing arm on its upper and lower sides respectively.

[0021] Preferably, the pressing component further includes:

[0022] A first sliding plate, abutted against the upper end of the pressing arm, and having a through hole for the pressing rod to pass through; and

[0023] A second sliding plate, abutted against the lower end of the pressing arm, and having a through hole for the pressing rod to pass through;

[0024] Both ends of the first sliding plate are bent towards the pressing arm; the first sliding plate is slidably matched with the pressing arm along its length direction; both ends of the second sliding plate are bent towards the pressing arm; the second sliding plate is slidably matched with the pressing arm along its length direction; the first sliding plate and the second sliding plate are both located between the first nut and the second nut.

[0025] Preferably, a stop rod is further provided on the base; the stop rod and the two support blocks are in the same row; the stop rod is used to abut against the end of the chair tube.

[0026] Preferably, the pressing mechanism further includes:

[0027] A first connecting rod, its lower end is rotatably connected to the base, and its upper end is rotatably connected to the pressing arm;

[0028] A second connecting rod, one end of which is rotatably connected to the upper end of the first connecting rod; and

[0029] A third connecting rod, its lower end is rotatably connected to the base, and its upper end is rotatably connected to the second connecting rod;

[0030] The rotation center of the second connecting rod and the first connecting rod coincides with the rotation center of the first connecting rod and the pressing arm; a handle is connected to one end of the second connecting rod away from the first connecting rod; when the pressing arm is in a horizontal state, the first connecting rod is in a vertical state, and the rotation center of the first connecting rod and the pressing arm, the rotation center of the third connecting rod and the second connecting rod, and the rotation center of the third connecting rod and the base are on the same straight line.

[0031] Compared with the prior art, the present utility model has the following beneficial effects:

[0032] In the technology of the present utility model, the chair tube is positioned and clamped through the cooperation of the support block, the limit block and the pressing mechanism, and then welded, improving the convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0034] Figure 1 A three-dimensional view of a chair tube positioning mechanism in an embodiment of the present utility model;

[0035] Figure 2 For Figure 1 Another three-dimensional view;

[0036] Figure 3 For Figure 1 Another three-dimensional view;

[0037] Figure 4 For Figure 1 A three-dimensional view of the pressing mechanism in

[0038] Figure 5 For Figure 4 Another three-dimensional view.

[0039] Reference numerals:

[0040] 10. Base; 11. Chair tube;

[0041] 20. Support block; 21. Support groove;

[0042] 30. Limit block;

[0043] 40. Pressing mechanism; 41. Pressing arm; 411. Installation groove; 42. Pressing component; 421. Pressing rod;

[0044] 422, first nut; 423, second nut; 424, first sliding plate; 425, second sliding plate;

[0045] 43, first connecting rod; 44, second connecting rod; 45, third connecting rod; 46, handle;

[0046] 50, shift lever. Detailed implementation manner

[0047] Hereinafter, embodiments of the technical solution of the present utility model will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and therefore are only examples and cannot be used to limit the protection scope of the present utility model.

[0048] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0050] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] See Figures 1 to 5 , this embodiment provides a seat tube positioning mechanism, including a base 10, two support blocks 20, two limit blocks 30 and a pressing mechanism 40.

[0054] The seat tube 11 is columnar, the cross-section of the seat tube 11 is in the shape of "eyes", and the outer wall of the seat tube 11 is a first arc surface and a second arc surface.

[0055] The two support blocks 20 are arranged on the base 10 in parallel. A supporting groove 21 for supporting the seat tube 11 is formed on the support block 20. The first arc surface of the seat tube 11 fits with the supporting grooves 21 of the two support blocks 20. The two limit blocks 30 are connected to the corresponding support blocks 20. The limit blocks 30 cover part of the mouth of the supporting groove 21. The limit blocks 30 can limit the seat tube 11 in the supporting groove 21, and the limit blocks 30 fit with the second arc surface of the seat tube 11. The pressing mechanism 40 is used to press the seat tube 11 into the supporting groove 21.

[0056] In this embodiment, the worker puts the seat tube 11 into the supporting groove 21 from one side of the supporting groove 21 on the support block 20. The second arc surface of the seat tube 11 abuts against the limit block 30, and then the pressing mechanism 40 presses the seat tube 11. On the one hand, the setting of the limit block 30 can play a positioning role in placing the seat tube 11. When the worker places the seat tube 11, the seat tube 11 abutting against the limit block 30 means that the seat tube 11 is placed in place; on the other hand, the limit block 30 can cooperate with the pressing mechanism 40 to fix the seat tube 11. The seat tube 11 is positioned and clamped through the cooperation of the support block 20, the limit block 30 and the pressing mechanism 40, and then welding is carried out, improving the convenience.

[0057] In one embodiment, the bottom and the inner walls on both sides of the supporting groove 21 together form an arc surface; the bottom of the supporting groove 21 fits with the outer wall of the seat tube ll.

[0058] In this embodiment, when the worker places one end of the seat tube 11 into the supporting groove 21, the seat tube 11 can slide along the side wall and the bottom of the supporting groove 21, so as to realize the rapid positioning and clamping of the seat tube 11.

[0059] In one embodiment, the pressing mechanism 40 includes a pressing arm 41 and a pressing component 42.

[0060] One end of the pressing arm 41 is rotatably connected to the base 10, and the other end of the pressing arm 41 can rotate above the support block 20 and remain stationary. The pressing component 42 is arranged on the pressing arm 41, and the end of the pressing component 42 can abut against the upper end of the chair tube 11 in the receiving groove 21 so as to press against the upper end of the chair tube 11. The rotation center of the pressing arm 41 and the limiting block 30 are located on the same side of the receiving groove 21.

[0061] In this embodiment, the worker is located on the opposite side of the pressing arm 41, and can conveniently place the chair tube 11 into the receiving groove 21, and then the pressing component 42 on the pressing arm 41 presses down and abuts against the chair tube 11 to complete the positioning.

[0062] In one embodiment, the pressing component 42 includes a pressing rod 421 vertically arranged on the pressing arm 41; the position of the pressing rod 421 on the pressing arm 41 is vertically adjustable; the support block 20 is slidably inserted into the base 10 in the vertical direction. Specifically, a square block is connected to the lower end of the support block 20, and a square opening is correspondingly formed on the base 10, and the square block can be vertically slidably inserted into the corresponding square opening, so that the support block 20 can be replaced.

[0063] In this embodiment, by replacing the support block 20 and adjusting the vertical position of the pressing rod 421, chair tubes 11 of various sizes can be adapted.

[0064] In one embodiment, the pressing component 42 further includes a first nut 422 and a second nut 423.

[0065] The first nut 422 is sleeved outside the pressing rod 421, and the first nut 422 is threadedly connected to the pressing rod 421. The second nut 423 is sleeved outside the pressing rod 421, and the second nut 423 is threadedly connected to the pressing rod 421. The first nut 422 and the second nut 423 jointly clamp the pressing arm 41.

[0066] In this embodiment, by adjusting the positions of the first nut 422 and the second nut 423 on the pressing rod 421, the position of the pressing rod 421 on the pressing arm 41 can be adjusted up and down.

[0067] In one embodiment, an installation groove 411 is formed on the pressing arm 41 along its length direction; the pressing rod 421 passes through the installation groove 411 vertically; the first nut 422 and the second nut 423 can respectively clamp the pressing arm 41 on the upper and lower sides of the pressing arm 41.

[0068] In this embodiment, the pressing rod 421 can be not only vertically adjusted but also horizontally moved within the installation groove 411. Especially when the size of the chair tube 11 becomes larger or smaller, in addition to vertical adjustment, the pressing rod 421 also needs horizontal adjustment to align the lower end of the pressing rod 421 with the chair tube 11. It should be noted that since the pressing arm 41 rotates close to the chair tube 11, the pressing rod 421 does not necessarily need to press against the middle of the chair tube 11. The pressing rod 421 pressing against the side of the chair tube 11 away from the limiting block 30 can cooperate with the limiting block 30 to fix the chair tube 11.

[0069] In one embodiment, the pressing assembly 42 further includes a first sliding plate 424 and a second sliding plate 425.

[0070] The first sliding plate 424 abuts against the upper end of the pressing arm 41, and a through hole for the pressing rod 421 to pass through is provided on the first sliding plate 424. The second sliding plate 425 abuts against the lower end of the pressing arm 41, and a through hole for the pressing rod 421 to pass through is provided on the second sliding plate 425.

[0071] Both ends of the first sliding plate 424 are bent towards the pressing arm 41. The first sliding plate 424 and the pressing arm 41 are slidably matched along their length directions. Both ends of the second sliding plate 425 are bent towards the pressing arm 41. The second sliding plate 425 and the pressing arm 41 are slidably matched along their length directions. The first sliding plate 424 and the second sliding plate 425 are both located between the first nut 422 and the second nut 423.

[0072] In this embodiment, with the cooperation of the first sliding plate 424 and the second sliding plate 425 and the pressing arm 41, the pressing rod 421 can slide within the installation groove 411 along the length direction of the pressing arm 41, and then be fixed by the first nut 422 and the second nut 423. The first sliding plate 424 and the second sliding plate 425 keep the pressing rod 421 stable on the pressing arm 41 without shaking.

[0073] In one embodiment, a stop rod 50 is further provided on the base 10; the stop rod 50 and the two support blocks 20 are in the same row; the stop rod 50 is used to abut against the end of the chair tube 11. Specifically, there can be multiple stop rods 50.

[0074] In this embodiment, the welding is performed at the end of the chair tube 11, so the other end of the chair tube 11 is limited by the stop rod 50.

[0075] In one embodiment, the pressing mechanism 40 further includes a first connecting rod 43, a second connecting rod 44, and a third connecting rod 45.

[0076] The lower end of the first connecting rod 43 is rotatably connected to the base 10, and the upper end of the first connecting rod 43 is rotatably connected to the pressing arm 41. One end of the second connecting rod 44 is rotatably connected to the upper end of the first connecting rod 43. The lower end of the third connecting rod 45 is rotatably connected to the base 10, and the upper end of the third connecting rod 45 is rotatably connected to the second connecting rod 44; both the third connecting rod 45 and the first connecting rod 43 are located below the second connecting rod 44.

[0077] The rotation center of the second connecting rod 44 and the first connecting rod 43 coincides with the rotation center of the first connecting rod 43 and the pressing arm 41; a handle 46 is connected to the end of the second connecting rod 44 away from the first connecting rod 43; when the pressing arm 41 is in a horizontal state, the first connecting rod 43 is in a vertical state, and the rotation center (S1) of the first connecting rod 43 and the pressing arm 41, the rotation center (S2) of the third connecting rod 45 and the second connecting rod 44, and the rotation center (S3) of the third connecting rod 45 and the base 10 are on the same straight line.

[0078] In this embodiment, the settings of the first connecting rod 43, the second connecting rod 44, and the third connecting rod 45 can refer to the prior art. Press down the handle 46 so that the upper end of the third connecting rod 45 biases towards the pressing arm 41, and the upper end of the first connecting rod 43 drives the pressing arm 41 to rotate closer to the seat tube 11 until the three rotation centers S1, S2, and S3 are in a straight line. At this time, the pressing arm 41 is in a horizontal state, and at the same time, the pressing arm 41 is locked in place until the handle 46 is lifted to release the lock and drive the pressing arm 41 away from the seat tube 11. In addition, other forms in the prior art can also be used to drive the pressing arm 41 to rotate closer to the seat tube 11.

[0079] In the description of the present utility model, a large number of specific details are set forth. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and not to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the specification of the present utility model.

Claims

1. A seat tube positioning mechanism, characterized in that, Comprising: A base (10); Two support blocks (20), arranged in parallel on the base (10), and a support groove (21) for supporting the chair tube (11) is formed on the support block (20); Two limit blocks (30), connected to the corresponding support block (20), the limit block (30) covers part of the mouth of the support groove (21), and the limit block (30) can limit the chair tube (11) in the support groove (21); and A pressing mechanism (40) for pressing the chair tube (11) against the support groove (21).

2. The chair tube positioning mechanism according to claim 1, characterized in that, The bottom and the inner walls on both sides of the support groove (21) together form an arc surface; the bottom of the support groove (21) is attached to the outer wall of the chair tube (11).

3. The chair tube positioning mechanism according to claim 2, characterized in that, The pressing mechanism (40) includes: A pressing arm (41), one end of which is rotatably connected to the base (10), and the other end can rotate above the support block (20) and remain stationary; and A pressing component (42), arranged on the pressing arm (41), and the end thereof can abut against the upper end of the chair tube (11) on the support groove (21); The rotation center of the pressing arm (41) and the limit block (30) are located on the same side of the support groove (21).

4. The chair tube positioning mechanism according to claim 3, characterized in that, The pressing component (42) includes a pressing rod (421) vertically arranged on the pressing arm (41); the position of the pressing rod (421) on the pressing arm (41) is vertically adjustable; the support block (20) is vertically slidably inserted into the base (10).

5. The chair tube positioning mechanism according to claim 4, wherein, The pressing component (42) further includes: A first nut (422), sleeved outside the pressing rod (421) and threadedly connected to the pressing rod (421); and A second nut (423), sleeved outside the pressing rod (421) and threadedly connected to the pressing rod (421); The first nut (422) and the second nut (423) jointly clamp the pressing arm (41).

6. The chair tube positioning mechanism according to claim 5, wherein, An installation groove (411) along the length direction is formed on the pressing arm (41); the pressing rod (421) vertically passes through the installation groove (411); the first nut (422) and the second nut (423) can respectively clamp the pressing arm (41) on the upper and lower sides thereof.

7. The chair tube positioning mechanism according to claim 6, wherein, The pressing component (42) further includes: A first sliding plate (424), abutting against the upper end of the pressing arm (41), and a through hole for the pressing rod (421) to pass through is formed thereon; and A second sliding plate (425), abutting against the lower end of the pressing arm (41), and a through hole for the pressing rod (421) to pass through is formed thereon; Both ends of the first sliding plate (424) are bent towards the pressing arm (41); the first sliding plate (424) is in sliding fit with the pressing arm (41) along its length direction; both ends of the second sliding plate (425) are bent towards the pressing arm (41); the second sliding plate (425) and the pressing arm (41) are in sliding fit along its length direction; the first sliding plate (424) and the second sliding plate (425) are both located between the first nut (422) and the second nut (423).

8. The chair tube positioning mechanism according to claim 7, characterized in that A stop rod (50) is further provided on the base (10); the stop rod (50) and the two support blocks (20) are in the same row; the stop rod (50) is used to abut against the end of the chair tube (11).

9. A seat tube positioning mechanism according to any one of claims 3-8, characterized in that, The pressing mechanism (40) further includes: A first connecting rod (43), the lower end of which is rotatably connected to the base (10), and the upper end of which is rotatably connected to the pressing arm (41); A second connecting rod (44), one end of which is rotatably connected to the upper end of the first connecting rod (43); and A third connecting rod (45), the lower end of which is rotatably connected to the base (10), and the upper end of which is rotatably connected to the second connecting rod (44); The rotation center of the second connecting rod (44) and the first connecting rod (43) coincides with the rotation center of the first connecting rod (43) and the pressing arm (41); a handle (46) is connected to the end of the second connecting rod (44) away from the first connecting rod (43); when the pressing arm (41) is in a horizontal state, the first connecting rod (43) is in a vertical state, and the rotation center of the first connecting rod (43) and the pressing arm (41), the rotation center of the third connecting rod (45) and the second connecting rod (44), and the rotation center of the third connecting rod (45) and the base (10) are on the same straight line.

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