CN223172301U - Chair tube positioning mechanism - Google Patents

Abstract

The utility model provides a chair tube positioning mechanism which comprises a base, two supporting blocks, two limiting blocks and a pressing mechanism. The two support blocks are arranged on the base in parallel, and the support blocks are provided with bearing grooves for bearing the chair tubes. The first cambered surface of the chair tube is 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 the opening parts of the partial supporting grooves, the limiting blocks can limit the chair tubes in the supporting grooves, and the limiting blocks are attached to the second cambered surfaces of the chair tubes. The pressing mechanism is used for pressing the chair tube into the bearing groove. According to the utility model, the chair tube is positioned and clamped by the cooperation of the supporting block, the limiting block and the pressing mechanism, and then welded, so that the convenience is improved.

Description

Chair tube positioning mechanism

Technical Field

The utility model relates to the technical field of positioning fixtures, in particular to a chair tube positioning mechanism.

Background

The chair tube, namely the chair support tube, is in a slightly flat column shape as a whole, and in the production process, the chair tube needs to be clamped and positioned before being welded.

In practice, the existing positioning device is designed for regular cylindrical chair tubes, is not suitable for clamping, and is inconvenient to use.

Disclosure of utility model

In response to the deficiencies of the prior art, the present utility model provides a chair tube positioning mechanism that solves or at least alleviates one or more of the above-identified problems and other problems of the prior art.

The utility model provides a chair tube positioning mechanism, comprising:

A base;

The two support blocks are arranged on the base in parallel, and a bearing groove for bearing the chair tube is formed in each support block;

Two limiting blocks connected with the corresponding supporting blocks, wherein the limiting blocks cover part of the mouth parts of the bearing grooves and can limit the chair tubes in the bearing grooves, and

And the pressing mechanism is used for pressing the chair tube into the bearing groove.

Preferably, the bottom of the bearing groove and the inner walls of the two sides form an arc surface together, and the bottom of the bearing groove is attached to the outer wall of the chair tube.

Preferably, the pressing mechanism includes:

a pressure arm with one end rotatably connected with the base and the other end rotatable above the support block and kept stationary, and

The pressing component is arranged on the pressing arm, and the end part of the pressing component can be propped against the upper end of the chair tube on the bearing groove;

the rotation center of the pressure arm and the limiting block are positioned on the same side of the bearing groove.

The pressing assembly comprises a pressing rod vertically arranged on the pressing arm, the position of the pressing rod on the pressing arm is vertically adjustable, and the supporting block is vertically and slidably inserted on the base.

Preferably, the pressing assembly further comprises:

A first nut sleeved outside the pressing rod and connected with the pressing rod in a threaded manner, and

The second nut is sleeved outside the pressing rod and is in threaded connection with the pressing rod;

the first nut and the second nut together form a clamp for the pressure arm.

Preferably, the pressing arm is provided with a mounting groove along the length direction of the pressing arm, the pressing rod vertically passes through the mounting groove, and the first nut and the second nut can clamp the pressing arm on the upper side and the lower side of the pressing arm respectively.

Preferably, the pressing assembly further comprises:

a first sliding plate which is propped against the upper end of the pressing arm and is provided with a through hole for the pressing rod to pass through, and

The second sliding plate is propped against the lower end of the pressing arm, and a through hole through which the pressing rod can pass is formed in the second sliding plate;

The two ends of the first sliding plate are bent towards the pressing arm, the first sliding plate is in sliding fit with the pressing arm along the length direction of the pressing arm, the two ends of the second sliding plate are bent towards the pressing arm, the second sliding plate is in sliding fit with the pressing arm along the length direction of the pressing arm, and the first sliding plate and the second sliding plate are simultaneously located between the first nut and the second nut.

Preferably, the base is also provided with a stop lever, the stop lever and the two supporting blocks are positioned on the same gear, and the stop lever is used for propping against the end part of the chair tube.

Preferably, the pressing mechanism further includes:

the lower end of the first connecting rod is rotationally connected with the base, and the upper end of the first connecting rod is rotationally connected with the pressure arm;

a second connecting rod with one end rotatably connected with the upper end of the first connecting rod, and

The lower end of the third connecting rod is rotationally connected with the base, and the upper end of the third connecting rod is rotationally connected with the second connecting rod;

the rotating centers of the second connecting rod and the first connecting rod coincide with the rotating centers of the first connecting rod and the pressing arm, one end, far away from the first connecting rod, of the second connecting rod is connected with a handle, when the pressing arm is in a horizontal state, the first connecting rod is in a vertical state, and the rotating centers of the first connecting rod and the pressing arm, the rotating centers of the third connecting rod and the second connecting rod and the rotating centers of the third connecting rod and the base are in the same straight line.

Compared with the prior art, the utility model has the following beneficial effects:

In the technology of the utility model, the chair tube is positioned and clamped by the cooperation of the supporting block, the limiting block and the pressing mechanism, and then welded, so that the convenience is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a perspective view of a tube positioning mechanism according to an embodiment of the present utility model;

FIG. 2 is a further perspective view of FIG. 1;

FIG. 3 is a further perspective view of FIG. 1;

FIG. 4 is a perspective view of the biasing mechanism of FIG. 1;

fig. 5 is a further perspective view of fig. 4.

Reference numerals:

10. A base, a chair tube and a seat;

20. a supporting block, a 21, a bearing groove;

30. A limiting block;

40. Pressing mechanism, 41, pressing arm, 411, mounting groove, 42, pressing component, 421, pressing rod;

422. First nut 423, second nut 424, first sliding plate 425, second sliding plate;

43. First connecting rod, 44, second connecting rod, 45, third connecting rod, 46, handle;

50. A stop lever.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Referring to fig. 1 to 5, the present embodiment provides a chair tube positioning mechanism, which includes a base 10, two support blocks 20, two stopper blocks 30, and a pressing mechanism 40.

The chair tube 11 is columnar, the cross section of the chair tube 11 is in an 'eye' shape, and the outer wall of the chair tube 11 is provided with a first cambered surface and a second cambered surface.

The two support blocks 20 are arranged on the base 10 in parallel, and the support blocks 20 are provided with a bearing groove 21 for bearing the chair tube 11. The first cambered surface of the chair tube 11 is attached to the bearing grooves 21 of the two supporting blocks 20. The two limiting blocks 30 are connected with the corresponding supporting blocks 20, the limiting blocks 30 cover the opening parts of the partial supporting grooves 21, the limiting blocks 30 can limit the chair tube 11 in the supporting grooves 21, and the limiting blocks 30 are attached to the second cambered surfaces of the chair tube 11. The pressing mechanism 40 is used to press the seat tube 11 against the support groove 21.

In this embodiment, the worker puts the chair tube 11 into the supporting groove 21 from one side of the supporting groove 21 on the supporting block 20, the second arc surface of the chair tube 11 abuts against the limiting block 30, and then the pressing mechanism 40 presses the chair tube 11. On one hand, the setting of the limiting block 30 can play a role in positioning the placement of the chair tube 11, when a worker places the chair tube 11, the chair tube 11 abuts against the limiting block 30 to represent that the chair tube 11 is placed in place, and on the other hand, the limiting block 30 can be matched with the pressing mechanism 40 to fix the chair tube 11. The chair tube 11 is positioned and clamped through the cooperation of the supporting block 20, the limiting block 30 and the pressing mechanism 40, and then welded, so that convenience is improved.

In one embodiment, the bottom of the supporting groove 21 and the inner walls of the two sides form an arc surface together, and the bottom of the supporting groove 21 is attached to the outer wall of the chair tube 11.

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

In one embodiment, the biasing mechanism 40 includes a biasing arm 41 and a biasing assembly 42.

One end of the pressing arm 41 is rotatably connected to the base 10, and the other end of the pressing arm 41 is rotatable above the support block 20 and is held stationary. The pressing component 42 is arranged on the pressing arm 41, and the end part of the pressing component 42 can be propped against the upper end of the chair tube 11 on the bearing groove 21 so as to press the upper end of the chair tube 11. The rotation center of the pressing arm 41 and the stopper 30 are located on the same side of the holding groove 21.

In this embodiment, the worker is located at the opposite side of the pressing arm 41, so that the worker can place the chair tube 11 into the supporting groove 21 more easily, and then the pressing component 42 on the pressing arm 41 presses down and abuts against the chair tube 11 to complete positioning.

In one embodiment, the pressing assembly 42 comprises 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, and the supporting block 20 is vertically slidably inserted on the base 10. Specifically, the lower extreme of supporting shoe 20 is connected with square piece, has seted up square mouth on the base 10 corresponds, and square piece can vertically slide and insert in the square mouth that corresponds to make supporting shoe 20 can change.

In this embodiment, by replacing the supporting block 20 and adjusting the vertical position of the pressing rod 421, the chair tube 11 with various sizes can be adapted.

In one embodiment, the compression assembly 42 further includes a first nut 422 and a second nut 423.

The first nut 422 is sleeved outside the pressing rod 421, and the first nut 422 is in threaded connection with the pressing rod 421. The second nut 423 is sleeved outside the pressing rod 421, and the second nut 423 is in threaded connection with the pressing rod 421. The first nut 422 and the second nut 423 form a clamp together against the pressing arm 41.

In this embodiment, the positions of the first nut 422 and the second nut 423 on the pressing rod 421 are adjusted, so that the position of the pressing rod 421 on the pressing arm 41 is adjustable up and down.

In one embodiment, the pressing arm 41 is provided with a mounting slot 411 along the length direction thereof, the pressing rod 421 vertically passes through the mounting slot 411, and the first nut 422 and the second nut 423 can clamp the pressing arm 41 at the upper and lower sides thereof, respectively.

In this embodiment, the pressing rod 421 is not only vertically adjustable, but also laterally movable in the mounting slot 411, and particularly when the size of the seat tube 11 is enlarged or reduced, the pressing rod 421 needs to be horizontally adjusted in addition to the up-down adjustment, so that the lower end of the pressing rod 421 is aligned with the seat tube 11. It should be noted that, the pressing arm 41 rotates to be close to the seat tube 11, so the pressing rod 421 does not necessarily need to press against the middle portion of the seat tube 11, and the pressing rod 421 presses against the side, far away from the limiting block 30, of the seat tube 11 to cooperate with the limiting block 30 to fix the seat tube 11.

In one embodiment, the compression assembly 42 further includes a first slide plate 424 and a second slide plate 425.

The first sliding plate 424 is abutted against the upper end of the pressing arm 41, and a through hole for the pressing rod 421 to pass through is formed in the first sliding plate 424. The second sliding plate 425 abuts against the lower end of the pressing arm 41, and a through hole through which the pressing rod 421 passes is formed in the second sliding plate 425.

Both ends of the first sliding plate 424 are bent toward the pressing arm 41. The first slide plate 424 is slidably fitted with the pressing arm 41 in the longitudinal direction thereof. Both ends of the second sliding plate 425 are bent toward the pressing arm 41. The second slide plate 425 and the pressing arm 41 are slidably fitted along the length direction thereof. The first sliding plate 424 and the second sliding plate 425 are located between the first nut 422 and the second nut 423 at the same time.

In this embodiment, the pressing rod 421 can slide along the length direction of the pressing arm 41 in the mounting slot 411 under the cooperation of the first and second sliding plates 424 and 425 and the pressing arm 41, and then be fixed by the first and second nuts 422 and 423. The first and second sliding plates 424 and 425 keep the pressing rod 421 stable on the pressing arm 41 against shaking.

In one embodiment, the base 10 is further provided with a stop lever 50, the stop lever 50 and the two supporting blocks 20 are positioned at the same gear, and the stop lever 50 is used for abutting against the end part of the chair tube 11. In particular, the stop lever 50 may be multiple.

In this embodiment, the welding is performed at the end of the seat tube 11, so the other end of the seat tube 11 is limited by using the stop lever 50.

In one embodiment, the biasing mechanism 40 further includes a first link 43, a second link 44, and a third link 45.

The lower end of the first link 43 is rotatably connected to the base 10, and the upper end of the first link 43 is rotatably connected to the pressing arm 41. One end of the second link 44 is rotatably connected to the upper end of the first link 43. The lower end of the third connecting rod 45 is rotationally connected with the base 10, the upper end of the third connecting rod 45 is rotationally connected with the second connecting rod 44, and the third connecting rod 45 and the first connecting rod 43 are both positioned below the second connecting rod 44.

The rotation centers of the second link 44 and the first link 43 coincide with the rotation centers of the first link 43 and the pressing arm 41, one end of the second link 44 away from the first link 43 is connected with a handle 46, when the pressing arm 41 is in a horizontal state, the first link 43 is in a vertical state, and the rotation centers (S1) of the first link 43 and the pressing arm 41, the rotation center (S2) of the third link 45 and the second link 44, and the rotation center (S3) of the third link 45 and the base 10 are in the same straight line.

In this embodiment, the arrangement of the first link 43, the second link 44 and the third link 45 is referred to the prior art, the handle 46 is pressed down to make the upper end of the third link 45 deflect towards the pressing arm 41, the upper end of the first link 43 drives the pressing arm 41 to rotate close to the seat tube 11 until the three rotation centers S1, S2 and S3 are aligned, at this time, the pressing arm 41 is in a horizontal state, and the pressing arm 41 is locked at this point until the handle 46 is lifted to unlock and drive the pressing arm 41 away from the seat tube 11. In addition, other forms of driving in the prior art may be used to achieve the rotation of the arm 41 closer to the seat tube 11.

In the description of the present utility model, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model, but not to limit the technical solution of the present utility model, and although the detailed description of the present utility model is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model, and all the modifications or substitutions are included in the scope of the claims and the specification of the present utility model.

Claims (9)

1. A chair tube positioning mechanism, comprising:

a base (10);

The two support blocks (20) are arranged on the base (10) in parallel, and a bearing groove (21) for bearing the chair tube (11) is formed in the support blocks (20);

Two limiting blocks (30) connected with the corresponding supporting blocks (20), wherein the limiting blocks (30) cover part of the mouth parts of the supporting grooves (21), the limiting blocks (30) can limit the chair tubes (11) in the supporting grooves (21), and

And the pressing mechanism (40) is used for pressing the chair tube (11) into the bearing groove (21).

2. The chair tube positioning mechanism according to claim 1, wherein the bottom of the supporting groove (21) and the inner walls of the two sides form an arc surface together, and the bottom of the supporting groove (21) is attached to the outer wall of the chair tube (11).

3. A seat tube positioning mechanism according to claim 2, wherein said biasing mechanism (40) comprises:

a pressure arm (41) with one end rotatably connected with the base (10) and the other end rotatable above the support block (20) and kept stationary, and

The pressing component (42) is arranged on the pressing arm (41), and the end part of the pressing component can be propped against the upper end of the chair tube (11) on the bearing groove (21);

The rotation center of the pressing arm (41) and the limiting block (30) are positioned on the same side of the bearing groove (21).

4. A seat tube positioning mechanism according to claim 3, wherein the pressing assembly (42) comprises 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, and the supporting block (20) is vertically slidably inserted on the base (10).

5. A seat tube positioning mechanism as claimed in claim 4, wherein said biasing assembly (42) further comprises:

a first nut (422) sleeved outside the pressing rod (421) and connected with the pressing rod (421) in a threaded way, and

The second nut (423) is sleeved outside the pressing rod (421) and is in threaded connection with the pressing rod (421);

The first nut (422) and the second nut (423) form a clamp together with the pressing arm (41).

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

7. A seat tube positioning mechanism as set forth in claim 6, wherein said biasing assembly (42) further comprises:

A first sliding plate (424) which is abutted against the upper end of the pressing arm (41) and is provided with a through hole for the pressing rod (421) to pass through, and

A second sliding plate (425) which is abutted against the lower end of the pressing arm (41) and is provided with a through hole for the pressing rod (421) to pass through;

The two 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 the length direction of the pressing arm, the two ends of the second sliding plate (425) are bent towards the pressing arm (41), the second sliding plate (425) is in sliding fit with the pressing arm (41) along the length direction of the pressing arm, and the first sliding plate (424) and the second sliding plate (425) are simultaneously located between the first nut (422) and the second nut (423).

8. The chair tube positioning mechanism according to claim 7, wherein the base (10) is further provided with a stop lever (50), the stop lever (50) and the two supporting blocks (20) are positioned in the same row, and the stop lever (50) is used for abutting against the end part of the chair tube (11).

9. A seat tube positioning mechanism according to any one of claims 3-8, wherein said biasing mechanism (40) further comprises:

The lower end of the first connecting rod (43) is rotationally connected with the base (10), and the upper end of the first connecting rod is rotationally connected with the pressure arm (41);

a second link (44) having one end rotatably connected to the upper end of the first link (43), and

The lower end of the third connecting rod (45) is rotationally connected with the base (10), and the upper end of the third connecting rod is rotationally connected with the second connecting rod (44);

The second connecting rod (44) and the first connecting rod (43) are overlapped with the first connecting rod (43) and the pressing arm (41), one end of the second connecting rod (44) away from the first connecting rod (43) is connected with a handle (46), when the pressing arm (41) is in a horizontal state, the first connecting rod (43) is in a vertical state, and the first connecting rod (43) and the pressing arm (41) are in the same straight line with the rotation center of the second connecting rod (44), the third connecting rod (45) and the rotation center of the third connecting rod (45) and the base (10).