Fixing device for chair tube welding

Abstract

The utility model provides a fixing device for chair tube welding. The fixing device comprises a supporting frame, a positioning seat, a fixing piece, two clamping arms, a first driving assembly and a second driving assembly. The positioning seat is used for pre-positioning the chair tube, and the fixing piece is used for fixing the chair tube on the positioning seat. The side wall, facing the other clamping arm, of each clamping arm is provided with a first positioning groove, and the two first positioning grooves are arranged in a staggered mode in the vertical direction. The first driving assembly is used for driving the two clamping arms to move close to or away from each other. The second driving assembly is arranged on the supporting frame and used for driving the first driving assembly to do lifting motion so that the clamping arms can stretch into or retreat from the pipe openings of the chair pipes. According to the fixing device for chair tube welding, the chair tube can be positioned and fixed, and the posture of a nut piece can be fixed, so that the nut piece can be conveniently placed at the corresponding position in the chair tube, subsequent welding operation is facilitated, and the welding effect and the welding quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece fixing devices, and particularly relates to a fixing device for chair tube welding. Background Art

[0002] A study chair can provide good support and stability for users, avoiding changing postures due to unstable body. The chair tube is an important support component of the study chair, mainly used for carrying the seat cushion and the backrest. To facilitate subsequent assembly, it is usually necessary to install a nut piece inside the tube opening near the inclined surface of the chair tube. Refer to the attached Figures 1-3 . In the prior art, generally, manual positioning and fixing of the chair tube and the nut piece are carried out. If there is a deviation in the positioning of the chair tube and the nut piece, the welding effect will be poor. Moreover, the manual positioning effect is unstable, and the welding quality is prone to be uneven. In addition, it is not convenient to place the nut piece, and it is not easy to perform the welding operation. Summary of the Utility Model

[0003] Aiming at the defects in the prior art, the purpose of the utility model is to provide a fixing device for chair tube welding, which is convenient to realize the positioning and fixing of the chair tube and the nut piece, and is also convenient to place the nut piece at the corresponding position inside the chair tube, facilitating subsequent welding operations and improving the welding effect and welding quality.

[0004] To achieve the above purpose, the utility model provides a fixing device for chair tube welding, including a support frame; at least one positioning seat arranged on the support frame, the positioning seat is used for pre-positioning the chair tube; a fixing member arranged on the support frame, the fixing member is used for fixing the chair tube on the positioning seat; two spaced clamping arms, a first positioning groove is arranged on the side wall of the clamping arm facing the other clamping arm, and the two first positioning grooves are arranged vertically offset; a first driving component for driving the two clamping arms to move closer to or away from each other; and a second driving component arranged on the support frame, the second driving component is used for driving the first driving component to move up and down, so that the clamping arm extends into or withdraws from the tube opening of the chair tube.

[0005] Preferably, the first driving component includes a first base and two first driving members, the first base is connected with the second driving component, the two first driving members are spaced on the first base, and the movable rod of each first driving member is connected with the corresponding clamping arm.

[0006] Preferably, the first driving assembly further includes a first guiding member and two first sliding members. The first guiding member is disposed on the first base and located between the two first driving members. The two first sliding members are slidably engaged with the first guiding member. A connecting block is provided on the first sliding member, and the connecting block is respectively connected to the clamping arm and the movable rod of the first driving member.

[0007] Preferably, the clamping arm is bent to form a connecting portion, and the connecting portion is connected to the connecting block.

[0008] Preferably, the second driving assembly includes a second driving member. The second driving member is disposed on the support frame, and the movable rod of the second driving member telescopically moves in the vertical direction. The movable rod of the second driving member is connected to the first base.

[0009] Preferably, the second driving assembly further includes a second base, a second guiding member and a second sliding member. The second base is disposed on the support frame. The second guiding member and the second driving member are both disposed on the second base. The second sliding member is slidably engaged with the second guiding member, and the second sliding member is connected to the first base.

[0010] Preferably, a second positioning groove is provided on the positioning seat.

[0011] Preferably, a limiting protrusion is provided on the positioning seat. The limiting protrusion is provided with a limiting surface, and the limiting surface is connected to the groove surface of the second positioning groove.

[0012] Preferably, at least two supporting rods are provided on the support frame and are arranged at intervals. The supporting rods are disposed below the positioning seat and close to the bottom of the support frame.

[0013] Preferably, a bottom plate is provided at the bottom of the support frame, and the bottom plate is located below the supporting rods.

[0014] Advantages of the present utility model:

[0015] A fixing device for chair tube welding disclosed by the present utility model can fix the chair tube by designing a positioning seat and a fixing member on the support frame, effectively avoiding the situation of shaking of the chair tube during the welding process. At the same time, the structural design of the first driving assembly and the two clamping arms facilitates the clamping of the nut piece and the fixation of the posture, and the second driving assembly can enable the two clamping arms to place the nut piece at the corresponding position in the chair tube. The fixing device for chair tube welding can not only position and fix the chair tube, but also fix the posture of the nut piece, so as to facilitate placing the nut piece at the corresponding position in the chair tube, facilitating subsequent welding operations, and improving the welding effect and welding quality. Description of the Drawings

[0016] 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 use in 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 do not necessarily draw according to the actual scale.

[0017] Figure 1 It is a schematic structural diagram of a chair tube;

[0018] Figure 2 It is a schematic structural diagram of a nut piece;

[0019] Figure 3 It is a schematic structural diagram of the nut piece installed in the chair tube;

[0020] Figure 4 It is a schematic structural diagram of a fixing device for chair tube welding provided by an embodiment of the present utility model;

[0021] Figure 5 It is a schematic structural diagram of two clamping arms;

[0022] Figure 6 It is a schematic structural diagram of two clamping arms clamping the nut piece;

[0023] Figure 7 It is a schematic structural diagram of a first driving component and a second driving component;

[0024] Figure 8 It is a schematic sectional view of the clamping arm extending into the pipe orifice of the chair tube;

[0025] Figure 9 It is a schematic structural diagram of a positioning seat;

[0026] Figure 10 It is a top view of the positioning seat;

[0027] Figure 11 It is a top view of the positioning seat cooperating with the chair tube;

[0028] Figure 12 It is a schematic structural diagram of the chair tube installed on the fixing device;

[0029] Reference numerals:

[0030] 10. Support frame; 20. Positioning seat; 21. Second positioning groove; 22. Limiting projection; 221. Limiting surface; 30. Fixing member; 40. Clamping arm; 41. First positioning groove; 42. Connecting portion; 50. First driving assembly; 51. First base; 52. First driving member; 53. First guiding member; 54. First sliding member; 55. Connecting block; 60. Second driving assembly; 61. Second driving member; 62. Second base; 63. Second guiding member; 64. Second sliding member; 70. Supporting rod; 80. Bottom plate. Detailed implementation manners

[0031] The embodiments of the technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present utility model more clearly, and thus are only examples and cannot be used to limit the protection scope of the present utility model.

[0032] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0033] In the description of this application, it should be understood that the orientation or positional relationships indicated by 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. are based on the orientation or positional relationships 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 thus cannot be understood as a limitation of the present utility model.

[0034] 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 indicating the quantity of the indicated technical features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", 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.

[0036] In this application, unless otherwise clearly defined and limited, 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.

[0037] As Figures 4-12 shown, in an embodiment of the present utility model, a fixing device for chair tube welding is provided, which includes a support frame 10, a positioning seat 20, a fixing member 30, two clamping arms 40, a first driving assembly 50 and a second driving assembly 60. The support frame 10 extends vertically, and the two positioning seats 20 are fixedly arranged on the support frame 10 at intervals in the vertical direction. The positioning seat 20 is used for pre-positioning the chair tube. The fixing member 30 is installed on the support frame 10, and the fixing member 30 is used for fixing the chair tube on the positioning seat 20. In this embodiment, the fixing member 30 adopts a quick clamp.

[0038] The two clamping arms 40 are arranged at intervals in the transverse direction. A first positioning groove 41 is provided on the side wall of the clamping arm 40 facing the other clamping arm 40, and the two first positioning grooves 41 are arranged in a vertical dislocation manner. The first driving assembly 50 is used for driving the two clamping arms 40 to move closer to or away from each other. The second driving assembly 60 is arranged on the support frame 10, and the second driving assembly 60 is used for driving the first driving assembly 50 to move up and down, so that the clamping arms 40 can extend into or withdraw from the pipe orifice of the chair tube.

[0039] When using this fixing device, the operator first pre-positions the chair tube on the positioning seat 20, and then fixes the chair tube by using the fixing means. Driven by the first driving assembly 50, the two clamping arms 40 can clamp the nut piece. Since the two first positioning grooves 41 are arranged in a vertical dislocation manner, when the two clamping arms 40 clamp the nut piece, the nut piece is inclined. Driven by the second driving assembly 60, the two clamping arms 40 can send the clamped nut piece to the corresponding position inside the chair tube, so as to facilitate the welding of the nut piece and the chair tube. After the welding is completed, the first driving assembly 50 first drives the two clamping arms 40 to loosen the nut piece, and then the second driving assembly 60 drives the two clamping arms 40 to withdraw from outside the chair tube. Finally, the operator loosens the fixing member 30, and the welded chair tube can be removed from this fixing device.

[0040] A fixing device for chair tube welding disclosed in this embodiment can fix the chair tube by designing a positioning seat 20 and a fixing member 30 on the support frame 10, effectively avoiding the shaking of the chair tube during the welding process. At the same time, the structural design of the first driving assembly 50 and the two clamping arms 40 facilitates the clamping of the nut piece and the fixation of its posture, and the second driving assembly 60 can enable the two clamping arms 40 to place the nut piece at the corresponding position inside the chair tube. This fixing device for chair tube welding can not only position and fix the chair tube, but also fix the posture of the nut piece, thereby facilitating the placement of the nut piece at the corresponding position inside the chair tube, facilitating subsequent welding operations, and improving the welding effect and quality.

[0041] In one embodiment, the first driving assembly 50 includes a first base 51 and two first driving members 52. The first base 51 is connected to the second driving assembly 60. The two first driving members 52 are arranged at intervals on the first base 51. The movable rod of each first driving member 52 is connected to the corresponding clamping arm 40. The two first driving members 52 can drive the two clamping arms 40 to move closer to or away from each other, thereby realizing the clamping or loosening of the nut piece. The structural design of the first driving assembly 50 is simple and compact, and the manufacturing cost is low.

[0042] Furthermore, the first driving assembly 50 further includes a first guiding member 53 and two first sliding members 54. The first guiding member 53 is arranged on the first base 51 and is located between the two first driving members 52. The two first sliding members 54 are slidably engaged with the first guiding member 53. A connecting block 55 is provided on the first sliding member 54. The connecting block 55 is respectively connected to the clamping arm 40 and the movable rod of the first driving member 52. The first guiding member 53 is a slide rail, and the first sliding member 54 is a slider. The length direction of the first guiding member 53 is parallel to the telescopic direction of the movable rod of the first driving member 52. This structural design improves the stability of the movement of the two clamping arms 40. At the same time, the overall structure occupies a small space.

[0043] Even further, in order to facilitate the assembly of the clamping arm 40 and the connecting block 55, the clamping arm 40 is bent to form a connecting portion 42, and the connecting portion 42 is connected to the connecting block 55.

[0044] In one embodiment, the second driving assembly 60 includes a second driving member 61. The second driving member 61 is arranged on the support frame 10. The movable rod of the second driving member 61 telescopically extends in the vertical direction. The movable rod of the second driving member 61 is connected to the first base 51. The second driving member 61 and the first driving member 52 are both one of a cylinder, an oil cylinder, and an electric telescopic rod. The telescopic movement of the movable rod of the second driving member 61 can drive the two clamping arms 40 to extend into the chair tube or withdraw from the chair tube.

[0045] Furthermore, the second driving assembly 60 further includes a second base 62, a second guiding member 63 and a second sliding member 64. The second base 62 is fixed to the top of the support frame 10. The second guiding member 63 and the second driving member 61 are both mounted on the second base 62. The second sliding member 64 is slidably engaged with the second guiding member 63, and the second sliding member 64 is mounted on the first base 51. The second guiding member 63 adopts a linear guide rail, and the second sliding member 64 adopts a linear bearing. By designing the second guiding member 63 and the second sliding member 64, the stability of the first base 51 and the lifting process of the two clamping arms 40 is improved, thereby enhancing the welding effect.

[0046] In one embodiment, the positioning seat 20 is provided with a second positioning groove 21 adapted to the outer contour of the chair tube. By placing the chair tube in the second positioning groove 21, pre-positioning of the chair tube can be achieved. The positioning seat 20 is provided with a limiting protrusion 22, and the limiting protrusion is provided with a limiting surface 221. The limiting surface 221 is connected to the groove surface of the second positioning groove 21. Under the limitation of the limiting protrusion 22, the positioning effect on the chair tube is further improved.

[0047] In one embodiment, the support frame 10 is provided with two spaced-apart supporting rods 70. The supporting rods 70 are arranged below the positioning seat 20 and close to the bottom of the support frame 10. The bottom of the support frame 10 is provided with a bottom plate 80, and the bottom plate 80 is located below the supporting rods 70. Under the action of the supporting rods 70, there is a certain height gap between the bottom of the chair tube and the bottom plate 80, so as to facilitate the discharge of the welding slag in the chair tube.

[0048] In the description of the present invention, a large number of specific details are set forth. However, it can be understood that the embodiments of the present invention 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.

[0049] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention 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 recorded 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 invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. A fixing device for chair tube welding, characterized in that, Comprising: A support frame (10); At least one positioning seat (20), provided on the support frame (10), and the positioning seat (20) is used for pre-positioning the chair tube; A fixing member (30), provided on the support frame (10), and the fixing member (30) is used for fixing the chair tube on the positioning seat (20); Two spaced-apart clamping arms (40), on the side wall of each clamping arm (40) facing the other clamping arm (40) there is a first positioning groove (41), and the two first positioning grooves (41) are arranged in a vertical dislocation; A first driving assembly (50), used for driving the two clamping arms (40) to move closer to or away from each other; And A second driving assembly (60), provided on the support frame (10), and the second driving assembly (60) is used for driving the first driving assembly (50) to move up and down, so that the clamping arms (40) extend into or withdraw from the pipe orifice of the chair tube.

2. The fixing device for chair tube welding according to claim 1, characterized in that, The first driving assembly (50) includes a first base (51) and two first driving members (52), the first base (51) is connected to the second driving assembly (60), the two first driving members (52) are spaced apart on the first base (51), and the movable rod of each first driving member (52) is connected to the corresponding clamping arm (40).

3. The fixing device for chair tube welding according to claim 2, wherein, The first driving assembly (50) further includes a first guiding member (53) and two first sliding members (54), the first guiding member (53) is provided on the first base (51) and is located between the two first driving members (52), the two first sliding members (54) are slidably engaged with the first guiding member (53), on the first sliding member (54) there is a connecting block (55), and the connecting block (55) is respectively connected to the clamping arm (40) and the movable rod of the first driving member (52).

4. The fixing device for chair tube welding according to claim 3, characterized in that, The clamping arm (40) is bent to form a connecting portion (42), and the connecting portion (42) is connected to the connecting block (55).

5. The fixing device for chair tube welding according to any one of claims 2-4, characterized in that The second driving assembly (60) includes a second driving member (61), the second driving member (61) is provided on the support frame (10), the movable rod of the second driving member (61) telescopically moves vertically, and the movable rod of the second driving member (61) is connected to the first base (51).

6. The fixing device for chair tube welding according to claim 5, characterized in that, The second driving assembly (60) further includes a second base (62), a second guiding member (63) and a second sliding member (64), the second base (62) is provided on the support frame (10), the second guiding member (63) and the second driving member (61) are both provided on the second base (62), the second sliding member (64) is slidably engaged with the second guiding member (63), and the second sliding member (64) is connected to the first base (51).

7. The fixing device for chair tube welding according to claim 1, characterized in that, On the positioning seat (20) there is a second positioning groove (21).

8. The fixing device for chair tube welding according to claim 7, characterized in that, On the positioning seat (20) there is a limiting projection (22), the limiting projection is provided with a limiting surface (221), and the limiting surface (221) is connected to the groove surface of the second positioning groove (21).

9. The fixing device for chair tube welding according to claim 1, characterized in that, At least two spaced support rods (70) are provided on the support frame (10), and the support rods (70) are arranged below the positioning seat (20) and close to the bottom of the support frame (10).

10. The fixing device for chair tube welding according to claim 9, characterized in that, A bottom plate (80) is provided at the bottom of the support frame (10), and the bottom plate (80) is located below the support rods (70).

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