Automatic centering fixture for welding reinforcing bars

Abstract

The utility model relates to a kind of automatic centering clamp of steel bar welding, including U-shaped handle, two fixed rings respectively connected in U-shaped handle both ends and coaxial, rotating ring being equipped in the upper of fixed ring and the centering clamp jaw being equipped between fixed ring and rotating ring;Wherein, the centering clamp jaw includes three claw bodies, which are centrally symmetrically distributed along the axis of fixed ring, and the end of three claw bodies away from each other is rotatably connected on fixed ring;Swing rod is vertically connected on the top of claw body;Rotating ring is provided with strip-shaped swing hole that is slidably matched with swing rod, and rotating ring can drive swing rod swing through strip-shaped swing hole when rotating;Under the action force provided by spring on rotating ring, claw body can be automatically centered and clamped, after steel bar is placed, to realize the centering clamping of steel bar, can adapt to the centering of different steel bars, solve the problem that different diameter steel bars are prone to deviation when welding, affect welding quality, and improve the efficiency of steel bar adjustment.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and specifically refers to an automatic centering clamp for welding steel bars. Background Technology

[0002] In the construction of buildings, electroslag pressure welding is often used to connect vertical steel bars. By using electroslag pressure welding, the lap joints of vertical steel bars are reduced, thereby greatly reducing the amount of steel bars used.

[0003] However, in actual construction, it is common to encounter situations where two types of steel bars with different diameters are joined by electroslag pressure welding. Steel bars with different diameters are prone to eccentricity and misalignment during welding, which affects the quality of the joint. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide an automatic centering fixture for welding steel bars, which solves the problem that the welding quality is easily affected by the misalignment of steel bars of different diameters during welding.

[0005] To achieve the above objectives, this utility model provides an automatic centering clamp for rebar welding, comprising a U-shaped handle, two fixed rings coaxially connected to both ends of the U-shaped handle, a rotating ring positioned above the fixed rings, and centering jaws positioned between the fixed rings and the rotating rings; wherein,

[0006] The centering gripper includes three gripper bodies that are centrally symmetrically distributed along the axis of the fixed ring. The ends of the three gripper bodies that are far apart from each other are rotatably connected to the fixed ring. A swing rod is vertically connected to the top of each gripper body.

[0007] The rotating ring has a strip-shaped swing hole that slides with the swing rod, and the swing rod can swing through the strip-shaped swing hole when the rotating ring rotates.

[0008] A spring is installed inside the swing hole, and the spring supports the swing rod so that it falls into one end of the swing hole, and at this time the distance between the three claws is the smallest at the ends that are closest to each other.

[0009] By adopting this technical solution, the rotating ring can synchronously drive the three claws to rotate and open through the swing hole and the swing rod. At this time, the steel bar to be welded can be inserted. Then, the rotating ring is released, and under the force provided by the spring rebound, it will push the swing rod on the claw, causing the three claws to center and clamp, so as to achieve centering and clamping of the steel bar before welding. It can adapt to the centering of steel bars of different diameters, solve the problem of easy misalignment during welding of steel bars of different diameters, which affects the welding quality, and improve the efficiency of steel bar adjustment.

[0010] Furthermore, each of the three claw bodies has a rotating shaft vertically connected to the bottom of one end that is far apart from the other, and a rotating groove is provided on the top of the corresponding fixing ring.

[0011] The claw body is rotatably connected to the fixed ring via a rotating shaft and a rotating groove.

[0012] By adopting this technical solution, a rotating shaft and a rotating groove are matched to achieve a stable rotational connection of the claw body on the fixed ring.

[0013] Furthermore, the sides of the three claws that are close to each other are curved concave surfaces.

[0014] By adopting this technical solution, the arc-shaped concave surface can adapt to the circular outer wall of the reinforcing bar, thereby improving the fit and stability of the claw body in clamping the reinforcing bar.

[0015] Furthermore, a limit block is detachably connected to the top of the swing rod, which extends through the swing hole.

[0016] By adopting this technical solution, the swing rod and the rotating ring are connected in a limiting manner, preventing the rotating ring from detaching from the top of the claw body and maintaining the structure as a whole.

[0017] Furthermore, the swing hole is configured to be arc-shaped along its length.

[0018] By adopting this technical solution, setting it to an arc shape can improve the smoothness of the sliding cooperation with the swing arm, and can better fit the swing arm's swing range to ensure that the swing arm can be moved to achieve the rotation of the claw body.

[0019] Furthermore, the fixing ring is composed of two first ring bodies, one end of the two first ring bodies is rotatably connected by a first rotating shaft, and the other end of the two first ring bodies is detachably connected by a first connecting pin.

[0020] The rotating ring is composed of two second ring bodies. One end of the two second ring bodies is rotatably connected by a second rotating shaft, and the other end of the two second ring bodies is detachably connected by a second connecting pin.

[0021] The first rotating shaft and the first connecting pin correspond vertically to the second rotating shaft and the second connecting pin, respectively.

[0022] By adopting this technical solution, one side of the fixed ring and the rotating ring can be opened, so that when the reinforcing bar cannot be inserted, it can be inserted into the clamp from the side for centering, adapting to different situations in actual operation and improving the flexibility of the clamp.

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] Under the force provided by the spring on the rotating ring, the claw can automatically perform centering and clamping, so as to achieve centering and clamping of the steel bar after it is placed in. It can adapt to the centering of different steel bars, solve the problem of easy misalignment during welding of steel bars of different diameters, which affects the welding quality, and improve the efficiency of steel bar adjustment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the automatic centering clamp for steel bar welding of this utility model;

[0026] Figure 2 This is a three-dimensional schematic diagram of the fixing ring in the automatic centering clamp for steel bar welding of this utility model;

[0027] Figure 3 This is a three-dimensional schematic diagram of the centering jaws in the automatic centering clamp for rebar welding of this utility model;

[0028] Figure 4 This is a top view schematic diagram of the rotating ring in the automatic centering fixture for steel bar welding of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. U-shaped handle; 2. Fixing ring; 21. First ring body; 22. First rotating shaft; 23. First connecting pin; 3. Centering gripper; 31. Gripper body; 32. Rotating shaft; 33. Swing rod; 4. Rotating ring; 41. Second ring body; 42. Second rotating shaft; 43. Second connecting pin; 44. Swing hole; 45. Spring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Please see the appendix Figure 1 , 3 4. This utility model provides an automatic centering clamp for steel bar welding, including a U-shaped handle 1, two fixed rings 2 connected to both ends of the U-shaped handle 1 and coaxial, a rotating ring 4 disposed above the fixed rings 2, and centering jaws 3 disposed between the fixed rings 2 and the rotating rings 4; wherein, the centering jaws 3 include three jaw bodies 31 centrally symmetrically distributed along the axis of the fixed rings 2, and the ends of the three jaw bodies 31 that are far apart from each other are rotatably connected to the fixed rings 2; a swing rod 33 is vertically connected to the top of the jaw body 31; a strip-shaped swing hole 44 is opened on the rotating ring 4 to slide with the swing rod 33, and when the rotating ring 4 rotates, it can drive the swing rod 33 to swing through the strip-shaped swing hole 44; a spring 45 is provided in the swing hole 44, and the spring 45 supports the swing rod 33 so that it falls into one end of the swing hole 44, and at this time the distance between the ends of the three jaw bodies 31 that are close to each other is the smallest;

[0032] Rotating the rotating ring 4 can synchronously drive the three claw bodies 31 to rotate and open through the swing hole 44 and the swing rod 33. At this time, the steel bar to be welded can be inserted. Then, the rotating ring 4 is released. Under the force provided by the spring 45, the swing rod 33 on the claw body 31 will be pushed, causing the three claw bodies 31 to be centered and clamped, so as to realize the centering and clamping of the steel bar. In this way, two steel bars can be centered and clamped on the fixture at the same time. Since the upper and lower fixed rings 2 are coaxial, the two steel bars will be in a coaxial state after being centered and clamped, thus realizing the centering and clamping of the steel bars before welding. It can adapt to the centering of steel bars of different diameters, solve the problem of easy misalignment during welding of steel bars of different diameters, which affects the welding quality, and improve the efficiency of steel bar adjustment.

[0033] Furthermore, in order to improve the stability of the rotation of the rotating ring 4, a structure connecting to the rotating ring 4 can be added at the position where the U-shaped handle 1 connects to the fixed ring 2. For example, a connecting body that can slide on the rotating ring 4 can be added to ensure the stability of the position of the rotating ring 4 without affecting its rotation.

[0034] Furthermore, in order to prevent the rotating ring 4 from rotating after the rebar is centered and clamped, causing centered failure or instability, a limiting body that can be detached from the rotating ring 4 can be set on the connecting body. For example, a limiting block can be set to connect with the limiting hole opened on the rotating ring 4 after the claw body 31 centers and clamps the rebar, so as to prevent the rotating ring 4 from rotating and thus achieve the purpose of stabilizing the position of the claw body 31.

[0035] Furthermore, when the centering reinforcement is of equal diameter, an auxiliary connecting rod can be set to connect the upper and lower rotating rings 4 simultaneously. In this case, the rotation of the two rotating rings 4 can be controlled simultaneously to open the three claws 31 at the corresponding positions. Correspondingly, the rotation of the two rotating rings 4 can also be controlled simultaneously to clamp the reinforcement at the corresponding positions and improve the centering effect.

[0036] Please see the appendix Figure 3 Each of the three claw bodies 31 has a rotating shaft 32 vertically connected to the bottom of one of its far ends, and a rotating groove is provided on the top of the corresponding fixed ring 2. The claw body 31 is rotatably connected to the fixed ring 2 through the rotating shaft 32 and the rotating groove, so as to achieve a stable rotational connection of the claw body 31 on the fixed ring 2.

[0037] Furthermore, the sides of the three claw bodies 31 that are close to each other are arc-shaped concave surfaces. The arc-shaped concave surfaces can adapt to the circular outer wall of the reinforcing bar, so as to improve the fit and stability of the claw bodies 31 in clamping the reinforcing bar.

[0038] The top of the swing rod 33 extends through the swing hole 44 and is detachably connected to a limit block to achieve a limit connection between the swing rod 33 and the rotating ring 4, preventing the rotating ring 4 from detaching from the top of the claw body 31 and maintaining the structure as a whole.

[0039] Please see the appendix Figure 4 The swing hole 44 is set to be arc-shaped along the length direction, which can improve the smoothness of sliding cooperation with the swing rod 33 and can fit more closely to the swing range of the swing rod 33 to ensure that the swing rod 33 can be moved to realize the rotation of the claw body 31.

[0040] Please see the appendix Figure 2 and 4 The fixed ring 2 is composed of two first ring bodies 21, one end of which is rotatably connected by a first rotating shaft 22, and the other end of which is detachably connected by a first connecting pin 23; the rotating ring 4 is composed of two second ring bodies 41, one end of which is rotatably connected by a second rotating shaft 42, and the other end of which is detachably connected by a second connecting pin 43; the first rotating shaft 22 and the first connecting pin 23 correspond vertically to the second rotating shaft 42 and the second connecting pin 43, respectively;

[0041] The fixed ring 2 and the rotating ring 4 are two detachable parts. Taking the fixed ring 2 as an example, after the first connecting pin 23 at one end of the two first ring bodies 21 is removed, they can be rotated relative to each other to open the fixed ring 2 so that the steel bar can be inserted from the side, which can accommodate the situation where the steel bar cannot be inserted. The rotating ring 4 is the same. The first rotating shaft 22 and the first connecting pin 23 on the fixed ring 2 correspond vertically to the second rotating shaft 42 and the second connecting pin 43 on the rotating ring 4, which is also to accommodate the insertion of the steel bar from the same side.

[0042] Furthermore, to ensure that the connection between the two first ring bodies 21 does not conflict with the rotational connection position between the fixed ring 2 and the claw body 31, the sizes of the two first ring bodies 21 should be different. In order to accommodate the installation of the three centrally symmetrical claw bodies 31, the size ratio of the two first ring bodies 21 is preferably one to two. Similarly, to ensure that the connection between the two second ring bodies 41 does not conflict with the mating position between the rotating ring 4 and the swing rod 33, the sizes of the two second ring bodies 41 should be different. In order to accommodate the positional distribution of the swing rods 33 on the three centrally symmetrical claw bodies 31, the size ratio of the two second ring bodies 41 is preferably one to two.

[0043] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A reinforcing bar welding self-centering fixture, characterized by, It includes a U-shaped handle, two coaxial fixed rings connected to both ends of the U-shaped handle, a rotating ring positioned above the fixed rings, and a centering gripper positioned between the fixed rings and the rotating ring; wherein, The centering gripper includes three gripper bodies that are centrally symmetrically distributed along the axis of the fixed ring. The ends of the three gripper bodies that are far apart from each other are rotatably connected to the fixed ring. A swing rod is vertically connected to the top of each gripper body. The rotating ring has a strip-shaped swing hole that slides with the swing rod, and the swing rod can swing through the strip-shaped swing hole when the rotating ring rotates. A spring is installed inside the swing hole, and the spring supports the swing rod so that it falls into one end of the swing hole, and at this time the distance between the three claws is the smallest at the ends that are closest to each other.

2. The welded rebar automatic centering clamp of claim 1, wherein: The bottom of each of the three claws, which are far apart from each other, is vertically connected to a rotating shaft, and the top of the corresponding fixing ring is provided with a rotating groove; The claw body is rotatably connected to the fixed ring via a rotating shaft and a rotating groove.

3. The welded rebar automatic centering clamp of claim 1, wherein: The sides of the three claws that are close to each other are concave arcs.

4. The automatic centering fixture for steel bar welding according to claim 1, characterized in that: The top of the swing rod extends through the swing hole and is detachably connected to a limit block.

5. The welded rebar automatic centering clamp of claim 1, wherein: The swing hole is set to be arc-shaped along its length.

6. The welded rebar automatic centering clamp of claim 1, wherein: The fixing ring is composed of two first ring bodies. One end of the two first ring bodies is rotatably connected by a first rotating shaft, and the other end of the two first ring bodies is detachably connected by a first connecting pin. The rotating ring is composed of two second ring bodies. One end of the two second ring bodies is rotatably connected by a second rotating shaft, and the other end of the two second ring bodies is detachably connected by a second connecting pin. The first rotating shaft and the first connecting pin correspond vertically to the second rotating shaft and the second connecting pin, respectively.

Images