Reducing device of seam welder

Abstract

The utility model discloses a reducing device of a seam welder, and belongs to the technical field of seam welders. Comprising a front wheel and a reducing structure, and the front wheel comprises an axle tube, a disc, an outer ring, N spokes and N fan-shaped reinforcing plates; the reducing structure comprises a front disc, a rear disc, a driving rod, K connecting rods, N front chain groups, N rear chain groups and N electrode tips; the rear chain group comprises two first chain wheels, two second chain wheels and two rear chains; the two first chain wheels are arranged on the two sides of the outer ends of the spokes. The two second chain wheels are arranged at the inner ends of the rear sides of the two adjacent fan-shaped reinforcing plates correspondingly. The front ends of the two rear chains are respectively connected with the two sides of the outer end of the electrode tip, and the two rear chains respectively wind around the two first chain wheels outwards, then wind around the two second chain wheels inwards and finally are backwards connected with the rear disc; the front chain set comprises a front chain and a third chain wheel, and the third chain wheel is arranged on the disc. The front end of the front chain is connected with the front disc, bypasses the third chain wheel backwards and then is connected with the middle of the inner end of the corresponding electrode tip outwards.

Description

Technical Field

[0001] The utility model belongs to the technical field of seam welding machines, in particular to a diameter reducing device of a seam welding machine. Background Art

[0002] Currently, domestic drainage pipes are primarily reinforced concrete. The production of reinforced concrete pipes primarily involves two steps: fabricating the steel skeleton and forming the concrete product. The steel skeleton can be produced in two ways: manual tying and welding using specialized equipment. Traditional steel skeleton production is time-consuming and inefficient. Conventional roll welding machines can automatically produce steel skeletons. Furthermore, to expand the range of equipment, conventional roll welding machines employ a variable diameter device to produce steel skeletons of varying specifications.

[0003] As disclosed in the patent application number CN200920139779.X, the utility model discloses an automatic variable diameter steel bar skeleton roll welding machine, comprising a front wheel and electrode heads arranged at equal intervals on the circumference of the front wheel, the roll welding machine also includes a track arranged along the radius of the front wheel where the electrode head is located, an operating rod that can move horizontally along the axis of the front wheel, and a driving device for driving the operating rod. The electrode head is slidably installed in the track, and the left and right ends of the operating rod are located on both sides of the front wheel. The upper and lower ends of the electrode head are respectively equipped with an upper chain and a lower chain. The upper chain is connected to the left end of the operating rod through a first reversing device, and the lower chain is connected to the right end of the operating rod through a second reversing device.

[0004] The existing diameter-reducing device of a seam welding machine includes a front wheel and a diameter-reducing structure. The front wheel includes an axle tube arranged in a front-to-back direction, a disc at the front end of the axle tube, an outer ring arranged coaxially outside the disc, and N spokes evenly distributed between the outer ring and the disc. The spokes are provided with chutes along their directions. The diameter-reducing structure includes a front disc directly in front of the disc, a rear disc directly behind the disc, a drive rod at the front end of the axle tube that can move back and forth, K connecting rods between the front and rear discs, N groups of front chains, N groups of rear chains, and N electrode heads. The connecting rods are slidably mounted on the disc, and the N electrode heads are respectively slidably mounted in N chutes. The rear disc is slidably mounted on the axle tube. The electrode heads, front chain groups, and rear chain groups are arranged in a one-to-one correspondence, and the electrode heads are connected to corresponding reinforcing tubes. The rear chain assembly includes a first sprocket, a second sprocket, and a rear chain; the first sprocket is located at the outer end of the corresponding spoke; the second sprocket is located in the middle of the spoke and directly behind the edge of the rear disc; the front end of the rear chain is connected to the outer end of the electrode head, it passes around the first sprocket outward, then passes around the second sprocket inward, and finally connects rearward to the rear disc. The front chain assembly includes a front chain and a third sprocket, which is located on the disc; the front end of the front chain is connected to the front disc, passes around the third sprocket rearward, and then connects outward to the middle of the inner end of the corresponding electrode head.

[0005] When the applicant used the aforementioned reducing device, he found the following problems:

[0006] (1) When the electrode head moves inward and outward, the reinforcing tube needs to be deformed at the same time. This causes the force of the electrode head to move to be very large, which makes the spokes easily deformed, thus affecting the diameter change.

[0007] (2) The electrode head is pulled inward and outward by the cooperation of the rear chain and the front chain. When the forces of the rear chain and the front chain are not in the same line, the electrode head is prone to twisting, which can easily cause the spokes to deform and affect the diameter change. Utility Model Content

[0008] To address the aforementioned issues, the present invention provides a diameter-reducing device for a seam welder. This device reinforces the spokes with fan-shaped reinforcement plates, increasing their strength. Two rear chains pull the outer ends of the electrode head, while a front chain pulls the inner middle of the electrode head, forming a stable triangular structure that prevents twisting of the electrode head and deformation of the spokes. The technical solution is as follows:

[0009] The embodiment of the utility model provides a diameter-changing device of a seam welding machine, which includes a front wheel and a diameter-changing structure, wherein the front wheel includes an axle tube 1 arranged in a front-to-back direction, a disc 2 at the front end of the axle tube 1, an outer ring 3 coaxially arranged outside the disc 2, and N spokes 4 evenly distributed between the outer ring 3 and the disc 2, and the spokes 4 are provided with slide grooves 5 along the direction in which they are located; the diameter-changing structure includes a front disc 6 directly in front of the disc 2, a rear disc 7 directly behind the disc 2, a driving rod 8 at the front end of the axle tube 1 and capable of moving back and forth, K connecting rods 9 between the front disc 6 and the rear disc 7, N groups of front chain groups, N groups of rear chain groups and N electrode heads 10, the connecting rod 9 is slidably arranged on the disc 2, the N electrode heads 10 are respectively slidably arranged in the N slide grooves 5, the rear disc 7 is slidably arranged on the axle tube 1, and the electrode heads 10, the front chain group and the rear chain group are arranged in a one-to-one correspondence; the front wheel also includes a fan-shaped disc 6 between the middle parts of two adjacent spokes 4 Reinforcement plate 11; the rear chain group includes two first sprockets 13, two second sprockets 14 and two rear chains 12 arranged side by side; the two first sprockets 13 are respectively arranged on both sides of the outer ends of the corresponding spokes 4 and are both located between the outer ring 3 and the fan-shaped reinforcement plate 11; the two second sprockets 14 are respectively arranged at the rear inner ends of the two adjacent fan-shaped reinforcement plates 11, and the two second sprockets 14 on the same fan-shaped reinforcement plate 11 are arranged side by side; the front ends of the two rear chains 12 are respectively connected to the two sides of the outer end of the electrode head 10, which bypass the two first sprockets 13 outwards, then bypass the two second sprockets 14 inwards, and finally connect to the rear disc 7 backwards; the front chain group includes a front chain 15 and a third sprocket 16, and the third sprocket 16 is arranged on the disc 2; the front end of the front chain 15 is connected to the front disc 6, bypasses the third sprocket 16 backwards, and then connects outwards to the middle of the inner end of the corresponding electrode head 10.

[0010] Among them, the K connecting rods 9 in the embodiment of the present invention are evenly distributed around the shaft tube 1 and form a cage structure with the front disc 6 and the rear disc 7.

[0011] Specifically, the N groups of front chain groups in the embodiment of the present invention are evenly distributed around the axle tube 1, and the N groups of rear chain groups are evenly distributed around the axle tube 1. The disc 2, front disc 6 and rear disc 7 are all coaxially arranged with the axle tube 1. The connecting rod 9 is arranged in the front-to-back direction. The rear end of the rear chain 12 is fixed on the outer edge of the rear disc 7. N third sprockets 16 are arranged on the outer edge of the disc 2 and are evenly distributed. The diameters of the disc 2 and the front disc 6 are the same. The front end of the front chain 15 is fixed on the outer edge of the front disc 6. The 2N first sprockets 13 are located on the same circle concentric with the axle tube 1, and the 2N second sprockets 14 are located on the same circle concentric with the axle tube 1.

[0012] Furthermore, the rear inner end of the fan-shaped reinforcement plate 11 in the embodiment of the utility model is provided with two mounting plates 17 for mounting the second sprocket 14, and the two second sprockets 14 are respectively arranged on the two mounting plates 17; the two mounting plates 17 are arranged back to back, and are located between the two second sprockets 14, and are arranged in an eight-shaped shape.

[0013] The first sprocket 13 in the embodiment of the present invention is perpendicular to the spokes 4 , and the two second sprockets 14 on the fan-shaped reinforcing plate 11 are respectively arranged opposite to the first sprockets 13 of two adjacent spokes 4 .

[0014] The technical solution provided by the embodiments of the present invention has the following beneficial effects: The embodiments of the present invention provide a diameter reducing device for a seam welder, which reinforces the spokes with fan-shaped reinforcement plates, thereby increasing their strength and also serves to install the second sprocket (avoiding direct stress on the spokes). Two rear chains pull the outer ends of the electrode head, while a front chain pulls the inner middle of the electrode head, forming a stable triangular structure that prevents twisting of the electrode head and deformation of the spokes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the diameter reducing device of the seam welding machine in the embodiment of the present utility model;

[0016] Figure 2 It is the rear side view of the front wheel;

[0017] Figure 3 It is the front side view of the front wheel;

[0018] Figure 4 yes Figure 2 A partial enlarged view of

[0019] Figure 5 yes Figure 3 A partial enlarged view of .

[0020] In the figure: 1 axle tube, 2 disc, 3 outer ring, 4 spokes, 5 slide groove, 6 front disc, 7 rear disc, 8 drive rod, 9 connecting rod, 10 electrode head, 11 fan-shaped reinforcement plate, 12 rear chain, 13 first sprocket, 14 second sprocket, 15 front chain, 16 third sprocket, 17 mounting plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] See also Figure 1-5 , Example 1 provides a diameter-changing device for a seam welding machine, which includes a front wheel and a diameter-changing structure, etc., and the front wheel is driven to rotate by a corresponding driving structure.

[0024] The front wheel comprises a tube 1 extending in the fore-aft direction, a disc 2 at the front end of the tube 1, an outer ring 3 coaxially arranged outside the disc 2, N spokes 4 evenly spaced between the outer ring 3 and the disc 2, and a fan-shaped reinforcement plate 11 (N in total) between the middle sections of two adjacent spokes 4. Slide grooves 5 are provided along the spokes 4, and the outer ring 3 is rotatably mounted on a drive structure.

[0025] The variable diameter structure includes a front disc 6 directly in front of the disc 2, a rear disc 7 directly behind the disc 2, a drive rod 8 at the front end of the shaft tube 1 that can move forward and backward, K connecting rods 9 between the front and rear discs 6 and 7, N front and rear chain groups, and N electrode heads 10. The K connecting rods 9 are evenly distributed around the shaft tube 1 and form a cage-like structure with the front and rear discs 6 and 7. The connecting rods 9 are arranged in a front-to-back direction and slide onto the disc 2 (which has circular holes for the connecting rods 9 to pass through). The disc 2, front disc 6, and rear disc 7 are all coaxially arranged with the shaft tube 1, and the rear disc 7 slides onto the shaft tube 1. N electrode heads 10 slide in N chute 5. The N front and rear chain groups are evenly distributed around the shaft tube 1, and the N rear chain groups are evenly distributed around the shaft tube 1. The electrode heads 10, front and rear chain groups are arranged in a one-to-one correspondence. The driving rod 8 is arranged in the front-to-back direction, is coaxial with the shaft tube 1 , passes through the shaft tube 1 , and is driven to move forward and backward by the corresponding structure of the shaft tube 1 .

[0026] The rear chain assembly includes two first sprockets 13, two second sprockets 14, and two rear chains 12 arranged side by side. The two first sprockets 13 are located on either side of the outer end of the corresponding spoke 4 (the end closest to the axle tube 1 is defined as the inner end, and the end away from the axle tube 1 is the outer end), and are both located between the outer ring 3 and the sector reinforcement plate 11. The two second sprockets 14 are located on the rear inner ends of two adjacent sector reinforcement plates 11, with the two second sprockets 14 on the same sector reinforcement plate 11 arranged side by side (in a figure-eight pattern). The front ends of the two rear chains 12 are connected to either side of the outer end of the electrode head 10, then pass around the outside of the two first sprockets 13, then pass around the front of the two second sprockets 14, and finally connect rearward to the rear disc 7. Furthermore, two mounting plates 17 for mounting the second sprockets 14 are provided on the rear inner ends of the sector reinforcement plate 11. The two second sprockets 14 are mounted on these two mounting plates 17. The two mounting plates 17 are back-to-back arranged between the two second sprockets 14 in a figure eight arrangement. The first sprocket 13 is perpendicular to the spokes 4, and the two second sprockets 14 on the fan-shaped reinforcing plate 11 are respectively arranged opposite the first sprockets 13 of two adjacent spokes 4.

[0027] The front chain assembly includes a front chain 15 and a third sprocket 16, etc. The third sprocket 16 is provided on the disc 2. The front end of the front chain 15 is connected to the front disc 6, passes around the rear side of the third sprocket 16, and then connects to the middle part of the inner end of the corresponding electrode head 10.

[0028] Specifically, the rear end of the rear chain 12 in the embodiment of the present invention is fixed to the outer edge of the rear disc 7, N third sprockets 16 are arranged on the outer edge of the disc 2 and are evenly distributed, the diameter of the disc 2 and the front disc 6 are the same, the diameter of the rear disc 7 is larger than the diameter of the disc 2, the front end of the front chain 15 is fixed to the outer edge of the front disc 6, 2N first sprockets 13 are located on the same circle concentric with the axle tube 1, and 2N second sprockets 14 are located on the same circle concentric with the axle tube 1.

[0029] Example 2

[0030] Example 2 provides a diameter reducing device for a seam welding machine, the structure of which is substantially the same as that of Example 1, except that N is 24 and K is 8 in this embodiment. Therefore, the total number of first sprockets 13 and second sprockets 14 is 48, and the number of third sprockets 16 is 24.

[0031] Among them, "first", "second" and "third" in this patent only serve to distinguish and have no other special meanings.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A diameter reducing device for a seam welding machine, comprising a front wheel and a diameter reducing structure, wherein the front wheel comprises an axle tube (1) arranged in a front-to-back direction, a disc (2) at the front end of the axle tube (1), an outer ring (3) coaxially arranged outside the disc (2), and N spokes (4) evenly distributed between the outer ring (3) and the disc (2), wherein the spokes (4) are provided with a slide groove (5) along the direction in which they are located; The variable diameter structure comprises a front disc (6) in front of the disc (2), a rear disc (7) in rear of the disc (2), a driving rod (8) at the front end of the shaft tube (1) and capable of moving forward and backward, K connecting rods (9) between the front disc (6) and the rear disc (7), N groups of front chain groups, N groups of rear chain groups and N electrode heads (10), wherein the connecting rods (9) are slidably arranged on the disc (2), the N electrode heads (10) are respectively slidably arranged in N chute grooves (5), the rear disc (7) is slidably arranged on the shaft tube (1), and the electrode heads (10), the front chain groups and the rear chain groups are arranged in a one-to-one correspondence; and the characteristic is that, The front wheel further comprises a fan-shaped reinforcement plate (11) between the middle portions of two adjacent spokes (4); The rear chain group comprises two first sprockets (13), two second sprockets (14) and two rear chains (12) arranged side by side; the two first sprockets (13) are respectively arranged on both sides of the outer ends of the corresponding spokes (4) and are both located between the outer ring (3) and the fan-shaped reinforcement plate (11); the two second sprockets (14) are respectively arranged at the rear inner ends of two adjacent fan-shaped reinforcement plates (11), and the two second sprockets (14) on the same fan-shaped reinforcement plate (11) are arranged side by side; the front ends of the two rear chains (12) are respectively connected to the two sides of the outer end of the electrode head (10), and they respectively bypass the two first sprockets (13) outwardly, and then bypass the two second sprockets (14) inwardly, and finally connect to the rear disc (7) backward; The front chain assembly comprises a front chain (15) and a third sprocket (16), wherein the third sprocket (16) is arranged on the disc (2); the front end of the front chain (15) is connected to the front disc (6), passes around the third sprocket (16) backward, and then connects outward to the middle part of the inner end of the corresponding electrode head (10).

2. The diameter reducing device of the seam welding machine according to claim 1, characterized in that: K connecting rods (9) are evenly distributed around the shaft tube (1) and form a cage structure with the front disc (6) and the rear disc (7).

3. The diameter reducing device of the seam welding machine according to claim 2, characterized in that: N groups of front chain groups are evenly distributed around the shaft tube (1), and N groups of rear chain groups are evenly distributed around the shaft tube (1). The circular disc (2), the front disc (6) and the rear disc (7) are all coaxially arranged with the shaft tube (1). The connecting rod (9) is arranged in the front-back direction. The rear end of the rear chain (12) is fixed on the outer edge of the rear disc (7). N third sprockets (16) are arranged on the outer edge of the circular disc (2) and are evenly distributed. The circular disc (2) and the front disc (6) have the same diameter. The front end of the front chain (15) is fixed on the outer edge of the front disc (6). 2N first sprockets (13) are located on the same circle concentric with the shaft tube (1), and 2N second sprockets (14) are located on the same circle concentric with the shaft tube (1).

4. The diameter reducing device of the seam welding machine according to claim 1, characterized in that: Two mounting plates (17) for mounting the second sprockets (14) are provided at the rear inner end of the sector-shaped reinforcement plate (11), and the two second sprockets (14) are respectively provided on the two mounting plates (17); the two mounting plates (17) are arranged back to back, and are located between the two second sprockets (14), and are arranged in an eight-shaped pattern.

5. The diameter reducing device of the seam welding machine according to claim 1, characterized in that: The first sprocket (13) is perpendicular to the spokes (4), and the two second sprockets (14) on the fan-shaped reinforcing plate (11) are respectively arranged opposite to the first sprockets (13) of two adjacent spokes (4).

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