Inner diameter tensioning device for cylindrical workpiece

Abstract

The utility model provides an inner diameter tensioning device for a cylindrical workpiece, which comprises a lifting frame, a first mounting seat is mounted at the moving end of the lifting frame, a second mounting seat is rotatably mounted on the first mounting seat, a driving mechanism for driving the second mounting seat to rotate is mounted at the top of the first mounting seat, and a clamping mechanism for clamping the second mounting seat is mounted at the moving end of the lifting frame. A tensioning assembly is installed in the center of the end, away from the first installation base, of the second installation base and comprises an adjusting mechanism, and a plurality of evenly-distributed supporting mechanisms are installed on the adjusting mechanism. Through the arrangement of the first mounting seat, the second mounting seat and the driving mechanism, the driving mechanism is started to drive the second mounting seat to rotate during use, so that the tensioning assembly supported in the cylindrical workpiece and the cylindrical workpiece rotate simultaneously, and the welding work of the cylindrical workpiece is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of tensioning and fixing devices, and more specifically, to an inner diameter tensioning device for a cylindrical workpiece. Background Technology

[0002] In the machining of cylindrical workpieces, such as turning, grinding, and welding, stable fixation is a key step to ensure machining accuracy and quality. Especially when splicing and welding cylindrical workpieces, tooling is needed to firmly fix the two workpieces to be welded to prevent them from moving during the welding process, so as to ensure that the roundness and other overall shape accuracy of the welded workpiece meet the quality standards.

[0003] A search revealed Chinese Utility Model No. 202221342899.1, which discloses an adjustable cylindrical fixing bracket. A screw is connected to the side of the fixing base, and a connecting frame is fitted onto the screw. Four support arms are connected between the connecting frame and the fixing base via a first support beam and a second support beam. Each support arm is connected between the connecting frame and the fixing base via a first support beam and a second support beam. One end of the first support beam is hinged to the side of the connecting frame, and the other end of the first support beam and one end of the second support beam are hinged together to the inner side of the support arm. The other end of the second support beam is hinged to the side of the fixing base. Compared with existing technologies, this adjustable cylindrical fixing bracket can accommodate cylinders with different inner wall sizes by opening and closing the support arms, eliminating the need for brackets of various sizes, saving costs, facilitating cylinder placement and removal, having a long service life, and high adjustment precision. However, the aforementioned patents have the following shortcomings: they can only provide internal support for cylindrical workpieces during use, and cannot rotate the cylindrical workpieces during welding. Furthermore, if the arc-shaped support surface of the support arm wears or is damaged during use, the entire support arm needs to be replaced, increasing replacement costs and time. Therefore, this utility model proposes a new solution. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of the above-mentioned patent, which can only provide internal support for cylindrical workpieces and cannot drive the cylindrical workpieces to rotate during the welding process. At the same time, if the arc-shaped support surface of the support arm is worn or damaged during use, the entire support arm needs to be replaced, which increases the replacement cost and time cost. Therefore, an inner diameter tensioning device for cylindrical workpieces is proposed.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An inner diameter tensioning device for cylindrical workpieces is provided to improve the above-mentioned problems.

[0007] The present invention is as follows:

[0008] The device includes a lifting frame, a first mounting base mounted on the movable end of the lifting frame, a second mounting base rotatably mounted on the first mounting base, a drive mechanism for rotating the second mounting base mounted on the top of the first mounting base, a tensioning assembly mounted at the center of the end of the second mounting base away from the first mounting base, the tensioning assembly including an adjustment mechanism, a plurality of evenly distributed support mechanisms mounted on the adjustment mechanism, a support arm mounted in the middle of the support mechanism, a pad connected to the outer side of the support arm by a plurality of screws, the outer surface of the pad being arc-shaped, and screw holes that cooperate with the screws being provided on both the support arm and the pad.

[0009] As a preferred technical solution of this utility model, the lifting frame includes a base plate, on which a plurality of evenly distributed mounting holes are provided. A mounting bracket is fixedly installed on the top of the base plate, and a first motor is installed on the top of the mounting bracket. The output end of the first motor is connected to a lead screw, and a slider that cooperates with the first mounting seat is installed on the lead screw.

[0010] As a preferred technical solution of this utility model, two guide rods are provided on one side of the lead screw to install between the base plate and the mounting bracket, a protective cover is installed on the top of the first mounting seat, and guide holes that cooperate with the guide rods are provided on both the first mounting seat and the protective cover.

[0011] As a preferred technical solution of this utility model, the driving mechanism includes a first gear installed on the outside of the second mounting base and a second motor installed on the top of the first mounting base. The second motor is located inside the protective cover, and the output end of the second motor is equipped with a second gear located on the outside of the protective cover.

[0012] As a preferred technical solution of this utility model, the adjustment mechanism includes a first connecting frame installed at one end of the second mounting base, a threaded rod fixedly installed on the first connecting frame, a second connecting frame slidably installed on the outer side of the threaded rod, an adjusting nut threadedly connected to the threaded rod on one side of the second connecting frame, and a handle fixedly installed on the adjusting nut.

[0013] As a preferred technical solution of this utility model, the support mechanism includes a first connecting rod and a second connecting rod, the two ends of the first connecting rod being hinged to the second connecting frame and the support arm respectively, and the two ends of the second connecting rod being hinged to the first connecting frame and the support arm respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the solution of this utility model:

[0016] 1. With the arrangement of the first mounting base, the second mounting base and the drive mechanism, when in use, starting the drive mechanism can drive the second mounting base to rotate, so that the tensioning component supported inside the cylindrical workpiece and the cylindrical workpiece rotate simultaneously, which facilitates the welding work of the cylindrical workpiece;

[0017] 2. By setting a pad, the support arm can be protected during use, avoiding direct contact between the support arm and the inner wall of the workpiece, reducing the problem of scratching and wear of the support arm during use. At the same time, if the pad is worn or damaged during use, the pad can be removed for repair and replacement by unscrewing the screws connecting the support arm and the pad, without having to replace the entire support arm. This makes it more convenient to use and can effectively reduce replacement costs and time costs. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the inner diameter tensioning device for cylindrical workpieces provided by this utility model;

[0019] Figure 2 A schematic diagram of the overall structure of the inner diameter tensioning device for cylindrical workpieces provided by this utility model;

[0020] Figure 3 A schematic diagram of the base plate structure of the inner diameter tensioning device for cylindrical workpieces provided by this utility model;

[0021] Figure 4 A schematic diagram of the first connecting frame structure of the inner diameter tensioning device for cylindrical workpieces provided by this utility model;

[0022] Figure 5 A schematic diagram of the pad structure of the inner diameter tensioning device for cylindrical workpieces provided by this utility model;

[0023] Figure 6 A schematic diagram of the first mounting base structure of the inner diameter tensioning device for cylindrical workpieces provided by this utility model.

[0024] The image shows:

[0025] 1. Lifting frame; 2. First mounting base; 3. Second mounting base; 4. Drive mechanism; 5. Adjustment mechanism; 6. Support mechanism; 7. Support arm; 8. Pad; 9. Screw; 10. Protective cover; 11. Screw hole; 12. Guide hole; 101. Base plate; 102. Mounting bracket; 103. Lead screw; 104. Slider; 105. First motor; 106. Guide rod; 107. Mounting hole; 401. First gear; 402. Second motor; 403. Second gear; 501. First connecting bracket; 502. Second connecting bracket; 503. Threaded rod; 504. Adjusting nut; 505. Handle; 601. First connecting rod; 602. Second connecting rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0027] like Figures 1-6 As shown, this embodiment proposes an inner diameter tensioning device for a cylindrical workpiece, including a lifting frame 1. A first mounting base 2 is installed on the movable end of the lifting frame 1, and a second mounting base 3 is rotatably mounted on the first mounting base 2. A drive mechanism 4 for driving the second mounting base 3 to rotate is installed on the top of the first mounting base 2. A tensioning component is installed at the center of the end of the second mounting base 3 away from the first mounting base 2. Through the arrangement of the first mounting base 2, the second mounting base 3, and the drive mechanism 4, when in use, activating the drive mechanism 4 can drive the second mounting base 3 to rotate, so that the tensioning component supported inside the cylindrical workpiece and the cylindrical workpiece rotate simultaneously, facilitating the welding of the cylindrical workpiece. The tensioning component includes an adjusting mechanism 5, on which multiple evenly distributed support mechanisms 6 are installed. A support arm 7 is installed in the middle of the support mechanism 6. In use, the support arm 7 can be adjusted by the adjusting mechanism 5 and the support mechanism 6. The position is adjusted to facilitate the tensioning and fixing of the pad 8 from the inner wall of the cylindrical workpiece. The outer side of the support arm 7 is connected to the pad 8 by multiple screws 9. The outer surface of the pad 8 is arc-shaped. Both the support arm 7 and the pad 8 have screw holes 11 that cooperate with the screws 9. By setting the pad 8, the support arm 7 can be protected during use, avoiding direct contact between the support arm 7 and the inner wall of the workpiece, reducing the problem of scratching and wear of the support arm 7 during use. At the same time, if the pad 8 is worn or damaged during use, the pad 8 can be removed for repair and replacement by unscrewing the screws 9 connecting the support arm 7 and the pad 8, without having to replace the entire support arm 7. This makes it more convenient to use and can effectively reduce replacement costs and time costs. In addition, the pad 8 can be made of different materials according to the hardness of the cylindrical workpiece, so as to better protect the inner wall of the cylindrical workpiece.

[0028] like Figures 1-3As shown, in a preferred embodiment, based on the above method, the lifting frame 1 further includes a base plate 101 with a plurality of evenly distributed mounting holes 107. A mounting bracket 102 is fixedly mounted on the top of the base plate 101, and a first motor 105 is mounted on the top of the mounting bracket 102. The output end of the first motor 105 is connected to a lead screw 103, and a slider 104 that cooperates with the first mounting seat 2 is mounted on the lead screw 103. It should be noted that during use, the pneumatic first motor 105 can drive the first mounting seat 2 to adjust its position through the lead screw 103 and the slider 104, thereby lifting the cylindrical workpiece on the tensioning assembly off the ground, making it easier to rotate through the drive mechanism 4. The mounting holes 107 facilitate the use of bolts to fix the lifting frame 1 to the ground or some support platform.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, in a preferred embodiment, based on the above method, a further step is to provide two guide rods 106 between the mounting base plate 101 and the mounting bracket 102 on one side of the lead screw 103. A protective cover 10 is installed on the top of the first mounting seat 2. Both the first mounting seat 2 and the protective cover 10 have guide holes 12 that cooperate with the guide rods 106. It should be noted that the guide rods 106 and guide holes 12 can guide the first mounting seat 2 when it rises or falls, ensuring its stability during movement.

[0030] like Figure 1 , Figure 2 and Figure 6 As shown, in a preferred embodiment, based on the above method, the drive mechanism 4 further includes a first gear 401 mounted on the outside of the second mounting base 3 and a second motor 402 mounted on the top of the first mounting base 2. The second motor 402 is located inside the protective cover 10, and the output end of the second motor 402 is equipped with a second gear 403 located on the outside of the protective cover 10. It should be noted that in use, the starter 402 can drive 3 to rotate through 403 and 401, thereby driving the tensioning assembly mounted on 3 to rotate.

[0031] like Figure 1 , Figure 2 and Figure 4As shown, in a preferred embodiment, based on the above method, the adjusting mechanism 5 further includes a first connecting frame 501 installed at one end of the second mounting base 3. A threaded rod 503 is fixedly installed on the first connecting frame 501. A second connecting frame 502 is slidably installed on the outer side of the threaded rod 503. An adjusting nut 504, which is threadedly connected to the threaded rod 503, is provided on one side of the second connecting frame 502. A handle 505 is fixedly installed on the adjusting nut 504. It should be noted that during use, the adjusting nut 504 can be rotated using the handle 505 to adjust the position of the second connecting frame 502 on the threaded rod 503, thereby adjusting the opening and closing angle of the support mechanism 6, so that the support arm 7 can be used with cylindrical workpieces of different diameters.

[0032] like Figure 1 , Figure 2 and Figure 4 As shown, in a preferred embodiment, based on the above method, the support mechanism 6 further includes a first connecting rod 601 and a second connecting rod 602. The two ends of the first connecting rod 601 are hinged to the second connecting frame 502 and the support arm 7, respectively, and the two ends of the second connecting rod 602 are hinged to the first connecting frame 501 and the support arm 7, respectively. It should be noted that, in use, the arrangement of 601 and 602 allows for adjustment of the position of 7 by adjusting the opening angle between them, facilitating the tensioning and fixing of cylindrical workpieces with different inner diameters using 7 and 8.

[0033] Specifically, the working principle of the inner diameter tensioning device for this cylindrical workpiece is as follows: When welding two cylindrical workpieces together, the two cylindrical workpieces are respectively placed on the outside of the tensioning components in the two devices. Then, the opening and closing angle of the support mechanism 6 is adjusted by the adjusting mechanism 5 to adjust the position of the support arm 7 and the pad 8. The pad 8 is pressed against the inner wall of the cylindrical workpiece to tighten and fix it. Then, the lifting frame 1 drives the cylindrical workpiece to rise so that the bottom of the workpiece is off the ground. At the same time, the two ends of the cylindrical workpiece to be welded are activated. During the welding process, the drive mechanism 4 is activated to drive the second mounting base 3 to rotate, so that the tensioning component supported inside the cylindrical workpiece and the cylindrical workpiece rotate simultaneously, thereby facilitating the welding process.

[0034] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A device for expanding the inner diameter of a cylindrical workpiece, comprising a lifting frame (1), characterised in that, The lifting frame (1) is equipped with a first mounting base (2) at its movable end. A second mounting base (3) is rotatably mounted on the first mounting base (2). A drive mechanism (4) for driving the second mounting base (3) to rotate is mounted on the top of the first mounting base (2). A tensioning component is mounted at the center of the end of the second mounting base (3) away from the first mounting base (2). The tensioning component includes an adjustment mechanism (5). Multiple evenly distributed support mechanisms (6) are mounted on the adjustment mechanism (5). A support arm (7) is mounted in the middle of the support mechanism (6). A pad (8) is connected to the outside of the support arm (7) by multiple screws (9). The outer surface of the pad (8) is arc-shaped. Screw holes (11) that cooperate with the screws (9) are opened on both the support arm (7) and the pad (8).

2. An internal diameter expander for a cylindrical workpiece as claimed in claim 1, wherein, The lifting frame (1) includes a base plate (101), on which a plurality of evenly distributed mounting holes (107) are provided. A mounting bracket (102) is fixedly installed on the top of the base plate (101), and a first motor (105) is installed on the top of the mounting bracket (102). The output end of the first motor (105) is connected to a lead screw (103), and a slider (104) that cooperates with the first mounting seat (2) is installed on the lead screw (103).

3. An internal diameter expander for a cylindrical workpiece as claimed in claim 2, wherein, Two guide rods (106) are provided on one side of the lead screw (103) and installed between the base plate (101) and the mounting bracket (102). A protective cover (10) is installed on the top of the first mounting seat (2). Guide holes (12) that cooperate with the guide rods (106) are provided on both the first mounting seat (2) and the protective cover (10).

4. An internal diameter expander for a cylindrical workpiece as claimed in claim 3, wherein, The drive mechanism (4) includes a first gear (401) mounted on the outside of the second mounting base (3) and a second motor (402) mounted on the top of the first mounting base (2). The second motor (402) is located inside the protective cover (10), and the output end of the second motor (402) is equipped with a second gear (403) located outside the protective cover (10).

5. The apparatus of claim 1 wherein, The adjustment mechanism (5) includes a first connecting frame (501) installed at one end of the second mounting base (3), a threaded rod (503) fixedly installed on the first connecting frame (501), a second connecting frame (502) slidably installed on the outside of the threaded rod (503), an adjusting nut (504) threadedly connected to the threaded rod (503) on one side of the second connecting frame (502), and a handle (505) fixedly installed on the adjusting nut (504).

6. An internal diameter expander for a cylindrical workpiece as claimed in claim 5 wherein, The support mechanism (6) includes a first connecting rod (601) and a second connecting rod (602). The two ends of the first connecting rod (601) are respectively hinged to the second connecting frame (502) and the support arm (7), and the two ends of the second connecting rod (602) are respectively hinged to the first connecting frame (501) and the support arm (7).

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