A steel pipe fitting elbow angle adjustment device

Abstract

This utility model relates to the field of pipe fitting elbow adjustment technology, specifically a steel pipe fitting elbow angle adjustment device, including a base. Mounting plates are fixedly connected to both the front and rear ends of the base. A rotating assembly is installed inside the base, comprising a first motor fixedly mounted on the right side of the base. A worm gear is fixedly connected to the rotating shaft of the first motor, and the left side of the worm gear is engaged in a first fixed sleeve. A second fixed sleeve is fixedly connected to the lower middle position inside the base, and a rotating rod is inserted into the upper end of the second fixed sleeve. A worm wheel is sleeved on the rotating rod. The meshing transmission ratio of the worm and worm wheel is large, converting the high-speed rotation of the first motor into low-speed, high-precision rotation of the rotating rod, meeting the high-precision requirements of aerospace, nuclear power, and other industries. The self-locking characteristics of the worm wheel and worm gear ensure that the angle will not shift due to external force after the machine stops, improving stability.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting elbow adjustment technology, specifically a steel pipe fitting elbow angle adjustment device. Background Technology

[0002] Aerospace, nuclear power, and high-end hydraulic systems have extremely high requirements for the accuracy of elbow angles, which traditional methods cannot meet. With the development of intelligent manufacturing, manual adjustment is inefficient and labor-intensive, and there is an urgent need for automated equipment to replace it. In small-batch, multi-variety production, frequent tooling changes lead to long downtime and increased costs.

[0003] Traditional techniques rely on manual experience to adjust elbow angles using tools such as wrenches and protractors, which is inefficient and difficult to guarantee accuracy. Elbows of different pipe diameters and wall thicknesses require customized special tooling, resulting in high costs and cumbersome changeovers. The adjustment process can easily cause scratches or deformation to the elbow surface, especially affecting high-precision components such as thin-walled pipes and stainless steel. To address these issues, we have proposed a steel pipe fitting elbow angle adjustment device. Utility Model Content

[0004] The purpose of this utility model is to provide a steel pipe fitting elbow angle adjustment device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel pipe fitting elbow angle adjustment device, comprising a base, with mounting plates fixedly connected to both the front and rear ends of the base, a rotating assembly installed inside the base, the rotating assembly comprising a first motor, the first motor being fixedly installed on the right side of the base, a worm gear being fixedly connected to the rotating shaft of the first motor, and the left side of the worm gear being engaged in a first fixed sleeve, a second fixed sleeve being fixedly connected to the middle position of the lower end of the base, and a rotating rod being inserted into the upper end of the second fixed sleeve, a worm gear being sleeved on the rotating rod, a connecting plate being fixedly connected to the upper end of the rotating rod, and a clamping assembly being fixedly connected to the upper end of the connecting plate, the clamping assembly comprising a fixed frame, the fixed frame being fixedly connected to the upper end of the connecting plate, a movable rod being fixedly connected to the middle position inside the fixed frame, and a first connecting rod being sleeved on the outer side of the movable rod, a second connecting rod being connected to the other end of the first connecting rod, and a third connecting rod being connected to the other end of the second connecting rod, a limit plate being connected to the other end of the third connecting rod, and a second motor being fixedly installed at the front end of the movable rod.

[0006] Preferably, the mounting plate has mounting holes, and the mounting plate has four sets of holes.

[0007] Preferably, the left side of the worm gear is movably engaged in the first fixed sleeve by an annular locking block, and the first fixed sleeve has a locking groove that cooperates with the annular locking block.

[0008] Preferably, the lower end of the rotating rod is movably engaged with the second fixed sleeve by an annular locking block, and the second fixed sleeve is provided with a slot that cooperates with the annular locking block.

[0009] Preferably, the worm and the worm wheel mesh with each other.

[0010] Preferably, the middle position of the first connecting rod is movably sleeved on the movable rod, and the other end of the first connecting rod is hinged to the second connecting rod.

[0011] Preferably, the other end of the second connecting rod is hinged to the third connecting rod, and the other end of the third connecting rod is hinged to the limiting plate. The two sets of limiting plates are arranged in an arc shape on the side that is close to each other, and a rubber pad is fixedly connected to the side that is close to each other of the two sets of limiting plates.

[0012] This utility model provides a device for adjusting the angle of a steel pipe fitting elbow, which has the following advantages:

[0013] The worm gear and worm wheel have a large meshing transmission ratio, which converts the high-speed rotation of the first motor into the low-speed, high-precision rotation of the rotating rod, meeting the high-precision requirements of aviation, nuclear power and other industries. The self-locking characteristics of the worm gear and worm wheel ensure that the angle will not shift due to external force after the machine stops, thus improving stability.

[0014] The first connecting rod, the second connecting rod, and the third connecting rod form a parallelogram mechanism to ensure that the elbow remains axially aligned during rotation, avoiding offset or tilting. The movable rod pushes the first connecting rod to apply force evenly, preventing localized deformation of the thin-walled tube under pressure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the fixing frame of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the base of this utility model;

[0019] Figure 4 This is an exploded structural diagram of the worm gear and worm shaft components of this utility model.

[0020] In the diagram: 1. Base; 2. Mounting plate; 3. First motor; 4. Worm gear; 5. First fixing sleeve; 6. Second fixing sleeve; 7. Rotating rod; 8. Worm wheel; 9. Connecting plate; 10. Fixing frame; 11. Movable rod; 12. First connecting rod; 13. Second connecting rod; 14. Third connecting rod; 15. Limiting plate; 16. Second motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a steel pipe fitting elbow angle adjustment device, including a base 1, with mounting plates 2 fixedly connected to both the front and rear ends of the base 1. A rotating assembly is installed inside the base 1, including a first motor 3, which is fixedly installed on the right side of the base 1. A worm gear 4 is fixedly connected to the rotating shaft of the first motor 3, and the left side of the worm gear 4 is engaged in a first fixed sleeve 5. A second fixed sleeve 6 is fixedly connected to the lower middle position inside the base 1, and a rotating rod 7 is inserted into the upper end of the second fixed sleeve 6. A worm wheel 8 is sleeved on the rotating rod 7. A connecting plate 9 is fixedly connected to the upper end of the movable rod 7, and a clamping assembly is fixedly connected to the upper end of the connecting plate 9. The clamping assembly includes a fixed frame 10, which is fixedly connected to the upper end of the connecting plate 9. A movable rod 11 is fixedly connected to the middle position inside the fixed frame 10, and a first connecting rod 12 is sleeved on the outer side of the movable rod 11. A second connecting rod 13 is connected to the other end of the first connecting rod 12, and a third connecting rod 14 is connected to the other end of the second connecting rod 13. A limit plate 15 is connected to the other end of the third connecting rod 14. A second motor 16 is fixedly installed at the front end of the movable rod 11.

[0023] Mounting plate 2 has mounting holes, and there are four sets of mounting plates 2. The left side of the worm 4 is movably engaged in the first fixed sleeve 5 by an annular locking block, and the first fixed sleeve 5 has a groove that mates with the annular locking block. The lower end of the rotating rod 7 is movably engaged in the second fixed sleeve 6 by an annular locking block, and the second fixed sleeve 6 has a groove that mates with the annular locking block. The worm 4 and the worm wheel 8 mesh with each other. The worm 4 and the rotating rod 7 achieve dual axial and radial positioning through the engagement of the annular locking block with the grooves of the first fixed sleeve 5 and the second fixed sleeve 6, avoiding axial movement or radial offset during transmission. The tight fit between the groove and the annular locking block restricts the movement of the worm 4 and the rotating rod 7. The torsional freedom of the worm 4 and the rotating rod 7 ensures the accuracy of the worm gear 8 and worm 4 transmission. The rigid contact between the locking block and the slot reduces the dependence on lubrication, making it suitable for dusty or oily environments (such as workshop assembly lines). The large meshing ratio between the worm 4 and the worm gear 8 converts the high-speed rotation of the first motor 3 into the low-speed, high-torque output of the rotating rod 7, making it suitable for driving large inertial loads (such as heavy bends). The self-locking characteristics of the worm gear 8 and worm 4 ensure that the angle will not shift due to external forces (such as gravity or vibration) after the machine stops, improving safety. Two sets of mounting plates 2 are set at each of the front and rear ends of the base 1, which can be quickly fixed to the workbench or assembly line through the mounting holes, adapting to different production scenarios.

[0024] The first connecting rod 12 is movably sleeved on the movable rod 11 at its middle position. The other end of the first connecting rod 12 is hinged to the second connecting rod 13, and the other end of the second connecting rod 13 is hinged to the third connecting rod 14. The other end of the third connecting rod 14 is hinged to the limiting plate 15. The two sets of limiting plates 15 are arranged in an arc shape on their adjacent sides. Rubber pads are fixedly connected to the adjacent sides of both sets of limiting plates 15. The first connecting rod 12, the second connecting rod 13, and the third connecting rod 14 form a multi-stage hinge chain, which converts the linear motion of the movable rod 11 into the synchronous opening and closing action of the limiting plate 15, ensuring a uniform distribution of clamping force. The hinge structure allows the connecting rod to freely adjust its angle within a certain range, automatically adapting to the curvature of different bends (such as 90°, 180°, or irregular bends), avoiding deformation or stress concentration caused by forced clamping. The forward and backward movement of the movable rod 11 drives the first connecting rod 12 to expand or contract, realizing the rapid opening and closing of the clamping assembly and improving clamping efficiency by more than 30%. The small displacement of the movable rod 11 can be amplified into the significant opening and closing amount of the limiting plate 15 through the hinge lever. It is suitable for fine adjustment of the clamping force of thin-walled pipes or fragile materials. The arc-shaped inner side of the limiting plate 15 fits tightly with the outer surface of the elbow, with a large contact area, dispersing clamping pressure and avoiding local indentations or scratches (especially for soft materials such as stainless steel and aluminum alloy). The arc structure restricts the axial movement of the elbow, ensuring the stability of the elbow position during adjustment and reducing angular deviation. The high friction of the rubber pad prevents the elbow from slipping during clamping or rotation. It is especially suitable for thin-walled pipes or coated pipes with smooth surfaces. The rubber pad can absorb the impact force during clamping, avoid rigid contact that leads to material yielding or fatigue damage, and extend the service life of the elbow.

[0025] Working principle: The second motor 16 drives the movable rod 11 to move forward, pushing the first connecting rod 12 to expand outward. Through the hinge transmission of the second connecting rod 13 and the third connecting rod 14, the two sets of limiting plates 15 close inward, clamping the elbow. The rubber pads on the inner side of the limiting plates 15 increase friction to prevent the elbow from slipping, while buffering the clamping force and protecting the elbow surface. The first motor 3 drives the worm gear 4 to rotate. The worm gear 4 drives the worm wheel 8 to rotate through meshing. The worm wheel 8 is fixed on the rotating rod 7, driving the connecting plate 9 and the clamping assembly to rotate around the rotating rod 7, realizing precise adjustment of the elbow angle. By controlling the speed and direction of the first motor 3, the elbow is rotated to the target angle. The reduction ratio of the worm wheel 8 and the worm gear 4 ensures the angle adjustment accuracy. The second motor 16 drives the movable rod 11 to move backward, pulling the first connecting rod 12 to retract inward. Through the hinge linkage, the two sets of limiting plates 15 separate outward, releasing the elbow. The first motor 3 and the second motor 16 are turned off, and the device returns to its initial state, waiting for the next operation.

[0026] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0028] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A steel pipe fitting elbow angle adjustment device, comprising a base (1), characterized in that: Mounting plates (2) are fixedly connected to both the front and rear ends of the base (1). A rotating assembly is installed inside the base (1). The rotating assembly includes a first motor (3). The first motor (3) is fixedly installed on the right side of the base (1). A worm gear (4) is fixedly connected to the rotating shaft of the first motor (3). The left side of the worm gear (4) is engaged in the first fixing sleeve (5). A second fixing sleeve (6) is fixedly connected to the middle position of the lower end of the base (1). A rotating rod (7) is inserted into the upper end of the second fixing sleeve (6). A worm wheel (8) is sleeved on the rotating rod (7). A connecting plate (9) is fixedly connected to the upper end of the rotating rod (7). The upper end of the connecting plate (9) is fixedly connected to a clamping assembly, which includes a fixed frame (10). The fixed frame (10) is fixedly connected to the upper end of the connecting plate (9). A movable rod (11) is fixedly connected to the middle position inside the fixed frame (10). A first connecting rod (12) is sleeved on the outside of the movable rod (11). The other end of the first connecting rod (12) is connected to a second connecting rod (13). The other end of the second connecting rod (13) is connected to a third connecting rod (14). The other end of the third connecting rod (14) is connected to a limit plate (15). A second motor (16) is fixedly installed at the front end of the movable rod (11).

2. The steel pipe fitting elbow angle adjustment device according to claim 1, characterized in that: The mounting plate (2) has mounting holes, and there are four sets of mounting holes in total.

3. The steel pipe fitting elbow angle adjustment device according to claim 1, characterized in that: The left side of the worm (4) is movably engaged in the first fixed sleeve (5) by a ring-shaped locking block, and the first fixed sleeve (5) is provided with a slot that cooperates with the ring-shaped locking block.

4. The steel pipe fitting elbow angle adjustment device according to claim 1, characterized in that: The lower end of the rotating rod (7) is movably engaged with the second fixed sleeve (6) by a ring-shaped locking block, and the second fixed sleeve (6) is provided with a slot that cooperates with the ring-shaped locking block.

5. The steel pipe fitting elbow angle adjustment device according to claim 1, characterized in that: The worm (4) meshes with the worm wheel (8).

6. The steel pipe fitting elbow angle adjustment device according to claim 1, characterized in that: The middle position of the first connecting rod (12) is movably sleeved on the movable rod (11), and the other end of the first connecting rod (12) is hinged to the second connecting rod (13).

7. The steel pipe fitting elbow angle adjustment device according to claim 1, characterized in that: The other end of the second connecting rod (13) is hinged to the third connecting rod (14), and the other end of the third connecting rod (14) is hinged to the limiting plate (15). The two sets of limiting plates (15) are arranged in an arc shape on the side that is close to each other, and rubber pads are fixedly connected to the side that is close to each other of the two sets of limiting plates (15).

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