Pressing wheel mechanism facilitating distance control

Abstract

The utility model relates to the technical field of pipe pile forming machines, in particular to a pinch roller mechanism convenient for distance control, and aims to solve the technical problems that in the prior art, the rotating resistance of a pipe die is large, and heat is easily accumulated on the surface of a pinch roller, the pinch roller mechanism specifically comprises a box body, and an inner cavity is formed in the box body; the rotating seat is fixedly arranged on the side plate of the box body; one end of the swing arm is rotationally connected with the rotating seat through a rotating shaft; the pressing wheel is arranged at the other end of the swing arm and is rotationally connected with the swing arm through a wheel shaft; the driving mechanism is arranged in the inner cavity and can drive the swing arm to swing up and down around the rotating seat; the driving mechanism comprises a movable arm, one end of the movable arm penetrates through a through opening formed in a side plate of the box body and is fixedly connected with the near end of a swing arm into a whole; by arranging the limiting device matched with the jacking device, accurate adjustment of the distance between the pressing wheel and the pipe die is achieved, the problems that due to the fact that a distance control mechanism is lacked in a traditional pressing wheel mechanism, continuous pressing fit between the pressing wheel and the pipe die is caused, and resistance is increased are solved, and the heat accumulation phenomenon of the wheel face of the pressing wheel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pile forming machines, in particular to a pressure wheel mechanism which is convenient for distance control. Background Art

[0002] Post-tensioned prestressed concrete large-diameter pipe piles, referred to as large pipe piles, are a type of prestressed concrete pipe pile formed by a composite process of vibration, roller pressing and centrifugal forming. They are self-anchored by grouting after water curing and steam curing, and then spliced and tensioned. They have the characteristics of strong bearing capacity, good seismic resistance, high durability, high construction efficiency, environmental protection and energy saving. They are widely used in various fields such as construction, water conservancy, and transportation construction.

[0003] The Cement Pipe Centrifugal Forming Machine is a mechanical device that manufactures cement pipe piles based on the principle of centrifugal cement forming. This machine centrifuges, rolls, and vibrates cement raw materials within a corresponding pipe mold to produce cement pipe piles. It features two parallel rotating shafts, each equipped with a fixed positioning wheel assembly to support and guide the rotation of the cement pipe mold. One of the rotating shafts is designated as the driving shaft and is connected to a drive motor. Rotation of the driving shaft drives the positioning wheel assembly, achieving centrifugal rotation of the pipe mold.

[0004] However, the pipe mold is prone to wear and loss of roundness after long-term use, causing it to occasionally jump during centrifugal rotation, posing a safety hazard to the machine and endangering the safety of workers. Some forming machines have a pressing wheel mechanism on both sides of the pipe mold to prevent the pipe pile from being dislocated. However, the traditional pressing wheel mechanism has a simple structure, simply using the pressing wheel to continuously press the pipe pile downward on the positioning wheel group, lacking an effective distance control mechanism. This increases the rotational resistance of the pipe mold and the load on the drive motor, affecting the overall operating efficiency of the equipment. In addition, the long-term pressing contact between the pressing wheel and the rotating pipe pile causes a large amount of heat to accumulate on the wheel surface, which in turn reduces the service life of the pressing wheel and may even affect the performance of the cement raw materials inside the pipe pile. Utility Model Content

[0005] The technical problem to be solved by the utility model is to address the deficiencies of the existing technology and provide a pressure wheel mechanism that is easy to control the distance, which can effectively reduce the load of the driving motor, improve the overall operating efficiency of the equipment, extend the service life of the pressure wheel, and ensure that the performance of the cement raw materials inside the pipe pile is not affected.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A pressure wheel mechanism for convenient distance control, comprising:

[0008] a box body having an inner cavity formed therein;

[0009] A swivel seat, which is fixed on the side panel of the box;

[0010] A swing arm, one end of which is rotatably connected to the swivel seat via a rotating shaft;

[0011] A pressure wheel is provided at the other end of the swing arm and is rotatably connected to the swing arm through a wheel shaft;

[0012] A driving mechanism is provided in the inner cavity and is capable of driving the swing arm to swing up and down around the rotating seat;

[0013] Its characteristics are: the driving mechanism includes:

[0014] The movable arm has one end passing through the opening provided in the side panel of the box body and is fixedly connected to the proximal end of the swing arm;

[0015] A hinge seat, which is fixed between the movable arm and the bottom of the inner cavity;

[0016] A lifting device is provided between the hinge seat and the movable arm, and can drive the movable arm to flip upward around the rotating seat with the hinge seat as a fulcrum;

[0017] A limit device is provided at the top of the box body, with a limit end downwardly disposed in the inner cavity and capable of being adjusted up and down;

[0018] The stopper is fixedly arranged at the other end of the movable arm and can stop the limit end when the movable arm is flipped up.

[0019] The technical problem to be solved by the present invention can be further achieved through the following steps: the limiting device includes an upper splint arranged above the box body, a lower splint arranged in the inner cavity of the box body, and a support frame arranged between the upper splint and the lower splint and fixed to the top plate of the box body. The upper splint and the lower splint are clamped and fixed to the upper and lower sides of the support frame by fasteners passing through the top plate of the box body. A limiting seat is fixed below the lower splint, and a screw structure that cooperates with the limiting seat is provided in the support frame.

[0020] The technical problem to be solved by the present invention can be further achieved through the following steps: a mounting hole is vertically provided in the middle of the upper splint, an anti-rotation hole coaxial with the mounting hole is provided in the limit seat, the screw structure includes an outer sleeve rotatably arranged in the mounting hole, the inner edge of the outer sleeve is provided with a thread, an inner screw is coaxially provided on the inner side of the outer sleeve, the lower end of the inner screw extends downward from the limit seat, and a driving section that cooperates with the thread of the outer sleeve and a limiting section that slides with the anti-rotation hole are provided on the inner screw.

[0021] The technical problem to be solved by the present invention can be further achieved through the following steps: the outer circumference of the inner screw limiting section is fixedly provided with spline teeth, and the inner circumference of the anti-rotation hole is fixedly provided with a spline groove, and the spline teeth can cooperate with the spline groove to limit the rotation of the inner screw relative to the limiting seat.

[0022] The technical problem to be solved by the present invention can be further achieved through the following steps: the stop part includes an extension arm and a stop plate, the extension arm is coaxially fixed to the movable arm as a whole, the stop plate is fixed on the extension arm, when the movable arm is placed flat, a positive angle of 15 to 30 degrees is formed between the plate surface of the stop plate and the horizontal plane, and a wear-resistant rubber pad that cooperates with the stop plate is provided at the lower end of the inner screw.

[0023] The technical problem to be solved by the present invention can be further achieved through the following steps: the stop part includes a connecting seat and a stop plate, the connecting seat is fixedly installed on the upper end surface of the boom, the stop plate is rotatably connected to the connecting seat, and a wear-resistant rubber pad that matches the stop plate is provided at the lower end of the inner screw.

[0024] The technical problem to be solved by the present invention can be further achieved through the following steps: the jacking device is a driving cylinder or a driving oil cylinder, the fixed end of the jacking device is rotatably connected to the hinge seat, and the telescopic end of the jacking device is rotatably connected to the proximal end of the boom.

[0025] The technical problem to be solved by the present invention can be further achieved through the following steps: the support frame is a rectangular frame structure with upper and lower openings, and the lower end face of the support frame is fixedly connected to the top plate of the box body; the limit seat is a stepped shaft structure with a wide top and a narrow bottom, and the limit seat and the lower splint are fixedly connected as one.

[0026] Compared with the existing technology, the beneficial effects of the present invention are: by setting a limit device coordinated with the jacking device, the lower dead point of the swing arm movement can be flexibly adjusted, thereby realizing precise adjustment of the distance between the pressure wheel and the pipe mold, avoiding the problem of continuous pressing and increased resistance between the pressure wheel and the pipe mold due to the lack of a distance control mechanism in the traditional pressure wheel mechanism, effectively reducing the operating load of the drive motor, improving the overall production efficiency, reducing the heat accumulation on the pressure wheel surface, effectively extending the service life of the pressure wheel, ensuring the uniformity and performance of the cement raw materials inside the pipe pile, and improving the quality of the finished pipe pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 Schematic diagram a of the operation of embodiment 1 of the present utility model;

[0029] Figure 3 Schematic diagram b of the operation of embodiment 1 of the present utility model;

[0030] Figure 4 This is a schematic structural diagram of the limit device of the utility model;

[0031] Figure 5Schematic cross-sectional view of the limit device of the present invention (without the support frame);

[0032] Figure 6 This is a structural diagram of the limit seat of the utility model;

[0033] Figure 7 This is an operational schematic diagram a of Example 2 of the present utility model;

[0034] Figure 8 This is the operational schematic diagram b of Example 2 of the present utility model;

[0035] In the figure: 1-box; 2-swivel seat; 3-swing arm; 4-pressure wheel; 5-movable arm; 6-hinge seat; 7-upper splint; 8-lower splint; 9-support frame; 10-limit seat; 11-anti-rotation hole; 12-outer sleeve; 13-inner screw; 14-spline teeth; 15-extension arm; 16-stop plate; 17-wear-resistant rubber pad; 18-connecting seat; 19-driving cylinder; 20-pipe mold. DETAILED DESCRIPTION

[0036] The specific technical solutions of the present invention are further described below so that those skilled in the art can further understand the present invention, but it does not constitute a limitation to their rights.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0038] [Example 1]

[0039] Please refer to Figure 1-6A pressure wheel mechanism for convenient distance control includes a box body 1, which is a rectangular parallelepiped structure with an inner cavity formed therein; a swivel seat 2, which is fixedly mounted on a side panel on one side of the box body 1; a swing arm 3, one end of which is rotatably connected to the swivel seat 2 through a rotating shaft; a pressure wheel 5, which is provided at the other end of the swing arm 3 and is rotatably connected to the swing arm 3 through a wheel axle; a driving mechanism, which is provided in the inner cavity and can drive the swing arm 3 to swing up and down around the swivel seat 2. The driving mechanism includes: a movable arm 5, one end of which passes through a through hole opened on the side panel of the box body 1 and is fixedly connected to the proximal end of the swing arm 3; a hinge seat 6, which is fixed between the movable arm 5 and the bottom of the inner cavity; a lifting device, which is provided between the hinge seat 6 and the movable arm 5, and can use the hinge seat 6 as a fulcrum to drive the movable arm 5 to flip upward around the swivel seat 2; a limiting device, which is provided at the top of the box body 1, and the limiting end is downwardly provided in the inner cavity and can be adjusted up and down; a stop part, which is fixed at the other end of the movable arm 5, and can stop each other with the limiting end when the movable arm 5 is flipped up.

[0040] Specifically, the swivel seat 2 is two bearing seats arranged side by side; there are two pressure wheels 5; the boom 5 and the hinge seat 6 are in the same plane, and the two form an obtuse positive angle with the opening upward; the jacking device is a driving cylinder or a driving oil cylinder 19, the fixed end of the jacking device is rotatably connected to the hinge seat 6, and the telescopic end of the jacking device is rotatably connected to the proximal end of the boom 5.

[0041] The limiting device includes an upper splint 7 arranged above the box body 1, a lower splint 8 arranged in the inner cavity of the box body 1, and a support frame 9 arranged between the upper splint 7 and the lower splint 8 and fixed to the top plate of the box body 1. The upper splint 7 and the lower splint 8 are clamped and fixed to the upper and lower sides of the support frame 9 by fasteners passing through the top plate of the box body 1. A limiting seat 10 is fixed below the lower splint 8, and a screw structure that cooperates with the limiting seat 10 is provided in the support frame 9.

[0042] Specifically, the support frame 9 is a rectangular frame structure with upper and lower openings. The lower end face of the support frame 9 is fixedly connected to the top plate of the box body 1. The upper splint 7 covers the upper end face of the support frame 9, and the lower splint 8 is fitted with the top plate of the box body 1 for limiting position; the limit seat 10 is a stepped shaft structure that is wide at the top and narrow at the bottom, and the limit seat 10 and the lower splint 8 are fixedly connected as a whole.

[0043] A mounting hole is vertically provided in the middle of the upper splint 7, and an anti-rotation hole 11 coaxial with the mounting hole is provided in the limit seat 10. The screw structure includes an outer sleeve 12 rotatably provided in the mounting hole, the inner edge of the outer sleeve 12 is provided with a thread, and an inner screw 13 is coaxially provided on the inner side of the outer sleeve 12. The lower end of the inner screw 13 extends downwardly out of the limit seat 10, and the inner screw 13 is provided with a driving section that is threadedly matched with the outer sleeve 12, and a limiting section that is slidably matched with the anti-rotation hole 11.

[0044] Specifically, the lower end of the outer sleeve 12 is arranged between the upper splint 7 and the top plate of the box body 1, and the outer sleeve 12 and the upper splint 7 are rotatably connected through a bearing; a through hole is provided on the top plate for the inner screw 13 to pass downward; the anti-rotation hole 11 is opened through the lower splint 8 and the limit seat 10 to facilitate the installation of the inner screw 13.

[0045] The outer circumference of the limiting section of the inner screw 13 is fixedly provided with spline teeth 14, and the inner circumference of the anti-rotation hole 11 is fixedly provided with a spline groove. The spline teeth 14 can cooperate with the spline groove to limit the rotation of the inner screw 13 relative to the limiting seat 10. The spline teeth 14 / groove are only one form of the limiting section and anti-rotation hole 11, and any other common anti-rotation structure can also be used.

[0046] The stop portion includes an extension arm 15 and a stop plate 16. The extension arm 15 is coaxially fixedly connected to the boom 5. The stop plate 16 is fixed to the extension arm 15. When the boom 5 is flat, the plate surface of the stop plate 16 forms a positive angle of 15 to 30 degrees with the horizontal plane, and the end of the stop plate 16 closer to the boom 5 is higher than the other end. A wear-resistant rubber pad 17 that cooperates with the stop plate 16 is provided at the lower end of the inner screw 13. The extension arm 15 is used to extend the length of the stop plate 16 so that it can further adapt to inner screws 13 of different heights. The wear-resistant rubber pad 17 can effectively extend the service life of the inner screw 13.

[0047] Working Principle: This utility model provides a pressure roller mechanism that facilitates distance control. During use, the appropriate wheel spacing (the distance between the pressure roller and the tube die, preferably 5-10 mm) is determined based on parameters such as the size of the tube die 20 to be centrifuged, the radius of the pressure roller, and the length of the swing arm. The height of the stop end is then adjusted accordingly. By rotating the outer sleeve 12, the threads within the outer sleeve 12 engage the drive section on the inner screw 13, driving the inner screw 13 up and down within the stop seat 10 until the lower end of the inner screw 13 reaches the desired height. Because the stop section of the inner screw 13 engages the spline groove in the anti-rotation hole 11, the inner screw 13 does not rotate during the up and down movement, ensuring accurate and stable adjustment.

[0048] After the limit device is adjusted, the lifting device (in this embodiment, the drive cylinder 19) is activated. The telescopic end of the drive cylinder 19 begins to extend, pushing the boom 5 upward around the hinge seat 6. Because the boom 5 is fixedly connected to the proximal end of the swing arm 3, the swing arm 3 also swings upward, driving the pressure roller 5 to rise. When the boom 5 is tilted to a certain height, the stop plate 16 in the stop portion will stop against the wear-resistant rubber pad 17 at the lower end of the inner screw 13 in the limit device, thereby limiting the further rise of the boom 5. At this time, the swing arm 3 cannot move up and down, and the pressure roller 5 reaches the set wheelbase from the pipe mold. While not in direct contact with the pipe mold, it can still serve as an effective safety to prevent the pipe mold from losing its position.

[0049] After the processing is completed, the telescopic end of the driving cylinder 19 is retracted, the movable arm 5 is tilted down, and the swing arm 3 is swung upward to return the pressing wheel 5 to the initial position. At this time, the operator can easily take out the processed pipe pile and prepare for the next round of processing.

[0050] [Example 2]

[0051] Please refer to Figure 7-8 The difference between Example 2 and Example 1 lies in the structure of the stopper. In Example 2, the stopper comprises a connecting seat 18 and a stopper plate 16. The connecting seat 18 is fixedly mounted on the upper end surface of the boom 5. The stopper plate 16 is rotatably connected to the connecting seat 18. A wear-resistant rubber pad 17 is provided at the lower end of the inner screw 13 to cooperate with the stopper plate 16. This further increases the contact area between the stopper plate 16 and the limiting end, achieving a more stable limiting effect.

[0052] The utility model is provided with a limit device coordinated with the jacking device, which can flexibly adjust the lower dead point of the movement of the swing arm 3, thereby realizing precise adjustment of the distance between the pressure wheel 4 and the pipe mold 20, avoiding the problem of continuous pressing and increased resistance between the pressure wheel and the pipe mold due to the lack of a distance control mechanism in the traditional pressure wheel mechanism, effectively reducing the operating load of the drive motor, improving the overall production efficiency, reducing the heat accumulation on the pressure wheel surface, effectively extending the service life of the pressure wheel, ensuring the uniformity and performance of the cement raw materials inside the pipe pile, and improving the quality of the finished pipe pile.

[0053] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A pressure wheel mechanism for convenient distance control, comprising: a box body having an inner cavity formed therein; A swivel seat, which is fixed on the side panel of the box; A swing arm, one end of which is rotatably connected to the swivel seat via a rotating shaft; A pressure wheel is provided at the other end of the swing arm and is rotatably connected to the swing arm through a wheel shaft; A driving mechanism is provided in the inner cavity and is capable of driving the swing arm to swing up and down around the rotating seat; It is characterized in that: the driving mechanism includes: The movable arm has one end passing through the opening provided in the side panel of the box body and is fixedly connected to the proximal end of the swing arm; A hinge seat, which is fixed between the movable arm and the bottom of the inner cavity; A lifting device is provided between the hinge seat and the movable arm, and can drive the movable arm to flip upward around the rotating seat with the hinge seat as a fulcrum; A limit device is provided at the top of the box body, with a limit end downwardly disposed in the inner cavity and capable of being adjusted up and down; The stopper is fixedly arranged at the other end of the movable arm and can stop the limit end when the movable arm is flipped up.

2. The pressure wheel mechanism for convenient distance control according to claim 1, characterized in that: The limiting device includes an upper splint arranged above the box body, a lower splint arranged in the inner cavity of the box body, and a support frame arranged between the upper splint and the lower splint and fixed to the top plate of the box body. The upper splint and the lower splint are clamped and fixed to the upper and lower sides of the support frame by fasteners passing through the top plate of the box body. A limiting seat is fixed below the lower splint, and a screw structure that cooperates with the limiting seat is provided in the support frame.

3. The pressure wheel mechanism for convenient distance control according to claim 2, characterized in that: A mounting hole is vertically provided in the middle of the upper splint, an anti-rotation hole coaxial with the mounting hole is provided in the limit seat, the screw structure includes an outer sleeve rotatably provided in the mounting hole, the inner edge of the outer sleeve is provided with a thread, an inner screw is coaxially provided on the inner side of the outer sleeve, the lower end of the inner screw extends downwardly from the limit seat, and the inner screw is provided with a driving section that cooperates with the thread of the outer sleeve, and a limiting section that slides with the anti-rotation hole.

4. The pressure wheel mechanism for convenient distance control according to claim 3, characterized in that: The outer circumference of the inner screw limiting section is fixedly provided with spline teeth, and the inner circumference of the anti-rotation hole is fixedly provided with spline grooves. The spline teeth can cooperate with the spline grooves to limit the rotation of the inner screw relative to the limiting seat.

5. The pressure wheel mechanism for convenient distance control according to claim 3, characterized in that: The stop part includes an extension arm and a stop plate. The extension arm is coaxially fixed to the movable arm as a whole. The stop plate is fixed on the extension arm. When the movable arm is placed flat, a positive angle of 15 to 30 degrees is formed between the plate surface of the stop plate and the horizontal plane. A wear-resistant rubber pad that cooperates with the stop plate is provided at the lower end of the inner screw.

6. The pressure wheel mechanism for convenient distance control according to claim 3, characterized in that: The stop portion includes a connecting seat and a stop plate. The connecting seat is fixedly installed on the upper end surface of the boom. The stop plate is rotatably connected to the connecting seat. A wear-resistant rubber pad that matches the stop plate is provided at the lower end of the inner screw.

7. The pressure wheel mechanism for convenient distance control according to claim 1, characterized in that: The jacking device is a driving cylinder or a driving oil cylinder. The fixed end of the jacking device is rotatably connected to the hinge seat, and the telescopic end of the jacking device is rotatably connected to the proximal end of the movable arm.

8. The pressure wheel mechanism for convenient distance control according to claim 2, characterized in that: The support frame is a rectangular frame structure with upper and lower openings, and the lower end surface of the support frame is fixedly connected to the top plate of the box body; the limit seat is a stepped shaft structure with a wide top and a narrow bottom, and the limit seat and the lower splint are fixedly connected as a whole.

Images