Simple bending mechanism suitable for thin steel bars

Abstract

The utility model discloses a simple bending mechanism suitable for thin steel bars, which relates to the technical field of bending devices and comprises a base, a support column, an ejector rod, a sliding seat, a first guide pulley, a hinge rod, a lifting seat, a second guide pulley, a fixed cylinder, a sliding column and an elastic reset unit. The driving mechanism is used for driving the sliding column to move upwards; and the bending unit is arranged on the ejector rod and corresponds to the second guide pulley. According to the steel bar bending device, the two first guide pulleys are arranged, a thin steel bar is placed in pulley grooves of the first guide pulleys, then the thin steel bar is bent through the bending unit, the two first guide pulleys are made to be close to each other along with bending of the steel bar, and after bending is completed, the lifting base is driven by the elastic reset unit to move upwards to reset. Compared with a large bending machine in the prior art, the bending machine is simple in structure, low in cost and small in occupied construction site area.

Description

Technical Field

[0001] This utility model relates to the field of bending device technology, specifically a simple bending mechanism suitable for thin steel bars. Background Technology

[0002] During construction, a large amount of steel reinforcement is used. However, due to different construction environments and varying building sizes, it is often necessary to bend the steel reinforcement on-site to ensure the smooth progress of construction. Currently, steel reinforcement is bent manually using pliers or wrenches. However, the short length of pliers or wrenches results in a small lever arm for bending the steel reinforcement, and manual bending often consumes a lot of strength, thus affecting the construction process. Transporting large steel reinforcement bending equipment to the construction site often increases construction costs and occupies space, which is also detrimental to the construction process.

[0003] Therefore, this application proposes a simple bending mechanism suitable for thin steel bars. Utility Model Content

[0004] The purpose of this invention is to provide a simple bending mechanism suitable for thin steel bars, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a simple bending mechanism suitable for thin steel bars, comprising a base and two support columns fixedly connected to the base, wherein a top rod is fixedly connected to the upper end of the two support columns, and further comprising:

[0006] The sliding seat has two parts, which are respectively sleeved on both ends of the top rod. The sliding seat slides freely on the top rod, and a first guide pulley is rotatably connected to the sliding seat.

[0007] Two hinge rods are provided, and one end of the hinge rod in the length direction is respectively hinged to the two sliding seats;

[0008] A lifting seat is hinged to one end of the two hinge rods away from the sliding seat, and a second guide pulley is rotatably connected to the lifting seat.

[0009] A fixed cylinder, which is vertically fixed to the base;

[0010] A sliding column, which is telescopically inserted into the fixed cylinder, and the upper end of the sliding column is fixedly connected to the lifting seat;

[0011] An elastic reset unit is disposed inside the fixed cylinder and is used to drive the sliding column to move upward.

[0012] A bending unit is provided on the top rod and corresponds to the second guide pulley.

[0013] Furthermore, the bending unit includes a cylinder vertically mounted on the top rod, and a bending block is connected to the cylinder rod of the cylinder.

[0014] Furthermore, the elastic reset unit includes:

[0015] A first spring is vertically installed inside the fixed cylinder, and the first spring generates an upward elastic resisting force on the lower end of the sliding column;

[0016] A limiting post is provided, which passes through the lower end of the sliding post, and the fixed cylinder has an oblong hole for the limiting post to pass freely, the length direction of the oblong hole being parallel to the axial direction of the fixed cylinder.

[0017] Furthermore, the support column is provided with two U-shaped brackets, a sliding rod is horizontally inserted through the U-shaped brackets, a connecting frame is provided on the sliding rod, a striking rod is provided on the connecting frame, and a reciprocating drive unit is provided on the U-shaped brackets. The reciprocating drive unit is used to drive the sliding rod to reciprocate horizontally when the limiting column moves up and down.

[0018] Furthermore, the reciprocating drive unit includes:

[0019] A rotating cylinder, which is fitted onto the fixed cylinder and rotatably connected to the fixed cylinder;

[0020] A rotating disk is coaxially sleeved on the rotating cylinder, and the rotating disk has multiple notches and grooves around its periphery;

[0021] A roller, which is rotatably connected to one end of the sliding rod facing the rotating disk;

[0022] A stop structure is provided on the sliding rod and is used to drive the sliding rod to move toward the rotating disk, so that the roller alternately rolls on the periphery of the rotating disk and the inner wall of the notch groove when the rotating disk rotates;

[0023] A rotating structure is provided on the rotating cylinder, and drives the rotating cylinder to rotate when the limiting post moves up and down.

[0024] Furthermore, the notch groove has inclined surfaces on its inner walls on both sides.

[0025] Furthermore, the abutment structure includes:

[0026] A limiting ring is sleeved on one end of the sliding rod adjacent to the roller;

[0027] The second spring is wrapped around the sliding rod, and its two ends elastically abut against the limiting ring and the U-shaped bracket, respectively, in the direction of the elastic force.

[0028] Furthermore, the rotating structure includes a ball that is rotatably fitted into one end of the limiting post and protruding from the waist-shaped hole. The inner wall of the rotating cylinder is provided with a spiral groove for the ball to engage, and the ball rolls freely in the spiral groove.

[0029] Furthermore, the plurality of said notches are arranged in an array along the axial direction of the rotating disk.

[0030] Furthermore, a stop ring is fitted onto the end of the sliding rod away from the rotating disk.

[0031] Compared with the prior art, the beneficial effects of this utility model are:

[0032] This utility model sets up two first guide pulleys, places the thin steel bar in the pulley groove of the first guide pulley, and then bends the thin steel bar through the bending unit, so that the two first guide pulleys move closer to each other as the steel bar is bent. After bending is completed, the lifting seat is driven to move upward and reset through the elastic reset unit. Compared with the large bending machine in the prior art, the structure is simpler, the cost is lower, and the construction site area occupied is smaller.

[0033] This invention uses a sliding column to extend and retract within a fixed cylinder, thereby guiding the vertical movement of the lifting seat and preventing it from shifting during bending, which would affect the bending angle.

[0034] This invention utilizes the horizontal reciprocating movement of the sliding column to allow the striking rod to reciprocate striking of the thin steel bar. When the diameter of the thin steel bar is slightly larger than the inner diameter of the pulley groove on the first guide pulley and / or the second guide pulley, the thin steel bar is subjected to continuous striking force during bending. This prevents the thin steel bar from being interfered with by the inner wall of the pulley groove during bending, thus allowing the thin steel bar to be guided and locked into the pulley groove. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a simple bending mechanism for thin steel bars according to this utility model;

[0036] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0037] Figure 3 for Figure 1 A top-view diagram of the mid-structure;

[0038] Figure 4 for Figure 1A schematic diagram of the central structure from the front view angle;

[0039] Figure 5 for Figure 1 A side view diagram of the mid-structure;

[0040] Figure 6 for Figure 1 A cross-sectional view of the middle section of the structure;

[0041] Figure 7 for Figure 6 Enlarged schematic diagram of the local structure at point A;

[0042] Figure 8 This is a schematic diagram of the rotating cylinder in this invention.

[0043] The following are explanations of the reference numerals in the figures: 1. Fixed cylinder; 2. Base; 3. Rotating cylinder; 4. U-shaped bracket; 5. Rotating disk; 6. Support column; 7. Sliding column; 8. First guide pulley; 9. Sliding seat; 10. Hinge rod; 11. Bending block; 12. Cylinder; 13. Top rod; 14. Second guide pulley; 15. Striking rod; 16. Connecting frame; 17. Sliding rod; 18. Second spring; 19. Lifting seat; 20. First spring; 21. Inclined surface; 22. Notch groove; 23. Limiting ring; 24. Roller; 25. Ball bearing; 26. Spiral groove; 27. Waist-shaped hole; 28. Limiting column. Detailed Implementation

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Please see Figures 1-8This utility model provides a technical solution: a simple bending mechanism suitable for thin steel bars, including a base 2 and two support columns 6 fixed to the base 2. A top rod 13 is fixedly connected to the upper end of the two support columns 6. Multiple casters or directional wheels can be installed on the bottom of the base 2 for easy movement. A reinforcing rod extending to the support columns 6 is welded onto the base 2. The top rod 13 has a rectangular longitudinal section, and sliding seats 9 are sleeved at both ends along its length. The sliding seats 9 slide freely horizontally on the top rod 13. Each of the two sliding seats 9 is rotatably connected to a first guide pulley 8 on the same side via a bearing seat. The thin steel bar is placed on the pulley groove of the first guide pulley 8, thereby bending the thin steel bar... The reinforcing bars are used for positioning. Each of the two sliding seats 9 is hinged to a hinge rod 10 at its bottom. The ends of the two hinge rods 10 away from the sliding seats 9 are hinged to a lifting seat 19. The lifting seat 19 is rotatably connected to a second guide pulley 14 through a bearing seat. The second guide pulley 14 is located in the middle of the two first guide pulleys 8. In addition, the pulley grooves of the first guide pulley 8 and the second guide pulley 14 are on the same vertical plane. A cylinder bracket is welded on the top rod 13. A cylinder 12 is vertically mounted on the cylinder bracket. The cylinder rod of the cylinder 12 is threadedly connected to a bending block 11. The bending block 11 has a trapezoidal structure that is wider at the top and narrower at the bottom, and the tip of the bending block 11 corresponds to the second guide pulley 14.

[0046] The thin steel bar is placed flat in the pulley grooves of the two first guide pulleys 8. Then, the cylinder 12 is activated, the cylinder rod of the cylinder 12 extends, and drives the bending block 11 to move downward. When the bending block 11 moves downward, the tip of the bending block 11 will press against the middle of the thin steel bar, and then the middle of the thin steel bar will start to move downward, thus causing the thin steel bar to begin to bend in a U-shape. The bent part of the thin steel bar is stuck in the pulley groove of the second guide pulley 14. Then, as the cylinder rod of the cylinder 12 continues to extend downward, the second guide pulley 14 will move downward, causing the hinge rod 10 to drive the sliding seat 9 to move closer to the bending block 11, thus causing the two sliding seats 9 to move closer to each other, and causing the first guide pulley 8 to squeeze the thin steel bar, thereby realizing the U-shaped bending of the thin steel bar.

[0047] A fixed cylinder 1 is vertically welded to the base 2, and a sliding column 7 is vertically welded to the bottom surface of the lifting seat 19. The lower end of the sliding column 7 is telescopically inserted into the fixed cylinder 1. In this way, when the lifting seat 19 is bent, the telescopic insertion of the sliding column 7 into the fixed cylinder 1 guides and limits the up and down movement of the lifting seat 19, preventing the lifting seat 19 from swaying during bending. In addition, a first spring 20 is vertically installed inside the fixed cylinder 1. The first spring 20 generates an upward elastic resisting force on the lower end of the sliding column 7. Furthermore, a limiting column 28 is provided at the lower end of the sliding column 7 (the end that penetrates into the fixed cylinder 1). An oblong hole 27 is provided on the outer wall of the fixed cylinder 1 for the limiting column 28 to be inserted. The limiting column 28 slides freely up and down in the oblong hole 27. In addition, the length direction of the oblong hole 27 is parallel to the axial direction of the fixed cylinder 1.

[0048] Two U-shaped brackets 4 are welded onto the support column 6. The two U-shaped brackets 4 are symmetrically arranged along the axial direction of the fixed cylinder 1. In addition, a sliding rod 17 is horizontally inserted through the U-shaped bracket 4. The sliding rod 17 slides freely horizontally on the U-shaped bracket 4. A connecting frame 16 is welded to the sliding rod 17 away from the fixed cylinder 1. A crossbar is welded to the upper end of the connecting frame 16. The length direction of the crossbar is parallel to the length direction of the top rod 13. A connecting rod is horizontally welded to each end of the crossbar. A striking rod 15 is vertically welded to the end of the connecting rod away from the crossbar. A rotating cylinder 3 is fitted onto the fixed cylinder 1 and is rotatably connected to the fixed cylinder 1. A rotating cylinder is coaxially sleeved on the rotating cylinder 3. The rotating disk 5 has multiple notches and slots 22 arranged in an array along the axial direction of the rotating disk 5. The notches and slots 22 have inclined surfaces 21 on their inner walls on opposite sides. The sliding rod 17 is rotatably connected to a roller 24 at one end facing the rotating disk 5. A limit ring 23 is sleeved on one end of the sliding rod 17 adjacent to the roller 24. A second spring 18 is wound around the sliding rod 17. The two ends of the second spring 18 elastically abut against the limit ring 23 and the U-shaped bracket 4 respectively in the direction of the elastic force. A ball 25 is rotatably embedded at one end of the limit post 28 that passes through the waist-shaped hole 27. A spiral groove 26 is opened on the inner wall of the rotating cylinder 3 for the ball 25 to engage. The ball 25 rolls freely in the spiral groove 26.

[0049] When the sliding column 7 slides and extends within the fixed cylinder 1, the limiting column 28 moves up and down synchronously within the oblong hole 27. This causes the ball bearing 25 on the limiting column 28 to roll within the spiral groove 26 of the rotating cylinder 3. Subjected to the squeezing force of the inner wall of the spiral groove 26, the ball bearing 25 drives the rotating cylinder 3 to rotate. As the rotating cylinder 3 rotates, the rotating disk 5 rotates circumferentially. The second spring 18 provides elastic support to the limiting ring 23, causing the roller 24 to roll from the periphery of the rotating disk 5 into the notch 22. Then, the elastic potential energy of the second spring 18 is released, driving the limiting ring 23 to move rapidly towards the rotating disk 5. This causes the sliding rod 17 to drive the connecting frame 16 and the striking rod 15 towards the thin steel bar. The striking rod 15 then generates a striking force on the thin steel bar from two opposite directions. Under the action of the striking vibration, the thin steel bar can be bent. The process is guided to prevent the thin steel bar from being subjected to continuous impact force during bending when the diameter of the thin steel bar is slightly larger than the inner diameter of the pulley groove on the first guide pulley 8 and / or the second guide pulley 14. This ensures that the thin steel bar is not interfered with by the inner wall of the pulley groove during bending, thus allowing the thin steel bar to be guided and engaged in the pulley groove. Then, as the rotating disk 5 rotates, the roller 24 rolls and contacts the inclined surface 21. Under the squeezing force of the inclined surface 21, the sliding rod 17 slides away from the rotating disk 5, causing the second spring 18 to compress and accumulate elastic potential energy. In addition, a stop ring is sleeved on the end of the sliding rod 17 away from the rotating disk 5. The stop ring limits the movement of the sliding rod 17 towards the rotating disk 5, so that when the rotating disk 5 rotates, the roller 24 can smoothly contact the inclined surface 21 and roll in contact with the inclined surface 21.

[0050] The working principle of this utility model is as follows: A thin steel bar is placed flat in the pulley grooves of two first guide pulleys 8. Then, the cylinder 12 is activated, the cylinder rod of the cylinder 12 extends, and drives the bending block 11 to move downward. When the bending block 11 moves downward, the tip of the bending block 11 will press against the middle of the thin steel bar, and then the middle of the thin steel bar will start to move downward, thereby causing the thin steel bar to begin to bend in a U-shape. The bent part of the thin steel bar is stuck in the pulley groove of the second guide pulley 14. Then, as the cylinder rod of the cylinder 12 continues to extend downward, the second guide pulley 14 will move downward, causing the hinge rod 10 to drive the sliding seat 9 to move closer to the bending block 11, thereby causing the two sliding seats 9 to move closer to each other, and causing the first guide pulley 8 to squeeze the thin steel bar, thus realizing the U-shaped bending of the thin steel bar.

[0051] When the sliding column 7 slides and extends within the fixed cylinder 1, the limiting column 28 moves up and down synchronously within the oblong hole 27. This causes the ball bearing 25 on the limiting column 28 to roll within the spiral groove 26 of the rotating cylinder 3. Subjected to the squeezing force of the inner wall of the spiral groove 26, the ball bearing 25 drives the rotating cylinder 3 to rotate. As the rotating cylinder 3 rotates, the rotating disk 5 rotates circumferentially. The second spring 18 provides elastic support to the limiting ring 23, causing the roller 24 to roll from the periphery of the rotating disk 5 into the notch 22. Then, the elastic potential energy of the second spring 18 is released, driving the limiting ring 23 to move rapidly towards the rotating disk 5. This, in turn, causes the sliding rod 17 to drive the connecting frame 16 and the striking rod 15 towards the thin steel bar. The movement causes the striking rod 15 to strike the thin steel bar from two opposite directions. Under the action of the striking vibration, the bending process of the thin steel bar can be guided, avoiding the continuous striking force on the thin steel bar when the diameter of the thin steel bar is slightly larger than the inner diameter of the pulley groove on the first guide pulley 8 and / or the second guide pulley 14. This prevents the thin steel bar from being interfered with by the inner wall of the pulley groove during bending, thus allowing the thin steel bar to be guided and locked in the pulley groove. Then, as the rotating disk 5 rotates, the roller 24 rolls and contacts the inclined surface 21. Under the squeezing force of the inclined surface 21, the sliding rod 17 slides away from the rotating disk 5, causing the second spring 18 to compress and accumulate elastic potential energy.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple bending mechanism for thin steel bars, comprising a base (2) and two support columns (6) fixedly connected to the base (2), wherein a top rod (13) is fixedly connected to the upper end of the two support columns (6), characterized in that, Also includes: Sliding seat (9), two sliding seats (9) are provided and respectively sleeved on both ends of the top rod (13). The sliding seat (9) slides freely on the top rod (13). A first guide pulley (8) is rotatably connected to the sliding seat (9). Two hinge rods (10) are provided, and one end of each hinge rod in the length direction is respectively hinged to the two sliding seats (9); The lifting seat (19) is hinged to one end of the two hinge rods (10) away from the sliding seat (9), and a second guide pulley (14) is rotatably connected to the lifting seat (19). A fixed cylinder (1) is vertically fixed to the base (2); The sliding column (7) is telescopically inserted into the fixed cylinder (1), and the upper end of the sliding column (7) is fixedly connected to the lifting seat (19); An elastic reset unit is disposed inside the fixed cylinder (1) and is used to drive the sliding column (7) to move upward. A bending unit is provided on the top rod (13) and corresponds to the second guide pulley (14).

2. The simple bending mechanism for thin steel bars according to claim 1, characterized in that, The bending unit includes a cylinder (12) vertically mounted on the top rod (13), and a bending block (11) is connected to the cylinder rod of the cylinder (12).

3. The simple bending mechanism for thin steel bars according to claim 1, characterized in that, The elastic reset unit includes: The first spring (20) is vertically installed inside the fixed cylinder (1), and the first spring (20) generates an upward elastic resisting force on the lower end of the sliding column (7); A limiting post (28) is inserted through the lower end of the sliding post (7), and the fixed cylinder (1) has an oblong hole (27) for the limiting post (28) to pass freely. The length direction of the oblong hole (27) is parallel to the axial direction of the fixed cylinder (1).

4. The simple bending mechanism for thin steel bars according to claim 3, characterized in that, The support column (6) is provided with two U-shaped brackets (4), and a sliding rod (17) is horizontally inserted through the U-shaped bracket (4). A connecting frame (16) is provided on the sliding rod (17), and a striking rod (15) is provided on the connecting frame (16). A reciprocating drive unit is provided on the U-shaped bracket (4). The reciprocating drive unit is used to drive the sliding rod (17) to reciprocate horizontally when the limiting column (28) moves up and down.

5. The simple bending mechanism for thin steel bars according to claim 4, characterized in that, The reciprocating drive unit includes: Rotating cylinder (3), which is fitted onto the fixed cylinder (1) and is rotatably connected to the fixed cylinder (1); A rotating disk (5) is coaxially sleeved on the rotating cylinder (3), and the rotating disk (5) has multiple notches (22) on its periphery; Roller (24), the roller (24) is rotatably connected to one end of the sliding rod (17) facing the rotating disk (5); A push-off structure is provided on the sliding rod (17) and is used to drive the sliding rod (17) to move toward the rotating disk (5), so that the roller (24) alternately rolls on the periphery of the rotating disk (5) and the inner wall of the notch (22) when the rotating disk (5) rotates; A rotating structure is provided on the rotating cylinder (3), and drives the rotating cylinder (3) to rotate when the limiting post (28) moves up and down.

6. The simple bending mechanism for thin steel bars according to claim 5, characterized in that, The notch (22) has inclined surfaces (21) on its inner walls on both sides.

7. The simple bending mechanism for thin steel bars according to claim 5, characterized in that, The abutment structure includes: A limiting ring (23) is sleeved on one end of the sliding rod (17) adjacent to the roller (24); The second spring (18) is wrapped around the sliding rod (17), and its two ends elastically abut against the limiting ring (23) and the U-shaped bracket (4) respectively in the direction of elastic force.

8. The simple bending mechanism for thin steel bars according to claim 5, characterized in that, The rotating structure includes a ball (25) that is rotatably fitted into the limiting post (28) and passes through one end of the waist-shaped hole (27). The inner wall of the rotating cylinder (3) is provided with a spiral groove (26) for the ball (25) to engage. The ball (25) rolls freely in the spiral groove (26).

9. The simple bending mechanism for thin steel bars according to claim 5, characterized in that, The plurality of notches (22) are arranged in an array along the axial direction of the rotating disk (5).

10. The simple bending mechanism for thin steel bars according to any one of claims 5-9, characterized in that, A stop ring is fitted onto the end of the sliding rod (17) away from the rotating disk (5).

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