Portable steel bar bending device

Abstract

The utility model discloses a portable steel bar bending device which comprises a stress frame, a clamping plate and a main handle, a pump body is transversely installed on one side of the main handle, an auxiliary handle is hinged to one side of the top end of the pump body, connecting rods are installed at the top end and the bottom end of the pump body and connected with the stress frame through pin shafts, an ejector rod penetrating through the stress frame is arranged in the pump body, and an adjusting structure is arranged in the stress frame. Clamping plates are arranged on the two outer sides of the adjusting structure, clamping grooves, reserved grooves and locking structures are arranged in the clamping plates, the adjusting structure comprises an adjusting rocking handle, limiting grooves, forward and reverse lead screws, rod blocks, belt pulleys and the like, the adjusting rocking handle is rotated, the forward and reverse lead screws are driven to rotate through belt transmission, the rod blocks and the clamping plates are driven to move, and the limiting grooves guarantee stable movement. The device can stably adjust the distance between the clamping plates, meet the requirement for different lengths of steel bar bending or straightening, expand the operation range and solve the problem that adjustment is inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of on-site rebar bending and straightening technology, specifically a portable rebar bending device. Background Technology

[0002] With the rapid development of road construction in my country, public transportation such as subways is increasingly integrated into our daily lives. In the construction of subway retaining structure pile foundations, due to the long length of the piles, the reinforcing bars need to be fabricated in sections and transported to the site for welding. Before welding, the reinforcing bars need to be pre-bent to ensure that the axes of the two reinforcing bars are on the same straight line; after chiseling the pile head, most of the reinforcing bars in the cast-in-place piles exhibit severe bending deformation and require straightening and correction.

[0003] Traditional methods for straightening rebar at pile heads often involve manual manipulation, which is not only extremely inconvenient and inefficient, but also carries the risk of damaging the rebar's properties and affecting project quality. Furthermore, existing bending devices on the market have limitations due to fixed lengths between the clamping plates, making it difficult to meet varying length requirements for bending or straightening rebar. This inconvenience in adjustment and inability to flexibly adapt to diverse construction scenarios limits the range of bending and straightening operations, hindering the smooth progress of construction work. Therefore, developing a portable rebar bending device that solves the problems of existing technologies has become a pressing technical challenge. Utility Model Content

[0004] The purpose of this utility model is to provide a portable rebar bending device to solve the problems of cumbersome and inconvenient use mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A portable rebar bending device, comprising a support frame, a clamping plate, and a main handle. A pump body is horizontally mounted on one side of the main handle, and a secondary handle is hinged to one side of the top of the pump body. A connecting rod is mounted on the top and bottom of the pump body on one side of the secondary handle, and the support frame is vertically connected to the connecting rod on the side away from the pump body via a pin. A top rod is horizontally arranged inside the pump body, penetrating the middle position of the support frame, and an adjustment structure is provided inside the support frame. A clamping plate is provided at the upper and lower ends of the support frame on the side away from the pump body, and a clamping groove is formed at one end of one side of the clamping plate. A reserved groove is formed inside the clamping plate on the side of the clamping groove. The side plate has a locking structure inside. The adjustment structure includes an adjustment handle, a limiting groove, positive and negative lead screws, a rod block, and a pulley. There are two sets of positive and negative lead screws, which are vertically rotatably connected to both sides inside the force-bearing frame. The upper and lower ends of the positive and negative lead screws are threadedly connected to the force-bearing frame inside. One side of the rod block is welded to one side of the plate. The upper and lower ends of one side of the force-bearing frame are provided with limiting grooves that cooperate with the rod blocks. The top of the positive and negative lead screws is equipped with a pulley extending to the outside of the force-bearing frame. An adjustment handle is rotatably connected to the middle position of the top of the force-bearing frame. The lower end of the adjustment handle is provided with a transmission pulley, which is connected to the pulley via a belt.

[0006] Preferably, the width of the limiting groove matches the width of the rod block, and the limiting groove is symmetrically distributed about the vertical central axis of the force-bearing frame.

[0007] Preferably, the locking structure includes a locking handle, a locking plate, a sliding rod, a threaded rod, and a threaded block. The threaded rod is laterally rotatably connected to the inside of a retaining plate on one side of the pre-reserved slot, and a locking handle extending to the outside of the retaining plate is installed on one side of the threaded rod. A threaded block is threadedly connected to the inside of the retaining plate on the surface of the threaded rod, and a sliding rod extending into the pre-reserved slot is installed at the top and bottom of the threaded block. A locking plate is installed inside the pre-reserved slot on one side of the sliding rod.

[0008] Preferably, the locking plate is arc-shaped, and one side of the locking plate is fixedly connected to one side of the sliding rod by bolts.

[0009] Preferably, the slot is U-shaped, and the locking plate, the top rod, and the center of the slot are all in the same straight line.

[0010] Preferably, the main handle and the auxiliary handle are provided with rubber pads on the side of their surfaces away from the pump body, and the surfaces of the rubber pads are provided with friction protrusions.

[0011] Preferably, the diameter of the transmission pulley is larger than that of the belt pulley, the belt is a toothed belt, and both the transmission pulley and the belt pulley mesh with the belt for transmission.

[0012] Preferably, a positioning plate is fixed inside the pre-reserved slot, one end of the threaded rod is rotatably mounted on the positioning plate, and the other end of the threaded rod passes through the slot and is rotatably connected to the slot. The mounting rod 406 is provided with a through hole for the sliding rod to pass through.

[0013] Compared with related technologies, the portable rebar bending device provided by this utility model has the following advantages:

[0014] 1. This utility model provides a force-bearing frame, a pump body, a main handle, and an auxiliary handle. It utilizes the mechanical energy of the main handle and auxiliary handle operated by a person's hands. The mechanical energy is converted into hydraulic energy by the piston of the pump acting on the hydraulic oil. The hydraulic energy then enters the oil cylinder inside the pump body and pushes the push rod to act on the steel bar in the form of mechanical energy. The bending and straightening of the steel bar is achieved through the reaction action of the force-bearing frame and the clamping plate. It can be operated by a single person, avoiding the coordination problems of two-person operation. At the same time, since no power supply is required, it is more flexible in operation compared to electric hydraulic equipment. A single person can straighten and bend steel bars at any location and any angle by hand, making the operation more convenient and improving the practicality of the device, thus solving the problem of inconvenience in use.

[0015] 2. This utility model provides a force-bearing frame and an adjustment structure. By rotating the adjustment handle, the belt drives the pulley to rotate, which in turn causes the forward and reverse screws to rotate, moving the rod blocks and thus the clamping plates. At the same time, a limiting groove of the same width is set to limit the movement of the rod blocks, ensuring the smooth movement of the clamping plates and facilitating stable adjustment of the distance between the clamping plates. This allows it to meet different length requirements for bending or straightening steel bars, avoiding the limitations of fixed lengths between the clamping plates. This makes the bending and straightening operation range wider, facilitating the smooth progress of construction operations and solving the problem of inconvenient adjustment.

[0016] 3. This utility model provides a clamping plate, a locking structure, and a clamping groove. The rotation of the locking handle drives the threaded rod to rotate, causing the threaded block to move and driving the sliding rod to move, thereby moving the locking plate towards the reinforcing bar. At the same time, the arc-shaped locking plate can increase the contact area with the reinforcing bar, thereby improving its clamping stability and making it easier to firmly confine the reinforcing bar inside the clamping groove. This facilitates subsequent bending or straightening processes and avoids the problem of insufficient reinforcing bar diameter causing shaking during device engagement, which would affect work efficiency and, in severe cases, the accuracy of bending or straightening operations. This solves the problem of insufficient clamping stability. Attached Figure Description

[0017] Figure 1 This is a frontal cross-sectional view of the present invention.

[0018] Figure 2 This is a side cross-sectional view of the load-bearing frame of this utility model.

[0019] Figure 3 This is a side view of the structural appearance of the load-bearing frame of this utility model;

[0020] Figure 4 This is a top view cross-sectional structural diagram of the present invention;

[0021] Figure 5 This is a frontal cross-sectional view of the card plate structure of this utility model.

[0022] In the diagram: 1. Load-bearing frame; 2. Adjustment structure; 201. Adjustment handle; 202. Limiting groove; 203. Positive and negative lead screws; 204. Rod block; 205. Pulley; 206. Transmission pulley; 207. Belt; 3. Clamping plate; 4. Locking structure; 401. Locking handle; 402. Locking plate; 403. Sliding rod; 404. Threaded rod; 405. Threaded block; 406. Positioning plate; 407. Through hole; 5. Top rod; 6. Slot; 7. Pump body; 8. Main handle; 9. Rubber pad; 10. Secondary handle; 11. Connecting rod; 12. Reserved slot. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the contents disclosed below.

[0025] The following combination Figures 1 to 5 The technical solution of this utility model will be further explained.

[0026] Example 1: Please refer to Figures 1 to 5 A portable rebar bending device includes a support frame 1, a clamping plate 3, and a main handle 8. A pump body 7 is horizontally mounted on one side of the main handle 8, and a secondary handle 10 is hinged to one side of the top of the pump body 7. A connecting rod 11 is mounted on the top and bottom of the pump body 7 on one side of the secondary handle 10, and the support frame 1 is vertically connected to the connecting rod 11 on the side away from the pump body 7 by a pin. A top rod 5 is horizontally arranged inside the pump body 7, penetrating the middle position of the support frame 1. An adjustment structure 2 is arranged inside the support frame 1. A clamping plate 3 is arranged at the upper and lower ends of the support frame 1 on the side away from the pump body 7. A groove 6 is opened at one end of one side of the clamping plate 3. A reserved groove 12 is opened inside the clamping plate 3 on the side of the groove 6, and a locking structure 4 is arranged inside the clamping plate 3 on the side of the reserved groove 12.

[0027] Rubber pads 9 are provided on the side of the main handle 8 and the auxiliary handle 10 away from the pump body 7, and the surface of the rubber pads 9 is provided with friction protrusions.

[0028] Specifically, such as Figure 1 and Figure 4 As shown, during operation, simply applying force with both hands to the main and auxiliary handles transmits mechanical energy to the pump body 7. The pump's plunger then acts on the hydraulic oil, converting mechanical energy into hydraulic energy. Subsequently, the hydraulic energy enters the internal cylinder through the pump body 7, where it is converted back into mechanical energy, pushing the push rod 5 to act on the reinforcing bar. Simultaneously, the reaction force from the force-bearing frame 1 and the clamping plate 3 completes the bending and straightening of the reinforcing bar. The entire process can be easily completed by a single person, making it simple and efficient. Compared to electro-hydraulic equipment, it offers greater operational flexibility. The inclusion of a rubber pad 9 facilitates hand pressure application and reduces the possibility of slippage; its structural principle is based on existing technology.

[0029] The adjustment structure 2 includes an adjustment handle 201, a limiting groove 202, a positive and negative lead screw 203, a rod block 204, and a pulley 205. The positive and negative lead screw 203 is vertically rotatably connected to the middle position of both ends inside the force frame 1. The upper and lower ends of the positive and negative lead screw 203 are threadedly connected to the inside of the force frame 1. One side of the rod block 204 is welded to one side of the clamping plate 3. The upper and lower ends of one side of the force frame 1 are provided with limiting grooves 202 that cooperate with the rod block 204. The top of the positive and negative lead screw 203 is equipped with a pulley 205 extending to the outside of the force frame 1. The adjustment handle 201 is rotatably connected to the middle position of the top of the force frame 1. The lower end of the surface of the adjustment handle 201 is provided with a transmission pulley 206. The transmission pulley 206 is connected to the pulley 205 through a belt 207.

[0030] The diameter of the transmission pulley 206 is larger than that of the pulley 205, so that it is in a tensioned state. The belt 207 is a toothed belt 207. Both the transmission pulley 206 and the pulley 205 mesh with the belt 207 for transmission, making the transmission structure more stable.

[0031] The width of the limiting groove 202 is equal to the width of the rod block 204, and the limiting groove 202 is symmetrically distributed about the vertical central axis of the force-bearing frame 1;

[0032] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, by adjusting the rotation of the crank handle 201, the belt 207 drives the pulley 205 to rotate, which in turn causes the forward and reverse screws 203 to rotate, driving the rod block 204 to move, and thus the clamping plate 3 to move. At the same time, a limiting groove 202 of the same width is set to limit the movement of the rod block 204, ensuring the smooth movement of the clamping plate 3 and facilitating stable adjustment of the distance between the clamping plates 3, so as to meet the different length requirements for bending or straightening the steel bars, and avoid the limitation of fixed length between the clamping plates 3.

[0033] The locking structure 4 includes a locking handle 401, a locking plate 402, a sliding rod 403, a threaded rod 404, and a threaded block 405. The threaded rod 404 is laterally rotatably connected to the inside of the retaining plate 3 on one side of the reserved slot 12, and a locking handle 401 extending to the outside of the retaining plate 3 is installed on one side of the threaded rod 404. The threaded block 405 is threadedly connected to the inside of the retaining plate 3 on the surface of the threaded rod 404, and a sliding rod 403 extending into the inside of the reserved slot 12 is installed at the top and bottom of the threaded block 405. A locking plate 402 is installed inside the reserved slot 12 on one side of the sliding rod 403.

[0034] A positioning plate 406 is fixed inside the retaining slot 12 and the positioning plate 406 is rotatably mounted on the positioning plate 406. The other end of the threaded rod 404 passes through the retaining plate 3 and is rotatably connected to the retaining plate 3. The mounting rod 406 is provided with a through hole 407 for the sliding rod 403 to pass through, which further improves stability.

[0035] The locking plate 402 is arc-shaped, and one side of the locking plate 402 is fixedly connected to one side of the sliding rod 403 by bolts;

[0036] The slot 6 is U-shaped, and the centers of the locking plate 402, the push rod 5, and the slot 6 are all in the same straight line;

[0037] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the rotation of the locking handle 401 drives the threaded rod 404 to rotate, which in turn moves the threaded block 405 and the sliding rod 403, thereby causing the locking plate 402 to move towards the reinforcing bar. At the same time, the arc-shaped locking plate 402 can increase the contact area with the reinforcing bar, thereby improving its clamping stability and making it easier to firmly fix the reinforcing bar inside the slot 6. This facilitates subsequent bending or straightening and avoids the reinforcing bar diameter being too small, which would cause the device to shake when locking and thus affect work efficiency.

[0038] Working principle: When using this device;

[0039] Implementation steps for the first innovation point:

[0040] Step 1: Rotate the adjusting handle 201, which drives the pulley 205 to rotate via the belt 207, thereby causing the forward and reverse lead screw 203 to rotate accordingly;

[0041] Step 2: Utilize the threaded engagement between the positive and negative lead screws 203 and the lever block 204 to move the lever block 204 and drive the movement of the clamping plate 3;

[0042] Step 3: Simultaneously set limit grooves 202 of the same width to limit the movement of the rod block 204, ensuring the smooth movement of the clamping plate 3 and facilitating stable adjustment of the distance between the clamping plates 3 to meet different length requirements for bending or straightening the reinforcing bars.

[0043] Then, slot 6 is inserted into the steel bar that needs to be installed;

[0044] Implementation steps for the second innovation point:

[0045] Step 1: Rotate the locking handle 401 to drive the threaded rod 404 to rotate. Utilize the threaded engagement between the threaded rod 404 and the threaded block 405 to move the threaded block 405, thereby moving the sliding rod 403 and causing the locking plate 402 to move towards the reinforcing bar.

[0046] Step 2: At the same time, the arc-shaped locking plate 402 can increase the contact area with the steel bar, thereby improving its clamping stability and making it easier to firmly fix the steel bar inside the slot 6, which is convenient for subsequent bending or straightening.

[0047] The third innovation point implementation steps:

[0048] Step 1: Mechanical energy is applied to the main handle 8 and the auxiliary handle 10 by human hands, and then transferred to the hydraulic oil through the plunger of the pump, thus converting mechanical energy into hydraulic energy.

[0049] Step 2: Then the hydraulic energy enters the oil cylinder inside the pump body 7 through the pump body 7, and pushes the push rod 5 to act on the steel bar in the form of mechanical energy;

[0050] The third step involves using the reaction force of the support frame 1 and the clamping plate 3 to bend and straighten the reinforcing bars, which is more flexible and efficient.

[0051] Step 4: The two-stage oil inlet system makes the work lighter and faster, and the main handle 8 and auxiliary handle 10 can flexibly relieve pressure, allowing for quick reset in any position and improving work efficiency.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A portable rebar bending device, comprising a support frame (1), a clamping plate (3), and a main handle (8), wherein a pump body (7) is horizontally mounted on one side of the main handle (8), and a secondary handle (10) is hinged to one side of the top of the pump body (7), a connecting rod (11) is mounted on the top and bottom of the pump body (7) on one side of the secondary handle (10), and the support frame (1) is vertically pinned to the side of the connecting rod (11) away from the pump body (7), and a top rod (5) is horizontally arranged inside the pump body (7) on one side, penetrating the middle position of the support frame (1), characterized in that: The force-bearing frame (1) is provided with an adjustment structure (2). The upper and lower ends of the force-bearing frame (1) away from the pump body (7) are provided with a retaining plate (3). One end of the retaining plate (3) is provided with a retaining groove (6). The retaining plate (3) on the side of the retaining groove (6) is provided with a reserved groove (12). The retaining plate (3) on the side of the reserved groove (12) is provided with a locking structure (4). The adjustment structure (2) includes an adjustment handle (201), a limiting groove (202), a positive and negative lead screw (203), a rod block (204), and a pulley (205). There are two sets of positive and negative lead screws (203). The two sets of positive and negative lead screws (203) are vertically rotatably connected inside the force-bearing frame (1). On both sides of the part, and the upper and lower ends of the force frame (1) of the positive and negative screw (203) are threaded with rod blocks (204). One side of the rod block (204) is welded to one side of the clamping plate (3). The upper and lower ends of one side of the force frame (1) are provided with limiting grooves (202) for the rod block (204) to slide. The top of the positive and negative screw (203) is equipped with a pulley (205) extending to the outside of the force frame (1). An adjusting handle (201) is rotatably connected at the middle position of the top of the force frame (1). A transmission pulley (206) is provided at the lower end of the surface of the adjusting handle (201). The transmission pulley (206) is connected to the pulley (205) through a belt (207).

2. The portable rebar bending device according to claim 1, characterized in that: The width of the limiting groove (202) matches the width of the rod block (204), and the limiting groove (202) is symmetrically distributed about the vertical central axis of the force-bearing frame (1).

3. The portable rebar bending device according to claim 2, characterized in that: The locking structure (4) includes a locking handle (401), a locking plate (402), a sliding rod (403), a threaded rod (404), and a threaded block (405). The threaded rod (404) is laterally rotatably connected to the inside of the retaining plate (3) on one side of the reserved slot (12), and a locking handle (401) extending to the outside of the retaining plate (3) is installed on one side of the threaded rod (404). The threaded block (405) is threadedly connected inside the retaining plate (3) on the surface of the threaded rod (404), and a sliding rod (403) that can extend into the inside of the reserved slot (12) is installed at the top and bottom of the threaded block (405). A locking plate (402) is installed on one side of the sliding rod (403).

4. The portable rebar bending device according to claim 3, characterized in that: The locking plate (402) is arc-shaped, and one side of the locking plate (402) is fixedly connected to one side of the sliding rod (403) by bolts.

5. The portable rebar bending device according to claim 3, characterized in that: The slot (6) is U-shaped, and the center of the locking plate (402), the top rod (5) and the slot (6) are all in the same straight line.

6. A portable rebar bending device according to claim 4 or 5, characterized in that: The main handle (8) and the auxiliary handle (10) are provided with rubber pads (9) on the side of their surfaces away from the pump body (7), and the surfaces of the rubber pads (9) are provided with friction protrusions.

7. The portable rebar bending device according to claim 6, characterized in that: The diameter of the transmission pulley (206) is larger than that of the pulley (205), and the belt (207) is a toothed belt (207). Both the transmission pulley (206) and the pulley (205) mesh with the belt (207) for transmission.

8. The portable rebar bending device according to claim 7, characterized in that: A positioning plate (406) is fixed inside the retaining slot (12) and the threaded rod (404) is rotatably mounted on the positioning plate (406). The other end of the threaded rod (404) passes through the retaining plate (3) and is rotatably connected to the retaining plate (3). The mounting rod (406) is provided with a through hole (407) for the sliding rod (403) to pass through.

Images