A hand bending tool

Abstract

The utility model relates to the technical field of flat steel bending, specifically is a kind of manual bending tool. The bearing cooperation connecting column of groove board subassembly realizes groove board angle free adjustment, and using positioning rod and the positioning hole thread fixing on operation platform, different bending angle demand can be quickly adapted;Meanwhile, extrusion subassembly adopts pure mechanical transmission structure, and the torque rod limiting by rotating block drives connecting block, mounting seat and pressure head linkage to press down, completely discard jack structure, avoid its long-term maintenance and high cost defect.Pressure head realizes transverse sliding dismounting by the sliding slot of mounting seat side, and limit hole cooperation limit rod is inserted and fixed by using the limit hole formed by the contact section of sliding slot and pressure head, and the friction anti-loose characteristic of rubber sleeve is matched, three-step replacement mechanism is formed, i.e. sliding alignment, rod limiting, rubber anti-loose, compared with traditional bolt fixing mode, simplify operation process, significantly improve mould replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flat steel bending technology, specifically a manual bending tool. Background Technology

[0002] Bending is a crucial step in sheet metal processing, and bending machines are essential equipment in the sheet metal industry for bending and shaping workpieces. Their function is to press flat steel into various shapes according to process requirements. Bending machines are relatively expensive, and small-scale steel structure processing plants that do not own bending equipment often need to outsource production, increasing their costs.

[0003] In the prior art, such as in publication number CN220371954U, a manual flat steel bending device is disclosed. It includes a workbench, manual jacks, and bending cutters. Two vertical H-beams are welded to one side of the workbench off-center as pillars. An H-beam is horizontally welded between the tops of the two pillars as a crossbeam. An H-beam is horizontally welded between the bottoms of the two pillars as a support beam. Three manual jacks are installed at the bottom of the support beam. An upper die connector is installed at the top of each manual jack. A bending cutter upper die is slidably connected within the upper die connector. The bending cutter upper die is fixed to the upper die connector using hexagonal head bolts. A lower die connector is fixed to the top of the support beam using bolts and nuts. A bending cutter lower die is installed at the top of the lower die connector. This invention has low manufacturing cost, simple and reliable structure, and can meet production needs without adding a bending machine, saving costs and creating economic benefits.

[0004] Although the aforementioned patent can reduce the cost of bending machines through the design of jacks, using jacks as bending tools still requires maintenance and upkeep after long-term use, and the angle of the bending die cannot be quickly adjusted, making it impractical. At the same time, the operation of changing bending dies is cumbersome, with many steps, which affects processing efficiency.

[0005] Therefore, this utility model provides a manual bending tool. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a manual bending tool, which solves the problems of using a jack as a bending tool, which still requires maintenance after long-term use and cannot quickly adjust the angle of the bending die, making it impractical; at the same time, the operation of changing the bending die is cumbersome and involves many steps, affecting processing efficiency.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a manual bending tool, including an operating table, a grooved plate assembly fixedly connected to one end of the top surface of the operating table in an axisymmetric manner, a rotating block fixedly connected to the top surface of the operating table, and an extrusion assembly sleeved inside the rotating block;

[0008] The slot plate assembly includes a bearing fixedly connected to the top surface of the operating table in an axisymmetric manner. A connecting column is sleeved inside the bearing. A slot plate is fixedly connected to the top of the connecting column. An insertion hole is opened on the top surface of the slot plate. A positioning rod is inserted into the insertion hole. A plurality of positioning holes are opened in an axisymmetric manner on the top surface of the operating table. The bottom end of the positioning rod is threaded into the inside of the positioning hole.

[0009] The extrusion assembly includes a torque rod sleeved inside the rotating block. One end of the torque rod is fixedly connected to a rotatable connecting block. A mounting base is fixedly connected to the side of the connecting block. A sliding groove is provided on the side of the mounting base. A pressure head is slidably connected to the side of the mounting base through the sliding groove. A limiting hole is provided at the contact section between the sliding groove and the pressure head. Half of the limiting hole is located in the sliding groove, and the other half is located at one end of the pressure head. A limiting rod is inserted into the limiting hole, and a rubber sleeve is fitted onto the surface of the limiting rod.

[0010] Preferably, the slot plate of the slot plate assembly is rotatably mounted on the operating table via connecting columns and bearings.

[0011] Preferably, the angle of the slot plate is fixed by inserting a positioning rod into its insertion hole and threading it into the corresponding positioning hole on the top surface of the operating table.

[0012] Preferably, the torque rod of the extrusion assembly is limited by a rotating block and can rotate on the operating table, and the torque rod drives the mounting base to move through a connecting block.

[0013] Preferably, the pressure head is slidably mounted on the side of the mounting base via a groove, and is limited and fixed by a limiting rod inserted into a limiting hole.

[0014] Preferably, the limiting hole formed by the contact section between the chute and the pressure head is jointly formed by the sidewall of the chute and the sidewall of the pressure head.

[0015] Beneficial effects

[0016] This invention provides a manual bending tool. Compared with the prior art, it has the following advantages:

[0017] 1. This manual bending tool allows for free adjustment of the slot plate angle through the bearing and connecting column of the slot plate assembly, and is fixed by the positioning rod and the positioning hole on the operating table, which can quickly adapt to different bending angle requirements. At the same time, the extrusion assembly adopts a pure mechanical transmission structure, which drives the connecting block, mounting base and pressure head to press down in linkage through the torque rod of the rotating block limit, completely eliminating the jack structure and avoiding its defects of long-term maintenance and high cost.

[0018] 2. This manual bending tool allows the pressure head to slide laterally for assembly and disassembly via a groove on the side of the mounting base. The limiting hole formed by the groove and the contact section of the pressure head, along with the limiting rod, is used for insertion and fixation. Combined with the frictional anti-loosening properties of the rubber sleeve, a three-step replacement mechanism is formed: sliding alignment, insertion rod limiting, and rubber anti-loosening. Compared with the traditional bolt fixing mode, this simplifies the operation process and significantly improves the efficiency of mold replacement. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall appearance of this utility model;

[0020] Figure 2 This is a three-dimensional appearance diagram of the groove plate assembly of this utility model;

[0021] Figure 3 This is a three-dimensional appearance schematic diagram of the extrusion component of this utility model;

[0022] Figure 4 This is a three-dimensional diagram showing the disassembled appearance of this utility model.

[0023] In the diagram: 1. Operating table; 2. Slot plate assembly; 21. Bearing; 22. Connecting column; 23. Slot plate; 24. Positioning rod; 25. Positioning hole; 3. Rotating block; 4. Extrusion assembly; 41. Torque rod; 42. Connecting block; 43. Mounting base; 44. Press head; 45. Limiting rod; 46. Rubber sleeve. Detailed Implementation

[0024] 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.

[0025] This utility model provides two technical solutions:

[0026] Figures 1-4The first embodiment is shown: a manual bending tool, including an operating table 1, a groove plate assembly 2 fixedly connected to one end of the top surface of the operating table 1 in an axisymmetric manner, a rotating block 3 fixedly connected to the top surface of the operating table 1, and a pressing assembly 4 sleeved inside the rotating block 3; the groove plate assembly 2 includes a bearing 21 fixedly connected to the top surface of the operating table 1 in an axisymmetric manner, a connecting column 22 sleeved inside the bearing 21, a groove plate 23 fixedly connected to the top end of the connecting column 22, an insertion hole opened on the top surface of the groove plate 23, a positioning rod 24 inserted into the insertion hole, a plurality of positioning holes 25 opened in an axisymmetric manner on the top surface of the operating table 1, and the bottom end of the positioning rod 24 threadedly connected to the inside of the positioning hole 25.

[0027] Specifically, the operator first moves the symmetrically arranged slotted plates 23, causing them to rotate within the bearing 21 via the bottom connecting column 22, changing the V-shaped angle formed by the two slotted plates to the target angle; then, the positioning rod 24 is inserted into the insertion hole on the top surface of the slotted plate 23, and the threaded end of the rod is screwed into the corresponding positioning hole 25 on the operating table 1 to complete the angle locking; during the bending operation, the operator directly moves the torque rod 41 of the extrusion assembly 4, which forms a lever fulcrum through the constraint of the rotating block 3, driving the connecting block 42 to make the mounting seat 43 move vertically downward, and finally driving the pressure head 44 to perform purely mechanical bending on the flat steel between the slotted plates 23, without the need for a hydraulic device throughout the process.

[0028] In this embodiment, the extrusion assembly 4 includes a torque rod 41 sleeved inside the rotating block 3. One end of the torque rod 41 is fixedly connected to a rotatable connecting block 42. A mounting base 43 is fixedly connected to the side of the connecting block 42. A sliding groove is provided on the side of the mounting base 43. A pressure head 44 is slidably connected to the side of the mounting base 43 through the sliding groove. A limiting hole is provided at the contact section between the sliding groove and the pressure head 44. Half of the limiting hole is located in the sliding groove, and the other half is located at one end of the pressure head. A limiting rod 45 is inserted into the inside of the limiting hole. A rubber sleeve 46 is sleeved on the surface of the limiting rod 45.

[0029] Specifically, select a pressure head 44 of the appropriate specification and push it laterally along the slide groove on the side of the mounting base 43 until the limiting hole is aligned with the hole. The hole is contributed by the side wall of the slide groove and the end of the pressure head 44. Then, insert the limiting rod 45 wrapped with rubber sleeve 46 into the shared limiting hole. The elastic deformation of the rubber sleeve 46 generates frictional resistance to prevent loosening. When disassembling, pull out the limiting rod 45 in the opposite direction to slide out the pressure head 44. The mold can be changed in three steps.

[0030] Figures 1-4 The second embodiment is shown, the main difference from the first embodiment is that the slot plate 23 of the slot plate assembly 2 is rotatably mounted on the operating table 1 via the connecting column 22 and the bearing 21;

[0031] Specifically, when the bending angle needs to be adjusted, the operator directly moves the slot plate 23, and the connecting column 22 rotates within the bearing 21 to change the included angle of the slot plate 23. Then, the positioning rod 24 is inserted into the slot plate insertion hole and screwed into the positioning hole 25 of the operating table 1 to fix the angle. This structure utilizes the rolling friction characteristics of the bearing 21 to reduce the rotational resistance of the slot plate 23, which reduces the wear rate compared to the traditional hinge structure. In addition, the vertical load-bearing design of the connecting column 22 and the bearing 21 avoids angular skew and ensures that the double slot plates 23 are always symmetrically aligned with the workpiece.

[0032] The limiting hole in the contact section between the chute and the pressure head 44 is formed by the sidewall of the chute and the sidewall of the pressure head 44.

[0033] Specifically, when replacing the pressure head 44, the pressure head 44 is pushed in along the slide groove of the mounting base 43, so that the half hole at the end of the pressure head aligns with the half hole on the side wall of the slide groove to form a complete limiting hole. The limiting rod 45 wrapped with rubber sleeve 46 is then inserted to complete the locking. This shared limiting hole structure eliminates the concentricity tolerance requirements of traditional split positioning holes, improves the assembly error tolerance, and generates radial friction force due to the compression of the hole wall on the rubber sleeve 46 when the limiting rod 45 is inserted, preventing accidental dislodgement caused by operational vibration.

[0034] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0035] Working principle: During operation, first adjust the angle of the slot plate—rotate the slot plate 23 within the bearing 21 via the bottom connecting column 22, so that the included angle of the double slot plates 23 matches the target bending angle. Then, insert the positioning rod 24 into the insertion hole on the top surface of the slot plate 23 and screw its bottom end into the corresponding positioning hole 25 on the operating table 1 to lock the angle. Next, replace the pressure head mold and push the pressure head 44 along the slide groove on the side of the mounting base 43 until the half hole at the end of the pressure head 44 aligns with the half hole on the side wall of the slide groove to form a complete limiting hole. Insert the limiting rod 45 wrapped with rubber sleeve 46 to fix the pressure head 44. Finally, perform the bending operation—the operator applies pressure to the torque rod 41, using the rotating block 3 as a lever fulcrum. The torque is converted into the vertical displacement of the mounting base 43 through the connecting block 42, driving the pressure head 44 to squeeze the flat steel between the slot plates 23 until plastic deformation occurs. The entire process transmits force through the mechanical structure, avoiding the maintenance requirements of the hydraulic system. At the same time, the cooperation structure of the slide groove and the limiting rod 45 reduces the time spent on mold replacement.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0037] 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 alterations 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 manual bending tool, comprising an operating table (1), characterized in that: One end of the top surface of the operating table (1) is fixedly connected to a slotted plate assembly (2) in an axisymmetric manner. A rotating block (3) is fixedly connected to the top surface of the operating table (1). An extrusion assembly (4) is sleeved inside the rotating block (3). The slot plate assembly (2) includes a bearing (21) fixedly connected to the top surface of the operating table (1) in an axisymmetric manner. A connecting column (22) is sleeved inside the bearing (21). A slot plate (23) is fixedly connected to the top of the connecting column (22). An insertion hole is opened on the top surface of the slot plate (23). A positioning rod (24) is inserted into the insertion hole. A plurality of positioning holes (25) are opened in an axisymmetric manner on the top surface of the operating table (1). The bottom end of the positioning rod (24) is threaded into the inside of the positioning hole (25). The extrusion assembly (4) includes a torque rod (41) sleeved inside the rotating block (3). One end of the torque rod (41) is fixedly connected to a rotatable connecting block (42). A mounting base (43) is fixedly connected to the side of the connecting block (42). A sliding groove is provided on the side of the mounting base (43). A pressure head (44) is slidably connected to the side of the mounting base (43) through the sliding groove. A limiting hole is provided at the contact section between the sliding groove and the pressure head (44). Half of the limiting hole is located in the sliding groove, and the other half is located at one end of the pressure head. A limiting rod (45) is inserted into the inside of the limiting hole. A rubber sleeve (46) is sleeved on the surface of the limiting rod (45).

2. The manual bending tool according to claim 1, characterized in that: The slot plate (23) of the slot plate assembly (2) is rotatably mounted on the operating table (1) via a connecting column (22) and a bearing (21).

3. A manual bending tool according to claim 1, characterized in that: The angle of the slot plate (23) is fixed by inserting the positioning rod (24) into its socket and threading it into the corresponding positioning hole (25) on the top surface of the operating table (1).

4. A manual bending tool according to claim 1, characterized in that: The torque rod (41) of the extrusion assembly (4) is limited by the rotating block (3) and can rotate on the operating table (1). The torque rod (41) drives the mounting base (43) to move through the connecting block (42).

5. A manual bending tool according to claim 1, characterized in that: The pressure head (44) is slidably installed on the side of the mounting base (43) through a groove, and is fixed by a limiting rod (45) inserted into the limiting hole.

6. A manual bending tool according to claim 1, characterized in that: The limiting hole in the contact section between the chute and the pressure head (44) is formed by the sidewall of the chute and the sidewall of the pressure head (44).

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