A bending device

Abstract

The utility model relates to the technical field of building construction provides a kind of bending device.The bending device includes force application and force receiving element, force receiving element is located at the one end of force application, and it is set between force application with an angle, force receiving element is equipped with limit hole, limit hole is used to limit the piece to be bent, the inner wall of limit hole is equipped with limit tooth.The utility model solves the defect that there is operation difficulty when narrow space construction in prior art, realizes a kind of bending device that can be locally bent to steel bar in narrow space and simple operation.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a bending device. Background Technology

[0002] In bridge, building, and municipal engineering construction, it is often necessary to bend steel bars to meet binding or installation requirements. However, in some construction scenarios, space is limited, making it difficult to operate conventional bending equipment. Therefore, a manual bending device suitable for confined spaces is needed to flexibly complete steel bar bending operations.

[0003] Currently, common methods of bending rebar mainly rely on large electric or hydraulic bending machines, which use power to drive the bending mechanism to bend the rebar in batches or at large angles. In addition, some manual bending tools use simple lever structures, but they are usually large in size or require external support, making them difficult to use in confined spaces.

[0004] Existing bending equipment and tools present difficulties in operation when working in confined spaces, especially in meeting the local bending requirements of shaped steel bars, which leads to reduced construction efficiency or even failure to complete the work. Utility Model Content

[0005] This utility model provides a bending device to solve the defects of existing technology that are difficult to operate when constructing in a narrow space, and realizes a bending device that can locally bend steel bars in a narrow space and is easy to operate.

[0006] This utility model provides a bending device, comprising: Force-applying component; A force-bearing component is located at one end of the force-applying component and is set at an angle to the force-applying component. The force-bearing component is provided with a limiting hole, which is used to limit the bending component 300. The inner wall of the limiting hole is provided with limiting teeth.

[0007] According to the present invention, a bending device is provided in which the rear side of the force-bearing member is bent at an arc towards its front side, and the limiting hole extends from the front side to the rear side.

[0008] According to the present invention, a bending device is provided, wherein multiple limiting holes are provided, and the multiple limiting holes are arranged at intervals along the length direction of the force-bearing member.

[0009] According to the bending device provided by this utility model, a reinforcing part is provided in the middle of the left and right sides of the force-bearing member, and the limiting hole is located between the two reinforcing parts.

[0010] According to the bending device provided by this utility model, the force-applying component includes: The rod body, wherein the force-bearing component is located at one end of the rod body; A handle is located at the other end of the rod body.

[0011] According to the present invention, a bending device is provided in which the handle is detachably connected to the rod body.

[0012] According to the present invention, a bending device is provided, wherein the handle is used to switch between a folded state and an extended state; In the folded state, the handle is gathered around the outer periphery of the rod body; In the extended state, the handle extends outward along the length of the rod body to increase the length of the rod body.

[0013] According to the present invention, a bending device is provided with an anti-slip sleeve on the outside of the handle.

[0014] According to the bending device provided by this utility model, the rod body includes: outer cylinder; The inner cylinder is slidably connected to the inside of the outer cylinder; A locking element is provided between the outer cylinder and the inner cylinder to lock the relative position between the outer cylinder and the inner cylinder; The inner cylinder and the outer cylinder are telescopic along their length, one of the inner cylinder and the outer cylinder is connected to the force-bearing component, and the other of the inner cylinder and the outer cylinder is connected to the handle.

[0015] According to the present invention, a bending device is provided at the connection between the force-applying component and the force-receiving component, and a reinforcing rib is provided.

[0016] The bending device provided by this utility model involves inserting the workpiece to be bent into the limiting hole of the force-bearing component. The limiting teeth engage with the surface of the workpiece to prevent slippage. Bending of the workpiece can be achieved by pushing or pulling the force-applying component. This structure utilizes the lever principle to simplify the operation process, and the angle between the force-applying component and the force-bearing component allows for effective torque transmission when bending the rebar head in a confined space. Therefore, this utility model enables bending of workpieces in confined spaces. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a side view of the bending device provided by this utility model; Figure 2 This is a front view of the bending device provided by this utility model; Figure 3 This is a construction status diagram of the bending device provided by this utility model.

[0019] Figure label: 100: Force-applying component; 110: Rod body; 120: Handle; 200: Load-bearing component; 210: Limiting hole; 220: Limiting tooth; 300: Part to be bent. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] During the construction of bridges, buildings, and municipal works, it is common to encounter situations requiring the use of even the smallest spaces (similar to...). Figure 3 As shown, the protruding rebar ends are bent. Due to space limitations, large bending machines cannot be used and are difficult to operate. To solve this problem, the present invention provides a novel bending device that enables bending of the rebar 300 in a confined space.

[0022] The following is combined with Figures 1-3 Describe the structure and working principle of this utility model.

[0023] Reference Figure 1 The present invention provides a bending device including a force-applying component 100 and a force-receiving component 200. The force-receiving component 200 is disposed at one end of the force-applying component 100 and is arranged at an angle to the force-applying component 100. The force-receiving component 200 is provided with a limiting hole for limiting the bending component 300. The inner wall of the limiting hole is provided with limiting teeth 220.

[0024] This invention utilizes the angle between the force-applying component 100 and the force-receiving component 200 to effectively transmit torque when bending a rebar in a confined space. During operation, the rebar to be bent 300 is inserted into the limiting hole of the force-receiving component 200. The limiting teeth 220 engage with the surface of the rebar to prevent slippage. Bending of the rebar 300 is achieved by pushing or pulling the force-applying component 100. This structure simplifies the operation process using the lever principle, and the design of the limiting teeth 220 provides a more secure locking point for the rebar to be bent 300, effectively preventing it from slipping out.

[0025] Specifically, the connection between the force-applying component 100 and the force-receiving component 200 can be a fixed connection or an adjustable connection. In a fixed connection, one end of the force-applying component 100 is fixed to the force-receiving component 200 by welding or integral molding, and the included angle between them is a non-adjustable obtuse angle. In an adjustable connection, the end of the force-applying component 100 is provided with a hinge hole, and the force-receiving component 200 is hinged to the force-applying component 100 by bolts, and the angle is fixed by a lock nut, thereby achieving adaptive adjustment of the included angle. The limiting hole of the force-receiving component 200 can penetrate its main body, and the limiting teeth 220 are distributed circumferentially along the inner wall of the limiting hole, with the tooth shape being triangular or trapezoidal to enhance the biting effect. The force-applying component 100 is a straight rod or a curved rod structure, and its length is determined according to the requirements of the operating space.

[0026] Furthermore, the materials of the force-applying component 100 and the force-receiving component 200 must balance strength and machinability. The force-applying component 100 can be made of high-strength alloy steel or carbon steel to ensure it can withstand large torques without deformation during bending. Its surface can be hardened or plated to improve wear resistance. The force-receiving component 200, because it needs to directly contact the component 300 to be bent and bear local pressure, can be made of tool steel or manganese steel. The limiting teeth 220 on the inner wall of its limiting hole can be hardened through high-frequency quenching. For lightweight applications, the force-applying component 100 can be made of aluminum alloy, with increased cross-sectional thickness to ensure rigidity; the force-receiving component 200 can be made of titanium alloy to reduce weight while maintaining sufficient compressive strength. If corrosion resistance is required, both can be made of stainless steel or surface-galvanized, suitable for humid or open-air construction environments. It should be noted that there are no specific restrictions on the materials of the force-applying component 100 and the force-receiving component 200; adjustments can be made based on actual working conditions and economic considerations.

[0027] In other possible embodiments, the force-bearing component 200 may be equipped with a replaceable limiting sleeve, which is fixed in the mounting hole of the force-bearing component 200 by threads or snaps. The inner diameter of different limiting sleeves and the arrangement of the limiting teeth 220 can be adjusted according to the diameter of the component 300 to be bent. The end of the force-applying component 100 may be equipped with an extension rod interface for connecting an extension rod to increase the operating torque. An angle adjustment mechanism may be added to the connection between the force-bearing component 200 and the force-applying component 100. This mechanism consists of a rotating sleeve with a scale and a positioning pin. The angle between the force-applying component 100 and the force-bearing component 200 can be changed by adjusting the fixed position of the rotating sleeve. This embodiment improves the adaptability of the device through the design of a replaceable limiting sleeve, which can match the bending requirements of steel bars of different specifications. The setting of the extension rod interface and the angle adjustment mechanism allows the operator to flexibly adjust the force application angle and lever arm length according to the construction environment, thereby improving bending efficiency.

[0028] Reference Figure 1 and Figure 3In some embodiments of this utility model, the rear side of the force-bearing member 200 is curved toward its front side, and the limiting hole extends from the front side to the rear side.

[0029] This embodiment utilizes a structural design where the rear side of the force-bearing component 200 curves towards its front side, creating a natural guide channel for the limiting hole. When the component to be bent 300 is inserted into the limiting hole, the curved rear side provides progressive guidance, making it easier to center and position the rebar end. During operation, when the force-applying component 100 applies torque, the curved structure evenly distributes the bending stress, preventing stress concentration that could damage the rebar surface. This design effectively reduces operational difficulty and improves bending accuracy in confined spaces, while minimizing damage to the rebar structure.

[0030] Specifically, the curvature bending of the 200mm load-bearing component can be achieved in two ways. For integral structures, a hot bending process is used to heat the steel plate to a plastic state and then bend it using a mold. The bending radius is controlled within 2-3 times the diameter of the reinforcing bar to ensure the guiding effect. For modular structures, the front and rear sides are processed separately and then connected by beveling. The welded parts need to be annealed to eliminate internal stress.

[0031] In some other possible embodiments, a removable wear-resistant liner can be provided on the arc-shaped rear side of the load-bearing component 200. The liner is fixed to the load-bearing area of ​​the load-bearing component 200 by countersunk screws. The liner is made of high-chromium cast iron, and its inner surface is machined with an arc consistent with that of the load-bearing component 200. This embodiment significantly extends the service life of the device through the design of a replaceable wear-resistant liner, making it suitable for high-intensity continuous operation. The modular design of the liner facilitates partial replacement according to wear conditions, reducing maintenance costs. Furthermore, liner materials of different hardness can be selected to accommodate the bending requirements of reinforcing bars of different grades.

[0032] In some embodiments of this utility model, multiple limiting holes are provided, and the multiple limiting holes are arranged at intervals along the length direction of the force-bearing member 200. The limiting holes have different diameters to enable bending of members 300 with different diameters.

[0033] This embodiment uses multiple limiting holes of different diameters on the load-bearing component 200 to allow a single device to adapt to the bending requirements of components 300 with different diameters. During operation, the limiting hole of the corresponding diameter is selected according to the diameter of the reinforcing bar. After inserting the component 300 to be bent, a torque is applied by the force-applying component 100 to complete the bending operation. The limiting holes of different diameters are arranged at intervals along the length of the load-bearing component 200, ensuring the structural strength of the device while achieving rapid adaptation to different specifications of reinforcing bars. This design significantly improves construction efficiency, reduces the number of tool changes, and is particularly suitable for construction sites requiring frequent handling of various specifications of reinforcing bars. Specifically, the multiple limiting holes are arranged in a gradient pattern, with the smallest diameter located at the far end of the load-bearing component 200, and the diameter increasing sequentially towards the near end. The inner wall of each limiting hole is provided with limiting teeth 220 that match the diameter, with the tooth pitch increasing accordingly as the diameter increases.

[0034] Reference Figure 2 In some embodiments of this utility model, the middle of the left and right sides of the force-bearing member 200 is provided with a reinforcing part, and the limiting hole is located between the two reinforcing parts.

[0035] This embodiment incorporates reinforcing sections at the midpoint of both sides of the load-bearing component 200, placing the limiting hole within the reinforced area between the two reinforcing sections. This structure effectively disperses stress during bending operations, preventing deformation of the load-bearing component 200 due to localized stress concentration. During operation, the component 300 to be bent is inserted into the limiting hole, with the reinforcing sections on both sides providing stable support. The bending is completed by applying torque through the force-applying component 100. This design significantly improves the structural strength and durability of the device, making it particularly suitable for high-intensity, repetitive steel bar bending operations, while ensuring bending accuracy and operational stability.

[0036] Specifically, the reinforcement can adopt two structural forms: for an integral structure, the load-bearing component 200 is integrally formed by forging, and the reinforcement is a protrusion extending outward from the body, with the height of the protrusion being 1.2-1.5 times the thickness of the load-bearing component 200; for a combined structure, the reinforcement is an independent steel block, which is connected to the main body of the load-bearing component 200 by high-strength bolts, and the connection surface is machined with a positioning stop to ensure the centering accuracy.

[0037] Reference Figure 2 In some embodiments of this utility model, the force-applying component 100 includes a rod body 110 and a handle 120. The force-receiving component 200 is disposed at one end of the rod body 110; the handle 120 is disposed at the other end of the rod body 110.

[0038] This embodiment achieves an optimized combination of torque transmission and operational comfort by dividing the force-applying component 100 into a rod body 110 and a handle 120. The force-receiving component 200 is fixed to the working end of the rod body 110, and the handle 120 is located at the operating end of the rod body 110, forming a complete lever system. During operation, the worker holds the handle 120 to apply force, and the torque is transmitted to the force-receiving component 200 through the rod body 110, causing the component 300 to be bent to complete the bending operation. This structural design ensures sufficient operating leverage while improving grip comfort through the dedicated handle 120, effectively reducing the labor intensity of the worker and improving the accuracy and efficiency of the bending operation.

[0039] In some possible embodiments, the rod body 110 may adopt a variable cross-section design, wherein the section near the force-bearing member 200 has a larger cross-section to enhance structural strength, and gradually transitions to a smaller cross-section towards the handle 120 to reduce overall weight.

[0040] In some possible embodiments, the outside of the handle 120 is provided with an anti-slip part (not shown in the figure).

[0041] Specifically, the anti-slip part can be implemented in two ways: In the overlay structure, the entire outer surface of the handle 120 is covered with an anti-slip rubber sleeve, which is bonded to the handle 120 substrate through a vulcanization process, and the surface is processed with cross-patterns or granular protrusions; in the partial structure, the anti-slip structure is only set in the gripping area of ​​the handle 120, and this area is formed with knurled patterns or groove arrays through machining. The anti-slip rubber sleeve is made of oil-resistant and wear-resistant nitrile rubber material, and the thickness is determined according to the diameter of the handle 120; the depth of the machined anti-slip pattern is 0.5-1mm, and the pattern spacing matches the width of the fingers.

[0042] This embodiment effectively improves the grip stability of construction workers during bending operations by setting an anti-slip part on the outside of the handle 120. When the operator applies torque to bend the steel bar, the anti-slip part increases frictional resistance to prevent hand slippage, ensuring precise control of the force application process. This design significantly reduces force deviation caused by unstable grip, improves work safety, and reduces hand fatigue during prolonged operation, making it particularly suitable for slippery working environments such as damp or oily conditions.

[0043] In some possible embodiments, the handle 120 is detachably connected to the rod body 110.

[0044] This embodiment achieves modular configuration and convenient maintenance of the device through the detachable connection design between the handle 120 and the rod body 110. During operation, construction personnel can replace different types of handles 120 according to work requirements and quickly assemble them with the rod body 110 through standardized connection interfaces. This design maintains the stability of force transmission, improves the adaptability of the device, facilitates the selection of the most suitable handle type 120 for different work scenarios, and simplifies the transportation, storage, and component replacement process.

[0045] Specifically, the detachable connection between the handle 120 and the rod body 110 can be either a threaded connection or a plug-in connection. In the threaded connection, the end of the rod body 110 is machined with an external thread, and the inner hole of the handle 120 has a matching internal thread. The connection is achieved by tightening, and an anti-loosening washer is placed at the joint to prevent loosening during operation. In the plug-in connection, the end of the rod body 110 is machined into a polygonal prism structure, and the inner hole of the handle 120 is a corresponding polygonal sleeve. After insertion, it is locked by a radial pin. An annular locating boss can be provided on the end face of the rod body 110 at the connection point, which cooperates with the locating groove inside the handle 120 to ensure alignment accuracy. The handle 120 is injection molded from nylon composite material, and a metal connecting bushing is embedded inside to improve the interface strength.

[0046] In some possible embodiments, the handle 120 is used to switch between a folded state and an extended state; in the folded state, the handle 120 is brought together at the outer periphery of the rod body 110; in the extended state, the handle 120 extends outward along the length direction of the rod body 110 to increase the length of the rod body 110.

[0047] Specifically, the connection between the handle 120 and the rod body 110 can adopt two structural forms: in the hinged connection, the handle 120 is connected to the rod body 110 through a hinge shaft, and a spring positioning pin is set at the hinge part, which automatically locks when the handle 120 is rotated to the extended position; in the sliding connection, the handle 120 has a guide groove inside that cooperates with the guide rail on the rod body 110, and unfolding and retracting are achieved by sliding, and it is fixed by an elastic buckle after it is in place. The hinge shaft is made of stainless steel and an anti-disengagement ring is set at the shaft end; the surface of the sliding guide rail is hardened to improve wear resistance. When the handle 120 is in the folded state, its inner surface is fixed to the outer wall of the rod body 110 by a magnetic attraction device; when in the extended state, a limiting structure is set at the connection part to ensure that the handle 120 and the rod body 110 remain coaxial.

[0048] This embodiment achieves flexible adjustment of the device length through the switchable design of the handle 120 between a folded state and an extended state. In the folded state, the handle 120 is gathered around the outer periphery of the rod body 110, making the overall structure of the device compact and easy to store and transport. In the extended state, the handle 120 extends along the length of the rod body 110, forming an extended lever arm together with the rod body 110, increasing the torque output during bending operations. This design not only meets the portability requirements for working in confined spaces, but also allows for rapid extension of the device length when greater operating torque is needed, significantly improving construction adaptability and operational efficiency.

[0049] In some possible embodiments, the rod body 110 includes an outer cylinder, an inner cylinder, and a locking element. The inner cylinder is slidably connected inside the outer cylinder; the locking element is disposed between the outer cylinder and the inner cylinder to lock the relative position between the outer cylinder and the inner cylinder; the inner cylinder and the outer cylinder are telescopic along their length, one of the inner cylinder and the outer cylinder is connected to the force-bearing element 200, and the other of the inner cylinder and the outer cylinder is connected to the handle 120.

[0050] This embodiment achieves adjustable length of the rod body 110 through a combination design of an outer cylinder, an inner cylinder, and a locking device. The sliding connection between the inner and outer cylinders allows construction personnel to adjust the total length of the rod body 110 according to operational needs, while the locking device is used to fix the relative position of the inner and outer cylinders. During operation, the length of the rod body 110 can be freely adjusted by unlocking the locking device, and then relocked after adjustment, enabling the device to adapt to different working spaces and torque requirements. This design maintains the structural strength of the rod body 110 while providing flexible length adjustment capabilities, significantly improving the adaptability of the device to different construction environments.

[0051] Specifically, the sliding connection between the inner and outer cylinders can adopt two mating methods: in the tight fit method, the outer surface of the inner cylinder and the inner surface of the outer cylinder are machined into precisely fitted cylindrical surfaces, with the mating clearance controlled at 0.1-0.2mm; in the guide rail type fit, the outer wall of the inner cylinder is provided with an axial guide protrusion, and the corresponding position of the inner wall of the outer cylinder is provided with a guide groove. The locking mechanism includes: threaded locking, in which a radial threaded hole is provided in the outer cylinder wall, and the inner cylinder is fixed by tightening the bolt; and quick clamping, which uses an eccentric wheel locking mechanism, in which the radial pressure generated by rotating the eccentric wheel with a handle locks the inner cylinder.

[0052] In some possible embodiments, a reinforcing rib is provided at the connection between the force-applying member 100 and the force-receiving member 200.

[0053] This embodiment significantly improves the structural strength and bending stiffness of the connection by adding reinforcing ribs at the connection between the force-applying component 100 and the force-receiving component 200. During steel bar bending operations, the reinforcing ribs effectively disperse stress concentration at the connection, preventing deformation or fracture caused by excessive local stress. This design maintains the overall lightweight characteristics of the device while ensuring the load-bearing capacity of key connection parts, enabling the device to maintain structural stability even under large bending moments and extending the service life of the equipment.

[0054] Specifically, the reinforcing ribs can be arranged in two ways: in a radial arrangement, the reinforcing ribs are evenly distributed circumferentially along the connection, extending radially to the body of the stress-applying component 100 and the stress-receiving component 200, with trapezoidal cross-sections; in an axially parallel arrangement, the reinforcing ribs are arranged axially parallel along the connection, with gradually changing rib heights to smoothly transition stress. The connection between the reinforcing ribs and the main structure is achieved through integral casting or welding, with bevel welding and full welding. The reinforcing rib material is consistent with the main structure, using high-strength low-alloy steel; in areas of stress concentration, the rib thickness can be locally increased, and a rounded transition is provided at the root of the rib to avoid abrupt stress changes.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bending device, characterized in that, include: Force-applying component (100); The force-receiving component (200) is located at one end of the force-applying component (100) and is set at an angle with the force-applying component (100). The force-receiving component (200) is provided with a limiting hole, which is used to limit the bending component (300). The inner wall of the limiting hole is provided with limiting teeth (220).

2. The bending device according to claim 1, characterized in that, The rear side of the force-bearing member (200) is curved toward its front side, and the limiting hole extends from the front side to the rear side.

3. The bending device according to claim 2, characterized in that, The limiting holes are provided in multiple ways, and the multiple limiting holes are arranged at intervals along the length direction of the force-bearing member (200).

4. The bending device according to claim 1, characterized in that, The force-bearing member (200) has a reinforcing part in the middle of both the left and right sides, and the limiting hole is located between the two reinforcing parts.

5. The bending device according to any one of claims 1-4, characterized in that, The force-applying component (100) includes: The rod body (110) has the force-bearing member (200) located at one end of the rod body (110); A handle (120) is located at the other end of the rod body (110).

6. The bending device according to claim 5, characterized in that, The handle (120) is detachably connected to the rod body (110).

7. The bending device according to claim 5, characterized in that, The handle (120) is used to switch between a folded state and an extended state; In the folded state, the handle (120) is gathered around the outer periphery of the rod body (110); In the extended state, the handle (120) extends outward along the length direction of the rod body (110) to increase the length of the rod body (110).

8. The bending device according to claim 6 or 7, characterized in that, The handle (120) is provided with an anti-slip sleeve on the outside.

9. The bending device according to claim 5, characterized in that, The rod body (110) includes: outer cylinder; The inner cylinder is slidably connected to the inside of the outer cylinder; A locking element is provided between the outer cylinder and the inner cylinder to lock the relative position between the outer cylinder and the inner cylinder; The inner cylinder and the outer cylinder are telescopic along their length, one of the inner cylinder and the outer cylinder is connected to the force-bearing member (200), and the other of the inner cylinder and the outer cylinder is connected to the handle (120).

10. The bending device according to claim 1, characterized in that, The connection between the force-applying component (100) and the force-receiving component (200) is provided with reinforcing ribs.

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