Steel bar bender for constructional engineering

Abstract

The utility model discloses a steel bar bender for constructional engineering, which belongs to the technical field of steel bar bending and comprises an outer shell, a support is fixed on the inner side of the top surface of the outer shell, and a fixed center pin shaft is fixed on the top surface of the support. A plurality of sliding center pin shafts are arranged on the outer side of the fixed center pin shaft, the sliding center pin shafts are connected in a sliding mode, two lifting rods are fixed to the bottom face of the fixed center pin shaft and the bottom face of each sliding center pin shaft, and a first transmission shaft is rotationally connected to the interior of the support; one end of the first transmission shaft penetrates through the inner side of the outer shell, extends to the outside and is coaxially and fixedly provided with a fluted disc, two cam sets are fixed to the outer side of the first transmission shaft, and each cam set comprises a plurality of cam blocks. The bending pin shaft and the center pin shaft do not need to be replaced frequently, and the problem that the bending pin shaft and the center pin shaft are prone to being lost is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar bending, and more specifically, particularly relates to a steel bar bender for construction engineering. Background Technique

[0002] Steel bar bending is an important task in the fields of construction and engineering, involving a variety of equipment and tools to meet the requirements in different scenarios. The main purpose of steel bar bending is to adjust the shape of the steel bar according to the design requirements to adapt to the specific needs of the building structure. For the existing steel bar benders for construction engineering, according to steel bars of different diameters, appropriate hole positions can be selected on the working disk to insert the pressing and bending pin shafts, or the central pin shafts of different diameters can be replaced to ensure the accuracy of bending. However, frequently replacing the pressing and bending pin shafts and the central pin shafts easily leads to the loss of the pressing and bending pin shafts and the central pin shafts. Therefore, a steel bar bender for construction engineering is proposed. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a steel bar bender for construction engineering, enabling multiple sliding central pin shafts to be successively elevated from the middle to both sides. Since the multiple sliding central pin shafts are in a concentric circle structure, the bending radius of the steel bar is changed, so as to solve the problem that frequently replacing the pressing and bending pin shafts and the central pin shafts easily leads to the loss of the pressing and bending pin shafts and the central pin shafts as mentioned in the above background technique.

[0004] To achieve the above objectives, the present utility model is realized through the following technical solutions: A steel bar bender for construction engineering, comprising a housing body. Inside the top surface of the housing body, a bracket is fixed. On the top surface of the bracket, a fixed central pin shaft is fixed. Outside the fixed central pin shaft, a plurality of sliding central pin shafts are provided. The plurality of sliding central pin shafts are slidably connected to each other. On the bottom surfaces of the fixed central pin shaft and the plurality of sliding central pin shafts, two lifting rods are fixed respectively. Inside the bracket, a first transmission shaft is rotatably connected. One end of the first transmission shaft passes through the inside of the housing body and extends to the outside and is coaxially fixed with a gear disc. On the outside of the first transmission shaft, two cam groups are fixed. Each cam group includes a plurality of cam blocks. The outside of the cam block is in sliding contact with the lower end of the lifting rod. On the bottom surface of the bracket, a fixed shaft is fixed. Outside the fixed shaft, a bevel gear disc is slidably connected. On the bottom surface of the bevel gear disc, an operating rod is rotatably connected. Outside the fixed shaft, a connecting frame is rotatably connected. Inside the connecting frame, a lead screw is rotatably connected. One end of the lead screw is fixed with a first bevel gear. The outside of the first bevel gear is meshed and driven with the outside of the bevel gear disc. A bending pin shaft is threadedly connected to the outside of the lead screw. One end of the connecting frame is fixed with a transmission mechanism. The outside of the gear disc is meshed and connected with a gear. Inside the gear, a second transmission shaft is coaxially fixed. One end of the second transmission shaft is coaxially fixed with a second bevel gear. The outside of the second bevel gear is meshed and driven with the outside of the bevel gear disc. The other end of the second transmission shaft is fixed with a handle.

[0005] As a preferred technical solution of the present utility model, the fixed central pin shaft and the plurality of sliding central pin shafts are in a concentric circle structure.

[0006] As a preferred technical solution of the present utility model, the two lifting rods are arranged in a symmetric structure.

[0007] As a preferred technical solution of the present utility model, the plurality of cam blocks are staggered from each other by an angle of forty-five degrees.

[0008] As a preferred technical solution of the present utility model, the diameter of the gear disc is larger than the diameter of the gear.

[0009] As a preferred technical solution of the present utility model, the center of the fixed shaft and the center of the fixed central pin shaft are on the same vertical line.

[0010] As a preferred technical solution of the present utility model, one end of the operating rod passes through the inside of the housing body and extends to the outside.

[0011] The present utility model provides a steel bar bender for construction engineering, having the following beneficial effects:

[0012] 1. The steel bar bender for construction projects staggers multiple cam blocks by 45 degrees from each other, thereby lifting the lifting rod from the middle to both sides, causing multiple sliding center pins to be successively lifted from the middle to both sides. Since the multiple sliding center pins are in a concentric circle structure, the bending radius of the steel bar is changed, and there is no need to frequently replace the bending pin and the center pin, solving the problem that the bending pin and the center pin are easily lost.

[0013] 2. For the steel bar bender for construction projects, the second transmission shaft drives the bevel gear disk to rotate through the first bevel gear. The bevel gear disk drives the second bevel gear and the lead screw to rotate. The lead screw drives the bending pin to move inside the connecting frame, thereby changing the distance from the sliding center pin, without the need for manual adjustment, which is convenient and fast to use. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of a steel bar bender for construction projects of the present utility model.

[0015] Figure 2 It is a schematic sectional view of a steel bar bender for construction projects of the present utility model.

[0016] Figure 3 It is a steel bar bender for construction projects of the present utility model Figure 2 Enlarged schematic view of part A.

[0017] Figure 4 It is a steel bar bender for construction projects of the present utility model Figure 2 Enlarged schematic view of part B.

[0018] In the figure: 1. Outer housing; 2. Bracket; 3. Fixed center pin; 4. Sliding center pin; 5. Lifting rod; 6. First transmission shaft; 7. Cam group; 8. Handle; 9. Fixed shaft; 10. Bevel gear disk; 11. Operating rod; 12. Connecting frame; 13. Lead screw; 14. First bevel gear; 15. Bending pin; 16. Tooth disk; 17. Transmission mechanism; 18. Gear; 19. Second transmission shaft; 20. Second bevel gear. Detailed Embodiment

[0019] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0020] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] Please refer to Figures 1 to 4, the present utility model provides a technical solution: a steel bar bender for construction engineering, including a housing 1. Inside the top surface of the housing 1, a bracket 2 is fixedly installed. On the top surface of the bracket 2, a fixed central pin shaft 3 is fixedly installed. Outside the fixed central pin shaft 3, a plurality of sliding central pin shafts 4 are provided. The plurality of sliding central pin shafts 4 are slidably connected to each other. On the bottom surfaces of the fixed central pin shaft 3 and the plurality of sliding central pin shafts 4, two lifting rods 5 are fixedly installed. Inside the bracket 2, a first transmission shaft 6 is rotatably connected. One end of the first transmission shaft 6 passes through the inside of the housing 1 and extends to the outside and is coaxially fixedly installed with a gear disk 16. On the outside of the first transmission shaft 6, two cam groups 7 are fixedly installed. Each cam group 7 includes a plurality of cam blocks. The outside of the cam blocks is in sliding contact with the lower ends of the lifting rods 5. On the bottom surface of the bracket 2, a fixed shaft 9 is fixedly installed. Outside the fixed shaft 9, a bevel gear disk 10 is slidably connected. On the bottom surface of the bevel gear disk 10, an operating rod 11 is rotatably connected. Outside the fixed shaft 9, a connecting frame 12 is rotatably connected. Inside the connecting frame 12, a lead screw 13 is rotatably connected. One end of the lead screw 13 is fixedly installed with a first bevel gear 14. The outside of the first bevel gear 14 is meshed and driven with the outside of the bevel gear disk 10. On the outside of the lead screw 13, a bending pin shaft 15 is threadedly connected. One end of the connecting frame 12 is fixedly installed with a transmission mechanism 17. The outside of the gear disk 16 is meshed and connected with a gear 18. Inside the gear 18, a second transmission shaft 19 is coaxially fixedly installed. One end of the second transmission shaft 19 is coaxially fixedly installed with a second bevel gear 20. The outside of the second bevel gear 20 is meshed and driven with the outside of the bevel gear disk 10. The other end of the second transmission shaft 19 is fixedly installed with a handle 8. The fixed central pin shaft 3 and the plurality of sliding central pin shafts 4 are in a concentric circle structure. The two lifting rods 5 are arranged symmetrically. The plurality of cam blocks are staggered from each other by an angle of forty-five degrees. The diameter of the gear disk 16 is larger than the diameter of the gear 18. The center of the fixed shaft 9 and the center of the fixed central pin shaft 3 are on the same vertical line. One end of the operating rod 11 passes through the inside of the housing 1 and extends to the outside;

[0023] By lifting the bevel gear disk 10 through the operating rod 11, the bevel gear disk 10 is meshed with the first bevel gear 14 and the second bevel gear 20. After that, rotating the handle 8 drives the second transmission shaft 19 and the second bevel gear 20 to rotate. During this process, the second transmission shaft 19 drives the gear disk 16 and the first transmission shaft 6 to rotate through the gear 18. The first transmission shaft 6 drives the cam group 7. Since the cam group 7 includes a plurality of cam blocks and the plurality of cam blocks are staggered from each other by an angle of forty-five degrees, the lifting rods 5 are jacked up from the middle to both sides, so that the plurality of sliding central pin shafts 4 are successively lifted from the middle to both sides. Since the plurality of sliding central pin shafts 4 are in a concentric circle structure, the bending radius of the steel bar is changed. At the same time, the second transmission shaft 19 drives the bevel gear disk 10 to rotate through the first bevel gear 14. The bevel gear disk 10 drives the second bevel gear 20 and the lead screw 13 to rotate. The lead screw 13 drives the bending pin shaft 15 to move inside the connecting frame 12, thereby changing the distance from the sliding central pin shaft 4. There is no need for manual adjustment, and it is convenient and fast to use.

[0024] Specific usage mode and function of this embodiment: In this utility model, the bevel gear disc 10 is lifted by the operating rod 11, so that the bevel gear disc 10 meshes with the first bevel gear 14 and the second bevel gear 20. After that, the handle 8 is rotated to drive the second transmission shaft 19 and the second bevel gear 20 to rotate. During this process, the second transmission shaft 19 drives the toothed disc 16 to rotate through the gear 18 and the first transmission shaft 6 rotates. The first transmission shaft 6 drives the cam group 7. Since the cam group 7 includes a plurality of cam blocks and the plurality of cam blocks are staggered from each other by a forty-five-degree angle, the lifting rods 5 are lifted from the middle to both sides, so that the plurality of sliding center pin shafts 4 are successively lifted from the middle to both sides. Since the plurality of sliding center pin shafts 4 are in a concentric circle structure, the bending radius of the steel bar is changed. At the same time, the second transmission shaft 19 drives the bevel gear disc 10 to rotate through the first bevel gear 14. The bevel gear disc 10 drives the second bevel gear 20 and the lead screw 13 to rotate. The lead screw 13 drives the bending pin shaft 15 to move inside the connecting frame 12, so as to change the distance from the sliding center pin shaft 4.

[0025] The above is only a specific and preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A steel bar bending machine for construction engineering, comprising an outer shell (1), characterized in that: A bracket (2) is fixed on the inner side of the top surface of the outer shell (1), a fixed center pin (3) is fixed on the top surface of the bracket (2), a plurality of sliding center pins (4) are arranged on the outer side of the fixed center pin (3), the plurality of sliding center pins (4) are slidably connected to each other, two lifting rods (5) are fixed on the bottom surfaces of the fixed center pin (3) and the plurality of sliding center pins (4), the inside of the bracket (2) is rotatably connected to a first transmission shaft (6), one end of the first transmission shaft (6) passes through the inner side of the outer shell (1) and extends to the outside and is coaxially fixed with a toothed disk (16), two cam groups (7) are fixed on the outer side of the first transmission shaft (6), the cam group (7) includes a plurality of cam blocks, the outer side of the cam blocks is in sliding contact with the lower end of the lifting rod (5), a fixed shaft (9) is fixed on the bottom surface of the bracket (2), the outer side of the fixed shaft (9) is slidably connected to a bevel gear disk (10), The bottom surface of the bevel gear disk (10) is rotatably connected to an operating rod (11); the outer side of the fixed shaft (9) is rotatably connected to a connecting frame (12); the inner side of the connecting frame (12) is rotatably connected to a screw rod (13); a first bevel gear (14) is fixed to one end of the screw rod (13); the outer side of the first bevel gear (14) is meshed with the outer side of the bevel gear disk (10) for transmission; the outer side of the screw rod (13) is threadedly connected to a bending pin shaft (15); a transmission mechanism (17) is fixed to one end of the connecting frame (12); the outer side of the toothed disk (16) is meshed with a gear (18); a second transmission shaft (19) is coaxially fixed to the inner side of the gear (18); a second bevel gear (20) is coaxially fixed to one end of the second transmission shaft (19); the outer side of the second bevel gear (20) is meshed with the outer side of the bevel gear disk (10) for transmission; and a handle (8) is fixed to the other end of the second transmission shaft (19).

2. A steel bar bending machine for construction engineering according to claim 1, characterized in that: The fixed central pin shaft (3) and the plurality of sliding central pin shafts (4) are in a concentric circle structure.

3. A steel bar bending machine for construction engineering according to claim 1, characterized in that: The two lifting rods (5) are arranged in a symmetrical structure.

4. A steel bar bending machine for construction engineering according to claim 1, characterized in that: The multiple cam blocks are staggered at an angle of forty-five degrees.

5. A steel bar bending machine for construction engineering according to claim 1, characterized in that: The diameter of the toothed disc (16) is greater than the diameter of the gear (18).

6. A steel bar bending machine for construction engineering according to claim 1, characterized in that: The center of the fixed shaft (9) and the center of the fixed center pin shaft (3) are located on the same vertical line.

7. A steel bar bending machine for construction engineering according to claim 1, characterized in that: One end of the operating rod (11) passes through the inner side of the outer shell (1) and extends to the outside.

Images