Steel bar bending device

Abstract

The invention discloses a steel bar bending device which comprises a positioning disc and two jacking wheels capable of rotating around the positioning disc in the circumferential direction, the jacking wheels rotate around the positioning disc in the circumferential direction so that a steel bar clamped between the positioning disc and the jacking wheels can be bent, the steel bar bending device further comprises two connecting rods and two supporting rods, the number of the jacking wheels is two, and the number of the supporting rods is two. The two jacking wheels are rotationally connected with a middle shaft of the positioning disc through the connecting rods respectively, the two supporting rods are rotationally connected with one ends of the two supporting rods respectively, and the other ends of the two supporting rods are rotationally connected in a crossed mode through a hinge shaft. The four mechanisms are used for driving the two jacking wheels to jack the steel bar at the same time, so that the steel bar is only subjected to the radial jacking force of the jacking wheels relative to the positioning disc, the rotating force couple generated by the two jacking force relative to the positioning disc to the steel bar is equal in magnitude and opposite in direction, and therefore the steel bar is only subjected to the rotating force effect; and the effect of tension along the length of the steel bar is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bending tools, and in particular to a steel bar bending device. Background Art

[0002] In the construction process of reinforced concrete structures such as housing construction, petrochemical civil engineering, water conservancy, and municipal engineering, all places where steel bars are bent and anchored need to be bent at different angles in different places during the construction process. However, in the actual construction acceptance process, it is found that the ends of the reinforcing bars, stirrups, hooks, etc. in many places are not bent due to various factors, which leads to the failure of acceptance. Most traditional bending tools are levers, and two stoppers are set on the lever, so that the steel bar is stuck between the two stoppers, and then the lever is turned to use the two stoppers to bend the steel bar. However, in addition to the bending force couple on the steel bar, this lever will also generate an additional pulling force on the steel bar in the length direction during the bending process, which is easy to cause the displacement of the steel bar relative to the original fixed position or damage to other connected objects. In addition, this lever requires a certain force angle and rotation range, but some of these steel bars that need to be bent are located in narrow corners, so that the lever is difficult to use or the rotation angle is limited. Summary of the invention

[0003] In order to solve the problem that steel bars are inconvenient to be bent by traditional tools, the present invention proposes a steel bar bending device, which allows the steel bars to be bent by a balanced force couple, and the steel bars receive tension in the length direction while being bent.

[0004] The technical solution adopted by the present invention is to design a steel bar bending device, including a positioning plate and a top pressure wheel that can rotate circumferentially around the positioning plate, the top pressure wheel rotates circumferentially around the positioning plate so that the steel bar clamped between the positioning plate and the top pressure wheel is bent, and also includes two connecting rods and two supporting rods, the top pressure wheels are two, the two top pressure wheels are rotationally connected to the central axis of the positioning plate through one of the connecting rods respectively, the two support rods are rotationally connected to one end of the two support rods respectively, and the other ends of the two support rods are cross-rotatably connected through a hinge axis.

[0005] In some embodiments, the surface of the positioning plate has a plurality of positioning holes distributed around it, and the positioning holes are matched with positioning pins. After the positioning pins are inserted into the positioning holes, the portion of the positioning pins that protrudes above the surface of the plate can stop the support rod.

[0006] In some embodiments, the pressing wheel is located between the positioning plate and the hinge shaft.

[0007] In some embodiments, the support rod is provided with a plurality of insertion holes arranged along the length direction, and the two support rods are rotatably connected via a pin passing through the insertion holes.

[0008] In some embodiments, the center axis of the positioning disc is located between the top pressure wheel and the hinge axis.

[0009] In certain embodiments, the central axis of the positioning plate is connected to the hinge axis via a telescopic cylinder with adjustable length.

[0010] In some embodiments, a motor is disposed on the positioning disk, and the motor controls the telescopic cylinder to rotate around the central axis relative to the positioning disk.

[0011] In some embodiments, the motor is rotatably connected to the positioning plate, and the motor is fixedly connected to the bearing rod.

[0012] In some embodiments, the motor is fixedly connected to the positioning plate, and the motor is fixedly connected to the bearing rod.

[0013] In some embodiments, the load-bearing rod is a telescopic rod with adjustable length.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes four mechanisms to drive two pressing wheels to press the steel bars simultaneously, so that the steel bars are only subjected to the radial pressing pressure of the pressing wheels relative to the positioning plate, and the rotational force pairs generated by the two pressing pressures relative to the positioning plate on the steel bars are equal in magnitude and opposite in direction. Therefore, the steel bars are only subjected to the rotational force and are not subjected to the tensile force along the length of the steel bars, thereby avoiding displacement of the steel bars relative to the original fixed position or damage to other connected objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is described in detail below in conjunction with specific embodiments and drawings. In order to show details and facilitate understanding of its principles, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Among them: Figure 1 It is a schematic diagram of the first embodiment after the two top pressure wheels are close to each other.

[0016] Figure 2 It is a schematic diagram of the top pressure wheel fixed pressure steel bar in the first embodiment.

[0017] Figure 3 It is a schematic diagram of the two pressing wheels of the second embodiment after they are close to each other.

[0018] Figure 4 It is a schematic diagram of the top pressure wheel fixed pressure steel bar in the second embodiment.

[0019] Figure 5 It is a schematic diagram of the steel bar bending device of the second embodiment after being separated from the steel bar.

[0020] In the figure, 1, positioning plate; 2, top pressure wheel; 3, steel bar; 4, connecting rod; 5, support rod; 6, middle axis; 7, hinge axis; 8, positioning hole; 9, positioning pin; 10, socket; 11, latch; 12, telescopic cylinder; 13, motor; 14, load-bearing rod. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required for the solutions of the invention.

[0022] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments. Example

[0023] like Figure 1 , 2 As shown, a steel bar 3 bending device comprises a positioning plate 1 and a top pressure wheel 2 that can rotate circumferentially around the positioning plate 1, wherein the top pressure wheel 2 rotates circumferentially around the positioning plate 1 so that the steel bar 3 sandwiched between the positioning plate 1 and the top pressure wheel 2 is bent, and further comprises two connecting rods 4 and two supporting rods 5, wherein there are two top pressure wheels 2, and the two top pressure wheels 2 are respectively connected to the central axis 6 of the positioning plate 1 through one connecting rod 4, and the two supporting rods 5 are respectively connected to one end of the two supporting rods 5, and the other ends of the two supporting rods 5 are cross-connected and rotated through a hinge shaft 7. The top pressure wheel 2 is located between the positioning plate 1 and the hinge shaft 7. The supporting rod 5 is equivalent to a lever for controlling the rotation of the fixed pressure wheel.

[0024] The two support rods 5 and the two connecting rods 4 relatively form a four-link 4 motion mechanism. When in use, first, the two support rods 5 are rotated relatively to each other by manual or other tools, so that the angle between the two support rods 5 becomes smaller, thereby making the two pressing wheels 2 approach each other, so that the ends of the steel bars 3 pass through between the two pressing wheels 2 and the positioning plate 1, and then the two support rods 5 are rotated relatively to each other by manual or other tools, so that the angle between the two support rods 5 becomes larger, so that the two pressing wheels 2 simultaneously press and bend the steel bars 3 relative to the positioning plate 1. Since the steel bars 3 are only subjected to the radial pressing pressure of the pressing wheels 2 relative to the positioning plate 1, the rotational force pairs generated by the two pressing pressures relative to the positioning plate 1 on the steel bars 3 are equal in magnitude and opposite in direction. Therefore, the steel bars 3 are only subjected to the rotational force and are not subjected to the tensile force along the length of the steel bars 3. Therefore, the steel bars 3 will not be pulled out at a relatively fixed position in the length direction during the bending process.

[0025] Furthermore, the surface of the positioning disk 1 is provided with several positioning holes 8 distributed circumferentially, and the positioning holes 8 are matched with positioning pins 9. After the positioning pins 9 are inserted into the positioning holes 8, the portion of the positioning pins 9 protruding from the surface of the disk can stop the support rod 5, thereby preventing one of the connecting rods 4 from rotating relative to the positioning disk 1, so that only one of the top pressure wheels 2 rotates around the positioning disk 1 to bend the end of the steel bar 3, and the other top pressure wheel 2 and the positioning pins 9 clamp the steel bar 3, so that the positioning disk 1 is fixed relative to the steel bar 3, so that the steel bar 3 is better fixed during the bending process.

[0026] Furthermore, the support rod 5 is provided with a plurality of insertion holes 10 arranged along the length direction, and the two support rods 5 are rotatably connected by means of a pin 11 passing through the insertion holes 10, so that the two support rods 5 are rotatably connected together, and the two support rods 5 are connected together through the insertion holes 10 at different positions, so as to adjust the hinged rotation position of the two support rods 5, and thus adjust the ratio of the distance between the two free ends of the support rod 5 and the distance between the two pressing wheels 2, so as to adapt to the movement range of the support rod 5 and avoid limiting the rotation range.

[0027] Embodiment 2 like Figure 3 , 4 As shown in Figure 5, different from the above-mentioned embodiments, the central axis 6 of the positioning plate 1 is located between the top pressure wheel 2 and the hinge axis 7, that is, the support rod 5 and the connecting rod 4 are both located on the same side of the top pressure wheel 2, and the length of the support rod 5 is greater than the length of the connecting rod 4.

[0028] The central axis 6 of the positioning plate 1 is connected to the hinge axis 7 via a telescopic cylinder 12 with adjustable length, such as a pneumatic cylinder or a hydraulic cylinder, so as to control the distance between the central axis 6 and the hinge axis 7, thereby controlling the angle between the two support rods 5 and controlling the rotation of the top pressing wheel 2 relative to the positioning plate 1, thereby achieving the bending of the steel bar 3. The extension of the telescopic cylinder 12 can increase the distance between the two top pressing wheels 2, and the shortening of the telescopic cylinder 12 can reduce the distance between the two top pressing wheels 2.

[0029] Furthermore, a motor 13 is provided on the positioning plate 1. The motor 13 controls the telescopic cylinder 12 to rotate relative to the positioning plate 1 around the central axis 6, thereby adjusting the position of the telescopic cylinder 12, and further adjusting the position of the top pressure wheel 2 relative to the positioning plate 1, so as to facilitate the bending of the ends of the steel bars 3 at different positions. The motor 13 can be rotatably connected to the positioning plate 1, or can be fixedly connected to the positioning plate 1. The motor 13 is fixedly connected to a bearing rod 14. The bearing rod 14 is used to support and fix the motor 13 so that the motor 13 is relatively fixed. For example, the bearing rod 14 can be supported and fixed on the ground. The bearing rod 14 can be a telescopic rod with adjustable length, so that the support distance can be adjusted as needed. After bending, the telescopic cylinder 12 is first extended so that the two top pressure wheels 2 are close to each other, and then the rotation of the top pressure wheels 2 relative to the central axis 6 is adjusted by rotating the motor 13 so that the two top pressure wheels 2 leave the steel bars 3, so that the positioning plate 1 leaves the steel bars 3, that is, the separation of the steel bar 3 bending device and the steel bars 3 is achieved, such as Figure 5 shown.

[0030] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them in similar ways, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0031] Although some terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention. The execution order of actions, steps, etc. in the devices and methods shown in the specification and the drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar sequential terms (for example, "first", "next", "secondly", "again", "then", etc.) used for the convenience of description do not mean that they must be implemented in such an order.

[0032] It should be understood by those skilled in the art that all directional references (e.g., above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to facilitate the reader's understanding, and do not represent limitations (e.g., on position, orientation or use, etc.) on the scope of the invention as defined by the appended claims. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, some vague terms (e.g., substantially, certain, generally, etc.) may refer to slight inaccuracies or slight deviations of conditions, quantities, values, or dimensions, some of which are within the manufacturing deviation or tolerance range. It should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of this application.

Claims

1. A steel bar bending device, comprising a positioning plate and a top pressing wheel capable of rotating circumferentially around the positioning plate, wherein the top pressing wheel rotates circumferentially around the positioning plate so that the steel bar sandwiched between the positioning plate and the top pressing wheel is bent, characterized in that: It also includes two connecting rods and two supporting rods. There are two pressing wheels. The two pressing wheels are rotatably connected to the central axis of the positioning plate through a connecting rod respectively. The two supporting rods are rotatably connected to one end of the two supporting rods respectively, and the other ends of the two supporting rods are cross-rotatably connected through a hinge axis.

2. The steel bar bending device according to claim 1, characterized in that: A plurality of positioning holes are distributed on the circumference of the disk surface of the positioning disk, and the positioning holes are matched with positioning pins. After the positioning pins are inserted into the positioning holes, the portion of the positioning pins that protrudes above the disk surface can lock the support rod.

3. The steel bar bending device according to claim 1, characterized in that: The pressing wheel is located between the positioning plate and the hinge shaft.

4. The steel bar bending device according to claim 1, characterized in that: The support rod is provided with a plurality of insertion holes arranged along the length direction, and the two support rods are rotatably connected by a pin passing through the insertion holes.

5. The steel bar bending device according to claim 1, characterized in that: The central axis of the positioning disc is located between the top pressure wheel and the hinge shaft.

6. The steel bar bending device according to claim 5, characterized in that: The central axis of the positioning plate is connected to the hinge axis via a telescopic cylinder with adjustable length.

7. The steel bar bending device according to claim 6, characterized in that: The positioning disk is provided with a motor, and the motor controls the telescopic cylinder to rotate around the central axis relative to the positioning disk.

8. The steel bar bending device according to claim 7, characterized in that: The motor is rotatably connected to the positioning plate, and the motor is fixedly connected to the bearing rod.

9. The steel bar bending device according to claim 7, characterized in that: The motor is fixedly connected to the positioning plate, and the motor is fixedly connected to the bearing rod.

10. The steel bar bending device according to claim 8 or 9, characterized in that: The bearing rod is a telescopic rod with adjustable length.

Images