A combined cutterhead rebar shredder

Abstract

The utility model belongs to the field of shredder, especially relate to a reinforcing bar shredder of combined cutter head. The utility model provides a reinforcing bar shredder of combined cutter head, including the shredding mechanism of installing in the inner chamber of shredding box, the shredding mechanism includes two drive rolls, and two drive rolls rotationally connect in the shredding box, and the outside of two drive rolls is fixedly connected with a plurality of fixed rings, the outside of a plurality of fixed rings is detachably installed with a plurality of cutter bodies through detachable assembly, a plurality of cutter bodies constitute cutter head, the cutter body is equipped with three cutting edges, the bevel angle of three cutting edges increases gradually and is distributed in the form of ladder along the axial direction, and the double needs of adapting reinforcing bar preliminary cutting and subsequent shredding are met through the cutting edge that the bevel angle increases gradually and is distributed in the form of ladder along the axial direction, the problem of material jamming or shredding interruption of single angle cutting edge is avoided, and the operation continuity is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of shredders, and in particular relates to a steel bar shredder with a combined cutter disc. Background Technology

[0002] In fields such as construction waste recycling and metal processing, rebar shredders are key equipment for reducing the volume of rebar and facilitating subsequent resource reuse. Their core requirements are to ensure the continuity of rebar shredding operations to improve processing efficiency, while also taking into account the ease of equipment maintenance to reduce operating costs.

[0003] Existing rebar shredders have significant limitations in their structural design: On the one hand, the blades of existing shredders often adopt a single-angle design, which makes it difficult to simultaneously meet the dual requirements of initial rebar cutting and subsequent shredding. A single-angle blade can easily cause material jamming due to excessive cutting resistance, or it can cause shredding interruption due to insufficient crushing force, thus failing to guarantee continuous operation. On the other hand, most shredders use an integral structure for their blades. When the blades are partially worn or damaged, the entire blade body needs to be replaced, which not only increases the cost of consumables but also significantly extends the downtime for equipment maintenance. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a rebar shredder with a combined cutter disc. The shredder uses three progressively larger inclined blades distributed in a stepped manner along the axial direction to meet the dual needs of initial cutting and subsequent shredding of rebar, avoiding the problem of material jamming or shredding interruption caused by a single-angle blade, thus ensuring continuous operation.

[0005] In view of this, the present invention provides a steel bar shredder with a combined cutter disc, including a shredding mechanism installed in the inner cavity of the shredding box. The shredding mechanism includes two drive rollers, which are rotatably connected to the shredding box. Several fixing rings are fixedly connected to the outer sides of the two drive rollers. Several blades are detachably installed on the outer sides of the fixing rings through detachable components. The blades form a cutter disc. Each blade has three cutting edges. The angles of the three cutting edges increase sequentially and are distributed in a stepped manner along the axial direction to achieve the continuity of the steel bar shredding operation.

[0006] In this technical solution, the blades with three progressively increasing angles and a stepped distribution along the axial direction are adapted to meet the dual requirements of initial cutting and subsequent tearing of steel bars. This avoids the problem of material jamming or tearing interruption caused by a single-angle blade, ensuring continuous operation. At the same time, the detachable component installation solves the problem of needing to replace the entire blade body when it is partially damaged, reducing material costs and shortening downtime for maintenance.

[0007] Furthermore, the three blades on the blade body are at 30°, 35° and 40°, and the height of the top of the three blades increases sequentially by 1mm.

[0008] In this technical solution, the increasing social self of the blade bevel angle and the top height is clearly defined, further optimizing the stepped crushing structure, making the blade cutting and tearing actions smoother, enhancing the adaptability to steel bar crushing, reducing the risk of operation interruption, and improving the continuity of tearing.

[0009] Furthermore, the disassembly assembly includes a wedge-shaped groove formed on the outer periphery of the fixing ring and a wedge-shaped block fixedly connected to the bottom end of the cutter body, which is adapted to and corresponds to the wedge-shaped groove. Both ends of the wedge-shaped block are provided with mounting grooves, and a fixing bolt passes through the mounting groove. The bottom end of the inner cavity of the wedge-shaped groove is provided with a threaded hole adapted to and corresponding to the fixing bolt.

[0010] In this technical solution, the wedge groove and wedge block are matched and matched, and the locking structure of the fixing bolt and threaded hole is combined to realize the convenient disassembly and assembly of the cutter body and the fixing ring. This facilitates the quick replacement of the cutter body with partial damage, without the need to replace the entire cutter body, thereby reducing maintenance costs and shortening maintenance time.

[0011] Furthermore, several blades are staggered around the outer periphery of the two drive rollers, and several cleaning blocks are fixedly connected to both sides of the inner cavity of the shredding box. The cleaning blocks are inserted between two adjacent blades, and the thickness of the cleaning blocks is adapted to the distance between two adjacent blades.

[0012] In this technical solution, the staggered distribution of the drive roller cutters improves shredding efficiency, and the cleaning blocks inserted into the gaps between the cutters can clean up the debris in a timely manner, preventing debris from getting stuck and affecting the operation of the cutters, avoiding operation interruption due to jamming, and ensuring continuous shredding operation.

[0013] Furthermore, gears are fixedly connected to the center of the same end of both drive rollers, and the two gears mesh with each other. A reducer is mounted on the shredding box below the gears via a mounting plate. The power output end of the reducer is connected to the center of one of the gears. A drive motor is mounted on the reducer, and the drive end of the drive motor is connected to the power input end of the reducer via a coupling.

[0014] In this technical solution, the synchronous rotation of the two drive rollers is achieved through gear meshing. Combined with a reducer and a drive motor, a stable power transmission system is formed to ensure smooth operation of the drive rollers, avoid tearing interruptions caused by unstable power, and ensure the continuity of operation.

[0015] Furthermore, a mounting bracket is fixedly connected to the bottom of the shredding box, both ends of the shredding box are open, the top opening of the shredding box is the feed inlet, the bottom opening of the shredding box is the discharge outlet, and a discharge hopper is fixedly installed at the discharge outlet of the shredding box.

[0016] In this technical solution, the mounting frame facilitates equipment fixation, and the opening design of the feed inlet and discharge outlet, combined with the discharge hopper, ensures smooth feeding of steel bars and unobstructed discharge of broken materials, avoiding operation interruptions caused by feed blockage or poor discharge, and maintaining continuous operation.

[0017] Furthermore, the shredders above the two gears are detachably fitted with protective covers by bolts.

[0018] In this technical solution, the detachable protective cover can protect the gears from interference by debris, prevent transmission failures from causing work interruptions, and ensure the safety of operators. Moreover, the detachable design does not affect gear maintenance, thus balancing safety and ease of maintenance.

[0019] The beneficial effects of this utility model are: 1. This utility model uses three blades with progressively increasing angles and a stepped distribution along the axial direction to meet the dual needs of initial cutting and subsequent tearing of steel bars, avoiding the problem of material jamming or tearing interruption caused by a single-angle blade, and ensuring the continuity of operation.

[0020] 2. In this utility model, the blade body is installed through a detachable component, which solves the problem of needing to replace the whole blade body when a part is damaged, reduces the cost of consumables, and shortens the downtime for maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the drive roller and the cutter head of this utility model; Figure 4 This is a schematic diagram of the connection structure between the blade body and the fixing ring of this utility model.

[0022] In the diagram: 1. Shredder; 2. Mounting frame; 3. Discharge hopper; 4. Shredding mechanism; 5. Cleaning block; 6. Reducer; 7. Drive motor; 8. Protective cover; 9. Gear; 10. Drive roller; 11. Fixing ring; 12. Blade body; 13. Blade edge; 14. Mounting groove; 15. Fixing bolt; 16. Threaded hole; 17. Wedge block; 18. Wedge groove. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] It should be noted that, in this application, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples. Example

[0028] like Figure 1-4 As shown, this utility model provides a steel bar shredder with a combined cutter disc, including a shredding mechanism 4 installed in the inner cavity of a shredding box 1. The shredding mechanism 4 includes two drive rollers 10, which are rotatably connected to the shredding box 1. Several fixing rings 11 are fixedly connected to the outer sides of the two drive rollers 10. Several blades 12 are detachably installed on the outer sides of the fixing rings 11 through detachable components. The blades 12 form a cutter disc. Each blade 12 has three cutting edges 13. The angle of the three cutting edges 13 increases sequentially and is distributed in a stepped manner along the axial direction to achieve the continuity of steel bar shredding operation.

[0029] In the example of this application, a cutter disc is formed by combining several cutter bodies 12. The three blades 13 of each cutter body 12 are distributed in a stepped manner along the axial direction, and the angle of the inclined surface increases successively. During operation, after the reinforcing bar enters the shredding box 1, it first contacts the blade 13 with the smaller angle. Due to the acute angle characteristic of this blade 13, the contact area with the surface of the reinforcing bar is small and the pressure per unit area is large, which can easily break through the stress layer on the surface of the reinforcing bar to achieve initial cutting and avoid jamming caused by excessive cutting resistance. Then, as the drive roller 10 rotates, the reinforcing bar is brought into the action area of ​​the blade 13 with the medium angle. This blade 13 has a larger angle than the previous one, and the contact angle between its inclined surface and the reinforcing bar changes, which can generate a tearing component force along the radial direction of the reinforcing bar, thus tearing the already initially cut reinforcing bar. The reinforcing bars are further torn and decomposed, reducing the possibility of them becoming entangled. Ultimately, the reinforcing bars enter the working range of the blade 13 with the largest angle. The blade 13 with the largest angle has higher structural strength and can withstand greater shearing impact force, applying stronger shearing force to the reinforcing bars that have undergone the first two stages of treatment, achieving deep crushing and gradually completing deep shredding. This avoids interruptions in operation caused by excessive resistance or insufficient crushing force of a single blade 13, ensuring continuous shredding. At the same time, the blade body 12 is mounted on the fixing ring 11 through a detachable component. When a single blade body 12 is partially worn or damaged, it can be disassembled and replaced individually without replacing the entire cutter head, greatly reducing material waste and downtime maintenance time, and solving the maintenance pain points of integral cutter heads.

[0030] As a preferred example of this application, the three cutting edges 13 on the blade body 12 are at 30°, 35°, and 40°, and the height of the top of the three cutting edges 13 increases sequentially by 1 mm. Preferably, the blade body 12 is made of Cr12MoV alloy tool steel.

[0031] In the example of this application, the blade 13 with a smaller angle first bites into the rebar quickly at an acute angle. As the height increases, the blade 13 with a larger angle applies a stronger shearing force, making the cutting and tearing actions more seamless and avoiding interruption of force transmission due to parameter mismatch. At the same time, the blade body 12 is made of Cr12MoV alloy tool steel, whose high strength characteristics can withstand the impact and friction when tearing the rebar, reducing the wear rate of the blade 13, extending the service life of a single set of blade bodies 12, and reducing the replacement frequency.

[0032] As a preferred example of this application, the disassembly assembly includes a wedge-shaped groove 18 formed on the outer periphery of the retaining ring 11 and a wedge-shaped block 17 fixedly connected to the bottom end of the blade body 12, which is adapted to and corresponds to the wedge-shaped groove 18. Both ends of the wedge-shaped block 17 have mounting grooves 14, and a fixing bolt 15 passes through the mounting groove 14. The bottom end of the inner cavity of the wedge-shaped groove 18 has a threaded hole 16 adapted to and corresponding to the fixing bolt 15. Preferably, both the wedge-shaped groove 18 and the wedge-shaped block 17 are isosceles trapezoids.

[0033] In the example of this application, the wedge block 17 at the bottom of the cutter body 12 can be precisely embedded into the wedge groove 18 of the fixing ring 11. The isosceles trapezoidal structure design can form a self-positioning constraint through surface contact, preventing the cutter body 12 from loosening during rotation. After the fixing bolt 15 passes through the mounting groove 14 and is screwed into the threaded hole 16, the wedge block 17 and the wedge groove 18 can be rigidly locked, ensuring that the cutter body 12 runs stably with the drive roller 10. When disassembling, the cutter body 12 can be removed simply by loosening the fixing bolt 15. The whole process does not require complicated tools, realizing the quick replacement of the cutter body 12, solving the problem of time-consuming maintenance after partial damage, and improving the maintenance efficiency of the equipment.

[0034] As a preferred example of this application, a plurality of blades 12 are staggered around the outer periphery of the two drive rollers 10, and a plurality of cleaning blocks 5 are fixedly connected to both sides of the inner cavity of the shredding box 1. The plurality of cleaning blocks 5 are respectively inserted between two adjacent blades 12, and the thickness of the cleaning block 5 is adapted to the distance between two adjacent blades 12.

[0035] In the example of this application, the cleaning block 5 of the inner cavity of the shredder 1 is inserted between adjacent blades 12 and is stationary relative to the blades 12. The cleaning block 5 can scrape off the residual scrap in the gap between the blades 12, preventing the accumulation of scrap from causing the blades 12 to jam or increase the rotation resistance, and ensuring that the blades 12 continue to operate stably.

[0036] As a preferred example of this application, gears 9 are fixedly connected to the center of the same end of both drive rollers 10, and the two gears 9 mesh with each other. A reducer 6 is mounted on the shredding box 1 below the gears 9 via a mounting plate. The power output end of the reducer 6 is connected to the center of one of the gears 9. A drive motor 7 is mounted on the reducer 6, and the drive end of the drive motor 7 is connected to the power input end of the reducer 6 via a coupling.

[0037] In the example of this application, the drive motor 7 transmits power to the reducer 6 through a coupling. After reduction, it drives one of the gears 9 to rotate. The two gears 9 mesh with each other and drive the two drive rollers 10 to rotate synchronously in opposite directions. This ensures that the two drive rollers 10 rotate at the same speed and in a coordinated direction, so that the shearing force of the cutter body 12 on the steel bar is stable and controllable. This avoids the steel bar getting stuck or being incompletely shredded due to speed deviation, and ensures continuous and stable power output, providing reliable power support for continuous shredding operations.

[0038] As a preferred example of this application, the bottom end of the shredding box 1 is fixedly connected to the mounting bracket 2, both ends of the shredding box 1 are open, the top opening of the shredding box 1 is the feed inlet, the bottom opening of the shredding box 1 is the discharge outlet, and a discharge hopper 3 is fixedly installed at the discharge outlet of the shredding box 1.

[0039] In the example of this application, the mounting frame 2 securely fixes the shredding box 1 to prevent the overall displacement caused by vibration during equipment operation, and provides a foundation for the stable operation of the internal mechanism; the top feed port facilitates the smooth entry of steel bars into the shredding area, and the bottom discharge port, together with the discharge hopper 3, can guide the shredded material to be discharged in a timely manner, preventing the shredded material from accumulating in the box and hindering the operation of the blade 12 or blocking the feed channel, thus avoiding operation interruption due to poor material flow.

[0040] As a preferred example of this application, the shredder 1 above the two gears 9 is detachably fitted with a protective cover 8 by bolts.

[0041] In the example of this application, the protective cover 8 covers the gear 9 and can prevent external debris (such as scraps and dust) from entering the meshing area of ​​the gear 9, thus avoiding the transmission failure caused by debris jamming the gear 9 and ensuring the continuous and stable rotation of the drive roller 10. At the same time, the protective cover 8 can be detached and installed by bolts, so that the protective cover 8 can be quickly removed when the gear 9 needs to be inspected or maintained, thereby improving the efficiency of inspection and maintenance.

[0042] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A steel bar shredder with a combined cutter head, characterized in that, The shredding mechanism (4) is installed in the inner cavity of the shredding box (1). The shredding mechanism (4) includes two drive rollers (10), and the two drive rollers (10) are rotatably connected in the shredding box (1). Several fixing rings (11) are fixedly connected to the outer side of each of the two drive rollers (10). Several blades (12) are detachably installed on the outer side of each of the fixing rings (11) through a detachable component. The blades (12) form a blade disc. Each blade (12) has three blades (13). The angle of the slope of the three blades (13) increases sequentially and is distributed in a stepped manner along the axial direction.

2. The steel bar shredder with a combined cutter head according to claim 1, characterized in that, The three blades (13) on the blade body (12) are 30°, 35° and 40°, and the height of the top of the three blades (13) increases sequentially by 1 mm.

3. A steel bar shredder with a combined cutter head according to claim 2, characterized in that, The disassembly assembly includes a wedge-shaped groove (18) on the outer periphery of the fixing ring (11) and a wedge-shaped block (17) that is adapted to and corresponds to the wedge-shaped groove (18) and fixedly connected to the bottom end of the blade body (12). Both ends of the wedge-shaped block (17) are provided with mounting grooves (14), and a fixing bolt (15) passes through the mounting groove (14). The bottom end of the inner cavity of the wedge-shaped groove (18) is provided with a threaded hole (16) that is adapted to and corresponds to the fixing bolt (15).

4. A steel bar shredder with a combined cutter head according to claim 2, characterized in that, Several blades (12) are staggered around the outer periphery of the two drive rollers (10). Several cleaning blocks (5) are fixedly connected to both sides of the inner cavity of the shredding box (1). Several cleaning blocks (5) are inserted between two adjacent blades (12), and the thickness of the cleaning block (5) is adapted to the distance between two adjacent blades (12).

5. A steel bar shredder with a combined cutter head according to claim 1, characterized in that, Gears (9) are fixedly connected to the center of the same end of the two drive rollers (10), and the two gears (9) mesh with each other. A reducer (6) is installed on the shredding box (1) below the gears (9) through a mounting plate. The power output end of the reducer (6) is connected to the center of one of the gears (9). A drive motor (7) is installed on the reducer (6), and the drive end of the drive motor (7) is connected to the power input end of the reducer (6) through a coupling.

6. A steel bar shredder with a combined cutter head according to claim 1, characterized in that, The bottom end of the shredding box (1) is fixedly connected to the mounting bracket (2). Both ends of the shredding box (1) are open. The top opening of the shredding box (1) is the feed inlet, and the bottom opening of the shredding box (1) is the discharge outlet. A discharge hopper (3) is fixedly installed at the discharge outlet of the shredding box (1).

7. A steel bar shredder with a combined cutter head according to claim 5, characterized in that, The shredder (1) above the two gears (9) is detachably fitted with a protective cover (8) by bolts.

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