A construction waste pulverizing device

Abstract

This utility model discloses a construction waste crushing device, comprising a base, a drive motor, a crushing frame, an eccentric shaft, and a pulley assembly. The crushing frame contains a detachable fixed jaw plate and a movable jaw plate, the movable jaw plate being hinged to the crushing frame via a connecting rod. The device also includes a top-feeding assembly, whose pressure rod passes through the crushing frame and has a top-feeding rod. A torsion spring at the center of rotation of the pressure rod causes the top-feeding rod to approach the jaw plate gap. The top-feeding assembly further includes a fixed plate, a push rod, and an eccentric cam. When the eccentric shaft rotates, the eccentric cam presses against the push rod, causing the push plate to intermittently drive the pressure rod, causing the top-feeding rod to intermittently push into the gap. First and second pulleys are respectively provided at the mating points of the pressure rod and push plate, and the push rod and eccentric cam, to reduce friction. An inertia wheel is provided at one end of the eccentric shaft, and both the inertia wheel and the large pulley have weight-reducing holes. The large pulley also has reinforcing ribs. This device achieves automatic anti-jamming through mechanical linkage, has a compact structure, low energy consumption, and is suitable for efficient crushing of construction waste.

Description

Technical Field

[0001] This utility model relates to the field of crushing equipment technology, specifically a construction waste crushing device. Background Technology

[0002] Direct dumping or landfilling of construction waste not only occupies large amounts of land, pollutes soil and groundwater, and generates environmental problems such as dust and noise, but also wastes resources. The concrete and brick slag contained within can be processed into recycled aggregates to replace natural sand and gravel, while steel bars and other metals, as well as glass and plastics, can be efficiently recycled and reused. Through crushing and processing, transportation and landfill costs can be significantly reduced, creating economic value from recycled resources. This also responds to the national circular economy policy, contributes to the "dual carbon" target, and achieves multiple benefits of reducing pollution, conserving resources, and promoting green development. It is a key measure to promote the sustainable development of the construction industry.

[0003] Existing construction waste crushing equipment lacks effective top material or anti-jamming mechanisms. During the crushing process, materials are easily stuck in the crushing chamber or discharge gap, causing equipment blockage, affecting crushing efficiency, and may even require manual shutdown for cleaning, reducing the continuity and automation of the work. Utility Model Content

[0004] The purpose of this invention is to provide a construction waste pulverizing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A construction waste crushing device includes a base, a drive motor and a crushing frame mounted on the base, an eccentric shaft rotatably mounted on the crushing frame, the eccentric shaft and the drive motor being driven by a pulley set, a detachable fixed jaw plate on the crushing frame, and a movable jaw plate rotatably mounted on the eccentric shaft, the movable jaw plate being rotatably connected to the crushing frame via several connecting rods.

[0007] It also includes a top material assembly, which is a pressure rod rotatably mounted on the crushing frame. The pressure rod passes through the crushing frame and is equipped with multiple sets of top material rods. The top material rods can pass through the gap between the fixed jaw plate and the movable jaw plate. A torsion spring is provided at the rotation center of the pressure rod, and the torsion spring causes the top material rods to always move towards the gap between the fixed jaw plate and the movable jaw plate.

[0008] Preferably, the top material assembly further includes a fixed plate disposed on the side wall of the crushing frame, a push rod slidably disposed on the fixed plate, a push plate disposed at one end of the push rod, the push plate cooperating with the end of the pressure rod away from the rotation center; an eccentric cam disposed at the end of the eccentric shaft, the eccentric cam cooperating with the top end of the push rod, when the eccentric shaft rotates to crush, the eccentric cam intermittently squeezes the push rod, the push rod intermittently squeezes the pressure rod, causing the top material rod to intermittently push into the gap between the fixed jaw plate and the movable jaw plate, and the torsion spring causing the top material rod to always move away from the gap between the fixed jaw plate and the movable jaw plate.

[0009] Preferably, at the position where the pressure rod mates with the push plate, a first pulley is rotatably provided on the pressure rod.

[0010] Preferably, at the position where the push rod engages with the eccentric cam, a second pulley is provided on the push rod.

[0011] Preferably, an inertia wheel is provided at one end of the eccentric shaft.

[0012] Preferably, the inertia wheel has several weight-reducing holes.

[0013] Preferably, the large pulley in the pulley assembly is provided with weight-reducing holes and reinforcing ribs.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The top material assembly automatically pushes the material stuck between the fixed jaw plate and the movable jaw plate during the crushing process through the mechanical linkage of the eccentric shaft and the eccentric cam. No manual intervention or additional power is required, which significantly reduces the risk of blockage and ensures the continuity of crushing operation.

[0016] 2. The reset torque provided by the torsion spring allows the top rod to quickly return to its initial position after completing the material ejection, synchronizing with the crushing action rhythm, avoiding downtime caused by material jamming, and improving the overall operating efficiency of the device.

[0017] 3. The inertia wheel at the end of the eccentric shaft, combined with the weight-reducing hole design, balances the rotational torque and reduces equipment vibration; the large pulley of the pulley set, through the reinforcing ribs and weight-reducing hole structure, reduces weight while increasing strength, reduces the load on the drive motor, and achieves the dual effects of energy saving and stable operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the overall device of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the crushing frame part of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the internal structure of this utility model;

[0021] Figure 4 This is a half-sectional view of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the top material rod of this utility model.

[0023] In the diagram: 1. Base; 2. Drive motor; 3. Crushing frame; 4. Eccentric shaft; 5. Pulley assembly; 6. Fixed jaw plate; 7. Movable jaw plate; 8. Connecting rod; 9. Ejector assembly; 901. Pressure rod; 902. Ejector rod; 903. Torsion spring; 904. Fixed plate; 905. Push rod; 906. Push plate; 907. Eccentric cam; 10. First pulley; 11. Second pulley; 12. Inertia wheel; 13. Weight reduction hole; 14. Reinforcing rib. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] Example 1:

[0027] This device includes a rectangular base 1. A drive motor 2 and a crushing frame 3 are bolted or welded to the top of the base 1. The crushing frame 3 is a cuboid metal frame with an open top. Its internal side walls are rotatably supported by a horizontally positioned eccentric shaft 4 via bearing seats. The axis of the eccentric shaft 4 is perpendicular to the length of the crushing frame 3. One end of the eccentric shaft 4 extends to the outside of the crushing frame 3 and is connected to the output shaft of the drive motor 2 via a pulley set 5. Specifically, a small pulley is fixed to the output shaft of the drive motor 2, and a large pulley is fixed to the end of the eccentric shaft 4. The small pulley and the large pulley are connected by a transmission belt.

[0028] A detachable fixed jaw plate 6 is fixedly installed on the inner wall of the front end of the crushing frame 3 by bolts. The crushing surface of the fixed jaw plate 6 has a toothed structure. A movable jaw plate 7 is mounted on the eccentric shaft 4. The movable jaw plate 7 reciprocates through the eccentric part of the eccentric shaft 4. Its back is hinged to the rear wall of the crushing frame 3 through two sets of connecting rods 8 to form a crank-connecting rod 8 mechanism, so that the gap between the movable jaw plate 7 and the fixed jaw plate 6 can be periodically expanded or reduced to achieve the crushing of construction waste.

[0029] A top-feeding assembly 9 is installed at the bottom discharge port of the crushing frame 3, specifically including a pressure rod 901. The pressure rod 901 is hinged to the inner side of the bottom side plate of the crushing frame 3 via a bearing and can swing around the bearing within the crushing frame 3. Multiple sets of top-feeding rods 902 are evenly fixed along the length of the upper surface of the pressure rod 901. The top-feeding rods 902 are C-shaped metal rods, with their upper ends extending toward the discharge gap between the fixed jaw plate 6 and the movable jaw plate 7, and can push the material upward through the discharge gap. The ends of the top-feeding rods 902 are provided with tapered chamfers to better crush or push the material. A torsion spring 903 is installed at the rotating part of the pressure rod 901. One end of the torsion spring 903 is fixed to the side plate of the crushing frame 3, and the other end is fixed to the pressure rod 901, so that the torsion spring 903 always applies a counterclockwise torque to the pressure rod 901 (taking the direction in the figure as an example), causing the top-feeding rod 902 to deflect toward the direction closer to the discharge gap, that is, the top-feeding rod 902 normally moves upward toward the bottom of the discharge gap.

[0030] It should be noted that the elastic force of the torsion spring 903 is sufficient to drive the push rod 905 or the pressure rod 901 to reset. The manufacturer can select a torsion spring 903 with appropriate torque for processing and manufacturing, or the pressure rod 901 can be reset by multiple or various types of springs or torsion springs 903.

[0031] In this embodiment, since the torsion spring 903 drives the top material rod 902 to deflect towards the discharge gap, when some of the heavier construction waste is pressed onto part of the top material rod 902, the top material rod 902 will rotate downward. At the same time, due to the crushing by the jaw plate, the heavier construction waste is crushed. At this time, the top material rod 902 will reset under the action of the torsion spring 903. The elastic force of the torsion spring 903 drives the top material rod 902 to strike the construction waste. Due to the conical surface at the top of the top material rod 902, it can also crush the construction waste, achieving a better crushing effect.

[0032] Example 2:

[0033] A rectangular fixing plate 904 is vertically arranged and fixed to the outer side of the right side wall of the crushing frame 3 by bolts. The fixing plate 904 has a through circular vertical groove, the diameter of which is adapted to the outer diameter of the push rod 905. The push rod 905 is a cylindrical metal rod with a clearance fit between its body and the groove. A planar anti-rotation plane (not shown in the figure) is provided along the axial direction on the outer circumference of the top of the push rod 905. This plane cooperates with the limiting protrusion (or key block) on the inner wall of the groove to form an anti-rotation structure, so that the push rod 905 can only slide vertically along the groove and cannot rotate around the axis.

[0034] The lower end of the push rod 905 is vertically fixed to a rectangular push plate 906. The upper surface of the push plate 906 is smooth and contacts the bottom surface of the right end of the pressure rod 901. The top end extends upward to above the fixed plate 904, and the end is machined into a spherical surface to fit the curved surface of the eccentric cam 907. The eccentric cam 907 is a disc-shaped component, which is connected and fitted to the end of the eccentric shaft 4 by a key. Its center is eccentrically set with respect to the rotation axis of the eccentric shaft 4. When the eccentric shaft 4 rotates, the arc contour of the outer circumference of the eccentric cam 907 periodically presses the top end of the push rod 905. When the distal end approaches the push rod 905, the push rod 905 slides downward along the slide groove under the pressure, and the push plate 906 pushes the right end of the pressure rod 901. When the proximal end turns towards the push rod 905, the push rod 905 returns to its original position along the slide groove under the elastic force of the torsion spring 903. This structure reduces sliding friction through the cooperation of the cylindrical push rod 905 and the circular slide groove, and the anti-rotation plane or keyway structure ensures accurate transmission direction (not shown in the figure), so that the top material assembly 9 is synchronized with the crushing action, which is suitable for high-frequency construction waste crushing scenarios.

[0035] It should be noted that the elastic force of the torsion spring 903 is sufficient to drive the push rod 905 or the pressure rod 901 to reset. The manufacturer can select a torsion spring 903 with appropriate torque for processing and manufacturing, or the pressure rod 901 can be reset by multiple or various types of springs or torsion springs 903.

[0036] Example 3:

[0037] At the contact position between the pressure rod 901 and the push plate 906, a first pulley 10 is rotatably mounted on the bottom surface of the pressure rod 901 via a bearing. The outer circumferential surface of the first pulley 10 rolls in contact with the upper surface of the push plate 906 to reduce friction when the two slide relative to each other. At the contact position between the top of the push rod 905 and the eccentric cam 907, a second pulley 11 is rotatably mounted on the top of the push rod 905 via a bearing. The outer circumferential surface of the second pulley 11 rolls in contact with the outer circumferential surface of the eccentric cam 907 to further reduce mechanical wear.

[0038] An inertia wheel 12 is fixedly installed at the other end of the eccentric shaft 4. The inertia wheel 12 is a disc-shaped metal component with multiple weight-reducing holes 13 evenly distributed on its circumference to reduce the moment of inertia and balance the rotational torque of the eccentric shaft 4. Weight-reducing holes 13 are also provided on the large pulley of the pulley assembly 5, and triangular reinforcing ribs 14 are provided between the spokes of the large pulley to improve the structural strength.

[0039] Working principle:

[0040] When the drive motor 2 starts, it drives the eccentric shaft 4 to rotate at high speed through the pulley set 5, and the movable jaw plate 7 reciprocates under the drive of the connecting rod 8.

[0041] When the movable jaw plate 7 swings towards the fixed jaw plate 6, the gap between the two narrows, and the construction waste is squeezed and crushed.

[0042] During the rotation of the eccentric shaft 4, the eccentric cam 907 rotates synchronously. When the protrusion of the eccentric cam 907 presses against the second pulley 11 at the top of the push rod 905, the push rod 905 slides downward along the groove of the fixed plate 904. The push plate 906 pushes the right end of the pressure rod 901 to swing downward through the first pulley 10. The pressure rod 901 rotates clockwise (overcoming the elastic force of the torsion spring 903), which drives the top material rod 902 to insert downward into the gap between the fixed jaw plate 6 and the movable jaw plate 7, pushing out the material stuck in the gap.

[0043] When the protrusion of the eccentric cam 907 rotates away from the top of the push rod 905, the elastic force of the torsion spring 903 drives the pressure rod 901 to reset clockwise, and the top material rod 902 disengages from the crushing gap, waiting for the top material action of the next cycle.

[0044] Through the above structural design, the top material assembly 9 is synchronized with the crushing action, which can automatically clear the jammed material, avoid equipment blockage, and improve crushing efficiency; the setting of the inertia wheel 12 and the weight reduction hole 13 can reduce energy consumption fluctuations and enhance the stability of equipment operation; the design of the pulley and the reinforcing rib 14 improves the service life of mechanical parts.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction waste crushing device, comprising a base (1), a drive motor (2) and a crushing frame (3) mounted on the base (1), wherein an eccentric shaft (4) is rotatably mounted on the crushing frame (3), the eccentric shaft (4) and the drive motor (2) are driven by a pulley set (5), a detachable fixed jaw plate (6) is mounted on the crushing frame (3), and a movable jaw plate (7) is rotatably mounted on the eccentric shaft (4), the movable jaw plate (7) being rotatably connected to the crushing frame (3) by a plurality of connecting rods (8), characterized in that: It also includes a top material assembly (9), which is a pressure rod (901) rotatably mounted on the crushing frame (3). The pressure rod (901) passes through the crushing frame (3). Multiple sets of top material rods (902) are provided on the pressure rod (901). The top material rods (902) can pass through the gap between the fixed jaw plate (6) and the movable jaw plate (7). A torsion spring (903) is provided at the rotation center of the pressure rod (901). The torsion spring (903) makes the top material rod (902) always move towards the gap between the fixed jaw plate (6) and the movable jaw plate (7).

2. The construction waste pulverizing device according to claim 1, characterized in that: The top material assembly (9) further includes a fixed plate (904) disposed on the side wall of the crushing frame (3), a push rod (905) is slidably disposed on the fixed plate (904), a push plate (906) is disposed at one end of the push rod (905), and the push plate (906) cooperates with the end of the pressure rod (901) away from the rotation center; an eccentric cam (907) is disposed at the end of the eccentric shaft (4), and the eccentric cam (907) cooperates with the top end of the push rod (905). When the eccentric shaft (4) rotates to crush, the eccentric cam (907) intermittently squeezes the push rod (905), and the push rod (905) intermittently squeezes the pressure rod (901), so that the top material rod (902) intermittently pushes into the gap between the fixed jaw plate (6) and the movable jaw plate (7). The torsion spring (903) makes the top material rod (902) always move away from the gap between the fixed jaw plate (6) and the movable jaw plate (7).

3. The construction waste pulverizing device according to claim 2, characterized in that: At the position where the pressure rod (901) and the push plate (906) cooperate, a first pulley (10) is rotatably provided on the pressure rod (901).

4. The construction waste pulverizing device according to claim 2, characterized in that: At the position where the push rod (905) engages with the eccentric cam (907), a second pulley (11) is provided on the push rod (905).

5. A construction waste pulverizing device according to any one of claims 1-4, characterized in that: An inertia wheel (12) is provided at one end of the eccentric shaft (4).

6. A construction waste pulverizing device according to claim 5, characterized in that: The inertia wheel (12) has several weight-reducing holes (13).

7. A construction waste pulverizing device according to any one of claims 1-4, characterized in that: The large pulley in the pulley assembly (5) is provided with weight reduction holes (13) and reinforcing ribs (14).

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